Commit c33a346e authored by bellard's avatar bellard
Browse files

first part of single stepping support


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@342 c046a42c-6fe2-441c-8c8c-71466251a162
parent 61a2ad53
......@@ -315,6 +315,7 @@ void cpu_interrupt(CPUState *s, int mask);
int cpu_breakpoint_insert(CPUState *env, uint32_t pc);
int cpu_breakpoint_remove(CPUState *env, uint32_t pc);
void cpu_single_step(CPUState *env, int enabled);
/* gdb stub API */
extern int gdbstub_fd;
......
......@@ -617,7 +617,8 @@ static void tb_reset_jump_recursive(TranslationBlock *tb)
tb_reset_jump_recursive2(tb, 1);
}
/* add a breakpoint */
/* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a
breakpoint is reached */
int cpu_breakpoint_insert(CPUState *env, uint32_t pc)
{
#if defined(TARGET_I386)
......@@ -659,6 +660,20 @@ int cpu_breakpoint_remove(CPUState *env, uint32_t pc)
#endif
}
/* enable or disable single step mode. EXCP_DEBUG is returned by the
CPU loop after each instruction */
void cpu_single_step(CPUState *env, int enabled)
{
#if defined(TARGET_I386)
if (env->singlestep_enabled != enabled) {
env->singlestep_enabled = enabled;
/* must flush all the translated code to avoid inconsistancies */
tb_flush();
}
#endif
}
/* mask must never be zero */
void cpu_interrupt(CPUState *env, int mask)
{
......
......@@ -324,6 +324,24 @@ int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port)
snprintf(buf, sizeof(buf), "S%02x", ret);
put_packet(buf);
break;
case 's':
env = cpu_gdbstub_get_env(opaque);
if (*p != '\0') {
addr = strtoul(p, (char **)&p, 16);
#if defined(TARGET_I386)
env->eip = addr;
#endif
}
cpu_single_step(env, 1);
ret = main_loop(opaque);
cpu_single_step(env, 0);
if (ret == EXCP_DEBUG)
ret = SIGTRAP;
else
ret = 0;
snprintf(buf, sizeof(buf), "S%02x", ret);
put_packet(buf);
break;
case 'g':
env = cpu_gdbstub_get_env(opaque);
registers = (void *)mem_buf;
......
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