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sh: Provide asm/syscall.h for SH-5.

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This provides the asm/syscall.h implementation for sh64 parts.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2008-12-10 19:46:18 +09:00
parent 6ac034375f
commit 94e2fb3d3e
3 changed files with 108 additions and 32 deletions
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1
arch/sh/kernel/signal_32.c
View File

@@ -533,7 +533,6 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
{
int ret;
/* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(sig, ka, info, oldset, regs);

63
arch/sh/kernel/signal_64.c
View File

@@ -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);