gdb/testsuite/gdb.dwarf2/dw2-restore.S

   1 /*
   2    Copyright 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Compile with "gcc -nostdlib dw2-restore.S" */
  18
  19         .text
  20         .globl _start
  21         .func   _start
  22 _start: call foo
  23         mov $0,%rax
  24         ret
  25         .endfunc
  26
  27         .func   foo
  28 foo:    .cfi_startproc
  29         push %rbp
  30         .cfi_adjust_cfa_offset 8
  31         mov %rsp,%rbp
  32         .cfi_def_cfa_register %rbp
  33
  34         .cfi_remember_state
  35         jmp 2f
  36
  37 1:      mov %rbp,%rsp
  38         .cfi_restore %rbp
  39         pop %rbp
  40         .cfi_adjust_cfa_offset -8
  41         .cfi_def_cfa_register %rsp
  42         ret
  43
  44         .cfi_restore_state
  45 2:      movq $0,%rax
  46         movq $0,(%rax)  /* crash here */
  47         jmp 1b
  48         .cfi_endproc
  49         .endfunc
  50         .section        .note.GNU-stack,"",@progbits