gnu/dist/gdb6/gdb/testsuite/gdb.arch/i386-prologue.c

   1 /* Unwinder test program.
   2
   3    Copyright (C) 2003, 2004, 2006 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 gdb1253 (void);
  29 void gdb1718 (void);
  30 void gdb1338 (void);
  31 void jump_at_beginning (void);
  32
  33 int
  34 main (void)
  35 {
  36   standard ();
  37   stack_align ();
  38   gdb1253 ();
  39   gdb1718 ();
  40   gdb1338 ();
  41   jump_at_beginning ();
  42   return 0;
  43 }
  44
  45 /* A normal prologue.  */
  46
  47 asm(".text\n"
  48     "    .align 8\n"
  49     SYMBOL (standard) ":\n"
  50     "    pushl %ebp\n"
  51     "    movl  %esp, %ebp\n"
  52     "    pushl %edi\n"
  53     "    int   $0x03\n"
  54     "    leave\n"
  55     "    ret\n");
  56
  57 /* Relevant part of the prologue from symtab/1253.  */
  58
  59 asm(".text\n"
  60     "    .align 8\n"
  61     SYMBOL (gdb1253) ":\n"
  62     "    pushl %ebp\n"
  63     "    xorl  %ecx, %ecx\n"
  64     "    movl  %esp, %ebp\n"
  65     "    pushl %edi\n"
  66     "    int   $0x03\n"
  67     "    leave\n"
  68     "    ret\n");
  69
  70 /* Relevant part of the prologue from backtrace/1718.  */
  71
  72 asm(".text\n"
  73     "    .align 8\n"
  74     SYMBOL (gdb1718) ":\n"
  75     "    pushl %ebp\n"
  76     "    movl  $0x11111111, %eax\n"
  77     "    movl  %esp, %ebp\n"
  78     "    pushl %esi\n"
  79     "    movl  $0x22222222, %esi\n"
  80     "    pushl %ebx\n"
  81     "    int   $0x03\n"
  82     "    leave\n"
  83     "    ret\n");
  84
  85 /* Relevant part of the prologue from backtrace/1338.  */
  86
  87 asm(".text\n"
  88     "    .align 8\n"
  89     SYMBOL (gdb1338) ":\n"
  90     "    pushl %edi\n"
  91     "    pushl %esi\n"
  92     "    pushl %ebx\n"
  93     "    int   $0x03\n"
  94     "    popl  %ebx\n"
  95     "    popl  %esi\n"
  96     "    popl  %edi\n"
  97     "    ret\n");
  98
  99 /* The purpose of this function is to verify that, during prologue
 100    skip, GDB does not follow a jump at the beginnning of the "real"
 101    code.  */
 102
 103 asm(".text\n"
 104     "    .align 8\n"
 105     SYMBOL (jump_at_beginning) ":\n"
 106     "    pushl %ebp\n"
 107     "    movl  %esp,%ebp\n"
 108     "    jmp   .gdbjump\n"
 109     "    nop\n"
 110     ".gdbjump:\n"
 111     "    movl  %ebp,%esp\n"
 112     "    popl  %ebp\n"
 113     "    ret\n");
 114
 115 asm(".text\n"
 116     "    .align 8\n"
 117     SYMBOL (stack_align) ":\n"
 118     "    leal  4(%esp), %ecx\n"
 119     "    andl  $-16, %esp\n"
 120     "    pushl -4(%ecx)\n"
 121     "    pushl %ebp\n"
 122     "    movl  %esp, %ebp\n"
 123     "    pushl %edi\n"
 124     "    pushl %ecx\n"
 125     "    int   $0x03\n"
 126     "    popl  %ecx\n"
 127     "    popl  %edi\n"
 128     "    popl  %ebp\n"
 129     "    leal  -4(%ecx), %esp\n"
 130     "    ret\n");