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 sys_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_execveat sys_execveat 35#define stub_rt_sigreturn sys_rt_sigreturn 36 37#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat) 38#define __SYSCALL_X32(nr, sym, compat) /* Not supported */ 39 40#define __SYSCALL_64(nr, sym, compat) extern asmlinkage void sym(void) ; 41#include <asm/syscalls_64.h> 42 43#undef __SYSCALL_64 44#define __SYSCALL_64(nr, sym, compat) [ nr ] = sym, 45 46typedef void (*sys_call_ptr_t)(void); 47 48extern void sys_ni_syscall(void); 49 50const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = { 51 /* 52 * Smells like a compiler bug -- it doesn't work 53 * when the & below is removed. 54 */ 55 [0 ... __NR_syscall_max] = &sys_ni_syscall, 56#include <asm/syscalls_64.h> 57}; 58 59int syscall_table_size = sizeof(sys_call_table); 60