#include <linux/stddef.h>
#include <linux/personality.h>
#include <linux/suspend.h>
+#include <linux/ptrace.h>
#include <linux/elf.h>
#include <asm/processor.h>
#include <asm/ucontext.h>
}
asmlinkage int
-sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize)
+sys_rt_sigsuspend(struct pt_regs regs)
{
- struct pt_regs * regs = (struct pt_regs *) &unewset;
sigset_t saveset, newset;
/* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
+ if (regs.ecx != sizeof(sigset_t))
return -EINVAL;
- if (copy_from_user(&newset, unewset, sizeof(newset)))
+ if (copy_from_user(&newset, (sigset_t __user *)regs.ebx, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- regs->eax = -EINTR;
+ regs.eax = -EINTR;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
- if (do_signal(regs, &saveset))
+ if (do_signal(®s, &saveset))
return -EINTR;
}
}
}
asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
+sys_sigaltstack(unsigned long ebx)
{
- struct pt_regs *regs = (struct pt_regs *) &uss;
+ /* This is needed to make gcc realize it doesn't own the "struct pt_regs" */
+ struct pt_regs *regs = (struct pt_regs *)&ebx;
+ const stack_t __user *uss = (const stack_t __user *)ebx;
+ stack_t __user *uoss = (stack_t __user *)regs->ecx;
+
return do_sigaltstack(uss, uoss, regs->esp);
}
if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
goto badframe;
err |= restore_i387(buf);
+ } else {
+ struct task_struct *me = current;
+ if (used_math()) {
+ clear_fpu(me);
+ clear_used_math();
+ }
}
}
/* These symbols are defined with the addresses in the vsyscall page.
See vsyscall-sigreturn.S. */
-extern void __kernel_sigreturn, __kernel_rt_sigreturn;
+extern void __user __kernel_sigreturn;
+extern void __user __kernel_rt_sigreturn;
static void setup_frame(int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs * regs)
{
- void *restorer;
+ void __user *restorer;
struct sigframe __user *frame;
int err = 0;
+ int usig;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
- err |= __put_user((current_thread_info()->exec_domain
- && current_thread_info()->exec_domain->signal_invmap
- && sig < 32
- ? current_thread_info()->exec_domain->signal_invmap[sig]
- : sig),
- &frame->sig);
+ usig = current_thread_info()->exec_domain
+ && current_thread_info()->exec_domain->signal_invmap
+ && sig < 32
+ ? current_thread_info()->exec_domain->signal_invmap[sig]
+ : sig;
+
+ err = __put_user(usig, &frame->sig);
if (err)
goto give_sigsegv;
- err |= setup_sigcontext(&frame->sc, &frame->fpstate, regs, set->sig[0]);
+ err = setup_sigcontext(&frame->sc, &frame->fpstate, regs, set->sig[0]);
if (err)
goto give_sigsegv;
if (_NSIG_WORDS > 1) {
- err |= __copy_to_user(&frame->extramask, &set->sig[1],
+ err = __copy_to_user(&frame->extramask, &set->sig[1],
sizeof(frame->extramask));
+ if (err)
+ goto give_sigsegv;
}
- if (err)
- goto give_sigsegv;
restorer = &__kernel_sigreturn;
if (ka->sa.sa_flags & SA_RESTORER)
/* Set up registers for signal handler */
regs->esp = (unsigned long) frame;
regs->eip = (unsigned long) ka->sa.sa_handler;
+ regs->eax = (unsigned long) sig;
+ regs->edx = (unsigned long) 0;
+ regs->ecx = (unsigned long) 0;
set_fs(USER_DS);
regs->xds = __USER_DS;
regs->xes = __USER_DS;
regs->xss = __USER_DS;
regs->xcs = __USER_CS;
+
+ /*
+ * Clear TF when entering the signal handler, but
+ * notify any tracer that was single-stepping it.
+ * The tracer may want to single-step inside the
+ * handler too.
+ */
regs->eflags &= ~TF_MASK;
+ if (test_thread_flag(TIF_SINGLESTEP))
+ ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
return;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
}
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs * regs)
{
- void *restorer;
+ void __user *restorer;
struct rt_sigframe __user *frame;
int err = 0;
+ int usig;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
- err |= __put_user((current_thread_info()->exec_domain
- && current_thread_info()->exec_domain->signal_invmap
- && sig < 32
- ? current_thread_info()->exec_domain->signal_invmap[sig]
- : sig),
- &frame->sig);
+ usig = current_thread_info()->exec_domain
+ && current_thread_info()->exec_domain->signal_invmap
+ && sig < 32
+ ? current_thread_info()->exec_domain->signal_invmap[sig]
+ : sig;
+
+ err |= __put_user(usig, &frame->sig);
err |= __put_user(&frame->info, &frame->pinfo);
err |= __put_user(&frame->uc, &frame->puc);
err |= copy_siginfo_to_user(&frame->info, info);
/* Set up registers for signal handler */
regs->esp = (unsigned long) frame;
regs->eip = (unsigned long) ka->sa.sa_handler;
+ regs->eax = (unsigned long) usig;
+ regs->edx = (unsigned long) &frame->info;
+ regs->ecx = (unsigned long) &frame->uc;
set_fs(USER_DS);
regs->xds = __USER_DS;
regs->xes = __USER_DS;
regs->xss = __USER_DS;
regs->xcs = __USER_CS;
+
+ /*
+ * Clear TF when entering the signal handler, but
+ * notify any tracer that was single-stepping it.
+ * The tracer may want to single-step inside the
+ * handler too.
+ */
regs->eflags &= ~TF_MASK;
+ if (test_thread_flag(TIF_SINGLESTEP))
+ ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
return;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
}
/*
*/
static void
-handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
- struct pt_regs * regs)
+handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
+ sigset_t *oldset, struct pt_regs * regs)
{
- struct k_sigaction *ka = ¤t->sighand->action[sig-1];
-
/* Are we from a system call? */
if (regs->orig_eax >= 0) {
/* If so, check system call restarting.. */
else
setup_frame(sig, ka, oldset, regs);
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
if (!(ka->sa.sa_flags & SA_NODEFER)) {
spin_lock_irq(¤t->sighand->siglock);
sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
{
siginfo_t info;
int signr;
+ struct k_sigaction ka;
/*
* We want the common case to go fast, which
if (!oldset)
oldset = ¤t->blocked;
- signr = get_signal_to_deliver(&info, regs, NULL);
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Reenable any watchpoints before delivering the
* signal to user space. The processor register will
* have been cleared if the watchpoint triggered
* inside the kernel.
*/
- __asm__("movl %0,%%db7" : : "r" (current->thread.debugreg[7]));
+ if (unlikely(current->thread.debugreg[7])) {
+ __asm__("movl %0,%%db7" : : "r" (current->thread.debugreg[7]));
+ }
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, oldset, regs);
+ handle_signal(signr, &info, &ka, oldset, regs);
return 1;
}
git://git.onelab.eu / linux-2.6.git / blobdiff