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kern: Support older SVC ABIs

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This commit is contained in:
Michael Scire 2020-07-13 18:50:37 -07:00 committed by SciresM
parent 3d2eb8e903
commit ff022115ca
7 changed files with 94 additions and 21 deletions
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48
libraries/libmesosphere/source/arch/arm64/svc/kern_svc_tables.cpp
View file

@ -55,7 +55,7 @@ namespace ams::kern::svc {
std::array<SvcTableEntry, NumSupervisorCalls> table = {};
#define AMS_KERN_SVC_SET_TABLE_ENTRY(ID, RETURN_TYPE, NAME, ...) \
table[ID] = NAME::Call64From32;
if (table[ID] == nullptr) { table[ID] = NAME::Call64From32; }
AMS_SVC_FOREACH_KERN_DEFINITION(AMS_KERN_SVC_SET_TABLE_ENTRY, _)
#undef AMS_KERN_SVC_SET_TABLE_ENTRY
@ -66,7 +66,7 @@ namespace ams::kern::svc {
std::array<SvcTableEntry, NumSupervisorCalls> table = {};
#define AMS_KERN_SVC_SET_TABLE_ENTRY(ID, RETURN_TYPE, NAME, ...) \
table[ID] = NAME::Call64;
if (table[ID] == nullptr) { table[ID] = NAME::Call64; }
AMS_SVC_FOREACH_KERN_DEFINITION(AMS_KERN_SVC_SET_TABLE_ENTRY, _)
#undef AMS_KERN_SVC_SET_TABLE_ENTRY
@ -92,4 +92,48 @@ namespace ams::kern::svc {
constinit const std::array<SvcTableEntry, NumSupervisorCalls> SvcTable64From32 = SvcTable64From32Impl;
namespace {
/* NOTE: Although the SVC tables are constants, our global constructor will run before .rodata is protected R--. */
class SvcTablePatcher {
private:
using SvcTable = std::array<SvcTableEntry, NumSupervisorCalls>;
private:
static SvcTablePatcher s_instance;
private:
ALWAYS_INLINE volatile SvcTableEntry *GetEditableTable(const SvcTable *table) {
if (table != nullptr) {
return const_cast<volatile SvcTableEntry *>(table->data());
} else {
return nullptr;
}
}
/* TODO: This should perhaps be implemented in assembly. */
NOINLINE void PatchTables(volatile SvcTableEntry *table_64, volatile SvcTableEntry *table_64_from_32) {
/* Get the target firmware. */
const auto target_fw = kern::GetTargetFirmware();
/* 10.0.0 broke the ABI for QueryIoMapping. */
if (target_fw < TargetFirmware_10_0_0) {
if (table_64) { table_64[ svc::SvcId_QueryIoMapping] = LegacyQueryIoMapping::Call64; }
if (table_64_from_32) { table_64_from_32[svc::SvcId_QueryIoMapping] = LegacyQueryIoMapping::Call64From32; }
}
/* 3.0.0 broke the ABI for ContinueDebugEvent. */
if (target_fw < TargetFirmware_3_0_0) {
if (table_64) { table_64[ svc::SvcId_ContinueDebugEvent] = LegacyContinueDebugEvent::Call64; }
if (table_64_from_32) { table_64_from_32[svc::SvcId_ContinueDebugEvent] = LegacyContinueDebugEvent::Call64From32; }
}
}
public:
SvcTablePatcher(const SvcTable *table_64, const SvcTable *table_64_from_32) {
PatchTables(GetEditableTable(table_64), GetEditableTable(table_64_from_32));
}
};
SvcTablePatcher SvcTablePatcher::s_instance(std::addressof(SvcTable64), std::addressof(SvcTable64From32));
}
}

4
libraries/libmesosphere/source/kern_kernel.cpp
View file

@ -116,11 +116,13 @@ namespace ams::kern {
}
void Kernel::PrintLayout() {
const auto target_fw = kern::GetTargetFirmware();
/* Print out the kernel version. */
/* TODO: target firmware, if we support that? */
MESOSPHERE_LOG("Horizon Kernel (Mesosphere)\n");
MESOSPHERE_LOG("Built: %s %s\n", __DATE__, __TIME__);
MESOSPHERE_LOG("Atmosphere version: %d.%d.%d-%s\n", ATMOSPHERE_RELEASE_VERSION, ATMOSPHERE_GIT_REVISION);
MESOSPHERE_LOG("Target Firmware: %d.%d.%d\n", (target_fw >> 24) & 0xFF, (target_fw >> 16) & 0xFF, (target_fw >> 8) & 0xFF);
MESOSPHERE_LOG("Supported OS version: %d.%d.%d\n", ATMOSPHERE_SUPPORTED_HOS_VERSION_MAJOR, ATMOSPHERE_SUPPORTED_HOS_VERSION_MINOR, ATMOSPHERE_SUPPORTED_HOS_VERSION_MICRO);
MESOSPHERE_LOG("\n");

16
libraries/libmesosphere/source/svc/kern_svc_address_translation.cpp
View file

@ -93,7 +93,13 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcQueryPhysicalAddress64 was called.");
}
Result QueryIoMapping64(ams::svc::Address *out_address, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
Result QueryIoMapping64(ams::svc::Address *out_address, ams::svc::Size *out_size, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
static_assert(sizeof(*out_address) == sizeof(uintptr_t));
static_assert(sizeof(*out_size) == sizeof(size_t));
return QueryIoMapping(reinterpret_cast<uintptr_t *>(out_address), reinterpret_cast<size_t *>(out_size), physical_address, size);
}
Result LegacyQueryIoMapping64(ams::svc::Address *out_address, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
static_assert(sizeof(*out_address) == sizeof(uintptr_t));
return QueryIoMapping(reinterpret_cast<uintptr_t *>(out_address), nullptr, physical_address, size);
}
@ -104,7 +110,13 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcQueryPhysicalAddress64From32 was called.");
}
Result QueryIoMapping64From32(ams::svc::Address *out_address, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
Result QueryIoMapping64From32(ams::svc::Address *out_address, ams::svc::Size *out_size, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
static_assert(sizeof(*out_address) == sizeof(uintptr_t));
static_assert(sizeof(*out_size) == sizeof(size_t));
return QueryIoMapping(reinterpret_cast<uintptr_t *>(out_address), reinterpret_cast<size_t *>(out_size), physical_address, size);
}
Result LegacyQueryIoMapping64From32(ams::svc::Address *out_address, ams::svc::PhysicalAddress physical_address, ams::svc::Size size) {
static_assert(sizeof(*out_address) == sizeof(uintptr_t));
return QueryIoMapping(reinterpret_cast<uintptr_t *>(out_address), nullptr, physical_address, size);
}

8
libraries/libmesosphere/source/svc/kern_svc_debug.cpp
View file

@ -47,6 +47,10 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcContinueDebugEvent64 was called.");
}
Result LegacyContinueDebugEvent64(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
MESOSPHERE_PANIC("Stubbed SvcLegacyContinueDebugEvent64 was called.");
}
Result GetDebugThreadContext64(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
MESOSPHERE_PANIC("Stubbed SvcGetDebugThreadContext64 was called.");
}
@ -97,6 +101,10 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcContinueDebugEvent64From32 was called.");
}
Result LegacyContinueDebugEvent64From32(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
MESOSPHERE_PANIC("Stubbed SvcLegacyContinueDebugEvent64From32 was called.");
}
Result GetDebugThreadContext64From32(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
MESOSPHERE_PANIC("Stubbed SvcGetDebugThreadContext64From32 was called.");
}

20
libraries/libvapours/include/vapours/svc/svc_definitions.hpp
View file

@ -107,7 +107,7 @@
HANDLER(0x52, Result, UnmapTransferMemory, INPUT(::ams::svc::Handle, trmem_handle), INPUT(::ams::svc::Address, address), INPUT(::ams::svc::Size, size)) \
HANDLER(0x53, Result, CreateInterruptEvent, OUTPUT(::ams::svc::Handle, out_read_handle), INPUT(int32_t, interrupt_id), INPUT(::ams::svc::InterruptType, interrupt_type)) \
HANDLER(0x54, Result, QueryPhysicalAddress, OUTPUT(::ams::svc::NAMESPACE::PhysicalMemoryInfo, out_info), INPUT(::ams::svc::Address, address)) \
HANDLER(0x55, Result, QueryIoMapping, OUTPUT(::ams::svc::Address, out_address), INPUT(::ams::svc::PhysicalAddress, physical_address), INPUT(::ams::svc::Size, size)) \
HANDLER(0x55, Result, QueryIoMapping, OUTPUT(::ams::svc::Address, out_address), OUTPUT(::ams::svc::Size, out_size), INPUT(::ams::svc::PhysicalAddress, physical_address), INPUT(::ams::svc::Size, size)) \
HANDLER(0x56, Result, CreateDeviceAddressSpace, OUTPUT(::ams::svc::Handle, out_handle), INPUT(uint64_t, das_address), INPUT(uint64_t, das_size)) \
HANDLER(0x57, Result, AttachDeviceAddressSpace, INPUT(::ams::svc::DeviceName, device_name), INPUT(::ams::svc::Handle, das_handle)) \
HANDLER(0x58, Result, DetachDeviceAddressSpace, INPUT(::ams::svc::DeviceName, device_name), INPUT(::ams::svc::Handle, das_handle)) \
@ -149,7 +149,10 @@
HANDLER(0x7C, Result, GetProcessInfo, OUTPUT(int64_t, out_info), INPUT(::ams::svc::Handle, process_handle), INPUT(::ams::svc::ProcessInfoType, info_type)) \
HANDLER(0x7D, Result, CreateResourceLimit, OUTPUT(::ams::svc::Handle, out_handle)) \
HANDLER(0x7E, Result, SetResourceLimitLimitValue, INPUT(::ams::svc::Handle, resource_limit_handle), INPUT(::ams::svc::LimitableResource, which), INPUT(int64_t, limit_value)) \
HANDLER(0x7F, void, CallSecureMonitor, OUTPUT(::ams::svc::NAMESPACE::SecureMonitorArguments, args))
HANDLER(0x7F, void, CallSecureMonitor, OUTPUT(::ams::svc::NAMESPACE::SecureMonitorArguments, args)) \
\
HANDLER(0x55, Result, LegacyQueryIoMapping, OUTPUT(::ams::svc::Address, out_address), INPUT(::ams::svc::PhysicalAddress, physical_address), INPUT(::ams::svc::Size, size)) \
HANDLER(0x64, Result, LegacyContinueDebugEvent, INPUT(::ams::svc::Handle, debug_handle), INPUT(uint32_t, flags), INPUT(uint64_t, thread_id))
#define AMS_SVC_FOREACH_USER_DEFINITION(HANDLER, NAMESPACE) AMS_SVC_FOREACH_DEFINITION_IMPL(HANDLER, NAMESPACE, AMS_SVC_USER_INPUT_HANDLER, AMS_SVC_USER_OUTPUT_HANDLER, AMS_SVC_USER_INPTR_HANDLER, AMS_SVC_USER_OUTPTR_HANDLER)
#define AMS_SVC_FOREACH_KERN_DEFINITION(HANDLER, NAMESPACE) AMS_SVC_FOREACH_DEFINITION_IMPL(HANDLER, NAMESPACE, AMS_SVC_KERN_INPUT_HANDLER, AMS_SVC_KERN_OUTPUT_HANDLER, AMS_SVC_KERN_INPTR_HANDLER, AMS_SVC_KERN_OUTPTR_HANDLER)
@ -157,6 +160,19 @@
#define AMS_SVC_DECLARE_FUNCTION_PROTOTYPE(ID, RETURN_TYPE, NAME, ...) \
RETURN_TYPE NAME(__VA_ARGS__);
namespace ams::svc {
#define AMS_SVC_DEFINE_ID_ENUM_MEMBER(ID, RETURN_TYPE, NAME, ...) \
SvcId_##NAME = ID,
enum SvcId : u32 {
AMS_SVC_FOREACH_KERN_DEFINITION(AMS_SVC_DEFINE_ID_ENUM_MEMBER, _)
};
#undef AMS_SVC_DEFINE_ID_ENUM_MEMBER
}
#ifdef ATMOSPHERE_IS_STRATOSPHERE
namespace ams::svc {

17
mesosphere/build_mesosphere.py
View file

@ -2,19 +2,8 @@
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 atmosphere_target_firmware(major, minor, micro, rev = 0):
return (major << 24) | (minor << 16) | (micro << 8) | rev
def align_up(val, algn):
val += algn - 1
@ -50,7 +39,7 @@ def main(argc, argv):
with open('mesosphere.bin', 'wb') as f:
f.write(kernel[:kernel_metadata_offset + 4])
f.write(pk('<QQI', embedded_ini_offset, kernel_ldr_offset, ATMOSPHERE_TARGET_FIRMWARE_1000))
f.write(pk('<QQI', embedded_ini_offset, kernel_ldr_offset, atmosphere_target_firmware(10, 1, 0)))
f.write(kernel[kernel_metadata_offset + 0x18:])
f.seek(embedded_ini_offset)
f.write(embedded_ini)

2
mesosphere/kernel_ldr/source/kern_init_loader.cpp
View file

@ -318,6 +318,8 @@ namespace ams::kern::init::loader {
Elf::ApplyRelocations(GetInteger(virtual_base_address), kernel_dynamic);
/* Call the kernel's init array functions. */
/* NOTE: The kernel does this after reprotecting .rodata, but we do it before. */
/* This allows our global constructors to edit .rodata, which is valuable for editing the SVC tables to support older firmwares' ABIs. */
Elf::CallInitArrayFuncs(GetInteger(virtual_base_address) + init_array_offset, GetInteger(virtual_base_address) + init_array_end_offset);
/* Reprotect .rodata as R-- */