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kern: Update init to reflect 10.0.0 changes

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This commit is contained in:
Michael Scire
2020-04-18 22:19:09 -07:00
parent 152a945561
commit bc1d3ccc91
11 changed files with 143 additions and 25 deletions
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20
mesosphere/build_mesosphere.py
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@@ -2,6 +2,20 @@
import sys, os
from struct import pack as pk, unpack as up
ATMOSPHERE_TARGET_FIRMWARE_100 = 1
ATMOSPHERE_TARGET_FIRMWARE_200 = 2
ATMOSPHERE_TARGET_FIRMWARE_300 = 3
ATMOSPHERE_TARGET_FIRMWARE_400 = 4
ATMOSPHERE_TARGET_FIRMWARE_500 = 5
ATMOSPHERE_TARGET_FIRMWARE_600 = 6
ATMOSPHERE_TARGET_FIRMWARE_620 = 7
ATMOSPHERE_TARGET_FIRMWARE_700 = 8
ATMOSPHERE_TARGET_FIRMWARE_800 = 9
ATMOSPHERE_TARGET_FIRMWARE_810 = 10
ATMOSPHERE_TARGET_FIRMWARE_900 = 11
ATMOSPHERE_TARGET_FIRMWARE_910 = 12
ATMOSPHERE_TARGET_FIRMWARE_1000 = 13
def align_up(val, algn):
val += algn - 1
return val - (val % algn)
@@ -18,7 +32,7 @@ def main(argc, argv):
kernel_metadata_offset = 4
assert (kernel_metadata_offset <= len(kernel) - 0x40)
assert (kernel[kernel_metadata_offset:kernel_metadata_offset + 4] == b'MSS0')
kernel_end = up('<I', kernel[kernel_metadata_offset + 0x34:kernel_metadata_offset + 0x38])[0]
kernel_end = up('<I', kernel[kernel_metadata_offset + 0x38:kernel_metadata_offset + 0x3C])[0]
assert (kernel_end >= len(kernel))
embedded_ini = b''
@@ -36,8 +50,8 @@ def main(argc, argv):
with open('mesosphere.bin', 'wb') as f:
f.write(kernel[:kernel_metadata_offset + 4])
f.write(pk('<QQ', embedded_ini_offset, kernel_ldr_offset))
f.write(kernel[kernel_metadata_offset + 0x14:])
f.write(pk('<QQI', embedded_ini_offset, kernel_ldr_offset, ATMOSPHERE_TARGET_FIRMWARE_1000))
f.write(kernel[kernel_metadata_offset + 0x18:])
f.seek(embedded_ini_offset)
f.write(embedded_ini)
f.seek(embedded_ini_end)

38
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
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@@ -34,6 +34,7 @@ namespace ams::kern::init {
constexpr size_t KernelResourceRegionSize = 0x1728000;
constexpr size_t ExtraKernelResourceSize = 0x68000;
static_assert(ExtraKernelResourceSize + KernelResourceRegionSize == 0x1790000);
constexpr size_t KernelResourceReduction_10_0_0 = 0x10000;
/* Global Allocator. */
KInitialPageAllocator g_initial_page_allocator;
@@ -41,6 +42,20 @@ namespace ams::kern::init {
/* Global initial arguments array. */
KPhysicalAddress g_init_arguments_phys_addr[cpu::NumCores];
size_t GetResourceRegionSize() {
/* Decide if Kernel should have enlarged resource region. */
const bool use_extra_resources = KSystemControl::Init::ShouldIncreaseThreadResourceLimit();
size_t resource_region_size = KernelResourceRegionSize + (use_extra_resources ? ExtraKernelResourceSize : 0);
static_assert(KernelResourceRegionSize > InitialProcessBinarySizeMax);
static_assert(KernelResourceRegionSize + ExtraKernelResourceSize > InitialProcessBinarySizeMax);
/* 10.0.0 reduced the kernel resource region size by 64K. */
if (kern::GetTargetFirmware() >= kern::TargetFirmware_10_0_0) {
resource_region_size -= KernelResourceReduction_10_0_0;
}
return resource_region_size;
}
/* Page table attributes. */
constexpr PageTableEntry KernelRoDataAttribute(PageTableEntry::Permission_KernelR, PageTableEntry::PageAttribute_NormalMemory, PageTableEntry::Shareable_InnerShareable);
constexpr PageTableEntry KernelRwDataAttribute(PageTableEntry::Permission_KernelRW, PageTableEntry::PageAttribute_NormalMemory, PageTableEntry::Shareable_InnerShareable);
@@ -138,16 +153,15 @@ namespace ams::kern::init {
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_region_start), StackRegionSize, KMemoryRegionType_KernelStack));
/* Decide if Kernel should have enlarged resource region (slab region + page table heap region). */
const bool use_extra_resources = KSystemControl::Init::ShouldIncreaseThreadResourceLimit();
const size_t resource_region_size = KernelResourceRegionSize + (use_extra_resources ? ExtraKernelResourceSize : 0);
const size_t resource_region_size = GetResourceRegionSize();
/* Determine the size of the slab region. */
const size_t slab_region_size = CalculateTotalSlabHeapSize();
MESOSPHERE_INIT_ABORT_UNLESS(slab_region_size <= resource_region_size);
/* Setup the slab region. */
const KPhysicalAddress code_start_phys_addr = ttbr1_table.GetPhysicalAddress(code_start_virt_addr);
const KPhysicalAddress code_end_phys_addr = code_start_phys_addr + (code_end_virt_addr - code_start_virt_addr);
const KPhysicalAddress code_start_phys_addr = ttbr1_table.GetPhysicalAddressOfRandomizedRange(code_start_virt_addr, code_region_size);
const KPhysicalAddress code_end_phys_addr = code_start_phys_addr + code_region_size;
const KPhysicalAddress slab_start_phys_addr = code_end_phys_addr;
const KPhysicalAddress slab_end_phys_addr = slab_start_phys_addr + slab_region_size;
constexpr size_t SlabRegionAlign = KernelAslrAlignment;
@@ -155,9 +169,6 @@ namespace ams::kern::init {
const KVirtualAddress slab_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(slab_region_needed_size, SlabRegionAlign, KMemoryRegionType_Kernel) + (GetInteger(code_end_phys_addr) % SlabRegionAlign);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(slab_region_start), slab_region_size, KMemoryRegionType_KernelSlab));
/* Set the slab region's pair region. */
KMemoryLayout::GetVirtualMemoryRegionTree().FindFirstRegionByTypeAttr(KMemoryRegionType_KernelSlab)->SetPairAddress(GetInteger(slab_start_phys_addr));
/* Setup the temp region. */
constexpr size_t TempRegionSize = 128_MB;
constexpr size_t TempRegionAlign = KernelAslrAlignment;
@@ -206,15 +217,20 @@ namespace ams::kern::init {
SetupDramPhysicalMemoryRegions();
/* Insert a physical region for the kernel code region. */
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetPhysicalMemoryRegionTree().Insert(GetInteger(code_start_phys_addr), (code_end_virt_addr - code_start_virt_addr), KMemoryRegionType_DramKernelCode));
KMemoryLayout::GetPhysicalMemoryRegionTree().FindFirstRegionByTypeAttr(KMemoryRegionType_DramKernelCode)->SetPairAddress(code_start_virt_addr);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetPhysicalMemoryRegionTree().Insert(GetInteger(code_start_phys_addr), code_region_size, KMemoryRegionType_DramKernelCode));
/* Insert a physical region for the kernel slab region. */
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetPhysicalMemoryRegionTree().Insert(GetInteger(slab_start_phys_addr), slab_region_size, KMemoryRegionType_DramKernelSlab));
KMemoryLayout::GetPhysicalMemoryRegionTree().FindFirstRegionByTypeAttr(KMemoryRegionType_DramKernelSlab)->SetPairAddress(GetInteger(slab_region_start));
/* Map and clear the slab region. */
/* Map the slab region. */
ttbr1_table.Map(slab_region_start, slab_region_size, slab_start_phys_addr, KernelRwDataAttribute, g_initial_page_allocator);
/* Physically randomize the slab region. */
/* NOTE: Nintendo does this only on 10.0.0+ */
ttbr1_table.PhysicallyRandomize(slab_region_start, slab_region_size, false);
cpu::StoreEntireCacheForInit();
/* Clear the slab region. */
std::memset(GetVoidPointer(slab_region_start), 0, slab_region_size);
/* Determine size available for kernel page table heaps, requiring > 8 MB. */

11
mesosphere/kernel/source/arch/arm64/init/start.s
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@@ -65,7 +65,7 @@ __metadata_kernel_layout:
.type _ZN3ams4kern17GetTargetFirmwareEv, %function
_ZN3ams4kern17GetTargetFirmwareEv:
adr x0, __metadata_target_firmware
ldr x0, [x0]
ldr w0, [x0]
ret
/* ams::kern::init::StartCore0(uintptr_t, uintptr_t) */
@@ -101,6 +101,15 @@ core0_el1:
add x2, x0, x2
LOAD_FROM_LABEL(x3, __metadata_kernelldr_offset)
add x3, x0, x3
/* If kernelldr is ours, set its target firmware. */
ldr w4, [x3, #4]
LOAD_IMMEDIATE_32(w5, 0x30444C4D)
cmp w4, w5
b.ne 1f
LOAD_FROM_LABEL(x4, __metadata_target_firmware)
str w4, [x3, #8]
1:
blr x3
/* At this point kernelldr has been invoked, and we are relocated at a random virtual address. */

2
mesosphere/kernel_ldr/source/arch/arm64/start.s
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@@ -109,7 +109,7 @@ _main:
.type _ZN3ams4kern17GetTargetFirmwareEv, %function
_ZN3ams4kern17GetTargetFirmwareEv:
adr x0, __metadata_target_firmware
ldr x0, [x0]
ldr w0, [x0]
ret
.balign 8

2
mesosphere/kernel_ldr/source/kern_init_loader.cpp
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@@ -304,7 +304,7 @@ namespace ams::kern::init::loader {
ttbr1_table.Map(virtual_base_address + ro_offset, ro_end_offset - ro_offset, base_address + ro_offset, KernelRwDataAttribute, g_initial_page_allocator);
ttbr1_table.Map(virtual_base_address + rw_offset, bss_end_offset - rw_offset, base_address + rw_offset, KernelRwDataAttribute, g_initial_page_allocator);
/* On 10.0.0+, Physicaly randomize the kernel region. */
/* On 10.0.0+, Physically randomize the kernel region. */
if (kern::GetTargetFirmware() >= kern::TargetFirmware_10_0_0) {
ttbr1_table.PhysicallyRandomize(virtual_base_address + rx_offset, bss_end_offset - rx_offset, true);
}