aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/sh/include/asm/syscall_64.h76
-rw-r--r--arch/sh/kernel/signal_32.c1
-rw-r--r--arch/sh/kernel/signal_64.c63
3 files changed, 108 insertions, 32 deletions
diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h
index bcaaa8ca4d7..e95f3ae30af 100644
--- a/arch/sh/include/asm/syscall_64.h
+++ b/arch/sh/include/asm/syscall_64.h
@@ -1,6 +1,80 @@
#ifndef __ASM_SH_SYSCALL_64_H
#define __ASM_SH_SYSCALL_64_H
-#include <asm-generic/syscall.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <asm/ptrace.h>
+
+/* The system call number is given by the user in R9 */
+static inline long syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ /*
+ * XXX: This needs some thought. On SH we don't
+ * save away the original R9 value anywhere.
+ */
+}
+
+static inline bool syscall_has_error(struct pt_regs *regs)
+{
+ return (regs->sr & 0x1) ? true : false;
+}
+static inline void syscall_set_error(struct pt_regs *regs)
+{
+ regs->sr |= 0x1;
+}
+static inline void syscall_clear_error(struct pt_regs *regs)
+{
+ regs->sr &= ~0x1;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return syscall_has_error(regs) ? regs->regs[9] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->regs[9];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ if (error) {
+ syscall_set_error(regs);
+ regs->regs[9] = -error;
+ } else {
+ syscall_clear_error(regs);
+ regs->regs[9] = val;
+ }
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ memcpy(args, &regs->reg[2 + i], n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ const unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ memcpy(&regs->reg[2 + i], args, n * sizeof(args[0]));
+}
#endif /* __ASM_SH_SYSCALL_64_H */
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 69d09c0b349..77c21bde376 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -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);
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index 08828ddd97f..b22fdfaaa19 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 04:52:05 +0000