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

   1 /* Symbol size test program.
   2
   3    Copyright 2006-2020 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
  27 trap (void)
  28 {
  29   asm ("int $0x03");
  30 }
  31
  32 /* Jump from a function with its symbol size set, to a function
  33    named by a local label.  If GDB does not look at the sizes of
  34    symbols, we will still appear to be in the first function.  */
  35
  36 asm(".text\n"
  37     "    .align 8\n"
  38     "    .globl " SYMBOL (main) "\n"
  39     SYMBOL (main) ":\n"
  40     "    pushl %ebp\n"
  41     "    mov   %esp, %ebp\n"
  42     "    call  .Lfunc\n"
  43     "    ret\n"
  44     "    .size " SYMBOL (main) ", .-" SYMBOL (main) "\n"
  45     ".Lfunc:\n"
  46     "    pushl %ebp\n"
  47     "    mov   %esp, %ebp\n"
  48     "    call  " SYMBOL (trap) "\n");