/* Simulate how the CPU works. */
void cpu_exec(volatile uint32_t n) {
if(nemu_state == END) {
printf("Program execution has ended. To restart the program, exit NEMU and run again.\n");
return;
}
nemu_state = RUNNING;
#ifdef DEBUG
volatile uint32_t n_temp = n;
#endif
setjmp(jbuf);
for(; n > 0; n --) {
#ifdef DEBUG
swaddr_t eip_temp = cpu.eip;
if((n & 0xffff) == 0) {
/* Output some dots while executing the program. */
fputc('.', stderr);
}
#endif
/* Execute one instruction, including instruction fetch,
* instruction decode, and the actual execution. */
int instr_len = exec(cpu.eip);
cpu.eip += instr_len;
#ifdef DEBUG
print_bin_instr(eip_temp, instr_len);
strcat(asm_buf, assembly);
Log_write("%s\n", asm_buf);
if(n_temp < MAX_INSTR_TO_PRINT) {
printf("%s\n", asm_buf);
}
#endif
/* TODO: check watchpoints here. */
WP *tail=getHead();
uint32_t result;
bool f;
while(tail){
result=expr(tail->expr,&f);
if(f==false) return;
if(result!=tail->result){
nemu_state=STOP;
printf("监视点%d: %s\n",tail->NO,tail->expr);
printf("原值 result=%d\n",tail->result);
printf("新值 result=%d\n",result);
tail->result=result;
}
tail=tail->next;
}
if(nemu_state != RUNNING) { return; }
}
if(nemu_state == RUNNING) { nemu_state = STOP; }
}
/* Simulate how the CPU works. */
void cpu_exec(volatile uint32_t n) {
if(nemu_state == END) {
printf("Program execution has ended. To restart the program, exit NEMU and run again.\n");
return;
}
nemu_state = RUNNING;
#ifdef DEBUG
volatile uint32_t n_temp = n;
#endif
setjmp(jbuf);
for(; n > 0; n --) {
#ifdef DEBUG
swaddr_t eip_temp = cpu.eip;
if((n & 0xffff) == 0) {
/* Output some dots while executing the program. */
fputc('.', stderr);
}
#endif
/* Execute one instruction, including instruction fetch,
* instruction decode, and the actual execution. */
int instr_len = exec(cpu.eip);
// if (cpu.eip>=0xc0100740 && cpu.eip <=0xc0100744) printf("%08x %d\n", cpu.eip, instr_len);
cpu.eip += instr_len;
// if (cpu.eip>=0xc0100740 && cpu.eip <=0xc0100744) printf("%08x %d\n", cpu.eip, instr_len);
#ifdef DEBUG
print_bin_instr(eip_temp, instr_len);
strcat(asm_buf, assembly);
Log_write("%s\n", asm_buf);
if(n_temp < MAX_INSTR_TO_PRINT) {
printf("%s\n", asm_buf);
}
#endif
/* TODO: check watchpoints here. */
if (check()) {
nemu_state=STOP;
}
if(nemu_state != RUNNING) { return; }
if(cpu.INTR & eflags.IF) {
uint32_t intr_no = i8259_query_intr();
i8259_ack_intr();
int len;
len = get_len();
cpu.eip--;
raise_intr(intr_no, len);
}
}
if(nemu_state == RUNNING) { nemu_state = STOP; }
}
/* Simulate how the CPU works. */
void cpu_exec(volatile uint32_t n) {
if(nemu_state == END) {
printf("Program execution has ended. To restart the program, exit NEMU and run again.\n");
return;
}
nemu_state = RUNNING;
#ifdef DEBUG
volatile uint32_t n_temp = n;
#endif
setjmp(jbuf);
for(; n > 0; n --) {
#ifdef DEBUG
swaddr_t eip_temp = cpu.eip;
if((n & 0xffff) == 0) {
/* Output some dots while executing the program. */
fputc('.', stderr);
}
#endif
/* Execute one instruction, including instruction fetch,
* instruction decode, and the actual execution. */
int instr_len = exec(cpu.eip);
cpu.eip += instr_len;
#ifdef DEBUG
print_bin_instr(eip_temp, instr_len);
strcat(asm_buf, assembly);
Log_write("%s\n", asm_buf);
if(n_temp < MAX_INSTR_TO_PRINT) {
printf("%s\n", asm_buf);
}
#endif
if (check_change()) {
show_watchpoint();
break;
}
if(nemu_state != RUNNING) { return; }
}
if(nemu_state == RUNNING) { nemu_state = STOP; }
}
void cpu_exec(volatile uint32_t n) {
volatile uint32_t n_temp = n;
setjmp(jbuf);
for(; n > 0; n --) {
swaddr_t eip_temp = cpu.eip;
BP* current;
/*如果触发断点成功且eip-1恰好是int3指令*/
if(isBreak == true && swaddr_read(cpu.eip-1,1) == INT3_CODE)
{
cpu.eip--;
current = ret_head();//返回组织使用中断点的head指针
while(current -> addr != cpu.eip)//找存放相应内存地址的断点结构
current = current -> next;
swaddr_write(cpu.eip,1,current -> sav_istr);//临时恢复原来的指令
eip_temp--;
}
int instr_len = exec(cpu.eip);
/*刚执行完恢复的指令要马上设置回断点，使其能反复触发*/
if(isBreak == true && swaddr_read(eip_temp,1) != INT3_CODE)//刚触发断点但断点的位置刚被恢复为原指令
{
swaddr_write(eip_temp,1,INT3_CODE);
isBreak = false;//告别刚刚触发的那个断点，初始化isBreak，否则执行下一条正常指令也会进入这个判断
}
if(!isChange())
isBreak = true;
cpu.eip += instr_len;
if(n_temp != -1 || (enable_debug && !quiet)) {
print_bin_instr(eip_temp, instr_len);
puts(assembly);
}
if(nemu_state == INT) {
printf("\n\nUser interrupt\n");
return;
}
else if(isBreak == true) { return; }//如果因触发断点而停止，回到主循环等待下一条指令
else if(nemu_state == END) { return; }
}
}
void cpu_exec(volatile uint32_t n)
{
volatile uint32_t n_temp = n;
setjmp(jbuf);
for(; n > 0; n --) {
swaddr_t eip_temp = cpu.eip;
int f = 0;
int instr_len = exec(cpu.eip);
cpu.eip += instr_len;
if(f) {
printf("cpu.eip %x\n", cpu.eip);
f = 0;
}
if (n_temp != -1 || (enable_debug && !quiet)) {
print_bin_instr(eip_temp, instr_len);
puts(assembly);
}
int_polling();
switch(nemu_state) {
case INT:
printf("\n\nUser interrupt\n");
case END:
return;
case TEST_INT:
printf("---Stop to confirm, press `c' to continue---\n");
return;
}
}
}
/* Simulate how the CPU works. */
void cpu_exec(volatile uint32_t n) {
if(nemu_state == END) {
printf("Program execution has ended. To restart the program, exit NEMU and run again.\n");
return;
}
nemu_state = RUNNING;
#ifdef DEBUG
volatile uint32_t n_temp = n;
#endif
setjmp(jbuf);
for(; n > 0; n --) {
#ifdef DEBUG
swaddr_t eip_temp = cpu.eip;
if((n & 0xffff) == 0) {
/* Output some dots while executing the program. */
fputc('.', stderr);
}
#endif
/* Execute one instruction, including instruction fetch,
* instruction decode, and the actual execution. */
int instr_len = exec(cpu.eip);
cpu.eip += instr_len;
#ifdef DEBUG
print_bin_instr(eip_temp, instr_len);
strcat(asm_buf, assembly);
Log_write("%s\n", asm_buf);
if(n_temp < MAX_INSTR_TO_PRINT) {
printf("%s\n", asm_buf);
}
#endif
/* TODO: check watchpoints here. */
WP *p;
uint32_t index;
bool success=true;
p=gethead();
int flag=0;
while(p!=NULL)
{
index=expr(p->expr,&success);
if(success==false)
printf("Meet a wrong expression!");
if(p->ans!=index)
{
flag=1;
printf("watchpoint %d: %s\n",p->NO+1,p->expr);
printf("Old value = %d\n",p->ans);
printf("New value = %d\n",index);
p->ans=index;
}
p=p->next;
}
if(flag==1)
nemu_state=STOP;
if(nemu_state != RUNNING) { return; }
if(cpu.INTR & cpu.EFLAGS.IF) {
uint32_t intr_no = i8259_query_intr();
i8259_ack_intr();
raise_intr(intr_no);
}
}
if(nemu_state == RUNNING) { nemu_state = STOP; }
}
void cpu_exec(volatile uint32_t n) {
if(nemu_state == END) {
printf("Program execution has ended. To restart the program, exit NEMU and run again.\n");
return;
}
nemu_state = RUNNING;
#ifdef DEBUG
volatile uint32_t n_temp = n;
#endif
setjmp(jbuf);
for(; n > 0; n --) {
#ifdef DEBUG
swaddr_t eip_temp = cpu.eip;
if((n & 0xffff) == 0) {
/* Output some dots while executing the program. */
fputc('.', stderr);
}
#endif
/* Execute one instruction, including instruction fetch,
* instruction decode, and the actual execution. */
int instr_len = exec(cpu.eip);
//printf("instr_len is %x in cpu-exec.c\n",instr_len);
cpu.eip += instr_len;
si_count++;
#ifdef DEBUG
#endif
print_bin_instr(eip_temp, instr_len);
strcat(asm_buf, assembly);
Log_write("%s\n", asm_buf);
if(n_temp < MAX_INSTR_TO_PRINT) {
printf("%s\n", asm_buf);
}
/* TODO: check watchpoints here. */
if(check_watchpoints()){
n=1;
nemu_state = STOP;
}
if(nemu_state != RUNNING) {
printf("Cache cost = %llu, L1 miss rate = %f, L2 miss rate = %f\n",(unsigned long long)(L2_get_cache_cost()+L1_get_cache_cost()), (double)L1_cache_miss/(double)L1_cache_access,(double)L2_cache_miss/(double)L2_cache_access);
printf("Instruction executed: %llu\n",(long long unsigned)si_count);
return;
}
//printf("cpu.eip is %x in rear cpu-exec.c\n",cpu.eip);
//PA 4.4
if(cpu.INTR & eflags.eflags.IF) {
//printf("cpu.INTR triggered\n");
uint32_t intr_no = i8259_query_intr();
i8259_ack_intr();
int len = get_instr_len();
cpu.eip --; //TODO: ?!
raise_intr(intr_no, len);
}
}
if(nemu_state == RUNNING) { nemu_state = STOP; }
}