gdb/testsuite/gdb.arch/amd64-pseudo.c

/* Test program for byte registers.

   Copyright 2010-2021 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 <http://www.gnu.org/licenses/>.  */

#include <stdio.h>

int data[] = {
  0x14131211,
  0x24232221,
  0x34333231,
  0x44434241,
  0x54535251,
  0x64636261,
  0x74737271,
  0x84838281,
  0x94939291,
  0xa4a3a2a1,
  0xb4b3b2b1,
  0xc4c3c2c1,
  0xd4d3d2d1,
  0xe4e3e2e1,
};

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");
  register int esi asm ("esi");
  register int edi asm ("edi");
  register long r8 asm ("r8");
  register long r9 asm ("r9");
  register long r10 asm ("r10");
  register long r11 asm ("r11");
  register long r12 asm ("r12");
  register long r13 asm ("r13");
  register long r14 asm ("r14");
  register long r15 asm ("r15");

  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"
       "mov 16(%0), %%esi\n\t"
       "mov 20(%0), %%edi\n\t"
       : /* no output operands */
       : "r" (data) 
       : "eax", "ebx", "ecx", "edx", "esi", "edi");
  asm ("nop"); /* first breakpoint here */

  asm ("mov 24(%0), %%r8d\n\t"
       "mov 28(%0), %%r9d\n\t"
       "mov 32(%0), %%r10d\n\t"
       "mov 36(%0), %%r11\n\t"
       "mov 40(%0), %%r12d\n\t"
       "mov 44(%0), %%r13d\n\t"
       "mov 48(%0), %%r14d\n\t"
       "mov 52(%0), %%r15d\n\t"
       : /* no output operands */
       : "r" (data) 
       : "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15");

  asm ("nop" /* second breakpoint here */
       /* amd64-{byte,word,dword}.exp write eax-edi here.
	  Tell gcc/clang they're live.  */
       : "=r" (eax), "=r" (ebx), "=r" (ecx),
	 "=r" (edx), "=r" (esi), "=r" (edi)
       : /* 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"
       "mov %%esi, 16(%0)\n\t"
       "mov %%edi, 20(%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), "r" (esi), "r" (edi));

  asm ("nop" /* third breakpoint here */
       /* amd64-{byte,word,dword}.exp write r8-r15 here.
	  Tell gcc/clang they're live.  */
       : "=r" (r8), "=r" (r9), "=r" (r10), "=r" (r11),
	 "=r" (r12), "=r" (r13), "=r" (r14), "=r" (r15)
       : /* no inputs */);

  asm ("mov %%r8d, 24(%0)\n\t"
       "mov %%r9d, 28(%0)\n\t"
       "mov %%r10d, 32(%0)\n\t"
       "mov %%r11d, 36(%0)\n\t"
       "mov %%r12d, 40(%0)\n\t"
       "mov %%r13d, 44(%0)\n\t"
       "mov %%r14d, 48(%0)\n\t"
       "mov %%r15d, 52(%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" (r8), "r" (r9), "r" (r10), "r" (r11),
	 "r" (r12), "r" (r13), "r" (r14), "r" (r15));
  puts ("Bye!"); /* fourth breakpoint here */

  return 0;
}