blob: ef42ec01eaff37692d1f861a4c1966a2c718e72d [file] [log] [blame]
Jeff Dike95906b22008-02-04 22:31:20 -08001/*
2 * System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
3 * with some changes for UML.
4 */
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -07005
6#include <linux/linkage.h>
7#include <linux/sys.h>
8#include <linux/cache.h>
Al Viroecec5ba2007-05-15 20:36:00 +01009#include <kern_constants.h>
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070010
11#define __NO_STUBS
12
Jeff Dike95906b22008-02-04 22:31:20 -080013/*
14 * Below you can see, in terms of #define's, the differences between the x86-64
15 * and the UML syscall table.
16 */
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070017
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
Jeff Dike95906b22008-02-04 22:31:20 -080022/*
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 */
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070026
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070027/* On UML we call it this way ("old" means it's not mmap2) */
28#define sys_mmap old_mmap
Jeff Dike95906b22008-02-04 22:31:20 -080029/*
30 * On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
31 * See arch/x86_64/kernel/sys_x86_64.c
32 */
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070033#define sys_uname sys_uname64
34
35#define stub_clone sys_clone
36#define stub_fork sys_fork
37#define stub_vfork sys_vfork
38#define stub_execve sys_execve
39#define stub_rt_sigsuspend sys_rt_sigsuspend
40#define stub_sigaltstack sys_sigaltstack
41#define stub_rt_sigreturn sys_rt_sigreturn
42
43#define __SYSCALL(nr, sym) extern asmlinkage void sym(void) ;
Hiroshi Shimamotob76d69e2008-08-14 17:25:37 -070044#undef ASM_X86__UNISTD_64_H
Al Virobb898552008-08-17 21:05:42 -040045#include "../../x86/include/asm/unistd_64.h"
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070046
47#undef __SYSCALL
48#define __SYSCALL(nr, sym) [ nr ] = sym,
Hiroshi Shimamotob76d69e2008-08-14 17:25:37 -070049#undef ASM_X86__UNISTD_64_H
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070050
51typedef void (*sys_call_ptr_t)(void);
52
53extern void sys_ni_syscall(void);
54
Jeff Dikef87ea912008-02-04 22:31:29 -080055/*
56 * We used to have a trick here which made sure that holes in the
57 * x86_64 table were filled in with sys_ni_syscall, but a comment in
58 * unistd_64.h says that holes aren't allowed, so the trick was
59 * removed.
60 * The trick looked like this
61 * [0 ... UM_NR_syscall_max] = &sys_ni_syscall
62 * before including unistd_64.h - the later initializations overwrote
63 * the sys_ni_syscall filler.
64 */
65
66sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
Al Virobb898552008-08-17 21:05:42 -040067#include "../../x86/include/asm/unistd_64.h"
Paolo 'Blaisorblade' Giarrusso80f95072005-05-01 08:58:55 -070068};
Jeff Dikef87ea912008-02-04 22:31:29 -080069
70int syscall_table_size = sizeof(sys_call_table);