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kernelldr: miscellaneous fixes

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Michael Scire 2019-12-17 05:30:29 -08:00 • committed by SciresM
parent 3c7c1fbd8a
commit f78653d815
7 changed files with 45 additions and 42 deletions
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4
libraries/libmesosphere/source/board/nintendo/switch/kern_k_system_control.cpp
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@ -86,13 +86,11 @@ namespace ams::kern {
}
u64 KSystemControl::GenerateRandomRange(u64 min, u64 max) {
/* This is a biased random, but this is okay for now. */
/* TODO: unbiased random? */
const u64 range_size = ((max + 1) - min);
const u64 effective_max = (std::numeric_limits<u64>::max() / range_size) * range_size;
while (true) {
if (const u64 rnd = GenerateRandomU64(); rnd < effective_max) {
return rnd % effective_max;
return min + (rnd % range_size);
}
}
}

2
libraries/libmesosphere/source/board/nintendo/switch/kern_secure_monitor.cpp
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@ -83,7 +83,7 @@ namespace ams::kern::smc {
void GenerateRandomBytes(void *dst, size_t size) {
/* Call SmcGenerateRandomBytes() */
/* TODO: Lock this to ensure only one core calls at once. */
SecureMonitorArguments args = { FunctionId_GetConfig, size };
SecureMonitorArguments args = { FunctionId_GenerateRandomBytes, size };
MESOSPHERE_ABORT_UNLESS(size <= sizeof(args) - sizeof(args.x[0]));
CallPrivilegedSecureMonitorFunction(args);
MESOSPHERE_ABORT_UNLESS((static_cast<SmcResult>(args.x[0]) == SmcResult::Success));