/* ----------------------------------------------------------------------- * * * Copyright 1996-2018 The NASM Authors - All Rights Reserved * See the file AUTHORS included with the NASM distribution for * the specific copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following * conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * ----------------------------------------------------------------------- */ #ifndef OUTPUT_ELF_H #define OUTPUT_ELF_H /* * Since NASM support both Elf32/64 file formats * we need to cover all types, structures, typedefs and etc */ #include "compiler.h" /* 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_LOOS 0x60000000 #define PT_HIOS 0x6fffffff #define PT_LOPROC 0x70000000 #define PT_HIPROC 0x7fffffff #define PT_GNU_EH_FRAME 0x6474e550 /* Extension, eh? */ /* ELF file types */ #define ET_NONE 0 #define ET_REL 1 #define ET_EXEC 2 #define ET_DYN 3 #define ET_CORE 4 #define ET_LOPROC 0xff00 #define ET_HIPROC 0xffff /* ELF machine types */ #define EM_NONE 0 #define EM_M32 1 #define EM_SPARC 2 #define EM_386 3 #define EM_68K 4 #define EM_88K 5 #define EM_486 6 /* Not used in Linux at least */ #define EM_860 7 #define EM_MIPS 8 /* R3k, bigendian(?) */ #define EM_MIPS_RS4_BE 10 /* R4k BE */ #define EM_PARISC 15 #define EM_SPARC32PLUS 18 #define EM_PPC 20 #define EM_PPC64 21 #define EM_S390 22 #define EM_SH 42 #define EM_SPARCV9 43 /* v9 = SPARC64 */ #define EM_H8_300H 47 #define EM_H8S 48 #define EM_IA_64 50 #define EM_X86_64 62 #define EM_CRIS 76 #define EM_V850 87 #define EM_ALPHA 0x9026 /* Interrim Alpha that stuck around */ #define EM_CYGNUS_V850 0x9080 /* Old v850 ID used by Cygnus */ #define EM_S390_OLD 0xA390 /* Obsolete interrim value for S/390 */ /* Dynamic type values */ #define DT_NULL 0 #define DT_NEEDED 1 #define DT_PLTRELSZ 2 #define DT_PLTGOT 3 #define DT_HASH 4 #define DT_STRTAB 5 #define DT_SYMTAB 6 #define DT_RELA 7 #define DT_RELASZ 8 #define DT_RELAENT 9 #define DT_STRSZ 10 #define DT_SYMENT 11 #define DT_INIT 12 #define DT_FINI 13 #define DT_SONAME 14 #define DT_RPATH 15 #define DT_SYMBOLIC 16 #define DT_REL 17 #define DT_RELSZ 18 #define DT_RELENT 19 #define DT_PLTREL 20 #define DT_DEBUG 21 #define DT_TEXTREL 22 #define DT_JMPREL 23 #define DT_LOPROC 0x70000000 #define DT_HIPROC 0x7fffffff /* Auxilliary table entries */ #define AT_NULL 0 /* end of vector */ #define AT_IGNORE 1 /* entry should be ignored */ #define AT_EXECFD 2 /* file descriptor of program */ #define AT_PHDR 3 /* program headers for program */ #define AT_PHENT 4 /* size of program header entry */ #define AT_PHNUM 5 /* number of program headers */ #define AT_PAGESZ 6 /* system page size */ #define AT_BASE 7 /* base address of interpreter */ #define AT_FLAGS 8 /* flags */ #define AT_ENTRY 9 /* entry point of program */ #define AT_NOTELF 10 /* program is not ELF */ #define AT_UID 11 /* real uid */ #define AT_EUID 12 /* effective uid */ #define AT_GID 13 /* real gid */ #define AT_EGID 14 /* effective gid */ #define AT_PLATFORM 15 /* string identifying CPU for optimizations */ #define AT_HWCAP 16 /* arch dependent hints at CPU capabilities */ #define AT_CLKTCK 17 /* frequency at which times() increments */ /* 18..22 = ? */ #define AT_SECURE 23 /* secure mode boolean */ /* Program header permission flags */ #define PF_X 0x1 #define PF_W 0x2 #define PF_R 0x4 /* Section header 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_INIT_ARRAY 14 #define SHT_FINI_ARRAY 15 #define SHT_PREINIT_ARRAY 16 #define SHT_GROUP 17 #define SHT_SYMTAB_SHNDX 18 #define SHT_LOPROC 0x70000000 #define SHT_HIPROC 0x7fffffff #define SHT_LOUSER 0x80000000 #define SHT_HIUSER 0xffffffff /* Section header flags */ #define SHF_WRITE (1 << 0) /* Writable */ #define SHF_ALLOC (1 << 1) /* Occupies memory during execution */ #define SHF_EXECINSTR (1 << 2) /* Executable */ #define SHF_MERGE (1 << 4) /* Might be merged */ #define SHF_STRINGS (1 << 5) /* Contains nul-terminated strings */ #define SHF_INFO_LINK (1 << 6) /* `sh_info' contains SHT index */ #define SHF_LINK_ORDER (1 << 7) /* Preserve order after combining */ #define SHF_OS_NONCONFORMING (1 << 8) /* Non-standard OS specific handling required */ #define SHF_GROUP (1 << 9) /* Section is member of a group */ #define SHF_TLS (1 << 10) /* Section hold thread-local data */ /* Special section numbers */ #define SHN_UNDEF 0x0000 #define SHN_LORESERVE 0xff00 #define SHN_LOPROC 0xff00 #define SHN_HIPROC 0xff1f #define SHN_ABS 0xfff1 #define SHN_COMMON 0xfff2 #define SHN_XINDEX 0xffff #define SHN_HIRESERVE 0xffff /* Same, but signed/sign-extended */ #define XSHN_UNDEF ((int16_t)SHN_UNDEF) #define XSHN_LORESERVE ((int16_t)SHN_LORESERVE) #define XSHN_LOPROC ((int16_t)SHN_LOPROC) #define XSHN_HIPROC ((int16_t)SHN_HIPROC) #define XSHN_ABS ((int16_t)SHN_ABS) #define XSHN_COMMON ((int16_t)SHN_COMMON) #define XSHN_XINDEX ((int16_t)SHN_XINDEX) #define XSHN_HIRESERVE ((int16_t)SHN_HIRESERVE) /* Section align flag */ #define SHA_ANY 1 /* No alignment constraint */ /* Lenght of magic at the start of a file */ #define EI_NIDENT 16 /* Magic number constants... */ #define EI_MAG0 0 /* e_ident[] indexes */ #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_OSABI 7 #define EI_ABIVERSION 8 #define EI_NINDENT 16 #define ELFMAG0 0x7f /* EI_MAG */ #define ELFMAG1 'E' #define ELFMAG2 'L' #define ELFMAG3 'F' #define ELFMAG "\177ELF" #define SELFMAG 4 #define ELFCLASSNONE 0 /* EI_CLASS */ #define ELFCLASS32 1 #define ELFCLASS64 2 #define ELFCLASSNUM 3 #define ELFDATANONE 0 /* e_ident[EI_DATA] */ #define ELFDATA2LSB 1 #define ELFDATA2MSB 2 #define EV_NONE 0 /* e_version, EI_VERSION */ #define EV_CURRENT 1 #define EV_NUM 2 #define ELFOSABI_NONE 0 #define ELFOSABI_LINUX 3 /* Legal values for ST_BIND subfield of st_info (symbol binding) */ #define STB_LOCAL 0 /* Local symbol */ #define STB_GLOBAL 1 /* Global symbol */ #define STB_WEAK 2 /* Weak symbol */ #define STB_NUM 3 /* Number of defined types */ #define STB_LOOS 10 /* Start of OS-specific */ #define STB_HIOS 12 /* End of OS-specific */ #define STB_LOPROC 13 /* Start of processor-specific */ #define STB_HIPROC 15 /* End of processor-specific */ /* Symbol types */ #define STT_NOTYPE 0 /* Symbol type is unspecified */ #define STT_OBJECT 1 /* Symbol is a data object */ #define STT_FUNC 2 /* Symbol is a code object */ #define STT_SECTION 3 /* Symbol associated with a section */ #define STT_FILE 4 /* Symbol's name is file name */ #define STT_COMMON 5 /* Symbol is a common data object */ #define STT_TLS 6 /* Symbol is thread-local data object */ #define STT_NUM 7 /* Number of defined types */ /* Symbol visibilities */ #define STV_DEFAULT 0 /* Default symbol visibility rules */ #define STV_INTERNAL 1 /* Processor specific hidden class */ #define STV_HIDDEN 2 /* Sym unavailable in other modules */ #define STV_PROTECTED 3 /* Not preemptible, not exported */ /* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field */ #define ELF32_ST_BIND(i) ((i) >> 4) #define ELF32_ST_MKBIND(i) ((i) << 4) /* just a helper */ #define ELF32_ST_TYPE(i) ((i) & 0xf) #define ELF32_ST_INFO(b, i) (ELF32_ST_MKBIND(b) + ELF32_ST_TYPE(i)) #define ELF64_ST_BIND(i) ELF32_ST_BIND(i) #define ELF64_ST_MKBIND(i) ELF32_ST_MKBIND(i) #define ELF64_ST_TYPE(i) ELF32_ST_TYPE(i) #define ELF64_ST_INFO(b, i) ELF32_ST_INFO(b, i) /* * ELF standard typedefs (yet more proof that was way overdue) */ typedef uint16_t Elf32_Half; typedef int16_t Elf32_SHalf; typedef uint32_t Elf32_Word; typedef int32_t Elf32_Sword; typedef uint64_t Elf32_Xword; typedef int64_t Elf32_Sxword; typedef uint32_t Elf32_Off; typedef uint32_t Elf32_Addr; typedef uint16_t Elf32_Section; typedef uint16_t Elf64_Half; typedef int16_t Elf64_SHalf; typedef uint32_t Elf64_Word; typedef int32_t Elf64_Sword; typedef uint64_t Elf64_Xword; typedef int64_t Elf64_Sxword; typedef uint64_t Elf64_Off; typedef uint64_t Elf64_Addr; typedef uint16_t Elf64_Section; /* * Dynamic header */ typedef struct elf32_dyn { Elf32_Sword d_tag; union { Elf32_Sword d_val; Elf32_Addr d_ptr; } d_un; } Elf32_Dyn; typedef struct elf64_dyn { Elf64_Sxword d_tag; union { Elf64_Xword d_val; Elf64_Addr d_ptr; } d_un; } Elf64_Dyn; /* * Relocations */ #define ELF32_R_SYM(x) ((x) >> 8) #define ELF32_R_TYPE(x) ((x) & 0xff) #define ELF32_R_INFO(s,t) (((Elf32_Word)(s) << 8) + ELF32_R_TYPE(t)) typedef struct elf32_rel { Elf32_Addr r_offset; Elf32_Word r_info; } Elf32_Rel; typedef struct elf32_rela { Elf32_Addr r_offset; Elf32_Word r_info; Elf32_Sword r_addend; } Elf32_Rela; enum reloc32_type { R_386_32 = 1, /* ordinary absolute relocation */ R_386_PC32 = 2, /* PC-relative relocation */ R_386_GOT32 = 3, /* an offset into GOT */ R_386_PLT32 = 4, /* a PC-relative offset into PLT */ R_386_COPY = 5, /* ??? */ R_386_GLOB_DAT = 6, /* ??? */ R_386_JUMP_SLOT = 7, /* ??? */ R_386_RELATIVE = 8, /* ??? */ R_386_GOTOFF = 9, /* an offset from GOT base */ R_386_GOTPC = 10, /* a PC-relative offset _to_ GOT */ R_386_TLS_TPOFF = 14, /* Offset in static TLS block */ R_386_TLS_IE = 15, /* Address of GOT entry for static TLS block offset */ /* These are GNU extensions, but useful */ R_386_16 = 20, /* A 16-bit absolute relocation */ R_386_PC16 = 21, /* A 16-bit PC-relative relocation */ R_386_8 = 22, /* An 8-bit absolute relocation */ R_386_PC8 = 23, /* An 8-bit PC-relative relocation */ R_386_SEG16 = 45, /* A 16-bit real-mode segment */ R_386_SUB16 = 46, /* Subtract 16-bit value */ R_386_SUB32 = 47 /* Subtract 32-bit value */ }; #define ELF64_R_SYM(x) ((x) >> 32) #define ELF64_R_TYPE(x) ((x) & 0xffffffff) #define ELF64_R_INFO(s,t) (((Elf64_Xword)(s) << 32) + ELF64_R_TYPE(t)) typedef struct elf64_rel { Elf64_Addr r_offset; Elf64_Xword r_info; } Elf64_Rel; typedef struct elf64_rela { Elf64_Addr r_offset; Elf64_Xword r_info; Elf64_Sxword r_addend; } Elf64_Rela; enum reloc64_type { R_X86_64_NONE = 0, /* No reloc */ R_X86_64_64 = 1, /* Direct 64 bit */ R_X86_64_PC32 = 2, /* PC relative 32 bit signed */ R_X86_64_GOT32 = 3, /* 32 bit GOT entry */ R_X86_64_PLT32 = 4, /* 32 bit PLT address */ R_X86_64_COPY = 5, /* Copy symbol at runtime */ R_X86_64_GLOB_DAT = 6, /* Create GOT entry */ R_X86_64_JUMP_SLOT = 7, /* Create PLT entry */ R_X86_64_RELATIVE = 8, /* Adjust by program base */ R_X86_64_GOTPCREL = 9, /* 32 bit signed PC relative offset to GOT */ R_X86_64_32 = 10, /* Direct 32 bit zero extended */ R_X86_64_32S = 11, /* Direct 32 bit sign extended */ R_X86_64_16 = 12, /* Direct 16 bit zero extended */ R_X86_64_PC16 = 13, /* 16 bit sign extended pc relative */ R_X86_64_8 = 14, /* Direct 8 bit sign extended */ R_X86_64_PC8 = 15, /* 8 bit sign extended pc relative */ R_X86_64_DTPMOD64 = 16, /* ID of module containing symbol */ R_X86_64_DTPOFF64 = 17, /* Offset in module's TLS block */ R_X86_64_TPOFF64 = 18, /* Offset in initial TLS block */ R_X86_64_TLSGD = 19, /* 32 bit signed PC relative offset to two GOT entries for GD symbol */ R_X86_64_TLSLD = 20, /* 32 bit signed PC relative offset to two GOT entries for LD symbol */ R_X86_64_DTPOFF32 = 21, /* Offset in TLS block */ R_X86_64_GOTTPOFF = 22, /* 32 bit signed PC relative offset to GOT entry for IE symbol */ R_X86_64_TPOFF32 = 23, /* Offset in initial TLS block */ R_X86_64_PC64 = 24, /* word64 S + A - P */ R_X86_64_GOTOFF64 = 25, /* word64 S + A - GOT */ R_X86_64_GOTPC32 = 26, /* word32 GOT + A - P */ R_X86_64_GOT64 = 27, /* word64 G + A */ R_X86_64_GOTPCREL64 = 28, /* word64 G + GOT - P + A */ R_X86_64_GOTPC64 = 29, /* word64 GOT - P + A */ R_X86_64_GOTPLT64 = 30, /* word64 G + A */ R_X86_64_PLTOFF64 = 31, /* word64 L - GOT + A */ R_X86_64_SIZE32 = 32, /* word32 Z + A */ R_X86_64_SIZE64 = 33, /* word64 Z + A */ R_X86_64_GOTPC32_TLSDESC= 34, /* word32 */ R_X86_64_TLSDESC_CALL = 35, /* none */ R_X86_64_TLSDESC = 36 /* word64?2 */ }; /* * Symbol */ typedef 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; } Elf32_Sym; typedef struct elf64_sym { Elf64_Word st_name; unsigned char st_info; unsigned char st_other; Elf64_Half st_shndx; Elf64_Addr st_value; Elf64_Xword st_size; } Elf64_Sym; /* * Main file header */ typedef struct elf32_hdr { 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; } Elf32_Ehdr; typedef struct elf64_hdr { unsigned char e_ident[EI_NIDENT]; Elf64_Half e_type; Elf64_Half e_machine; Elf64_Word e_version; Elf64_Addr e_entry; Elf64_Off e_phoff; Elf64_Off e_shoff; Elf64_Word e_flags; Elf64_Half e_ehsize; Elf64_Half e_phentsize; Elf64_Half e_phnum; Elf64_Half e_shentsize; Elf64_Half e_shnum; Elf64_Half e_shstrndx; } Elf64_Ehdr; /* * Program header */ typedef 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; } Elf32_Phdr; typedef struct elf64_phdr { Elf64_Word p_type; Elf64_Word p_flags; Elf64_Off p_offset; Elf64_Addr p_vaddr; Elf64_Addr p_paddr; Elf64_Xword p_filesz; Elf64_Xword p_memsz; Elf64_Xword p_align; } Elf64_Phdr; /* * Section header */ typedef 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; } Elf32_Shdr; typedef struct elf64_shdr { Elf64_Word sh_name; Elf64_Word sh_type; Elf64_Xword sh_flags; Elf64_Addr sh_addr; Elf64_Off sh_offset; Elf64_Xword sh_size; Elf64_Word sh_link; Elf64_Word sh_info; Elf64_Xword sh_addralign; Elf64_Xword sh_entsize; } Elf64_Shdr; /* * Note header */ typedef struct elf32_note { Elf32_Word n_namesz; /* Name size */ Elf32_Word n_descsz; /* Content size */ Elf32_Word n_type; /* Content type */ } Elf32_Nhdr; typedef struct elf64_note { Elf64_Word n_namesz; /* Name size */ Elf64_Word n_descsz; /* Content size */ Elf64_Word n_type; /* Content type */ } Elf64_Nhdr; #endif /* OUTPUT_ELF_H */