1 /* 2 * m68k a.out / ELF file structure definitions 3 * 4 * written by ITOH Yasufumi 5 * public domain 6 * 7 * $NetBSD: aout68k.h,v 1.4 2011/02/21 02:31:58 itohy Exp $ 8 */ 9 /* 10 * NetBSD/m68k a.out format (OMAGIC, NMAGIC) 11 * 12 * ---------------------------- 13 * | file header (32 bytes) | 14 * |--------------------------| 15 * | text | 16 * |--------------------------| 17 * | data | 18 * |--------------------------| 19 * | text relocation table | 20 * |--------------------------| 21 * | data relocation table | 22 * |--------------------------| 23 * | symbol table | 24 * |--------------------------| 25 * | string table | 26 * ---------------------------- 27 * 28 * OMAGIC: text and data segments are loaded contiguous 29 * NMAGIC: data segment is loaded at the next page of the text 30 */ 31 32 struct aout_m68k { 33 be_uint32_t a_magic; /* encoded magic number */ 34 be_uint32_t a_text; /* size of text section */ 35 be_uint32_t a_data; /* size of data section */ 36 be_uint32_t a_bss; /* size of bss */ 37 be_uint32_t a_syms; /* size of symbol table */ 38 be_uint32_t a_entry; /* entry point address */ 39 be_uint32_t a_trsize; /* size of text relocation */ 40 be_uint32_t a_drsize; /* size of data relocation */ 41 }; 42 43 #define AOUT_GET_MAGIC(e) (((e)->a_magic.val[2]<<8) | (e)->a_magic.val[3]) 44 #define AOUT_OMAGIC 0407 45 #define AOUT_NMAGIC 0410 46 #define AOUT_ZMAGIC 0413 /* demand paging --- header is in the text */ 47 48 #define AOUT_GET_FLAGS(e) ((e)->a_magic.val[0] >> 2) 49 #define AOUT_FLAG_PIC 0x10 50 #define AOUT_FLAG_DYNAMIC 0x20 51 52 /* machine ID */ 53 #define AOUT_GET_MID(e) ((((e)->a_magic.val[0] & 0x03) << 8) | \ 54 (e)->a_magic.val[1]) 55 #define AOUT_MID_M68K 135 /* m68k BSD binary, 8KB page */ 56 #define AOUT_MID_M68K4K 136 /* m68k BSD binary, 4KB page */ 57 58 #define AOUT_PAGESIZE(e) (AOUT_GET_MAGIC(e) == AOUT_OMAGIC ? 1 : \ 59 AOUT_GET_MID(e) == AOUT_MID_M68K ? 8192 : 4096) 60 61 /* 62 * m68k ELF executable format 63 * 64 * -------------------------------------- 65 * | ELF header (52 bytes) | 66 * |------------------------------------| 67 * | Program header (32bytes x 1 or 2) | 68 * |------------------------------------| 69 * | section 1 (text) | 70 * |------------------------------------| 71 * | section 2 (data) | 72 * |------------------------------------| 73 * | ... | 74 * |------------------------------------| 75 * | section header table (optional) | 76 * -------------------------------------- 77 */ 78 79 /* 80 * ELF header for m68k 81 */ 82 struct elf_m68k_hdr { 83 #define EI_MAG0 0 84 #define EI_MAG1 1 85 #define EI_MAG2 2 86 #define EI_MAG3 3 87 #define EI_CLASS 4 88 #define EI_DATA 5 89 #define EI_VERSION 6 90 #define EL_NIDENT 16 91 u_int8_t e_ident[EL_NIDENT]; /* ELF magic */ 92 #define ELFMAG0 0x7f 93 #define ELFMAG1 0x45 /* 'E' */ 94 #define ELFMAG2 0x4c /* 'L' */ 95 #define ELFMAG3 0x46 /* 'F' */ 96 #define ELFCLASS32 1 /* 32bit */ 97 #define ELFDATA2MSB 2 /* big endian */ 98 be_uint16_t e_type; /* type of this file */ 99 #define ET_EXEC 2 100 be_uint16_t e_machine; /* architecture id */ 101 #define EM_68K 4 102 be_uint32_t e_version; 103 #define EV_CURRENT 1 104 be_uint32_t e_entry; /* entry address */ 105 be_uint32_t e_phoff; /* program header address */ 106 be_uint32_t e_shoff; 107 be_uint32_t e_flags; 108 be_uint16_t e_ehsize; 109 be_uint16_t e_phentsize; /* program header entry size */ 110 be_uint16_t e_phnum; /* number of program header entries */ 111 be_uint16_t e_shentsize; /* section header entry size */ 112 be_uint16_t e_shnum; /* number of section header entries */ 113 be_uint16_t e_shstrndx; 114 }; 115 116 #define SIZE_ELF68K_HDR (sizeof(struct elf_m68k_hdr)) 117 118 /* 119 * Section header for m68k ELF 120 */ 121 struct elf_m68k_shdr { 122 be_uint32_t sh_name; 123 be_uint32_t sh_type; 124 #define SHT_PROGBITS 1 125 be_uint32_t sh_flags; 126 #define SHF_WRITE 1 127 #define SHF_ALLOC 2 128 #define SHF_EXECINSTR 4 129 be_uint32_t sh_addr; 130 be_uint32_t sh_offset; 131 be_uint32_t sh_size; 132 be_uint32_t sh_link; 133 be_uint32_t sh_info; 134 be_uint32_t sh_addralign; 135 be_uint32_t sh_entsize; 136 }; 137 138 #define ELF68K_ISDATASEG(sh) \ 139 (get_uint32(&(sh)->sh_type) == SHT_PROGBITS && \ 140 (get_uint32(&(sh)->sh_flags) & \ 141 (SHF_WRITE | SHF_ALLOC | SHF_EXECINSTR)) == \ 142 (SHF_WRITE | SHF_ALLOC)) /* no SHF_EXECINSTR */ 143 144 #define SIZE_ELF68K_SHDR (sizeof(struct elf_m68k_shdr)) 145 146 /* 147 * Program header for m68k ELF 148 */ 149 struct elf_m68k_phdr { 150 be_uint32_t p_type; /* type of segment */ 151 #define PT_LOAD 1 152 be_uint32_t p_offset; /* file offset */ 153 be_uint32_t p_vaddr; /* virtual address */ 154 be_uint32_t p_paddr; /* physical address (ignored) */ 155 be_uint32_t p_filesz; /* size on file */ 156 be_uint32_t p_memsz; /* size on memory */ 157 be_uint32_t p_flags; 158 #define PF_R 4 159 #define PF_W 2 160 #define PF_X 1 161 be_uint32_t p_align; 162 }; 163 164 #define SIZE_ELF68K_PHDR (sizeof(struct elf_m68k_phdr)) 165