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/* 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 */
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