1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c 4 * with some changes for UML. 5 */ 6 7 #include <linux/linkage.h> 8 #include <linux/sys.h> 9 #include <linux/cache.h> 10 #include <asm/unistd.h> 11 #include <asm/syscall.h> 12 13 #define __NO_STUBS 14 15 /* 16 * Below you can see, in terms of #define's, the differences between the x86-64 17 * and the UML syscall table. 18 */ 19 20 /* Not going to be implemented by UML, since we have no hardware. */ 21 #define sys_iopl sys_ni_syscall 22 #define sys_ioperm sys_ni_syscall 23 24 /* 25 * The UML TLS problem. Note that x86_64 does not implement this, so the below 26 * is needed only for the ia32 compatibility. 27 */ 28 29 /* On UML we call it this way ("old" means it's not mmap2) */ 30 #define sys_mmap old_mmap 31 32 #define stub_clone sys_clone 33 #define stub_fork sys_fork 34 #define stub_vfork sys_vfork 35 #define stub_execve sys_execve 36 #define stub_execveat sys_execveat 37 #define stub_rt_sigreturn sys_rt_sigreturn 38 39 #define __SYSCALL_X32(nr, sym) 40 #define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym) 41 42 #define __SYSCALL_64(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ; 43 #include <asm/syscalls_64.h> 44 45 #undef __SYSCALL_64 46 #define __SYSCALL_64(nr, sym) [ nr ] = sym, 47 48 extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); 49 50 const 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 59 int syscall_table_size = sizeof(sys_call_table); 60