diff options
Diffstat (limited to 'arch/sh/include/asm/syscall_32.h')
-rw-r--r-- | arch/sh/include/asm/syscall_32.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h new file mode 100644 index 000000000..d87738eeb --- /dev/null +++ b/arch/sh/include/asm/syscall_32.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_SYSCALL_32_H +#define __ASM_SH_SYSCALL_32_H + +#include <uapi/linux/audit.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/err.h> +#include <asm/ptrace.h> + +/* The system call number is given by the user in R3 */ +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return (regs->tra >= 0) ? regs->regs[3] : -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 r0 value anywhere. + */ +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->regs[0]; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->regs[0] = (long) error ?: val; +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned long *args) +{ + + /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ + args[5] = regs->regs[1]; + args[4] = regs->regs[0]; + args[3] = regs->regs[7]; + args[2] = regs->regs[6]; + args[1] = regs->regs[5]; + args[0] = regs->regs[4]; +} + +static inline int syscall_get_arch(struct task_struct *task) +{ + int arch = AUDIT_ARCH_SH; + +#ifdef CONFIG_CPU_LITTLE_ENDIAN + arch |= __AUDIT_ARCH_LE; +#endif + return arch; +} +#endif /* __ASM_SH_SYSCALL_32_H */ |