Commit | Line | Data |
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95906b24 JD |
1 | /* |
2 | * System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c | |
3 | * with some changes for UML. | |
4 | */ | |
80f95078 PBG |
5 | |
6 | #include <linux/linkage.h> | |
7 | #include <linux/sys.h> | |
8 | #include <linux/cache.h> | |
ecec5ba6 | 9 | #include <kern_constants.h> |
80f95078 PBG |
10 | |
11 | #define __NO_STUBS | |
12 | ||
95906b24 JD |
13 | /* |
14 | * Below you can see, in terms of #define's, the differences between the x86-64 | |
15 | * and the UML syscall table. | |
16 | */ | |
80f95078 PBG |
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 | ||
95906b24 JD |
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 | */ | |
80f95078 | 26 | |
80f95078 PBG |
27 | /* On UML we call it this way ("old" means it's not mmap2) */ |
28 | #define sys_mmap old_mmap | |
95906b24 JD |
29 | /* |
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 | */ | |
80f95078 PBG |
33 | #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) ; | |
1965aae3 | 44 | #undef _ASM_X86_UNISTD_64_H |
bb898558 | 45 | #include "../../x86/include/asm/unistd_64.h" |
80f95078 PBG |
46 | |
47 | #undef __SYSCALL | |
48 | #define __SYSCALL(nr, sym) [ nr ] = sym, | |
1965aae3 | 49 | #undef _ASM_X86_UNISTD_64_H |
80f95078 PBG |
50 | |
51 | typedef void (*sys_call_ptr_t)(void); | |
52 | ||
53 | extern void sys_ni_syscall(void); | |
54 | ||
f87ea91d JD |
55 | /* |
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 | ||
66 | sys_call_ptr_t sys_call_table[] __cacheline_aligned = { | |
bb898558 | 67 | #include "../../x86/include/asm/unistd_64.h" |
80f95078 | 68 | }; |
f87ea91d JD |
69 | |
70 | int syscall_table_size = sizeof(sys_call_table); |