Jeff Dike | 95906b2 | 2008-02-04 22:31:20 -0800 | [diff] [blame] | 1 | /* |
| 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' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 5 | |
| 6 | #include <linux/linkage.h> |
| 7 | #include <linux/sys.h> |
| 8 | #include <linux/cache.h> |
Al Viro | ecec5ba | 2007-05-15 20:36:00 +0100 | [diff] [blame] | 9 | #include <kern_constants.h> |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 10 | |
| 11 | #define __NO_STUBS |
| 12 | |
Jeff Dike | 95906b2 | 2008-02-04 22:31:20 -0800 | [diff] [blame] | 13 | /* |
| 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' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 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 | |
Jeff Dike | 95906b2 | 2008-02-04 22:31:20 -0800 | [diff] [blame] | 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 | */ |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 26 | |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 27 | /* On UML we call it this way ("old" means it's not mmap2) */ |
| 28 | #define sys_mmap old_mmap |
Jeff Dike | 95906b2 | 2008-02-04 22:31:20 -0800 | [diff] [blame] | 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 | */ |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 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) ; |
| 44 | #undef _ASM_X86_64_UNISTD_H_ |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 45 | #include <asm-x86/unistd_64.h> |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 46 | |
| 47 | #undef __SYSCALL |
| 48 | #define __SYSCALL(nr, sym) [ nr ] = sym, |
| 49 | #undef _ASM_X86_64_UNISTD_H_ |
| 50 | |
| 51 | typedef void (*sys_call_ptr_t)(void); |
| 52 | |
| 53 | extern void sys_ni_syscall(void); |
| 54 | |
Jeff Dike | f87ea91 | 2008-02-04 22:31:29 -0800 | [diff] [blame] | 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 = { |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 67 | #include <asm-x86/unistd_64.h> |
Paolo 'Blaisorblade' Giarrusso | 80f9507 | 2005-05-01 08:58:55 -0700 | [diff] [blame] | 68 | }; |
Jeff Dike | f87ea91 | 2008-02-04 22:31:29 -0800 | [diff] [blame] | 69 | |
| 70 | int syscall_table_size = sizeof(sys_call_table); |