Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Roland McGrath |
322 |
59.19% |
3 |
7.89% |
| Andrew Lutomirski |
39 |
7.17% |
10 |
26.32% |
| Harvey Harrison |
32 |
5.88% |
3 |
7.89% |
| Will Drewry |
29 |
5.33% |
1 |
2.63% |
| Linus Torvalds |
27 |
4.96% |
1 |
2.63% |
| Benjamin Thiel |
24 |
4.41% |
1 |
2.63% |
| H. Peter Anvin |
16 |
2.94% |
5 |
13.16% |
| Dmitry V. Levin |
16 |
2.94% |
1 |
2.63% |
| Dominik Brodowski |
7 |
1.29% |
1 |
2.63% |
| Thomas Gleixner |
7 |
1.29% |
2 |
5.26% |
| Petr Tesarik |
6 |
1.10% |
1 |
2.63% |
| Andi Kleen |
6 |
1.10% |
2 |
5.26% |
| Mike Frysinger |
5 |
0.92% |
1 |
2.63% |
| Brian Gerst |
3 |
0.55% |
2 |
5.26% |
| Pawan Gupta |
2 |
0.37% |
1 |
2.63% |
| Eric Paris |
1 |
0.18% |
1 |
2.63% |
| Steven Rostedt |
1 |
0.18% |
1 |
2.63% |
| Arnd Bergmann |
1 |
0.18% |
1 |
2.63% |
| Total |
544 |
|
38 |
|
/* 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>
/* This is used purely for kernel/trace/trace_syscalls.c */
typedef long (*sys_call_ptr_t)(const struct pt_regs *);
extern const sys_call_ptr_t sys_call_table[];
/*
* These may not exist, but still put the prototypes in so we
* can use IS_ENABLED().
*/
extern long ia32_sys_call(const struct pt_regs *, unsigned int nr);
extern long x32_sys_call(const struct pt_regs *, unsigned int nr);
extern long x64_sys_call(const struct pt_regs *, unsigned int nr);
/*
* 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;
}
bool do_syscall_64(struct pt_regs *regs, int nr);
void do_int80_emulation(struct pt_regs *regs);
#endif /* CONFIG_X86_32 */
void do_int80_syscall_32(struct pt_regs *regs);
bool do_fast_syscall_32(struct pt_regs *regs);
bool do_SYSENTER_32(struct pt_regs *regs);
#endif /* _ASM_X86_SYSCALL_H */