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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 20:58:12 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 20:58:12 +0400
commit63b12bdb0d21aca527996fb2c547387bfd3e14b8 (patch)
tree6ab83b2a1c289f30fea18b88f04138ee69c37c6f /arch/blackfin
parentad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff)
parent059ade650ae57cfd371af690fdba887af04aded8 (diff)
downloadlinux-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.xz
Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc
Pull arch signal handling cleanup from Richard Weinberger: "This patch series moves all remaining archs to the get_signal(), signal_setup_done() and sigsp() functions. Currently these archs use open coded variants of the said functions. Further, unused parameters get removed from get_signal_to_deliver(), tracehook_signal_handler() and signal_delivered(). At the end of the day we save around 500 lines of code." * 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits) powerpc: Use sigsp() openrisc: Use sigsp() mn10300: Use sigsp() mips: Use sigsp() microblaze: Use sigsp() metag: Use sigsp() m68k: Use sigsp() m32r: Use sigsp() hexagon: Use sigsp() frv: Use sigsp() cris: Use sigsp() c6x: Use sigsp() blackfin: Use sigsp() avr32: Use sigsp() arm64: Use sigsp() arc: Use sigsp() sas_ss_flags: Remove nested ternary if Rip out get_signal_to_deliver() Clean up signal_delivered() tracehook_signal_handler: Remove sig, info, ka and regs ...
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/signal.c51
1 files changed, 19 insertions, 32 deletions
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index b022af6c48f8..ef275571d885 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -135,40 +135,31 @@ static inline int rt_setup_sigcontext(struct sigcontext *sc, struct pt_regs *reg
return err;
}
-static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+static inline void *get_sigframe(struct ksignal *ksig,
size_t frame_size)
{
- unsigned long usp;
+ unsigned long usp = sigsp(rdusp(), ksig);
- /* Default to using normal stack. */
- usp = rdusp();
-
- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (!on_sig_stack(usp))
- usp = current->sas_ss_sp + current->sas_ss_size;
- }
return (void *)((usp - frame_size) & -8UL);
}
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)
{
struct rt_sigframe *frame;
int err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ksig, sizeof(*frame));
err |= __put_user((current_thread_info()->exec_domain
&& current_thread_info()->exec_domain->signal_invmap
- && sig < 32
+ && ksig->sig < 32
? current_thread_info()->exec_domain->
- signal_invmap[sig] : sig), &frame->sig);
+ signal_invmap[ksig->sig] : ksig->sig), &frame->sig);
err |= __put_user(&frame->info, &frame->pinfo);
err |= __put_user(&frame->uc, &frame->puc);
- 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);
@@ -183,7 +174,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
/* Set up registers for signal handler */
if (current->personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
- (struct fdpic_func_descriptor *) ka->sa.sa_handler;
+ (struct fdpic_func_descriptor *) ksig->ka.sa.sa_handler;
u32 pc, p3;
err |= __get_user(pc, &funcptr->text);
err |= __get_user(p3, &funcptr->GOT);
@@ -192,7 +183,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
regs->pc = pc;
regs->p3 = p3;
} else
- regs->pc = (unsigned long)ka->sa.sa_handler;
+ regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
wrusp((unsigned long)frame);
regs->rets = SIGRETURN_STUB;
@@ -237,20 +228,19 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
* OK, we're invoking a handler
*/
static void
-handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
- struct pt_regs *regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
+ int ret;
+
/* are we from a system call? to see pt_regs->orig_p0 */
if (regs->orig_p0 >= 0)
/* If so, check system call restarting.. */
- handle_restart(regs, ka, 1);
+ handle_restart(regs, &ksig->ka, 1);
/* set up the stack frame */
- if (setup_rt_frame(sig, ka, info, sigmask_to_save(), regs) < 0)
- force_sigsegv(sig, current);
- else
- signal_delivered(sig, info, ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
+ ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
+
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -264,16 +254,13 @@ handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
*/
asmlinkage void do_signal(struct pt_regs *regs)
{
- siginfo_t info;
- int signr;
- struct k_sigaction ka;
+ struct ksignal ksig;
current->thread.esp0 = (unsigned long)regs;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
+ if (get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, &ka, regs);
+ handle_signal(&ksig, regs);
return;
}