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DR6 single step exception status bit, by Juergen Keil. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3024 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-06-26 08:35:18 +00:00
parent b3ceef24f4
commit 88fe8a41f2
4 changed files with 13 additions and 1 deletions
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1
target-i386/exec.h
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@ -190,6 +190,7 @@ void helper_divq_EAX_T0(void);
void helper_idivq_EAX_T0(void); void helper_idivq_EAX_T0(void);
void helper_bswapq_T0(void); void helper_bswapq_T0(void);
void helper_cmpxchg8b(void); void helper_cmpxchg8b(void);
void helper_single_step(void);
void helper_cpuid(void); void helper_cpuid(void);
void helper_enter_level(int level, int data32); void helper_enter_level(int level, int data32);
void helper_enter64_level(int level, int data64); void helper_enter64_level(int level, int data64);

6
target-i386/helper.c
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@ -1622,6 +1622,12 @@ void helper_cmpxchg8b(void)
CC_SRC = eflags; CC_SRC = eflags;
} }
void helper_single_step()
{
env->dr[6] |= 0x4000;
raise_exception(EXCP01_SSTP);
}
void helper_cpuid(void) void helper_cpuid(void)
{ {
uint32_t index; uint32_t index;

5
target-i386/op.c
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@ -730,6 +730,11 @@ void OPPROTO op_cmpxchg8b(void)
helper_cmpxchg8b(); helper_cmpxchg8b();
} }
void OPPROTO op_single_step(void)
{
helper_single_step();
}
void OPPROTO op_movl_T0_0(void) void OPPROTO op_movl_T0_0(void)
{ {
T0 = 0; T0 = 0;

2
target-i386/translate.c
View File

@ -2277,7 +2277,7 @@ static void gen_eob(DisasContext *s)
if (s->singlestep_enabled) { if (s->singlestep_enabled) {
gen_op_debug(); gen_op_debug();
} else if (s->tf) { } else if (s->tf) {
gen_op_raise_exception(EXCP01_SSTP); gen_op_single_step();
} else { } else {
gen_op_movl_T0_0(); gen_op_movl_T0_0();
gen_op_exit_tb(); gen_op_exit_tb();