diff options
author | Paul Mundt <lethal@linux-sh.org> | 2008-12-10 11:46:18 +0100 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-12-22 10:44:04 +0100 |
commit | 94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37 (patch) | |
tree | 7bfd32774ea72cbf0da11ed074dd449a31dbed0b /arch/sh/include | |
parent | sh: Handle cases where setup{_rt,}_frame() fail on SH-5 signal delivery. (diff) | |
download | linux-94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37.tar.xz linux-94e2fb3d3e1f4cb6bad2b13c572c4c99ad734a37.zip |
sh: Provide asm/syscall.h for SH-5.
This provides the asm/syscall.h implementation for sh64 parts.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include')
-rw-r--r-- | arch/sh/include/asm/syscall_64.h | 76 |
1 files changed, 75 insertions, 1 deletions
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 <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, ®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 */ |