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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_MICROBLAZE_SYSCALL_H
#define __ASM_MICROBLAZE_SYSCALL_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 R12 */
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r12;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
/* TODO. */
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r3;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
if (error)
regs->r3 = -error;
else
regs->r3 = val;
}
static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
unsigned int n)
{
switch (n) {
case 5: return regs->r10;
case 4: return regs->r9;
case 3: return regs->r8;
case 2: return regs->r7;
case 1: return regs->r6;
case 0: return regs->r5;
default:
BUG();
}
return ~0;
}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
unsigned int i = 0;
unsigned int n = 6;
while (n--)
*args++ = microblaze_get_syscall_arg(regs, i++);
}
asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
static inline int syscall_get_arch(struct task_struct *task)
{
return AUDIT_ARCH_MICROBLAZE;
}
#endif /* __ASM_MICROBLAZE_SYSCALL_H */