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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c
4 * with some changes for UML.
5 */
6
7#include <linux/linkage.h>
8#include <linux/sys.h>
9#include <linux/cache.h>
10#include <generated/user_constants.h>
11#include <asm/syscall.h>
12
13#define __NO_STUBS
14
15/*
16 * Below you can see, in terms of #define's, the differences between the x86-64
17 * and the UML syscall table.
18 */
19
20/* Not going to be implemented by UML, since we have no hardware. */
21#define sys_iopl sys_ni_syscall
22#define sys_ioperm sys_ni_syscall
23
24/*
25 * The UML TLS problem. Note that x86_64 does not implement this, so the below
26 * is needed only for the ia32 compatibility.
27 */
28
29/* On UML we call it this way ("old" means it's not mmap2) */
30#define sys_mmap old_mmap
31
32#define stub_clone sys_clone
33#define stub_fork sys_fork
34#define stub_vfork sys_vfork
35#define stub_execve sys_execve
36#define stub_execveat sys_execveat
37#define stub_rt_sigreturn sys_rt_sigreturn
38
39#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
40#include <asm/syscalls_64.h>
41
42#undef __SYSCALL_64
43#define __SYSCALL_64(nr, sym, qual) [ nr ] = sym,
44
45extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
46
47const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
48 /*
49 * Smells like a compiler bug -- it doesn't work
50 * when the & below is removed.
51 */
52 [0 ... __NR_syscall_max] = &sys_ni_syscall,
53#include <asm/syscalls_64.h>
54};
55
56int syscall_table_size = sizeof(sys_call_table);