/* Unwinder test program for signal frames.
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/* Unwinder test program for signal frames.
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Copyright 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Copyright 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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void sigframe (void);
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void sigframe (void);
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void setup (void);
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void setup (void);
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void
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void
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func (void)
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func (void)
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{
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{
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}
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}
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int
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int
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main (void)
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main (void)
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{
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{
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setup ();
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setup ();
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}
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}
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/* Create an imitation signal frame. This will work on any x86 or
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/* Create an imitation signal frame. This will work on any x86 or
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x86-64 target which uses a version of GAS recent enough for
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x86-64 target which uses a version of GAS recent enough for
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.cfi_signal_frame (added 2006-02-27 and included in binutils 2.17).
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.cfi_signal_frame (added 2006-02-27 and included in binutils 2.17).
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The default CIE created by gas suffices to unwind from an empty
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The default CIE created by gas suffices to unwind from an empty
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function. */
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function. */
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/* Note: to make sure that the Dwarf unwinder gets to handle
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/* Note: to make sure that the Dwarf unwinder gets to handle
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the frame, we add an extra 'nop' after the label. Otherwise,
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the frame, we add an extra 'nop' after the label. Otherwise,
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the epilogue unwinder will see the 'ret' and grab the frame. */
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the epilogue unwinder will see the 'ret' and grab the frame. */
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asm(".text\n"
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asm(".text\n"
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" .align 8\n"
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" .align 8\n"
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" .globl setup\n"
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" .globl setup\n"
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"setup:\n"
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"setup:\n"
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" push $sigframe\n"
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" push $sigframe\n"
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" jmp func\n"
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" jmp func\n"
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"\n"
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"\n"
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" .cfi_startproc\n"
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" .cfi_startproc\n"
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" .cfi_signal_frame\n"
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" .cfi_signal_frame\n"
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" nop\n"
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" nop\n"
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" .globl sigframe\n"
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" .globl sigframe\n"
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"sigframe:\n"
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"sigframe:\n"
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" nop\n"
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" nop\n"
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" ret\n"
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" ret\n"
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" .cfi_endproc");
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" .cfi_endproc");
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