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/*
* i386 breakpoint helpers
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "helper-tcg.h"
void QEMU_NORETURN helper_single_step(CPUX86State *env)
{
#ifndef CONFIG_USER_ONLY
check_hw_breakpoints(env, true);
env->dr[6] |= DR6_BS;
#endif
raise_exception(env, EXCP01_DB);
}
void helper_rechecking_single_step(CPUX86State *env)
{
if ((env->eflags & TF_MASK) != 0) {
helper_single_step(env);
}
}
target_ulong helper_get_dr(CPUX86State *env, int reg)
{
switch (reg) {
case 0: case 1: case 2: case 3: case 6: case 7:
return env->dr[reg];
case 4:
if (env->cr[4] & CR4_DE_MASK) {
break;
} else {
return env->dr[6];
}
case 5:
if (env->cr[4] & CR4_DE_MASK) {
break;
} else {
return env->dr[7];
}
}
raise_exception_err_ra(env, EXCP06_ILLOP, 0, GETPC());
}
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