diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-09 09:58:12 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-09 09:58:12 -0700 |
commit | 63b12bdb0d21aca527996fb2c547387bfd3e14b8 (patch) | |
tree | 6ab83b2a1c289f30fea18b88f04138ee69c37c6f /arch/microblaze/kernel | |
parent | ad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff) | |
parent | 059ade650ae57cfd371af690fdba887af04aded8 (diff) | |
download | linux-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.gz linux-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.bz2 linux-63b12bdb0d21aca527996fb2c547387bfd3e14b8.zip |
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.c | 55 |
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; } |