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Diffstat (limited to 'arch/sparc/kernel/signal_64.c')
-rw-r--r--arch/sparc/kernel/signal_64.c118
1 files changed, 43 insertions, 75 deletions
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 165a897a4133..35923e8abd82 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -308,7 +308,7 @@ static int invalid_frame_pointer(void __user *fp)
return 0;
}
-static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
+static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
@@ -320,12 +320,7 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *
return (void __user *) -1L;
/* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(sp) == 0)
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
-
- sp -= framesize;
+ sp = sigsp(sp, ksig) - framesize;
/* Always align the stack frame. This handles two cases. First,
* sigaltstack need not be mindful of platform specific stack
@@ -339,8 +334,7 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *
}
static inline int
-setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
- int signo, sigset_t *oldset, siginfo_t *info)
+setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
int wsaved, err, sf_size;
@@ -358,10 +352,12 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
if (wsaved)
sf_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *)
- get_sigframe(ka, regs, sf_size);
+ get_sigframe(ksig, regs, sf_size);
- if (invalid_frame_pointer (sf))
- goto sigill;
+ if (invalid_frame_pointer (sf)) {
+ do_exit(SIGILL); /* won't return, actually */
+ return -EINVAL;
+ }
tail = (sf + 1);
@@ -389,7 +385,7 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
/* Setup sigaltstack */
err |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
- err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
+ err |= copy_to_user(&sf->mask, sigmask_to_save(), sizeof(sigset_t));
if (!wsaved) {
err |= copy_in_user((u64 __user *)sf,
@@ -402,18 +398,18 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= copy_to_user(sf, rp, sizeof(struct reg_window));
}
- if (info)
- err |= copy_siginfo_to_user(&sf->info, info);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err |= copy_siginfo_to_user(&sf->info, &ksig->info);
else {
- err |= __put_user(signo, &sf->info.si_signo);
+ err |= __put_user(ksig->sig, &sf->info.si_signo);
err |= __put_user(SI_NOINFO, &sf->info.si_code);
}
if (err)
- goto sigsegv;
+ return err;
/* 3. signal handler back-trampoline and parameters */
regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
- regs->u_regs[UREG_I0] = signo;
+ regs->u_regs[UREG_I0] = ksig->sig;
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
/* The sigcontext is passed in this way because of how it
@@ -423,37 +419,15 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
/* 5. signal handler */
- regs->tpc = (unsigned long) ka->sa.sa_handler;
+ regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
regs->tnpc &= 0xffffffff;
}
/* 4. return to kernel instructions */
- regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
return 0;
-
-sigill:
- do_exit(SIGILL);
- return -EINVAL;
-
-sigsegv:
- force_sigsegv(signo, current);
- return -EFAULT;
-}
-
-static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
- siginfo_t *info,
- sigset_t *oldset, struct pt_regs *regs)
-{
- int err;
-
- err = setup_rt_frame(ka, regs, signr, oldset,
- (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
- if (err)
- return;
-
- signal_delivered(signr, info, ka, regs, 0);
}
static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
@@ -483,11 +457,9 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
*/
static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
{
- struct k_sigaction ka;
+ struct ksignal ksig;
int restart_syscall;
- sigset_t *oldset = sigmask_to_save();
- siginfo_t info;
- int signr;
+ bool has_handler;
/* It's a lot of work and synchronization to add a new ptrace
* register for GDB to save and restore in order to get
@@ -513,13 +485,13 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
#ifdef CONFIG_COMPAT
if (test_thread_flag(TIF_32BIT)) {
- extern void do_signal32(sigset_t *, struct pt_regs *);
- do_signal32(oldset, regs);
+ extern void do_signal32(struct pt_regs *);
+ do_signal32(regs);
return;
}
#endif
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ has_handler = get_signal(&ksig);
restart_syscall = 0;
if (pt_regs_is_syscall(regs) &&
@@ -528,34 +500,30 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
orig_i0 = regs->u_regs[UREG_G6];
}
- if (signr > 0) {
+ if (has_handler) {
if (restart_syscall)
- syscall_restart(orig_i0, regs, &ka.sa);
- handle_signal(signr, &ka, &info, oldset, regs);
- return;
- }
- if (restart_syscall &&
- (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
- regs->u_regs[UREG_I0] == ERESTARTSYS ||
- regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
- /* replay the system call when we are done */
- regs->u_regs[UREG_I0] = orig_i0;
- regs->tpc -= 4;
- regs->tnpc -= 4;
- pt_regs_clear_syscall(regs);
- }
- if (restart_syscall &&
- regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
- regs->u_regs[UREG_G1] = __NR_restart_syscall;
- regs->tpc -= 4;
- regs->tnpc -= 4;
- pt_regs_clear_syscall(regs);
+ syscall_restart(orig_i0, regs, &ksig.ka.sa);
+ signal_setup_done(setup_rt_frame(&ksig, regs), &ksig, 0);
+ } else {
+ if (restart_syscall) {
+ switch (regs->u_regs[UREG_I0]) {
+ case ERESTARTNOHAND:
+ case ERESTARTSYS:
+ case ERESTARTNOINTR:
+ /* replay the system call when we are done */
+ regs->u_regs[UREG_I0] = orig_i0;
+ regs->tpc -= 4;
+ regs->tnpc -= 4;
+ pt_regs_clear_syscall(regs);
+ case ERESTART_RESTARTBLOCK:
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->tpc -= 4;
+ regs->tnpc -= 4;
+ pt_regs_clear_syscall(regs);
+ }
+ }
+ restore_saved_sigmask();
}
-
- /* If there's no signal to deliver, we just put the saved sigmask
- * back
- */
- restore_saved_sigmask();
}
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 21:30:11 +0300