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-rw-r--r--src/common/CMakeLists.txt1
-rw-r--r--src/common/elf.h333
-rw-r--r--src/core/arm/symbols.cpp85
-rw-r--r--src/core/hle/service/jit/jit_context.cpp32
-rw-r--r--src/core/loader/elf.cpp183
5 files changed, 371 insertions, 263 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index adf70eb8b..73bf626d4 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 000000000..14a5e9597
--- /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 <array>
+#include <cstddef>
+
+#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<u8, ElfIdentSize> 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<u8, ElfIdentSize> 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<u8, ElfIdentSize> Elf32Ident{
+ 0x7f, 'E', 'L', 'F', ElfClass32, ElfData2Lsb, ElfVersionCurrent, ElfOsAbiNone};
+
+constexpr std::array<u8, ElfIdentSize> 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<u8>((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<u8>(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<u8>(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<u32>(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<Elf64_Xword>(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 4aa1a1ee1..0259c7ea2 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"
-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
+using namespace Common::ELF;
+namespace Core {
namespace Symbols {
template <typename Word, typename ELFSymbol, typename ByteReader>
@@ -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<char>(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<u64, ELF64Symbol>(ReadBytes);
+ return GetSymbols<u64, Elf64_Sym>(ReadBytes);
} else {
- return GetSymbols<u32, ELF32Symbol>(ReadBytes);
+ return GetSymbols<u32, Elf32_Sym>(ReadBytes);
}
}
@@ -164,9 +105,9 @@ Symbols GetSymbols(std::span<const u8> data, bool is_64) {
}};
if (is_64) {
- return GetSymbols<u64, ELF64Symbol>(ReadBytes);
+ return GetSymbols<u64, Elf64_Sym>(ReadBytes);
} else {
- return GetSymbols<u32, ELF32Symbol>(ReadBytes);
+ return GetSymbols<u32, Elf32_Sym>(ReadBytes);
}
}
diff --git a/src/core/hle/service/jit/jit_context.cpp b/src/core/hle/service/jit/jit_context.cpp
index 19bd85b6c..4ed3f02e2 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<u8, 8> 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<u32>(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<Elf64_Rela>(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 cf5933699..dfb10c34f 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -6,6 +6,7 @@
#include <memory>
#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,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 06:32:45 +0100