OmniNX/Atmosphere
0
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 1 Wiki Activity

kern/loader: make aware of new address space and shadow stack region

Browse Source
This commit is contained in:
Alula
2026-09-13 11:41:53 +02:00
parent e6a3d71692
commit 0f15010ba5
25 changed files with 238 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
View File

@@ -224,15 +224,20 @@ namespace ams::kern::init {
static_assert(kern::arch::arm64::init::IsInitialPageAllocator<KInitialPageAllocatorForFinalizeIdentityMapping>);
void SetupAllTtbr0Entries(KInitialPageTable &init_pt, KInitialPageAllocator &allocator) {
/* Validate that the ttbr0 array is in rodata. */
/* Validate that the ttbr0/tcr_el1 arrays are in rodata. */
const uintptr_t rodata_start = reinterpret_cast<uintptr_t>(__rodata_start);
const uintptr_t rodata_end = reinterpret_cast<uintptr_t>(__rodata_end);
MESOSPHERE_INIT_ABORT_UNLESS(rodata_start < rodata_end);
MESOSPHERE_INIT_ABORT_UNLESS(rodata_start <= reinterpret_cast<uintptr_t>(std::addressof(KPageTable::GetTtbr0Entry(0))));
MESOSPHERE_INIT_ABORT_UNLESS(reinterpret_cast<uintptr_t>(std::addressof(KPageTable::GetTtbr0Entry(KPageTable::NumTtbr0Entries))) < rodata_end);
MESOSPHERE_INIT_ABORT_UNLESS(reinterpret_cast<uintptr_t>(std::addressof(KPageTable::GetTtbr0Entry(KPageTable::NumPTEntries))) < rodata_end);
MESOSPHERE_INIT_ABORT_UNLESS(rodata_start <= reinterpret_cast<uintptr_t>(std::addressof(KPageTable::GetTcrEL1Entry(0))));
MESOSPHERE_INIT_ABORT_UNLESS(reinterpret_cast<uintptr_t>(std::addressof(KPageTable::GetTcrEL1Entry(KPageTable::NumPTEntries))) < rodata_end);
/* Get the default tcr_el1 value, with T0SZ set for a 39-bit address space. */
const u64 tcr_el1 = (cpu::GetTcrEl1() & ~UINT64_C(0x3F)) | UINT64_C(64 - 39);
/* Allocate pages for all ttbr0 entries. */
for (size_t i = 0; i < KPageTable::NumTtbr0Entries; ++i) {
for (size_t i = 0; i < KPageTable::NumPTEntries; ++i) {
/* Allocate a page. */
KPhysicalAddress page = allocator.Allocate(PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(page != Null<KPhysicalAddress>);
@@ -245,6 +250,12 @@ namespace ams::kern::init {
/* Set the entry to the newly allocated page. */
*reinterpret_cast<volatile u64 *>(GetInteger(ttbr0_phys_ptr)) = (static_cast<u64>(i) << 48) | GetInteger(page);
/* Get the physical address of the tcr_el1 entry. */
const auto tcr_el1_phys_ptr = init_pt.GetPhysicalAddress(KVirtualAddress(std::addressof(KPageTable::GetTcrEL1Entry(i))));
/* Set the entry to the default tcr_el1 value. */
*reinterpret_cast<volatile u64 *>(GetInteger(tcr_el1_phys_ptr)) = tcr_el1;
}
}