diff options
Diffstat (limited to 'arch/sh/include/asm/syscall_64.h')
-rw-r--r-- | arch/sh/include/asm/syscall_64.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h new file mode 100644 index 000000000..43882580c --- /dev/null +++ b/arch/sh/include/asm/syscall_64.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_SYSCALL_64_H +#define __ASM_SH_SYSCALL_64_H + +#include <uapi/linux/audit.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])); +} + +static inline int syscall_get_arch(void) +{ + int arch = AUDIT_ARCH_SH; + +#ifdef CONFIG_64BIT + arch |= __AUDIT_ARCH_64BIT; +#endif +#ifdef CONFIG_CPU_LITTLE_ENDIAN + arch |= __AUDIT_ARCH_LE; +#endif + + return arch; +} +#endif /* __ASM_SH_SYSCALL_64_H */ |