diff options
Diffstat (limited to 'src/linux-user/signal.c')
| -rw-r--r-- | src/linux-user/signal.c | 5831 |
1 files changed, 5831 insertions, 0 deletions
diff --git a/src/linux-user/signal.c b/src/linux-user/signal.c new file mode 100644 index 0000000..9d62e02 --- /dev/null +++ b/src/linux-user/signal.c @@ -0,0 +1,5831 @@ +/* + * Emulation of Linux signals + * + * Copyright (c) 2003 Fabrice Bellard + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <stdarg.h> +#include <unistd.h> +#include <errno.h> +#include <sys/ucontext.h> +#include <sys/resource.h> + +#include "qemu.h" +#include "qemu-common.h" +#include "target_signal.h" + +//#define DEBUG_SIGNAL + +static struct target_sigaltstack target_sigaltstack_used = { + .ss_sp = 0, + .ss_size = 0, + .ss_flags = TARGET_SS_DISABLE, +}; + +static struct target_sigaction sigact_table[TARGET_NSIG]; + +static void host_signal_handler(int host_signum, siginfo_t *info, + void *puc); + +static uint8_t host_to_target_signal_table[_NSIG] = { + [SIGHUP] = TARGET_SIGHUP, + [SIGINT] = TARGET_SIGINT, + [SIGQUIT] = TARGET_SIGQUIT, + [SIGILL] = TARGET_SIGILL, + [SIGTRAP] = TARGET_SIGTRAP, + [SIGABRT] = TARGET_SIGABRT, +/* [SIGIOT] = TARGET_SIGIOT,*/ + [SIGBUS] = TARGET_SIGBUS, + [SIGFPE] = TARGET_SIGFPE, + [SIGKILL] = TARGET_SIGKILL, + [SIGUSR1] = TARGET_SIGUSR1, + [SIGSEGV] = TARGET_SIGSEGV, + [SIGUSR2] = TARGET_SIGUSR2, + [SIGPIPE] = TARGET_SIGPIPE, + [SIGALRM] = TARGET_SIGALRM, + [SIGTERM] = TARGET_SIGTERM, +#ifdef SIGSTKFLT + [SIGSTKFLT] = TARGET_SIGSTKFLT, +#endif + [SIGCHLD] = TARGET_SIGCHLD, + [SIGCONT] = TARGET_SIGCONT, + [SIGSTOP] = TARGET_SIGSTOP, + [SIGTSTP] = TARGET_SIGTSTP, + [SIGTTIN] = TARGET_SIGTTIN, + [SIGTTOU] = TARGET_SIGTTOU, + [SIGURG] = TARGET_SIGURG, + [SIGXCPU] = TARGET_SIGXCPU, + [SIGXFSZ] = TARGET_SIGXFSZ, + [SIGVTALRM] = TARGET_SIGVTALRM, + [SIGPROF] = TARGET_SIGPROF, + [SIGWINCH] = TARGET_SIGWINCH, + [SIGIO] = TARGET_SIGIO, + [SIGPWR] = TARGET_SIGPWR, + [SIGSYS] = TARGET_SIGSYS, + /* next signals stay the same */ + /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with + host libpthread signals. This assumes no one actually uses SIGRTMAX :-/ + To fix this properly we need to do manual signal delivery multiplexed + over a single host signal. */ + [__SIGRTMIN] = __SIGRTMAX, + [__SIGRTMAX] = __SIGRTMIN, +}; +static uint8_t target_to_host_signal_table[_NSIG]; + +static inline int on_sig_stack(unsigned long sp) +{ + return (sp - target_sigaltstack_used.ss_sp + < target_sigaltstack_used.ss_size); +} + +static inline int sas_ss_flags(unsigned long sp) +{ + return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE + : on_sig_stack(sp) ? SS_ONSTACK : 0); +} + +int host_to_target_signal(int sig) +{ + if (sig < 0 || sig >= _NSIG) + return sig; + return host_to_target_signal_table[sig]; +} + +int target_to_host_signal(int sig) +{ + if (sig < 0 || sig >= _NSIG) + return sig; + return target_to_host_signal_table[sig]; +} + +static inline void target_sigemptyset(target_sigset_t *set) +{ + memset(set, 0, sizeof(*set)); +} + +static inline void target_sigaddset(target_sigset_t *set, int signum) +{ + signum--; + abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); + set->sig[signum / TARGET_NSIG_BPW] |= mask; +} + +static inline int target_sigismember(const target_sigset_t *set, int signum) +{ + signum--; + abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); + return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); +} + +static void host_to_target_sigset_internal(target_sigset_t *d, + const sigset_t *s) +{ + int i; + target_sigemptyset(d); + for (i = 1; i <= TARGET_NSIG; i++) { + if (sigismember(s, i)) { + target_sigaddset(d, host_to_target_signal(i)); + } + } +} + +void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) +{ + target_sigset_t d1; + int i; + + host_to_target_sigset_internal(&d1, s); + for(i = 0;i < TARGET_NSIG_WORDS; i++) + d->sig[i] = tswapal(d1.sig[i]); +} + +static void target_to_host_sigset_internal(sigset_t *d, + const target_sigset_t *s) +{ + int i; + sigemptyset(d); + for (i = 1; i <= TARGET_NSIG; i++) { + if (target_sigismember(s, i)) { + sigaddset(d, target_to_host_signal(i)); + } + } +} + +void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) +{ + target_sigset_t s1; + int i; + + for(i = 0;i < TARGET_NSIG_WORDS; i++) + s1.sig[i] = tswapal(s->sig[i]); + target_to_host_sigset_internal(d, &s1); +} + +void host_to_target_old_sigset(abi_ulong *old_sigset, + const sigset_t *sigset) +{ + target_sigset_t d; + host_to_target_sigset(&d, sigset); + *old_sigset = d.sig[0]; +} + +void target_to_host_old_sigset(sigset_t *sigset, + const abi_ulong *old_sigset) +{ + target_sigset_t d; + int i; + + d.sig[0] = *old_sigset; + for(i = 1;i < TARGET_NSIG_WORDS; i++) + d.sig[i] = 0; + target_to_host_sigset(sigset, &d); +} + +/* Wrapper for sigprocmask function + * Emulates a sigprocmask in a safe way for the guest. Note that set and oldset + * are host signal set, not guest ones. This wraps the sigprocmask host calls + * that should be protected (calls originated from guest) + */ +int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset) +{ + int ret; + sigset_t val; + sigset_t *temp = NULL; + CPUState *cpu = thread_cpu; + TaskState *ts = (TaskState *)cpu->opaque; + bool segv_was_blocked = ts->sigsegv_blocked; + + if (set) { + bool has_sigsegv = sigismember(set, SIGSEGV); + val = *set; + temp = &val; + + sigdelset(temp, SIGSEGV); + + switch (how) { + case SIG_BLOCK: + if (has_sigsegv) { + ts->sigsegv_blocked = true; + } + break; + case SIG_UNBLOCK: + if (has_sigsegv) { + ts->sigsegv_blocked = false; + } + break; + case SIG_SETMASK: + ts->sigsegv_blocked = has_sigsegv; + break; + default: + g_assert_not_reached(); + } + } + + ret = sigprocmask(how, temp, oldset); + + if (oldset && segv_was_blocked) { + sigaddset(oldset, SIGSEGV); + } + + return ret; +} + +/* siginfo conversion */ + +static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, + const siginfo_t *info) +{ + int sig = host_to_target_signal(info->si_signo); + tinfo->si_signo = sig; + tinfo->si_errno = 0; + tinfo->si_code = info->si_code; + + if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV + || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) { + /* Should never come here, but who knows. The information for + the target is irrelevant. */ + tinfo->_sifields._sigfault._addr = 0; + } else if (sig == TARGET_SIGIO) { + tinfo->_sifields._sigpoll._band = info->si_band; + tinfo->_sifields._sigpoll._fd = info->si_fd; + } else if (sig == TARGET_SIGCHLD) { + tinfo->_sifields._sigchld._pid = info->si_pid; + tinfo->_sifields._sigchld._uid = info->si_uid; + tinfo->_sifields._sigchld._status + = host_to_target_waitstatus(info->si_status); + tinfo->_sifields._sigchld._utime = info->si_utime; + tinfo->_sifields._sigchld._stime = info->si_stime; + } else if (sig >= TARGET_SIGRTMIN) { + tinfo->_sifields._rt._pid = info->si_pid; + tinfo->_sifields._rt._uid = info->si_uid; + /* XXX: potential problem if 64 bit */ + tinfo->_sifields._rt._sigval.sival_ptr + = (abi_ulong)(unsigned long)info->si_value.sival_ptr; + } +} + +static void tswap_siginfo(target_siginfo_t *tinfo, + const target_siginfo_t *info) +{ + int sig = info->si_signo; + tinfo->si_signo = tswap32(sig); + tinfo->si_errno = tswap32(info->si_errno); + tinfo->si_code = tswap32(info->si_code); + + if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV + || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) { + tinfo->_sifields._sigfault._addr + = tswapal(info->_sifields._sigfault._addr); + } else if (sig == TARGET_SIGIO) { + tinfo->_sifields._sigpoll._band + = tswap32(info->_sifields._sigpoll._band); + tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); + } else if (sig == TARGET_SIGCHLD) { + tinfo->_sifields._sigchld._pid + = tswap32(info->_sifields._sigchld._pid); + tinfo->_sifields._sigchld._uid + = tswap32(info->_sifields._sigchld._uid); + tinfo->_sifields._sigchld._status + = tswap32(info->_sifields._sigchld._status); + tinfo->_sifields._sigchld._utime + = tswapal(info->_sifields._sigchld._utime); + tinfo->_sifields._sigchld._stime + = tswapal(info->_sifields._sigchld._stime); + } else if (sig >= TARGET_SIGRTMIN) { + tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); + tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); + tinfo->_sifields._rt._sigval.sival_ptr + = tswapal(info->_sifields._rt._sigval.sival_ptr); + } +} + + +void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) +{ + host_to_target_siginfo_noswap(tinfo, info); + tswap_siginfo(tinfo, tinfo); +} + +/* XXX: we support only POSIX RT signals are used. */ +/* XXX: find a solution for 64 bit (additional malloced data is needed) */ +void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) +{ + info->si_signo = tswap32(tinfo->si_signo); + info->si_errno = tswap32(tinfo->si_errno); + info->si_code = tswap32(tinfo->si_code); + info->si_pid = tswap32(tinfo->_sifields._rt._pid); + info->si_uid = tswap32(tinfo->_sifields._rt._uid); + info->si_value.sival_ptr = + (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr); +} + +static int fatal_signal (int sig) +{ + switch (sig) { + case TARGET_SIGCHLD: + case TARGET_SIGURG: + case TARGET_SIGWINCH: + /* Ignored by default. */ + return 0; + case TARGET_SIGCONT: + case TARGET_SIGSTOP: + case TARGET_SIGTSTP: + case TARGET_SIGTTIN: + case TARGET_SIGTTOU: + /* Job control signals. */ + return 0; + default: + return 1; + } +} + +/* returns 1 if given signal should dump core if not handled */ +static int core_dump_signal(int sig) +{ + switch (sig) { + case TARGET_SIGABRT: + case TARGET_SIGFPE: + case TARGET_SIGILL: + case TARGET_SIGQUIT: + case TARGET_SIGSEGV: + case TARGET_SIGTRAP: + case TARGET_SIGBUS: + return (1); + default: + return (0); + } +} + +void signal_init(void) +{ + struct sigaction act; + struct sigaction oact; + int i, j; + int host_sig; + + /* generate signal conversion tables */ + for(i = 1; i < _NSIG; i++) { + if (host_to_target_signal_table[i] == 0) + host_to_target_signal_table[i] = i; + } + for(i = 1; i < _NSIG; i++) { + j = host_to_target_signal_table[i]; + target_to_host_signal_table[j] = i; + } + + /* set all host signal handlers. ALL signals are blocked during + the handlers to serialize them. */ + memset(sigact_table, 0, sizeof(sigact_table)); + + sigfillset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + act.sa_sigaction = host_signal_handler; + for(i = 1; i <= TARGET_NSIG; i++) { + host_sig = target_to_host_signal(i); + sigaction(host_sig, NULL, &oact); + if (oact.sa_sigaction == (void *)SIG_IGN) { + sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN; + } else if (oact.sa_sigaction == (void *)SIG_DFL) { + sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL; + } + /* If there's already a handler installed then something has + gone horribly wrong, so don't even try to handle that case. */ + /* Install some handlers for our own use. We need at least + SIGSEGV and SIGBUS, to detect exceptions. We can not just + trap all signals because it affects syscall interrupt + behavior. But do trap all default-fatal signals. */ + if (fatal_signal (i)) + sigaction(host_sig, &act, NULL); + } +} + +/* signal queue handling */ + +static inline struct sigqueue *alloc_sigqueue(CPUArchState *env) +{ + CPUState *cpu = ENV_GET_CPU(env); + TaskState *ts = cpu->opaque; + struct sigqueue *q = ts->first_free; + if (!q) + return NULL; + ts->first_free = q->next; + return q; +} + +static inline void free_sigqueue(CPUArchState *env, struct sigqueue *q) +{ + CPUState *cpu = ENV_GET_CPU(env); + TaskState *ts = cpu->opaque; + + q->next = ts->first_free; + ts->first_free = q; +} + +/* abort execution with signal */ +static void QEMU_NORETURN force_sig(int target_sig) +{ + CPUState *cpu = thread_cpu; + CPUArchState *env = cpu->env_ptr; + TaskState *ts = (TaskState *)cpu->opaque; + int host_sig, core_dumped = 0; + struct sigaction act; + host_sig = target_to_host_signal(target_sig); + gdb_signalled(env, target_sig); + + /* dump core if supported by target binary format */ + if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) { + stop_all_tasks(); + core_dumped = + ((*ts->bprm->core_dump)(target_sig, env) == 0); + } + if (core_dumped) { + /* we already dumped the core of target process, we don't want + * a coredump of qemu itself */ + struct rlimit nodump; + getrlimit(RLIMIT_CORE, &nodump); + nodump.rlim_cur=0; + setrlimit(RLIMIT_CORE, &nodump); + (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", + target_sig, strsignal(host_sig), "core dumped" ); + } + + /* The proper exit code for dying from an uncaught signal is + * -<signal>. The kernel doesn't allow exit() or _exit() to pass + * a negative value. To get the proper exit code we need to + * actually die from an uncaught signal. Here the default signal + * handler is installed, we send ourself a signal and we wait for + * it to arrive. */ + sigfillset(&act.sa_mask); + act.sa_handler = SIG_DFL; + act.sa_flags = 0; + sigaction(host_sig, &act, NULL); + + /* For some reason raise(host_sig) doesn't send the signal when + * statically linked on x86-64. */ + kill(getpid(), host_sig); + + /* Make sure the signal isn't masked (just reuse the mask inside + of act) */ + sigdelset(&act.sa_mask, host_sig); + sigsuspend(&act.sa_mask); + + /* unreachable */ + abort(); +} + +/* queue a signal so that it will be send to the virtual CPU as soon + as possible */ +int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info) +{ + CPUState *cpu = ENV_GET_CPU(env); + TaskState *ts = cpu->opaque; + struct emulated_sigtable *k; + struct sigqueue *q, **pq; + abi_ulong handler; + int queue; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "queue_signal: sig=%d\n", + sig); +#endif + k = &ts->sigtab[sig - 1]; + queue = gdb_queuesig (); + handler = sigact_table[sig - 1]._sa_handler; + + if (ts->sigsegv_blocked && sig == TARGET_SIGSEGV) { + /* Guest has blocked SIGSEGV but we got one anyway. Assume this + * is a forced SIGSEGV (ie one the kernel handles via force_sig_info + * because it got a real MMU fault). A blocked SIGSEGV in that + * situation is treated as if using the default handler. This is + * not correct if some other process has randomly sent us a SIGSEGV + * via kill(), but that is not easy to distinguish at this point, + * so we assume it doesn't happen. + */ + handler = TARGET_SIG_DFL; + } + + if (!queue && handler == TARGET_SIG_DFL) { + if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { + kill(getpid(),SIGSTOP); + return 0; + } else + /* default handler : ignore some signal. The other are fatal */ + if (sig != TARGET_SIGCHLD && + sig != TARGET_SIGURG && + sig != TARGET_SIGWINCH && + sig != TARGET_SIGCONT) { + force_sig(sig); + } else { + return 0; /* indicate ignored */ + } + } else if (!queue && handler == TARGET_SIG_IGN) { + /* ignore signal */ + return 0; + } else if (!queue && handler == TARGET_SIG_ERR) { + force_sig(sig); + } else { + pq = &k->first; + if (sig < TARGET_SIGRTMIN) { + /* if non real time signal, we queue exactly one signal */ + if (!k->pending) + q = &k->info; + else + return 0; + } else { + if (!k->pending) { + /* first signal */ + q = &k->info; + } else { + q = alloc_sigqueue(env); + if (!q) + return -EAGAIN; + while (*pq != NULL) + pq = &(*pq)->next; + } + } + *pq = q; + q->info = *info; + q->next = NULL; + k->pending = 1; + /* signal that a new signal is pending */ + ts->signal_pending = 1; + return 1; /* indicates that the signal was queued */ + } +} + +static void host_signal_handler(int host_signum, siginfo_t *info, + void *puc) +{ + CPUArchState *env = thread_cpu->env_ptr; + int sig; + target_siginfo_t tinfo; + + /* the CPU emulator uses some host signals to detect exceptions, + we forward to it some signals */ + if ((host_signum == SIGSEGV || host_signum == SIGBUS) + && info->si_code > 0) { + if (cpu_signal_handler(host_signum, info, puc)) + return; + } + + /* get target signal number */ + sig = host_to_target_signal(host_signum); + if (sig < 1 || sig > TARGET_NSIG) + return; +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "qemu: got signal %d\n", sig); +#endif + host_to_target_siginfo_noswap(&tinfo, info); + if (queue_signal(env, sig, &tinfo) == 1) { + /* interrupt the virtual CPU as soon as possible */ + cpu_exit(thread_cpu); + } +} + +/* do_sigaltstack() returns target values and errnos. */ +/* compare linux/kernel/signal.c:do_sigaltstack() */ +abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) +{ + int ret; + struct target_sigaltstack oss; + + /* XXX: test errors */ + if(uoss_addr) + { + __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); + __put_user(target_sigaltstack_used.ss_size, &oss.ss_size); + __put_user(sas_ss_flags(sp), &oss.ss_flags); + } + + if(uss_addr) + { + struct target_sigaltstack *uss; + struct target_sigaltstack ss; + size_t minstacksize = TARGET_MINSIGSTKSZ; + +#if defined(TARGET_PPC64) + /* ELF V2 for PPC64 has a 4K minimum stack size for signal handlers */ + struct image_info *image = ((TaskState *)thread_cpu->opaque)->info; + if (get_ppc64_abi(image) > 1) { + minstacksize = 4096; + } +#endif + + ret = -TARGET_EFAULT; + if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) { + goto out; + } + __get_user(ss.ss_sp, &uss->ss_sp); + __get_user(ss.ss_size, &uss->ss_size); + __get_user(ss.ss_flags, &uss->ss_flags); + unlock_user_struct(uss, uss_addr, 0); + + ret = -TARGET_EPERM; + if (on_sig_stack(sp)) + goto out; + + ret = -TARGET_EINVAL; + if (ss.ss_flags != TARGET_SS_DISABLE + && ss.ss_flags != TARGET_SS_ONSTACK + && ss.ss_flags != 0) + goto out; + + if (ss.ss_flags == TARGET_SS_DISABLE) { + ss.ss_size = 0; + ss.ss_sp = 0; + } else { + ret = -TARGET_ENOMEM; + if (ss.ss_size < minstacksize) { + goto out; + } + } + + target_sigaltstack_used.ss_sp = ss.ss_sp; + target_sigaltstack_used.ss_size = ss.ss_size; + } + + if (uoss_addr) { + ret = -TARGET_EFAULT; + if (copy_to_user(uoss_addr, &oss, sizeof(oss))) + goto out; + } + + ret = 0; +out: + return ret; +} + +/* do_sigaction() return host values and errnos */ +int do_sigaction(int sig, const struct target_sigaction *act, + struct target_sigaction *oact) +{ + struct target_sigaction *k; + struct sigaction act1; + int host_sig; + int ret = 0; + + if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) + return -EINVAL; + k = &sigact_table[sig - 1]; +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n", + sig, act, oact); +#endif + if (oact) { + __put_user(k->_sa_handler, &oact->_sa_handler); + __put_user(k->sa_flags, &oact->sa_flags); +#if !defined(TARGET_MIPS) + __put_user(k->sa_restorer, &oact->sa_restorer); +#endif + /* Not swapped. */ + oact->sa_mask = k->sa_mask; + } + if (act) { + /* FIXME: This is not threadsafe. */ + __get_user(k->_sa_handler, &act->_sa_handler); + __get_user(k->sa_flags, &act->sa_flags); +#if !defined(TARGET_MIPS) + __get_user(k->sa_restorer, &act->sa_restorer); +#endif + /* To be swapped in target_to_host_sigset. */ + k->sa_mask = act->sa_mask; + + /* we update the host linux signal state */ + host_sig = target_to_host_signal(sig); + if (host_sig != SIGSEGV && host_sig != SIGBUS) { + sigfillset(&act1.sa_mask); + act1.sa_flags = SA_SIGINFO; + if (k->sa_flags & TARGET_SA_RESTART) + act1.sa_flags |= SA_RESTART; + /* NOTE: it is important to update the host kernel signal + ignore state to avoid getting unexpected interrupted + syscalls */ + if (k->_sa_handler == TARGET_SIG_IGN) { + act1.sa_sigaction = (void *)SIG_IGN; + } else if (k->_sa_handler == TARGET_SIG_DFL) { + if (fatal_signal (sig)) + act1.sa_sigaction = host_signal_handler; + else + act1.sa_sigaction = (void *)SIG_DFL; + } else { + act1.sa_sigaction = host_signal_handler; + } + ret = sigaction(host_sig, &act1, NULL); + } + } + return ret; +} + +#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 + +/* from the Linux kernel */ + +struct target_fpreg { + uint16_t significand[4]; + uint16_t exponent; +}; + +struct target_fpxreg { + uint16_t significand[4]; + uint16_t exponent; + uint16_t padding[3]; +}; + +struct target_xmmreg { + abi_ulong element[4]; +}; + +struct target_fpstate { + /* Regular FPU environment */ + abi_ulong cw; + abi_ulong sw; + abi_ulong tag; + abi_ulong ipoff; + abi_ulong cssel; + abi_ulong dataoff; + abi_ulong datasel; + struct target_fpreg _st[8]; + uint16_t status; + uint16_t magic; /* 0xffff = regular FPU data only */ + + /* FXSR FPU environment */ + abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ + abi_ulong mxcsr; + abi_ulong reserved; + struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ + struct target_xmmreg _xmm[8]; + abi_ulong padding[56]; +}; + +#define X86_FXSR_MAGIC 0x0000 + +struct target_sigcontext { + uint16_t gs, __gsh; + uint16_t fs, __fsh; + uint16_t es, __esh; + uint16_t ds, __dsh; + abi_ulong edi; + abi_ulong esi; + abi_ulong ebp; + abi_ulong esp; + abi_ulong ebx; + abi_ulong edx; + abi_ulong ecx; + abi_ulong eax; + abi_ulong trapno; + abi_ulong err; + abi_ulong eip; + uint16_t cs, __csh; + abi_ulong eflags; + abi_ulong esp_at_signal; + uint16_t ss, __ssh; + abi_ulong fpstate; /* pointer */ + abi_ulong oldmask; + abi_ulong cr2; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct sigframe +{ + abi_ulong pretcode; + int sig; + struct target_sigcontext sc; + struct target_fpstate fpstate; + abi_ulong extramask[TARGET_NSIG_WORDS-1]; + char retcode[8]; +}; + +struct rt_sigframe +{ + abi_ulong pretcode; + int sig; + abi_ulong pinfo; + abi_ulong puc; + struct target_siginfo info; + struct target_ucontext uc; + struct target_fpstate fpstate; + char retcode[8]; +}; + +/* + * Set up a signal frame. + */ + +/* XXX: save x87 state */ +static void setup_sigcontext(struct target_sigcontext *sc, + struct target_fpstate *fpstate, CPUX86State *env, abi_ulong mask, + abi_ulong fpstate_addr) +{ + CPUState *cs = CPU(x86_env_get_cpu(env)); + uint16_t magic; + + /* already locked in setup_frame() */ + __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); + __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); + __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); + __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); + __put_user(env->regs[R_EDI], &sc->edi); + __put_user(env->regs[R_ESI], &sc->esi); + __put_user(env->regs[R_EBP], &sc->ebp); + __put_user(env->regs[R_ESP], &sc->esp); + __put_user(env->regs[R_EBX], &sc->ebx); + __put_user(env->regs[R_EDX], &sc->edx); + __put_user(env->regs[R_ECX], &sc->ecx); + __put_user(env->regs[R_EAX], &sc->eax); + __put_user(cs->exception_index, &sc->trapno); + __put_user(env->error_code, &sc->err); + __put_user(env->eip, &sc->eip); + __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); + __put_user(env->eflags, &sc->eflags); + __put_user(env->regs[R_ESP], &sc->esp_at_signal); + __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); + + cpu_x86_fsave(env, fpstate_addr, 1); + fpstate->status = fpstate->sw; + magic = 0xffff; + __put_user(magic, &fpstate->magic); + __put_user(fpstate_addr, &sc->fpstate); + + /* non-iBCS2 extensions.. */ + __put_user(mask, &sc->oldmask); + __put_user(env->cr[2], &sc->cr2); +} + +/* + * Determine which stack to use.. + */ + +static inline abi_ulong +get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size) +{ + unsigned long esp; + + /* Default to using normal stack */ + esp = env->regs[R_ESP]; + /* This is the X/Open sanctioned signal stack switching. */ + if (ka->sa_flags & TARGET_SA_ONSTACK) { + if (sas_ss_flags(esp) == 0) + esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + /* This is the legacy signal stack switching. */ + else + if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && + !(ka->sa_flags & TARGET_SA_RESTORER) && + ka->sa_restorer) { + esp = (unsigned long) ka->sa_restorer; + } + return (esp - frame_size) & -8ul; +} + +/* compare linux/arch/i386/kernel/signal.c:setup_frame() */ +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUX86State *env) +{ + abi_ulong frame_addr; + struct sigframe *frame; + int i; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + __put_user(sig, &frame->sig); + + setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0], + frame_addr + offsetof(struct sigframe, fpstate)); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + __put_user(ka->sa_restorer, &frame->pretcode); + } else { + uint16_t val16; + abi_ulong retcode_addr; + retcode_addr = frame_addr + offsetof(struct sigframe, retcode); + __put_user(retcode_addr, &frame->pretcode); + /* This is popl %eax ; movl $,%eax ; int $0x80 */ + val16 = 0xb858; + __put_user(val16, (uint16_t *)(frame->retcode+0)); + __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); + val16 = 0x80cd; + __put_user(val16, (uint16_t *)(frame->retcode+6)); + } + + + /* Set up registers for signal handler */ + env->regs[R_ESP] = frame_addr; + env->eip = ka->_sa_handler; + + cpu_x86_load_seg(env, R_DS, __USER_DS); + cpu_x86_load_seg(env, R_ES, __USER_DS); + cpu_x86_load_seg(env, R_SS, __USER_DS); + cpu_x86_load_seg(env, R_CS, __USER_CS); + env->eflags &= ~TF_MASK; + + unlock_user_struct(frame, frame_addr, 1); + + return; + +give_sigsegv: + if (sig == TARGET_SIGSEGV) + ka->_sa_handler = TARGET_SIG_DFL; + force_sig(TARGET_SIGSEGV /* , current */); +} + +/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */ +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUX86State *env) +{ + abi_ulong frame_addr, addr; + struct rt_sigframe *frame; + int i; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + __put_user(sig, &frame->sig); + addr = frame_addr + offsetof(struct rt_sigframe, info); + __put_user(addr, &frame->pinfo); + addr = frame_addr + offsetof(struct rt_sigframe, uc); + __put_user(addr, &frame->puc); + tswap_siginfo(&frame->info, info); + + /* Create the ucontext. */ + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env, + set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate)); + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + __put_user(ka->sa_restorer, &frame->pretcode); + } else { + uint16_t val16; + addr = frame_addr + offsetof(struct rt_sigframe, retcode); + __put_user(addr, &frame->pretcode); + /* This is movl $,%eax ; int $0x80 */ + __put_user(0xb8, (char *)(frame->retcode+0)); + __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); + val16 = 0x80cd; + __put_user(val16, (uint16_t *)(frame->retcode+5)); + } + + /* Set up registers for signal handler */ + env->regs[R_ESP] = frame_addr; + env->eip = ka->_sa_handler; + + cpu_x86_load_seg(env, R_DS, __USER_DS); + cpu_x86_load_seg(env, R_ES, __USER_DS); + cpu_x86_load_seg(env, R_SS, __USER_DS); + cpu_x86_load_seg(env, R_CS, __USER_CS); + env->eflags &= ~TF_MASK; + + unlock_user_struct(frame, frame_addr, 1); + + return; + +give_sigsegv: + if (sig == TARGET_SIGSEGV) + ka->_sa_handler = TARGET_SIG_DFL; + force_sig(TARGET_SIGSEGV /* , current */); +} + +static int +restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) +{ + unsigned int err = 0; + abi_ulong fpstate_addr; + unsigned int tmpflags; + + cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); + cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); + cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); + cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); + + env->regs[R_EDI] = tswapl(sc->edi); + env->regs[R_ESI] = tswapl(sc->esi); + env->regs[R_EBP] = tswapl(sc->ebp); + env->regs[R_ESP] = tswapl(sc->esp); + env->regs[R_EBX] = tswapl(sc->ebx); + env->regs[R_EDX] = tswapl(sc->edx); + env->regs[R_ECX] = tswapl(sc->ecx); + env->eip = tswapl(sc->eip); + + cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3); + cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3); + + tmpflags = tswapl(sc->eflags); + env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); + // regs->orig_eax = -1; /* disable syscall checks */ + + fpstate_addr = tswapl(sc->fpstate); + if (fpstate_addr != 0) { + if (!access_ok(VERIFY_READ, fpstate_addr, + sizeof(struct target_fpstate))) + goto badframe; + cpu_x86_frstor(env, fpstate_addr, 1); + } + + *peax = tswapl(sc->eax); + return err; +badframe: + return 1; +} + +long do_sigreturn(CPUX86State *env) +{ + struct sigframe *frame; + abi_ulong frame_addr = env->regs[R_ESP] - 8; + target_sigset_t target_set; + sigset_t set; + int eax, i; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "do_sigreturn\n"); +#endif + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + /* set blocked signals */ + __get_user(target_set.sig[0], &frame->sc.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + /* restore registers */ + if (restore_sigcontext(env, &frame->sc, &eax)) + goto badframe; + unlock_user_struct(frame, frame_addr, 0); + return eax; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +long do_rt_sigreturn(CPUX86State *env) +{ + abi_ulong frame_addr; + struct rt_sigframe *frame; + sigset_t set; + int eax; + + frame_addr = env->regs[R_ESP] - 4; + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + target_to_host_sigset(&set, &frame->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax)) + goto badframe; + + if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, + get_sp_from_cpustate(env)) == -EFAULT) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return eax; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +#elif defined(TARGET_AARCH64) + +struct target_sigcontext { + uint64_t fault_address; + /* AArch64 registers */ + uint64_t regs[31]; + uint64_t sp; + uint64_t pc; + uint64_t pstate; + /* 4K reserved for FP/SIMD state and future expansion */ + char __reserved[4096] __attribute__((__aligned__(16))); +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + target_sigset_t tuc_sigmask; + /* glibc uses a 1024-bit sigset_t */ + char __unused[1024 / 8 - sizeof(target_sigset_t)]; + /* last for future expansion */ + struct target_sigcontext tuc_mcontext; +}; + +/* + * Header to be used at the beginning of structures extending the user + * context. Such structures must be placed after the rt_sigframe on the stack + * and be 16-byte aligned. The last structure must be a dummy one with the + * magic and size set to 0. + */ +struct target_aarch64_ctx { + uint32_t magic; + uint32_t size; +}; + +#define TARGET_FPSIMD_MAGIC 0x46508001 + +struct target_fpsimd_context { + struct target_aarch64_ctx head; + uint32_t fpsr; + uint32_t fpcr; + uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */ +}; + +/* + * Auxiliary context saved in the sigcontext.__reserved array. Not exported to + * user space as it will change with the addition of new context. User space + * should check the magic/size information. + */ +struct target_aux_context { + struct target_fpsimd_context fpsimd; + /* additional context to be added before "end" */ + struct target_aarch64_ctx end; +}; + +struct target_rt_sigframe { + struct target_siginfo info; + struct target_ucontext uc; + uint64_t fp; + uint64_t lr; + uint32_t tramp[2]; +}; + +static int target_setup_sigframe(struct target_rt_sigframe *sf, + CPUARMState *env, target_sigset_t *set) +{ + int i; + struct target_aux_context *aux = + (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved; + + /* set up the stack frame for unwinding */ + __put_user(env->xregs[29], &sf->fp); + __put_user(env->xregs[30], &sf->lr); + + for (i = 0; i < 31; i++) { + __put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]); + } + __put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp); + __put_user(env->pc, &sf->uc.tuc_mcontext.pc); + __put_user(pstate_read(env), &sf->uc.tuc_mcontext.pstate); + + __put_user(env->exception.vaddress, &sf->uc.tuc_mcontext.fault_address); + + for (i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &sf->uc.tuc_sigmask.sig[i]); + } + + for (i = 0; i < 32; i++) { +#ifdef TARGET_WORDS_BIGENDIAN + __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]); + __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]); +#else + __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]); + __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]); +#endif + } + __put_user(vfp_get_fpsr(env), &aux->fpsimd.fpsr); + __put_user(vfp_get_fpcr(env), &aux->fpsimd.fpcr); + __put_user(TARGET_FPSIMD_MAGIC, &aux->fpsimd.head.magic); + __put_user(sizeof(struct target_fpsimd_context), + &aux->fpsimd.head.size); + + /* set the "end" magic */ + __put_user(0, &aux->end.magic); + __put_user(0, &aux->end.size); + + return 0; +} + +static int target_restore_sigframe(CPUARMState *env, + struct target_rt_sigframe *sf) +{ + sigset_t set; + int i; + struct target_aux_context *aux = + (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved; + uint32_t magic, size, fpsr, fpcr; + uint64_t pstate; + + target_to_host_sigset(&set, &sf->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + for (i = 0; i < 31; i++) { + __get_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]); + } + + __get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp); + __get_user(env->pc, &sf->uc.tuc_mcontext.pc); + __get_user(pstate, &sf->uc.tuc_mcontext.pstate); + pstate_write(env, pstate); + + __get_user(magic, &aux->fpsimd.head.magic); + __get_user(size, &aux->fpsimd.head.size); + + if (magic != TARGET_FPSIMD_MAGIC + || size != sizeof(struct target_fpsimd_context)) { + return 1; + } + + for (i = 0; i < 32; i++) { +#ifdef TARGET_WORDS_BIGENDIAN + __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]); + __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]); +#else + __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]); + __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]); +#endif + } + __get_user(fpsr, &aux->fpsimd.fpsr); + vfp_set_fpsr(env, fpsr); + __get_user(fpcr, &aux->fpsimd.fpcr); + vfp_set_fpcr(env, fpcr); + + return 0; +} + +static abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *env) +{ + abi_ulong sp; + + sp = env->xregs[31]; + + /* + * This is the X/Open sanctioned signal stack switching. + */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + sp = (sp - sizeof(struct target_rt_sigframe)) & ~15; + + return sp; +} + +static void target_setup_frame(int usig, struct target_sigaction *ka, + target_siginfo_t *info, target_sigset_t *set, + CPUARMState *env) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr, return_addr; + + frame_addr = get_sigframe(ka, env); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + + __put_user(target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->xregs[31]), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + target_setup_sigframe(frame, env, set); + if (ka->sa_flags & TARGET_SA_RESTORER) { + return_addr = ka->sa_restorer; + } else { + /* mov x8,#__NR_rt_sigreturn; svc #0 */ + __put_user(0xd2801168, &frame->tramp[0]); + __put_user(0xd4000001, &frame->tramp[1]); + return_addr = frame_addr + offsetof(struct target_rt_sigframe, tramp); + } + env->xregs[0] = usig; + env->xregs[31] = frame_addr; + env->xregs[29] = env->xregs[31] + offsetof(struct target_rt_sigframe, fp); + env->pc = ka->_sa_handler; + env->xregs[30] = return_addr; + if (info) { + tswap_siginfo(&frame->info, info); + env->xregs[1] = frame_addr + offsetof(struct target_rt_sigframe, info); + env->xregs[2] = frame_addr + offsetof(struct target_rt_sigframe, uc); + } + + unlock_user_struct(frame, frame_addr, 1); + return; + + give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, target_sigset_t *set, + CPUARMState *env) +{ + target_setup_frame(sig, ka, info, set, env); +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUARMState *env) +{ + target_setup_frame(sig, ka, 0, set, env); +} + +long do_rt_sigreturn(CPUARMState *env) +{ + struct target_rt_sigframe *frame = NULL; + abi_ulong frame_addr = env->xregs[31]; + + if (frame_addr & 15) { + goto badframe; + } + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { + goto badframe; + } + + if (target_restore_sigframe(env, frame)) { + goto badframe; + } + + if (do_sigaltstack(frame_addr + + offsetof(struct target_rt_sigframe, uc.tuc_stack), + 0, get_sp_from_cpustate(env)) == -EFAULT) { + goto badframe; + } + + unlock_user_struct(frame, frame_addr, 0); + return env->xregs[0]; + + badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +long do_sigreturn(CPUARMState *env) +{ + return do_rt_sigreturn(env); +} + +#elif defined(TARGET_ARM) + +struct target_sigcontext { + abi_ulong trap_no; + abi_ulong error_code; + abi_ulong oldmask; + abi_ulong arm_r0; + abi_ulong arm_r1; + abi_ulong arm_r2; + abi_ulong arm_r3; + abi_ulong arm_r4; + abi_ulong arm_r5; + abi_ulong arm_r6; + abi_ulong arm_r7; + abi_ulong arm_r8; + abi_ulong arm_r9; + abi_ulong arm_r10; + abi_ulong arm_fp; + abi_ulong arm_ip; + abi_ulong arm_sp; + abi_ulong arm_lr; + abi_ulong arm_pc; + abi_ulong arm_cpsr; + abi_ulong fault_address; +}; + +struct target_ucontext_v1 { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct target_ucontext_v2 { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ + char __unused[128 - sizeof(target_sigset_t)]; + abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); +}; + +struct target_user_vfp { + uint64_t fpregs[32]; + abi_ulong fpscr; +}; + +struct target_user_vfp_exc { + abi_ulong fpexc; + abi_ulong fpinst; + abi_ulong fpinst2; +}; + +struct target_vfp_sigframe { + abi_ulong magic; + abi_ulong size; + struct target_user_vfp ufp; + struct target_user_vfp_exc ufp_exc; +} __attribute__((__aligned__(8))); + +struct target_iwmmxt_sigframe { + abi_ulong magic; + abi_ulong size; + uint64_t regs[16]; + /* Note that not all the coprocessor control registers are stored here */ + uint32_t wcssf; + uint32_t wcasf; + uint32_t wcgr0; + uint32_t wcgr1; + uint32_t wcgr2; + uint32_t wcgr3; +} __attribute__((__aligned__(8))); + +#define TARGET_VFP_MAGIC 0x56465001 +#define TARGET_IWMMXT_MAGIC 0x12ef842a + +struct sigframe_v1 +{ + struct target_sigcontext sc; + abi_ulong extramask[TARGET_NSIG_WORDS-1]; + abi_ulong retcode; +}; + +struct sigframe_v2 +{ + struct target_ucontext_v2 uc; + abi_ulong retcode; +}; + +struct rt_sigframe_v1 +{ + abi_ulong pinfo; + abi_ulong puc; + struct target_siginfo info; + struct target_ucontext_v1 uc; + abi_ulong retcode; +}; + +struct rt_sigframe_v2 +{ + struct target_siginfo info; + struct target_ucontext_v2 uc; + abi_ulong retcode; +}; + +#define TARGET_CONFIG_CPU_32 1 + +/* + * For ARM syscalls, we encode the syscall number into the instruction. + */ +#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) +#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) + +/* + * For Thumb syscalls, we pass the syscall number via r7. We therefore + * need two 16-bit instructions. + */ +#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) +#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) + +static const abi_ulong retcodes[4] = { + SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, + SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN +}; + + +static inline int valid_user_regs(CPUARMState *regs) +{ + return 1; +} + +static void +setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ + CPUARMState *env, abi_ulong mask) +{ + __put_user(env->regs[0], &sc->arm_r0); + __put_user(env->regs[1], &sc->arm_r1); + __put_user(env->regs[2], &sc->arm_r2); + __put_user(env->regs[3], &sc->arm_r3); + __put_user(env->regs[4], &sc->arm_r4); + __put_user(env->regs[5], &sc->arm_r5); + __put_user(env->regs[6], &sc->arm_r6); + __put_user(env->regs[7], &sc->arm_r7); + __put_user(env->regs[8], &sc->arm_r8); + __put_user(env->regs[9], &sc->arm_r9); + __put_user(env->regs[10], &sc->arm_r10); + __put_user(env->regs[11], &sc->arm_fp); + __put_user(env->regs[12], &sc->arm_ip); + __put_user(env->regs[13], &sc->arm_sp); + __put_user(env->regs[14], &sc->arm_lr); + __put_user(env->regs[15], &sc->arm_pc); +#ifdef TARGET_CONFIG_CPU_32 + __put_user(cpsr_read(env), &sc->arm_cpsr); +#endif + + __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); + __put_user(/* current->thread.error_code */ 0, &sc->error_code); + __put_user(/* current->thread.address */ 0, &sc->fault_address); + __put_user(mask, &sc->oldmask); +} + +static inline abi_ulong +get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize) +{ + unsigned long sp = regs->regs[13]; + + /* + * This is the X/Open sanctioned signal stack switching. + */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + /* + * ATPCS B01 mandates 8-byte alignment + */ + return (sp - framesize) & ~7; +} + +static void +setup_return(CPUARMState *env, struct target_sigaction *ka, + abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) +{ + abi_ulong handler = ka->_sa_handler; + abi_ulong retcode; + int thumb = handler & 1; + uint32_t cpsr = cpsr_read(env); + + cpsr &= ~CPSR_IT; + if (thumb) { + cpsr |= CPSR_T; + } else { + cpsr &= ~CPSR_T; + } + + if (ka->sa_flags & TARGET_SA_RESTORER) { + retcode = ka->sa_restorer; + } else { + unsigned int idx = thumb; + + if (ka->sa_flags & TARGET_SA_SIGINFO) + idx += 2; + + __put_user(retcodes[idx], rc); + + retcode = rc_addr + thumb; + } + + env->regs[0] = usig; + env->regs[13] = frame_addr; + env->regs[14] = retcode; + env->regs[15] = handler & (thumb ? ~1 : ~3); + cpsr_write(env, cpsr, 0xffffffff); +} + +static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env) +{ + int i; + struct target_vfp_sigframe *vfpframe; + vfpframe = (struct target_vfp_sigframe *)regspace; + __put_user(TARGET_VFP_MAGIC, &vfpframe->magic); + __put_user(sizeof(*vfpframe), &vfpframe->size); + for (i = 0; i < 32; i++) { + __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); + } + __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr); + __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc); + __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); + __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); + return (abi_ulong*)(vfpframe+1); +} + +static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, + CPUARMState *env) +{ + int i; + struct target_iwmmxt_sigframe *iwmmxtframe; + iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; + __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic); + __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size); + for (i = 0; i < 16; i++) { + __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); + } + __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); + __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); + __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); + __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); + __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); + __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); + return (abi_ulong*)(iwmmxtframe+1); +} + +static void setup_sigframe_v2(struct target_ucontext_v2 *uc, + target_sigset_t *set, CPUARMState *env) +{ + struct target_sigaltstack stack; + int i; + abi_ulong *regspace; + + /* Clear all the bits of the ucontext we don't use. */ + memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); + + memset(&stack, 0, sizeof(stack)); + __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); + __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); + memcpy(&uc->tuc_stack, &stack, sizeof(stack)); + + setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); + /* Save coprocessor signal frame. */ + regspace = uc->tuc_regspace; + if (arm_feature(env, ARM_FEATURE_VFP)) { + regspace = setup_sigframe_v2_vfp(regspace, env); + } + if (arm_feature(env, ARM_FEATURE_IWMMXT)) { + regspace = setup_sigframe_v2_iwmmxt(regspace, env); + } + + /* Write terminating magic word */ + __put_user(0, regspace); + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); + } +} + +/* compare linux/arch/arm/kernel/signal.c:setup_frame() */ +static void setup_frame_v1(int usig, struct target_sigaction *ka, + target_sigset_t *set, CPUARMState *regs) +{ + struct sigframe_v1 *frame; + abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); + int i; + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + return; + + setup_sigcontext(&frame->sc, regs, set->sig[0]); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + setup_return(regs, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct sigframe_v1, retcode)); + + unlock_user_struct(frame, frame_addr, 1); +} + +static void setup_frame_v2(int usig, struct target_sigaction *ka, + target_sigset_t *set, CPUARMState *regs) +{ + struct sigframe_v2 *frame; + abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + return; + + setup_sigframe_v2(&frame->uc, set, regs); + + setup_return(regs, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct sigframe_v2, retcode)); + + unlock_user_struct(frame, frame_addr, 1); +} + +static void setup_frame(int usig, struct target_sigaction *ka, + target_sigset_t *set, CPUARMState *regs) +{ + if (get_osversion() >= 0x020612) { + setup_frame_v2(usig, ka, set, regs); + } else { + setup_frame_v1(usig, ka, set, regs); + } +} + +/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ +static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUARMState *env) +{ + struct rt_sigframe_v1 *frame; + abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); + struct target_sigaltstack stack; + int i; + abi_ulong info_addr, uc_addr; + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + return /* 1 */; + + info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); + __put_user(info_addr, &frame->pinfo); + uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); + __put_user(uc_addr, &frame->puc); + tswap_siginfo(&frame->info, info); + + /* Clear all the bits of the ucontext we don't use. */ + memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); + + memset(&stack, 0, sizeof(stack)); + __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); + __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); + memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); + + setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); + } + + setup_return(env, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v1, retcode)); + + env->regs[1] = info_addr; + env->regs[2] = uc_addr; + + unlock_user_struct(frame, frame_addr, 1); +} + +static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUARMState *env) +{ + struct rt_sigframe_v2 *frame; + abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); + abi_ulong info_addr, uc_addr; + + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + return /* 1 */; + + info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); + uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); + tswap_siginfo(&frame->info, info); + + setup_sigframe_v2(&frame->uc, set, env); + + setup_return(env, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v2, retcode)); + + env->regs[1] = info_addr; + env->regs[2] = uc_addr; + + unlock_user_struct(frame, frame_addr, 1); +} + +static void setup_rt_frame(int usig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUARMState *env) +{ + if (get_osversion() >= 0x020612) { + setup_rt_frame_v2(usig, ka, info, set, env); + } else { + setup_rt_frame_v1(usig, ka, info, set, env); + } +} + +static int +restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc) +{ + int err = 0; + uint32_t cpsr; + + __get_user(env->regs[0], &sc->arm_r0); + __get_user(env->regs[1], &sc->arm_r1); + __get_user(env->regs[2], &sc->arm_r2); + __get_user(env->regs[3], &sc->arm_r3); + __get_user(env->regs[4], &sc->arm_r4); + __get_user(env->regs[5], &sc->arm_r5); + __get_user(env->regs[6], &sc->arm_r6); + __get_user(env->regs[7], &sc->arm_r7); + __get_user(env->regs[8], &sc->arm_r8); + __get_user(env->regs[9], &sc->arm_r9); + __get_user(env->regs[10], &sc->arm_r10); + __get_user(env->regs[11], &sc->arm_fp); + __get_user(env->regs[12], &sc->arm_ip); + __get_user(env->regs[13], &sc->arm_sp); + __get_user(env->regs[14], &sc->arm_lr); + __get_user(env->regs[15], &sc->arm_pc); +#ifdef TARGET_CONFIG_CPU_32 + __get_user(cpsr, &sc->arm_cpsr); + cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); +#endif + + err |= !valid_user_regs(env); + + return err; +} + +static long do_sigreturn_v1(CPUARMState *env) +{ + abi_ulong frame_addr; + struct sigframe_v1 *frame = NULL; + target_sigset_t set; + sigset_t host_set; + int i; + + /* + * Since we stacked the signal on a 64-bit boundary, + * then 'sp' should be word aligned here. If it's + * not, then the user is trying to mess with us. + */ + frame_addr = env->regs[13]; + if (frame_addr & 7) { + goto badframe; + } + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + __get_user(set.sig[0], &frame->sc.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(set.sig[i], &frame->extramask[i - 1]); + } + + target_to_host_sigset_internal(&host_set, &set); + do_sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (restore_sigcontext(env, &frame->sc)) + goto badframe; + +#if 0 + /* Send SIGTRAP if we're single-stepping */ + if (ptrace_cancel_bpt(current)) + send_sig(SIGTRAP, current, 1); +#endif + unlock_user_struct(frame, frame_addr, 0); + return env->regs[0]; + +badframe: + force_sig(TARGET_SIGSEGV /* , current */); + return 0; +} + +static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace) +{ + int i; + abi_ulong magic, sz; + uint32_t fpscr, fpexc; + struct target_vfp_sigframe *vfpframe; + vfpframe = (struct target_vfp_sigframe *)regspace; + + __get_user(magic, &vfpframe->magic); + __get_user(sz, &vfpframe->size); + if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) { + return 0; + } + for (i = 0; i < 32; i++) { + __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); + } + __get_user(fpscr, &vfpframe->ufp.fpscr); + vfp_set_fpscr(env, fpscr); + __get_user(fpexc, &vfpframe->ufp_exc.fpexc); + /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid + * and the exception flag is cleared + */ + fpexc |= (1 << 30); + fpexc &= ~((1 << 31) | (1 << 28)); + env->vfp.xregs[ARM_VFP_FPEXC] = fpexc; + __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); + __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); + return (abi_ulong*)(vfpframe + 1); +} + +static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env, + abi_ulong *regspace) +{ + int i; + abi_ulong magic, sz; + struct target_iwmmxt_sigframe *iwmmxtframe; + iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; + + __get_user(magic, &iwmmxtframe->magic); + __get_user(sz, &iwmmxtframe->size); + if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) { + return 0; + } + for (i = 0; i < 16; i++) { + __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); + } + __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); + __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); + __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); + __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); + __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); + __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); + return (abi_ulong*)(iwmmxtframe + 1); +} + +static int do_sigframe_return_v2(CPUARMState *env, target_ulong frame_addr, + struct target_ucontext_v2 *uc) +{ + sigset_t host_set; + abi_ulong *regspace; + + target_to_host_sigset(&host_set, &uc->tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (restore_sigcontext(env, &uc->tuc_mcontext)) + return 1; + + /* Restore coprocessor signal frame */ + regspace = uc->tuc_regspace; + if (arm_feature(env, ARM_FEATURE_VFP)) { + regspace = restore_sigframe_v2_vfp(env, regspace); + if (!regspace) { + return 1; + } + } + if (arm_feature(env, ARM_FEATURE_IWMMXT)) { + regspace = restore_sigframe_v2_iwmmxt(env, regspace); + if (!regspace) { + return 1; + } + } + + if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) + return 1; + +#if 0 + /* Send SIGTRAP if we're single-stepping */ + if (ptrace_cancel_bpt(current)) + send_sig(SIGTRAP, current, 1); +#endif + + return 0; +} + +static long do_sigreturn_v2(CPUARMState *env) +{ + abi_ulong frame_addr; + struct sigframe_v2 *frame = NULL; + + /* + * Since we stacked the signal on a 64-bit boundary, + * then 'sp' should be word aligned here. If it's + * not, then the user is trying to mess with us. + */ + frame_addr = env->regs[13]; + if (frame_addr & 7) { + goto badframe; + } + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[0]; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV /* , current */); + return 0; +} + +long do_sigreturn(CPUARMState *env) +{ + if (get_osversion() >= 0x020612) { + return do_sigreturn_v2(env); + } else { + return do_sigreturn_v1(env); + } +} + +static long do_rt_sigreturn_v1(CPUARMState *env) +{ + abi_ulong frame_addr; + struct rt_sigframe_v1 *frame = NULL; + sigset_t host_set; + + /* + * Since we stacked the signal on a 64-bit boundary, + * then 'sp' should be word aligned here. If it's + * not, then the user is trying to mess with us. + */ + frame_addr = env->regs[13]; + if (frame_addr & 7) { + goto badframe; + } + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) + goto badframe; + + if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) + goto badframe; + +#if 0 + /* Send SIGTRAP if we're single-stepping */ + if (ptrace_cancel_bpt(current)) + send_sig(SIGTRAP, current, 1); +#endif + unlock_user_struct(frame, frame_addr, 0); + return env->regs[0]; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV /* , current */); + return 0; +} + +static long do_rt_sigreturn_v2(CPUARMState *env) +{ + abi_ulong frame_addr; + struct rt_sigframe_v2 *frame = NULL; + + /* + * Since we stacked the signal on a 64-bit boundary, + * then 'sp' should be word aligned here. If it's + * not, then the user is trying to mess with us. + */ + frame_addr = env->regs[13]; + if (frame_addr & 7) { + goto badframe; + } + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[0]; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV /* , current */); + return 0; +} + +long do_rt_sigreturn(CPUARMState *env) +{ + if (get_osversion() >= 0x020612) { + return do_rt_sigreturn_v2(env); + } else { + return do_rt_sigreturn_v1(env); + } +} + +#elif defined(TARGET_SPARC) + +#define __SUNOS_MAXWIN 31 + +/* This is what SunOS does, so shall I. */ +struct target_sigcontext { + abi_ulong sigc_onstack; /* state to restore */ + + abi_ulong sigc_mask; /* sigmask to restore */ + abi_ulong sigc_sp; /* stack pointer */ + abi_ulong sigc_pc; /* program counter */ + abi_ulong sigc_npc; /* next program counter */ + abi_ulong sigc_psr; /* for condition codes etc */ + abi_ulong sigc_g1; /* User uses these two registers */ + abi_ulong sigc_o0; /* within the trampoline code. */ + + /* Now comes information regarding the users window set + * at the time of the signal. + */ + abi_ulong sigc_oswins; /* outstanding windows */ + + /* stack ptrs for each regwin buf */ + char *sigc_spbuf[__SUNOS_MAXWIN]; + + /* Windows to restore after signal */ + struct { + abi_ulong locals[8]; + abi_ulong ins[8]; + } sigc_wbuf[__SUNOS_MAXWIN]; +}; +/* A Sparc stack frame */ +struct sparc_stackf { + abi_ulong locals[8]; + abi_ulong ins[8]; + /* It's simpler to treat fp and callers_pc as elements of ins[] + * since we never need to access them ourselves. + */ + char *structptr; + abi_ulong xargs[6]; + abi_ulong xxargs[1]; +}; + +typedef struct { + struct { + abi_ulong psr; + abi_ulong pc; + abi_ulong npc; + abi_ulong y; + abi_ulong u_regs[16]; /* globals and ins */ + } si_regs; + int si_mask; +} __siginfo_t; + +typedef struct { + abi_ulong si_float_regs[32]; + unsigned long si_fsr; + unsigned long si_fpqdepth; + struct { + unsigned long *insn_addr; + unsigned long insn; + } si_fpqueue [16]; +} qemu_siginfo_fpu_t; + + +struct target_signal_frame { + struct sparc_stackf ss; + __siginfo_t info; + abi_ulong fpu_save; + abi_ulong insns[2] __attribute__ ((aligned (8))); + abi_ulong extramask[TARGET_NSIG_WORDS - 1]; + abi_ulong extra_size; /* Should be 0 */ + qemu_siginfo_fpu_t fpu_state; +}; +struct target_rt_signal_frame { + struct sparc_stackf ss; + siginfo_t info; + abi_ulong regs[20]; + sigset_t mask; + abi_ulong fpu_save; + unsigned int insns[2]; + stack_t stack; + unsigned int extra_size; /* Should be 0 */ + qemu_siginfo_fpu_t fpu_state; +}; + +#define UREG_O0 16 +#define UREG_O6 22 +#define UREG_I0 0 +#define UREG_I1 1 +#define UREG_I2 2 +#define UREG_I3 3 +#define UREG_I4 4 +#define UREG_I5 5 +#define UREG_I6 6 +#define UREG_I7 7 +#define UREG_L0 8 +#define UREG_FP UREG_I6 +#define UREG_SP UREG_O6 + +static inline abi_ulong get_sigframe(struct target_sigaction *sa, + CPUSPARCState *env, + unsigned long framesize) +{ + abi_ulong sp; + + sp = env->regwptr[UREG_FP]; + + /* This is the X/Open sanctioned signal stack switching. */ + if (sa->sa_flags & TARGET_SA_ONSTACK) { + if (!on_sig_stack(sp) + && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + return sp - framesize; +} + +static int +setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask) +{ + int err = 0, i; + + __put_user(env->psr, &si->si_regs.psr); + __put_user(env->pc, &si->si_regs.pc); + __put_user(env->npc, &si->si_regs.npc); + __put_user(env->y, &si->si_regs.y); + for (i=0; i < 8; i++) { + __put_user(env->gregs[i], &si->si_regs.u_regs[i]); + } + for (i=0; i < 8; i++) { + __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); + } + __put_user(mask, &si->si_mask); + return err; +} + +#if 0 +static int +setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ + CPUSPARCState *env, unsigned long mask) +{ + int err = 0; + + __put_user(mask, &sc->sigc_mask); + __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); + __put_user(env->pc, &sc->sigc_pc); + __put_user(env->npc, &sc->sigc_npc); + __put_user(env->psr, &sc->sigc_psr); + __put_user(env->gregs[1], &sc->sigc_g1); + __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); + + return err; +} +#endif +#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUSPARCState *env) +{ + abi_ulong sf_addr; + struct target_signal_frame *sf; + int sigframe_size, err, i; + + /* 1. Make sure everything is clean */ + //synchronize_user_stack(); + + sigframe_size = NF_ALIGNEDSZ; + sf_addr = get_sigframe(ka, env, sigframe_size); + + sf = lock_user(VERIFY_WRITE, sf_addr, + sizeof(struct target_signal_frame), 0); + if (!sf) + goto sigsegv; + + //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); +#if 0 + if (invalid_frame_pointer(sf, sigframe_size)) + goto sigill_and_return; +#endif + /* 2. Save the current process state */ + err = setup___siginfo(&sf->info, env, set->sig[0]); + __put_user(0, &sf->extra_size); + + //save_fpu_state(regs, &sf->fpu_state); + //__put_user(&sf->fpu_state, &sf->fpu_save); + + __put_user(set->sig[0], &sf->info.si_mask); + for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { + __put_user(set->sig[i + 1], &sf->extramask[i]); + } + + for (i = 0; i < 8; i++) { + __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); + } + for (i = 0; i < 8; i++) { + __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); + } + if (err) + goto sigsegv; + + /* 3. signal handler back-trampoline and parameters */ + env->regwptr[UREG_FP] = sf_addr; + env->regwptr[UREG_I0] = sig; + env->regwptr[UREG_I1] = sf_addr + + offsetof(struct target_signal_frame, info); + env->regwptr[UREG_I2] = sf_addr + + offsetof(struct target_signal_frame, info); + + /* 4. signal handler */ + env->pc = ka->_sa_handler; + env->npc = (env->pc + 4); + /* 5. return to kernel instructions */ + if (ka->sa_restorer) + env->regwptr[UREG_I7] = ka->sa_restorer; + else { + uint32_t val32; + + env->regwptr[UREG_I7] = sf_addr + + offsetof(struct target_signal_frame, insns) - 2 * 4; + + /* mov __NR_sigreturn, %g1 */ + val32 = 0x821020d8; + __put_user(val32, &sf->insns[0]); + + /* t 0x10 */ + val32 = 0x91d02010; + __put_user(val32, &sf->insns[1]); + if (err) + goto sigsegv; + + /* Flush instruction space. */ + //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); + // tb_flush(CPU(sparc_env_get_cpu(env))); + } + unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); + return; +#if 0 +sigill_and_return: + force_sig(TARGET_SIGILL); +#endif +sigsegv: + //fprintf(stderr, "force_sig\n"); + unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUSPARCState *env) +{ + fprintf(stderr, "setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUSPARCState *env) +{ + abi_ulong sf_addr; + struct target_signal_frame *sf; + uint32_t up_psr, pc, npc; + target_sigset_t set; + sigset_t host_set; + int err=0, i; + + sf_addr = env->regwptr[UREG_FP]; + if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) + goto segv_and_exit; +#if 0 + fprintf(stderr, "sigreturn\n"); + fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); +#endif + //cpu_dump_state(env, stderr, fprintf, 0); + + /* 1. Make sure we are not getting garbage from the user */ + + if (sf_addr & 3) + goto segv_and_exit; + + __get_user(pc, &sf->info.si_regs.pc); + __get_user(npc, &sf->info.si_regs.npc); + + if ((pc | npc) & 3) + goto segv_and_exit; + + /* 2. Restore the state */ + __get_user(up_psr, &sf->info.si_regs.psr); + + /* User can only change condition codes and FPU enabling in %psr. */ + env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) + | (env->psr & ~(PSR_ICC /* | PSR_EF */)); + + env->pc = pc; + env->npc = npc; + __get_user(env->y, &sf->info.si_regs.y); + for (i=0; i < 8; i++) { + __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); + } + for (i=0; i < 8; i++) { + __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); + } + + /* FIXME: implement FPU save/restore: + * __get_user(fpu_save, &sf->fpu_save); + * if (fpu_save) + * err |= restore_fpu_state(env, fpu_save); + */ + + /* This is pretty much atomic, no amount locking would prevent + * the races which exist anyways. + */ + __get_user(set.sig[0], &sf->info.si_mask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(set.sig[i], &sf->extramask[i - 1]); + } + + target_to_host_sigset_internal(&host_set, &set); + do_sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (err) + goto segv_and_exit; + unlock_user_struct(sf, sf_addr, 0); + return env->regwptr[0]; + +segv_and_exit: + unlock_user_struct(sf, sf_addr, 0); + force_sig(TARGET_SIGSEGV); +} + +long do_rt_sigreturn(CPUSPARCState *env) +{ + fprintf(stderr, "do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) +#define MC_TSTATE 0 +#define MC_PC 1 +#define MC_NPC 2 +#define MC_Y 3 +#define MC_G1 4 +#define MC_G2 5 +#define MC_G3 6 +#define MC_G4 7 +#define MC_G5 8 +#define MC_G6 9 +#define MC_G7 10 +#define MC_O0 11 +#define MC_O1 12 +#define MC_O2 13 +#define MC_O3 14 +#define MC_O4 15 +#define MC_O5 16 +#define MC_O6 17 +#define MC_O7 18 +#define MC_NGREG 19 + +typedef abi_ulong target_mc_greg_t; +typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; + +struct target_mc_fq { + abi_ulong *mcfq_addr; + uint32_t mcfq_insn; +}; + +struct target_mc_fpu { + union { + uint32_t sregs[32]; + uint64_t dregs[32]; + //uint128_t qregs[16]; + } mcfpu_fregs; + abi_ulong mcfpu_fsr; + abi_ulong mcfpu_fprs; + abi_ulong mcfpu_gsr; + struct target_mc_fq *mcfpu_fq; + unsigned char mcfpu_qcnt; + unsigned char mcfpu_qentsz; + unsigned char mcfpu_enab; +}; +typedef struct target_mc_fpu target_mc_fpu_t; + +typedef struct { + target_mc_gregset_t mc_gregs; + target_mc_greg_t mc_fp; + target_mc_greg_t mc_i7; + target_mc_fpu_t mc_fpregs; +} target_mcontext_t; + +struct target_ucontext { + struct target_ucontext *tuc_link; + abi_ulong tuc_flags; + target_sigset_t tuc_sigmask; + target_mcontext_t tuc_mcontext; +}; + +/* A V9 register window */ +struct target_reg_window { + abi_ulong locals[8]; + abi_ulong ins[8]; +}; + +#define TARGET_STACK_BIAS 2047 + +/* {set, get}context() needed for 64-bit SparcLinux userland. */ +void sparc64_set_context(CPUSPARCState *env) +{ + abi_ulong ucp_addr; + struct target_ucontext *ucp; + target_mc_gregset_t *grp; + abi_ulong pc, npc, tstate; + abi_ulong fp, i7, w_addr; + unsigned int i; + + ucp_addr = env->regwptr[UREG_I0]; + if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) + goto do_sigsegv; + grp = &ucp->tuc_mcontext.mc_gregs; + __get_user(pc, &((*grp)[MC_PC])); + __get_user(npc, &((*grp)[MC_NPC])); + if ((pc | npc) & 3) + goto do_sigsegv; + if (env->regwptr[UREG_I1]) { + target_sigset_t target_set; + sigset_t set; + + if (TARGET_NSIG_WORDS == 1) { + __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]); + } else { + abi_ulong *src, *dst; + src = ucp->tuc_sigmask.sig; + dst = target_set.sig; + for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) { + __get_user(*dst, src); + } + } + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + } + env->pc = pc; + env->npc = npc; + __get_user(env->y, &((*grp)[MC_Y])); + __get_user(tstate, &((*grp)[MC_TSTATE])); + env->asi = (tstate >> 24) & 0xff; + cpu_put_ccr(env, tstate >> 32); + cpu_put_cwp64(env, tstate & 0x1f); + __get_user(env->gregs[1], (&(*grp)[MC_G1])); + __get_user(env->gregs[2], (&(*grp)[MC_G2])); + __get_user(env->gregs[3], (&(*grp)[MC_G3])); + __get_user(env->gregs[4], (&(*grp)[MC_G4])); + __get_user(env->gregs[5], (&(*grp)[MC_G5])); + __get_user(env->gregs[6], (&(*grp)[MC_G6])); + __get_user(env->gregs[7], (&(*grp)[MC_G7])); + __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); + __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); + __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); + __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); + __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); + __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); + __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); + __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); + + __get_user(fp, &(ucp->tuc_mcontext.mc_fp)); + __get_user(i7, &(ucp->tuc_mcontext.mc_i7)); + + w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; + if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), + abi_ulong) != 0) + goto do_sigsegv; + if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), + abi_ulong) != 0) + goto do_sigsegv; + /* FIXME this does not match how the kernel handles the FPU in + * its sparc64_set_context implementation. In particular the FPU + * is only restored if fenab is non-zero in: + * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab)); + */ + __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs)); + { + uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; + for (i = 0; i < 64; i++, src++) { + if (i & 1) { + __get_user(env->fpr[i/2].l.lower, src); + } else { + __get_user(env->fpr[i/2].l.upper, src); + } + } + } + __get_user(env->fsr, + &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr)); + __get_user(env->gsr, + &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr)); + unlock_user_struct(ucp, ucp_addr, 0); + return; + do_sigsegv: + unlock_user_struct(ucp, ucp_addr, 0); + force_sig(TARGET_SIGSEGV); +} + +void sparc64_get_context(CPUSPARCState *env) +{ + abi_ulong ucp_addr; + struct target_ucontext *ucp; + target_mc_gregset_t *grp; + target_mcontext_t *mcp; + abi_ulong fp, i7, w_addr; + int err; + unsigned int i; + target_sigset_t target_set; + sigset_t set; + + ucp_addr = env->regwptr[UREG_I0]; + if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) + goto do_sigsegv; + + mcp = &ucp->tuc_mcontext; + grp = &mcp->mc_gregs; + + /* Skip over the trap instruction, first. */ + env->pc = env->npc; + env->npc += 4; + + err = 0; + + do_sigprocmask(0, NULL, &set); + host_to_target_sigset_internal(&target_set, &set); + if (TARGET_NSIG_WORDS == 1) { + __put_user(target_set.sig[0], + (abi_ulong *)&ucp->tuc_sigmask); + } else { + abi_ulong *src, *dst; + src = target_set.sig; + dst = ucp->tuc_sigmask.sig; + for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) { + __put_user(*src, dst); + } + if (err) + goto do_sigsegv; + } + + /* XXX: tstate must be saved properly */ + // __put_user(env->tstate, &((*grp)[MC_TSTATE])); + __put_user(env->pc, &((*grp)[MC_PC])); + __put_user(env->npc, &((*grp)[MC_NPC])); + __put_user(env->y, &((*grp)[MC_Y])); + __put_user(env->gregs[1], &((*grp)[MC_G1])); + __put_user(env->gregs[2], &((*grp)[MC_G2])); + __put_user(env->gregs[3], &((*grp)[MC_G3])); + __put_user(env->gregs[4], &((*grp)[MC_G4])); + __put_user(env->gregs[5], &((*grp)[MC_G5])); + __put_user(env->gregs[6], &((*grp)[MC_G6])); + __put_user(env->gregs[7], &((*grp)[MC_G7])); + __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); + __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); + __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); + __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); + __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); + __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); + __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); + __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); + + w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; + fp = i7 = 0; + if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), + abi_ulong) != 0) + goto do_sigsegv; + if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), + abi_ulong) != 0) + goto do_sigsegv; + __put_user(fp, &(mcp->mc_fp)); + __put_user(i7, &(mcp->mc_i7)); + + { + uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; + for (i = 0; i < 64; i++, dst++) { + if (i & 1) { + __put_user(env->fpr[i/2].l.lower, dst); + } else { + __put_user(env->fpr[i/2].l.upper, dst); + } + } + } + __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); + __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); + __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); + + if (err) + goto do_sigsegv; + unlock_user_struct(ucp, ucp_addr, 1); + return; + do_sigsegv: + unlock_user_struct(ucp, ucp_addr, 1); + force_sig(TARGET_SIGSEGV); +} +#endif +#elif defined(TARGET_MIPS) || defined(TARGET_MIPS64) + +# if defined(TARGET_ABI_MIPSO32) +struct target_sigcontext { + uint32_t sc_regmask; /* Unused */ + uint32_t sc_status; + uint64_t sc_pc; + uint64_t sc_regs[32]; + uint64_t sc_fpregs[32]; + uint32_t sc_ownedfp; /* Unused */ + uint32_t sc_fpc_csr; + uint32_t sc_fpc_eir; /* Unused */ + uint32_t sc_used_math; + uint32_t sc_dsp; /* dsp status, was sc_ssflags */ + uint32_t pad0; + uint64_t sc_mdhi; + uint64_t sc_mdlo; + target_ulong sc_hi1; /* Was sc_cause */ + target_ulong sc_lo1; /* Was sc_badvaddr */ + target_ulong sc_hi2; /* Was sc_sigset[4] */ + target_ulong sc_lo2; + target_ulong sc_hi3; + target_ulong sc_lo3; +}; +# else /* N32 || N64 */ +struct target_sigcontext { + uint64_t sc_regs[32]; + uint64_t sc_fpregs[32]; + uint64_t sc_mdhi; + uint64_t sc_hi1; + uint64_t sc_hi2; + uint64_t sc_hi3; + uint64_t sc_mdlo; + uint64_t sc_lo1; + uint64_t sc_lo2; + uint64_t sc_lo3; + uint64_t sc_pc; + uint32_t sc_fpc_csr; + uint32_t sc_used_math; + uint32_t sc_dsp; + uint32_t sc_reserved; +}; +# endif /* O32 */ + +struct sigframe { + uint32_t sf_ass[4]; /* argument save space for o32 */ + uint32_t sf_code[2]; /* signal trampoline */ + struct target_sigcontext sf_sc; + target_sigset_t sf_mask; +}; + +struct target_ucontext { + target_ulong tuc_flags; + target_ulong tuc_link; + target_stack_t tuc_stack; + target_ulong pad0; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; +}; + +struct target_rt_sigframe { + uint32_t rs_ass[4]; /* argument save space for o32 */ + uint32_t rs_code[2]; /* signal trampoline */ + struct target_siginfo rs_info; + struct target_ucontext rs_uc; +}; + +/* Install trampoline to jump back from signal handler */ +static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) +{ + int err = 0; + + /* + * Set up the return code ... + * + * li v0, __NR__foo_sigreturn + * syscall + */ + + __put_user(0x24020000 + syscall, tramp + 0); + __put_user(0x0000000c , tramp + 1); + return err; +} + +static inline void setup_sigcontext(CPUMIPSState *regs, + struct target_sigcontext *sc) +{ + int i; + + __put_user(exception_resume_pc(regs), &sc->sc_pc); + regs->hflags &= ~MIPS_HFLAG_BMASK; + + __put_user(0, &sc->sc_regs[0]); + for (i = 1; i < 32; ++i) { + __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); + } + + __put_user(regs->active_tc.HI[0], &sc->sc_mdhi); + __put_user(regs->active_tc.LO[0], &sc->sc_mdlo); + + /* Rather than checking for dsp existence, always copy. The storage + would just be garbage otherwise. */ + __put_user(regs->active_tc.HI[1], &sc->sc_hi1); + __put_user(regs->active_tc.HI[2], &sc->sc_hi2); + __put_user(regs->active_tc.HI[3], &sc->sc_hi3); + __put_user(regs->active_tc.LO[1], &sc->sc_lo1); + __put_user(regs->active_tc.LO[2], &sc->sc_lo2); + __put_user(regs->active_tc.LO[3], &sc->sc_lo3); + { + uint32_t dsp = cpu_rddsp(0x3ff, regs); + __put_user(dsp, &sc->sc_dsp); + } + + __put_user(1, &sc->sc_used_math); + + for (i = 0; i < 32; ++i) { + __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]); + } +} + +static inline void +restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc) +{ + int i; + + __get_user(regs->CP0_EPC, &sc->sc_pc); + + __get_user(regs->active_tc.HI[0], &sc->sc_mdhi); + __get_user(regs->active_tc.LO[0], &sc->sc_mdlo); + + for (i = 1; i < 32; ++i) { + __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); + } + + __get_user(regs->active_tc.HI[1], &sc->sc_hi1); + __get_user(regs->active_tc.HI[2], &sc->sc_hi2); + __get_user(regs->active_tc.HI[3], &sc->sc_hi3); + __get_user(regs->active_tc.LO[1], &sc->sc_lo1); + __get_user(regs->active_tc.LO[2], &sc->sc_lo2); + __get_user(regs->active_tc.LO[3], &sc->sc_lo3); + { + uint32_t dsp; + __get_user(dsp, &sc->sc_dsp); + cpu_wrdsp(dsp, 0x3ff, regs); + } + + for (i = 0; i < 32; ++i) { + __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]); + } +} + +/* + * Determine which stack to use.. + */ +static inline abi_ulong +get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size) +{ + unsigned long sp; + + /* Default to using normal stack */ + sp = regs->active_tc.gpr[29]; + + /* + * FPU emulator may have its own trampoline active just + * above the user stack, 16-bytes before the next lowest + * 16 byte boundary. Try to avoid trashing it. + */ + sp -= 32; + + /* This is the X/Open sanctioned signal stack switching. */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + return (sp - frame_size) & ~7; +} + +static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env) +{ + if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) { + env->hflags &= ~MIPS_HFLAG_M16; + env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT; + env->active_tc.PC &= ~(target_ulong) 1; + } +} + +# if defined(TARGET_ABI_MIPSO32) +/* compare linux/arch/mips/kernel/signal.c:setup_frame() */ +static void setup_frame(int sig, struct target_sigaction * ka, + target_sigset_t *set, CPUMIPSState *regs) +{ + struct sigframe *frame; + abi_ulong frame_addr; + int i; + + frame_addr = get_sigframe(ka, regs, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); + + setup_sigcontext(regs, &frame->sf_sc); + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->sf_mask.sig[i]); + } + + /* + * Arguments to signal handler: + * + * a0 = signal number + * a1 = 0 (should be cause) + * a2 = pointer to struct sigcontext + * + * $25 and PC point to the signal handler, $29 points to the + * struct sigframe. + */ + regs->active_tc.gpr[ 4] = sig; + regs->active_tc.gpr[ 5] = 0; + regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); + regs->active_tc.gpr[29] = frame_addr; + regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); + /* The original kernel code sets CP0_EPC to the handler + * since it returns to userland using eret + * we cannot do this here, and we must set PC directly */ + regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler; + mips_set_hflags_isa_mode_from_pc(regs); + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + force_sig(TARGET_SIGSEGV/*, current*/); +} + +long do_sigreturn(CPUMIPSState *regs) +{ + struct sigframe *frame; + abi_ulong frame_addr; + sigset_t blocked; + target_sigset_t target_set; + int i; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "do_sigreturn\n"); +#endif + frame_addr = regs->active_tc.gpr[29]; + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->sf_mask.sig[i]); + } + + target_to_host_sigset_internal(&blocked, &target_set); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + + restore_sigcontext(regs, &frame->sf_sc); + +#if 0 + /* + * Don't let your children do this ... + */ + __asm__ __volatile__( + "move\t$29, %0\n\t" + "j\tsyscall_exit" + :/* no outputs */ + :"r" (®s)); + /* Unreached */ +#endif + + regs->active_tc.PC = regs->CP0_EPC; + mips_set_hflags_isa_mode_from_pc(regs); + /* I am not sure this is right, but it seems to work + * maybe a problem with nested signals ? */ + regs->CP0_EPC = 0; + return -TARGET_QEMU_ESIGRETURN; + +badframe: + force_sig(TARGET_SIGSEGV/*, current*/); + return 0; +} +# endif /* O32 */ + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUMIPSState *env) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr; + int i; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); + + tswap_siginfo(&frame->rs_info, info); + + __put_user(0, &frame->rs_uc.tuc_flags); + __put_user(0, &frame->rs_uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); + __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), + &frame->rs_uc.tuc_stack.ss_flags); + + setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]); + } + + /* + * Arguments to signal handler: + * + * a0 = signal number + * a1 = pointer to siginfo_t + * a2 = pointer to struct ucontext + * + * $25 and PC point to the signal handler, $29 points to the + * struct sigframe. + */ + env->active_tc.gpr[ 4] = sig; + env->active_tc.gpr[ 5] = frame_addr + + offsetof(struct target_rt_sigframe, rs_info); + env->active_tc.gpr[ 6] = frame_addr + + offsetof(struct target_rt_sigframe, rs_uc); + env->active_tc.gpr[29] = frame_addr; + env->active_tc.gpr[31] = frame_addr + + offsetof(struct target_rt_sigframe, rs_code); + /* The original kernel code sets CP0_EPC to the handler + * since it returns to userland using eret + * we cannot do this here, and we must set PC directly */ + env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler; + mips_set_hflags_isa_mode_from_pc(env); + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV/*, current*/); +} + +long do_rt_sigreturn(CPUMIPSState *env) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr; + sigset_t blocked; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "do_rt_sigreturn\n"); +#endif + frame_addr = env->active_tc.gpr[29]; + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + + restore_sigcontext(env, &frame->rs_uc.tuc_mcontext); + + if (do_sigaltstack(frame_addr + + offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), + 0, get_sp_from_cpustate(env)) == -EFAULT) + goto badframe; + + env->active_tc.PC = env->CP0_EPC; + mips_set_hflags_isa_mode_from_pc(env); + /* I am not sure this is right, but it seems to work + * maybe a problem with nested signals ? */ + env->CP0_EPC = 0; + return -TARGET_QEMU_ESIGRETURN; + +badframe: + force_sig(TARGET_SIGSEGV/*, current*/); + return 0; +} + +#elif defined(TARGET_SH4) + +/* + * code and data structures from linux kernel: + * include/asm-sh/sigcontext.h + * arch/sh/kernel/signal.c + */ + +struct target_sigcontext { + target_ulong oldmask; + + /* CPU registers */ + target_ulong sc_gregs[16]; + target_ulong sc_pc; + target_ulong sc_pr; + target_ulong sc_sr; + target_ulong sc_gbr; + target_ulong sc_mach; + target_ulong sc_macl; + + /* FPU registers */ + target_ulong sc_fpregs[16]; + target_ulong sc_xfpregs[16]; + unsigned int sc_fpscr; + unsigned int sc_fpul; + unsigned int sc_ownedfp; +}; + +struct target_sigframe +{ + struct target_sigcontext sc; + target_ulong extramask[TARGET_NSIG_WORDS-1]; + uint16_t retcode[3]; +}; + + +struct target_ucontext { + target_ulong tuc_flags; + struct target_ucontext *tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct target_rt_sigframe +{ + struct target_siginfo info; + struct target_ucontext uc; + uint16_t retcode[3]; +}; + + +#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ +#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ + +static abi_ulong get_sigframe(struct target_sigaction *ka, + unsigned long sp, size_t frame_size) +{ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + return (sp - frame_size) & -8ul; +} + +static void setup_sigcontext(struct target_sigcontext *sc, + CPUSH4State *regs, unsigned long mask) +{ + int i; + +#define COPY(x) __put_user(regs->x, &sc->sc_##x) + COPY(gregs[0]); COPY(gregs[1]); + COPY(gregs[2]); COPY(gregs[3]); + COPY(gregs[4]); COPY(gregs[5]); + COPY(gregs[6]); COPY(gregs[7]); + COPY(gregs[8]); COPY(gregs[9]); + COPY(gregs[10]); COPY(gregs[11]); + COPY(gregs[12]); COPY(gregs[13]); + COPY(gregs[14]); COPY(gregs[15]); + COPY(gbr); COPY(mach); + COPY(macl); COPY(pr); + COPY(sr); COPY(pc); +#undef COPY + + for (i=0; i<16; i++) { + __put_user(regs->fregs[i], &sc->sc_fpregs[i]); + } + __put_user(regs->fpscr, &sc->sc_fpscr); + __put_user(regs->fpul, &sc->sc_fpul); + + /* non-iBCS2 extensions.. */ + __put_user(mask, &sc->oldmask); +} + +static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc, + target_ulong *r0_p) +{ + int i; + +#define COPY(x) __get_user(regs->x, &sc->sc_##x) + COPY(gregs[1]); + COPY(gregs[2]); COPY(gregs[3]); + COPY(gregs[4]); COPY(gregs[5]); + COPY(gregs[6]); COPY(gregs[7]); + COPY(gregs[8]); COPY(gregs[9]); + COPY(gregs[10]); COPY(gregs[11]); + COPY(gregs[12]); COPY(gregs[13]); + COPY(gregs[14]); COPY(gregs[15]); + COPY(gbr); COPY(mach); + COPY(macl); COPY(pr); + COPY(sr); COPY(pc); +#undef COPY + + for (i=0; i<16; i++) { + __get_user(regs->fregs[i], &sc->sc_fpregs[i]); + } + __get_user(regs->fpscr, &sc->sc_fpscr); + __get_user(regs->fpul, &sc->sc_fpul); + + regs->tra = -1; /* disable syscall checks */ + __get_user(*r0_p, &sc->sc_gregs[0]); +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUSH4State *regs) +{ + struct target_sigframe *frame; + abi_ulong frame_addr; + int i; + int err = 0; + + frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + setup_sigcontext(&frame->sc, regs, set->sig[0]); + + for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { + __put_user(set->sig[i + 1], &frame->extramask[i]); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + regs->pr = (unsigned long) ka->sa_restorer; + } else { + /* Generate return code (system call to sigreturn) */ + __put_user(MOVW(2), &frame->retcode[0]); + __put_user(TRAP_NOARG, &frame->retcode[1]); + __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); + regs->pr = (unsigned long) frame->retcode; + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->gregs[15] = frame_addr; + regs->gregs[4] = sig; /* Arg for signal handler */ + regs->gregs[5] = 0; + regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc); + regs->pc = (unsigned long) ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUSH4State *regs) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr; + int i; + int err = 0; + + frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + tswap_siginfo(&frame->info, info); + + /* Create the ucontext. */ + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, (unsigned long *)&frame->uc.tuc_link); + __put_user((unsigned long)target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(regs->gregs[15]), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->uc.tuc_mcontext, + regs, set->sig[0]); + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + regs->pr = (unsigned long) ka->sa_restorer; + } else { + /* Generate return code (system call to sigreturn) */ + __put_user(MOVW(2), &frame->retcode[0]); + __put_user(TRAP_NOARG, &frame->retcode[1]); + __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); + regs->pr = (unsigned long) frame->retcode; + } + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + regs->gregs[15] = frame_addr; + regs->gregs[4] = sig; /* Arg for signal handler */ + regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info); + regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc); + regs->pc = (unsigned long) ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV); +} + +long do_sigreturn(CPUSH4State *regs) +{ + struct target_sigframe *frame; + abi_ulong frame_addr; + sigset_t blocked; + target_sigset_t target_set; + target_ulong r0; + int i; + int err = 0; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "do_sigreturn\n"); +#endif + frame_addr = regs->gregs[15]; + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + __get_user(target_set.sig[0], &frame->sc.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + + if (err) + goto badframe; + + target_to_host_sigset_internal(&blocked, &target_set); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + + restore_sigcontext(regs, &frame->sc, &r0); + + unlock_user_struct(frame, frame_addr, 0); + return r0; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +long do_rt_sigreturn(CPUSH4State *regs) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr; + sigset_t blocked; + target_ulong r0; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "do_rt_sigreturn\n"); +#endif + frame_addr = regs->gregs[15]; + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + + restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0); + + if (do_sigaltstack(frame_addr + + offsetof(struct target_rt_sigframe, uc.tuc_stack), + 0, get_sp_from_cpustate(regs)) == -EFAULT) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return r0; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} +#elif defined(TARGET_MICROBLAZE) + +struct target_sigcontext { + struct target_pt_regs regs; /* needs to be first */ + uint32_t oldmask; +}; + +struct target_stack_t { + abi_ulong ss_sp; + int ss_flags; + unsigned int ss_size; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + struct target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1]; +}; + +/* Signal frames. */ +struct target_signal_frame { + struct target_ucontext uc; + uint32_t extramask[TARGET_NSIG_WORDS - 1]; + uint32_t tramp[2]; +}; + +struct rt_signal_frame { + siginfo_t info; + struct ucontext uc; + uint32_t tramp[2]; +}; + +static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env) +{ + __put_user(env->regs[0], &sc->regs.r0); + __put_user(env->regs[1], &sc->regs.r1); + __put_user(env->regs[2], &sc->regs.r2); + __put_user(env->regs[3], &sc->regs.r3); + __put_user(env->regs[4], &sc->regs.r4); + __put_user(env->regs[5], &sc->regs.r5); + __put_user(env->regs[6], &sc->regs.r6); + __put_user(env->regs[7], &sc->regs.r7); + __put_user(env->regs[8], &sc->regs.r8); + __put_user(env->regs[9], &sc->regs.r9); + __put_user(env->regs[10], &sc->regs.r10); + __put_user(env->regs[11], &sc->regs.r11); + __put_user(env->regs[12], &sc->regs.r12); + __put_user(env->regs[13], &sc->regs.r13); + __put_user(env->regs[14], &sc->regs.r14); + __put_user(env->regs[15], &sc->regs.r15); + __put_user(env->regs[16], &sc->regs.r16); + __put_user(env->regs[17], &sc->regs.r17); + __put_user(env->regs[18], &sc->regs.r18); + __put_user(env->regs[19], &sc->regs.r19); + __put_user(env->regs[20], &sc->regs.r20); + __put_user(env->regs[21], &sc->regs.r21); + __put_user(env->regs[22], &sc->regs.r22); + __put_user(env->regs[23], &sc->regs.r23); + __put_user(env->regs[24], &sc->regs.r24); + __put_user(env->regs[25], &sc->regs.r25); + __put_user(env->regs[26], &sc->regs.r26); + __put_user(env->regs[27], &sc->regs.r27); + __put_user(env->regs[28], &sc->regs.r28); + __put_user(env->regs[29], &sc->regs.r29); + __put_user(env->regs[30], &sc->regs.r30); + __put_user(env->regs[31], &sc->regs.r31); + __put_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env) +{ + __get_user(env->regs[0], &sc->regs.r0); + __get_user(env->regs[1], &sc->regs.r1); + __get_user(env->regs[2], &sc->regs.r2); + __get_user(env->regs[3], &sc->regs.r3); + __get_user(env->regs[4], &sc->regs.r4); + __get_user(env->regs[5], &sc->regs.r5); + __get_user(env->regs[6], &sc->regs.r6); + __get_user(env->regs[7], &sc->regs.r7); + __get_user(env->regs[8], &sc->regs.r8); + __get_user(env->regs[9], &sc->regs.r9); + __get_user(env->regs[10], &sc->regs.r10); + __get_user(env->regs[11], &sc->regs.r11); + __get_user(env->regs[12], &sc->regs.r12); + __get_user(env->regs[13], &sc->regs.r13); + __get_user(env->regs[14], &sc->regs.r14); + __get_user(env->regs[15], &sc->regs.r15); + __get_user(env->regs[16], &sc->regs.r16); + __get_user(env->regs[17], &sc->regs.r17); + __get_user(env->regs[18], &sc->regs.r18); + __get_user(env->regs[19], &sc->regs.r19); + __get_user(env->regs[20], &sc->regs.r20); + __get_user(env->regs[21], &sc->regs.r21); + __get_user(env->regs[22], &sc->regs.r22); + __get_user(env->regs[23], &sc->regs.r23); + __get_user(env->regs[24], &sc->regs.r24); + __get_user(env->regs[25], &sc->regs.r25); + __get_user(env->regs[26], &sc->regs.r26); + __get_user(env->regs[27], &sc->regs.r27); + __get_user(env->regs[28], &sc->regs.r28); + __get_user(env->regs[29], &sc->regs.r29); + __get_user(env->regs[30], &sc->regs.r30); + __get_user(env->regs[31], &sc->regs.r31); + __get_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static abi_ulong get_sigframe(struct target_sigaction *ka, + CPUMBState *env, int frame_size) +{ + abi_ulong sp = env->regs[1]; + + if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + return ((sp - frame_size) & -8UL); +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUMBState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + int i; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto badframe; + + /* Save the mask. */ + __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + setup_sigcontext(&frame->uc.tuc_mcontext, env); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + /* minus 8 is offset to cater for "rtsd r15,8" offset */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + env->regs[15] = ((unsigned long)ka->sa_restorer)-8; + } else { + uint32_t t; + /* Note, these encodings are _big endian_! */ + /* addi r12, r0, __NR_sigreturn */ + t = 0x31800000UL | TARGET_NR_sigreturn; + __put_user(t, frame->tramp + 0); + /* brki r14, 0x8 */ + t = 0xb9cc0008UL; + __put_user(t, frame->tramp + 1); + + /* Return from sighandler will jump to the tramp. + Negative 8 offset because return is rtsd r15, 8 */ + env->regs[15] = ((unsigned long)frame->tramp) - 8; + } + + /* Set up registers for signal handler */ + env->regs[1] = frame_addr; + /* Signal handler args: */ + env->regs[5] = sig; /* Arg 0: signum */ + env->regs[6] = 0; + /* arg 1: sigcontext */ + env->regs[7] = frame_addr += offsetof(typeof(*frame), uc); + + /* Offset of 4 to handle microblaze rtid r14, 0 */ + env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + badframe: + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUMBState *env) +{ + fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUMBState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + target_sigset_t target_set; + sigset_t set; + int i; + + frame_addr = env->regs[R_SP]; + /* Make sure the guest isn't playing games. */ + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) + goto badframe; + + /* Restore blocked signals */ + __get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + restore_sigcontext(&frame->uc.tuc_mcontext, env); + /* We got here through a sigreturn syscall, our path back is via an + rtb insn so setup r14 for that. */ + env->regs[14] = env->sregs[SR_PC]; + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[10]; + badframe: + force_sig(TARGET_SIGSEGV); +} + +long do_rt_sigreturn(CPUMBState *env) +{ + fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +#elif defined(TARGET_CRIS) + +struct target_sigcontext { + struct target_pt_regs regs; /* needs to be first */ + uint32_t oldmask; + uint32_t usp; /* usp before stacking this gunk on it */ +}; + +/* Signal frames. */ +struct target_signal_frame { + struct target_sigcontext sc; + uint32_t extramask[TARGET_NSIG_WORDS - 1]; + uint16_t retcode[4]; /* Trampoline code. */ +}; + +struct rt_signal_frame { + siginfo_t *pinfo; + void *puc; + siginfo_t info; + struct ucontext uc; + uint16_t retcode[4]; /* Trampoline code. */ +}; + +static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env) +{ + __put_user(env->regs[0], &sc->regs.r0); + __put_user(env->regs[1], &sc->regs.r1); + __put_user(env->regs[2], &sc->regs.r2); + __put_user(env->regs[3], &sc->regs.r3); + __put_user(env->regs[4], &sc->regs.r4); + __put_user(env->regs[5], &sc->regs.r5); + __put_user(env->regs[6], &sc->regs.r6); + __put_user(env->regs[7], &sc->regs.r7); + __put_user(env->regs[8], &sc->regs.r8); + __put_user(env->regs[9], &sc->regs.r9); + __put_user(env->regs[10], &sc->regs.r10); + __put_user(env->regs[11], &sc->regs.r11); + __put_user(env->regs[12], &sc->regs.r12); + __put_user(env->regs[13], &sc->regs.r13); + __put_user(env->regs[14], &sc->usp); + __put_user(env->regs[15], &sc->regs.acr); + __put_user(env->pregs[PR_MOF], &sc->regs.mof); + __put_user(env->pregs[PR_SRP], &sc->regs.srp); + __put_user(env->pc, &sc->regs.erp); +} + +static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env) +{ + __get_user(env->regs[0], &sc->regs.r0); + __get_user(env->regs[1], &sc->regs.r1); + __get_user(env->regs[2], &sc->regs.r2); + __get_user(env->regs[3], &sc->regs.r3); + __get_user(env->regs[4], &sc->regs.r4); + __get_user(env->regs[5], &sc->regs.r5); + __get_user(env->regs[6], &sc->regs.r6); + __get_user(env->regs[7], &sc->regs.r7); + __get_user(env->regs[8], &sc->regs.r8); + __get_user(env->regs[9], &sc->regs.r9); + __get_user(env->regs[10], &sc->regs.r10); + __get_user(env->regs[11], &sc->regs.r11); + __get_user(env->regs[12], &sc->regs.r12); + __get_user(env->regs[13], &sc->regs.r13); + __get_user(env->regs[14], &sc->usp); + __get_user(env->regs[15], &sc->regs.acr); + __get_user(env->pregs[PR_MOF], &sc->regs.mof); + __get_user(env->pregs[PR_SRP], &sc->regs.srp); + __get_user(env->pc, &sc->regs.erp); +} + +static abi_ulong get_sigframe(CPUCRISState *env, int framesize) +{ + abi_ulong sp; + /* Align the stack downwards to 4. */ + sp = (env->regs[R_SP] & ~3); + return sp - framesize; +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUCRISState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + int i; + + frame_addr = get_sigframe(env, sizeof *frame); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto badframe; + + /* + * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't + * use this trampoline anymore but it sets it up for GDB. + * In QEMU, using the trampoline simplifies things a bit so we use it. + * + * This is movu.w __NR_sigreturn, r9; break 13; + */ + __put_user(0x9c5f, frame->retcode+0); + __put_user(TARGET_NR_sigreturn, + frame->retcode + 1); + __put_user(0xe93d, frame->retcode + 2); + + /* Save the mask. */ + __put_user(set->sig[0], &frame->sc.oldmask); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + setup_sigcontext(&frame->sc, env); + + /* Move the stack and setup the arguments for the handler. */ + env->regs[R_SP] = frame_addr; + env->regs[10] = sig; + env->pc = (unsigned long) ka->_sa_handler; + /* Link SRP so the guest returns through the trampoline. */ + env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode); + + unlock_user_struct(frame, frame_addr, 1); + return; + badframe: + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUCRISState *env) +{ + fprintf(stderr, "CRIS setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUCRISState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + target_sigset_t target_set; + sigset_t set; + int i; + + frame_addr = env->regs[R_SP]; + /* Make sure the guest isn't playing games. */ + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) + goto badframe; + + /* Restore blocked signals */ + __get_user(target_set.sig[0], &frame->sc.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + restore_sigcontext(&frame->sc, env); + unlock_user_struct(frame, frame_addr, 0); + return env->regs[10]; + badframe: + force_sig(TARGET_SIGSEGV); +} + +long do_rt_sigreturn(CPUCRISState *env) +{ + fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +#elif defined(TARGET_OPENRISC) + +struct target_sigcontext { + struct target_pt_regs regs; + abi_ulong oldmask; + abi_ulong usp; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct target_rt_sigframe { + abi_ulong pinfo; + uint64_t puc; + struct target_siginfo info; + struct target_sigcontext sc; + struct target_ucontext uc; + unsigned char retcode[16]; /* trampoline code */ +}; + +/* This is the asm-generic/ucontext.h version */ +#if 0 +static int restore_sigcontext(CPUOpenRISCState *regs, + struct target_sigcontext *sc) +{ + unsigned int err = 0; + unsigned long old_usp; + + /* Alwys make any pending restarted system call return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + /* restore the regs from &sc->regs (same as sc, since regs is first) + * (sc is already checked for VERIFY_READ since the sigframe was + * checked in sys_sigreturn previously) + */ + + if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) { + goto badframe; + } + + /* make sure the U-flag is set so user-mode cannot fool us */ + + regs->sr &= ~SR_SM; + + /* restore the old USP as it was before we stacked the sc etc. + * (we cannot just pop the sigcontext since we aligned the sp and + * stuff after pushing it) + */ + + __get_user(old_usp, &sc->usp); + phx_signal("old_usp 0x%lx", old_usp); + + __PHX__ REALLY /* ??? */ + wrusp(old_usp); + regs->gpr[1] = old_usp; + + /* TODO: the other ports use regs->orig_XX to disable syscall checks + * after this completes, but we don't use that mechanism. maybe we can + * use it now ? + */ + + return err; + +badframe: + return 1; +} +#endif + +/* Set up a signal frame. */ + +static void setup_sigcontext(struct target_sigcontext *sc, + CPUOpenRISCState *regs, + unsigned long mask) +{ + unsigned long usp = regs->gpr[1]; + + /* copy the regs. they are first in sc so we can use sc directly */ + + /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/ + + /* Set the frametype to CRIS_FRAME_NORMAL for the execution of + the signal handler. The frametype will be restored to its previous + value in restore_sigcontext. */ + /*regs->frametype = CRIS_FRAME_NORMAL;*/ + + /* then some other stuff */ + __put_user(mask, &sc->oldmask); + __put_user(usp, &sc->usp); +} + +static inline unsigned long align_sigframe(unsigned long sp) +{ + unsigned long i; + i = sp & ~3UL; + return i; +} + +static inline abi_ulong get_sigframe(struct target_sigaction *ka, + CPUOpenRISCState *regs, + size_t frame_size) +{ + unsigned long sp = regs->gpr[1]; + int onsigstack = on_sig_stack(sp); + + /* redzone */ + /* This is the X/Open sanctioned signal stack switching. */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + sp = align_sigframe(sp - frame_size); + + /* + * If we are on the alternate signal stack and would overflow it, don't. + * Return an always-bogus address instead so we will die with SIGSEGV. + */ + + if (onsigstack && !likely(on_sig_stack(sp))) { + return -1L; + } + + return sp; +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUOpenRISCState *env) +{ + int err = 0; + abi_ulong frame_addr; + unsigned long return_ip; + struct target_rt_sigframe *frame; + abi_ulong info_addr, uc_addr; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); + __put_user(info_addr, &frame->pinfo); + uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); + __put_user(uc_addr, &frame->puc); + + if (ka->sa_flags & SA_SIGINFO) { + tswap_siginfo(&frame->info, info); + } + + /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/ + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->sc, env, set->sig[0]); + + /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/ + + /* trampoline - the desired return ip is the retcode itself */ + return_ip = (unsigned long)&frame->retcode; + /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */ + __put_user(0xa960, (short *)(frame->retcode + 0)); + __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2)); + __put_user(0x20000001, (unsigned long *)(frame->retcode + 4)); + __put_user(0x15000000, (unsigned long *)(frame->retcode + 8)); + + if (err) { + goto give_sigsegv; + } + + /* TODO what is the current->exec_domain stuff and invmap ? */ + + /* Set up registers for signal handler */ + env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */ + env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */ + env->gpr[3] = (unsigned long)sig; /* arg 1: signo */ + env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */ + env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */ + + /* actually move the usp to reflect the stacked frame */ + env->gpr[1] = (unsigned long)frame; + + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + if (sig == TARGET_SIGSEGV) { + ka->_sa_handler = TARGET_SIG_DFL; + } + force_sig(TARGET_SIGSEGV); +} + +long do_sigreturn(CPUOpenRISCState *env) +{ + + qemu_log("do_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +long do_rt_sigreturn(CPUOpenRISCState *env) +{ + qemu_log("do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} +/* TARGET_OPENRISC */ + +#elif defined(TARGET_S390X) + +#define __NUM_GPRS 16 +#define __NUM_FPRS 16 +#define __NUM_ACRS 16 + +#define S390_SYSCALL_SIZE 2 +#define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */ + +#define _SIGCONTEXT_NSIG 64 +#define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */ +#define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW) +#define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS) +#define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */ +#define S390_SYSCALL_OPCODE ((uint16_t)0x0a00) + +typedef struct { + target_psw_t psw; + target_ulong gprs[__NUM_GPRS]; + unsigned int acrs[__NUM_ACRS]; +} target_s390_regs_common; + +typedef struct { + unsigned int fpc; + double fprs[__NUM_FPRS]; +} target_s390_fp_regs; + +typedef struct { + target_s390_regs_common regs; + target_s390_fp_regs fpregs; +} target_sigregs; + +struct target_sigcontext { + target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS]; + target_sigregs *sregs; +}; + +typedef struct { + uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; + struct target_sigcontext sc; + target_sigregs sregs; + int signo; + uint8_t retcode[S390_SYSCALL_SIZE]; +} sigframe; + +struct target_ucontext { + target_ulong tuc_flags; + struct target_ucontext *tuc_link; + target_stack_t tuc_stack; + target_sigregs tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +typedef struct { + uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; + uint8_t retcode[S390_SYSCALL_SIZE]; + struct target_siginfo info; + struct target_ucontext uc; +} rt_sigframe; + +static inline abi_ulong +get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size) +{ + abi_ulong sp; + + /* Default to using normal stack */ + sp = env->regs[15]; + + /* This is the X/Open sanctioned signal stack switching. */ + if (ka->sa_flags & TARGET_SA_ONSTACK) { + if (!sas_ss_flags(sp)) { + sp = target_sigaltstack_used.ss_sp + + target_sigaltstack_used.ss_size; + } + } + + /* This is the legacy signal stack switching. */ + else if (/* FIXME !user_mode(regs) */ 0 && + !(ka->sa_flags & TARGET_SA_RESTORER) && + ka->sa_restorer) { + sp = (abi_ulong) ka->sa_restorer; + } + + return (sp - frame_size) & -8ul; +} + +static void save_sigregs(CPUS390XState *env, target_sigregs *sregs) +{ + int i; + //save_access_regs(current->thread.acrs); FIXME + + /* Copy a 'clean' PSW mask to the user to avoid leaking + information about whether PER is currently on. */ + __put_user(env->psw.mask, &sregs->regs.psw.mask); + __put_user(env->psw.addr, &sregs->regs.psw.addr); + for (i = 0; i < 16; i++) { + __put_user(env->regs[i], &sregs->regs.gprs[i]); + } + for (i = 0; i < 16; i++) { + __put_user(env->aregs[i], &sregs->regs.acrs[i]); + } + /* + * We have to store the fp registers to current->thread.fp_regs + * to merge them with the emulated registers. + */ + //save_fp_regs(¤t->thread.fp_regs); FIXME + for (i = 0; i < 16; i++) { + __put_user(get_freg(env, i)->ll, &sregs->fpregs.fprs[i]); + } +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUS390XState *env) +{ + sigframe *frame; + abi_ulong frame_addr; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, + (unsigned long long)frame_addr); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + qemu_log("%s: 1\n", __FUNCTION__); + __put_user(set->sig[0], &frame->sc.oldmask[0]); + + save_sigregs(env, &frame->sregs); + + __put_user((abi_ulong)(unsigned long)&frame->sregs, + (abi_ulong *)&frame->sc.sregs); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + env->regs[14] = (unsigned long) + ka->sa_restorer | PSW_ADDR_AMODE; + } else { + env->regs[14] = (unsigned long) + frame->retcode | PSW_ADDR_AMODE; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, + (uint16_t *)(frame->retcode)); + } + + /* Set up backchain. */ + __put_user(env->regs[15], (abi_ulong *) frame); + + /* Set up registers for signal handler */ + env->regs[15] = frame_addr; + env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; + + env->regs[2] = sig; //map_signal(sig); + env->regs[3] = frame_addr += offsetof(typeof(*frame), sc); + + /* We forgot to include these in the sigcontext. + To avoid breaking binary compatibility, they are passed as args. */ + env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no; + env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr; + + /* Place signal number on stack to allow backtrace from handler. */ + __put_user(env->regs[2], (int *) &frame->signo); + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + qemu_log("%s: give_sigsegv\n", __FUNCTION__); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUS390XState *env) +{ + int i; + rt_sigframe *frame; + abi_ulong frame_addr; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, + (unsigned long long)frame_addr); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + qemu_log("%s: 1\n", __FUNCTION__); + tswap_siginfo(&frame->info, info); + + /* Create the ucontext. */ + __put_user(0, &frame->uc.tuc_flags); + __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); + save_sigregs(env, &frame->uc.tuc_mcontext); + for (i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user((abi_ulong)set->sig[i], + (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]); + } + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE; + } else { + env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, + (uint16_t *)(frame->retcode)); + } + + /* Set up backchain. */ + __put_user(env->regs[15], (abi_ulong *) frame); + + /* Set up registers for signal handler */ + env->regs[15] = frame_addr; + env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; + + env->regs[2] = sig; //map_signal(sig); + env->regs[3] = frame_addr + offsetof(typeof(*frame), info); + env->regs[4] = frame_addr + offsetof(typeof(*frame), uc); + return; + +give_sigsegv: + qemu_log("%s: give_sigsegv\n", __FUNCTION__); + force_sig(TARGET_SIGSEGV); +} + +static int +restore_sigregs(CPUS390XState *env, target_sigregs *sc) +{ + int err = 0; + int i; + + for (i = 0; i < 16; i++) { + __get_user(env->regs[i], &sc->regs.gprs[i]); + } + + __get_user(env->psw.mask, &sc->regs.psw.mask); + qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n", + __FUNCTION__, (unsigned long long)sc->regs.psw.addr, + (unsigned long long)env->psw.addr); + __get_user(env->psw.addr, &sc->regs.psw.addr); + /* FIXME: 31-bit -> | PSW_ADDR_AMODE */ + + for (i = 0; i < 16; i++) { + __get_user(env->aregs[i], &sc->regs.acrs[i]); + } + for (i = 0; i < 16; i++) { + __get_user(get_freg(env, i)->ll, &sc->fpregs.fprs[i]); + } + + return err; +} + +long do_sigreturn(CPUS390XState *env) +{ + sigframe *frame; + abi_ulong frame_addr = env->regs[15]; + qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, + (unsigned long long)frame_addr); + target_sigset_t target_set; + sigset_t set; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { + goto badframe; + } + __get_user(target_set.sig[0], &frame->sc.oldmask[0]); + + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ + + if (restore_sigregs(env, &frame->sregs)) { + goto badframe; + } + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[2]; + +badframe: + force_sig(TARGET_SIGSEGV); + return 0; +} + +long do_rt_sigreturn(CPUS390XState *env) +{ + rt_sigframe *frame; + abi_ulong frame_addr = env->regs[15]; + qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, + (unsigned long long)frame_addr); + sigset_t set; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { + goto badframe; + } + target_to_host_sigset(&set, &frame->uc.tuc_sigmask); + + do_sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ + + if (restore_sigregs(env, &frame->uc.tuc_mcontext)) { + goto badframe; + } + + if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0, + get_sp_from_cpustate(env)) == -EFAULT) { + goto badframe; + } + unlock_user_struct(frame, frame_addr, 0); + return env->regs[2]; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +#elif defined(TARGET_PPC) + +/* Size of dummy stack frame allocated when calling signal handler. + See arch/powerpc/include/asm/ptrace.h. */ +#if defined(TARGET_PPC64) +#define SIGNAL_FRAMESIZE 128 +#else +#define SIGNAL_FRAMESIZE 64 +#endif + +/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC; + on 64-bit PPC, sigcontext and mcontext are one and the same. */ +struct target_mcontext { + target_ulong mc_gregs[48]; + /* Includes fpscr. */ + uint64_t mc_fregs[33]; + target_ulong mc_pad[2]; + /* We need to handle Altivec and SPE at the same time, which no + kernel needs to do. Fortunately, the kernel defines this bit to + be Altivec-register-large all the time, rather than trying to + twiddle it based on the specific platform. */ + union { + /* SPE vector registers. One extra for SPEFSCR. */ + uint32_t spe[33]; + /* Altivec vector registers. The packing of VSCR and VRSAVE + varies depending on whether we're PPC64 or not: PPC64 splits + them apart; PPC32 stuffs them together. */ +#if defined(TARGET_PPC64) +#define QEMU_NVRREG 34 +#else +#define QEMU_NVRREG 33 +#endif + ppc_avr_t altivec[QEMU_NVRREG]; +#undef QEMU_NVRREG + } mc_vregs __attribute__((__aligned__(16))); +}; + +/* See arch/powerpc/include/asm/sigcontext.h. */ +struct target_sigcontext { + target_ulong _unused[4]; + int32_t signal; +#if defined(TARGET_PPC64) + int32_t pad0; +#endif + target_ulong handler; + target_ulong oldmask; + target_ulong regs; /* struct pt_regs __user * */ +#if defined(TARGET_PPC64) + struct target_mcontext mcontext; +#endif +}; + +/* Indices for target_mcontext.mc_gregs, below. + See arch/powerpc/include/asm/ptrace.h for details. */ +enum { + TARGET_PT_R0 = 0, + TARGET_PT_R1 = 1, + TARGET_PT_R2 = 2, + TARGET_PT_R3 = 3, + TARGET_PT_R4 = 4, + TARGET_PT_R5 = 5, + TARGET_PT_R6 = 6, + TARGET_PT_R7 = 7, + TARGET_PT_R8 = 8, + TARGET_PT_R9 = 9, + TARGET_PT_R10 = 10, + TARGET_PT_R11 = 11, + TARGET_PT_R12 = 12, + TARGET_PT_R13 = 13, + TARGET_PT_R14 = 14, + TARGET_PT_R15 = 15, + TARGET_PT_R16 = 16, + TARGET_PT_R17 = 17, + TARGET_PT_R18 = 18, + TARGET_PT_R19 = 19, + TARGET_PT_R20 = 20, + TARGET_PT_R21 = 21, + TARGET_PT_R22 = 22, + TARGET_PT_R23 = 23, + TARGET_PT_R24 = 24, + TARGET_PT_R25 = 25, + TARGET_PT_R26 = 26, + TARGET_PT_R27 = 27, + TARGET_PT_R28 = 28, + TARGET_PT_R29 = 29, + TARGET_PT_R30 = 30, + TARGET_PT_R31 = 31, + TARGET_PT_NIP = 32, + TARGET_PT_MSR = 33, + TARGET_PT_ORIG_R3 = 34, + TARGET_PT_CTR = 35, + TARGET_PT_LNK = 36, + TARGET_PT_XER = 37, + TARGET_PT_CCR = 38, + /* Yes, there are two registers with #39. One is 64-bit only. */ + TARGET_PT_MQ = 39, + TARGET_PT_SOFTE = 39, + TARGET_PT_TRAP = 40, + TARGET_PT_DAR = 41, + TARGET_PT_DSISR = 42, + TARGET_PT_RESULT = 43, + TARGET_PT_REGS_COUNT = 44 +}; + + +struct target_ucontext { + target_ulong tuc_flags; + target_ulong tuc_link; /* struct ucontext __user * */ + struct target_sigaltstack tuc_stack; +#if !defined(TARGET_PPC64) + int32_t tuc_pad[7]; + target_ulong tuc_regs; /* struct mcontext __user * + points to uc_mcontext field */ +#endif + target_sigset_t tuc_sigmask; +#if defined(TARGET_PPC64) + target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ + struct target_sigcontext tuc_sigcontext; +#else + int32_t tuc_maskext[30]; + int32_t tuc_pad2[3]; + struct target_mcontext tuc_mcontext; +#endif +}; + +/* See arch/powerpc/kernel/signal_32.c. */ +struct target_sigframe { + struct target_sigcontext sctx; + struct target_mcontext mctx; + int32_t abigap[56]; +}; + +#if defined(TARGET_PPC64) + +#define TARGET_TRAMP_SIZE 6 + +struct target_rt_sigframe { + /* sys_rt_sigreturn requires the ucontext be the first field */ + struct target_ucontext uc; + target_ulong _unused[2]; + uint32_t trampoline[TARGET_TRAMP_SIZE]; + target_ulong pinfo; /* struct siginfo __user * */ + target_ulong puc; /* void __user * */ + struct target_siginfo info; + /* 64 bit ABI allows for 288 bytes below sp before decrementing it. */ + char abigap[288]; +} __attribute__((aligned(16))); + +#else + +struct target_rt_sigframe { + struct target_siginfo info; + struct target_ucontext uc; + int32_t abigap[56]; +}; + +#endif + +#if defined(TARGET_PPC64) + +struct target_func_ptr { + target_ulong entry; + target_ulong toc; +}; + +#endif + +/* We use the mc_pad field for the signal return trampoline. */ +#define tramp mc_pad + +/* See arch/powerpc/kernel/signal.c. */ +static target_ulong get_sigframe(struct target_sigaction *ka, + CPUPPCState *env, + int frame_size) +{ + target_ulong oldsp, newsp; + + oldsp = env->gpr[1]; + + if ((ka->sa_flags & TARGET_SA_ONSTACK) && + (sas_ss_flags(oldsp) == 0)) { + oldsp = (target_sigaltstack_used.ss_sp + + target_sigaltstack_used.ss_size); + } + + newsp = (oldsp - frame_size) & ~0xFUL; + + return newsp; +} + +static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame) +{ + target_ulong msr = env->msr; + int i; + target_ulong ccr = 0; + + /* In general, the kernel attempts to be intelligent about what it + needs to save for Altivec/FP/SPE registers. We don't care that + much, so we just go ahead and save everything. */ + + /* Save general registers. */ + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + __put_user(env->gpr[i], &frame->mc_gregs[i]); + } + __put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]); + __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]); + __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]); + __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]); + + for (i = 0; i < ARRAY_SIZE(env->crf); i++) { + ccr |= env->crf[i] << (32 - ((i + 1) * 4)); + } + __put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]); + + /* Save Altivec registers if necessary. */ + if (env->insns_flags & PPC_ALTIVEC) { + for (i = 0; i < ARRAY_SIZE(env->avr); i++) { + ppc_avr_t *avr = &env->avr[i]; + ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; + + __put_user(avr->u64[0], &vreg->u64[0]); + __put_user(avr->u64[1], &vreg->u64[1]); + } + /* Set MSR_VR in the saved MSR value to indicate that + frame->mc_vregs contains valid data. */ + msr |= MSR_VR; + __put_user((uint32_t)env->spr[SPR_VRSAVE], + &frame->mc_vregs.altivec[32].u32[3]); + } + + /* Save floating point registers. */ + if (env->insns_flags & PPC_FLOAT) { + for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { + __put_user(env->fpr[i], &frame->mc_fregs[i]); + } + __put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]); + } + + /* Save SPE registers. The kernel only saves the high half. */ + if (env->insns_flags & PPC_SPE) { +#if defined(TARGET_PPC64) + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + __put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i]); + } +#else + for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { + __put_user(env->gprh[i], &frame->mc_vregs.spe[i]); + } +#endif + /* Set MSR_SPE in the saved MSR value to indicate that + frame->mc_vregs contains valid data. */ + msr |= MSR_SPE; + __put_user(env->spe_fscr, &frame->mc_vregs.spe[32]); + } + + /* Store MSR. */ + __put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]); +} + +static void encode_trampoline(int sigret, uint32_t *tramp) +{ + /* Set up the sigreturn trampoline: li r0,sigret; sc. */ + if (sigret) { + __put_user(0x38000000 | sigret, &tramp[0]); + __put_user(0x44000002, &tramp[1]); + } +} + +static void restore_user_regs(CPUPPCState *env, + struct target_mcontext *frame, int sig) +{ + target_ulong save_r2 = 0; + target_ulong msr; + target_ulong ccr; + + int i; + + if (!sig) { + save_r2 = env->gpr[2]; + } + + /* Restore general registers. */ + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + __get_user(env->gpr[i], &frame->mc_gregs[i]); + } + __get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]); + __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]); + __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]); + __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]); + __get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]); + + for (i = 0; i < ARRAY_SIZE(env->crf); i++) { + env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; + } + + if (!sig) { + env->gpr[2] = save_r2; + } + /* Restore MSR. */ + __get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]); + + /* If doing signal return, restore the previous little-endian mode. */ + if (sig) + env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); + + /* Restore Altivec registers if necessary. */ + if (env->insns_flags & PPC_ALTIVEC) { + for (i = 0; i < ARRAY_SIZE(env->avr); i++) { + ppc_avr_t *avr = &env->avr[i]; + ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; + + __get_user(avr->u64[0], &vreg->u64[0]); + __get_user(avr->u64[1], &vreg->u64[1]); + } + /* Set MSR_VEC in the saved MSR value to indicate that + frame->mc_vregs contains valid data. */ + __get_user(env->spr[SPR_VRSAVE], + (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])); + } + + /* Restore floating point registers. */ + if (env->insns_flags & PPC_FLOAT) { + uint64_t fpscr; + for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { + __get_user(env->fpr[i], &frame->mc_fregs[i]); + } + __get_user(fpscr, &frame->mc_fregs[32]); + env->fpscr = (uint32_t) fpscr; + } + + /* Save SPE registers. The kernel only saves the high half. */ + if (env->insns_flags & PPC_SPE) { +#if defined(TARGET_PPC64) + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + uint32_t hi; + + __get_user(hi, &frame->mc_vregs.spe[i]); + env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]); + } +#else + for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { + __get_user(env->gprh[i], &frame->mc_vregs.spe[i]); + } +#endif + __get_user(env->spe_fscr, &frame->mc_vregs.spe[32]); + } +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUPPCState *env) +{ + struct target_sigframe *frame; + struct target_sigcontext *sc; + target_ulong frame_addr, newsp; + int err = 0; +#if defined(TARGET_PPC64) + struct image_info *image = ((TaskState *)thread_cpu->opaque)->info; +#endif + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) + goto sigsegv; + sc = &frame->sctx; + + __put_user(ka->_sa_handler, &sc->handler); + __put_user(set->sig[0], &sc->oldmask); +#if TARGET_ABI_BITS == 64 + __put_user(set->sig[0] >> 32, &sc->_unused[3]); +#else + __put_user(set->sig[1], &sc->_unused[3]); +#endif + __put_user(h2g(&frame->mctx), &sc->regs); + __put_user(sig, &sc->signal); + + /* Save user regs. */ + save_user_regs(env, &frame->mctx); + + /* Construct the trampoline code on the stack. */ + encode_trampoline(TARGET_NR_sigreturn, (uint32_t *)&frame->mctx.tramp); + + /* The kernel checks for the presence of a VDSO here. We don't + emulate a vdso, so use a sigreturn system call. */ + env->lr = (target_ulong) h2g(frame->mctx.tramp); + + /* Turn off all fp exceptions. */ + env->fpscr = 0; + + /* Create a stack frame for the caller of the handler. */ + newsp = frame_addr - SIGNAL_FRAMESIZE; + err |= put_user(env->gpr[1], newsp, target_ulong); + + if (err) + goto sigsegv; + + /* Set up registers for signal handler. */ + env->gpr[1] = newsp; + env->gpr[3] = sig; + env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx); + +#if defined(TARGET_PPC64) + if (get_ppc64_abi(image) < 2) { + /* ELFv1 PPC64 function pointers are pointers to OPD entries. */ + struct target_func_ptr *handler = + (struct target_func_ptr *)g2h(ka->_sa_handler); + env->nip = tswapl(handler->entry); + env->gpr[2] = tswapl(handler->toc); + } else { + /* ELFv2 PPC64 function pointers are entry points, but R12 + * must also be set */ + env->nip = tswapl((target_ulong) ka->_sa_handler); + env->gpr[12] = env->nip; + } +#else + env->nip = (target_ulong) ka->_sa_handler; +#endif + + /* Signal handlers are entered in big-endian mode. */ + env->msr &= ~MSR_LE; + + unlock_user_struct(frame, frame_addr, 1); + return; + +sigsegv: + unlock_user_struct(frame, frame_addr, 1); + qemu_log("segfaulting from setup_frame\n"); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUPPCState *env) +{ + struct target_rt_sigframe *rt_sf; + uint32_t *trampptr = 0; + struct target_mcontext *mctx = 0; + target_ulong rt_sf_addr, newsp = 0; + int i, err = 0; +#if defined(TARGET_PPC64) + struct image_info *image = ((TaskState *)thread_cpu->opaque)->info; +#endif + + rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); + if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) + goto sigsegv; + + tswap_siginfo(&rt_sf->info, info); + + __put_user(0, &rt_sf->uc.tuc_flags); + __put_user(0, &rt_sf->uc.tuc_link); + __put_user((target_ulong)target_sigaltstack_used.ss_sp, + &rt_sf->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->gpr[1]), + &rt_sf->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &rt_sf->uc.tuc_stack.ss_size); +#if !defined(TARGET_PPC64) + __put_user(h2g (&rt_sf->uc.tuc_mcontext), + &rt_sf->uc.tuc_regs); +#endif + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); + } + +#if defined(TARGET_PPC64) + mctx = &rt_sf->uc.tuc_sigcontext.mcontext; + trampptr = &rt_sf->trampoline[0]; +#else + mctx = &rt_sf->uc.tuc_mcontext; + trampptr = (uint32_t *)&rt_sf->uc.tuc_mcontext.tramp; +#endif + + save_user_regs(env, mctx); + encode_trampoline(TARGET_NR_rt_sigreturn, trampptr); + + /* The kernel checks for the presence of a VDSO here. We don't + emulate a vdso, so use a sigreturn system call. */ + env->lr = (target_ulong) h2g(trampptr); + + /* Turn off all fp exceptions. */ + env->fpscr = 0; + + /* Create a stack frame for the caller of the handler. */ + newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); + err |= put_user(env->gpr[1], newsp, target_ulong); + + if (err) + goto sigsegv; + + /* Set up registers for signal handler. */ + env->gpr[1] = newsp; + env->gpr[3] = (target_ulong) sig; + env->gpr[4] = (target_ulong) h2g(&rt_sf->info); + env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); + env->gpr[6] = (target_ulong) h2g(rt_sf); + +#if defined(TARGET_PPC64) + if (get_ppc64_abi(image) < 2) { + /* ELFv1 PPC64 function pointers are pointers to OPD entries. */ + struct target_func_ptr *handler = + (struct target_func_ptr *)g2h(ka->_sa_handler); + env->nip = tswapl(handler->entry); + env->gpr[2] = tswapl(handler->toc); + } else { + /* ELFv2 PPC64 function pointers are entry points, but R12 + * must also be set */ + env->nip = tswapl((target_ulong) ka->_sa_handler); + env->gpr[12] = env->nip; + } +#else + env->nip = (target_ulong) ka->_sa_handler; +#endif + + /* Signal handlers are entered in big-endian mode. */ + env->msr &= ~MSR_LE; + + unlock_user_struct(rt_sf, rt_sf_addr, 1); + return; + +sigsegv: + unlock_user_struct(rt_sf, rt_sf_addr, 1); + qemu_log("segfaulting from setup_rt_frame\n"); + force_sig(TARGET_SIGSEGV); + +} + +long do_sigreturn(CPUPPCState *env) +{ + struct target_sigcontext *sc = NULL; + struct target_mcontext *sr = NULL; + target_ulong sr_addr = 0, sc_addr; + sigset_t blocked; + target_sigset_t set; + + sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE; + if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) + goto sigsegv; + +#if defined(TARGET_PPC64) + set.sig[0] = sc->oldmask + ((uint64_t)(sc->_unused[3]) << 32); +#else + __get_user(set.sig[0], &sc->oldmask); + __get_user(set.sig[1], &sc->_unused[3]); +#endif + target_to_host_sigset_internal(&blocked, &set); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + + __get_user(sr_addr, &sc->regs); + if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) + goto sigsegv; + restore_user_regs(env, sr, 1); + + unlock_user_struct(sr, sr_addr, 1); + unlock_user_struct(sc, sc_addr, 1); + return -TARGET_QEMU_ESIGRETURN; + +sigsegv: + unlock_user_struct(sr, sr_addr, 1); + unlock_user_struct(sc, sc_addr, 1); + qemu_log("segfaulting from do_sigreturn\n"); + force_sig(TARGET_SIGSEGV); + return 0; +} + +/* See arch/powerpc/kernel/signal_32.c. */ +static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig) +{ + struct target_mcontext *mcp; + target_ulong mcp_addr; + sigset_t blocked; + target_sigset_t set; + + if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask), + sizeof (set))) + return 1; + +#if defined(TARGET_PPC64) + mcp_addr = h2g(ucp) + + offsetof(struct target_ucontext, tuc_sigcontext.mcontext); +#else + __get_user(mcp_addr, &ucp->tuc_regs); +#endif + + if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) + return 1; + + target_to_host_sigset_internal(&blocked, &set); + do_sigprocmask(SIG_SETMASK, &blocked, NULL); + restore_user_regs(env, mcp, sig); + + unlock_user_struct(mcp, mcp_addr, 1); + return 0; +} + +long do_rt_sigreturn(CPUPPCState *env) +{ + struct target_rt_sigframe *rt_sf = NULL; + target_ulong rt_sf_addr; + + rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; + if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) + goto sigsegv; + + if (do_setcontext(&rt_sf->uc, env, 1)) + goto sigsegv; + + do_sigaltstack(rt_sf_addr + + offsetof(struct target_rt_sigframe, uc.tuc_stack), + 0, env->gpr[1]); + + unlock_user_struct(rt_sf, rt_sf_addr, 1); + return -TARGET_QEMU_ESIGRETURN; + +sigsegv: + unlock_user_struct(rt_sf, rt_sf_addr, 1); + qemu_log("segfaulting from do_rt_sigreturn\n"); + force_sig(TARGET_SIGSEGV); + return 0; +} + +#elif defined(TARGET_M68K) + +struct target_sigcontext { + abi_ulong sc_mask; + abi_ulong sc_usp; + abi_ulong sc_d0; + abi_ulong sc_d1; + abi_ulong sc_a0; + abi_ulong sc_a1; + unsigned short sc_sr; + abi_ulong sc_pc; +}; + +struct target_sigframe +{ + abi_ulong pretcode; + int sig; + int code; + abi_ulong psc; + char retcode[8]; + abi_ulong extramask[TARGET_NSIG_WORDS-1]; + struct target_sigcontext sc; +}; + +typedef int target_greg_t; +#define TARGET_NGREG 18 +typedef target_greg_t target_gregset_t[TARGET_NGREG]; + +typedef struct target_fpregset { + int f_fpcntl[3]; + int f_fpregs[8*3]; +} target_fpregset_t; + +struct target_mcontext { + int version; + target_gregset_t gregs; + target_fpregset_t fpregs; +}; + +#define TARGET_MCONTEXT_VERSION 2 + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_mcontext tuc_mcontext; + abi_long tuc_filler[80]; + target_sigset_t tuc_sigmask; +}; + +struct target_rt_sigframe +{ + abi_ulong pretcode; + int sig; + abi_ulong pinfo; + abi_ulong puc; + char retcode[8]; + struct target_siginfo info; + struct target_ucontext uc; +}; + +static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env, + abi_ulong mask) +{ + __put_user(mask, &sc->sc_mask); + __put_user(env->aregs[7], &sc->sc_usp); + __put_user(env->dregs[0], &sc->sc_d0); + __put_user(env->dregs[1], &sc->sc_d1); + __put_user(env->aregs[0], &sc->sc_a0); + __put_user(env->aregs[1], &sc->sc_a1); + __put_user(env->sr, &sc->sc_sr); + __put_user(env->pc, &sc->sc_pc); +} + +static void +restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0) +{ + int temp; + + __get_user(env->aregs[7], &sc->sc_usp); + __get_user(env->dregs[1], &sc->sc_d1); + __get_user(env->aregs[0], &sc->sc_a0); + __get_user(env->aregs[1], &sc->sc_a1); + __get_user(env->pc, &sc->sc_pc); + __get_user(temp, &sc->sc_sr); + env->sr = (env->sr & 0xff00) | (temp & 0xff); + + *pd0 = tswapl(sc->sc_d0); +} + +/* + * Determine which stack to use.. + */ +static inline abi_ulong +get_sigframe(struct target_sigaction *ka, CPUM68KState *regs, + size_t frame_size) +{ + unsigned long sp; + + sp = regs->aregs[7]; + + /* This is the X/Open sanctioned signal stack switching. */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + return ((sp - frame_size) & -8UL); +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUM68KState *env) +{ + struct target_sigframe *frame; + abi_ulong frame_addr; + abi_ulong retcode_addr; + abi_ulong sc_addr; + int i; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + __put_user(sig, &frame->sig); + + sc_addr = frame_addr + offsetof(struct target_sigframe, sc); + __put_user(sc_addr, &frame->psc); + + setup_sigcontext(&frame->sc, env, set->sig[0]); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + /* Set up to return from userspace. */ + + retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); + __put_user(retcode_addr, &frame->pretcode); + + /* moveq #,d0; trap #0 */ + + __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), + (uint32_t *)(frame->retcode)); + + /* Set up to return from userspace */ + + env->aregs[7] = frame_addr; + env->pc = ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + force_sig(TARGET_SIGSEGV); +} + +static inline int target_rt_setup_ucontext(struct target_ucontext *uc, + CPUM68KState *env) +{ + target_greg_t *gregs = uc->tuc_mcontext.gregs; + + __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version); + __put_user(env->dregs[0], &gregs[0]); + __put_user(env->dregs[1], &gregs[1]); + __put_user(env->dregs[2], &gregs[2]); + __put_user(env->dregs[3], &gregs[3]); + __put_user(env->dregs[4], &gregs[4]); + __put_user(env->dregs[5], &gregs[5]); + __put_user(env->dregs[6], &gregs[6]); + __put_user(env->dregs[7], &gregs[7]); + __put_user(env->aregs[0], &gregs[8]); + __put_user(env->aregs[1], &gregs[9]); + __put_user(env->aregs[2], &gregs[10]); + __put_user(env->aregs[3], &gregs[11]); + __put_user(env->aregs[4], &gregs[12]); + __put_user(env->aregs[5], &gregs[13]); + __put_user(env->aregs[6], &gregs[14]); + __put_user(env->aregs[7], &gregs[15]); + __put_user(env->pc, &gregs[16]); + __put_user(env->sr, &gregs[17]); + + return 0; +} + +static inline int target_rt_restore_ucontext(CPUM68KState *env, + struct target_ucontext *uc, + int *pd0) +{ + int temp; + target_greg_t *gregs = uc->tuc_mcontext.gregs; + + __get_user(temp, &uc->tuc_mcontext.version); + if (temp != TARGET_MCONTEXT_VERSION) + goto badframe; + + /* restore passed registers */ + __get_user(env->dregs[0], &gregs[0]); + __get_user(env->dregs[1], &gregs[1]); + __get_user(env->dregs[2], &gregs[2]); + __get_user(env->dregs[3], &gregs[3]); + __get_user(env->dregs[4], &gregs[4]); + __get_user(env->dregs[5], &gregs[5]); + __get_user(env->dregs[6], &gregs[6]); + __get_user(env->dregs[7], &gregs[7]); + __get_user(env->aregs[0], &gregs[8]); + __get_user(env->aregs[1], &gregs[9]); + __get_user(env->aregs[2], &gregs[10]); + __get_user(env->aregs[3], &gregs[11]); + __get_user(env->aregs[4], &gregs[12]); + __get_user(env->aregs[5], &gregs[13]); + __get_user(env->aregs[6], &gregs[14]); + __get_user(env->aregs[7], &gregs[15]); + __get_user(env->pc, &gregs[16]); + __get_user(temp, &gregs[17]); + env->sr = (env->sr & 0xff00) | (temp & 0xff); + + *pd0 = env->dregs[0]; + return 0; + +badframe: + return 1; +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUM68KState *env) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr; + abi_ulong retcode_addr; + abi_ulong info_addr; + abi_ulong uc_addr; + int err = 0; + int i; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto give_sigsegv; + + __put_user(sig, &frame->sig); + + info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); + __put_user(info_addr, &frame->pinfo); + + uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); + __put_user(uc_addr, &frame->puc); + + tswap_siginfo(&frame->info, info); + + /* Create the ucontext */ + + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->aregs[7]), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + err |= target_rt_setup_ucontext(&frame->uc, env); + + if (err) + goto give_sigsegv; + + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); + } + + /* Set up to return from userspace. */ + + retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); + __put_user(retcode_addr, &frame->pretcode); + + /* moveq #,d0; notb d0; trap #0 */ + + __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), + (uint32_t *)(frame->retcode + 0)); + __put_user(0x4e40, (uint16_t *)(frame->retcode + 4)); + + if (err) + goto give_sigsegv; + + /* Set up to return from userspace */ + + env->aregs[7] = frame_addr; + env->pc = ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV); +} + +long do_sigreturn(CPUM68KState *env) +{ + struct target_sigframe *frame; + abi_ulong frame_addr = env->aregs[7] - 4; + target_sigset_t target_set; + sigset_t set; + int d0, i; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + /* set blocked signals */ + + __get_user(target_set.sig[0], &frame->sc.sc_mask); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + /* restore registers */ + + restore_sigcontext(env, &frame->sc, &d0); + + unlock_user_struct(frame, frame_addr, 0); + return d0; + +badframe: + force_sig(TARGET_SIGSEGV); + return 0; +} + +long do_rt_sigreturn(CPUM68KState *env) +{ + struct target_rt_sigframe *frame; + abi_ulong frame_addr = env->aregs[7] - 4; + target_sigset_t target_set; + sigset_t set; + int d0; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) + goto badframe; + + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + /* restore registers */ + + if (target_rt_restore_ucontext(env, &frame->uc, &d0)) + goto badframe; + + if (do_sigaltstack(frame_addr + + offsetof(struct target_rt_sigframe, uc.tuc_stack), + 0, get_sp_from_cpustate(env)) == -EFAULT) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return d0; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} + +#elif defined(TARGET_ALPHA) + +struct target_sigcontext { + abi_long sc_onstack; + abi_long sc_mask; + abi_long sc_pc; + abi_long sc_ps; + abi_long sc_regs[32]; + abi_long sc_ownedfp; + abi_long sc_fpregs[32]; + abi_ulong sc_fpcr; + abi_ulong sc_fp_control; + abi_ulong sc_reserved1; + abi_ulong sc_reserved2; + abi_ulong sc_ssize; + abi_ulong sc_sbase; + abi_ulong sc_traparg_a0; + abi_ulong sc_traparg_a1; + abi_ulong sc_traparg_a2; + abi_ulong sc_fp_trap_pc; + abi_ulong sc_fp_trigger_sum; + abi_ulong sc_fp_trigger_inst; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + abi_ulong tuc_osf_sigmask; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; +}; + +struct target_sigframe { + struct target_sigcontext sc; + unsigned int retcode[3]; +}; + +struct target_rt_sigframe { + target_siginfo_t info; + struct target_ucontext uc; + unsigned int retcode[3]; +}; + +#define INSN_MOV_R30_R16 0x47fe0410 +#define INSN_LDI_R0 0x201f0000 +#define INSN_CALLSYS 0x00000083 + +static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env, + abi_ulong frame_addr, target_sigset_t *set) +{ + int i; + + __put_user(on_sig_stack(frame_addr), &sc->sc_onstack); + __put_user(set->sig[0], &sc->sc_mask); + __put_user(env->pc, &sc->sc_pc); + __put_user(8, &sc->sc_ps); + + for (i = 0; i < 31; ++i) { + __put_user(env->ir[i], &sc->sc_regs[i]); + } + __put_user(0, &sc->sc_regs[31]); + + for (i = 0; i < 31; ++i) { + __put_user(env->fir[i], &sc->sc_fpregs[i]); + } + __put_user(0, &sc->sc_fpregs[31]); + __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr); + + __put_user(0, &sc->sc_traparg_a0); /* FIXME */ + __put_user(0, &sc->sc_traparg_a1); /* FIXME */ + __put_user(0, &sc->sc_traparg_a2); /* FIXME */ +} + +static void restore_sigcontext(CPUAlphaState *env, + struct target_sigcontext *sc) +{ + uint64_t fpcr; + int i; + + __get_user(env->pc, &sc->sc_pc); + + for (i = 0; i < 31; ++i) { + __get_user(env->ir[i], &sc->sc_regs[i]); + } + for (i = 0; i < 31; ++i) { + __get_user(env->fir[i], &sc->sc_fpregs[i]); + } + + __get_user(fpcr, &sc->sc_fpcr); + cpu_alpha_store_fpcr(env, fpcr); +} + +static inline abi_ulong get_sigframe(struct target_sigaction *sa, + CPUAlphaState *env, + unsigned long framesize) +{ + abi_ulong sp = env->ir[IR_SP]; + + /* This is the X/Open sanctioned signal stack switching. */ + if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + return (sp - framesize) & -32; +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUAlphaState *env) +{ + abi_ulong frame_addr, r26; + struct target_sigframe *frame; + int err = 0; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + setup_sigcontext(&frame->sc, env, frame_addr, set); + + if (ka->sa_restorer) { + r26 = ka->sa_restorer; + } else { + __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); + __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn, + &frame->retcode[1]); + __put_user(INSN_CALLSYS, &frame->retcode[2]); + /* imb() */ + r26 = frame_addr; + } + + unlock_user_struct(frame, frame_addr, 1); + + if (err) { + give_sigsegv: + if (sig == TARGET_SIGSEGV) { + ka->_sa_handler = TARGET_SIG_DFL; + } + force_sig(TARGET_SIGSEGV); + } + + env->ir[IR_RA] = r26; + env->ir[IR_PV] = env->pc = ka->_sa_handler; + env->ir[IR_A0] = sig; + env->ir[IR_A1] = 0; + env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc); + env->ir[IR_SP] = frame_addr; +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUAlphaState *env) +{ + abi_ulong frame_addr, r26; + struct target_rt_sigframe *frame; + int i, err = 0; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + tswap_siginfo(&frame->info, info); + + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask); + __put_user(target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->ir[IR_SP]), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); + for (i = 0; i < TARGET_NSIG_WORDS; ++i) { + __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); + } + + if (ka->sa_restorer) { + r26 = ka->sa_restorer; + } else { + __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); + __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn, + &frame->retcode[1]); + __put_user(INSN_CALLSYS, &frame->retcode[2]); + /* imb(); */ + r26 = frame_addr; + } + + if (err) { + give_sigsegv: + if (sig == TARGET_SIGSEGV) { + ka->_sa_handler = TARGET_SIG_DFL; + } + force_sig(TARGET_SIGSEGV); + } + + env->ir[IR_RA] = r26; + env->ir[IR_PV] = env->pc = ka->_sa_handler; + env->ir[IR_A0] = sig; + env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info); + env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc); + env->ir[IR_SP] = frame_addr; +} + +long do_sigreturn(CPUAlphaState *env) +{ + struct target_sigcontext *sc; + abi_ulong sc_addr = env->ir[IR_A0]; + target_sigset_t target_set; + sigset_t set; + + if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) { + goto badframe; + } + + target_sigemptyset(&target_set); + __get_user(target_set.sig[0], &sc->sc_mask); + + target_to_host_sigset_internal(&set, &target_set); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + restore_sigcontext(env, sc); + unlock_user_struct(sc, sc_addr, 0); + return env->ir[IR_V0]; + + badframe: + force_sig(TARGET_SIGSEGV); +} + +long do_rt_sigreturn(CPUAlphaState *env) +{ + abi_ulong frame_addr = env->ir[IR_A0]; + struct target_rt_sigframe *frame; + sigset_t set; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { + goto badframe; + } + target_to_host_sigset(&set, &frame->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + restore_sigcontext(env, &frame->uc.tuc_mcontext); + if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, + uc.tuc_stack), + 0, env->ir[IR_SP]) == -EFAULT) { + goto badframe; + } + + unlock_user_struct(frame, frame_addr, 0); + return env->ir[IR_V0]; + + + badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); +} + +#elif defined(TARGET_TILEGX) + +struct target_sigcontext { + union { + /* General-purpose registers. */ + abi_ulong gregs[56]; + struct { + abi_ulong __gregs[53]; + abi_ulong tp; /* Aliases gregs[TREG_TP]. */ + abi_ulong sp; /* Aliases gregs[TREG_SP]. */ + abi_ulong lr; /* Aliases gregs[TREG_LR]. */ + }; + }; + abi_ulong pc; /* Program counter. */ + abi_ulong ics; /* In Interrupt Critical Section? */ + abi_ulong faultnum; /* Fault number. */ + abi_ulong pad[5]; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct target_rt_sigframe { + unsigned char save_area[16]; /* caller save area */ + struct target_siginfo info; + struct target_ucontext uc; +}; + +static void setup_sigcontext(struct target_sigcontext *sc, + CPUArchState *env, int signo) +{ + int i; + + for (i = 0; i < TILEGX_R_COUNT; ++i) { + __put_user(env->regs[i], &sc->gregs[i]); + } + + __put_user(env->pc, &sc->pc); + __put_user(0, &sc->ics); + __put_user(signo, &sc->faultnum); +} + +static void restore_sigcontext(CPUTLGState *env, struct target_sigcontext *sc) +{ + int i; + + for (i = 0; i < TILEGX_R_COUNT; ++i) { + __get_user(env->regs[i], &sc->gregs[i]); + } + + __get_user(env->pc, &sc->pc); +} + +static abi_ulong get_sigframe(struct target_sigaction *ka, CPUArchState *env, + size_t frame_size) +{ + unsigned long sp = env->regs[TILEGX_R_SP]; + + if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size))) { + return -1UL; + } + + if ((ka->sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + sp -= frame_size; + sp &= -16UL; + return sp; +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUArchState *env) +{ + abi_ulong frame_addr; + struct target_rt_sigframe *frame; + unsigned long restorer; + + frame_addr = get_sigframe(ka, env, sizeof(*frame)); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { + goto give_sigsegv; + } + + /* Always write at least the signal number for the stack backtracer. */ + if (ka->sa_flags & TARGET_SA_SIGINFO) { + /* At sigreturn time, restore the callee-save registers too. */ + tswap_siginfo(&frame->info, info); + /* regs->flags |= PT_FLAGS_RESTORE_REGS; FIXME: we can skip it? */ + } else { + __put_user(info->si_signo, &frame->info.si_signo); + } + + /* Create the ucontext. */ + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(env->regs[TILEGX_R_SP]), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->uc.tuc_mcontext, env, info->si_signo); + + restorer = (unsigned long) do_rt_sigreturn; + if (ka->sa_flags & TARGET_SA_RESTORER) { + restorer = (unsigned long) ka->sa_restorer; + } + env->pc = (unsigned long) ka->_sa_handler; + env->regs[TILEGX_R_SP] = (unsigned long) frame; + env->regs[TILEGX_R_LR] = restorer; + env->regs[0] = (unsigned long) sig; + env->regs[1] = (unsigned long) &frame->info; + env->regs[2] = (unsigned long) &frame->uc; + /* regs->flags |= PT_FLAGS_CALLER_SAVES; FIXME: we can skip it? */ + + unlock_user_struct(frame, frame_addr, 1); + return; + +give_sigsegv: + if (sig == TARGET_SIGSEGV) { + ka->_sa_handler = TARGET_SIG_DFL; + } + force_sig(TARGET_SIGSEGV /* , current */); +} + +long do_rt_sigreturn(CPUTLGState *env) +{ + abi_ulong frame_addr = env->regs[TILEGX_R_SP]; + struct target_rt_sigframe *frame; + sigset_t set; + + if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { + goto badframe; + } + target_to_host_sigset(&set, &frame->uc.tuc_sigmask); + do_sigprocmask(SIG_SETMASK, &set, NULL); + + restore_sigcontext(env, &frame->uc.tuc_mcontext); + if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, + uc.tuc_stack), + 0, env->regs[TILEGX_R_SP]) == -EFAULT) { + goto badframe; + } + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[TILEGX_R_RE]; + + + badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); +} + +#else + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUArchState *env) +{ + fprintf(stderr, "setup_frame: not implemented\n"); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUArchState *env) +{ + fprintf(stderr, "setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUArchState *env) +{ + fprintf(stderr, "do_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +long do_rt_sigreturn(CPUArchState *env) +{ + fprintf(stderr, "do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +#endif + +void process_pending_signals(CPUArchState *cpu_env) +{ + CPUState *cpu = ENV_GET_CPU(cpu_env); + int sig; + abi_ulong handler; + sigset_t set, old_set; + target_sigset_t target_old_set; + struct emulated_sigtable *k; + struct target_sigaction *sa; + struct sigqueue *q; + TaskState *ts = cpu->opaque; + + if (!ts->signal_pending) + return; + + /* FIXME: This is not threadsafe. */ + k = ts->sigtab; + for(sig = 1; sig <= TARGET_NSIG; sig++) { + if (k->pending) + goto handle_signal; + k++; + } + /* if no signal is pending, just return */ + ts->signal_pending = 0; + return; + + handle_signal: +#ifdef DEBUG_SIGNAL + fprintf(stderr, "qemu: process signal %d\n", sig); +#endif + /* dequeue signal */ + q = k->first; + k->first = q->next; + if (!k->first) + k->pending = 0; + + sig = gdb_handlesig(cpu, sig); + if (!sig) { + sa = NULL; + handler = TARGET_SIG_IGN; + } else { + sa = &sigact_table[sig - 1]; + handler = sa->_sa_handler; + } + + if (ts->sigsegv_blocked && sig == TARGET_SIGSEGV) { + /* Guest has blocked SIGSEGV but we got one anyway. Assume this + * is a forced SIGSEGV (ie one the kernel handles via force_sig_info + * because it got a real MMU fault), and treat as if default handler. + */ + handler = TARGET_SIG_DFL; + } + + if (handler == TARGET_SIG_DFL) { + /* default handler : ignore some signal. The other are job control or fatal */ + if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { + kill(getpid(),SIGSTOP); + } else if (sig != TARGET_SIGCHLD && + sig != TARGET_SIGURG && + sig != TARGET_SIGWINCH && + sig != TARGET_SIGCONT) { + force_sig(sig); + } + } else if (handler == TARGET_SIG_IGN) { + /* ignore sig */ + } else if (handler == TARGET_SIG_ERR) { + force_sig(sig); + } else { + /* compute the blocked signals during the handler execution */ + target_to_host_sigset(&set, &sa->sa_mask); + /* SA_NODEFER indicates that the current signal should not be + blocked during the handler */ + if (!(sa->sa_flags & TARGET_SA_NODEFER)) + sigaddset(&set, target_to_host_signal(sig)); + + /* block signals in the handler using Linux */ + do_sigprocmask(SIG_BLOCK, &set, &old_set); + /* save the previous blocked signal state to restore it at the + end of the signal execution (see do_sigreturn) */ + host_to_target_sigset_internal(&target_old_set, &old_set); + + /* if the CPU is in VM86 mode, we restore the 32 bit values */ +#if defined(TARGET_I386) && !defined(TARGET_X86_64) + { + CPUX86State *env = cpu_env; + if (env->eflags & VM_MASK) + save_v86_state(env); + } +#endif + /* prepare the stack frame of the virtual CPU */ +#if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64) \ + || defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) + /* These targets do not have traditional signals. */ + setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); +#else + if (sa->sa_flags & TARGET_SA_SIGINFO) + setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); + else + setup_frame(sig, sa, &target_old_set, cpu_env); +#endif + if (sa->sa_flags & TARGET_SA_RESETHAND) + sa->_sa_handler = TARGET_SIG_DFL; + } + if (q != &k->info) + free_sigqueue(cpu_env, q); +} |
