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Diffstat (limited to 'arch/parisc/kernel/signal.c')
-rw-r--r--arch/parisc/kernel/signal.c401
1 files changed, 164 insertions, 237 deletions
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 3a25a7bd673..1cba8f29bb4 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -16,17 +16,16 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
+#include <linux/tracehook.h>
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/compat.h>
#include <linux/elf.h>
-#include <linux/personality.h>
#include <asm/ucontext.h>
#include <asm/rt_sigframe.h>
#include <asm/uaccess.h>
@@ -35,7 +34,6 @@
#include <asm/asm-offsets.h>
#ifdef CONFIG_COMPAT
-#include <linux/compat.h>
#include "signal32.h"
#endif
@@ -50,9 +48,6 @@
#define DBG(LEVEL, ...)
#endif
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
/* gcc will complain if a pointer is cast to an integer of different
* size. If you really need to do this (and we do for an ELF32 user
* application in an ELF64 kernel) then you have to do a cast to an
@@ -60,58 +55,6 @@
* this. */
#define A(__x) ((unsigned long)(__x))
-int do_signal(sigset_t *oldset, struct pt_regs *regs, int in_syscall);
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-#ifdef __LP64__
-#include "sys32.h"
-#endif
-
-asmlinkage int
-sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, struct pt_regs *regs)
-{
- sigset_t saveset, newset;
-#ifdef __LP64__
- compat_sigset_t newset32;
-
- if(personality(current->personality) == PER_LINUX32){
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(compat_sigset_t))
- return -EINVAL;
- if (copy_from_user(&newset32, (compat_sigset_t __user *)unewset, sizeof(newset32)))
- return -EFAULT;
- sigset_32to64(&newset,&newset32);
-
- } else
-#endif
- {
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
- }
-
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->gr[28] = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs, 1))
- return -EINTR;
- }
-}
-
/*
* Do a signal return - restore sigcontext.
*/
@@ -135,7 +78,7 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
err |= __copy_from_user(regs->iaoq, sc->sc_iaoq, sizeof(regs->iaoq));
err |= __copy_from_user(regs->iasq, sc->sc_iasq, sizeof(regs->iasq));
err |= __get_user(regs->sar, &sc->sc_sar);
- DBG(2,"restore_sigcontext: iaoq is 0x%#lx / 0x%#lx\n",
+ DBG(2,"restore_sigcontext: iaoq is %#lx / %#lx\n",
regs->iaoq[0],regs->iaoq[1]);
DBG(2,"restore_sigcontext: r28 is %ld\n", regs->gr[28]);
return err;
@@ -145,28 +88,30 @@ void
sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
{
struct rt_sigframe __user *frame;
- struct siginfo si;
sigset_t set;
unsigned long usp = (regs->gr[30] & ~(0x01UL));
unsigned long sigframe_size = PARISC_RT_SIGFRAME_SIZE;
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
compat_sigset_t compat_set;
struct compat_rt_sigframe __user * compat_frame;
- if(personality(current->personality) == PER_LINUX32)
+ if (is_compat_task())
sigframe_size = PARISC_RT_SIGFRAME_SIZE32;
#endif
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
/* Unwind the user stack to get the rt_sigframe structure. */
frame = (struct rt_sigframe __user *)
(usp - sigframe_size);
DBG(2,"sys_rt_sigreturn: frame is %p\n", frame);
-#ifdef __LP64__
+ regs->orig_r28 = 1; /* no restarts for sigreturn */
+
+#ifdef CONFIG_64BIT
compat_frame = (struct compat_rt_sigframe __user *)frame;
- if(personality(current->personality) == PER_LINUX32){
+ if (is_compat_task()) {
DBG(2,"sys_rt_sigreturn: ELF32 process.\n");
if (__copy_from_user(&compat_set, &compat_frame->uc.uc_sigmask, sizeof(compat_set)))
goto give_sigsegv;
@@ -178,15 +123,11 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
goto give_sigsegv;
}
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
/* Good thing we saved the old gr[30], eh? */
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX32){
+#ifdef CONFIG_64BIT
+ if (is_compat_task()) {
DBG(1,"sys_rt_sigreturn: compat_frame->uc.uc_mcontext 0x%p\n",
&compat_frame->uc.uc_mcontext);
// FIXME: Load upper half from register file
@@ -195,7 +136,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &compat_frame->uc.uc_stack);
- if (do_sigaltstack32(&compat_frame->uc.uc_stack, NULL, usp) == -EFAULT)
+ if (compat_restore_altstack(&compat_frame->uc.uc_stack))
goto give_sigsegv;
} else
#endif
@@ -206,7 +147,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &frame->uc.uc_stack);
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto give_sigsegv;
}
@@ -225,13 +166,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
give_sigsegv:
DBG(1,"sys_rt_sigreturn: Sending SIGSEGV\n");
- si.si_signo = SIGSEGV;
- si.si_errno = 0;
- si.si_code = SI_KERNEL;
- si.si_pid = current->pid;
- si.si_uid = current->uid;
- si.si_addr = &frame->uc;
- force_sig_info(SIGSEGV, &si, current);
+ force_sig(SIGSEGV, current);
return;
}
@@ -248,8 +183,10 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
DBG(1,"get_sigframe: ka = %#lx, sp = %#lx, frame_size = %#lx\n",
(unsigned long)ka, sp, frame_size);
- if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp))
- sp = current->sas_ss_sp; /* Stacks grow up! */
+ /* Align alternate stack and reserve 64 bytes for the signal
+ handler's frame marker. */
+ if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
+ sp = (current->sas_ss_sp + 0x7f) & ~0x3f; /* Stacks grow up! */
DBG(1,"get_sigframe: Returning sp = %#lx\n", (unsigned long)sp);
return (void __user *) sp; /* Stacks grow up. Fun. */
@@ -297,8 +234,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
unsigned long rp, usp;
unsigned long haddr, sigframe_size;
int err = 0;
-#ifdef __LP64__
- compat_int_t compat_val;
+#ifdef CONFIG_64BIT
struct compat_rt_sigframe __user * compat_frame;
compat_sigset_t compat_set;
#endif
@@ -311,22 +247,14 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
DBG(1,"setup_rt_frame: frame %p info %p\n", frame, info);
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
compat_frame = (struct compat_rt_sigframe __user *)frame;
- if(personality(current->personality) == PER_LINUX32) {
+ if (is_compat_task()) {
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
- err |= compat_copy_siginfo_to_user(&compat_frame->info, info);
- DBG(1,"SETUP_RT_FRAME: 1\n");
- compat_val = (compat_int_t)current->sas_ss_sp;
- err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_sp);
- DBG(1,"SETUP_RT_FRAME: 2\n");
- compat_val = (compat_int_t)current->sas_ss_size;
- err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_size);
- DBG(1,"SETUP_RT_FRAME: 3\n");
- compat_val = sas_ss_flags(regs->gr[30]);
- err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_flags);
+ err |= copy_siginfo_to_user32(&compat_frame->info, info);
+ err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext,
@@ -338,14 +266,11 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
{
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
err |= copy_siginfo_to_user(&frame->info, info);
- err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= __put_user(sas_ss_flags(regs->gr[30]),
- &frame->uc.uc_stack.ss_flags);
+ err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall);
- /* FIXME: Should probably be converted aswell for the compat case */
+ /* FIXME: Should probably be converted as well for the compat case */
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
}
@@ -368,7 +293,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
#if DEBUG_SIG
/* Assert that we're flushing in the correct space... */
{
- int sid;
+ unsigned long sid;
asm ("mfsp %%sr3,%0" : "=r" (sid));
DBG(1,"setup_rt_frame: Flushing 64 bytes at space %#x offset %p\n",
sid, frame->tramp);
@@ -380,7 +305,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
flush_user_icache_range((unsigned long) &frame->tramp[0],
(unsigned long) &frame->tramp[TRAMP_SIZE]);
- /* TRAMP Words 0-4, Lenght 5 = SIGRESTARTBLOCK_TRAMP
+ /* TRAMP Words 0-4, Length 5 = SIGRESTARTBLOCK_TRAMP
* TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP
* So the SIGRETURN_TRAMP is at the end of SIGRESTARTBLOCK_TRAMP
*/
@@ -391,8 +316,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
haddr = A(ka->sa.sa_handler);
/* The sa_handler may be a pointer to a function descriptor */
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX32) {
+#ifdef CONFIG_64BIT
+ if (is_compat_task()) {
#endif
if (haddr & PA_PLABEL_FDESC) {
Elf32_Fdesc fdesc;
@@ -406,7 +331,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
haddr = fdesc.addr;
regs->gr[19] = fdesc.gp;
}
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
} else {
Elf64_Fdesc fdesc;
Elf64_Fdesc __user *ufdesc = (Elf64_Fdesc __user *)A(haddr & ~3);
@@ -426,20 +351,20 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* The syscall return path will create IAOQ values from r31.
*/
sigframe_size = PARISC_RT_SIGFRAME_SIZE;
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX32)
+#ifdef CONFIG_64BIT
+ if (is_compat_task())
sigframe_size = PARISC_RT_SIGFRAME_SIZE32;
#endif
if (in_syscall) {
regs->gr[31] = haddr;
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX)
+#ifdef CONFIG_64BIT
+ if (!test_thread_flag(TIF_32BIT))
sigframe_size |= 1;
#endif
} else {
unsigned long psw = USER_PSW;
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX)
+#ifdef CONFIG_64BIT
+ if (!test_thread_flag(TIF_32BIT))
psw |= PSW_W;
#endif
@@ -463,8 +388,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->gr[2] = rp; /* userland return pointer */
regs->gr[26] = sig; /* signal number */
-#ifdef __LP64__
- if(personality(current->personality) == PER_LINUX32){
+#ifdef CONFIG_64BIT
+ if (is_compat_task()) {
regs->gr[25] = A(&compat_frame->info); /* siginfo pointer */
regs->gr[24] = A(&compat_frame->uc); /* ucontext pointer */
} else
@@ -497,24 +422,112 @@ give_sigsegv:
* OK, we're invoking a handler.
*/
-static long
+static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs *regs, int in_syscall)
+ struct pt_regs *regs, int in_syscall)
{
+ sigset_t *oldset = sigmask_to_save();
DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n",
sig, ka, info, oldset, regs);
/* Set up the stack frame */
if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
- return 0;
-
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- return 1;
+ return;
+
+ signal_delivered(sig, info, ka, regs,
+ test_thread_flag(TIF_SINGLESTEP) ||
+ test_thread_flag(TIF_BLOCKSTEP));
+
+ DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
+ regs->gr[28]);
+}
+
+static inline void
+syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
+{
+ if (regs->orig_r28)
+ return;
+ regs->orig_r28 = 1; /* no more restarts */
+ /* Check the return code */
+ switch (regs->gr[28]) {
+ case -ERESTART_RESTARTBLOCK:
+ case -ERESTARTNOHAND:
+ DBG(1,"ERESTARTNOHAND: returning -EINTR\n");
+ regs->gr[28] = -EINTR;
+ break;
+
+ case -ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ DBG(1,"ERESTARTSYS: putting -EINTR\n");
+ regs->gr[28] = -EINTR;
+ break;
+ }
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+ /* A syscall is just a branch, so all
+ * we have to do is fiddle the return pointer.
+ */
+ regs->gr[31] -= 8; /* delayed branching */
+ break;
+ }
+}
+
+static inline void
+insert_restart_trampoline(struct pt_regs *regs)
+{
+ if (regs->orig_r28)
+ return;
+ regs->orig_r28 = 1; /* no more restarts */
+ switch(regs->gr[28]) {
+ case -ERESTART_RESTARTBLOCK: {
+ /* Restart the system call - no handlers present */
+ unsigned int *usp = (unsigned int *)regs->gr[30];
+
+ /* Setup a trampoline to restart the syscall
+ * with __NR_restart_syscall
+ *
+ * 0: <return address (orig r31)>
+ * 4: <2nd half for 64-bit>
+ * 8: ldw 0(%sp), %r31
+ * 12: be 0x100(%sr2, %r0)
+ * 16: ldi __NR_restart_syscall, %r20
+ */
+#ifdef CONFIG_64BIT
+ put_user(regs->gr[31] >> 32, &usp[0]);
+ put_user(regs->gr[31] & 0xffffffff, &usp[1]);
+ put_user(0x0fc010df, &usp[2]);
+#else
+ put_user(regs->gr[31], &usp[0]);
+ put_user(0x0fc0109f, &usp[2]);
+#endif
+ put_user(0xe0008200, &usp[3]);
+ put_user(0x34140000, &usp[4]);
+
+ /* Stack is 64-byte aligned, and we only need
+ * to flush 1 cache line.
+ * Flushing one cacheline is cheap.
+ * "sync" on bigger (> 4 way) boxes is not.
+ */
+ flush_user_dcache_range(regs->gr[30], regs->gr[30] + 4);
+ flush_user_icache_range(regs->gr[30], regs->gr[30] + 4);
+
+ regs->gr[31] = regs->gr[30] + 8;
+ return;
+ }
+ case -ERESTARTNOHAND:
+ case -ERESTARTSYS:
+ case -ERESTARTNOINTR: {
+ /* Hooray for delayed branching. We don't
+ * have to restore %r20 (the system call
+ * number) because it gets loaded in the delay
+ * slot of the branch external instruction.
+ */
+ regs->gr[31] -= 8;
+ return;
+ }
+ default:
+ break;
+ }
}
/*
@@ -528,131 +541,45 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
* registers). As noted below, the syscall number gets restored for
* us due to the magic of delayed branching.
*/
-
-asmlinkage int
-do_signal(sigset_t *oldset, struct pt_regs *regs, int in_syscall)
+asmlinkage void
+do_signal(struct pt_regs *regs, long in_syscall)
{
siginfo_t info;
struct k_sigaction ka;
int signr;
- DBG(1,"\ndo_signal: oldset=0x%p, regs=0x%p, sr7 %#lx, in_syscall=%d\n",
- oldset, regs, regs->sr[7], in_syscall);
-
- /* Everyone else checks to see if they are in kernel mode at
- this point and exits if that's the case. I'm not sure why
- we would be called in that case, but for some reason we
- are. */
-
- if (!oldset)
- oldset = &current->blocked;
-
- DBG(1,"do_signal: oldset %08lx / %08lx\n",
- oldset->sig[0], oldset->sig[1]);
-
+ DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
+ regs, regs->sr[7], in_syscall);
- /* May need to force signal if handle_signal failed to deliver */
- while (1) {
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
- if (signr <= 0)
- break;
-
+ if (signr > 0) {
/* Restart a system call if necessary. */
- if (in_syscall) {
- /* Check the return code */
- switch (regs->gr[28]) {
- case -ERESTART_RESTARTBLOCK:
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
- case -ERESTARTNOHAND:
- DBG(1,"ERESTARTNOHAND: returning -EINTR\n");
- regs->gr[28] = -EINTR;
- break;
-
- case -ERESTARTSYS:
- if (!(ka.sa.sa_flags & SA_RESTART)) {
- DBG(1,"ERESTARTSYS: putting -EINTR\n");
- regs->gr[28] = -EINTR;
- break;
- }
- /* fallthrough */
- case -ERESTARTNOINTR:
- /* A syscall is just a branch, so all
- we have to do is fiddle the return pointer. */
- regs->gr[31] -= 8; /* delayed branching */
- /* Preserve original r28. */
- regs->gr[28] = regs->orig_r28;
- break;
- }
- }
- /* Whee! Actually deliver the signal. If the
- delivery failed, we need to continue to iterate in
- this loop so we can deliver the SIGSEGV... */
- if (handle_signal(signr, &info, &ka, oldset, regs, in_syscall)) {
- DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
- regs->gr[28]);
- return 1;
- }
+ if (in_syscall)
+ syscall_restart(regs, &ka);
+
+ handle_signal(signr, &info, &ka, regs, in_syscall);
+ return;
}
- /* end of while(1) looping forever if we can't force a signal */
/* Did we come from a system call? */
- if (in_syscall) {
- /* Restart the system call - no handlers present */
- if (regs->gr[28] == -ERESTART_RESTARTBLOCK) {
- unsigned int *usp = (unsigned int *)regs->gr[30];
-
- /* Setup a trampoline to restart the syscall
- * with __NR_restart_syscall
- *
- * 0: <return address (orig r31)>
- * 4: <2nd half for 64-bit>
- * 8: ldw 0(%sp), %r31
- * 12: be 0x100(%sr2, %r0)
- * 16: ldi __NR_restart_syscall, %r20
- */
-#ifndef __LP64__
- put_user(regs->gr[31], &usp[0]);
- put_user(0x0fc0109f, &usp[2]);
-#else
- put_user(regs->gr[31] >> 32, &usp[0]);
- put_user(regs->gr[31] & 0xffffffff, &usp[1]);
- put_user(0x0fc010df, &usp[2]);
-#endif
- put_user(0xe0008200, &usp[3]);
- put_user(0x34140000, &usp[4]);
-
- /* Stack is 64-byte aligned, and we only need
- * to flush 1 cache line.
- * Flushing one cacheline is cheap.
- * "sync" on bigger (> 4 way) boxes is not.
- */
- asm("fdc %%r0(%%sr3, %0)\n"
- "sync\n"
- "fic %%r0(%%sr3, %0)\n"
- "sync\n"
- : : "r"(regs->gr[30]));
-
- regs->gr[31] = regs->gr[30] + 8;
- /* Preserve original r28. */
- regs->gr[28] = regs->orig_r28;
- } else if (regs->gr[28] == -ERESTARTNOHAND ||
- regs->gr[28] == -ERESTARTSYS ||
- regs->gr[28] == -ERESTARTNOINTR) {
- /* Hooray for delayed branching. We don't
- have to restore %r20 (the system call
- number) because it gets loaded in the delay
- slot of the branch external instruction. */
- regs->gr[31] -= 8;
- /* Preserve original r28. */
- regs->gr[28] = regs->orig_r28;
- }
- }
+ if (in_syscall)
+ insert_restart_trampoline(regs);
DBG(1,"do_signal: Exit (not delivered), regs->gr[28] = %ld\n",
regs->gr[28]);
- return 0;
+ restore_saved_sigmask();
+}
+
+void do_notify_resume(struct pt_regs *regs, long in_syscall)
+{
+ if (test_thread_flag(TIF_SIGPENDING))
+ do_signal(regs, in_syscall);
+
+ if (test_thread_flag(TIF_NOTIFY_RESUME)) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ }
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:27:46 +0000