320 lines
11 KiB
C
320 lines
11 KiB
C
/* output_elf.h header file for ELF objects */
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/* (c) in 2002-2016 by Frank Wille */
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/* e_indent indexes */
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#define EI_NIDENT 16
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#define EI_MAG0 0
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#define EI_MAG1 1
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#define EI_MAG2 2
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#define EI_MAG3 3
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#define EI_CLASS 4
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#define EI_DATA 5
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#define EI_VERSION 6
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#define EI_PAD 7
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/* EI_CLASS */
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#define ELFCLASSNONE 0
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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/* EI_DATA */
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#define ELFDATANONE 0
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#define ELFDATA2LSB 1
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#define ELFDATA2MSB 2
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/* e_type */
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#define ET_NONE 0 /* No file type */
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#define ET_REL 1 /* Relocatable file */
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#define ET_EXEC 2 /* Executable file */
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#define ET_DYN 3 /* Shared object file */
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#define ET_CORE 4 /* Core file */
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#define ET_LOPROC 0xFF00 /* Processor-specific */
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#define ET_HIPROC 0xFFFF /* Processor-specific */
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/* e_version */
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#define EV_NONE 0
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#define EV_CURRENT 1
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/* e_machine */
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#define EM_NONE 0
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#define EM_M32 1
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#define EM_SPARC 2
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#define EM_386 3
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#define EM_68K 4
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#define EM_88K 5
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#define EM_860 7
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#define EM_MIPS 8
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#define EM_MIPS_RS4_BE 10
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#define EM_SPARC64 11
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#define EM_PARISC 15
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#define EM_PPC_OLD 17
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#define EM_SPARC32PLUS 18
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#define EM_PPC 20
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#define EM_ARM 40
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#define EM_X86_64 62
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#define EM_JAGRISC 0x9004
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#define EM_CYGNUS_POWERPC 0x9025
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#define EM_ALPHA 0x9026
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/* special sections indexes */
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#define SHN_UNDEF 0
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#define SHN_ABS 0xfff1
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#define SHN_COMMON 0xfff2
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/* sh_type */
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#define SHT_NULL 0 /* Section header table entry unused */
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#define SHT_PROGBITS 1 /* Program specific (private) data */
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#define SHT_SYMTAB 2 /* Link editing symbol table */
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#define SHT_STRTAB 3 /* A string table */
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#define SHT_RELA 4 /* Relocation entries with addends */
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#define SHT_HASH 5 /* A symbol hash table */
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#define SHT_DYNAMIC 6 /* Information for dynamic linking */
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#define SHT_NOTE 7 /* Information that marks file */
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#define SHT_NOBITS 8 /* Section occupies no space in file */
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#define SHT_REL 9 /* Relocation entries, no addends */
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#define SHT_SHLIB 10 /* Reserved, unspecified semantics */
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#define SHT_DYNSYM 11 /* Dynamic linking symbol table */
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#define SHT_LOPROC 0x70000000 /* Processor-specific semantics, lo */
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#define SHT_HIPROC 0x7FFFFFFF /* Processor-specific semantics, hi */
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#define SHT_LOUSER 0x80000000 /* Application-specific semantics */
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#define SHT_HIUSER 0x8FFFFFFF /* Application-specific semantics */
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/* sh_flags */
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#define SHF_WRITE (1 << 0) /* Writable data during execution */
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#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
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#define SHF_EXECINSTR (1 << 2) /* Executable machine instructions */
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#define SHF_MASKPROC 0xF0000000 /* Processor-specific semantics */
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/* ST_BIND */
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#define STB_LOCAL 0 /* Symbol not visible outside obj */
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#define STB_GLOBAL 1 /* Symbol visible outside obj */
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#define STB_WEAK 2 /* Like globals, lower precedence */
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#define STB_LOPROC 13 /* Application-specific semantics */
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#define STB_HIPROC 15 /* Application-specific semantics */
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/* ST_TYPE */
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#define STT_NOTYPE 0 /* Symbol type is unspecified */
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#define STT_OBJECT 1 /* Symbol is a data object */
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#define STT_FUNC 2 /* Symbol is a code object */
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#define STT_SECTION 3 /* Symbol associated with a section */
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#define STT_FILE 4 /* Symbol gives a file name */
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#define STT_LOPROC 13 /* Application-specific semantics */
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#define STT_HIPROC 15 /* Application-specific semantics */
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/* 32-bit ELF */
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struct Elf32_Ehdr {
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uint8_t e_ident[EI_NIDENT]; /* ELF "magic number" */
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uint8_t e_type[2]; /* Identifies object file type */
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uint8_t e_machine[2]; /* Specifies required architecture */
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uint8_t e_version[4]; /* Identifies object file version */
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uint8_t e_entry[4]; /* Entry point virtual address */
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uint8_t e_phoff[4]; /* Program header table file offset */
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uint8_t e_shoff[4]; /* Section header table file offset */
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uint8_t e_flags[4]; /* Processor-specific flags */
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uint8_t e_ehsize[2]; /* ELF header size in bytes */
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uint8_t e_phentsize[2]; /* Program header table entry size */
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uint8_t e_phnum[2]; /* Program header table entry count */
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uint8_t e_shentsize[2]; /* Section header table entry size */
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uint8_t e_shnum[2]; /* Section header table entry count */
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uint8_t e_shstrndx[2]; /* Section header string table index */
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};
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struct Elf32_Shdr {
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uint8_t sh_name[4]; /* Section name, index in string tbl */
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uint8_t sh_type[4]; /* Type of section */
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uint8_t sh_flags[4]; /* Miscellaneous section attributes */
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uint8_t sh_addr[4]; /* Section virtual addr at execution */
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uint8_t sh_offset[4]; /* Section file offset */
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uint8_t sh_size[4]; /* Size of section in bytes */
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uint8_t sh_link[4]; /* Index of another section */
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uint8_t sh_info[4]; /* Additional section information */
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uint8_t sh_addralign[4]; /* Section alignment */
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uint8_t sh_entsize[4]; /* Entry size if section holds table */
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};
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struct Elf32_Sym {
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uint8_t st_name[4]; /* Symbol name, index in string tbl */
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uint8_t st_value[4]; /* Value of the symbol */
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uint8_t st_size[4]; /* Associated symbol size */
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uint8_t st_info[1]; /* Type and binding attributes */
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uint8_t st_other[1]; /* No defined meaning, 0 */
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uint8_t st_shndx[2]; /* Associated section index */
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};
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/* st_info */
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#define ELF32_ST_BIND(i) ((i)>>4)
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#define ELF32_ST_TYPE(i) ((i)&0xf)
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#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
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struct Elf32_Note {
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uint8_t namesz[4]; /* Size of entry's owner string */
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uint8_t descsz[4]; /* Size of the note descriptor */
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uint8_t type[4]; /* Interpretation of the descriptor */
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char name[1]; /* Start of the name+desc data */
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};
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struct Elf32_Rel {
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uint8_t r_offset[4]; /* Location at which to apply the action */
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uint8_t r_info[4]; /* index and type of relocation */
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};
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struct Elf32_Rela {
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uint8_t r_offset[4]; /* Location at which to apply the action */
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uint8_t r_info[4]; /* index and type of relocation */
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uint8_t r_addend[4]; /* Constant addend used to compute value */
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};
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/* r_info */
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#define ELF32_R_SYM(i) ((i)>>8)
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#define ELF32_R_TYPE(i) ((uint8_t)(i))
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#define ELF32_R_INFO(s,t) (((s)<<8)+(uint8_t)(t))
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/* 64-bit ELF */
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struct Elf64_Ehdr {
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uint8_t e_ident[EI_NIDENT]; /* ELF "magic number" */
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uint8_t e_type[2]; /* Identifies object file type */
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uint8_t e_machine[2]; /* Specifies required architecture */
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uint8_t e_version[4]; /* Identifies object file version */
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uint8_t e_entry[8]; /* Entry point virtual address */
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uint8_t e_phoff[8]; /* Program header table file offset */
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uint8_t e_shoff[8]; /* Section header table file offset */
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uint8_t e_flags[4]; /* Processor-specific flags */
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uint8_t e_ehsize[2]; /* ELF header size in bytes */
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uint8_t e_phentsize[2]; /* Program header table entry size */
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uint8_t e_phnum[2]; /* Program header table entry count */
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uint8_t e_shentsize[2]; /* Section header table entry size */
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uint8_t e_shnum[2]; /* Section header table entry count */
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uint8_t e_shstrndx[2]; /* Section header string table index */
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};
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struct Elf64_Shdr {
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uint8_t sh_name[4]; /* Section name, index in string tbl */
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uint8_t sh_type[4]; /* Type of section */
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uint8_t sh_flags[8]; /* Miscellaneous section attributes */
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uint8_t sh_addr[8]; /* Section virtual addr at execution */
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uint8_t sh_offset[8]; /* Section file offset */
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uint8_t sh_size[8]; /* Size of section in bytes */
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uint8_t sh_link[4]; /* Index of another section */
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uint8_t sh_info[4]; /* Additional section information */
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uint8_t sh_addralign[8]; /* Section alignment */
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uint8_t sh_entsize[8]; /* Entry size if section holds table */
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};
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struct Elf64_Sym {
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uint8_t st_name[4]; /* Symbol name, index in string tbl */
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uint8_t st_info[1]; /* Type and binding attributes */
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uint8_t st_other[1]; /* No defined meaning, 0 */
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uint8_t st_shndx[2]; /* Associated section index */
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uint8_t st_value[8]; /* Value of the symbol */
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uint8_t st_size[8]; /* Associated symbol size */
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};
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#define ELF64_ST_BIND(i) ((i)>>4)
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#define ELF64_ST_TYPE(i) ((i)&0xf)
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#define ELF64_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
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struct Elf64_Note {
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uint8_t namesz[4]; /* Size of entry's owner string */
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uint8_t descsz[4]; /* Size of the note descriptor */
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uint8_t type[4]; /* Interpretation of the descriptor */
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char name[1]; /* Start of the name+desc data */
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};
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struct Elf64_Rel {
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uint8_t r_offset[8]; /* Location at which to apply the action */
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uint8_t r_info[8]; /* index and type of relocation */
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};
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struct Elf64_Rela {
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uint8_t r_offset[8]; /* Location at which to apply the action */
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uint8_t r_info[8]; /* index and type of relocation */
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uint8_t r_addend[8]; /* Constant addend used to compute value */
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};
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#define ELF64_R_SYM(i) ((i) >> 32)
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#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
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#define ELF64_R_INFO(sym,type) (((sym) << 32) + (type))
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/* vasm-specific extensions */
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typedef uint64_t elfull;
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struct StrTabList {
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struct list l;
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unsigned index;
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};
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struct StrTabNode {
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struct node n;
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char *str;
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};
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struct Shdr32Node {
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struct node n;
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struct Elf32_Shdr s;
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};
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struct Symbol32Node {
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struct node n;
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char *name;
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unsigned idx;
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struct Elf32_Sym s;
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};
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struct Rela32Node {
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struct node n;
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struct Elf32_Rela r;
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};
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struct Rel32Node {
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struct node n;
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struct Elf32_Rel r;
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};
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struct Shdr64Node {
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struct node n;
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struct Elf64_Shdr s;
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};
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struct Symbol64Node {
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struct node n;
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char *name;
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unsigned idx;
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struct Elf64_Sym s;
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};
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struct Rela64Node {
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struct node n;
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struct Elf64_Rela r;
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};
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struct Rel64Node {
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struct node n;
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struct Elf64_Rel r;
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};
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#if defined(VASM_CPU_M68K)
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#define RELA 1
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#define ELFCPU EM_68K
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#elif defined(VASM_CPU_PPC)
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#define RELA 1
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#define ELFCPU EM_PPC
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#elif defined(VASM_CPU_ARM)
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#define RELA 0
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#define ELFCPU EM_ARM
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#elif defined(VASM_CPU_X86)
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#define RELA (bytespertaddr == 8)
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#define ELFCPU (bytespertaddr == 8 ? EM_X86_64 : EM_386)
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#elif defined(VASM_CPU_JAGRISC)
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#define RELA 1
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#define ELFCPU EM_JAGRISC
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#else
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#define ELFCPU 0
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#endif
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#define ELFSYMHTABSIZE 0x10000
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