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Exzap 2022-08-22 22:21:23 +02:00
parent e3db07a16a
commit d60742f52b
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129
src/Cafe/OS/RPL/elf.cpp Normal file
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#include <zlib.h>
#include "Cafe/OS/RPL/rpl.h"
#include "Cafe/OS/RPL/rpl_structs.h"
#include "util/VirtualHeap/VirtualHeap.h"
#include "Cafe/HW/Espresso/Recompiler/PPCRecompiler.h"
#include "Cafe/HW/Espresso/Debugger/Debugger.h"
typedef struct
{
/* +0x00 */ uint32be magic;
/* +0x04 */ uint8 eiClass;
/* +0x05 */ uint8 eiData;
/* +0x06 */ uint8 eiVersion;
/* +0x07 */ uint8 eiOSABI;
/* +0x08 */ uint8 eiOSABIVersion;
/* +0x09 */ uint8 eiPadding[7];
/* +0x10 */ uint16be eType;
/* +0x12 */ uint16be eMachine;
/* +0x14 */ uint32be eVersion;
/* +0x18 */ uint32be entrypoint;
/* +0x1C */ uint32be phOffset;
/* +0x20 */ uint32be shOffset;
/* +0x24 */ uint32be eFlags;
/* +0x28 */ uint16be eHeaderSize;
/* +0x2A */ uint16be ePHEntrySize;
/* +0x2C */ uint16be ePHNum;
/* +0x2E */ uint16be eSHEntrySize;
/* +0x30 */ uint16be eSHNum;
/* +0x32 */ uint16be eShStrIndex;
}elfHeader_t;
static_assert(sizeof(elfHeader_t) == 0x34, "");
typedef struct
{
/* +0x00 */ uint32be nameOffset;
/* +0x04 */ uint32be shType;
/* +0x08 */ uint32be shFlags;
/* +0x0C */ uint32be shAddr;
/* +0x10 */ uint32be shOffset;
/* +0x14 */ uint32be shSize;
/* +0x18 */ uint32be shLink;
/* +0x1C */ uint32be shInfo;
/* +0x20 */ uint32be shAddrAlign;
/* +0x24 */ uint32be shEntSize;
}elfSectionEntry_t;
static_assert(sizeof(elfSectionEntry_t) == 0x28, "");
// Map elf into memory
uint32 ELF_LoadFromMemory(uint8* elfData, sint32 size, const char* name)
{
elfHeader_t* header = (elfHeader_t*)elfData;
uint32 sectionCount = header->eSHNum;
uint32 sectionTableOffset = header->shOffset;
uint32 sectionTableEntrySize = header->eSHEntrySize;
elfSectionEntry_t* sectionTable = (elfSectionEntry_t*)(elfData + (uint32)header->shOffset);
memory_enableHBLELFCodeArea();
for (uint32 i = 0; i < sectionCount; i++)
{
debug_printf("%02d Addr %08x Size %08x Offs %08x Flags %08x Type %08x EntSize %08x\n", i, (uint32)sectionTable[i].shAddr, (uint32)sectionTable[i].shSize, (uint32)sectionTable[i].shOffset, (uint32)sectionTable[i].shFlags, (uint32)sectionTable[i].shType, (uint32)sectionTable[i].shEntSize);
uint32 shAddr = (uint32)sectionTable[i].shAddr;
uint32 shSize = (uint32)sectionTable[i].shSize;
uint32 shOffset = (uint32)sectionTable[i].shOffset;
uint32 shType = (uint32)sectionTable[i].shType;
if (shOffset > (uint32)size)
{
forceLog_printf("ELF section %d out of bounds", i);
continue;
}
uint32 copySize = std::min(shSize, size - shOffset);
// 0x00802000
if (shAddr != 0)
{
if (shType == SHT_NOBITS)
{
memset(memory_getPointerFromVirtualOffset(shAddr), 0, shSize);
}
else
{
memcpy(memory_getPointerFromVirtualOffset(shAddr), elfData + shOffset, copySize);
}
// SHT_NOBITS
}
}
return header->entrypoint;
}
// From Homebrew Launcher:
//#define MEM_BASE (0x00800000)
//#define ELF_DATA_ADDR (*(volatile unsigned int*)(MEM_BASE + 0x1300 + 0x00))
//#define ELF_DATA_SIZE (*(volatile unsigned int*)(MEM_BASE + 0x1300 + 0x04))
//#define HBL_CHANNEL (*(volatile unsigned int*)(MEM_BASE + 0x1300 + 0x08))
//#define RPX_MAX_SIZE (*(volatile unsigned int*)(MEM_BASE + 0x1300 + 0x0C))
//#define RPX_MAX_CODE_SIZE (*(volatile unsigned int*)(MEM_BASE + 0x1300 + 0x10))
//#define MAIN_ENTRY_ADDR (*(volatile unsigned int*)(MEM_BASE + 0x1400 + 0x00))
//#define OS_FIRMWARE (*(volatile unsigned int*)(MEM_BASE + 0x1400 + 0x04))
//
//#define OS_SPECIFICS ((OsSpecifics*)(MEM_BASE + 0x1500))
//
//#define MEM_AREA_TABLE ((s_mem_area*)(MEM_BASE + 0x1600))
//typedef struct _OsSpecifics
//{
// unsigned int addr_OSDynLoad_Acquire;
// unsigned int addr_OSDynLoad_FindExport;
// unsigned int addr_OSTitle_main_entry;
//
// unsigned int addr_KernSyscallTbl1;
// unsigned int addr_KernSyscallTbl2;
// unsigned int addr_KernSyscallTbl3;
// unsigned int addr_KernSyscallTbl4;
// unsigned int addr_KernSyscallTbl5;
//
// int(*LiWaitIopComplete)(int, int *);
// int(*LiWaitIopCompleteWithInterrupts)(int, int *);
// unsigned int addr_LiWaitOneChunk;
// unsigned int addr_PrepareTitle_hook;
// unsigned int addr_sgIsLoadingBuffer;
// unsigned int addr_gDynloadInitialized;
// unsigned int orig_LiWaitOneChunkInstr;
//} OsSpecifics;