1 /* Unwinder test program for signal frames. 2 3 Copyright 2007-2016 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 void sigframe (void); 21 void setup (void); 22 23 void 24 func (void) 25 { 26 } 27 28 int 29 main (void) 30 { 31 setup (); 32 } 33 34 /* Create an imitation signal frame. This will work on any x86 or 35 x86-64 target which uses a version of GAS recent enough for 36 .cfi_signal_frame (added 2006-02-27 and included in binutils 2.17). 37 The default CIE created by gas suffices to unwind from an empty 38 function. */ 39 40 /* Note: to make sure that the Dwarf unwinder gets to handle 41 the frame, we add an extra 'nop' after the label. Otherwise, 42 the epilogue unwinder will see the 'ret' and grab the frame. */ 43 44 asm(".text\n" 45 " .align 8\n" 46 " .globl setup\n" 47 "setup:\n" 48 " push $sigframe\n" 49 " jmp func\n" 50 "\n" 51 " .cfi_startproc\n" 52 " .cfi_signal_frame\n" 53 " nop\n" 54 " .globl sigframe\n" 55 "sigframe:\n" 56 " nop\n" 57 " ret\n" 58 " .cfi_endproc"); 59