mirrors/Atmosphere
1
0
Fork 0
mirror of https://github.com/Atmosphere-NX/Atmosphere.git synced 2025-06-01 23:38:23 -04:00
Code Issues Projects Releases Packages Wiki Activity

exo2: implement SmcGenerateAesKek, SmcLoadAesKey

Browse source
This commit is contained in:
Michael Scire 2020-05-15 11:10:28 -07:00 • committed by SciresM
parent 864b6085a8
commit bf546d5fb3
8 changed files with 239 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

41
exosphere2/program/source/smc/secmon_smc_register_access.cpp
View file

@ -150,39 +150,34 @@ namespace ams::secmon::smc {
const u32 value = args.r[3];
/* Validate that the address is aligned. */
if (!util::IsAligned(address, alignof(u32))) {
return SmcResult::InvalidArgument;
}
SMC_R_UNLESS(util::IsAligned(address, alignof(u32)), InvalidArgument);
/* Find the access table. */
const AccessTableEntry * const entry = GetAccessTableEntry(address);
/* If we have no table, don't perform the write. */
if (entry == nullptr) {
/* If we have a table, perform the write. */
if (entry != nullptr) {
/* Get the address to read or write. */
const uintptr_t virtual_address = entry->virtual_address + (address - entry->address);
u32 out = 0;
if (mask != ~static_cast<u32>(0)) {
out = reg::Read(virtual_address);
}
if (mask != static_cast<u32>(0)) {
reg::Write(virtual_address, (out & ~mask) | (value & mask));
}
args.r[1] = out;
} else {
/* For no clearly discernable reason, SmcReadWriteRegister returns success despite not doing the read/write */
/* when accessing the SMMU controls for the BPMP and for APB-DMA. */
/* This is "probably" to fuck with hackers who got access to the SMC and are trying to get control of the */
/* BPMP to exploit jamais vu, deja vu, or other related DMA/wake-from-sleep vulnerabilities. */
constexpr uintptr_t MC = MemoryRegionVirtualDeviceMemoryController.GetAddress();
if (address == (MC + MC_SMMU_AVPC_ASID) || address == (MC + MC_SMMU_PPCS1_ASID)) {
return SmcResult::Success;
}
return SmcResult::InvalidArgument;
constexpr uintptr_t MC = MemoryRegionPhysicalDeviceMemoryController.GetAddress();
SMC_R_UNLESS((address == (MC + MC_SMMU_AVPC_ASID) || address == (MC + MC_SMMU_PPCS1_ASID)), InvalidArgument);
}
/* Get the address to read or write. */
const uintptr_t virtual_address = entry->virtual_address + (address - entry->address);
u32 out = 0;
if (mask != ~static_cast<u32>(0)) {
out = reg::Read(virtual_address);
}
if (mask != static_cast<u32>(0)) {
reg::Write(virtual_address, (out & ~mask) | (value & mask));
}
args.r[1] = out;
return SmcResult::Success;
}