/* Test program for byte registers. Copyright 2010-2014 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include int data[] = { 0x14131211, 0x24232221, 0x34333231, 0x44434241, }; int main (int argc, char **argv) { register int eax asm ("eax"); register int ebx asm ("ebx"); register int ecx asm ("ecx"); register int edx asm ("edx"); asm ("mov 0(%0), %%eax\n\t" "mov 4(%0), %%ebx\n\t" "mov 8(%0), %%ecx\n\t" "mov 12(%0), %%edx\n\t" : /* no output operands */ : "r" (data) : "eax", "ebx", "ecx", "edx"); asm ("nop" /* first breakpoint here */ /* i386-{byte,word}.exp write eax-edx here. Tell gcc/clang they're live. */ : "=r" (eax), "=r" (ebx), "=r" (ecx), "=r" (edx) : /* no inputs */); asm ("mov %%eax, 0(%0)\n\t" "mov %%ebx, 4(%0)\n\t" "mov %%ecx, 8(%0)\n\t" "mov %%edx, 12(%0)\n\t" : /* no output operands */ : "r" (data), /* Mark these as inputs so that gcc/clang won't try to use them as a temp to build %0. */ "r" (eax), "r" (ebx), "r" (ecx), "r" (edx)); puts ("Bye!"); /* second breakpoint here */ return 0; }