mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 05:49:10 +07:00
63238f2cc5
The following build error is seen if CONFIG_32BIT is undefined,
CONFIG_64BIT is defined, and CONFIG_MIPS32_O32 is undefined.
asm/syscall.h: In function 'mips_get_syscall_arg':
arch/mips/include/asm/syscall.h:32:16: error: unused variable 'usp' [-Werror=unused-variable]
cc1: all warnings being treated as errors
Fixes: c0ff3c53d4 ('MIPS: Enable HAVE_ARCH_TRACEHOOK')
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6160/
117 lines
2.4 KiB
C
117 lines
2.4 KiB
C
/*
|
|
* Access to user system call parameters and results
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* See asm-generic/syscall.h for descriptions of what we must do here.
|
|
*
|
|
* Copyright (C) 2012 Ralf Baechle <ralf@linux-mips.org>
|
|
*/
|
|
|
|
#ifndef __ASM_MIPS_SYSCALL_H
|
|
#define __ASM_MIPS_SYSCALL_H
|
|
|
|
#include <linux/audit.h>
|
|
#include <linux/elf-em.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
static inline long syscall_get_nr(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return regs->regs[2];
|
|
}
|
|
|
|
static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
|
|
struct task_struct *task, struct pt_regs *regs, unsigned int n)
|
|
{
|
|
unsigned long usp __maybe_unused = regs->regs[29];
|
|
|
|
switch (n) {
|
|
case 0: case 1: case 2: case 3:
|
|
*arg = regs->regs[4 + n];
|
|
|
|
return 0;
|
|
|
|
#ifdef CONFIG_32BIT
|
|
case 4: case 5: case 6: case 7:
|
|
return get_user(*arg, (int *)usp + 4 * n);
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT
|
|
case 4: case 5: case 6: case 7:
|
|
#ifdef CONFIG_MIPS32_O32
|
|
if (test_thread_flag(TIF_32BIT_REGS))
|
|
return get_user(*arg, (int *)usp + 4 * n);
|
|
else
|
|
#endif
|
|
*arg = regs->regs[4 + n];
|
|
|
|
return 0;
|
|
#endif
|
|
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return regs->regs[2];
|
|
}
|
|
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
int error, long val)
|
|
{
|
|
if (error) {
|
|
regs->regs[2] = -error;
|
|
regs->regs[7] = -1;
|
|
} else {
|
|
regs->regs[2] = val;
|
|
regs->regs[7] = 0;
|
|
}
|
|
}
|
|
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
unsigned int i, unsigned int n,
|
|
unsigned long *args)
|
|
{
|
|
unsigned long arg;
|
|
int ret;
|
|
|
|
while (n--)
|
|
ret |= mips_get_syscall_arg(&arg, task, regs, i++);
|
|
|
|
/*
|
|
* No way to communicate an error because this is a void function.
|
|
*/
|
|
#if 0
|
|
return ret;
|
|
#endif
|
|
}
|
|
|
|
extern const unsigned long sys_call_table[];
|
|
extern const unsigned long sys32_call_table[];
|
|
extern const unsigned long sysn32_call_table[];
|
|
|
|
static inline int __syscall_get_arch(void)
|
|
{
|
|
int arch = EM_MIPS;
|
|
#ifdef CONFIG_64BIT
|
|
arch |= __AUDIT_ARCH_64BIT;
|
|
#endif
|
|
#if defined(__LITTLE_ENDIAN)
|
|
arch |= __AUDIT_ARCH_LE;
|
|
#endif
|
|
return arch;
|
|
}
|
|
|
|
#endif /* __ASM_MIPS_SYSCALL_H */
|