mirrors/Atmosphere
1
0
Fork 0
mirror of https://github.com/Atmosphere-NX/Atmosphere.git synced 2025-05-30 14:35:17 -04:00
Code Issues Projects Releases Packages Wiki Activity

mesosphere: Implement kernelldr through first page table mapping

Browse source
This commit is contained in:
Michael Scire 2019-12-13 01:21:43 -08:00 • committed by SciresM
parent b5becba8ff
commit 2866cb5fe6
24 changed files with 1520 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

82
libraries/libmesosphere/source/arch/arm64/init/kern_init_elf64.cpp Normal file
View file

@ -0,0 +1,82 @@
/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::init::Elf::Elf64 {
/* API to apply relocations or call init array. */
void ApplyRelocations(uintptr_t base_address, const Dyn *dynamic) {
uintptr_t dyn_rel = 0;
uintptr_t dyn_rela = 0;
uintptr_t rel_count = 0;
uintptr_t rela_count = 0;
uintptr_t rel_ent = 0;
uintptr_t rela_ent = 0;
/* Iterate over all tags, identifying important extents. */
for (const Dyn *cur_entry = dynamic; cur_entry->GetTag() != DT_NULL; cur_entry++) {
switch (cur_entry->GetTag()) {
case DT_REL:
dyn_rel = base_address + cur_entry->GetPtr();
break;
case DT_RELA:
dyn_rela = base_address + cur_entry->GetPtr();
break;
case DT_RELENT:
rel_ent = cur_entry->GetValue();
break;
case DT_RELAENT:
rela_ent = cur_entry->GetValue();
break;
case DT_RELCOUNT:
rel_count = cur_entry->GetValue();
break;
case DT_RELACOUNT:
rela_count = cur_entry->GetValue();
break;
}
}
/* Apply all Rel relocations */
for (size_t i = 0; i < rel_count; i++) {
const auto &rel = *reinterpret_cast<const Elf64::Rel *>(dyn_rel + rel_ent * i);
/* Only allow R_AARCH64_RELATIVE relocations. */
while (rel.GetType() != R_AARCH64_RELATIVE) { /* ... */ }
/* Apply the relocation. */
Elf64::Addr *target_address = reinterpret_cast<Elf64::Addr *>(base_address + rel.GetOffset());
*target_address += base_address;
}
/* Apply all Rela relocations. */
for (size_t i = 0; i < rela_count; i++) {
const auto &rela = *reinterpret_cast<const Elf64::Rela *>(dyn_rela + rela_ent * i);
/* Only allow R_AARCH64_RELATIVE relocations. */
while (rela.GetType() != R_AARCH64_RELATIVE) { /* ... */ }
/* Apply the relocation. */
Elf64::Addr *target_address = reinterpret_cast<Elf64::Addr *>(base_address + rela.GetOffset());
*target_address = base_address + rela.GetAddend();
}
}
void CallInitArrayFuncs(uintptr_t init_array_start, uintptr_t init_array_end) {
}
}

84
libraries/libmesosphere/source/arch/arm64/kern_init_elf64.cpp Normal file
View file

@ -0,0 +1,84 @@
/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::init::Elf::Elf64 {
/* API to apply relocations or call init array. */
void ApplyRelocations(uintptr_t base_address, const Dyn *dynamic) {
uintptr_t dyn_rel = 0;
uintptr_t dyn_rela = 0;
uintptr_t rel_count = 0;
uintptr_t rela_count = 0;
uintptr_t rel_ent = 0;
uintptr_t rela_ent = 0;
/* Iterate over all tags, identifying important extents. */
for (const Dyn *cur_entry = dynamic; cur_entry->GetTag() != DT_NULL; cur_entry++) {
switch (cur_entry->GetTag()) {
case DT_REL:
dyn_rel = base_address + cur_entry->GetPtr();
break;
case DT_RELA:
dyn_rela = base_address + cur_entry->GetPtr();
break;
case DT_RELENT:
rel_ent = cur_entry->GetValue();
break;
case DT_RELAENT:
rela_ent = cur_entry->GetValue();
break;
case DT_RELCOUNT:
rel_count = cur_entry->GetValue();
break;
case DT_RELACOUNT:
rela_count = cur_entry->GetValue();
break;
}
}
/* Apply all Rel relocations */
for (size_t i = 0; i < rel_count; i++) {
const auto &rel = *reinterpret_cast<const Elf64::Rel *>(dyn_rel + rel_ent * i);
/* Only allow R_AARCH64_RELATIVE relocations. */
while (rel.GetType() != R_AARCH64_RELATIVE) { /* ... */ }
/* Apply the relocation. */
Elf64::Addr *target_address = reinterpret_cast<Elf64::Addr *>(base_address + rel.GetOffset());
*target_address += base_address;
}
/* Apply all Rela relocations. */
for (size_t i = 0; i < rela_count; i++) {
const auto &rela = *reinterpret_cast<const Elf64::Rela *>(dyn_rela + rela_ent * i);
/* Only allow R_AARCH64_RELATIVE relocations. */
while (rela.GetType() != R_AARCH64_RELATIVE) { /* ... */ }
/* Apply the relocation. */
Elf64::Addr *target_address = reinterpret_cast<Elf64::Addr *>(base_address + rela.GetOffset());
*target_address = base_address + rela.GetAddend();
}
}
void CallInitArrayFuncs(uintptr_t init_array_start, uintptr_t init_array_end) {
for (uintptr_t cur_entry = init_array_start; cur_entry < init_array_end; cur_entry += sizeof(void *)) {
(*(void (**)())(cur_entry))();
}
}
}

58
libraries/libmesosphere/source/board/nintendo/switch/kern_k_system_control.cpp
View file

@ -18,8 +18,64 @@
namespace ams::kern {
namespace {
/* Convenience definitions. */
constexpr size_t FourGigabytes = 0x100000000ul;
constexpr size_t SixGigabytes = 0x180000000ul;
constexpr size_t EightGigabytes = 0x200000000ul;
size_t GetRealMemorySize() {
/* TODO: Move this into a header for the MC in general. */
constexpr u32 MemoryControllerConfigurationRegister = 0x70019050;
u32 config_value;
MESOSPHERE_ABORT_UNLESS(smc::ReadWriteRegister(&config_value, MemoryControllerConfigurationRegister, 0, 0));
return static_cast<size_t>(config_value & 0x3FFF) << 20;
}
inline u64 GetKernelConfiguration() {
u64 value = 0;
smc::GetConfig(&value, 1, smc::ConfigItem::KernelConfiguration);
return value;
}
inline smc::MemoryMode GetMemoryMode() {
return static_cast<smc::MemoryMode>((GetKernelConfiguration() >> 10) & 0x3);
}
size_t GetIntendedMemorySize() {
const smc::MemoryMode memory_mode = GetMemoryMode();
switch (memory_mode) {
case smc::MemoryMode_4GB:
default: /* All invalid modes should go to 4GB. */
return FourGigabytes;
case smc::MemoryMode_6GB:
return SixGigabytes;
case smc::MemoryMode_8GB:
return EightGigabytes;
}
}
}
/* Initialization. */
KPhysicalAddress KSystemControl::GetKernelPhysicalBaseAddress(uintptr_t base_address) {
const size_t real_dram_size = GetRealMemorySize();
const size_t intended_dram_size = GetIntendedMemorySize();
if (intended_dram_size * 2 < real_dram_size) {
return base_address;
} else {
return base_address + ((real_dram_size - intended_dram_size) / 2);
}
}
bool KSystemControl::ShouldIncreaseResourceRegionSize() {
return (GetKernelConfiguration() >> 3) & 1;
}
void KSystemControl::StopSystem() {
/* TODO: smc::Panic(0xF00); */
/* Display a panic screen via exosphere. */
smc::Panic(0xF00);
while (true) { /* ... */ }
}

96
libraries/libmesosphere/source/board/nintendo/switch/kern_secure_monitor.cpp Normal file
View file

@ -0,0 +1,96 @@
/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
#include "kern_secure_monitor.hpp"
namespace ams::kern::smc {
namespace {
struct SecureMonitorArguments {
u64 x[8];
};
enum FunctionId : u32 {
FunctionId_CpuSuspend = 0xC4000001,
FunctionId_CpuOff = 0x84000002,
FunctionId_CpuOn = 0xC4000003,
FunctionId_GetConfig = 0xC3000004,
FunctionId_GenerateRandomBytes = 0xC3000005,
FunctionId_Panic = 0xC3000006,
FunctionId_ConfigureCarveout = 0xC3000007,
FunctionId_ReadWriteRegister = 0xC3000008,
};
void CallPrivilegedSecureMonitorFunction(SecureMonitorArguments &args) {
/* Load arguments into registers. */
register u64 x0 asm("x0") = args.x[0];
register u64 x1 asm("x1") = args.x[1];
register u64 x2 asm("x2") = args.x[2];
register u64 x3 asm("x3") = args.x[3];
register u64 x4 asm("x4") = args.x[4];
register u64 x5 asm("x5") = args.x[5];
register u64 x6 asm("x6") = args.x[6];
register u64 x7 asm("x7") = args.x[7];
/* Actually make the call. */
{
/* Disable interrupts while making the call. */
KScopedInterruptDisable intr_disable;
__asm__ __volatile__("smc #1"
: "+r"(x0), "+r"(x1), "+r"(x2), "+r"(x3), "+r"(x4), "+r"(x5), "+r"(x6), "+r"(x7)
:
: "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "cc", "memory"
);
/* TODO: Restore X18 */
}
/* Store arguments to output. */
args.x[0] = x0;
args.x[1] = x1;
args.x[2] = x2;
args.x[3] = x3;
args.x[4] = x4;
args.x[5] = x5;
args.x[6] = x6;
args.x[7] = x7;
}
}
void GetConfig(u64 *out, size_t num_qwords, ConfigItem config_item) {
SecureMonitorArguments args = { FunctionId_GetConfig, static_cast<u32>(config_item) };
CallPrivilegedSecureMonitorFunction(args);
MESOSPHERE_ABORT_UNLESS((static_cast<SmcResult>(args.x[0]) == SmcResult::Success));
for (size_t i = 0; i < num_qwords && i < 7; i++) {
out[i] = args.x[1 + i];
}
}
void NORETURN Panic(u32 color) {
SecureMonitorArguments args = { FunctionId_Panic, color };
CallPrivilegedSecureMonitorFunction(args);
while (true) { /* ... */ }
}
bool ReadWriteRegister(u32 *out, u64 address, u32 mask, u32 value) {
SecureMonitorArguments args = { FunctionId_ReadWriteRegister, address, mask, value };
CallPrivilegedSecureMonitorFunction(args);
*out = args.x[1];
return static_cast<SmcResult>(args.x[0]) == SmcResult::Success;
}
}

50
libraries/libmesosphere/source/board/nintendo/switch/kern_secure_monitor.hpp
View file

@ -18,6 +18,54 @@
namespace ams::kern::smc {
/* TODO: Secure Monitor API. */
/* Types. */
enum MemoryMode {
MemoryMode_4GB = 0,
MemoryMode_6GB = 1,
MemoryMode_8GB = 2,
};
enum class ConfigItem : u32 {
/* Standard config items. */
DisableProgramVerification = 1,
DramId = 2,
SecurityEngineIrqNumber = 3,
Version = 4,
HardwareType = 5,
IsRetail = 6,
IsRecoveryBoot = 7,
DeviceId = 8,
BootReason = 9,
MemoryArrange = 10,
IsDebugMode = 11,
KernelConfiguration = 12,
IsChargerHiZModeEnabled = 13,
IsKiosk = 14,
NewHardwareType = 15,
NewKeyGeneration = 16,
Package2Hash = 17,
/* Extension config items for exosphere. */
ExosphereApiVersion = 65000,
ExosphereNeedsReboot = 65001,
ExosphereNeedsShutdown = 65002,
ExosphereGitCommitHash = 65003,
ExosphereHasRcmBugPatch = 65004,
};
enum class SmcResult {
Success = 0,
NotImplemented = 1,
InvalidArgument = 2,
InProgress = 3,
NoAsyncOperation = 4,
InvalidAsyncOperation = 5,
NotPermitted = 6,
};
/* TODO: Rest of Secure Monitor API. */
void GetConfig(u64 *out, size_t num_qwords, ConfigItem config_item);
void NORETURN Panic(u32 color);
bool ReadWriteRegister(u32 *out, u64 address, u32 mask, u32 value);
}

36
libraries/libmesosphere/source/kern_k_scoped_interrupt.cpp Normal file
View file

@ -0,0 +1,36 @@
/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern {
WEAK_SYMBOL KScopedInterruptDisable::KScopedInterruptDisable() {
/* TODO: Disable interrupts. */
}
WEAK_SYMBOL KScopedInterruptDisable::~KScopedInterruptDisable() {
/* TODO: un-disable interrupts. */
}
WEAK_SYMBOL KScopedInterruptEnable::KScopedInterruptEnable() {
/* TODO: Enable interrupts. */
}
WEAK_SYMBOL KScopedInterruptEnable::~KScopedInterruptEnable() {
/* TODO: un-enable interrupts. */
}
}