diff options
Diffstat (limited to 'arch/um')
29 files changed, 145 insertions, 649 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile index 6430a63..c58b657 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -47,13 +47,16 @@ ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include endif SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) -# -Dvmap=kernel_vmap affects everything, and prevents anything from -# referencing the libpcap.o symbol so named. +# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so +# named - it's a common symbol in libpcap, so we get a binary which crashes. # -# Same things for in6addr_loopback - found in libc. +# Same things for in6addr_loopback and mktime - found in libc. For these two we +# only get link-time error, luckily. +# +# These apply to USER_CFLAGS to. -CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ - $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ +CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ + $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ -Din6addr_loopback=kernel_in6addr_loopback AFLAGS += $(ARCH_INCLUDE) @@ -66,6 +69,7 @@ USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ # kernel_errno to separate them from the libc errno. This allows -fno-common # in CFLAGS. Otherwise, it would cause ld to complain about the two different # errnos. +# These apply to kernelspace only. CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ -Dmktime=kernel_mktime @@ -168,10 +172,13 @@ else $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch endif -$(ARCH_DIR)/include/sysdep: +$(objtree)/$(ARCH_DIR)/include: + @echo ' MKDIR $@' + $(Q)mkdir -p $@ + +$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) - $(Q)mkdir -p $(ARCH_DIR)/include $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep else $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep @@ -214,7 +221,7 @@ $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s CLEAN_FILES += $(ARCH_DIR)/user-offsets.s -$(ARCH_DIR)/include/kern_constants.h: +$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include @echo ' SYMLINK $@' $(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@ diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index ab0d0b1..7218c75 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -403,7 +403,7 @@ int chan_window_size(struct list_head *chans, unsigned short *rows_out, return 0; } -void free_one_chan(struct chan *chan, int delay_free_irq) +static void free_one_chan(struct chan *chan, int delay_free_irq) { list_del(&chan->list); @@ -416,7 +416,7 @@ void free_one_chan(struct chan *chan, int delay_free_irq) kfree(chan); } -void free_chan(struct list_head *chans, int delay_free_irq) +static void free_chan(struct list_head *chans, int delay_free_irq) { struct list_head *ele, *next; struct chan *chan; @@ -497,7 +497,7 @@ struct chan_type { struct chan_ops *ops; }; -struct chan_type chan_table[] = { +static struct chan_type chan_table[] = { { "fd", &fd_ops }, #ifdef CONFIG_NULL_CHAN diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c index 5d50d4a..2f880cb 100644 --- a/arch/um/drivers/chan_user.c +++ b/arch/um/drivers/chan_user.c @@ -9,6 +9,7 @@ #include <termios.h> #include <string.h> #include <signal.h> +#include <sched.h> #include <sys/stat.h> #include <sys/ioctl.h> #include <sys/socket.h> @@ -73,7 +74,6 @@ static void winch_handler(int sig) struct winch_data { int pty_fd; int pipe_fd; - int close_me; }; static int winch_thread(void *arg) @@ -84,7 +84,6 @@ static int winch_thread(void *arg) int count, err; char c = 1; - os_close_file(data->close_me); pty_fd = data->pty_fd; pipe_fd = data->pipe_fd; count = os_write_file(pipe_fd, &c, sizeof(c)); @@ -153,15 +152,16 @@ static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out) } data = ((struct winch_data) { .pty_fd = fd, - .pipe_fd = fds[1], - .close_me = fds[0] } ); - err = run_helper_thread(winch_thread, &data, 0, &stack, 0); + .pipe_fd = fds[1] } ); + /* CLONE_FILES so this thread doesn't hold open files which are open + * now, but later closed. This is a problem with /dev/net/tun. + */ + err = run_helper_thread(winch_thread, &data, CLONE_FILES, &stack, 0); if(err < 0){ printk("fork of winch_thread failed - errno = %d\n", errno); goto out_close; } - os_close_file(fds[1]); *fd_out = fds[0]; n = os_read_file(fds[0], &c, sizeof(c)); if(n != sizeof(c)){ @@ -169,13 +169,12 @@ static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out) printk("read failed, err = %d\n", -n); printk("fd %d will not support SIGWINCH\n", fd); err = -EINVAL; - goto out_close1; + goto out_close; } return err ; out_close: os_close_file(fds[1]); - out_close1: os_close_file(fds[0]); out: return err; diff --git a/arch/um/drivers/daemon_kern.c b/arch/um/drivers/daemon_kern.c index 507e3cb..a61b7b4 100644 --- a/arch/um/drivers/daemon_kern.c +++ b/arch/um/drivers/daemon_kern.c @@ -18,7 +18,7 @@ struct daemon_init { char *ctl_sock; }; -void daemon_init(struct net_device *dev, void *data) +static void daemon_init(struct net_device *dev, void *data) { struct uml_net_private *pri; struct daemon_data *dpri; @@ -64,7 +64,7 @@ static struct net_kern_info daemon_kern_info = { .write = daemon_write, }; -int daemon_setup(char *str, char **mac_out, void *data) +static int daemon_setup(char *str, char **mac_out, void *data) { struct daemon_init *init = data; char *remain; diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 46ceb25..6c2d4cc 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -714,7 +714,7 @@ struct winch { struct tty_struct *tty; }; -irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused) +static irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused) { struct winch *winch = data; struct tty_struct *tty; diff --git a/arch/um/drivers/mcast_kern.c b/arch/um/drivers/mcast_kern.c index 217438c..c9b078f 100644 --- a/arch/um/drivers/mcast_kern.c +++ b/arch/um/drivers/mcast_kern.c @@ -26,7 +26,7 @@ struct mcast_init { int ttl; }; -void mcast_init(struct net_device *dev, void *data) +static void mcast_init(struct net_device *dev, void *data) { struct uml_net_private *pri; struct mcast_data *dpri; @@ -40,7 +40,7 @@ void mcast_init(struct net_device *dev, void *data) dpri->dev = dev; printk("mcast backend "); - printk("multicast adddress: %s:%u, TTL:%u ", + printk("multicast address: %s:%u, TTL:%u ", dpri->addr, dpri->port, dpri->ttl); printk("\n"); diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index e3d5765..54388d1 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -273,7 +273,7 @@ void mconsole_proc(struct mc_request *req) config <dev> - Query the configuration of a device \n\ remove <dev> - Remove a device from UML \n\ sysrq <letter> - Performs the SysRq action controlled by the letter \n\ - cad - invoke the Ctl-Alt-Del handler \n\ + cad - invoke the Ctrl-Alt-Del handler \n\ stop - pause the UML; it will do nothing until it receives a 'go' \n\ go - continue the UML after a 'stop' \n\ log <string> - make UML enter <string> into the kernel log\n\ @@ -327,7 +327,7 @@ void mconsole_stop(struct mc_request *req) /* This list is populated by __initcall routines. */ -LIST_HEAD(mconsole_devices); +static LIST_HEAD(mconsole_devices); void mconsole_register_dev(struct mc_device *new) { @@ -561,6 +561,8 @@ void mconsole_sysrq(struct mc_request *req) } #endif +#ifdef CONFIG_MODE_SKAS + static void stack_proc(void *arg) { struct task_struct *from = current, *to = arg; @@ -574,7 +576,7 @@ static void stack_proc(void *arg) * Dumps a stacks registers to the linux console. * Usage stack <pid>. */ -void do_stack(struct mc_request *req) +static void do_stack_trace(struct mc_request *req) { char *ptr = req->request.data; int pid_requested= -1; @@ -605,6 +607,7 @@ void do_stack(struct mc_request *req) } with_console(req, stack_proc, to); } +#endif /* CONFIG_MODE_SKAS */ void mconsole_stack(struct mc_request *req) { @@ -613,7 +616,7 @@ void mconsole_stack(struct mc_request *req) */ CHOOSE_MODE(mconsole_reply(req, "Sorry, this doesn't work in TT mode", 1, 0), - do_stack(req)); + do_stack_trace(req)); } /* Changed by mconsole_setup, which is __setup, and called before SMP is diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 8ebb224..8c7279b 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -131,9 +131,8 @@ static int uml_net_open(struct net_device *dev) SA_INTERRUPT | SA_SHIRQ, dev->name, dev); if(err != 0){ printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); - if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); - lp->fd = -1; err = -ENETUNREACH; + goto out_close; } lp->tl.data = (unsigned long) &lp->user; @@ -145,9 +144,19 @@ static int uml_net_open(struct net_device *dev) */ while((err = uml_net_rx(dev)) > 0) ; - out: spin_unlock(&lp->lock); - return(err); + + spin_lock(&opened_lock); + list_add(&lp->list, &opened); + spin_unlock(&opened_lock); + + return 0; +out_close: + if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); + lp->fd = -1; +out: + spin_unlock(&lp->lock); + return err; } static int uml_net_close(struct net_device *dev) @@ -161,9 +170,13 @@ static int uml_net_close(struct net_device *dev) if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); lp->fd = -1; - list_del(&lp->list); spin_unlock(&lp->lock); + + spin_lock(&opened_lock); + list_del(&lp->list); + spin_unlock(&opened_lock); + return 0; } @@ -410,11 +423,7 @@ static int eth_configure(int n, void *init, char *mac, if (device->have_mac) set_ether_mac(dev, device->mac); - spin_lock(&opened_lock); - list_add(&lp->list, &opened); - spin_unlock(&opened_lock); - - return(0); + return 0; } static struct uml_net *find_device(int n) diff --git a/arch/um/drivers/slip_common.h b/arch/um/drivers/slip_common.h index 2ae76d8..d574e0a 100644 --- a/arch/um/drivers/slip_common.h +++ b/arch/um/drivers/slip_common.h @@ -88,12 +88,13 @@ struct slip_proto { int esc; }; -#define SLIP_PROTO_INIT { \ - .ibuf = { '\0' }, \ - .obuf = { '\0' }, \ - .more = 0, \ - .pos = 0, \ - .esc = 0 \ +static inline void slip_proto_init(struct slip_proto * slip) +{ + memset(slip->ibuf, 0, sizeof(slip->ibuf)); + memset(slip->obuf, 0, sizeof(slip->obuf)); + slip->more = 0; + slip->pos = 0; + slip->esc = 0; } extern int slip_proto_read(int fd, void *buf, int len, diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c index 9a6f5c8..a62f5ef 100644 --- a/arch/um/drivers/slip_kern.c +++ b/arch/um/drivers/slip_kern.c @@ -21,13 +21,14 @@ void slip_init(struct net_device *dev, void *data) private = dev->priv; spri = (struct slip_data *) private->user; - *spri = ((struct slip_data) - { .name = { '\0' }, - .addr = NULL, - .gate_addr = init->gate_addr, - .slave = -1, - .slip = SLIP_PROTO_INIT, - .dev = dev }); + + memset(spri->name, 0, sizeof(spri->name)); + spri->addr = NULL; + spri->gate_addr = init->gate_addr; + spri->slave = -1; + spri->dev = dev; + + slip_proto_init(&spri->slip); dev->init = NULL; dev->header_cache_update = NULL; diff --git a/arch/um/drivers/slirp_kern.c b/arch/um/drivers/slirp_kern.c index 9864d27..33d7982 100644 --- a/arch/um/drivers/slirp_kern.c +++ b/arch/um/drivers/slirp_kern.c @@ -21,12 +21,13 @@ void slirp_init(struct net_device *dev, void *data) private = dev->priv; spri = (struct slirp_data *) private->user; - *spri = ((struct slirp_data) - { .argw = init->argw, - .pid = -1, - .slave = -1, - .slip = SLIP_PROTO_INIT, - .dev = dev }); + + spri->argw = init->argw; + spri->pid = -1; + spri->slave = -1; + spri->dev = dev; + + slip_proto_init(&spri->slip); dev->init = NULL; dev->hard_header_len = 0; diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c index a32ef55..a4d6415 100644 --- a/arch/um/drivers/ssl.c +++ b/arch/um/drivers/ssl.c @@ -33,7 +33,7 @@ static struct tty_driver *ssl_driver; #define NR_PORTS 64 -void ssl_announce(char *dev_name, int dev) +static void ssl_announce(char *dev_name, int dev) { printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev, dev_name); @@ -98,7 +98,7 @@ static int ssl_remove(int n) return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n); } -int ssl_open(struct tty_struct *tty, struct file *filp) +static int ssl_open(struct tty_struct *tty, struct file *filp) { return line_open(serial_lines, tty); } @@ -182,7 +182,7 @@ static struct console ssl_cons = { .index = -1, }; -int ssl_init(void) +static int ssl_init(void) { char *new_title; diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h index c649108..07176d9 100644 --- a/arch/um/include/kern_util.h +++ b/arch/um/include/kern_util.h @@ -31,8 +31,6 @@ extern int timer_irq_inited; extern int jail; extern int nsyscalls; -extern struct task_struct *idle_threads[NR_CPUS]; - #define UML_ROUND_DOWN(addr) ((void *)(((unsigned long) addr) & PAGE_MASK)) #define UML_ROUND_UP(addr) \ UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1) diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h index 4892e5f..83b688c 100644 --- a/arch/um/include/registers.h +++ b/arch/um/include/registers.h @@ -14,7 +14,7 @@ extern int restore_fp_registers(int pid, unsigned long *fp_regs); extern void save_registers(int pid, union uml_pt_regs *regs); extern void restore_registers(int pid, union uml_pt_regs *regs); extern void init_registers(int pid); -extern void get_safe_registers(unsigned long * regs); +extern void get_safe_registers(unsigned long * regs, unsigned long * fp_regs); extern void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer); #endif diff --git a/arch/um/kernel/exec_kern.c b/arch/um/kernel/exec_kern.c index 569fe8b..c264e1c 100644 --- a/arch/um/kernel/exec_kern.c +++ b/arch/um/kernel/exec_kern.c @@ -33,7 +33,7 @@ void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) extern void log_exec(char **argv, void *tty); static long execve1(char *file, char __user * __user *argv, - char *__user __user *env) + char __user *__user *env) { long error; diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index f3b583a..544665e 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -265,7 +265,7 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) highmem_len = highmem_pages * sizeof(struct page); total_pages = phys_pages + iomem_pages + highmem_pages; - total_len = phys_len + iomem_pages + highmem_len; + total_len = phys_len + iomem_len + highmem_len; if(kmalloc_ok){ map = kmalloc(total_len, GFP_KERNEL); diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c index 6f1a3a2..3ef73bf 100644 --- a/arch/um/kernel/reboot.c +++ b/arch/um/kernel/reboot.c @@ -5,6 +5,7 @@ #include "linux/module.h" #include "linux/sched.h" +#include "asm/smp.h" #include "user_util.h" #include "kern_util.h" #include "kern.h" diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c deleted file mode 100644 index eea1c9c4..0000000 --- a/arch/um/kernel/skas/process.c +++ /dev/null @@ -1,569 +0,0 @@ -/* - * Copyright (C) 2002- 2004 Jeff Dike (jdike@addtoit.com) - * Licensed under the GPL - */ - -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <errno.h> -#include <signal.h> -#include <setjmp.h> -#include <sched.h> -#include <sys/wait.h> -#include <sys/mman.h> -#include <sys/user.h> -#include <sys/time.h> -#include <asm/unistd.h> -#include <asm/types.h> -#include "user.h" -#include "ptrace_user.h" -#include "sysdep/ptrace.h" -#include "user_util.h" -#include "kern_util.h" -#include "skas.h" -#include "stub-data.h" -#include "mm_id.h" -#include "sysdep/sigcontext.h" -#include "sysdep/stub.h" -#include "os.h" -#include "proc_mm.h" -#include "skas_ptrace.h" -#include "chan_user.h" -#include "registers.h" -#include "mem.h" -#include "uml-config.h" -#include "process.h" - -int is_skas_winch(int pid, int fd, void *data) -{ - if(pid != os_getpgrp()) - return(0); - - register_winch_irq(-1, fd, -1, data); - return(1); -} - -void wait_stub_done(int pid, int sig, char * fname) -{ - int n, status, err; - - do { - if ( sig != -1 ) { - err = ptrace(PTRACE_CONT, pid, 0, sig); - if(err) - panic("%s : continue failed, errno = %d\n", - fname, errno); - } - sig = 0; - - CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - } while((n >= 0) && WIFSTOPPED(status) && - ((WSTOPSIG(status) == SIGVTALRM) || - /* running UML inside a detached screen can cause - * SIGWINCHes - */ - (WSTOPSIG(status) == SIGWINCH))); - - if((n < 0) || !WIFSTOPPED(status) || - (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){ - unsigned long regs[HOST_FRAME_SIZE]; - if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) - printk("Failed to get registers from stub, " - "errno = %d\n", errno); - else { - int i; - - printk("Stub registers -\n"); - for(i = 0; i < HOST_FRAME_SIZE; i++) - printk("\t%d - %lx\n", i, regs[i]); - } - panic("%s : failed to wait for SIGUSR1/SIGTRAP, " - "pid = %d, n = %d, errno = %d, status = 0x%x\n", - fname, pid, n, errno, status); - } -} - -void get_skas_faultinfo(int pid, struct faultinfo * fi) -{ - int err; - - if(ptrace_faultinfo){ - err = ptrace(PTRACE_FAULTINFO, pid, 0, fi); - if(err) - panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, " - "errno = %d\n", errno); - - /* Special handling for i386, which has different structs */ - if (sizeof(struct ptrace_faultinfo) < sizeof(struct faultinfo)) - memset((char *)fi + sizeof(struct ptrace_faultinfo), 0, - sizeof(struct faultinfo) - - sizeof(struct ptrace_faultinfo)); - } - else { - wait_stub_done(pid, SIGSEGV, "get_skas_faultinfo"); - - /* faultinfo is prepared by the stub-segv-handler at start of - * the stub stack page. We just have to copy it. - */ - memcpy(fi, (void *)current_stub_stack(), sizeof(*fi)); - } -} - -static void handle_segv(int pid, union uml_pt_regs * regs) -{ - get_skas_faultinfo(pid, ®s->skas.faultinfo); - segv(regs->skas.faultinfo, 0, 1, NULL); -} - -/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/ -static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu) -{ - int err, status; - - /* Mark this as a syscall */ - UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->skas.regs); - - if (!local_using_sysemu) - { - err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_getpid); - if(err < 0) - panic("handle_trap - nullifying syscall failed errno = %d\n", - errno); - - err = ptrace(PTRACE_SYSCALL, pid, 0, 0); - if(err < 0) - panic("handle_trap - continuing to end of syscall failed, " - "errno = %d\n", errno); - - CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if((err < 0) || !WIFSTOPPED(status) || - (WSTOPSIG(status) != SIGTRAP + 0x80)) - panic("handle_trap - failed to wait at end of syscall, " - "errno = %d, status = %d\n", errno, status); - } - - handle_syscall(regs); -} - -extern int __syscall_stub_start; -int stub_code_fd = -1; -__u64 stub_code_offset; - -static int userspace_tramp(void *stack) -{ - void *addr; - - ptrace(PTRACE_TRACEME, 0, 0, 0); - - init_new_thread_signals(1); - enable_timer(); - - if(!proc_mm){ - /* This has a pte, but it can't be mapped in with the usual - * tlb_flush mechanism because this is part of that mechanism - */ - addr = mmap64((void *) UML_CONFIG_STUB_CODE, page_size(), - PROT_EXEC, MAP_FIXED | MAP_PRIVATE, - stub_code_fd, stub_code_offset); - if(addr == MAP_FAILED){ - printk("mapping stub code failed, errno = %d\n", - errno); - exit(1); - } - - if(stack != NULL){ - int fd; - __u64 offset; - - fd = phys_mapping(to_phys(stack), &offset); - addr = mmap((void *) UML_CONFIG_STUB_DATA, page_size(), - PROT_READ | PROT_WRITE, - MAP_FIXED | MAP_SHARED, fd, offset); - if(addr == MAP_FAILED){ - printk("mapping stub stack failed, " - "errno = %d\n", errno); - exit(1); - } - } - } - if(!ptrace_faultinfo){ - unsigned long v = UML_CONFIG_STUB_CODE + - (unsigned long) stub_segv_handler - - (unsigned long) &__syscall_stub_start; - - set_sigstack((void *) UML_CONFIG_STUB_DATA, page_size()); - set_handler(SIGSEGV, (void *) v, SA_ONSTACK, - SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, - SIGUSR1, -1); - } - - os_stop_process(os_getpid()); - return(0); -} - -/* Each element set once, and only accessed by a single processor anyway */ -#undef NR_CPUS -#define NR_CPUS 1 -int userspace_pid[NR_CPUS]; - -int start_userspace(unsigned long stub_stack) -{ - void *stack; - unsigned long sp; - int pid, status, n, flags; - - if ( stub_code_fd == -1 ) - stub_code_fd = phys_mapping(to_phys(&__syscall_stub_start), - &stub_code_offset); - - stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if(stack == MAP_FAILED) - panic("start_userspace : mmap failed, errno = %d", errno); - sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *); - - flags = CLONE_FILES | SIGCHLD; - if(proc_mm) flags |= CLONE_VM; - pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack); - if(pid < 0) - panic("start_userspace : clone failed, errno = %d", errno); - - do { - CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) - panic("start_userspace : wait failed, errno = %d", - errno); - } while(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM)); - - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) - panic("start_userspace : expected SIGSTOP, got status = %d", - status); - - if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, (void *)PTRACE_O_TRACESYSGOOD) < 0) - panic("start_userspace : PTRACE_SETOPTIONS failed, errno=%d\n", - errno); - - if(munmap(stack, PAGE_SIZE) < 0) - panic("start_userspace : munmap failed, errno = %d\n", errno); - - return(pid); -} - -void userspace(union uml_pt_regs *regs) -{ - int err, status, op, pid = userspace_pid[0]; - int local_using_sysemu; /*To prevent races if using_sysemu changes under us.*/ - - while(1){ - restore_registers(pid, regs); - - /* Now we set local_using_sysemu to be used for one loop */ - local_using_sysemu = get_using_sysemu(); - - op = SELECT_PTRACE_OPERATION(local_using_sysemu, singlestepping(NULL)); - - err = ptrace(op, pid, 0, 0); - if(err) - panic("userspace - could not resume userspace process, " - "pid=%d, ptrace operation = %d, errno = %d\n", - op, errno); - - CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if(err < 0) - panic("userspace - waitpid failed, errno = %d\n", - errno); - - regs->skas.is_user = 1; - save_registers(pid, regs); - UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */ - - if(WIFSTOPPED(status)){ - switch(WSTOPSIG(status)){ - case SIGSEGV: - if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo) - user_signal(SIGSEGV, regs, pid); - else handle_segv(pid, regs); - break; - case SIGTRAP + 0x80: - handle_trap(pid, regs, local_using_sysemu); - break; - case SIGTRAP: - relay_signal(SIGTRAP, regs); - break; - case SIGIO: - case SIGVTALRM: - case SIGILL: - case SIGBUS: - case SIGFPE: - case SIGWINCH: - user_signal(WSTOPSIG(status), regs, pid); - break; - default: - printk("userspace - child stopped with signal " - "%d\n", WSTOPSIG(status)); - } - pid = userspace_pid[0]; - interrupt_end(); - - /* Avoid -ERESTARTSYS handling in host */ - PT_SYSCALL_NR(regs->skas.regs) = -1; - } - } -} -#define INIT_JMP_NEW_THREAD 0 -#define INIT_JMP_REMOVE_SIGSTACK 1 -#define INIT_JMP_CALLBACK 2 -#define INIT_JMP_HALT 3 -#define INIT_JMP_REBOOT 4 - - -int copy_context_skas0(unsigned long new_stack, int pid) -{ - int err; - unsigned long regs[MAX_REG_NR]; - unsigned long current_stack = current_stub_stack(); - struct stub_data *data = (struct stub_data *) current_stack; - struct stub_data *child_data = (struct stub_data *) new_stack; - __u64 new_offset; - int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset); - - /* prepare offset and fd of child's stack as argument for parent's - * and child's mmap2 calls - */ - *data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset), - .fd = new_fd, - .timer = ((struct itimerval) - { { 0, 1000000 / hz() }, - { 0, 1000000 / hz() }})}); - get_safe_registers(regs); - - /* Set parent's instruction pointer to start of clone-stub */ - regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + - (unsigned long) stub_clone_handler - - (unsigned long) &__syscall_stub_start; - regs[REGS_SP_INDEX] = UML_CONFIG_STUB_DATA + PAGE_SIZE - - sizeof(void *); - err = ptrace_setregs(pid, regs); - if(err < 0) - panic("copy_context_skas0 : PTRACE_SETREGS failed, " - "pid = %d, errno = %d\n", pid, errno); - - /* set a well known return code for detection of child write failure */ - child_data->err = 12345678; - - /* Wait, until parent has finished its work: read child's pid from - * parent's stack, and check, if bad result. - */ - wait_stub_done(pid, 0, "copy_context_skas0"); - - pid = data->err; - if(pid < 0) - panic("copy_context_skas0 - stub-parent reports error %d\n", - pid); - - /* Wait, until child has finished too: read child's result from - * child's stack and check it. - */ - wait_stub_done(pid, -1, "copy_context_skas0"); - if (child_data->err != UML_CONFIG_STUB_DATA) - panic("copy_context_skas0 - stub-child reports error %d\n", - child_data->err); - - if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, - (void *)PTRACE_O_TRACESYSGOOD) < 0) - panic("copy_context_skas0 : PTRACE_SETOPTIONS failed, " - "errno = %d\n", errno); - - return pid; -} - -/* - * This is used only, if stub pages are needed, while proc_mm is - * availabl. Opening /proc/mm creates a new mm_context, which lacks - * the stub-pages. Thus, we map them using /proc/mm-fd - */ -void map_stub_pages(int fd, unsigned long code, - unsigned long data, unsigned long stack) -{ - struct proc_mm_op mmop; - int n; - - mmop = ((struct proc_mm_op) { .op = MM_MMAP, - .u = - { .mmap = - { .addr = code, - .len = PAGE_SIZE, - .prot = PROT_EXEC, - .flags = MAP_FIXED | MAP_PRIVATE, - .fd = stub_code_fd, - .offset = stub_code_offset - } } }); - n = os_write_file(fd, &mmop, sizeof(mmop)); - if(n != sizeof(mmop)) - panic("map_stub_pages : /proc/mm map for code failed, " - "err = %d\n", -n); - - if ( stack ) { - __u64 map_offset; - int map_fd = phys_mapping(to_phys((void *)stack), &map_offset); - mmop = ((struct proc_mm_op) - { .op = MM_MMAP, - .u = - { .mmap = - { .addr = data, - .len = PAGE_SIZE, - .prot = PROT_READ | PROT_WRITE, - .flags = MAP_FIXED | MAP_SHARED, - .fd = map_fd, - .offset = map_offset - } } }); - n = os_write_file(fd, &mmop, sizeof(mmop)); - if(n != sizeof(mmop)) - panic("map_stub_pages : /proc/mm map for data failed, " - "err = %d\n", -n); - } -} - -void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr, - void (*handler)(int)) -{ - unsigned long flags; - sigjmp_buf switch_buf, fork_buf; - - *switch_buf_ptr = &switch_buf; - *fork_buf_ptr = &fork_buf; - - /* Somewhat subtle - siglongjmp restores the signal mask before doing - * the longjmp. This means that when jumping from one stack to another - * when the target stack has interrupts enabled, an interrupt may occur - * on the source stack. This is bad when starting up a process because - * it's not supposed to get timer ticks until it has been scheduled. - * So, we disable interrupts around the sigsetjmp to ensure that - * they can't happen until we get back here where they are safe. - */ - flags = get_signals(); - block_signals(); - if(sigsetjmp(fork_buf, 1) == 0) - new_thread_proc(stack, handler); - - remove_sigstack(); - - set_signals(flags); -} - -void thread_wait(void *sw, void *fb) -{ - sigjmp_buf buf, **switch_buf = sw, *fork_buf; - - *switch_buf = &buf; - fork_buf = fb; - if(sigsetjmp(buf, 1) == 0) - siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK); -} - -void switch_threads(void *me, void *next) -{ - sigjmp_buf my_buf, **me_ptr = me, *next_buf = next; - - *me_ptr = &my_buf; - if(sigsetjmp(my_buf, 1) == 0) - siglongjmp(*next_buf, 1); -} - -static sigjmp_buf initial_jmpbuf; - -/* XXX Make these percpu */ -static void (*cb_proc)(void *arg); -static void *cb_arg; -static sigjmp_buf *cb_back; - -int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr) -{ - sigjmp_buf **switch_buf = switch_buf_ptr; - int n; - - set_handler(SIGWINCH, (__sighandler_t) sig_handler, - SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM, - SIGVTALRM, -1); - - *fork_buf_ptr = &initial_jmpbuf; - n = sigsetjmp(initial_jmpbuf, 1); - switch(n){ - case INIT_JMP_NEW_THREAD: - new_thread_proc((void *) stack, new_thread_handler); - break; - case INIT_JMP_REMOVE_SIGSTACK: - remove_sigstack(); - break; - case INIT_JMP_CALLBACK: - (*cb_proc)(cb_arg); - siglongjmp(*cb_back, 1); - break; - case INIT_JMP_HALT: - kmalloc_ok = 0; - return(0); - case INIT_JMP_REBOOT: - kmalloc_ok = 0; - return(1); - default: - panic("Bad sigsetjmp return in start_idle_thread - %d\n", n); - } - siglongjmp(**switch_buf, 1); -} - -void initial_thread_cb_skas(void (*proc)(void *), void *arg) -{ - sigjmp_buf here; - - cb_proc = proc; - cb_arg = arg; - cb_back = &here; - - block_signals(); - if(sigsetjmp(here, 1) == 0) - siglongjmp(initial_jmpbuf, INIT_JMP_CALLBACK); - unblock_signals(); - - cb_proc = NULL; - cb_arg = NULL; - cb_back = NULL; -} - -void halt_skas(void) -{ - block_signals(); - siglongjmp(initial_jmpbuf, INIT_JMP_HALT); -} - -void reboot_skas(void) -{ - block_signals(); - siglongjmp(initial_jmpbuf, INIT_JMP_REBOOT); -} - -void switch_mm_skas(struct mm_id *mm_idp) -{ - int err; - -#warning need cpu pid in switch_mm_skas - if(proc_mm){ - err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0, - mm_idp->u.mm_fd); - if(err) - panic("switch_mm_skas - PTRACE_SWITCH_MM failed, " - "errno = %d\n", errno); - } - else userspace_pid[0] = mm_idp->u.pid; -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c index 3d29c90..3fda9a0 100644 --- a/arch/um/kernel/tt/syscall_kern.c +++ b/arch/um/kernel/tt/syscall_kern.c @@ -23,16 +23,20 @@ void syscall_handler_tt(int sig, struct pt_regs *regs) int syscall; #ifdef CONFIG_SYSCALL_DEBUG int index; - index = record_syscall_start(syscall); #endif sc = UPT_SC(®s->regs); SC_START_SYSCALL(sc); + syscall = UPT_SYSCALL_NR(®s->regs); + +#ifdef CONFIG_SYSCALL_DEBUG + index = record_syscall_start(syscall); +#endif + syscall_trace(®s->regs, 0); current->thread.nsyscalls++; nsyscalls++; - syscall = UPT_SYSCALL_NR(®s->regs); if((syscall >= NR_syscalls) || (syscall < 0)) result = -ENOSYS; diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index e2d3ca4..27cdf91 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -193,6 +193,24 @@ __uml_setup("root=", uml_root_setup, " root=/dev/ubd5\n\n" ); +#ifndef CONFIG_MODE_TT + +static int __init no_skas_debug_setup(char *line, int *add) +{ + printf("'debug' is not necessary to gdb UML in skas mode - run \n"); + printf("'gdb linux' and disable CONFIG_CMDLINE_ON_HOST if gdb \n"); + printf("doesn't work as expected\n"); + + return 0; +} + +__uml_setup("debug", no_skas_debug_setup, +"debug\n" +" this flag is not needed to run gdb on UML in skas mode\n\n" +); + +#endif + #ifdef CONFIG_SMP static int __init uml_ncpus_setup(char *line, int *add) { diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c index 5294533..87c3aa0 100644 --- a/arch/um/os-Linux/drivers/tuntap_user.c +++ b/arch/um/os-Linux/drivers/tuntap_user.c @@ -122,6 +122,7 @@ static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote, return(-EINVAL); } *fd_out = ((int *) CMSG_DATA(cmsg))[0]; + os_set_exec_close(*fd_out, 1); return(0); } @@ -137,7 +138,8 @@ static int tuntap_open(void *data) return(err); if(pri->fixed_config){ - pri->fd = os_open_file("/dev/net/tun", of_rdwr(OPENFLAGS()), 0); + pri->fd = os_open_file("/dev/net/tun", + of_cloexec(of_rdwr(OPENFLAGS())), 0); if(pri->fd < 0){ printk("Failed to open /dev/net/tun, err = %d\n", -pri->fd); diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c index 9890e90..fbb080c 100644 --- a/arch/um/os-Linux/skas/mem.c +++ b/arch/um/os-Linux/skas/mem.c @@ -60,7 +60,7 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) multi_count++; - get_safe_registers(regs); + get_safe_registers(regs, NULL); regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + ((unsigned long) &batch_syscall_stub - (unsigned long) &__syscall_stub_start); diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 120a21c..bbf34cb 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -310,16 +310,12 @@ void userspace(union uml_pt_regs *regs) } } } -#define INIT_JMP_NEW_THREAD 0 -#define INIT_JMP_REMOVE_SIGSTACK 1 -#define INIT_JMP_CALLBACK 2 -#define INIT_JMP_HALT 3 -#define INIT_JMP_REBOOT 4 int copy_context_skas0(unsigned long new_stack, int pid) { int err; - unsigned long regs[MAX_REG_NR]; + unsigned long regs[HOST_FRAME_SIZE]; + unsigned long fp_regs[HOST_FP_SIZE]; unsigned long current_stack = current_stub_stack(); struct stub_data *data = (struct stub_data *) current_stack; struct stub_data *child_data = (struct stub_data *) new_stack; @@ -334,7 +330,7 @@ int copy_context_skas0(unsigned long new_stack, int pid) .timer = ((struct itimerval) { { 0, 1000000 / hz() }, { 0, 1000000 / hz() }})}); - get_safe_registers(regs); + get_safe_registers(regs, fp_regs); /* Set parent's instruction pointer to start of clone-stub */ regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + @@ -350,6 +346,11 @@ int copy_context_skas0(unsigned long new_stack, int pid) panic("copy_context_skas0 : PTRACE_SETREGS failed, " "pid = %d, errno = %d\n", pid, errno); + err = ptrace_setfpregs(pid, fp_regs); + if(err < 0) + panic("copy_context_skas0 : PTRACE_SETFPREGS failed, " + "pid = %d, errno = %d\n", pid, errno); + /* set a well known return code for detection of child write failure */ child_data->err = 12345678; @@ -457,6 +458,12 @@ void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr, set_signals(flags); } +#define INIT_JMP_NEW_THREAD 0 +#define INIT_JMP_REMOVE_SIGSTACK 1 +#define INIT_JMP_CALLBACK 2 +#define INIT_JMP_HALT 3 +#define INIT_JMP_REBOOT 4 + void thread_wait(void *sw, void *fb) { sigjmp_buf buf, **switch_buf = sw, *fork_buf; diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index 6c5b17e..829d6b0 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -49,6 +49,7 @@ static int ptrace_child(void *arg) int pid = os_getpid(), ppid = getppid(); int sc_result; + change_sig(SIGWINCH, 0); if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){ perror("ptrace"); os_kill_process(pid, 0); diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c index aee4812..7a6f6b9 100644 --- a/arch/um/os-Linux/sys-i386/registers.c +++ b/arch/um/os-Linux/sys-i386/registers.c @@ -122,9 +122,12 @@ void init_registers(int pid) err); } -void get_safe_registers(unsigned long *regs) +void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) { memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long)); + if(fp_regs != NULL) + memcpy(fp_regs, exec_fp_regs, + HOST_FP_SIZE * sizeof(unsigned long)); } void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c index 4b638dfb..001941f 100644 --- a/arch/um/os-Linux/sys-x86_64/registers.c +++ b/arch/um/os-Linux/sys-x86_64/registers.c @@ -70,9 +70,12 @@ void init_registers(int pid) err); } -void get_safe_registers(unsigned long *regs) +void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) { memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long)); + if(fp_regs != NULL) + memcpy(fp_regs, exec_fp_regs, + HOST_FP_SIZE * sizeof(unsigned long)); } void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index 0cdfd44..1fa09a7 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -16,7 +16,6 @@ #include "choose-mode.h" #include "kern.h" #include "mode_kern.h" -#include "proc_mm.h" #include "os.h" extern int modify_ldt(int func, void *ptr, unsigned long bytecount); @@ -90,6 +89,7 @@ out: #include "skas.h" #include "skas_ptrace.h" #include "asm/mmu_context.h" +#include "proc_mm.h" long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, void **addr, int done) diff --git a/arch/um/sys-x86_64/ptrace_user.c b/arch/um/sys-x86_64/ptrace_user.c index 12e404c..b5f9c33 100644 --- a/arch/um/sys-x86_64/ptrace_user.c +++ b/arch/um/sys-x86_64/ptrace_user.c @@ -24,6 +24,13 @@ int ptrace_setregs(long pid, unsigned long *regs) return(0); } +int ptrace_setfpregs(long pid, unsigned long *regs) +{ + if (ptrace(PTRACE_SETFPREGS, pid, 0, regs) < 0) + return -errno; + return 0; +} + void ptrace_pokeuser(unsigned long addr, unsigned long data) { panic("ptrace_pokeuser"); diff --git a/arch/um/sys-x86_64/user-offsets.c b/arch/um/sys-x86_64/user-offsets.c index 5a585bf..7bd54a9 100644 --- a/arch/um/sys-x86_64/user-offsets.c +++ b/arch/um/sys-x86_64/user-offsets.c @@ -57,7 +57,7 @@ void foo(void) #endif DEFINE_LONGS(HOST_FRAME_SIZE, FRAME_SIZE); - DEFINE(HOST_FP_SIZE, 0); + DEFINE(HOST_FP_SIZE, sizeof(struct _fpstate) / sizeof(unsigned long)); DEFINE(HOST_XFP_SIZE, 0); DEFINE_LONGS(HOST_RBX, RBX); DEFINE_LONGS(HOST_RCX, RCX); |
