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Proper handling of SetApplicationCpuTimeLimit with invalid parameters (#353)

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* Add NotImplemented error code

* Add proper handling of SetAppCpuTimeLimit with invalid params

Set default time limit to 0

* Add AppCpuTimeLimit tests

* Replace spaces with tab
This commit is contained in:
noumidev 2023-12-18 19:45:57 +01:00 • committed by GitHub
parent 6dc75db37f
commit 6c73fb13c5
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5 changed files with 324 additions and 9 deletions
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17
src/core/services/apt.cpp
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@ -34,8 +34,8 @@ namespace APTCommands {
}
void APTService::reset() {
// Set the default CPU time limit to 30%. Seems safe, as this is what Metroid 2 uses by default
cpuTimeLimit = 30;
// Set the default CPU time limit to 0%. Appears to be the default value on hardware
cpuTimeLimit = 0;
// Reset the handles for the various service objects
lockHandle = std::nullopt;
@ -311,15 +311,16 @@ void APTService::setApplicationCpuTimeLimit(u32 messagePointer) {
u32 percentage = mem.read32(messagePointer + 8); // CPU time percentage between 5% and 89%
log("APT::SetApplicationCpuTimeLimit (percentage = %d%%)\n", percentage);
mem.write32(messagePointer, IPC::responseHeader(0x4F, 1, 0));
// If called with invalid parameters, the current time limit is left unchanged, and OS::NotImplemented is returned
if (percentage < 5 || percentage > 89 || fixed != 1) {
Helpers::warn("Invalid parameter passed to APT::SetApplicationCpuTimeLimit: (percentage, fixed) = (%d, %d)\n", percentage, fixed);
// TODO: Does the clamp operation happen? Verify with getApplicationCpuTimeLimit on hardware
percentage = std::clamp<u32>(percentage, 5, 89);
mem.write32(messagePointer + 4, Result::OS::NotImplemented);
} else {
mem.write32(messagePointer + 4, Result::Success);
cpuTimeLimit = percentage;
}
mem.write32(messagePointer, IPC::responseHeader(0x4F, 1, 0));
mem.write32(messagePointer + 4, Result::Success);
cpuTimeLimit = percentage;
}
void APTService::getApplicationCpuTimeLimit(u32 messagePointer) {