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author | Paul Mundt <lethal@linux-sh.org> | 2008-12-10 10:46:18 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-12-22 09:44:04 (GMT) |
commit | 94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37 (patch) | |
tree | 7bfd32774ea72cbf0da11ed074dd449a31dbed0b /arch/sh/kernel/signal_64.c | |
parent | 6ac034375fe8b4341137657adf5e6ff0dcb5a99f (diff) | |
download | linux-fsl-qoriq-94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37.tar.xz |
sh: Provide asm/syscall.h for SH-5.
This provides the asm/syscall.h implementation for sh64 parts.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/signal_64.c')
-rw-r--r-- | arch/sh/kernel/signal_64.c | 63 |
1 files changed, 33 insertions, 30 deletions
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c index 08828dd..b22fdfa 100644 --- a/arch/sh/kernel/signal_64.c +++ b/arch/sh/kernel/signal_64.c @@ -47,6 +47,34 @@ static int handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs); +static inline void +handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa) +{ + /* If we're not from a syscall, bail out */ + if (regs->syscall_nr < 0) + return; + + /* check for system call restart.. */ + switch (regs->regs[REG_RET]) { + case -ERESTART_RESTARTBLOCK: + case -ERESTARTNOHAND: + no_system_call_restart: + regs->regs[REG_RET] = -EINTR; + regs->sr |= 1; + break; + + case -ERESTARTSYS: + if (!(sa->sa_flags & SA_RESTART)) + goto no_system_call_restart; + /* fallthrough */ + case -ERESTARTNOINTR: + /* Decode syscall # */ + regs->regs[REG_RET] = regs->syscall_nr; + regs->pc -= 4; + break; + } +} + /* * Note that 'init' is a special process: it doesn't get signals it doesn't * want to handle. Thus you cannot kill init even with a SIGKILL even by @@ -81,6 +109,9 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) signr = get_signal_to_deliver(&info, &ka, regs, 0); if (signr > 0) { + if (regs->sr & 1) + handle_syscall_restart(regs, &ka.sa); + /* Whee! Actually deliver the signal. */ if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { /* @@ -128,7 +159,6 @@ no_signal: /* * Atomically swap in the new signal mask, and wait for a signal. */ - asmlinkage int sys_sigsuspend(old_sigset_t mask, unsigned long r3, unsigned long r4, unsigned long r5, @@ -234,20 +264,16 @@ sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, return do_sigaltstack(uss, uoss, REF_REG_SP); } - /* * Do a signal return; undo the signal stack. */ - -struct sigframe -{ +struct sigframe { struct sigcontext sc; unsigned long extramask[_NSIG_WORDS-1]; long long retcode[2]; }; -struct rt_sigframe -{ +struct rt_sigframe { struct siginfo __user *pinfo; void *puc; struct siginfo info; @@ -449,7 +475,6 @@ badframe: /* * Set up a signal frame. */ - static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned long mask) @@ -714,34 +739,12 @@ give_sigsegv: /* * OK, we're invoking a handler */ - static int handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs) { int ret; - /* Are we from a system call? */ - if (regs->syscall_nr >= 0) { - /* If so, check system call restarting.. */ - switch (regs->regs[REG_RET]) { - case -ERESTART_RESTARTBLOCK: - case -ERESTARTNOHAND: - no_system_call_restart: - regs->regs[REG_RET] = -EINTR; - break; - - case -ERESTARTSYS: - if (!(ka->sa.sa_flags & SA_RESTART)) - goto no_system_call_restart; - /* fallthrough */ - case -ERESTARTNOINTR: - /* Decode syscall # */ - regs->regs[REG_RET] = regs->syscall_nr; - regs->pc -= 4; - } - } - /* Set up the stack frame */ if (ka->sa.sa_flags & SA_SIGINFO) ret = setup_rt_frame(sig, ka, info, oldset, regs); |