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 45 typedef void (*sys_call_ptr_t)(void); 46 47 extern void sys_ni_syscall(void); 48 49 const 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 58 int syscall_table_size = sizeof(sys_call_table); 59