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https://github.com/edk2-porting/linux-next.git
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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
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#define __ASM_SH_SYSCALL_64_H
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <asm/ptrace.h>
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/* The system call number is given by the user in R9 */
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static inline long syscall_get_nr(struct task_struct *task,
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struct pt_regs *regs)
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{
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return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
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}
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static inline void syscall_rollback(struct task_struct *task,
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struct pt_regs *regs)
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{
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/*
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* XXX: This needs some thought. On SH we don't
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* save away the original R9 value anywhere.
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*/
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}
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static inline long syscall_get_error(struct task_struct *task,
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struct pt_regs *regs)
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{
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return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
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}
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static inline long syscall_get_return_value(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->regs[9];
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}
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static inline void syscall_set_return_value(struct task_struct *task,
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struct pt_regs *regs,
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int error, long val)
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{
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if (error)
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regs->regs[9] = -error;
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else
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regs->regs[9] = val;
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}
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static inline void syscall_get_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned int i, unsigned int n,
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unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(args, ®s->regs[2 + i], n * sizeof(args[0]));
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}
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static inline void syscall_set_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned int i, unsigned int n,
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const unsigned long *args)
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{
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BUG_ON(i + n > 6);
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memcpy(®s->regs[2 + i], args, n * sizeof(args[0]));
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}
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#endif /* __ASM_SH_SYSCALL_64_H */
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