2 * Access to user system call parameters and results
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * See asm-generic/syscall.h for descriptions of what we must do here.
10 * Copyright (C) 2012 Ralf Baechle <ralf@linux-mips.org>
13 #ifndef __ASM_MIPS_SYSCALL_H
14 #define __ASM_MIPS_SYSCALL_H
16 #include <linux/compiler.h>
17 #include <linux/audit.h>
18 #include <linux/elf-em.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/uaccess.h>
22 #include <asm/ptrace.h>
24 static inline long syscall_get_nr(struct task_struct *task,
30 static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
31 struct task_struct *task, struct pt_regs *regs, unsigned int n)
33 unsigned long usp __maybe_unused = regs->regs[29];
36 case 0: case 1: case 2: case 3:
37 *arg = regs->regs[4 + n];
42 case 4: case 5: case 6: case 7:
43 return get_user(*arg, (int *)usp + n);
47 case 4: case 5: case 6: case 7:
48 #ifdef CONFIG_MIPS32_O32
49 if (test_thread_flag(TIF_32BIT_REGS))
50 return get_user(*arg, (int *)usp + n);
53 *arg = regs->regs[4 + n];
65 static inline long syscall_get_return_value(struct task_struct *task,
71 static inline void syscall_set_return_value(struct task_struct *task,
76 regs->regs[2] = -error;
84 static inline void syscall_get_arguments(struct task_struct *task,
86 unsigned int i, unsigned int n,
92 ret |= mips_get_syscall_arg(args++, task, regs, i++);
95 * No way to communicate an error because this is a void function.
102 extern const unsigned long sys_call_table[];
103 extern const unsigned long sys32_call_table[];
104 extern const unsigned long sysn32_call_table[];
106 static inline int __syscall_get_arch(void)
110 arch |= __AUDIT_ARCH_64BIT;
112 #if defined(__LITTLE_ENDIAN)
113 arch |= __AUDIT_ARCH_LE;
118 #endif /* __ASM_MIPS_SYSCALL_H */