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authorMichal Simek <monstr@monstr.eu>2009-05-12 12:10:52 +0200
committerMichal Simek <monstr@monstr.eu>2009-05-21 15:56:07 +0200
commita6029d1c8cfc9ac2609195f31c2e70b584d3496e (patch)
tree739930b605c3aae68fe669054cb01dfad1025ffa /arch/microblaze/kernel/signal.c
parent732703af9c3478c3f935dd5ae80140b9b12bda09 (diff)
microblaze: prepare signal handling for generic unistd.h
We need to define set_restore_sigmask() in order to get pselect and ppoll. Also, the setup_frame function can not be used when __NR_sigreturn is not defined. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel/signal.c')
-rw-r--r--arch/microblaze/kernel/signal.c79
1 files changed, 3 insertions, 76 deletions
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 804a074a94a8..3cdcbfe41295 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -288,80 +288,6 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
return (void __user *)((sp - frame_size) & -8UL);
}
-static void setup_frame(int sig, struct k_sigaction *ka,
- sigset_t *set, struct pt_regs *regs)
-{
- struct sigframe *frame;
- int err = 0;
- int signal;
-
- frame = get_sigframe(ka, regs, sizeof(*frame));
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
-
- signal = current_thread_info()->exec_domain
- && current_thread_info()->exec_domain->signal_invmap
- && sig < 32
- ? current_thread_info()->exec_domain->signal_invmap[sig]
- : sig;
-
- err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
-
- if (_NSIG_WORDS > 1) {
- err |= __copy_to_user(frame->extramask, &set->sig[1],
- sizeof(frame->extramask));
- }
-
- /* Set up to return from userspace. If provided, use a stub
- already in userspace. */
- /* minus 8 is offset to cater for "rtsd r15,8" offset */
- if (ka->sa.sa_flags & SA_RESTORER) {
- regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8;
- } else {
- /* Note, these encodings are _big endian_! */
-
- /* addi r12, r0, __NR_sigreturn */
- err |= __put_user(0x31800000 | __NR_sigreturn ,
- frame->tramp + 0);
- /* brki r14, 0x8 */
- err |= __put_user(0xb9cc0008, frame->tramp + 1);
-
- /* Return from sighandler will jump to the tramp.
- Negative 8 offset because return is rtsd r15, 8 */
- regs->r15 = ((unsigned long)frame->tramp)-8;
-
- __invalidate_cache_sigtramp((unsigned long)frame->tramp);
- }
-
- if (err)
- goto give_sigsegv;
-
- /* Set up registers for signal handler */
- regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
-
- /* Signal handler args: */
- regs->r5 = signal; /* Arg 0: signum */
- regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */
-
- /* Offset of 4 to handle microblaze rtid r14, 0 */
- regs->pc = (unsigned long)ka->sa.sa_handler;
-
- set_fs(USER_DS);
-
-#ifdef DEBUG_SIG
- printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
- current->comm, current->pid, frame, regs->pc);
-#endif
-
- return;
-
-give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
-}
-
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
@@ -380,7 +306,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
? current_thread_info()->exec_domain->signal_invmap[sig]
: sig;
- err |= copy_siginfo_to_user(&frame->info, info);
+ if (info)
+ err |= copy_siginfo_to_user(&frame->info, info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@@ -478,7 +405,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
if (ka->sa.sa_flags & SA_SIGINFO)
setup_rt_frame(sig, ka, info, oldset, regs);
else
- setup_frame(sig, ka, oldset, regs);
+ setup_rt_frame(sig, ka, NULL, oldset, regs);
if (ka->sa.sa_flags & SA_ONESHOT)
ka->sa.sa_handler = SIG_DFL;