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target-i386: Introduce cpu_x86_update_dr7

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This moves the last of the iteration over breakpoints into
the bpt_helper.c file. This also allows us to make several
breakpoint functions static.

Backports commit 93d00d0fbe4711061834730fb70525d167b6f908 from qemu
This commit is contained in:
Richard Henderson 2018-02-16 16:05:51 -05:00 committed by Lioncash
parent c5c44f3a8a
commit 0ad95f8341
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 21 additions and 21 deletions
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30
qemu/target-i386/bpt_helper.c
View file

@ -20,8 +20,8 @@
#include "cpu.h"
#include "exec/helper-proto.h"
void hw_breakpoint_insert(CPUX86State *env, int index)
#ifndef CONFIG_USER_ONLY
static void hw_breakpoint_insert(CPUX86State *env, int index)
{
CPUState *cs = CPU(x86_env_get_cpu(env));
int type = 0, err = 0;
@ -55,7 +55,7 @@ void hw_breakpoint_insert(CPUX86State *env, int index)
}
}
void hw_breakpoint_remove(CPUX86State *env, int index)
static void hw_breakpoint_remove(CPUX86State *env, int index)
{
CPUState *cs;
@ -79,6 +79,20 @@ void hw_breakpoint_remove(CPUX86State *env, int index)
}
}
void cpu_x86_update_dr7(CPUX86State *env, uint32_t new_dr7)
{
int i;
for (i = 0; i < DR7_MAX_BP; i++) {
hw_breakpoint_remove(env, i);
}
env->dr[7] = new_dr7;
for (i = 0; i < DR7_MAX_BP; i++) {
hw_breakpoint_insert(env, i);
}
}
#endif
static bool check_hw_breakpoints(CPUX86State *env, bool force_dr6_update)
{
target_ulong dr6;
@ -161,20 +175,12 @@ void helper_single_step(CPUX86State *env)
void helper_movl_drN_T0(CPUX86State *env, int reg, target_ulong t0)
{
#ifndef CONFIG_USER_ONLY
int i;
if (reg < 4) {
hw_breakpoint_remove(env, reg);
env->dr[reg] = t0;
hw_breakpoint_insert(env, reg);
} else if (reg == 7) {
for (i = 0; i < DR7_MAX_BP; i++) {
hw_breakpoint_remove(env, i);
}
env->dr[7] = t0;
for (i = 0; i < DR7_MAX_BP; i++) {
hw_breakpoint_insert(env, i);
}
cpu_x86_update_dr7(env, t0);
} else {
env->dr[reg] = t0;
}

4
qemu/target-i386/cpu.h
View file

@ -236,6 +236,7 @@
#define DR7_TYPE_SHIFT 16
#define DR7_LEN_SHIFT 18
#define DR7_FIXED_1 0x00000400
#define DR7_GLOBAL_BP_MASK 0xaa
#define DR7_LOCAL_BP_MASK 0x55
#define DR7_MAX_BP 4
#define DR7_TYPE_BP_INST 0x0
@ -1157,14 +1158,13 @@ static inline int hw_breakpoint_len(unsigned long dr7, int index)
return (len == 2) ? 8 : len + 1;
}
void hw_breakpoint_insert(CPUX86State *env, int index);
void hw_breakpoint_remove(CPUX86State *env, int index);
void breakpoint_handler(CPUState *cs);
/* will be suppressed */
void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3);
void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4);
void cpu_x86_update_dr7(CPUX86State *env, uint32_t new_dr7);
/* hw/pc.c */
void cpu_smm_update(CPUX86State *env);

8
qemu/target-i386/seg_helper.c
View file

@ -488,13 +488,7 @@ static void switch_tss_ra(CPUX86State *env, int tss_selector,
#ifndef CONFIG_USER_ONLY
/* reset local breakpoints */
if (env->dr[7] & DR7_LOCAL_BP_MASK) {
for (i = 0; i < DR7_MAX_BP; i++) {
if (hw_local_breakpoint_enabled(env->dr[7], i) &&
!hw_global_breakpoint_enabled(env->dr[7], i)) {
hw_breakpoint_remove(env, i);
}
}
env->dr[7] &= ~DR7_LOCAL_BP_MASK;
cpu_x86_update_dr7(env, env->dr[7] & ~DR7_LOCAL_BP_MASK);
}
#endif
}