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kern: Add real SvcBreak implementation

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Michael Scire 2020-07-31 00:04:43 -07:00 • committed by SciresM
parent 4c3c910774
commit 325802e29d
5 changed files with 160 additions and 11 deletions
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49
libraries/libmesosphere/source/svc/kern_svc_exception.cpp
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@ -21,25 +21,54 @@ namespace ams::kern::svc {
namespace {
void Break(ams::svc::BreakReason break_reason, uintptr_t address, size_t size) {
/* Log for debug that Break was called. */
MESOSPHERE_LOG("%s: Break(%08x, %016lx, %zu)\n", GetCurrentProcess().GetName(), static_cast<u32>(break_reason), address, size);
[[maybe_unused]] void PrintBreak(ams::svc::BreakReason break_reason) {
/* Print that break was called. */
MESOSPHERE_RELEASE_LOG("%s: svc::Break(%d) was called, pid=%ld, tid=%ld\n", GetCurrentProcess().GetName(), static_cast<s32>(break_reason), GetCurrentProcess().GetId(), GetCurrentThread().GetId());
/* If the current process is attached to debugger, notify it. */
/* Print the current thread's registers. */
/* TODO: KDebug::PrintRegisters(); */
/* Print a backtrace. */
/* TODO: KDebug::PrintBacktrace(); */
}
void Break(ams::svc::BreakReason break_reason, uintptr_t address, size_t size) {
/* Determine whether the break is only a notification. */
const bool is_notification = (break_reason & ams::svc::BreakReason_NotificationOnlyFlag) != 0;
/* If the break isn't a notification, print it. */
if (!is_notification) {
#ifdef MESOSPHERE_BUILD_FOR_DEBUGGING
PrintBreak(break_reason);
#endif
}
/* If the current process is attached to debugger, try to notify it. */
if (GetCurrentProcess().IsAttachedToDebugger()) {
MESOSPHERE_UNIMPLEMENTED();
if (R_SUCCEEDED(KDebug::BreakIfAttached(break_reason, address, size))) {
/* If we attached, set the pc to the instruction before the current one and return. */
KDebug::SetPreviousProgramCounter();
return;
}
}
/* If the break is only a notification, we're done. */
if ((break_reason & ams::svc::BreakReason_NotificationOnlyFlag) != 0) {
if (is_notification) {
return;
}
/* TODO */
if (size == sizeof(u32)) {
MESOSPHERE_LOG("DEBUG: %08x\n", *reinterpret_cast<u32 *>(address));
/* Print that break was called. */
MESOSPHERE_RELEASE_LOG("Break() called. %016lx\n", GetCurrentProcess().GetProgramId());
/* Try to enter JIT debug state. */
if (GetCurrentProcess().EnterJitDebug(ams::svc::DebugEvent_Exception, ams::svc::DebugException_UserBreak, KDebug::GetProgramCounter(GetCurrentThread()), break_reason, address, size)) {
/* We entered JIT debug, so set the pc to the instruction before the current one and return. */
KDebug::SetPreviousProgramCounter();
return;
}
MESOSPHERE_PANIC("Break was called\n");
/* Exit the current process. */
GetCurrentProcess().Exit();
}
}