--- /dev/null
+//===-- Support/ELF.h - ELF constants and data structures -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header contains common, non-processor-specific data structures and
+// constants for the ELF file format.
+//
+// The details of this file are largely based on the Tool Interface Standard
+// (TIS) Executable and Linking Format (ELF) Specification Version 1.2,
+// May 1995.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Support/DataTypes.h"
+#include <cstring>
+#include <cstdlib>
+
+namespace llvm {
+
+namespace ELF {
+
+typedef uint32_t Elf32_Addr; // Program address
+typedef uint16_t Elf32_Half;
+typedef uint32_t Elf32_Off; // File offset
+typedef int32_t Elf32_Sword;
+typedef uint32_t Elf32_Word;
+
+// Object file magic string.
+static const char *ElfMagic = "\x7fELF";
+
+struct Elf32_Ehdr {
+ unsigned char e_ident[16]; // ELF Identification bytes
+ Elf32_Half e_type; // Type of file (see ET_* below)
+ Elf32_Half e_machine; // Required architecture for this file (see EM_*)
+ Elf32_Word e_version; // Must be equal to 1
+ Elf32_Addr e_entry; // Address to jump to in order to start program
+ Elf32_Off e_phoff; // Program header table's file offset, in bytes
+ Elf32_Off e_shoff; // Section header table's file offset, in bytes
+ Elf32_Word e_flags; // Processor-specific flags
+ Elf32_Half e_ehsize; // Size of ELF header, in bytes
+ Elf32_Half e_phentsize; // Size of an entry in the program header table
+ Elf32_Half e_phnum; // Number of entries in the program header table
+ Elf32_Half e_shentsize; // Size of an entry in the section header table
+ Elf32_Half e_shnum; // Number of entries in the section header table
+ Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
+ bool checkMagic () const {
+ return (memcmp (e_ident, ElfMagic, strlen (ElfMagic)) == 0;
+ }
+ unsigned char getFileClass () const { return e_ident[4]; }
+ unsigned char getDataEncoding () { return e_ident[5]; }
+};
+
+// File types
+enum {
+ ET_NONE = 0, // No file type
+ ET_REL = 1, // Relocatable file
+ ET_EXEC = 2, // Executable file
+ ET_DYN = 3, // Shared object file
+ ET_CORE = 4, // Core file
+ ET_LOPROC = 0xff00, // Beginning of processor-specific codes
+ ET_HIPROC = 0xffff // Processor-specific
+};
+
+// Machine architectures
+enum {
+ EM_NONE = 0, // No machine
+ EM_M32 = 1, // AT&T WE 32100
+ EM_SPARC = 2, // SPARC
+ EM_386 = 3, // Intel 386
+ EM_68K = 4, // Motorola 68000
+ EM_88K = 5, // Motorola 88000
+ EM_860 = 7, // Intel 80860
+ EM_MIPS = 8 // MIPS R3000
+};
+
+// Object file classes.
+enum {
+ ELFCLASS32 = 1, // 32-bit object file
+ ELFCLASS64 = 2 // 64-bit object file
+};
+
+// Object file byte orderings.
+enum {
+ ELFDATA2LSB = 1, // Little-endian object file
+ ELFDATA2MSB = 2 // Big-endian object file
+};
+
+// Section header.
+struct Elf32_Shdr {
+ Elf32_Word sh_name; // Section name (index into string table)
+ Elf32_Word sh_type; // Section type (SHT_*)
+ Elf32_Word sh_flags; // Section flags (SHF_*)
+ Elf32_Addr sh_addr; // Address where section is to be loaded
+ Elf32_Off sh_offset; // File offset of section data, in bytes
+ Elf32_Word sh_size; // Size of section, in bytes
+ Elf32_Word sh_link; // Section type-specific header table index link
+ Elf32_Word sh_info; // Section type-specific extra information
+ Elf32_Word sh_addralign; // Section address alignment
+ Elf32_Word sh_entsize; // Size of records contained within the section
+};
+
+// Special section indices.
+enum {
+ SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
+ SHN_LORESERVE = 0xff00, // Lowest reserved index
+ SHN_LOPROC = 0xff00, // Lowest processor-specific index
+ SHN_HIPROC = 0xff1f, // Highest processor-specific index
+ SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
+ SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
+ SHN_HIRESERVE = 0xffff // Highest reserved index
+};
+
+// Section types.
+enum {
+ SHT_NULL = 0, // No associated section (inactive entry).
+ SHT_PROGBITS = 1, // Program-defined contents.
+ SHT_SYMTAB = 2, // Symbol table.
+ SHT_STRTAB = 3, // String table.
+ SHT_RELA = 4, // Relocation entries; explicit addends.
+ SHT_HASH = 5, // Symbol hash table.
+ SHT_DYNAMIC = 6, // Information for dynamic linking.
+ SHT_NOTE = 7, // Information about the file.
+ SHT_NOBITS = 8, // Data occupies no space in the file.
+ SHT_REL = 9, // Relocation entries; no explicit addends.
+ SHT_SHLIB = 10, // Reserved.
+ SHT_DYNSYM = 11, // Symbol table.
+ SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type.
+ SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type.
+ SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
+ SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
+};
+
+// Section flags.
+enum {
+ SHF_WRITE = 0x1, // Section data should be writable during execution.
+ SHF_ALLOC = 0x2, // Section occupies memory during program execution.
+ SHF_EXECINSTR = 0x4, // Section contains executable machine instructions.
+ SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags.
+};
+
+// Symbol table entries.
+struct Elf32_Sym {
+ Elf32_Word st_name; // Symbol name (index into string table)
+ Elf32_Addr st_value; // Value or address associated with the symbol
+ Elf32_Word st_size; // Size of the symbol
+ unsigned char st_info; // Symbol's type and binding attributes
+ unsigned char st_other; // Must be zero; reserved
+ Elf32_Half st_shndx; // Which section (header table index) it's defined in
+
+ // These accessors and mutators correspond to the ELF32_ST_BIND,
+ // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
+ unsigned char getBinding () const { return st_info >> 4; }
+ unsigned char getType () const { return st_info & 0x0f; }
+ void setBinding (unsigned char b) { setBindingAndType (b, getType ()); }
+ void setType (unsigned char t) { setBindingAndType (getBinding (), t); }
+ void setBindingAndType (unsigned char b, unsigned char t) {
+ st_info = (b << 4) + (t & 0x0f);
+ }
+};
+
+// Symbol bindings.
+enum {
+ STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
+ STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
+ STB_WEAK = 2, // Weak symbol, like global but lower-precedence
+ STB_LOPROC = 13, // Lowest processor-specific binding type
+ STB_HIPROC = 15 // Highest processor-specific binding type
+};
+
+// Symbol types.
+enum {
+ STT_NOTYPE = 0, // Symbol's type is not specified
+ STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
+ STT_FUNC = 2, // Symbol is executable code (function, etc.)
+ STT_SECTION = 3, // Symbol refers to a section
+ STT_FILE = 4, // Local, absolute symbol that refers to a file
+ STT_LOPROC = 13, // Lowest processor-specific symbol type
+ STT_HIPROC = 15 // Highest processor-specific symbol type
+};
+
+// Relocation entry, without explicit addend.
+struct Elf32_Rel {
+ Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf32_Word r_info; // Symbol table index and type of relocation to apply
+
+ // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+ // and ELF32_R_INFO macros defined in the ELF specification:
+ Elf32_Word getSymbol () const { return (r_info >> 8); }
+ unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
+ void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbolAndType (Elf32_Word s, unsigned char t) {
+ r_info = (s << 8) + t;
+ };
+};
+
+// Relocation entry with explicit addend.
+struct Elf32_Rela {
+ Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf32_Word r_info; // Symbol table index and type of relocation to apply
+ Elf32_Sword r_addend; // Compute value for relocatable field by adding this
+
+ // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+ // and ELF32_R_INFO macros defined in the ELF specification:
+ Elf32_Word getSymbol () const { return (r_info >> 8); }
+ unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
+ void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbolAndType (Elf32_Word s, unsigned char t) {
+ r_info = (s << 8) + t;
+ };
+};
+
+// Program header.
+struct Elf32_Phdr {
+ Elf32_Word p_type; // Type of segment
+ Elf32_Off p_offset; // File offset where segment is located, in bytes
+ Elf32_Addr p_vaddr; // Virtual address of beginning of segment
+ Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
+ Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
+ Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
+ Elf32_Word p_flags; // Segment flags
+ Elf32_Word p_align; // Segment alignment constraint
+};
+
+enum {
+ PT_NULL = 0, // Unused segment.
+ PT_LOAD = 1, // Loadable segment.
+ PT_DYNAMIC = 2, // Dynamic linking information.
+ PT_INTERP = 3, // Interpreter pathname.
+ PT_NOTE = 4, // Auxiliary information.
+ PT_SHLIB = 5, // Reserved.
+ PT_PHDR = 6, // The program header table itself.
+ PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
+ PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type.
+};
+
+} // end namespace ELF
+
+} // end namespace llvm
--- /dev/null
+//===-- Support/ELF.h - ELF constants and data structures -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header contains common, non-processor-specific data structures and
+// constants for the ELF file format.
+//
+// The details of this file are largely based on the Tool Interface Standard
+// (TIS) Executable and Linking Format (ELF) Specification Version 1.2,
+// May 1995.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Support/DataTypes.h"
+#include <cstring>
+#include <cstdlib>
+
+namespace llvm {
+
+namespace ELF {
+
+typedef uint32_t Elf32_Addr; // Program address
+typedef uint16_t Elf32_Half;
+typedef uint32_t Elf32_Off; // File offset
+typedef int32_t Elf32_Sword;
+typedef uint32_t Elf32_Word;
+
+// Object file magic string.
+static const char *ElfMagic = "\x7fELF";
+
+struct Elf32_Ehdr {
+ unsigned char e_ident[16]; // ELF Identification bytes
+ Elf32_Half e_type; // Type of file (see ET_* below)
+ Elf32_Half e_machine; // Required architecture for this file (see EM_*)
+ Elf32_Word e_version; // Must be equal to 1
+ Elf32_Addr e_entry; // Address to jump to in order to start program
+ Elf32_Off e_phoff; // Program header table's file offset, in bytes
+ Elf32_Off e_shoff; // Section header table's file offset, in bytes
+ Elf32_Word e_flags; // Processor-specific flags
+ Elf32_Half e_ehsize; // Size of ELF header, in bytes
+ Elf32_Half e_phentsize; // Size of an entry in the program header table
+ Elf32_Half e_phnum; // Number of entries in the program header table
+ Elf32_Half e_shentsize; // Size of an entry in the section header table
+ Elf32_Half e_shnum; // Number of entries in the section header table
+ Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
+ bool checkMagic () const {
+ return (memcmp (e_ident, ElfMagic, strlen (ElfMagic)) == 0;
+ }
+ unsigned char getFileClass () const { return e_ident[4]; }
+ unsigned char getDataEncoding () { return e_ident[5]; }
+};
+
+// File types
+enum {
+ ET_NONE = 0, // No file type
+ ET_REL = 1, // Relocatable file
+ ET_EXEC = 2, // Executable file
+ ET_DYN = 3, // Shared object file
+ ET_CORE = 4, // Core file
+ ET_LOPROC = 0xff00, // Beginning of processor-specific codes
+ ET_HIPROC = 0xffff // Processor-specific
+};
+
+// Machine architectures
+enum {
+ EM_NONE = 0, // No machine
+ EM_M32 = 1, // AT&T WE 32100
+ EM_SPARC = 2, // SPARC
+ EM_386 = 3, // Intel 386
+ EM_68K = 4, // Motorola 68000
+ EM_88K = 5, // Motorola 88000
+ EM_860 = 7, // Intel 80860
+ EM_MIPS = 8 // MIPS R3000
+};
+
+// Object file classes.
+enum {
+ ELFCLASS32 = 1, // 32-bit object file
+ ELFCLASS64 = 2 // 64-bit object file
+};
+
+// Object file byte orderings.
+enum {
+ ELFDATA2LSB = 1, // Little-endian object file
+ ELFDATA2MSB = 2 // Big-endian object file
+};
+
+// Section header.
+struct Elf32_Shdr {
+ Elf32_Word sh_name; // Section name (index into string table)
+ Elf32_Word sh_type; // Section type (SHT_*)
+ Elf32_Word sh_flags; // Section flags (SHF_*)
+ Elf32_Addr sh_addr; // Address where section is to be loaded
+ Elf32_Off sh_offset; // File offset of section data, in bytes
+ Elf32_Word sh_size; // Size of section, in bytes
+ Elf32_Word sh_link; // Section type-specific header table index link
+ Elf32_Word sh_info; // Section type-specific extra information
+ Elf32_Word sh_addralign; // Section address alignment
+ Elf32_Word sh_entsize; // Size of records contained within the section
+};
+
+// Special section indices.
+enum {
+ SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
+ SHN_LORESERVE = 0xff00, // Lowest reserved index
+ SHN_LOPROC = 0xff00, // Lowest processor-specific index
+ SHN_HIPROC = 0xff1f, // Highest processor-specific index
+ SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
+ SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
+ SHN_HIRESERVE = 0xffff // Highest reserved index
+};
+
+// Section types.
+enum {
+ SHT_NULL = 0, // No associated section (inactive entry).
+ SHT_PROGBITS = 1, // Program-defined contents.
+ SHT_SYMTAB = 2, // Symbol table.
+ SHT_STRTAB = 3, // String table.
+ SHT_RELA = 4, // Relocation entries; explicit addends.
+ SHT_HASH = 5, // Symbol hash table.
+ SHT_DYNAMIC = 6, // Information for dynamic linking.
+ SHT_NOTE = 7, // Information about the file.
+ SHT_NOBITS = 8, // Data occupies no space in the file.
+ SHT_REL = 9, // Relocation entries; no explicit addends.
+ SHT_SHLIB = 10, // Reserved.
+ SHT_DYNSYM = 11, // Symbol table.
+ SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type.
+ SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type.
+ SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
+ SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
+};
+
+// Section flags.
+enum {
+ SHF_WRITE = 0x1, // Section data should be writable during execution.
+ SHF_ALLOC = 0x2, // Section occupies memory during program execution.
+ SHF_EXECINSTR = 0x4, // Section contains executable machine instructions.
+ SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags.
+};
+
+// Symbol table entries.
+struct Elf32_Sym {
+ Elf32_Word st_name; // Symbol name (index into string table)
+ Elf32_Addr st_value; // Value or address associated with the symbol
+ Elf32_Word st_size; // Size of the symbol
+ unsigned char st_info; // Symbol's type and binding attributes
+ unsigned char st_other; // Must be zero; reserved
+ Elf32_Half st_shndx; // Which section (header table index) it's defined in
+
+ // These accessors and mutators correspond to the ELF32_ST_BIND,
+ // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
+ unsigned char getBinding () const { return st_info >> 4; }
+ unsigned char getType () const { return st_info & 0x0f; }
+ void setBinding (unsigned char b) { setBindingAndType (b, getType ()); }
+ void setType (unsigned char t) { setBindingAndType (getBinding (), t); }
+ void setBindingAndType (unsigned char b, unsigned char t) {
+ st_info = (b << 4) + (t & 0x0f);
+ }
+};
+
+// Symbol bindings.
+enum {
+ STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
+ STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
+ STB_WEAK = 2, // Weak symbol, like global but lower-precedence
+ STB_LOPROC = 13, // Lowest processor-specific binding type
+ STB_HIPROC = 15 // Highest processor-specific binding type
+};
+
+// Symbol types.
+enum {
+ STT_NOTYPE = 0, // Symbol's type is not specified
+ STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
+ STT_FUNC = 2, // Symbol is executable code (function, etc.)
+ STT_SECTION = 3, // Symbol refers to a section
+ STT_FILE = 4, // Local, absolute symbol that refers to a file
+ STT_LOPROC = 13, // Lowest processor-specific symbol type
+ STT_HIPROC = 15 // Highest processor-specific symbol type
+};
+
+// Relocation entry, without explicit addend.
+struct Elf32_Rel {
+ Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf32_Word r_info; // Symbol table index and type of relocation to apply
+
+ // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+ // and ELF32_R_INFO macros defined in the ELF specification:
+ Elf32_Word getSymbol () const { return (r_info >> 8); }
+ unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
+ void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbolAndType (Elf32_Word s, unsigned char t) {
+ r_info = (s << 8) + t;
+ };
+};
+
+// Relocation entry with explicit addend.
+struct Elf32_Rela {
+ Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf32_Word r_info; // Symbol table index and type of relocation to apply
+ Elf32_Sword r_addend; // Compute value for relocatable field by adding this
+
+ // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+ // and ELF32_R_INFO macros defined in the ELF specification:
+ Elf32_Word getSymbol () const { return (r_info >> 8); }
+ unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
+ void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbolAndType (Elf32_Word s, unsigned char t) {
+ r_info = (s << 8) + t;
+ };
+};
+
+// Program header.
+struct Elf32_Phdr {
+ Elf32_Word p_type; // Type of segment
+ Elf32_Off p_offset; // File offset where segment is located, in bytes
+ Elf32_Addr p_vaddr; // Virtual address of beginning of segment
+ Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
+ Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
+ Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
+ Elf32_Word p_flags; // Segment flags
+ Elf32_Word p_align; // Segment alignment constraint
+};
+
+enum {
+ PT_NULL = 0, // Unused segment.
+ PT_LOAD = 1, // Loadable segment.
+ PT_DYNAMIC = 2, // Dynamic linking information.
+ PT_INTERP = 3, // Interpreter pathname.
+ PT_NOTE = 4, // Auxiliary information.
+ PT_SHLIB = 5, // Reserved.
+ PT_PHDR = 6, // The program header table itself.
+ PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
+ PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type.
+};
+
+} // end namespace ELF
+
+} // end namespace llvm
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