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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 09:58:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 09:58:12 -0700
commit63b12bdb0d21aca527996fb2c547387bfd3e14b8 (patch)
tree6ab83b2a1c289f30fea18b88f04138ee69c37c6f /arch/microblaze/kernel
parentad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff)
parent059ade650ae57cfd371af690fdba887af04aded8 (diff)
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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/microblaze/kernel')
-rw-r--r--arch/microblaze/kernel/signal.c55
1 files changed, 19 insertions, 36 deletions
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 49a07a4d76d0..8955a3829cf0 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -145,22 +145,19 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
* Determine which stack to use..
*/
static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
+get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size)
{
/* Default to using normal stack */
- unsigned long sp = regs->r1;
-
- if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
+ unsigned long sp = sigsp(regs->r1, ksig);
return (void __user *)((sp - frame_size) & -8UL);
}
-static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
+ struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
- int err = 0;
+ int err = 0, sig = ksig->sig;
int signal;
unsigned long address = 0;
#ifdef CONFIG_MMU
@@ -168,10 +165,10 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
pte_t *ptep;
#endif
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
signal = current_thread_info()->exec_domain
&& current_thread_info()->exec_domain->signal_invmap
@@ -179,8 +176,8 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
? current_thread_info()->exec_domain->signal_invmap[sig]
: sig;
- if (info)
- err |= copy_siginfo_to_user(&frame->info, info);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@@ -227,7 +224,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
flush_dcache_range(address, address + 8);
#endif
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up registers for signal handler */
regs->r1 = (unsigned long) frame;
@@ -237,7 +234,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */
regs->r7 = (unsigned long) &frame->uc; /* arg2: ucontext */
/* Offset to handle microblaze rtid r14, 0 */
- regs->pc = (unsigned long)ka->sa.sa_handler;
+ regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
set_fs(USER_DS);
@@ -247,10 +244,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
#endif
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
}
/* Handle restarting system calls */
@@ -283,23 +276,15 @@ do_restart:
*/
static void
-handle_signal(unsigned long 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;
/* Set up the stack frame */
- if (ka->sa.sa_flags & SA_SIGINFO)
- ret = setup_rt_frame(sig, ka, info, oldset, regs);
- else
- ret = setup_rt_frame(sig, ka, NULL, oldset, regs);
+ ret = setup_rt_frame(ksig, oldset, regs);
- if (ret)
- return;
-
- signal_delivered(sig, info, ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -313,21 +298,19 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
*/
static void do_signal(struct pt_regs *regs, int in_syscall)
{
- siginfo_t info;
- int signr;
- struct k_sigaction ka;
+ struct ksignal ksig;
+
#ifdef DEBUG_SIG
pr_info("do signal: %p %d\n", regs, in_syscall);
pr_info("do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
regs->r12, current_thread_info()->flags);
#endif
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
+ if (get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
if (in_syscall)
- handle_restart(regs, &ka, 1);
- handle_signal(signr, &ka, &info, regs);
+ handle_restart(regs, &ksig.ka, 1);
+ handle_signal(&ksig, regs);
return;
}