arch/x86/entry/syscall_x32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* System call table for x32 ABI. */
   3
   4 #include <linux/linkage.h>
   5 #include <linux/sys.h>
   6 #include <linux/cache.h>
   7 #include <linux/syscalls.h>
   8 #include <asm/unistd.h>
   9 #include <asm/syscall.h>
  10
  11 /*
  12  * Reuse the 64-bit entry points for the x32 versions that occupy different
  13  * slots in the syscall table.
  14  */
  15 #define __x32_sys_readv         __x64_sys_readv
  16 #define __x32_sys_writev        __x64_sys_writev
  17 #define __x32_sys_getsockopt    __x64_sys_getsockopt
  18 #define __x32_sys_setsockopt    __x64_sys_setsockopt
  19 #define __x32_sys_vmsplice      __x64_sys_vmsplice
  20 #define __x32_sys_process_vm_readv      __x64_sys_process_vm_readv
  21 #define __x32_sys_process_vm_writev     __x64_sys_process_vm_writev
  22
  23 #define __SYSCALL_64(nr, sym)
  24
  25 #define __SYSCALL_X32(nr, sym) extern long __x32_##sym(const struct pt_regs *);
  26 #define __SYSCALL_COMMON(nr, sym) extern long __x64_##sym(const struct pt_regs *);
  27 #include <asm/syscalls_64.h>
  28 #undef __SYSCALL_X32
  29 #undef __SYSCALL_COMMON
  30
  31 #define __SYSCALL_X32(nr, sym) [nr] = __x32_##sym,
  32 #define __SYSCALL_COMMON(nr, sym) [nr] = __x64_##sym,
  33
  34 asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = {
  35         /*
  36          * Smells like a compiler bug -- it doesn't work
  37          * when the & below is removed.
  38          */
  39         [0 ... __NR_x32_syscall_max] = &__x64_sys_ni_syscall,
  40 #include <asm/syscalls_64.h>
  41 };