/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_SYSCALL_H #define __ASM_SYSCALL_H #include <linux/sched.h> #include <linux/err.h> #include <abi/regdef.h> static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { return regs_syscallid(regs); } static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { regs->a0 = regs->orig_a0; } static inline long syscall_get_error(struct task_struct *task, struct pt_regs *regs) { unsigned long error = regs->a0; return IS_ERR_VALUE(error) ? error : 0; } static inline long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) { return regs->a0; } static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { regs->a0 = (long) error ?: 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); if (i == 0) { args[0] = regs->orig_a0; args++; i++; n--; } memcpy(args, ®s->a1 + i * sizeof(regs->a1), 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); if (i == 0) { regs->orig_a0 = args[0]; args++; i++; n--; } memcpy(®s->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0)); } #endif /* __ASM_SYSCALL_H */