mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 18:24:14 +08:00
03f07876df
The T-bit manipulation for syscall error checking had the side effect of spuriously returning ERESTART* errno values over EINTR. So, we simplify the error checking a bit and leave the T-bit alone. Reported-by: Kaz Kojima <kkojima@rr.iij4u.or.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef __ASM_SH_SYSCALL_64_H
|
|
#define __ASM_SH_SYSCALL_64_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 long syscall_get_error(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return IS_ERR_VALUE(regs->regs[9]) ? 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)
|
|
regs->regs[9] = -error;
|
|
else
|
|
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, ®s->regs[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(®s->regs[2 + i], args, n * sizeof(args[0]));
|
|
}
|
|
|
|
#endif /* __ASM_SH_SYSCALL_64_H */
|