80 lines
1 KiB
C
80 lines
1 KiB
C
|
#include <merror.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <melf.h>
|
||
|
|
|
||
|
|
#include "sim.h"
|
||
|
|
|
||
|
|
static uint32_t read_num() {
|
||
|
|
int i = 0;
|
||
|
|
while (1) {
|
||
|
|
int c = getc(stdin);
|
||
|
|
if (c < '0' || c > '9') {
|
||
|
|
ungetc(c, stdin);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i *= 10;
|
||
|
|
i += c - '0';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i)
|
||
|
|
return i;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
_Noreturn void sim_debug(struct simulator *sim) {
|
||
|
|
|
||
|
|
int c;
|
||
|
|
sim->pc = sim->entry;
|
||
|
|
sim->current_pc = sim->pc;
|
||
|
|
|
||
|
|
prompt:
|
||
|
|
printf(">> ");
|
||
|
|
fflush(stdout);
|
||
|
|
next:
|
||
|
|
switch ((c = getchar())) {
|
||
|
|
|
||
|
|
/* skip whitespace */
|
||
|
|
case ' ':
|
||
|
|
case '\t':
|
||
|
|
goto next;
|
||
|
|
|
||
|
|
/* ignore nl */
|
||
|
|
case '\n':
|
||
|
|
goto prompt;
|
||
|
|
|
||
|
|
/* exit on eof */
|
||
|
|
case EOF:
|
||
|
|
exit(0);
|
||
|
|
break;
|
||
|
|
|
||
|
|
/* dump registers */
|
||
|
|
case 'r':
|
||
|
|
sim_dump_reg(sim);
|
||
|
|
break;
|
||
|
|
|
||
|
|
/* step ins */
|
||
|
|
case 's': {
|
||
|
|
for (uint32_t i = read_num(); i > 0; i--)
|
||
|
|
sim_step(sim);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* print curr ins */
|
||
|
|
case 'i':
|
||
|
|
printf("0x%08x\n", B32(* (uint32_t *) (uintptr_t) sim->pc));
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'a':
|
||
|
|
printf("0x%08x\n", sim->pc);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
ERROR("unknown command '%c'", c);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
goto next;
|
||
|
|
}
|