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 <asm/syscall.h>
11
12extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long,
13				      unsigned long, unsigned long,
14				      unsigned long, unsigned long);
15
16/*
17 * Below you can see, in terms of #define's, the differences between the x86-64
18 * and the UML syscall table.
19 */
20
21/* Not going to be implemented by UML, since we have no hardware. */
22#define sys_iopl sys_ni_syscall
23#define sys_ioperm sys_ni_syscall
24
25#define __SYSCALL_NORETURN __SYSCALL
 
 
 
 
 
 
 
 
 
 
 
 
26
27#define __SYSCALL(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
 
 
 
28#include <asm/syscalls_64.h>
29#undef  __SYSCALL
30
31#define __SYSCALL(nr, sym) sym,
32const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
 
 
 
 
 
 
 
 
 
 
 
33#include <asm/syscalls_64.h>
34};
35
36int syscall_table_size = sizeof(sys_call_table);

 
 1/*
 2 * System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c
 3 * with some changes for UML.
 4 */
 5
 6#include <linux/linkage.h>
 7#include <linux/sys.h>
 8#include <linux/cache.h>
 9#include <generated/user_constants.h>
10
11#define __NO_STUBS
 
 
12
13/*
14 * Below you can see, in terms of #define's, the differences between the x86-64
15 * and the UML syscall table.
16 */
17
18/* Not going to be implemented by UML, since we have no hardware. */
19#define stub_iopl sys_ni_syscall
20#define sys_ioperm sys_ni_syscall
21
22/*
23 * The UML TLS problem. Note that x86_64 does not implement this, so the below
24 * is needed only for the ia32 compatibility.
25 */
26
27/* On UML we call it this way ("old" means it's not mmap2) */
28#define sys_mmap old_mmap
29
30#define stub_clone sys_clone
31#define stub_fork sys_fork
32#define stub_vfork sys_vfork
33#define stub_execve sys_execve
34#define stub_rt_sigreturn sys_rt_sigreturn
35
36#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
37#define __SYSCALL_X32(nr, sym, compat) /* Not supported */
38
39#define __SYSCALL_64(nr, sym, compat) extern asmlinkage void sym(void) ;
40#include <asm/syscalls_64.h>
 
41
42#undef __SYSCALL_64
43#define __SYSCALL_64(nr, sym, compat) [ nr ] = sym,
44
45typedef void (*sys_call_ptr_t)(void);
46
47extern void sys_ni_syscall(void);
48
49const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
50	/*
51	 * Smells like a compiler bug -- it doesn't work
52	 * when the & below is removed.
53	 */
54	[0 ... __NR_syscall_max] = &sys_ni_syscall,
55#include <asm/syscalls_64.h>
56};
57
58int syscall_table_size = sizeof(sys_call_table);