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Use a custom heap for the relocator and modules

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This commit is contained in:
Maschell 2021-02-19 10:05:02 +01:00
parent 18b1b25160
commit 5f9e2f8725
6 changed files with 109 additions and 76 deletions
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38
relocator/src/entry.cpp
View File

@ -7,6 +7,7 @@
#include <nsysnet/socket.h>
#include <map>
#include <algorithm>
#include <coreinit/memexpheap.h>
#include "../../source/module/RelocationData.h"
#include "../../source/module/ModuleData.h"
#include "ModuleDataPersistence.h"
@ -14,7 +15,9 @@
#include "utils/dynamic.h"
#include "globals.h"
#include "hooks.h"
#include "utils/memory.h"
MEMHeapHandle gHeapHandle __attribute__((section(".data"))) = nullptr;
uint8_t gFunctionsPatched __attribute__((section(".data"))) = 0;
uint8_t gInitCalled __attribute__((section(".data"))) = 0;
@ -25,6 +28,13 @@ extern "C" void doStart(int argc, char **argv);
// The compiler tries to optimize this otherwise and calling the main function earlier
extern "C" int _start(int argc, char **argv) {
InitFunctionPointers();
static uint8_t ucSetupRequired = 1;
if (ucSetupRequired) {
gHeapHandle = MEMCreateExpHeapEx((void *) (MEMORY_REGION_USABLE_HEAP_START), MEMORY_REGION_USABLE_HEAP_END - MEMORY_REGION_USABLE_HEAP_START, 0);
ucSetupRequired = 0;
}
socket_lib_init();
log_init();
@ -34,7 +44,7 @@ extern "C" int _start(int argc, char **argv) {
return ((int (*)(int, char **)) (*(unsigned int *) 0x1005E040))(argc, argv);
}
bool doRelocation(std::vector<RelocationData> &relocData, relocation_trampolin_entry_t *tramp_data, uint32_t tramp_length) {
bool doRelocation(std::vector<RelocationData> &relocData, relocation_trampolin_entry_t *tramp_data, uint32_t tramp_length, bool skipAllocReplacement) {
std::map<std::string, OSDynLoad_Module> moduleCache;
for (auto const &curReloc : relocData) {
std::string functionName = curReloc.getName();
@ -52,6 +62,16 @@ bool doRelocation(std::vector<RelocationData> &relocData, relocation_trampolin_e
}
}
if (!skipAllocReplacement) {
if (functionName == "MEMAllocFromDefaultHeap") {
functionAddress = reinterpret_cast<uint32_t>(&MEMAlloc);
} else if (functionName == "MEMAllocFromDefaultHeapEx") {
functionAddress = reinterpret_cast<uint32_t>(&MEMAllocEx);
} else if (functionName == "MEMFreeToDefaultHeap") {
functionAddress = reinterpret_cast<uint32_t>(&MEMFree);
}
}
if (functionAddress == 0) {
int32_t isData = curReloc.getImportRPLInformation().isData();
OSDynLoad_Module rplHandle = nullptr;
@ -87,14 +107,21 @@ bool doRelocation(std::vector<RelocationData> &relocData, relocation_trampolin_e
return true;
}
bool ResolveRelocations(std::vector<ModuleData> &loadedModules) {
bool ResolveRelocations(std::vector<ModuleData> &loadedModules, bool skipMemoryMappingModule) {
bool wasSuccessful = true;
for (auto &curModule : loadedModules) {
DEBUG_FUNCTION_LINE("Let's do the relocations for %s\n", curModule.getExportName().c_str());
if (wasSuccessful) {
std::vector<RelocationData> relocData = curModule.getRelocationDataList();
if (!doRelocation(relocData, gModuleData->trampolines, DYN_LINK_TRAMPOLIN_LIST_LENGTH)) {
// On first usage we can't redirect the alloc functions to our custom heap
// because threads can't run it on it. In order to patch the kernel
// to fully support our memory region, we have to run the FunctionPatcher and MemoryMapping
// once with the default heap. Afterwards we can just rely on the custom heap.
bool skipAllocFunction = skipMemoryMappingModule && (curModule.getExportName() == "homebrew_memorymapping" || curModule.getExportName() == "homebrew_functionpatcher");
DEBUG_FUNCTION_LINE("Skip alloc replace? %d\n", skipAllocFunction);
if (!doRelocation(relocData, gModuleData->trampolines, DYN_LINK_TRAMPOLIN_LIST_LENGTH, skipAllocFunction)) {
DEBUG_FUNCTION_LINE("FAIL\n");
wasSuccessful = false;
curModule.relocationsDone = false;
@ -124,7 +151,6 @@ extern "C" void doStart(int argc, char **argv) {
std::vector<ModuleData> loadedModulesUnordered = ModuleDataPersistence::loadModuleData(gModuleData);
std::vector<ModuleData> loadedModules = OrderModulesByDependencies(loadedModulesUnordered);
bool applicationEndHookLoaded = false;
for (auto &curModule : loadedModules) {
if (curModule.getExportName() == "homebrew_applicationendshook") {
@ -150,7 +176,7 @@ extern "C" void doStart(int argc, char **argv) {
gInitCalled = 1;
DEBUG_FUNCTION_LINE("Resolve relocations without replacing alloc functions\n");
ResolveRelocations(loadedModules);
ResolveRelocations(loadedModules, true);
for (auto &curModule : loadedModules) {
if (curModule.isInitBeforeRelocationDoneHook()) {
@ -181,7 +207,7 @@ extern "C" void doStart(int argc, char **argv) {
}
} else {
DEBUG_FUNCTION_LINE("Resolve relocations and replace alloc functions\n");
ResolveRelocations(loadedModules);
ResolveRelocations(loadedModules, false);
CallHook(loadedModules, WUMS_HOOK_RELOCATIONS_DONE);
}
CallHook(loadedModules, WUMS_HOOK_INIT_WUT);

11
relocator/src/utils/dynamic.c
View File

@ -15,11 +15,6 @@
#define IMPORT_BEGIN(lib) do{if(OSDynLoad_IsModuleLoaded(#lib ".rpl", &handle) != OS_DYNLOAD_OK) OSFatal(#lib ".rpl is not loaded");} while(0)
#define IMPORT_END()
#define EXPORT_VAR(type, var) type var __attribute__((section(".data")));
EXPORT_VAR(uint32_t *, pMEMAllocFromDefaultHeapEx);
EXPORT_VAR(uint32_t *, pMEMAllocFromDefaultHeap);
EXPORT_VAR(uint32_t *, pMEMFreeToDefaultHeap);
void InitFunctionPointers(void) {
OSDynLoad_Module handle;
@ -27,12 +22,6 @@ void InitFunctionPointers(void) {
addr_OSDynLoad_FindExport = (void *) 0x0102B828; // 0200f428 - 0xFE3C00
addr_OSDynLoad_IsModuleLoaded = (void *) 0x0102A59C; // 0200e19c - 0xFE3C00
IMPORT_BEGIN(coreinit);
OSDynLoad_FindExport(handle, 1, "MEMAllocFromDefaultHeapEx", (void **) &pMEMAllocFromDefaultHeapEx);
OSDynLoad_FindExport(handle, 1, "MEMAllocFromDefaultHeap", (void **) &pMEMAllocFromDefaultHeap);
OSDynLoad_FindExport(handle, 1, "MEMFreeToDefaultHeap", (void **) &pMEMFreeToDefaultHeap);
IMPORT_END()
#include "imports.h"
}

6
relocator/src/utils/imports.h
View File

@ -11,6 +11,12 @@ IMPORT(MEMGetSizeForMBlockExpHeap);
IMPORT(OSSleepTicks);
IMPORT(OSEffectiveToPhysical);
IMPORT(OSFatal);
IMPORT(MEMFreeToExpHeap);
IMPORT(MEMAllocFromExpHeapEx);
IMPORT(MEMGetAllocatableSizeForExpHeapEx);
IMPORT(MEMCreateExpHeapEx);
IMPORT(OSUninterruptibleSpinLock_Acquire);
IMPORT(OSUninterruptibleSpinLock_Release);
IMPORT_END();

72
relocator/src/utils/memory.c → relocator/src/utils/memory.cpp
View File

@ -17,19 +17,69 @@
#include <coreinit/memexpheap.h>
#include <coreinit/memdefaultheap.h>
#include <coreinit/memorymap.h>
#include <coreinit/cache.h>
#include <malloc.h>
#include <string.h>
#include <errno.h>
#include "logger.h"
extern uint32_t *pMEMAllocFromDefaultHeapEx;
extern uint32_t *pMEMAllocFromDefaultHeap;
extern uint32_t *pMEMFreeToDefaultHeap;
extern MEMHeapHandle gHeapHandle;
void *MEMAllocSafe(uint32_t size, uint32_t align) {
void *res = nullptr;
MEMHeapHandle heapHandle = gHeapHandle;
MEMExpHeap *heap = (MEMExpHeap *) heapHandle;
OSUninterruptibleSpinLock_Acquire(&heap->header.lock);
res = MEMAllocFromExpHeapEx(heapHandle, size, align);
auto cur = heap->usedList.head;
while (cur != nullptr) {
DCFlushRange(cur, sizeof(MEMExpHeapBlock));
cur = cur->next;
}
cur = heap->freeList.head;
while (cur != nullptr) {
DCFlushRange(cur, sizeof(MEMExpHeapBlock));
cur = cur->next;
}
OSUninterruptibleSpinLock_Release(&heap->header.lock);
return res;
}
void *MemoryAlloc(uint32_t size) {
void *res = MEMAllocSafe(size, 4);
if (res == nullptr) {
OSFatal_printf("Failed to MemoryAlloc %d", size);
}
return res;
}
void *MemoryAllocEx(uint32_t size, uint32_t align) {
void *res = MEMAllocSafe(size, align);
if (res == nullptr) {
OSFatal_printf("Failed to MemoryAllocEX %d %d", size, align);
}
return res;
}
void MemoryFree(void *ptr) {
if (ptr) {
MEMFreeToExpHeap(gHeapHandle, ptr);
} else {
OSFatal_printf("Failed to free");
}
}
uint32_t MEMAlloc __attribute__((__section__ (".data"))) = (uint32_t) MemoryAlloc;
uint32_t MEMAllocEx __attribute__((__section__ (".data"))) = (uint32_t) MemoryAllocEx;
uint32_t MEMFree __attribute__((__section__ (".data"))) = (uint32_t) MemoryFree;
//!-------------------------------------------------------------------------------------------
//! reent versions
//!-------------------------------------------------------------------------------------------
void *_malloc_r(struct _reent *r, size_t size) {
void *ptr = ((void *(*)(size_t)) (*pMEMAllocFromDefaultHeap))(size);
void *ptr = MemoryAllocEx(size, 4);
if (!ptr) {
r->_errno = ENOMEM;
}
@ -37,7 +87,7 @@ void *_malloc_r(struct _reent *r, size_t size) {
}
void *_calloc_r(struct _reent *r, size_t num, size_t size) {
void *ptr = ((void *(*)(size_t)) (*pMEMAllocFromDefaultHeap))(size);
void *ptr = MemoryAllocEx(num * size, 4);
if (ptr) {
memset(ptr, 0, num * size);
} else {
@ -48,17 +98,17 @@ void *_calloc_r(struct _reent *r, size_t num, size_t size) {
}
void *_memalign_r(struct _reent *r, size_t align, size_t size) {
return ((void *(*)(size_t, size_t)) (*pMEMAllocFromDefaultHeapEx))(size, align);
return MemoryAllocEx(size, align);
}
void _free_r(struct _reent *r, void *ptr) {
if (ptr) {
((void (*)(void *)) (*pMEMFreeToDefaultHeap))(ptr);
MemoryFree(ptr);
}
}
void *_realloc_r(struct _reent *r, void *p, size_t size) {
void *new_ptr = ((void *(*)(size_t)) (*pMEMAllocFromDefaultHeap))(size);
void *new_ptr = MemoryAllocEx(size, 4);
if (!new_ptr) {
r->_errno = ENOMEM;
return new_ptr;
@ -67,7 +117,7 @@ void *_realloc_r(struct _reent *r, void *p, size_t size) {
if (p) {
size_t old_size = MEMGetSizeForMBlockExpHeap(p);
memcpy(new_ptr, p, old_size <= size ? old_size : size);
((void (*)(void *)) (*pMEMFreeToDefaultHeap))(p);
MemoryFree(p);
}
return new_ptr;
}
@ -93,12 +143,12 @@ _malloc_usable_size_r(struct _reent *r, void *ptr) {
void *
_valloc_r(struct _reent *r, size_t size) {
return ((void *(*)(size_t, size_t)) (*pMEMAllocFromDefaultHeapEx))(size, OS_PAGE_SIZE);
return MemoryAllocEx(size, OS_PAGE_SIZE);
}
void *
_pvalloc_r(struct _reent *r, size_t size) {
return ((void *(*)(size_t, size_t)) (*pMEMAllocFromDefaultHeapEx))((size + (OS_PAGE_SIZE - 1)) & ~(OS_PAGE_SIZE - 1), OS_PAGE_SIZE);
return MemoryAllocEx((size + (OS_PAGE_SIZE - 1)) & ~(OS_PAGE_SIZE - 1), OS_PAGE_SIZE);
}
int

49
relocator/src/utils/memory.h
View File

@ -1,46 +1,5 @@
/****************************************************************************
* Copyright (C) 2015 Dimok
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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/>.
****************************************************************************/
#ifndef __MEMORY_H_
#define __MEMORY_H_
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
#include <malloc.h>
void memoryInitialize(void);
void memoryRelease(void);
void *MEM2_alloc(u32 size, u32 align);
void MEM2_free(void *ptr);
void *MEM1_alloc(u32 size, u32 align);
void MEM1_free(void *ptr);
void *MEMBucket_alloc(u32 size, u32 align);
void MEMBucket_free(void *ptr);
#ifdef __cplusplus
}
#endif
#endif // __MEMORY_H_
extern uint32_t MEMAlloc;
extern uint32_t MEMAllocEx;
extern uint32_t MEMFree;

5
source/globals.h
View File

@ -5,7 +5,10 @@
#define MEMORY_REGION_START 0x00800000
#define MEMORY_REGION_SIZE 0x00800000
#define MEMORY_REGION_USABLE_START MEMORY_REGION_START + 0x00080000
#define MEMORY_REGION_USABLE_HEAP_START (MEMORY_REGION_START + 0x00080000)
#define MEMORY_REGION_USABLE_HEAP_END (MEMORY_REGION_USABLE_HEAP_START + 0x00100000)
#define MEMORY_REGION_USABLE_START MEMORY_REGION_USABLE_HEAP_END
#define MEMORY_REGION_USABLE_END 0x00FFF000
#define gModuleData ((module_information_t *) (MEMORY_REGION_USABLE_START))