shadPS4/emulator/Loader/Elf.h

133 lines
3.6 KiB
C++

#pragma once
#include <string>
#include <inttypes.h>
#include "../types.h"
#include "../Core/FsFile.h"
struct self_header
{
static const u32 signature = 0x1D3D154Fu;
u32 magic;
u08 version;
u08 mode;
u08 endian;// 1 is little endian
u08 attributes;
u08 category;
u08 program_type;
u16 padding1;
u16 header_size;
u16 meta_size;
u32 file_size;
u32 padding2;
u16 segment_count;
u16 unknown1A; //always 0x22
u32 padding3;
};
struct self_segment_header
{
u64 flags;
u64 file_offset;
u64 file_size;
u64 memory_size;
};
constexpr u08 EI_MAG0 = 0;/* e_ident[] indexes */
constexpr u08 EI_MAG1 = 1;
constexpr u08 EI_MAG2 = 2;
constexpr u08 EI_MAG3 = 3;
constexpr u08 EI_CLASS = 4;
constexpr u08 EI_DATA = 5;
constexpr u08 EI_VERSION = 6;
constexpr u08 EI_OSABI = 7;
constexpr u08 EI_ABIVERSION = 8;
// Magic number
constexpr u08 ELFMAG0 = 0x7F;
constexpr u08 ELFMAG1 = 'E';
constexpr u08 ELFMAG2 = 'L';
constexpr u08 ELFMAG3 = 'F';
//other ident fields , only ps4 neccesary ones
constexpr u08 ELFCLASS64 = 2;
constexpr u08 ELFDATA2LSB = 1;
constexpr u08 ELFOSABI_FREEBSD = 9; // FreeBSD
constexpr u08 EV_CURRENT = 1;
constexpr u08 ELFABIVERSION_AMDGPU_HSA_V2 = 0;
//type fields PS4 specific
constexpr u16 ET_DYNEXEC = 0xFE10; // Executable file
constexpr u16 ET_DYNAMIC = 0xFE18; // Shared
//machine field
constexpr u16 EM_X86_64 = 62; // Advanced Micro Devices X86-64 processor
struct elf_header
{
u08 e_ident[16]; /* ELF identification */
u16 e_type; /* Object file type */
u16 e_machine; /* Machine type */
u32 e_version; /* Object file version */
u64 e_entry; /* Entry point address */
u64 e_phoff; /* Program header offset */
u64 e_shoff; /* Section header offset */
u32 e_flags; /* Processor-specific flags */
u16 e_ehsize; /* ELF header size */
u16 e_phentsize; /* Size of program header entry */
u16 e_phnum; /* Number of program header entries */
u16 e_shentsize; /* Size of section header entry */
u16 e_shnum; /* Number of section header entries */
u16 e_shstrndx; /* Section name string table index */
};
struct elf_program_header
{
u32 p_type; /* Type of segment */
u32 p_flags; /* Segment attributes */
u64 p_offset; /* Offset in file */
u64 p_vaddr; /* Virtual address in memory */
u64 p_paddr; /* Reserved */
u64 p_filesz; /* Size of segment in file */
u64 p_memsz; /* Size of segment in memory */
u64 p_align; /* Alignment of segment */
};
struct elf_section_header
{
u32 sh_name; /* Section name */
u32 sh_type; /* Section type */
u64 sh_flags; /* Section attributes */
u64 sh_addr; /* Virtual address in memory */
u64 sh_offset; /* Offset in file */
u64 sh_size; /* Size of section */
u32 sh_link; /* Link to other section */
u32 sh_info; /* Miscellaneous information */
u64 sh_addralign; /* Address alignment boundary */
u64 sh_entsize; /* Size of entries, if section has table */
};
class Elf
{
public:
Elf() = default;
virtual ~Elf();
void Open(const std::string & file_name);
bool isSelfFile() const;
bool isElfFile() const;
void DebugDump();
private:
void Reset();
FsFile* m_f = nullptr;
self_header* m_self = nullptr;
self_segment_header* m_self_segments = nullptr;
elf_header* m_elf_header = nullptr;
elf_program_header* m_elf_phdr = nullptr;
elf_section_header* m_elf_shdr = nullptr;
};