gdb/testsuite/lib/my-syscalls.S

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2020-2023 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18
  19 /* This file implements simple Linux syscall wrappers, to be used by tests that
  20    need to know exactly where the syscall instructions are.  */
  21
  22 #include <asm/unistd.h>
  23
  24 /* int my_execve (const char *file, char *argv[], char *envp[]);  */
  25
  26 .global my_execve
  27 my_execve:
  28
  29 #if defined(__x86_64__)
  30
  31         mov $__NR_execve, %rax
  32         /* rdi, rsi and rdx already contain the right arguments.  */
  33 my_execve_syscall:
  34         syscall
  35         ret
  36
  37 #elif defined(__i386__)
  38
  39         mov $__NR_execve, %eax
  40         mov 4(%esp), %ebx
  41         mov 8(%esp), %ecx
  42         mov 12(%esp), %edx
  43 my_execve_syscall:
  44         int $0x80
  45         ret
  46
  47 #elif defined(__aarch64__)
  48
  49         mov x8, #__NR_execve
  50         /* x0, x1 and x2 already contain the right arguments.  */
  51 my_execve_syscall:
  52         svc #0
  53
  54 #else
  55 # error "Unsupported architecture"
  56 #endif
  57
  58         .section        .note.GNU-stack,"",@progbits