From 94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 10 Dec 2008 19:46:18 +0900 Subject: sh: Provide asm/syscall.h for SH-5. This provides the asm/syscall.h implementation for sh64 parts. Signed-off-by: Paul Mundt --- arch/sh/include/asm/syscall_64.h | 76 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 75 insertions(+), 1 deletion(-) (limited to 'arch/sh/include/asm') diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h index bcaaa8ca4d70..e95f3ae30aff 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 +#include +#include +#include + +/* 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, ®s->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(®s->reg[2 + i], args, n * sizeof(args[0])); +} #endif /* __ASM_SH_SYSCALL_64_H */ -- cgit v1.2.3