/*
* switch to another cpu
*/
void
kdb_on(
int cpu)
{
KDB_SAVE_CTXT();
if (cpu < 0 || cpu >= NCPUS || !debugger_active[cpu])
return;
db_set_breakpoints();
db_set_watchpoints();
debugger_cpu = cpu;
unlock_debugger();
lock_debugger();
db_clear_breakpoints();
db_clear_watchpoints();
KDB_RESTORE_CTXT();
if (debugger_cpu == -1) {/* someone continued */
debugger_cpu = cpu_number();
db_continue_cmd(0, 0, 0, "");
}
}
boolean_t
db_stop_at_pc(boolean_t *is_breakpoint)
{
db_addr_t pc;
db_breakpoint_t bkpt;
db_clear_single_step(DDB_REGS);
db_clear_breakpoints();
db_clear_watchpoints();
pc = PC_REGS(DDB_REGS);
#ifdef FIXUP_PC_AFTER_BREAK
if (*is_breakpoint) {
/*
* Breakpoint trap. Fix up the PC if the
* machine requires it.
*/
FIXUP_PC_AFTER_BREAK
pc = PC_REGS(DDB_REGS);
}
#endif
/*
* Now check for a breakpoint at this address.
*/
bkpt = db_find_breakpoint_here(pc);
if (bkpt) {
if (--bkpt->count == 0) {
bkpt->count = bkpt->init_count;
*is_breakpoint = TRUE;
return (TRUE); /* stop here */
}
} else if (*is_breakpoint) {
#ifdef __x86_64__
ddb_regs.tf_rip += 1;
#endif
}
*is_breakpoint = FALSE;
if (db_run_mode == STEP_INVISIBLE) {
db_run_mode = STEP_CONTINUE;
return (FALSE); /* continue */
}
if (db_run_mode == STEP_COUNT) {
return (FALSE); /* continue */
}
if (db_run_mode == STEP_ONCE) {
if (--db_loop_count > 0) {
if (db_sstep_print) {
db_printf("\t\t");
db_print_loc_and_inst(pc, DDB_REGS);
db_printf("\n");
}
return (FALSE); /* continue */
}
}
if (db_run_mode == STEP_RETURN) {
db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
/* continue until matching return */
if (!inst_trap_return(ins) &&
(!inst_return(ins) || --db_call_depth != 0)) {
if (db_sstep_print) {
if (inst_call(ins) || inst_return(ins)) {
int i;
db_printf("[after %6d] ", db_inst_count);
for (i = db_call_depth; --i > 0; )
db_printf(" ");
db_print_loc_and_inst(pc, DDB_REGS);
db_printf("\n");
}
}
if (inst_call(ins))
db_call_depth++;
return (FALSE); /* continue */
}
}
if (db_run_mode == STEP_CALLT) {
db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
/* continue until call or return */
if (!inst_call(ins) &&
!inst_return(ins) &&
!inst_trap_return(ins)) {
return (FALSE); /* continue */
}
}
db_run_mode = STEP_NONE;
return (TRUE);
}
boolean_t
db_stop_at_pc(
boolean_t *is_breakpoint,
task_t task,
task_t space)
{
register db_thread_breakpoint_t bkpt;
db_clear_task_single_step(DDB_REGS, space);
db_clear_breakpoints();
db_clear_watchpoints();
db_stop_pc = PC_REGS(DDB_REGS);
#ifdef FIXUP_PC_AFTER_BREAK
if (*is_breakpoint) {
/*
* Breakpoint trap. Fix up the PC if the
* machine requires it.
*/
FIXUP_PC_AFTER_BREAK
db_stop_pc = PC_REGS(DDB_REGS);
}
#endif
/*
* Now check for a breakpoint at this address.
*/
bkpt = db_find_thread_breakpoint_here(space, db_stop_pc);
if (bkpt) {
if (db_cond_check(bkpt)) {
*is_breakpoint = TRUE;
return (TRUE); /* stop here */
}
}
*is_breakpoint = FALSE;
if (db_run_mode == STEP_INVISIBLE) {
db_run_mode = STEP_CONTINUE;
return (FALSE); /* continue */
}
if (db_run_mode == STEP_COUNT) {
return (FALSE); /* continue */
}
if (db_run_mode == STEP_ONCE) {
if (--db_loop_count > 0) {
if (db_sstep_print) {
db_print_loc_and_inst(db_stop_pc, task);
}
return (FALSE); /* continue */
}
}
if (db_run_mode == STEP_RETURN) {
jmp_buf_t *prev;
jmp_buf_t db_jmpbuf;
/* WARNING: the following assumes an instruction fits an int */
db_expr_t ins;
ins = db_get_task_value(db_stop_pc, sizeof(int), FALSE, space);
/* continue until matching return */
prev = db_recover;
if (_setjmp(db_recover = &db_jmpbuf) == 0) {
if (!inst_trap_return(ins) &&
(!inst_return(ins) || --db_call_depth != 0)) {
if (db_sstep_print) {
if (inst_call(ins) || inst_return(ins)) {
register int i;
db_printf("[after %6d /%4d] ",
db_inst_count,
db_inst_count - db_last_inst_count);
db_last_inst_count = db_inst_count;
for (i = db_call_depth; --i > 0; )
db_printf(" ");
db_print_loc_and_inst(db_stop_pc, task);
db_printf("\n");
}
}
if (inst_call(ins))
db_call_depth++;
db_recover = prev;
if (db_step_again())
return (FALSE); /* continue */
}
}
db_recover = prev;
}
if (db_run_mode == STEP_CALLT) {
/* WARNING: the following assumes an instruction fits an int */
db_expr_t ins;
ins = db_get_task_value(db_stop_pc, sizeof(int), FALSE, space);
/* continue until call or return */
if (!inst_call(ins) &&
!inst_return(ins) &&
!inst_trap_return(ins)) {
if (db_step_again())
return (FALSE); /* continue */
}
}
if (db_find_breakpoint_here(space, db_stop_pc))
return(FALSE);
db_run_mode = STEP_NONE;
return (TRUE);
}
bool
db_stop_at_pc(db_regs_t *regs, bool *is_breakpoint)
{
db_addr_t pc;
db_breakpoint_t bkpt;
pc = PC_REGS(regs);
#ifdef FIXUP_PC_AFTER_BREAK
if (*is_breakpoint) {
/*
* Breakpoint trap. Regardless if we treat this as a
* real breakpoint (e.g. software single-step), fix up the PC.
*/
FIXUP_PC_AFTER_BREAK(regs);
pc = PC_REGS(regs);
}
#endif
#ifdef SOFTWARE_SSTEP
/*
* If we stopped at one of the single-step breakpoints, say it's not
* really a breakpoint so that we don't skip over the real instruction.
*/
if (db_taken_bkpt.address == pc || db_not_taken_bkpt.address == pc)
*is_breakpoint = false;
#endif /* SOFTWARE_SSTEP */
db_clear_single_step(regs);
db_clear_breakpoints();
db_clear_watchpoints();
/*
* Now check for a breakpoint at this address.
*/
bkpt = db_find_breakpoint_here(pc);
if (bkpt) {
if (--bkpt->count == 0) {
bkpt->count = bkpt->init_count;
*is_breakpoint = true;
return (true); /* stop here */
}
} else if (*is_breakpoint) {
#ifdef PC_ADVANCE
PC_ADVANCE(regs);
#else
PC_REGS(regs) += BKPT_SIZE;
#endif
}
*is_breakpoint = false;
if (db_run_mode == STEP_INVISIBLE) {
db_run_mode = STEP_CONTINUE;
return (false); /* continue */
}
if (db_run_mode == STEP_COUNT) {
return (false); /* continue */
}
if (db_run_mode == STEP_ONCE) {
if (--db_loop_count > 0) {
if (db_sstep_print) {
db_printf("\t\t");
db_print_loc_and_inst(pc);
db_printf("\n");
}
return (false); /* continue */
}
}
if (db_run_mode == STEP_RETURN) {
db_expr_t ins = db_get_value(pc, sizeof(int), false);
/* continue until matching return */
if (!inst_trap_return(ins) &&
(!inst_return(ins) || --db_call_depth != 0)) {
if (db_sstep_print) {
if (inst_call(ins) || inst_return(ins)) {
int i;
db_printf("[after %6d] ",
db_inst_count);
for (i = db_call_depth; --i > 0; )
db_printf(" ");
db_print_loc_and_inst(pc);
db_printf("\n");
}
}
if (inst_call(ins))
db_call_depth++;
return (false); /* continue */
}
}
if (db_run_mode == STEP_CALLT) {
db_expr_t ins = db_get_value(pc, sizeof(int), false);
/* continue until call or return */
if (!inst_call(ins) &&
!inst_return(ins) &&
!inst_trap_return(ins)) {
return (false); /* continue */
}
}
db_run_mode = STEP_NONE;
return (true);
}
boolean_t
db_stop_at_pc(db_regs_t *regs, boolean_t *is_breakpoint)
{
db_addr_t pc, old_pc;
db_breakpoint_t bkpt;
db_clear_breakpoints();
db_clear_watchpoints();
old_pc = pc = PC_REGS(regs);
#ifdef FIXUP_PC_AFTER_BREAK
if (*is_breakpoint) {
/*
* Breakpoint trap. Fix up the PC if the
* machine requires it.
*/
FIXUP_PC_AFTER_BREAK(regs);
pc = PC_REGS(regs);
}
#endif
/*
* Now check for a breakpoint at this address.
*/
bkpt = db_find_breakpoint_here(pc);
if (bkpt) {
if (--bkpt->count == 0) {
db_clear_single_step(regs);
bkpt->count = bkpt->init_count;
*is_breakpoint = TRUE;
return (TRUE); /* stop here */
}
} else if (*is_breakpoint
#ifdef SOFTWARE_SSTEP
&& !((db_taken_bkpt && db_taken_bkpt->address == pc) ||
(db_not_taken_bkpt && db_not_taken_bkpt->address == pc))
#endif
) {
#ifdef PC_ADVANCE
PC_ADVANCE(regs);
#else
# ifdef SET_PC_REGS
SET_PC_REGS(regs, old_pc);
# else
PC_REGS(regs) = old_pc;
# endif
#endif
}
db_clear_single_step(regs);
*is_breakpoint = FALSE;
if (db_run_mode == STEP_INVISIBLE) {
db_run_mode = STEP_CONTINUE;
return (FALSE); /* continue */
}
if (db_run_mode == STEP_COUNT) {
return (FALSE); /* continue */
}
if (db_run_mode == STEP_ONCE) {
if (--db_loop_count > 0) {
if (db_sstep_print) {
db_printf("\t\t");
db_print_loc_and_inst(pc);
db_printf("\n");
}
return (FALSE); /* continue */
}
}
if (db_run_mode == STEP_RETURN) {
db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
/* continue until matching return */
if (!inst_trap_return(ins) &&
(!inst_return(ins) || --db_call_depth != 0)) {
if (db_sstep_print) {
if (inst_call(ins) || inst_return(ins)) {
int i;
db_printf("[after %6d] ", db_inst_count);
for (i = db_call_depth; --i > 0; )
db_printf(" ");
db_print_loc_and_inst(pc);
db_printf("\n");
}
}
if (inst_call(ins))
db_call_depth++;
return (FALSE); /* continue */
}
}
if (db_run_mode == STEP_CALLT) {
db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
/* continue until call or return */
if (!inst_call(ins) && !inst_return(ins) &&
!inst_trap_return(ins)) {
return (FALSE); /* continue */
}
}
db_run_mode = STEP_NONE;
return (TRUE);
}
