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/s390/kernel | |
parent | ad1f5caf34390bb20fdbb4eaf71b0494e89936f0 (diff) | |
parent | 059ade650ae57cfd371af690fdba887af04aded8 (diff) |
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/s390/kernel')
-rw-r--r-- | arch/s390/kernel/compat_signal.c | 79 | ||||
-rw-r--r-- | arch/s390/kernel/entry.h | 4 | ||||
-rw-r--r-- | arch/s390/kernel/signal.c | 78 |
3 files changed, 69 insertions, 92 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index f204d6920368..598b0b42668b 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -320,38 +320,39 @@ static inline int map_signal(int sig) return sig; } -static int setup_frame32(int sig, struct k_sigaction *ka, - sigset_t *set, struct pt_regs * regs) +static int setup_frame32(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { - sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); + int sig = ksig->sig; + sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(sigframe32)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) - goto give_sigsegv; + return -EFAULT; if (save_sigregs32(regs, &frame->sregs)) - goto give_sigsegv; + return -EFAULT; if (save_sigregs_gprs_high(regs, frame->gprs_high)) - goto give_sigsegv; + return -EFAULT; if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE; } else { regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 __force __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (__force __u64) frame; @@ -359,7 +360,7 @@ static int setup_frame32(int sig, struct k_sigaction *ka, regs->psw.mask = PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); - regs->psw.addr = (__force __u64) ka->sa.sa_handler; + regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler; regs->gprs[2] = map_signal(sig); regs->gprs[3] = (__force __u64) &frame->sc; @@ -376,25 +377,21 @@ static int setup_frame32(int sig, struct k_sigaction *ka, /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo)) - goto give_sigsegv; + return -EFAULT; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } -static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs * regs) +static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { int err = 0; - rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); + rt_sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe32)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; - if (copy_siginfo_to_user32(&frame->info, info)) - goto give_sigsegv; + if (copy_siginfo_to_user32(&frame->info, &ksig->info)) + return -EFAULT; /* Create the ucontext. */ err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); @@ -404,22 +401,22 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, err |= save_sigregs_gprs_high(regs, frame->gprs_high); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { - regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE; } else { regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 __force __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (__force __u64) frame; @@ -427,36 +424,30 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, regs->psw.mask = PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); - regs->psw.addr = (__u64 __force) ka->sa.sa_handler; + regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler; - regs->gprs[2] = map_signal(sig); + regs->gprs[2] = map_signal(ksig->sig); regs->gprs[3] = (__force __u64) &frame->info; regs->gprs[4] = (__force __u64) &frame->uc; regs->gprs[5] = task_thread_info(current)->last_break; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } /* * OK, we're invoking a handler */ -void handle_signal32(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) +void handle_signal32(struct ksignal *ksig, sigset_t *oldset, + struct pt_regs *regs) { int ret; /* Set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame32(sig, ka, info, oldset, regs); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) + ret = setup_rt_frame32(ksig, oldset, regs); else - ret = setup_frame32(sig, ka, oldset, regs); - if (ret) - return; - signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLE_STEP)); + ret = setup_frame32(ksig, oldset, regs); + + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP)); } diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h index 6ac78192455f..1aad48398d06 100644 --- a/arch/s390/kernel/entry.h +++ b/arch/s390/kernel/entry.h @@ -48,8 +48,8 @@ void do_per_trap(struct pt_regs *regs); void syscall_trace(struct pt_regs *regs, int entryexit); void kernel_stack_overflow(struct pt_regs * regs); void do_signal(struct pt_regs *regs); -void handle_signal32(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, struct pt_regs *regs); +void handle_signal32(struct ksignal *ksig, sigset_t *oldset, + struct pt_regs *regs); void do_notify_resume(struct pt_regs *regs); void __init init_IRQ(void); diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index 42b49f9e19bf..469c4c6d9182 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -200,15 +200,15 @@ static int setup_frame(int sig, struct k_sigaction *ka, frame = get_sigframe(ka, regs, sizeof(sigframe)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE)) - goto give_sigsegv; + return -EFAULT; if (save_sigregs(regs, &frame->sregs)) - goto give_sigsegv; + return -EFAULT; if (__put_user(&frame->sregs, &frame->sc.sregs)) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ @@ -220,12 +220,12 @@ static int setup_frame(int sig, struct k_sigaction *ka, frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, (u16 __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; @@ -250,27 +250,23 @@ static int setup_frame(int sig, struct k_sigaction *ka, /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) - goto give_sigsegv; + return -EFAULT; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } -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) { int err = 0; rt_sigframe __user *frame; - frame = get_sigframe(ka, regs, sizeof(rt_sigframe)); + frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe)); if (frame == (void __user *) -1UL) - goto give_sigsegv; + return -EFAULT; - if (copy_siginfo_to_user(&frame->info, info)) - goto give_sigsegv; + if (copy_siginfo_to_user(&frame->info, &ksig->info)) + return -EFAULT; /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); @@ -279,24 +275,24 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= save_sigregs(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + return -EFAULT; /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { + if (ksig->ka.sa.sa_flags & SA_RESTORER) { regs->gprs[14] = (unsigned long) - ka->sa.sa_restorer | PSW_ADDR_AMODE; + ksig->ka.sa.sa_restorer | PSW_ADDR_AMODE; } else { regs->gprs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, (u16 __user *)(frame->retcode))) - goto give_sigsegv; + return -EFAULT; } /* Set up backchain. */ if (__put_user(regs->gprs[15], (addr_t __user *) frame)) - goto give_sigsegv; + return -EFAULT; /* Set up registers for signal handler */ regs->gprs[15] = (unsigned long) frame; @@ -304,34 +300,27 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA | (PSW_USER_BITS & PSW_MASK_ASC) | (regs->psw.mask & ~PSW_MASK_ASC); - regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE; + regs->psw.addr = (unsigned long) ksig->ka.sa.sa_handler | PSW_ADDR_AMODE; - regs->gprs[2] = map_signal(sig); + regs->gprs[2] = map_signal(ksig->sig); regs->gprs[3] = (unsigned long) &frame->info; regs->gprs[4] = (unsigned long) &frame->uc; regs->gprs[5] = task_thread_info(current)->last_break; return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; } -static void handle_signal(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, - struct pt_regs *regs) +static void handle_signal(struct ksignal *ksig, sigset_t *oldset, + struct pt_regs *regs) { int ret; /* Set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame(sig, ka, info, oldset, regs); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) + ret = setup_rt_frame(ksig, oldset, regs); else - ret = setup_frame(sig, ka, oldset, regs); - if (ret) - return; - signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLE_STEP)); + ret = setup_frame(ksig->sig, &ksig->ka, oldset, regs); + + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP)); } /* @@ -345,9 +334,7 @@ static void handle_signal(unsigned long sig, struct k_sigaction *ka, */ void do_signal(struct pt_regs *regs) { - siginfo_t info; - int signr; - struct k_sigaction ka; + struct ksignal ksig; sigset_t *oldset = sigmask_to_save(); /* @@ -357,9 +344,8 @@ void do_signal(struct pt_regs *regs) */ current_thread_info()->system_call = test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0; - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) { + if (get_signal(&ksig)) { /* Whee! Actually deliver the signal. */ if (current_thread_info()->system_call) { regs->int_code = current_thread_info()->system_call; @@ -370,7 +356,7 @@ void do_signal(struct pt_regs *regs) regs->gprs[2] = -EINTR; break; case -ERESTARTSYS: - if (!(ka.sa.sa_flags & SA_RESTART)) { + if (!(ksig.ka.sa.sa_flags & SA_RESTART)) { regs->gprs[2] = -EINTR; break; } @@ -387,9 +373,9 @@ void do_signal(struct pt_regs *regs) clear_pt_regs_flag(regs, PIF_SYSCALL); if (is_compat_task()) - handle_signal32(signr, &ka, &info, oldset, regs); + handle_signal32(&ksig, oldset, regs); else - handle_signal(signr, &ka, &info, oldset, regs); + handle_signal(&ksig, oldset, regs); return; } |