Contributors: 15
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Roland McGrath |
322 |
63.26% |
3 |
8.57% |
| Andrew Lutomirski |
44 |
8.64% |
11 |
31.43% |
| Harvey Harrison |
32 |
6.29% |
3 |
8.57% |
| Will Drewry |
29 |
5.70% |
1 |
2.86% |
| Dmitry V. Levin |
16 |
3.14% |
1 |
2.86% |
| H. Peter Anvin |
12 |
2.36% |
5 |
14.29% |
| Benjamin Thiel |
11 |
2.16% |
1 |
2.86% |
| Mike Frysinger |
9 |
1.77% |
1 |
2.86% |
| Andi Kleen |
8 |
1.57% |
2 |
5.71% |
| Dominik Brodowski |
7 |
1.38% |
1 |
2.86% |
| Thomas Gleixner |
7 |
1.38% |
2 |
5.71% |
| Petr Tesarik |
6 |
1.18% |
1 |
2.86% |
| Brian Gerst |
4 |
0.79% |
1 |
2.86% |
| Eric Paris |
1 |
0.20% |
1 |
2.86% |
| Steven Rostedt |
1 |
0.20% |
1 |
2.86% |
| Total |
509 |
|
35 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Access to user system call parameters and results
*
* Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
*
* See asm-generic/syscall.h for descriptions of what we must do here.
*/
#ifndef _ASM_X86_SYSCALL_H
#define _ASM_X86_SYSCALL_H
#include <uapi/linux/audit.h>
#include <linux/sched.h>
#include <linux/err.h>
#include <asm/thread_info.h> /* for TS_COMPAT */
#include <asm/unistd.h>
typedef long (*sys_call_ptr_t)(const struct pt_regs *);
extern const sys_call_ptr_t sys_call_table[];
#if defined(CONFIG_X86_32)
#define ia32_sys_call_table sys_call_table
#else
/*
* These may not exist, but still put the prototypes in so we
* can use IS_ENABLED().
*/
extern const sys_call_ptr_t ia32_sys_call_table[];
extern const sys_call_ptr_t x32_sys_call_table[];
#endif
/*
* Only the low 32 bits of orig_ax are meaningful, so we return int.
* This importantly ignores the high bits on 64-bit, so comparisons
* sign-extend the low 32 bits.
*/
static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
return regs->orig_ax;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
regs->ax = regs->orig_ax;
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
unsigned long error = regs->ax;
#ifdef CONFIG_IA32_EMULATION
/*
* TS_COMPAT is set for 32-bit syscall entries and then
* remains set until we return to user mode.
*/
if (task->thread_info.status & (TS_COMPAT|TS_I386_REGS_POKED))
/*
* Sign-extend the value so (int)-EFOO becomes (long)-EFOO
* and will match correctly in comparisons.
*/
error = (long) (int) error;
#endif
return IS_ERR_VALUE(error) ? error : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->ax;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->ax = (long) error ?: val;
}
#ifdef CONFIG_X86_32
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
memcpy(args, ®s->bx, 6 * sizeof(args[0]));
}
static inline int syscall_get_arch(struct task_struct *task)
{
return AUDIT_ARCH_I386;
}
#else /* CONFIG_X86_64 */
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
# ifdef CONFIG_IA32_EMULATION
if (task->thread_info.status & TS_COMPAT) {
*args++ = regs->bx;
*args++ = regs->cx;
*args++ = regs->dx;
*args++ = regs->si;
*args++ = regs->di;
*args = regs->bp;
} else
# endif
{
*args++ = regs->di;
*args++ = regs->si;
*args++ = regs->dx;
*args++ = regs->r10;
*args++ = regs->r8;
*args = regs->r9;
}
}
static inline int syscall_get_arch(struct task_struct *task)
{
/* x32 tasks should be considered AUDIT_ARCH_X86_64. */
return (IS_ENABLED(CONFIG_IA32_EMULATION) &&
task->thread_info.status & TS_COMPAT)
? AUDIT_ARCH_I386 : AUDIT_ARCH_X86_64;
}
void do_syscall_64(struct pt_regs *regs, int nr);
void do_int80_syscall_32(struct pt_regs *regs);
long do_fast_syscall_32(struct pt_regs *regs);
#endif /* CONFIG_X86_32 */
#endif /* _ASM_X86_SYSCALL_H */