gdb/testsuite/gdb.arch/powerpc-prologue.c

   1 /* Unwinder test program.
   2
   3    Copyright 2006, 2007 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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifdef SYMBOL_PREFIX
  23 #define SYMBOL(str)     SYMBOL_PREFIX #str
  24 #else
  25 #define SYMBOL(str)     #str
  26 #endif
  27
  28 void gdb2029 (void);
  29
  30 int
  31 main (void)
  32 {
  33   gdb2029 ();
  34   return 0;
  35 }
  36
  37 /* A typical PIC prologue from GCC.  */
  38
  39 asm(".text\n"
  40     "    .align 8\n"
  41     SYMBOL (gdb2029) ":\n"
  42     "   stw     %r1, -32(%r1)\n"
  43     "   mflr    %r0\n"
  44     "   bcl-    20,31,.+4\n"
  45     "   stw     %r30, 24(%r1)\n"
  46     "   mflr    %r30\n"
  47     "   stw     %r0, 36(%r1)\n"
  48     "   twge    %r2, %r2\n"
  49     "   lwz     %r0, 36(%r1)\n"
  50     "   lwz     %r30, 24(%r1)\n"
  51     "   mtlr    %r0\n"
  52     "   addi    %r0, %r0, 32\n"
  53     "   blr");