gdb/testsuite/gdb.arch/i386-prologue.c

   1 /* Unwinder test program.
   2
   3    Copyright (C) 2003-2022 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 #ifdef SYMBOL_PREFIX
  21 #define SYMBOL(str)     SYMBOL_PREFIX #str
  22 #else
  23 #define SYMBOL(str)     #str
  24 #endif
  25
  26 void gdb1253 (void);
  27 void gdb1718 (void);
  28 void gdb1338 (void);
  29 void jump_at_beginning (void);
  30 void standard (void);
  31 void stack_align_ecx (void);
  32 void stack_align_edx (void);
  33 void stack_align_eax (void);
  34
  35 int
  36 main (void)
  37 {
  38   standard ();
  39   stack_align_ecx ();
  40   stack_align_edx ();
  41   stack_align_eax ();
  42   gdb1253 ();
  43   gdb1718 ();
  44   gdb1338 ();
  45   jump_at_beginning ();
  46   return 0;
  47 }
  48
  49 /* A normal prologue.  */
  50
  51 asm(".text\n"
  52     "    .align 8\n"
  53     SYMBOL (standard) ":\n"
  54     "    pushl %ebp\n"
  55     "    movl  %esp, %ebp\n"
  56     "    pushl %edi\n"
  57     "    int   $0x03\n"
  58     "    leave\n"
  59     "    ret\n");
  60
  61 /* Relevant part of the prologue from symtab/1253.  */
  62
  63 asm(".text\n"
  64     "    .align 8\n"
  65     SYMBOL (gdb1253) ":\n"
  66     "    pushl %ebp\n"
  67     "    xorl  %ecx, %ecx\n"
  68     "    movl  %esp, %ebp\n"
  69     "    pushl %edi\n"
  70     "    int   $0x03\n"
  71     "    leave\n"
  72     "    ret\n");
  73
  74 /* Relevant part of the prologue from backtrace/1718.  */
  75
  76 asm(".text\n"
  77     "    .align 8\n"
  78     SYMBOL (gdb1718) ":\n"
  79     "    pushl %ebp\n"
  80     "    movl  $0x11111111, %eax\n"
  81     "    movl  %esp, %ebp\n"
  82     "    pushl %esi\n"
  83     "    movl  $0x22222222, %esi\n"
  84     "    pushl %ebx\n"
  85     "    int   $0x03\n"
  86     "    leave\n"
  87     "    ret\n");
  88
  89 /* Relevant part of the prologue from backtrace/1338.  */
  90
  91 asm(".text\n"
  92     "    .align 8\n"
  93     SYMBOL (gdb1338) ":\n"
  94     "    pushl %edi\n"
  95     "    pushl %esi\n"
  96     "    pushl %ebx\n"
  97     "    int   $0x03\n"
  98     "    popl  %ebx\n"
  99     "    popl  %esi\n"
 100     "    popl  %edi\n"
 101     "    ret\n");
 102
 103 /* The purpose of this function is to verify that, during prologue
 104    skip, GDB does not follow a jump at the beginnning of the "real"
 105    code.  */
 106
 107 asm(".text\n"
 108     "    .align 8\n"
 109     SYMBOL (jump_at_beginning) ":\n"
 110     "    pushl %ebp\n"
 111     "    movl  %esp,%ebp\n"
 112     "    jmp   .gdbjump\n"
 113     "    nop\n"
 114     ".gdbjump:\n"
 115     "    movl  %ebp,%esp\n"
 116     "    popl  %ebp\n"
 117     "    ret\n");
 118
 119 asm(".text\n"
 120     "    .align 8\n"
 121     SYMBOL (stack_align_ecx) ":\n"
 122     "    leal  4(%esp), %ecx\n"
 123     "    andl  $-16, %esp\n"
 124     "    pushl -4(%ecx)\n"
 125     "    pushl %ebp\n"
 126     "    movl  %esp, %ebp\n"
 127     "    pushl %edi\n"
 128     "    pushl %ecx\n"
 129     "    int   $0x03\n"
 130     "    popl  %ecx\n"
 131     "    popl  %edi\n"
 132     "    popl  %ebp\n"
 133     "    leal  -4(%ecx), %esp\n"
 134     "    ret\n");
 135
 136 asm(".text\n"
 137     "    .align 8\n"
 138     SYMBOL (stack_align_edx) ":\n"
 139     "    leal  4(%esp), %edx\n"
 140     "    andl  $-16, %esp\n"
 141     "    pushl -4(%edx)\n"
 142     "    pushl %ebp\n"
 143     "    movl  %esp, %ebp\n"
 144     "    pushl %edi\n"
 145     "    pushl %ecx\n"
 146     "    int   $0x03\n"
 147     "    popl  %ecx\n"
 148     "    popl  %edi\n"
 149     "    popl  %ebp\n"
 150     "    leal  -4(%edx), %esp\n"
 151     "    ret\n");
 152
 153 asm(".text\n"
 154     "    .align 8\n"
 155     SYMBOL (stack_align_eax) ":\n"
 156     "    leal  4(%esp), %eax\n"
 157     "    andl  $-16, %esp\n"
 158     "    pushl -4(%eax)\n"
 159     "    pushl %ebp\n"
 160     "    movl  %esp, %ebp\n"
 161     "    pushl %edi\n"
 162     "    pushl %ecx\n"
 163     "    int   $0x03\n"
 164     "    popl  %ecx\n"
 165     "    popl  %edi\n"
 166     "    popl  %ebp\n"
 167     "    leal  -4(%eax), %esp\n"
 168     "    ret\n");
 169