diff options
author | pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-05-07 23:22:46 +0000 |
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committer | pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-05-07 23:22:46 +0000 |
commit | a8c3320434cc0a7e8eaf3d58b56194f37d7441d3 (patch) | |
tree | c5582bd417eb5ce9ceaf35c9a81923a0515c0c12 /linux-user | |
parent | 1ffc346f951f99ab85bbc75047ff79aec219595a (diff) | |
download | hqemu-a8c3320434cc0a7e8eaf3d58b56194f37d7441d3.zip hqemu-a8c3320434cc0a7e8eaf3d58b56194f37d7441d3.tar.gz |
Update ARM non-rt sigframe layout.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4385 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'linux-user')
-rw-r--r-- | linux-user/signal.c | 266 |
1 files changed, 165 insertions, 101 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index 1e5fb20..ef9b735 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -1038,13 +1038,19 @@ struct target_ucontext_v2 { abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); }; -struct sigframe +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; @@ -1082,7 +1088,6 @@ static const abi_ulong retcodes[4] = { }; -#define __put_user_error(x,p,e) __put_user(x, p) #define __get_user_error(x,p,e) __get_user(x, p) static inline int valid_user_regs(CPUState *regs) @@ -1090,38 +1095,34 @@ static inline int valid_user_regs(CPUState *regs) return 1; } -static int +static void setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ CPUState *env, abi_ulong mask) { - int err = 0; - - __put_user_error(env->regs[0], &sc->arm_r0, err); - __put_user_error(env->regs[1], &sc->arm_r1, err); - __put_user_error(env->regs[2], &sc->arm_r2, err); - __put_user_error(env->regs[3], &sc->arm_r3, err); - __put_user_error(env->regs[4], &sc->arm_r4, err); - __put_user_error(env->regs[5], &sc->arm_r5, err); - __put_user_error(env->regs[6], &sc->arm_r6, err); - __put_user_error(env->regs[7], &sc->arm_r7, err); - __put_user_error(env->regs[8], &sc->arm_r8, err); - __put_user_error(env->regs[9], &sc->arm_r9, err); - __put_user_error(env->regs[10], &sc->arm_r10, err); - __put_user_error(env->regs[11], &sc->arm_fp, err); - __put_user_error(env->regs[12], &sc->arm_ip, err); - __put_user_error(env->regs[13], &sc->arm_sp, err); - __put_user_error(env->regs[14], &sc->arm_lr, err); - __put_user_error(env->regs[15], &sc->arm_pc, err); + __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_error(cpsr_read(env), &sc->arm_cpsr, err); + __put_user(cpsr_read(env), &sc->arm_cpsr); #endif - __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err); - __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err); - __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err); - __put_user_error(mask, &sc->oldmask, err); - - return err; + __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 @@ -1180,31 +1181,78 @@ setup_return(CPUState *env, struct emulated_sigaction *ka, return 0; } +static void setup_sigframe_v2(struct target_ucontext_v2 *uc, + target_sigset_t *set, CPUState *env) +{ + struct target_sigaltstack stack; + int i; + + /* 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]); + /* FIXME: Save coprocessor signal frame. */ + 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(int usig, struct emulated_sigaction *ka, - target_sigset_t *set, CPUState *regs) +static void setup_frame_v1(int usig, struct emulated_sigaction *ka, + target_sigset_t *set, CPUState *regs) { - struct sigframe *frame; + struct sigframe_v1 *frame; abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); - int i, err = 0; + int i; if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) return; - err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]); + setup_sigcontext(&frame->sc, regs, set->sig[0]); for(i = 1; i < TARGET_NSIG_WORDS; i++) { if (__put_user(set->sig[i], &frame->extramask[i - 1])) goto end; } - if (err == 0) - err = setup_return(regs, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct sigframe, retcode)); + setup_return(regs, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct sigframe_v1, retcode)); end: unlock_user_struct(frame, frame_addr, 1); - // return err; +} + +static void setup_frame_v2(int usig, struct emulated_sigaction *ka, + target_sigset_t *set, CPUState *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 emulated_sigaction *ka, + target_sigset_t *set, CPUState *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() */ @@ -1215,17 +1263,17 @@ static void setup_rt_frame_v1(int usig, struct emulated_sigaction *ka, struct rt_sigframe_v1 *frame; abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); struct target_sigaltstack stack; - int i, err = 0; + 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_error(info_addr, &frame->pinfo, err); + __put_user(info_addr, &frame->pinfo); uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); - __put_user_error(uc_addr, &frame->puc, err); - err |= copy_siginfo_to_user(&frame->info, info); + __put_user(uc_addr, &frame->puc); + copy_siginfo_to_user(&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)); @@ -1236,26 +1284,20 @@ static void setup_rt_frame_v1(int usig, struct emulated_sigaction *ka, __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); - err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/ - env, set->sig[0]); + setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); for(i = 0; i < TARGET_NSIG_WORDS; i++) { if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) goto end; } - if (err == 0) - err = setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v1, retcode)); + setup_return(env, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v1, retcode)); - if (err == 0) { - env->regs[1] = info_addr; - env->regs[2] = uc_addr; - } + env->regs[1] = info_addr; + env->regs[2] = uc_addr; end: unlock_user_struct(frame, frame_addr, 1); - - // return err; } static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka, @@ -1264,8 +1306,6 @@ static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka, { struct rt_sigframe_v2 *frame; abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); - struct target_sigaltstack stack; - int i, err = 0; abi_ulong info_addr, uc_addr; if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) @@ -1273,42 +1313,17 @@ static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka, info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); - err |= copy_siginfo_to_user(&frame->info, info); + copy_siginfo_to_user(&frame->info, info); - /* Clear all the bits of the ucontext we don't use. */ - memset(&frame->uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); + setup_sigframe_v2(&frame->uc, set, env); - 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_return(env, ka, &frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v2, retcode)); - err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/ - env, set->sig[0]); - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) - goto end; - } + env->regs[1] = info_addr; + env->regs[2] = uc_addr; - if (err == 0) - err = setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v2, retcode)); - - if (err == 0) { - /* - * For realtime signals we must also set the second and third - * arguments for the signal handler. - * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06 - */ - env->regs[1] = info_addr; - env->regs[2] = uc_addr; - } - -end: unlock_user_struct(frame, frame_addr, 1); - - // return err; } static void setup_rt_frame(int usig, struct emulated_sigaction *ka, @@ -1354,10 +1369,10 @@ restore_sigcontext(CPUState *env, struct target_sigcontext *sc) return err; } -long do_sigreturn(CPUState *env) +long do_sigreturn_v1(CPUState *env) { abi_ulong frame_addr; - struct sigframe *frame; + struct sigframe_v1 *frame; target_sigset_t set; sigset_t host_set; int i; @@ -1401,6 +1416,67 @@ badframe: return 0; } +static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, + struct target_ucontext_v2 *uc) +{ + sigset_t host_set; + + target_to_host_sigset(&host_set, &uc->tuc_sigmask); + sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (restore_sigcontext(env, &uc->tuc_mcontext)) + 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; +} + +long do_sigreturn_v2(CPUState *env) +{ + abi_ulong frame_addr; + struct sigframe_v2 *frame; + + /* + * 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. + */ + if (env->regs[13] & 7) + goto badframe; + + frame_addr = env->regs[13]; + 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(SIGSEGV /* , current */); + return 0; +} + +long do_sigreturn(CPUState *env) +{ + if (get_osversion() >= 0x020612) { + return do_sigreturn_v2(env); + } else { + return do_sigreturn_v1(env); + } +} + long do_rt_sigreturn_v1(CPUState *env) { abi_ulong frame_addr; @@ -1446,7 +1522,6 @@ long do_rt_sigreturn_v2(CPUState *env) { abi_ulong frame_addr; struct rt_sigframe_v2 *frame; - sigset_t host_set; /* * Since we stacked the signal on a 64-bit boundary, @@ -1460,20 +1535,9 @@ long do_rt_sigreturn_v2(CPUState *env) if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) goto badframe; - target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); - 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_v2, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; + if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) + 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]; |