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Diffstat (limited to 'arch/alpha/kernel/signal.c')
-rw-r--r--arch/alpha/kernel/signal.c121
1 files changed, 45 insertions, 76 deletions
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 02d02c047f17..6cec2881acbf 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -113,16 +113,6 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
}
/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
-{
- sigset_t blocked;
- siginitset(&blocked, mask);
- return sigsuspend(&blocked);
-}
-
-/*
* Do a signal return; undo the signal stack.
*/
@@ -282,12 +272,9 @@ give_sigsegv:
*/
static inline void __user *
-get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
+get_sigframe(struct ksignal *ksig, unsigned long sp, size_t frame_size)
{
- if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
-
- return (void __user *)((sp - frame_size) & -32ul);
+ return (void __user *)((sigsp(sp, ksig) - frame_size) & -32ul);
}
static long
@@ -348,14 +335,13 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
}
static int
-setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
- struct pt_regs *regs)
+setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct sigframe __user *frame;
oldsp = rdusp();
- frame = get_sigframe(ka, oldsp, sizeof(*frame));
+ frame = get_sigframe(ksig, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
return -EFAULT;
@@ -365,9 +351,8 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
- if (ka->ka_restorer) {
- r26 = (unsigned long) ka->ka_restorer;
- } else {
+ r26 = (unsigned long) ksig->ka.ka_restorer;
+ if (!r26) {
err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);
err |= __put_user(INSN_LDI_R0+__NR_sigreturn, frame->retcode+1);
err |= __put_user(INSN_CALLSYS, frame->retcode+2);
@@ -381,8 +366,8 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
/* "Return" to the handler */
regs->r26 = r26;
- regs->r27 = regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->r16 = sig; /* a0: signal number */
+ regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
+ regs->r16 = ksig->sig; /* a0: signal number */
regs->r17 = 0; /* a1: exception code */
regs->r18 = (unsigned long) &frame->sc; /* a2: sigcontext pointer */
wrusp((unsigned long) frame);
@@ -395,18 +380,17 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
}
static int
-setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
+setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct rt_sigframe __user *frame;
oldsp = rdusp();
- frame = get_sigframe(ka, oldsp, sizeof(*frame));
+ frame = get_sigframe(ksig, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
return -EFAULT;
- err |= copy_siginfo_to_user(&frame->info, info);
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@@ -421,9 +405,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
- if (ka->ka_restorer) {
- r26 = (unsigned long) ka->ka_restorer;
- } else {
+ r26 = (unsigned long) ksig->ka.ka_restorer;
+ if (!r26) {
err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);
err |= __put_user(INSN_LDI_R0+__NR_rt_sigreturn,
frame->retcode+1);
@@ -437,8 +420,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* "Return" to the handler */
regs->r26 = r26;
- regs->r27 = regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->r16 = sig; /* a0: signal number */
+ regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
+ regs->r16 = ksig->sig; /* a0: signal number */
regs->r17 = (unsigned long) &frame->info; /* a1: siginfo pointer */
regs->r18 = (unsigned long) &frame->uc; /* a2: ucontext pointer */
wrusp((unsigned long) frame);
@@ -456,22 +439,17 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* OK, we're invoking a handler.
*/
static inline void
-handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
- struct pt_regs * regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
- if (ka->sa.sa_flags & SA_SIGINFO)
- ret = setup_rt_frame(sig, ka, info, oldset, regs);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ ret = setup_rt_frame(ksig, oldset, regs);
else
- ret = setup_frame(sig, ka, oldset, regs);
+ ret = setup_frame(ksig, oldset, regs);
- if (ret) {
- force_sigsegv(sig, current);
- return;
- }
- signal_delivered(sig, info, ka, regs, 0);
+ signal_setup_done(ret, ksig, 0);
}
static inline void
@@ -514,47 +492,38 @@ syscall_restart(unsigned long r0, unsigned long r19,
static void
do_signal(struct pt_regs *regs, unsigned long r0, unsigned long r19)
{
- siginfo_t info;
- int signr;
unsigned long single_stepping = ptrace_cancel_bpt(current);
- struct k_sigaction ka;
+ struct ksignal ksig;
/* This lets the debugger run, ... */
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
- /* ... so re-check the single stepping. */
- single_stepping |= ptrace_cancel_bpt(current);
-
- if (signr > 0) {
+ if (get_signal(&ksig)) {
+ /* ... so re-check the single stepping. */
+ single_stepping |= ptrace_cancel_bpt(current);
/* Whee! Actually deliver the signal. */
if (r0)
- syscall_restart(r0, r19, regs, &ka);
- handle_signal(signr, &ka, &info, regs);
- if (single_stepping)
- ptrace_set_bpt(current); /* re-set bpt */
- return;
- }
-
- if (r0) {
- switch (regs->r0) {
- case ERESTARTNOHAND:
- case ERESTARTSYS:
- case ERESTARTNOINTR:
- /* Reset v0 and a3 and replay syscall. */
- regs->r0 = r0;
- regs->r19 = r19;
- regs->pc -= 4;
- break;
- case ERESTART_RESTARTBLOCK:
- /* Force v0 to the restart syscall and reply. */
- regs->r0 = __NR_restart_syscall;
- regs->pc -= 4;
- break;
+ syscall_restart(r0, r19, regs, &ksig.ka);
+ handle_signal(&ksig, regs);
+ } else {
+ single_stepping |= ptrace_cancel_bpt(current);
+ if (r0) {
+ switch (regs->r0) {
+ case ERESTARTNOHAND:
+ case ERESTARTSYS:
+ case ERESTARTNOINTR:
+ /* Reset v0 and a3 and replay syscall. */
+ regs->r0 = r0;
+ regs->r19 = r19;
+ regs->pc -= 4;
+ break;
+ case ERESTART_RESTARTBLOCK:
+ /* Set v0 to the restart_syscall and replay */
+ regs->r0 = __NR_restart_syscall;
+ regs->pc -= 4;
+ break;
+ }
}
+ restore_saved_sigmask();
}
-
- /* If there's no signal to deliver, we just restore the saved mask. */
- restore_saved_sigmask();
if (single_stepping)
ptrace_set_bpt(current); /* re-set breakpoint */
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 04:40:48 +0000