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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-09 09:58:12 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-09 09:58:12 -0700 |
commit | 63b12bdb0d21aca527996fb2c547387bfd3e14b8 (patch) | |
tree | 6ab83b2a1c289f30fea18b88f04138ee69c37c6f /arch/tile | |
parent | ad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff) | |
parent | 059ade650ae57cfd371af690fdba887af04aded8 (diff) | |
download | linux-stable-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.gz linux-stable-63b12bdb0d21aca527996fb2c547387bfd3e14b8.tar.bz2 linux-stable-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/tile')
-rw-r--r-- | arch/tile/include/asm/compat.h | 3 | ||||
-rw-r--r-- | arch/tile/kernel/compat_signal.c | 29 | ||||
-rw-r--r-- | arch/tile/kernel/signal.c | 54 |
3 files changed, 40 insertions, 46 deletions
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h index ffd4493efc78..c14e36f008c8 100644 --- a/arch/tile/include/asm/compat.h +++ b/arch/tile/include/asm/compat.h @@ -267,8 +267,7 @@ static inline int is_compat_task(void) return current_thread_info()->status & TS_COMPAT; } -extern int compat_setup_rt_frame(int sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *set, +extern int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs); /* Compat syscalls. */ diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index 19c04b5ce408..8c5abf2e4794 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -190,18 +190,18 @@ static inline void __user *compat_get_sigframe(struct k_sigaction *ka, return (void __user *) sp; } -int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { unsigned long restorer; struct compat_rt_sigframe __user *frame; - int err = 0; + int err = 0, sig = ksig->sig; int usig; - frame = compat_get_sigframe(ka, regs, sizeof(*frame)); + frame = compat_get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; + goto err; usig = current_thread_info()->exec_domain && current_thread_info()->exec_domain->signal_invmap @@ -210,12 +210,12 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, : sig; /* Always write at least the signal number for the stack backtracer. */ - if (ka->sa.sa_flags & SA_SIGINFO) { + if (ksig->ka.sa.sa_flags & SA_SIGINFO) { /* At sigreturn time, restore the callee-save registers too. */ - err |= copy_siginfo_to_user32(&frame->info, info); + err |= copy_siginfo_to_user32(&frame->info, &ksig->info); regs->flags |= PT_FLAGS_RESTORE_REGS; } else { - err |= __put_user(info->si_signo, &frame->info.si_signo); + err |= __put_user(ksig->info.si_signo, &frame->info.si_signo); } /* Create the ucontext. */ @@ -226,11 +226,11 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= setup_sigcontext(&frame->uc.uc_mcontext, regs); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + goto err; restorer = VDSO_SYM(&__vdso_rt_sigreturn); - if (ka->sa.sa_flags & SA_RESTORER) - restorer = ptr_to_compat_reg(ka->sa.sa_restorer); + if (ksig->ka.sa.sa_flags & SA_RESTORER) + restorer = ptr_to_compat_reg(ksig->ka.sa.sa_restorer); /* * Set up registers for signal handler. @@ -239,7 +239,7 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, * We always pass siginfo and mcontext, regardless of SA_SIGINFO, * since some things rely on this (e.g. glibc's debug/segfault.c). */ - regs->pc = ptr_to_compat_reg(ka->sa.sa_handler); + regs->pc = ptr_to_compat_reg(ksig->ka.sa.sa_handler); regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */ regs->sp = ptr_to_compat_reg(frame); regs->lr = restorer; @@ -249,7 +249,8 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->flags |= PT_FLAGS_CALLER_SAVES; return 0; -give_sigsegv: - signal_fault("bad setup frame", regs, frame, sig); +err: + trace_unhandled_signal("bad sigreturn frame", regs, + (unsigned long)frame, SIGSEGV); return -EFAULT; } diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index d1d026f01267..7c2fecc52177 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -153,18 +153,18 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, return (void __user *) sp; } -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) { unsigned long restorer; struct rt_sigframe __user *frame; - int err = 0; + int err = 0, sig = ksig->sig; int usig; - frame = get_sigframe(ka, regs, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; + goto err; usig = current_thread_info()->exec_domain && current_thread_info()->exec_domain->signal_invmap @@ -173,12 +173,12 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, : sig; /* Always write at least the signal number for the stack backtracer. */ - if (ka->sa.sa_flags & SA_SIGINFO) { + if (ksig->ka.sa.sa_flags & SA_SIGINFO) { /* At sigreturn time, restore the callee-save registers too. */ - err |= copy_siginfo_to_user(&frame->info, info); + err |= copy_siginfo_to_user(&frame->info, &ksig->info); regs->flags |= PT_FLAGS_RESTORE_REGS; } else { - err |= __put_user(info->si_signo, &frame->info.si_signo); + err |= __put_user(ksig->info.si_signo, &frame->info.si_signo); } /* Create the ucontext. */ @@ -189,11 +189,11 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= setup_sigcontext(&frame->uc.uc_mcontext, regs); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + goto err; restorer = VDSO_SYM(&__vdso_rt_sigreturn); - if (ka->sa.sa_flags & SA_RESTORER) - restorer = (unsigned long) ka->sa.sa_restorer; + if (ksig->ka.sa.sa_flags & SA_RESTORER) + restorer = (unsigned long) ksig->ka.sa.sa_restorer; /* * Set up registers for signal handler. @@ -202,7 +202,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, * We always pass siginfo and mcontext, regardless of SA_SIGINFO, * since some things rely on this (e.g. glibc's debug/segfault.c). */ - regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (unsigned long) ksig->ka.sa.sa_handler; regs->ex1 = PL_ICS_EX1(USER_PL, 1); /* set crit sec in handler */ regs->sp = (unsigned long) frame; regs->lr = restorer; @@ -212,8 +212,9 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->flags |= PT_FLAGS_CALLER_SAVES; return 0; -give_sigsegv: - signal_fault("bad setup frame", regs, frame, sig); +err: + trace_unhandled_signal("bad sigreturn frame", regs, + (unsigned long)frame, SIGSEGV); return -EFAULT; } @@ -221,9 +222,7 @@ give_sigsegv: * OK, we're invoking a handler */ -static void handle_signal(unsigned long sig, siginfo_t *info, - struct k_sigaction *ka, - struct pt_regs *regs) +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) { sigset_t *oldset = sigmask_to_save(); int ret; @@ -238,7 +237,7 @@ static void handle_signal(unsigned long sig, siginfo_t *info, break; case -ERESTARTSYS: - if (!(ka->sa.sa_flags & SA_RESTART)) { + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { regs->regs[0] = -EINTR; break; } @@ -254,14 +253,12 @@ static void handle_signal(unsigned long sig, siginfo_t *info, /* Set up the stack frame */ #ifdef CONFIG_COMPAT if (is_compat_task()) - ret = compat_setup_rt_frame(sig, ka, info, oldset, regs); + ret = compat_setup_rt_frame(ksig, oldset, regs); else #endif - ret = setup_rt_frame(sig, ka, info, oldset, regs); - if (ret) - return; - signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLESTEP)); + ret = setup_rt_frame(ksig, oldset, regs); + + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); } /* @@ -271,9 +268,7 @@ static void handle_signal(unsigned long sig, siginfo_t *info, */ void do_signal(struct pt_regs *regs) { - siginfo_t info; - int signr; - struct k_sigaction ka; + struct ksignal ksig; /* * i386 will check if we're coming from kernel mode and bail out @@ -282,10 +277,9 @@ void do_signal(struct pt_regs *regs) * helpful, we can reinstate the check on "!user_mode(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); goto done; } |