| 1 | /* IBM RS/6000 "XCOFF64" file definitions for BFD. |
| 2 | Copyright (C) 2000 Free Software Foundation, Inc. */ |
| 3 | |
| 4 | /********************** FILE HEADER **********************/ |
| 5 | |
| 6 | struct external_filehdr { |
| 7 | char f_magic[2]; /* magic number */ |
| 8 | char f_nscns[2]; /* number of sections */ |
| 9 | char f_timdat[4]; /* time & date stamp */ |
| 10 | char f_symptr[8];/* file pointer to symtab */ |
| 11 | char f_opthdr[2]; /* sizeof(optional hdr) */ |
| 12 | char f_flags[2]; /* flags */ |
| 13 | char f_nsyms[4]; /* number of symtab entries */ |
| 14 | }; |
| 15 | |
| 16 | /* IBM RS/6000 */ |
| 17 | #define U803XTOCMAGIC 0757 /* readonly text segments and TOC, XCOFF64 */ |
| 18 | |
| 19 | #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC) |
| 20 | |
| 21 | #define FILHDR struct external_filehdr |
| 22 | #define FILHSZ 24 |
| 23 | |
| 24 | /********************** AOUT "OPTIONAL HEADER" **********************/ |
| 25 | |
| 26 | |
| 27 | typedef struct |
| 28 | { |
| 29 | unsigned char magic[2]; /* type of file */ |
| 30 | unsigned char vstamp[2]; /* version stamp */ |
| 31 | unsigned char o_debugger[4]; /* reserved */ |
| 32 | unsigned char text_start[8]; /* base of text used for this file */ |
| 33 | unsigned char data_start[8]; /* base of data used for this file */ |
| 34 | unsigned char o_toc[8]; /* address of TOC */ |
| 35 | unsigned char o_snentry[2]; /* section number of entry point */ |
| 36 | unsigned char o_sntext[2]; /* section number of .text section */ |
| 37 | unsigned char o_sndata[2]; /* section number of .data section */ |
| 38 | unsigned char o_sntoc[2]; /* section number of TOC */ |
| 39 | unsigned char o_snloader[2]; /* section number of .loader section */ |
| 40 | unsigned char o_snbss[2]; /* section number of .bss section */ |
| 41 | unsigned char o_algntext[2]; /* .text alignment */ |
| 42 | unsigned char o_algndata[2]; /* .data alignment */ |
| 43 | unsigned char o_modtype[2]; /* module type (??) */ |
| 44 | unsigned char o_cputype[2]; /* cpu type */ |
| 45 | unsigned char o_resv2[4]; /* reserved */ |
| 46 | unsigned char tsize[8]; /* text size bytes, padded to FW bdry */ |
| 47 | unsigned char dsize[8]; /* initialized data " " */ |
| 48 | unsigned char bsize[8]; /* uninitialized data " " */ |
| 49 | unsigned char entry[8]; /* entry pt. */ |
| 50 | unsigned char o_maxstack[8]; /* max stack size (??) */ |
| 51 | unsigned char o_maxdata[8]; /* max data size (??) */ |
| 52 | unsigned char o_resv3[16]; /* reserved */ |
| 53 | } |
| 54 | AOUTHDR; |
| 55 | |
| 56 | #define AOUTSZ 120 |
| 57 | #define SMALL_AOUTSZ (0) |
| 58 | #define AOUTHDRSZ 72 |
| 59 | |
| 60 | #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ |
| 61 | #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ |
| 62 | #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ |
| 63 | |
| 64 | |
| 65 | /********************** SECTION HEADER **********************/ |
| 66 | |
| 67 | |
| 68 | struct external_scnhdr { |
| 69 | char s_name[8]; /* section name */ |
| 70 | char s_paddr[8]; /* physical address, aliased s_nlib */ |
| 71 | char s_vaddr[8]; /* virtual address */ |
| 72 | char s_size[8]; /* section size */ |
| 73 | char s_scnptr[8]; /* file ptr to raw data for section */ |
| 74 | char s_relptr[8]; /* file ptr to relocation */ |
| 75 | char s_lnnoptr[8]; /* file ptr to line numbers */ |
| 76 | char s_nreloc[4]; /* number of relocation entries */ |
| 77 | char s_nlnno[4]; /* number of line number entries*/ |
| 78 | char s_flags[4]; /* flags */ |
| 79 | char s_pad[4]; /* padding */ |
| 80 | }; |
| 81 | |
| 82 | /* |
| 83 | * names of "special" sections |
| 84 | */ |
| 85 | #define _TEXT ".text" |
| 86 | #define _DATA ".data" |
| 87 | #define _BSS ".bss" |
| 88 | #define _PAD ".pad" |
| 89 | #define _LOADER ".loader" |
| 90 | |
| 91 | #define SCNHDR struct external_scnhdr |
| 92 | |
| 93 | #define SCNHSZ 72 |
| 94 | |
| 95 | /* XCOFF uses a special .loader section with type STYP_LOADER. */ |
| 96 | #define STYP_LOADER 0x1000 |
| 97 | |
| 98 | /* XCOFF uses a special .debug section with type STYP_DEBUG. */ |
| 99 | #define STYP_DEBUG 0x2000 |
| 100 | |
| 101 | /* XCOFF handles line number or relocation overflow by creating |
| 102 | another section header with STYP_OVRFLO set. */ |
| 103 | #define STYP_OVRFLO 0x8000 |
| 104 | |
| 105 | /********************** LINE NUMBERS **********************/ |
| 106 | |
| 107 | /* 1 line number entry for every "breakpointable" source line in a section. |
| 108 | * Line numbers are grouped on a per function basis; first entry in a function |
| 109 | * grouping will have l_lnno = 0 and in place of physical address will be the |
| 110 | * symbol table index of the function name. |
| 111 | */ |
| 112 | struct external_lineno { |
| 113 | union { |
| 114 | char l_symndx[8];/* function name symbol index, iff l_lnno == 0*/ |
| 115 | char l_paddr[8]; /* (physical) address of line number */ |
| 116 | } l_addr; |
| 117 | char l_lnno[4]; /* line number */ |
| 118 | }; |
| 119 | |
| 120 | |
| 121 | #define LINENO struct external_lineno |
| 122 | |
| 123 | #define LINESZ 12 |
| 124 | |
| 125 | |
| 126 | /********************** SYMBOLS **********************/ |
| 127 | |
| 128 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ |
| 129 | #define E_FILNMLEN 14 /* # characters in a file name */ |
| 130 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ |
| 131 | |
| 132 | struct external_syment |
| 133 | { |
| 134 | union { |
| 135 | char e_value[8]; |
| 136 | } e; |
| 137 | char e_offset[4]; |
| 138 | char e_scnum[2]; |
| 139 | char e_type[2]; |
| 140 | char e_sclass[1]; |
| 141 | char e_numaux[1]; |
| 142 | }; |
| 143 | |
| 144 | |
| 145 | |
| 146 | #define N_BTMASK (017) |
| 147 | #define N_TMASK (060) |
| 148 | #define N_BTSHFT (4) |
| 149 | #define N_TSHIFT (2) |
| 150 | |
| 151 | |
| 152 | union external_auxent { |
| 153 | |
| 154 | struct { |
| 155 | union { |
| 156 | struct { |
| 157 | char x_lnno[4]; /* declaration line number */ |
| 158 | char x_size[2]; /* str/union/array size */ |
| 159 | } x_lnsz; |
| 160 | struct { |
| 161 | char x_lnnoptr[8];/* ptr to fcn line */ |
| 162 | char x_fsize[4]; /* size of function */ |
| 163 | char x_endndx[4]; /* entry ndx past block end */ |
| 164 | } x_fcn; |
| 165 | } x_fcnary; |
| 166 | } x_sym; |
| 167 | |
| 168 | union { |
| 169 | char x_fname[E_FILNMLEN]; |
| 170 | struct { |
| 171 | char x_zeroes[4]; |
| 172 | char x_offset[4]; |
| 173 | char x_pad[6]; |
| 174 | unsigned char x_ftype[1]; |
| 175 | unsigned char x_resv[2]; |
| 176 | } x_n; |
| 177 | } x_file; |
| 178 | |
| 179 | struct { |
| 180 | char x_exptr[8]; |
| 181 | char x_fsize[4]; |
| 182 | char x_endndx[4]; |
| 183 | char x_pad[1]; |
| 184 | } x_except; |
| 185 | |
| 186 | struct { |
| 187 | unsigned char x_scnlen_lo[4]; |
| 188 | unsigned char x_parmhash[4]; |
| 189 | unsigned char x_snhash[2]; |
| 190 | unsigned char x_smtyp[1]; |
| 191 | unsigned char x_smclas[1]; |
| 192 | unsigned char x_scnlen_hi[4]; |
| 193 | unsigned char x_pad[1]; |
| 194 | } x_csect; |
| 195 | |
| 196 | struct { |
| 197 | char x_pad[17]; |
| 198 | char x_auxtype[1]; |
| 199 | } x_auxtype; |
| 200 | }; |
| 201 | |
| 202 | #define SYMENT struct external_syment |
| 203 | #define SYMESZ 18 |
| 204 | #define AUXENT union external_auxent |
| 205 | #define AUXESZ 18 |
| 206 | #define DBXMASK 0x80 /* for dbx storage mask */ |
| 207 | #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) |
| 208 | |
| 209 | /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */ |
| 210 | #define _AUX_EXCEPT 255 |
| 211 | #define _AUX_FCN 254 |
| 212 | #define _AUX_SYM 253 |
| 213 | #define _AUX_FILE 252 |
| 214 | #define _AUX_CSECT 251 |
| 215 | |
| 216 | |
| 217 | |
| 218 | /********************** RELOCATION DIRECTIVES **********************/ |
| 219 | |
| 220 | |
| 221 | struct external_reloc { |
| 222 | char r_vaddr[8]; |
| 223 | char r_symndx[4]; |
| 224 | char r_size[1]; |
| 225 | char r_type[1]; |
| 226 | }; |
| 227 | |
| 228 | |
| 229 | #define RELOC struct external_reloc |
| 230 | #define RELSZ 14 |
| 231 | |
| 232 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 |
| 233 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 |
| 234 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 |
| 235 | /* For new sections we havn't heard of before */ |
| 236 | #define DEFAULT_SECTION_ALIGNMENT 4 |