/* Returns PID */
R_API int r_debug_wait(RDebug *dbg) {
int ret = 0;
if (!dbg)
return R_FALSE;
dbg->reason.type = R_DEBUG_REASON_UNKNOWN;
if (r_debug_is_dead (dbg)) {
return dbg->reason.type = R_DEBUG_REASON_DEAD;
}
if (dbg->h && dbg->h->wait) {
dbg->reason.type = R_DEBUG_REASON_UNKNOWN;
ret = dbg->h->wait (dbg, dbg->pid);
dbg->newstate = 1;
if (ret == -1) {
eprintf ("\n==> Process finished\n\n");
r_debug_select (dbg, -1, -1);
}
//eprintf ("wait = %d\n", ret);
if (dbg->trace->enabled)
r_debug_trace_pc (dbg);
if (ret == R_DEBUG_REASON_SIGNAL && dbg->reason.signum != -1) {
/* handle signal on continuations here */
int what = r_debug_signal_what (dbg, dbg->reason.signum);
const char *name = r_debug_signal_resolve_i (dbg, dbg->reason.signum);
if (name && strcmp ("SIGTRAP", name))
r_cons_printf ("[+] signal %d aka %s received %d\n",
dbg->reason.signum, name, what);
}
}
return ret;
}
/* Returns PID */
R_API int r_debug_wait(RDebug *dbg) {
int ret = 0;
if (r_debug_is_dead (dbg))
return R_FALSE;
if (dbg && dbg->h && dbg->h->wait) {
dbg->reason = R_DBG_REASON_UNKNOWN;
ret = dbg->h->wait (dbg, dbg->pid);
dbg->reason = ret;
dbg->newstate = 1;
if (ret == -1) {
eprintf ("\n==> Process finished\n\n");
r_debug_select (dbg, -1, -1);
}
//eprintf ("wait = %d\n", ret);
if (dbg->trace->enabled)
r_debug_trace_pc (dbg);
if (ret == R_DBG_REASON_SIGNAL && dbg->signum != -1) {
/* handle signal on continuations here */
int what = r_debug_signal_what (dbg, dbg->signum);
const char *name = r_debug_signal_resolve_i (dbg, dbg->signum);
if (strcmp ("SIGTRAP", name))
r_cons_printf ("[+] signal %d aka %s received\n",
dbg->signum, name);
if (what & R_DBG_SIGNAL_SKIP) {
dbg->signum = 0;
// TODO: use ptrace-setsiginfo to ignore signal
}
if (what & R_DBG_SIGNAL_CONT) {
// XXX: support step, steptrace, continue_until_foo, etc..
r_debug_continue (dbg);
}
}
}
return ret;
}
R_API int r_debug_continue_kill(RDebug *dbg, int sig) {
ut64 pc;
int retwait, ret = R_FALSE;
if (!dbg)
return R_FALSE;
#if __WINDOWS__
r_cons_break(w32_break_process, dbg);
#endif
repeat:
if (r_debug_is_dead (dbg))
return R_FALSE;
if (dbg->h && dbg->h->cont) {
r_bp_restore (dbg->bp, R_TRUE); // set sw breakpoints
ret = dbg->h->cont (dbg, dbg->pid, dbg->tid, sig);
dbg->reason.signum = 0;
retwait = r_debug_wait (dbg);
#if __WINDOWS__
if (retwait != R_DEBUG_REASON_DEAD) {
ret = dbg->tid;
}
#endif
r_bp_restore (dbg->bp, R_FALSE); // unset sw breakpoints
//r_debug_recoil (dbg);
if (r_debug_recoil (dbg) || (dbg->reason.type == R_DEBUG_REASON_BREAKPOINT)) {
/* check if cur bp demands tracing or not */
pc = r_debug_reg_get (dbg, dbg->reg->name[R_REG_NAME_PC]);
RBreakpointItem *b = r_bp_get_at (dbg->bp, pc);
if (b) {
/* check if cur bp demands tracing or not */
if (b->trace) {
eprintf("hit tracepoit at: %"PFMT64x"\n",pc);
} else {
eprintf("hit breakpoint at: %"PFMT64x"\n",pc);
}
if (dbg->trace->enabled)
r_debug_trace_pc (dbg);
// TODO: delegate this to RCore.bphit(RCore, RBreakopintItem)
if (dbg->corebind.core && dbg->corebind.bphit) {
dbg->corebind.bphit (dbg->corebind.core, b);
}
if (b->trace) {
r_debug_step (dbg, 1);
goto repeat;
}
}
}
#if 0
#if __UNIX__
/* XXX Uh? */
if (dbg->stop_all_threads && dbg->pid>0)
r_sandbox_kill (dbg->pid, SIGSTOP);
#endif
#endif
r_debug_select (dbg, dbg->pid, ret);
sig = 0; // clear continuation after signal if needed
if (retwait == R_DEBUG_REASON_SIGNAL && dbg->reason.signum != -1) {
int what = r_debug_signal_what (dbg, dbg->reason.signum);
if (what & R_DBG_SIGNAL_CONT) {
sig = dbg->reason.signum;
eprintf ("Continue into the signal %d handler\n", sig);
goto repeat;
} else if (what & R_DBG_SIGNAL_SKIP) {
// skip signal. requires skipping one instruction
ut8 buf[64];
RAnalOp op = {0};
ut64 pc = r_debug_reg_get (dbg, "pc");
dbg->iob.read_at (dbg->iob.io, pc, buf, sizeof (buf));
r_anal_op (dbg->anal, &op, pc, buf, sizeof (buf));
if (op.size>0) {
const char *signame = r_debug_signal_resolve_i (dbg, dbg->reason.signum);
r_debug_reg_set (dbg, "pc", pc+op.size);
eprintf ("Skip signal %d handler %s\n",
dbg->reason.signum, signame);
goto repeat;
} else {
ut64 pc = r_debug_reg_get (dbg, "pc");
eprintf ("Stalled with an exception at 0x%08"PFMT64x"\n", pc);
}
}
}
}
return ret;
}