diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index adf70eb8ba..73bf626d4c 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -58,6 +58,7 @@ add_library(common STATIC div_ceil.h dynamic_library.cpp dynamic_library.h + elf.h error.cpp error.h expected.h diff --git a/src/common/elf.h b/src/common/elf.h new file mode 100644 index 0000000000..14a5e9597b --- /dev/null +++ b/src/common/elf.h @@ -0,0 +1,333 @@ +// SPDX-FileCopyrightText: 2022 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include +#include + +#include "common_types.h" + +namespace Common { +namespace ELF { + +/* Type for a 16-bit quantity. */ +using Elf32_Half = u16; +using Elf64_Half = u16; + +/* Types for signed and unsigned 32-bit quantities. */ +using Elf32_Word = u32; +using Elf32_Sword = s32; +using Elf64_Word = u32; +using Elf64_Sword = s32; + +/* Types for signed and unsigned 64-bit quantities. */ +using Elf32_Xword = u64; +using Elf32_Sxword = s64; +using Elf64_Xword = u64; +using Elf64_Sxword = s64; + +/* Type of addresses. */ +using Elf32_Addr = u32; +using Elf64_Addr = u64; + +/* Type of file offsets. */ +using Elf32_Off = u32; +using Elf64_Off = u64; + +/* Type for section indices, which are 16-bit quantities. */ +using Elf32_Section = u16; +using Elf64_Section = u16; + +/* Type for version symbol information. */ +using Elf32_Versym = Elf32_Half; +using Elf64_Versym = Elf64_Half; + +constexpr size_t ElfIdentSize = 16; + +/* The ELF file header. This appears at the start of every ELF file. */ + +struct Elf32_Ehdr { + std::array e_ident; /* Magic number and other info */ + Elf32_Half e_type; /* Object file type */ + Elf32_Half e_machine; /* Architecture */ + Elf32_Word e_version; /* Object file version */ + Elf32_Addr e_entry; /* Entry point virtual address */ + Elf32_Off e_phoff; /* Program header table file offset */ + Elf32_Off e_shoff; /* Section header table file offset */ + Elf32_Word e_flags; /* Processor-specific flags */ + Elf32_Half e_ehsize; /* ELF header size in bytes */ + Elf32_Half e_phentsize; /* Program header table entry size */ + Elf32_Half e_phnum; /* Program header table entry count */ + Elf32_Half e_shentsize; /* Section header table entry size */ + Elf32_Half e_shnum; /* Section header table entry count */ + Elf32_Half e_shstrndx; /* Section header string table index */ +}; + +struct Elf64_Ehdr { + std::array e_ident; /* Magic number and other info */ + Elf64_Half e_type; /* Object file type */ + Elf64_Half e_machine; /* Architecture */ + Elf64_Word e_version; /* Object file version */ + Elf64_Addr e_entry; /* Entry point virtual address */ + Elf64_Off e_phoff; /* Program header table file offset */ + Elf64_Off e_shoff; /* Section header table file offset */ + Elf64_Word e_flags; /* Processor-specific flags */ + Elf64_Half e_ehsize; /* ELF header size in bytes */ + Elf64_Half e_phentsize; /* Program header table entry size */ + Elf64_Half e_phnum; /* Program header table entry count */ + Elf64_Half e_shentsize; /* Section header table entry size */ + Elf64_Half e_shnum; /* Section header table entry count */ + Elf64_Half e_shstrndx; /* Section header string table index */ +}; + +constexpr u8 ElfClass32 = 1; /* 32-bit objects */ +constexpr u8 ElfClass64 = 2; /* 64-bit objects */ +constexpr u8 ElfData2Lsb = 1; /* 2's complement, little endian */ +constexpr u8 ElfVersionCurrent = 1; /* EV_CURRENT */ +constexpr u8 ElfOsAbiNone = 0; /* System V ABI */ + +constexpr u16 ElfTypeNone = 0; /* No file type */ +constexpr u16 ElfTypeRel = 0; /* Relocatable file */ +constexpr u16 ElfTypeExec = 0; /* Executable file */ +constexpr u16 ElfTypeDyn = 0; /* Shared object file */ + +constexpr u16 ElfMachineArm = 40; /* ARM */ +constexpr u16 ElfMachineAArch64 = 183; /* ARM AARCH64 */ + +constexpr std::array Elf32Ident{ + 0x7f, 'E', 'L', 'F', ElfClass32, ElfData2Lsb, ElfVersionCurrent, ElfOsAbiNone}; + +constexpr std::array Elf64Ident{ + 0x7f, 'E', 'L', 'F', ElfClass64, ElfData2Lsb, ElfVersionCurrent, ElfOsAbiNone}; + +/* Section header. */ + +struct Elf32_Shdr { + Elf32_Word sh_name; /* Section name (string tbl index) */ + Elf32_Word sh_type; /* Section type */ + Elf32_Word sh_flags; /* Section flags */ + Elf32_Addr sh_addr; /* Section virtual addr at execution */ + Elf32_Off sh_offset; /* Section file offset */ + Elf32_Word sh_size; /* Section size in bytes */ + Elf32_Word sh_link; /* Link to another section */ + Elf32_Word sh_info; /* Additional section information */ + Elf32_Word sh_addralign; /* Section alignment */ + Elf32_Word sh_entsize; /* Entry size if section holds table */ +}; + +struct Elf64_Shdr { + Elf64_Word sh_name; /* Section name (string tbl index) */ + Elf64_Word sh_type; /* Section type */ + Elf64_Xword sh_flags; /* Section flags */ + Elf64_Addr sh_addr; /* Section virtual addr at execution */ + Elf64_Off sh_offset; /* Section file offset */ + Elf64_Xword sh_size; /* Section size in bytes */ + Elf64_Word sh_link; /* Link to another section */ + Elf64_Word sh_info; /* Additional section information */ + Elf64_Xword sh_addralign; /* Section alignment */ + Elf64_Xword sh_entsize; /* Entry size if section holds table */ +}; + +constexpr u32 ElfShnUndef = 0; /* Undefined section */ + +constexpr u32 ElfShtNull = 0; /* Section header table entry unused */ +constexpr u32 ElfShtProgBits = 1; /* Program data */ +constexpr u32 ElfShtSymtab = 2; /* Symbol table */ +constexpr u32 ElfShtStrtab = 3; /* String table */ +constexpr u32 ElfShtRela = 4; /* Relocation entries with addends */ +constexpr u32 ElfShtDynamic = 6; /* Dynamic linking information */ +constexpr u32 ElfShtNobits = 7; /* Program space with no data (bss) */ +constexpr u32 ElfShtRel = 9; /* Relocation entries, no addends */ +constexpr u32 ElfShtDynsym = 11; /* Dynamic linker symbol table */ + +/* Symbol table entry. */ + +struct Elf32_Sym { + Elf32_Word st_name; /* Symbol name (string tbl index) */ + Elf32_Addr st_value; /* Symbol value */ + Elf32_Word st_size; /* Symbol size */ + u8 st_info; /* Symbol type and binding */ + u8 st_other; /* Symbol visibility */ + Elf32_Section st_shndx; /* Section index */ +}; + +struct Elf64_Sym { + Elf64_Word st_name; /* Symbol name (string tbl index) */ + u8 st_info; /* Symbol type and binding */ + u8 st_other; /* Symbol visibility */ + Elf64_Section st_shndx; /* Section index */ + Elf64_Addr st_value; /* Symbol value */ + Elf64_Xword st_size; /* Symbol size */ +}; + +/* How to extract and insert information held in the st_info field. */ + +static inline u8 ElfStBind(u8 st_info) { + return st_info >> 4; +} +static inline u8 ElfStType(u8 st_info) { + return st_info & 0xf; +} +static inline u8 ElfStInfo(u8 st_bind, u8 st_type) { + return static_cast((st_bind << 4) + (st_type & 0xf)); +} + +constexpr u8 ElfBindLocal = 0; /* Local symbol */ +constexpr u8 ElfBindGlobal = 1; /* Global symbol */ +constexpr u8 ElfBindWeak = 2; /* Weak symbol */ + +constexpr u8 ElfTypeUnspec = 0; /* Symbol type is unspecified */ +constexpr u8 ElfTypeObject = 1; /* Symbol is a data object */ +constexpr u8 ElfTypeFunc = 2; /* Symbol is a code object */ + +static inline u8 ElfStVisibility(u8 st_other) { + return static_cast(st_other & 0x3); +} + +constexpr u8 ElfVisibilityDefault = 0; /* Default symbol visibility rules */ +constexpr u8 ElfVisibilityInternal = 1; /* Processor specific hidden class */ +constexpr u8 ElfVisibilityHidden = 2; /* Sym unavailable in other modules */ +constexpr u8 ElfVisibilityProtected = 3; /* Not preemptible, not exported */ + +/* Relocation table entry without addend (in section of type ShtRel). */ + +struct Elf32_Rel { + Elf32_Addr r_offset; /* Address */ + Elf32_Word r_info; /* Relocation type and symbol index */ +}; + +/* Relocation table entry with addend (in section of type ShtRela). */ + +struct Elf32_Rela { + Elf32_Addr r_offset; /* Address */ + Elf32_Word r_info; /* Relocation type and symbol index */ + Elf32_Sword r_addend; /* Addend */ +}; + +struct Elf64_Rela { + Elf64_Addr r_offset; /* Address */ + Elf64_Xword r_info; /* Relocation type and symbol index */ + Elf64_Sxword r_addend; /* Addend */ +}; + +/* How to extract and insert information held in the r_info field. */ + +static inline u32 Elf32RelSymIndex(Elf32_Word r_info) { + return r_info >> 8; +} +static inline u8 Elf32RelType(Elf32_Word r_info) { + return static_cast(r_info & 0xff); +} +static inline Elf32_Word Elf32RelInfo(u32 sym_index, u8 type) { + return (sym_index << 8) + type; +} +static inline u32 Elf64RelSymIndex(Elf64_Xword r_info) { + return static_cast(r_info >> 32); +} +static inline u32 Elf64RelType(Elf64_Xword r_info) { + return r_info & 0xffffffff; +} +static inline Elf64_Xword Elf64RelInfo(u32 sym_index, u32 type) { + return (static_cast(sym_index) << 32) + type; +} + +constexpr u32 ElfArmCopy = 20; /* Copy symbol at runtime */ +constexpr u32 ElfArmGlobDat = 21; /* Create GOT entry */ +constexpr u32 ElfArmJumpSlot = 22; /* Create PLT entry */ +constexpr u32 ElfArmRelative = 23; /* Adjust by program base */ + +constexpr u32 ElfAArch64Copy = 1024; /* Copy symbol at runtime */ +constexpr u32 ElfAArch64GlobDat = 1025; /* Create GOT entry */ +constexpr u32 ElfAArch64JumpSlot = 1026; /* Create PLT entry */ +constexpr u32 ElfAArch64Relative = 1027; /* Adjust by program base */ + +/* Program segment header. */ + +struct Elf32_Phdr { + Elf32_Word p_type; /* Segment type */ + Elf32_Off p_offset; /* Segment file offset */ + Elf32_Addr p_vaddr; /* Segment virtual address */ + Elf32_Addr p_paddr; /* Segment physical address */ + Elf32_Word p_filesz; /* Segment size in file */ + Elf32_Word p_memsz; /* Segment size in memory */ + Elf32_Word p_flags; /* Segment flags */ + Elf32_Word p_align; /* Segment alignment */ +}; + +struct Elf64_Phdr { + Elf64_Word p_type; /* Segment type */ + Elf64_Word p_flags; /* Segment flags */ + Elf64_Off p_offset; /* Segment file offset */ + Elf64_Addr p_vaddr; /* Segment virtual address */ + Elf64_Addr p_paddr; /* Segment physical address */ + Elf64_Xword p_filesz; /* Segment size in file */ + Elf64_Xword p_memsz; /* Segment size in memory */ + Elf64_Xword p_align; /* Segment alignment */ +}; + +/* Legal values for p_type (segment type). */ + +constexpr u32 ElfPtNull = 0; /* Program header table entry unused */ +constexpr u32 ElfPtLoad = 1; /* Loadable program segment */ +constexpr u32 ElfPtDynamic = 2; /* Dynamic linking information */ +constexpr u32 ElfPtInterp = 3; /* Program interpreter */ +constexpr u32 ElfPtNote = 4; /* Auxiliary information */ +constexpr u32 ElfPtPhdr = 6; /* Entry for header table itself */ +constexpr u32 ElfPtTls = 7; /* Thread-local storage segment */ + +/* Legal values for p_flags (segment flags). */ + +constexpr u32 ElfPfExec = 0; /* Segment is executable */ +constexpr u32 ElfPfWrite = 1; /* Segment is writable */ +constexpr u32 ElfPfRead = 2; /* Segment is readable */ + +/* Dynamic section entry. */ + +struct Elf32_Dyn { + Elf32_Sword d_tag; /* Dynamic entry type */ + union { + Elf32_Word d_val; /* Integer value */ + Elf32_Addr d_ptr; /* Address value */ + } d_un; +}; + +struct Elf64_Dyn { + Elf64_Sxword d_tag; /* Dynamic entry type */ + union { + Elf64_Xword d_val; /* Integer value */ + Elf64_Addr d_ptr; /* Address value */ + } d_un; +}; + +/* Legal values for d_tag (dynamic entry type). */ + +constexpr u32 ElfDtNull = 0; /* Marks end of dynamic section */ +constexpr u32 ElfDtNeeded = 1; /* Name of needed library */ +constexpr u32 ElfDtPltRelSz = 2; /* Size in bytes of PLT relocs */ +constexpr u32 ElfDtPltGot = 3; /* Processor defined value */ +constexpr u32 ElfDtHash = 4; /* Address of symbol hash table */ +constexpr u32 ElfDtStrtab = 5; /* Address of string table */ +constexpr u32 ElfDtSymtab = 6; /* Address of symbol table */ +constexpr u32 ElfDtRela = 7; /* Address of Rela relocs */ +constexpr u32 ElfDtRelasz = 8; /* Total size of Rela relocs */ +constexpr u32 ElfDtRelaent = 9; /* Size of one Rela reloc */ +constexpr u32 ElfDtStrsz = 10; /* Size of string table */ +constexpr u32 ElfDtSyment = 11; /* Size of one symbol table entry */ +constexpr u32 ElfDtInit = 12; /* Address of init function */ +constexpr u32 ElfDtFini = 13; /* Address of termination function */ +constexpr u32 ElfDtRel = 17; /* Address of Rel relocs */ +constexpr u32 ElfDtRelsz = 18; /* Total size of Rel relocs */ +constexpr u32 ElfDtRelent = 19; /* Size of one Rel reloc */ +constexpr u32 ElfDtPltRel = 20; /* Type of reloc in PLT */ +constexpr u32 ElfDtTextRel = 22; /* Reloc might modify .text */ +constexpr u32 ElfDtJmpRel = 23; /* Address of PLT relocs */ +constexpr u32 ElfDtBindNow = 24; /* Process relocations of object */ +constexpr u32 ElfDtInitArray = 25; /* Array with addresses of init fct */ +constexpr u32 ElfDtFiniArray = 26; /* Array with addresses of fini fct */ +constexpr u32 ElfDtInitArraySz = 27; /* Size in bytes of DT_INIT_ARRAY */ +constexpr u32 ElfDtFiniArraySz = 28; /* Size in bytes of DT_FINI_ARRAY */ +constexpr u32 ElfDtSymtabShndx = 34; /* Address of SYMTAB_SHNDX section */ + +} // namespace ELF +} // namespace Common diff --git a/src/core/arm/symbols.cpp b/src/core/arm/symbols.cpp index 4aa1a1ee17..0259c7ea27 100644 --- a/src/core/arm/symbols.cpp +++ b/src/core/arm/symbols.cpp @@ -3,73 +3,14 @@ #include "common/bit_field.h" #include "common/common_funcs.h" +#include "common/elf.h" #include "core/arm/symbols.h" #include "core/core.h" #include "core/memory.h" +using namespace Common::ELF; + namespace Core { -namespace { - -constexpr u64 ELF_DYNAMIC_TAG_NULL = 0; -constexpr u64 ELF_DYNAMIC_TAG_STRTAB = 5; -constexpr u64 ELF_DYNAMIC_TAG_SYMTAB = 6; -constexpr u64 ELF_DYNAMIC_TAG_SYMENT = 11; - -enum class ELFSymbolType : u8 { - None = 0, - Object = 1, - Function = 2, - Section = 3, - File = 4, - Common = 5, - TLS = 6, -}; - -enum class ELFSymbolBinding : u8 { - Local = 0, - Global = 1, - Weak = 2, -}; - -enum class ELFSymbolVisibility : u8 { - Default = 0, - Internal = 1, - Hidden = 2, - Protected = 3, -}; - -struct ELF64Symbol { - u32 name_index; - union { - u8 info; - - BitField<0, 4, ELFSymbolType> type; - BitField<4, 4, ELFSymbolBinding> binding; - }; - ELFSymbolVisibility visibility; - u16 sh_index; - u64 value; - u64 size; -}; -static_assert(sizeof(ELF64Symbol) == 0x18, "ELF64Symbol has incorrect size."); - -struct ELF32Symbol { - u32 name_index; - u32 value; - u32 size; - union { - u8 info; - - BitField<0, 4, ELFSymbolType> type; - BitField<4, 4, ELFSymbolBinding> binding; - }; - ELFSymbolVisibility visibility; - u16 sh_index; -}; -static_assert(sizeof(ELF32Symbol) == 0x10, "ELF32Symbol has incorrect size."); - -} // Anonymous namespace - namespace Symbols { template @@ -110,15 +51,15 @@ static Symbols GetSymbols(ByteReader ReadBytes) { const Word value = ReadWord(dynamic_index + sizeof(Word)); dynamic_index += 2 * sizeof(Word); - if (tag == ELF_DYNAMIC_TAG_NULL) { + if (tag == ElfDtNull) { break; } - if (tag == ELF_DYNAMIC_TAG_STRTAB) { + if (tag == ElfDtStrtab) { string_table_offset = value; - } else if (tag == ELF_DYNAMIC_TAG_SYMTAB) { + } else if (tag == ElfDtSymtab) { symbol_table_offset = value; - } else if (tag == ELF_DYNAMIC_TAG_SYMENT) { + } else if (tag == ElfDtSyment) { symbol_entry_size = value; } } @@ -134,14 +75,14 @@ static Symbols GetSymbols(ByteReader ReadBytes) { ELFSymbol symbol{}; ReadBytes(&symbol, symbol_index, sizeof(ELFSymbol)); - VAddr string_offset = string_table_offset + symbol.name_index; + VAddr string_offset = string_table_offset + symbol.st_name; std::string name; for (u8 c = Read8(string_offset); c != 0; c = Read8(++string_offset)) { name += static_cast(c); } symbol_index += symbol_entry_size; - out[name] = std::make_pair(symbol.value, symbol.size); + out[name] = std::make_pair(symbol.st_value, symbol.st_size); } return out; @@ -152,9 +93,9 @@ Symbols GetSymbols(VAddr base, Core::Memory::Memory& memory, bool is_64) { [&](void* ptr, size_t offset, size_t size) { memory.ReadBlock(base + offset, ptr, size); }}; if (is_64) { - return GetSymbols(ReadBytes); + return GetSymbols(ReadBytes); } else { - return GetSymbols(ReadBytes); + return GetSymbols(ReadBytes); } } @@ -164,9 +105,9 @@ Symbols GetSymbols(std::span data, bool is_64) { }}; if (is_64) { - return GetSymbols(ReadBytes); + return GetSymbols(ReadBytes); } else { - return GetSymbols(ReadBytes); + return GetSymbols(ReadBytes); } } diff --git a/src/core/hle/service/jit/jit_context.cpp b/src/core/hle/service/jit/jit_context.cpp index 19bd85b6c2..4ed3f02e2e 100644 --- a/src/core/hle/service/jit/jit_context.cpp +++ b/src/core/hle/service/jit/jit_context.cpp @@ -11,10 +11,13 @@ #include "common/alignment.h" #include "common/common_funcs.h" #include "common/div_ceil.h" +#include "common/elf.h" #include "common/logging/log.h" #include "core/hle/service/jit/jit_context.h" #include "core/memory.h" +using namespace Common::ELF; + namespace Service::JIT { constexpr std::array SVC0_ARM64 = { @@ -26,25 +29,6 @@ constexpr std::array HELPER_FUNCTIONS{ "_stop", "_resolve", "_panic", "memcpy", "memmove", "memset", }; -struct Elf64_Dyn { - u64 d_tag; - u64 d_un; -}; - -struct Elf64_Rela { - u64 r_offset; - u64 r_info; - s64 r_addend; -}; - -static constexpr u32 Elf64_RelaType(const Elf64_Rela* rela) { - return static_cast(rela->r_info); -} - -constexpr int DT_RELA = 7; /* Address of Rela relocs */ -constexpr int DT_RELASZ = 8; /* Total size of Rela relocs */ -constexpr int R_AARCH64_RELATIVE = 1027; /* Adjust by program base. */ - constexpr size_t STACK_ALIGN = 16; class JITContextImpl; @@ -206,17 +190,17 @@ public: if (!dyn.d_tag) { break; } - if (dyn.d_tag == DT_RELA) { - rela_dyn = dyn.d_un; + if (dyn.d_tag == ElfDtRela) { + rela_dyn = dyn.d_un.d_ptr; } - if (dyn.d_tag == DT_RELASZ) { - num_rela = dyn.d_un / sizeof(Elf64_Rela); + if (dyn.d_tag == ElfDtRelasz) { + num_rela = dyn.d_un.d_val / sizeof(Elf64_Rela); } } for (size_t i = 0; i < num_rela; i++) { const auto rela{callbacks->ReadMemory(rela_dyn + i * sizeof(Elf64_Rela))}; - if (Elf64_RelaType(&rela) != R_AARCH64_RELATIVE) { + if (Elf64RelType(rela.r_info) != ElfAArch64Relative) { continue; } const VAddr contents{callbacks->MemoryRead64(rela.r_offset)}; diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp index cf5933699c..dfb10c34f0 100644 --- a/src/core/loader/elf.cpp +++ b/src/core/loader/elf.cpp @@ -6,6 +6,7 @@ #include #include "common/common_funcs.h" #include "common/common_types.h" +#include "common/elf.h" #include "common/logging/log.h" #include "core/hle/kernel/code_set.h" #include "core/hle/kernel/k_page_table.h" @@ -13,159 +14,7 @@ #include "core/loader/elf.h" #include "core/memory.h" -//////////////////////////////////////////////////////////////////////////////////////////////////// -// ELF Header Constants - -// File type -enum ElfType { - ET_NONE = 0, - ET_REL = 1, - ET_EXEC = 2, - ET_DYN = 3, - ET_CORE = 4, - ET_LOPROC = 0xFF00, - ET_HIPROC = 0xFFFF, -}; - -// Machine/Architecture -enum ElfMachine { - EM_NONE = 0, - EM_M32 = 1, - EM_SPARC = 2, - EM_386 = 3, - EM_68K = 4, - EM_88K = 5, - EM_860 = 7, - EM_MIPS = 8 -}; - -// File version -#define EV_NONE 0 -#define EV_CURRENT 1 - -// Identification index -#define EI_MAG0 0 -#define EI_MAG1 1 -#define EI_MAG2 2 -#define EI_MAG3 3 -#define EI_CLASS 4 -#define EI_DATA 5 -#define EI_VERSION 6 -#define EI_PAD 7 -#define EI_NIDENT 16 - -// Sections constants - -// Section types -#define SHT_NULL 0 -#define SHT_PROGBITS 1 -#define SHT_SYMTAB 2 -#define SHT_STRTAB 3 -#define SHT_RELA 4 -#define SHT_HASH 5 -#define SHT_DYNAMIC 6 -#define SHT_NOTE 7 -#define SHT_NOBITS 8 -#define SHT_REL 9 -#define SHT_SHLIB 10 -#define SHT_DYNSYM 11 -#define SHT_LOPROC 0x70000000 -#define SHT_HIPROC 0x7FFFFFFF -#define SHT_LOUSER 0x80000000 -#define SHT_HIUSER 0xFFFFFFFF - -// Section flags -enum ElfSectionFlags { - SHF_WRITE = 0x1, - SHF_ALLOC = 0x2, - SHF_EXECINSTR = 0x4, - SHF_MASKPROC = 0xF0000000, -}; - -// Segment types -#define PT_NULL 0 -#define PT_LOAD 1 -#define PT_DYNAMIC 2 -#define PT_INTERP 3 -#define PT_NOTE 4 -#define PT_SHLIB 5 -#define PT_PHDR 6 -#define PT_LOPROC 0x70000000 -#define PT_HIPROC 0x7FFFFFFF - -// Segment flags -#define PF_X 0x1 -#define PF_W 0x2 -#define PF_R 0x4 -#define PF_MASKPROC 0xF0000000 - -typedef unsigned int Elf32_Addr; -typedef unsigned short Elf32_Half; -typedef unsigned int Elf32_Off; -typedef signed int Elf32_Sword; -typedef unsigned int Elf32_Word; - -//////////////////////////////////////////////////////////////////////////////////////////////////// -// ELF file header - -struct Elf32_Ehdr { - unsigned char e_ident[EI_NIDENT]; - Elf32_Half e_type; - Elf32_Half e_machine; - Elf32_Word e_version; - Elf32_Addr e_entry; - Elf32_Off e_phoff; - Elf32_Off e_shoff; - Elf32_Word e_flags; - Elf32_Half e_ehsize; - Elf32_Half e_phentsize; - Elf32_Half e_phnum; - Elf32_Half e_shentsize; - Elf32_Half e_shnum; - Elf32_Half e_shstrndx; -}; - -// Section header -struct Elf32_Shdr { - Elf32_Word sh_name; - Elf32_Word sh_type; - Elf32_Word sh_flags; - Elf32_Addr sh_addr; - Elf32_Off sh_offset; - Elf32_Word sh_size; - Elf32_Word sh_link; - Elf32_Word sh_info; - Elf32_Word sh_addralign; - Elf32_Word sh_entsize; -}; - -// Segment header -struct Elf32_Phdr { - Elf32_Word p_type; - Elf32_Off p_offset; - Elf32_Addr p_vaddr; - Elf32_Addr p_paddr; - Elf32_Word p_filesz; - Elf32_Word p_memsz; - Elf32_Word p_flags; - Elf32_Word p_align; -}; - -// Symbol table entry -struct Elf32_Sym { - Elf32_Word st_name; - Elf32_Addr st_value; - Elf32_Word st_size; - unsigned char st_info; - unsigned char st_other; - Elf32_Half st_shndx; -}; - -// Relocation entries -struct Elf32_Rel { - Elf32_Addr r_offset; - Elf32_Word r_info; -}; +using namespace Common::ELF; //////////////////////////////////////////////////////////////////////////////////////////////////// // ElfReader class @@ -193,11 +42,11 @@ public: } // Quick accessors - ElfType GetType() const { - return (ElfType)(header->e_type); + u16 GetType() const { + return header->e_type; } - ElfMachine GetMachine() const { - return (ElfMachine)(header->e_machine); + u16 GetMachine() const { + return header->e_machine; } VAddr GetEntryPoint() const { return entryPoint; @@ -220,13 +69,13 @@ public: const u8* GetSectionDataPtr(int section) const { if (section < 0 || section >= header->e_shnum) return nullptr; - if (sections[section].sh_type != SHT_NOBITS) + if (sections[section].sh_type != ElfShtNobits) return GetPtr(sections[section].sh_offset); else return nullptr; } bool IsCodeSection(int section) const { - return sections[section].sh_type == SHT_PROGBITS; + return sections[section].sh_type == ElfShtProgBits; } const u8* GetSegmentPtr(int segment) { return GetPtr(segments[segment].p_offset); @@ -256,7 +105,7 @@ ElfReader::ElfReader(void* ptr) { } const char* ElfReader::GetSectionName(int section) const { - if (sections[section].sh_type == SHT_NULL) + if (sections[section].sh_type == ElfShtNull) return nullptr; int name_offset = sections[section].sh_name; @@ -272,7 +121,7 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { LOG_DEBUG(Loader, "String section: {}", header->e_shstrndx); // Should we relocate? - relocate = (header->e_type != ET_EXEC); + relocate = (header->e_type != ElfTypeExec); if (relocate) { LOG_DEBUG(Loader, "Relocatable module"); @@ -288,7 +137,7 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { u64 total_image_size = 0; for (unsigned int i = 0; i < header->e_phnum; ++i) { const Elf32_Phdr* p = &segments[i]; - if (p->p_type == PT_LOAD) { + if (p->p_type == ElfPtLoad) { total_image_size += (p->p_memsz + 0xFFF) & ~0xFFF; } } @@ -303,14 +152,14 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { LOG_DEBUG(Loader, "Type: {} Vaddr: {:08X} Filesz: {:08X} Memsz: {:08X} ", p->p_type, p->p_vaddr, p->p_filesz, p->p_memsz); - if (p->p_type == PT_LOAD) { + if (p->p_type == ElfPtLoad) { Kernel::CodeSet::Segment* codeset_segment; - u32 permission_flags = p->p_flags & (PF_R | PF_W | PF_X); - if (permission_flags == (PF_R | PF_X)) { + u32 permission_flags = p->p_flags & (ElfPfRead | ElfPfWrite | ElfPfExec); + if (permission_flags == (ElfPfRead | ElfPfExec)) { codeset_segment = &codeset.CodeSegment(); - } else if (permission_flags == (PF_R)) { + } else if (permission_flags == (ElfPfRead)) { codeset_segment = &codeset.RODataSegment(); - } else if (permission_flags == (PF_R | PF_W)) { + } else if (permission_flags == (ElfPfRead | ElfPfWrite)) { codeset_segment = &codeset.DataSegment(); } else { LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id {} with flags {:X}", i,