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kern: add hardware single step extension

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This commit is contained in:
Michael Scire 2021-07-27 05:34:40 -07:00 • committed by SciresM
parent 904ab19823
commit 4075d24e0c
10 changed files with 226 additions and 4 deletions
libraries/libmesosphere/source
kern_k_debug_base.cpp

33
libraries/libmesosphere/source/kern_k_debug_base.cpp
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@ -372,6 +372,14 @@ namespace ams::kern {
new_state = state;
}
/* Clear single step on all threads. */
{
auto end = target->GetThreadList().end();
for (auto it = target->GetThreadList().begin(); it != end; ++it) {
it->ClearSingleStep();
}
}
/* Detach from the process. */
target->ClearDebugObject(new_state);
m_process = nullptr;
@ -479,6 +487,25 @@ namespace ams::kern {
}
}
/* Update thread single-step state. */
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
{
if ((context_flags & ams::svc::ThreadContextFlag_SetSingleStep) != 0) {
/* Set single step. */
thread->SetSingleStep();
/* If no other thread flags are present, we're done. */
R_SUCCEED_IF((context_flags & ~ams::svc::ThreadContextFlag_SetSingleStep) == 0);
} else if ((context_flags & ams::svc::ThreadContextFlag_ClearSingleStep) != 0) {
/* Clear single step. */
thread->ClearSingleStep();
/* If no other thread flags are present, we're done. */
R_SUCCEED_IF((context_flags & ~ams::svc::ThreadContextFlag_ClearSingleStep) == 0);
}
}
#endif
/* Verify that the thread's svc state is valid. */
if (thread->IsCallingSvc()) {
const u8 svc_id = thread->GetSvcId();
@ -873,6 +900,9 @@ namespace ams::kern {
{
auto end = process->GetThreadList().end();
for (auto it = process->GetThreadList().begin(); it != end; ++it) {
/* Clear the thread's single-step state. */
it->ClearSingleStep();
if (resume) {
/* If the process isn't crashed, resume threads. */
it->Resume(KThread::SuspendType_Debug);
@ -960,9 +990,10 @@ namespace ams::kern {
/* Set the process as breaked. */
process->SetDebugBreak();
/* If the event is an exception, set the result. */
/* If the event is an exception, set the result and clear single step. */
if (event == ams::svc::DebugEvent_Exception) {
GetCurrentThread().SetDebugExceptionResult(ResultSuccess());
GetCurrentThread().ClearSingleStep();
}
/* Exit our retry loop. */