John Gilmore
35 years ago
1 changed files with 226 additions and 0 deletions
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/* IBM RS/6000 "XCOFF" file definitions for BFD.
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Copyright (C) 1990, 1991 Free Software Foundation, Inc. |
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Written by Mimi Phûông-Thåo Võ and John Gilmore. |
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Contributed by IBM Corporation and Cygnus Support. |
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/********************** FILE HEADER **********************/ |
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struct external_filehdr { |
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char f_magic[2]; /* magic number */ |
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char f_nscns[2]; /* number of sections */ |
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char f_timdat[4]; /* time & date stamp */ |
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char f_symptr[4]; /* file pointer to symtab */ |
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char f_nsyms[4]; /* number of symtab entries */ |
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char f_opthdr[2]; /* sizeof(optional hdr) */ |
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char f_flags[2]; /* flags */ |
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}; |
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/* IBM RS/6000 */ |
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#define U802WRMAGIC 0730 /* writeable text segments **chh** */ |
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#define U802ROMAGIC 0735 /* readonly sharable text segments */ |
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#define U802TOCMAGIC 0737 /* readonly text segments and TOC */ |
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#define BADMAG(x) \ |
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((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ |
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(x).f_magic != U802TOCMAGIC) |
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#define FILHDR struct external_filehdr |
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#define FILHSZ sizeof(FILHDR) |
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/********************** AOUT "OPTIONAL HEADER" **********************/ |
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typedef struct |
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{ |
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char magic[2]; /* type of file */ |
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char vstamp[2]; /* version stamp */ |
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char tsize[4]; /* text size in bytes, padded to FW bdry*/ |
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char dsize[4]; /* initialized data " " */ |
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char bsize[4]; /* uninitialized data " " */ |
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char entry[4]; /* entry pt. */ |
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char text_start[4]; /* base of text used for this file */ |
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char data_start[4]; /* base of data used for this file */ |
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char o_toc[4]; |
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char o_snentry[2]; |
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char o_sntext[2]; |
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char o_sndata[2]; |
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char o_sntoc[2]; |
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char o_snloader[2]; |
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char o_snbss[2]; |
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char o_algntext[2]; |
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char o_algndata[2]; |
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char o_modtype[2]; |
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char o_resv1[2]; |
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char o_maxstack[4]; |
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char o_resv2[16]; |
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} |
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AOUTHDR; |
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#define AOUTSZ (sizeof(AOUTHDR)) |
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#define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ |
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#define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ |
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#define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ |
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/********************** SECTION HEADER **********************/ |
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struct external_scnhdr { |
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char s_name[8]; /* section name */ |
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char s_paddr[4]; /* physical address, aliased s_nlib */ |
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char s_vaddr[4]; /* virtual address */ |
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char s_size[4]; /* section size */ |
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char s_scnptr[4]; /* file ptr to raw data for section */ |
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char s_relptr[4]; /* file ptr to relocation */ |
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char s_lnnoptr[4]; /* file ptr to line numbers */ |
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char s_nreloc[2]; /* number of relocation entries */ |
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char s_nlnno[2]; /* number of line number entries*/ |
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char s_flags[4]; /* flags */ |
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}; |
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/*
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* names of "special" sections |
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*/ |
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#define _TEXT ".text" |
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#define _DATA ".data" |
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#define _BSS ".bss" |
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#define SCNHDR struct external_scnhdr |
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#define SCNHSZ sizeof(SCNHDR) |
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/********************** LINE NUMBERS **********************/ |
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/* 1 line number entry for every "breakpointable" source line in a section.
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* Line numbers are grouped on a per function basis; first entry in a function |
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* grouping will have l_lnno = 0 and in place of physical address will be the |
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* symbol table index of the function name. |
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*/ |
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struct external_lineno { |
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union { |
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char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ |
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char l_paddr[4]; /* (physical) address of line number */ |
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} l_addr; |
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char l_lnno[2]; /* line number */ |
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}; |
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#define LINENO struct external_lineno |
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#define LINESZ sizeof(LINENO) |
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/********************** SYMBOLS **********************/ |
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#define E_SYMNMLEN 8 /* # characters in a symbol name */ |
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#define E_FILNMLEN 14 /* # characters in a file name */ |
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#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ |
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struct external_syment |
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{ |
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union { |
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char e_name[E_SYMNMLEN]; |
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struct { |
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char e_zeroes[4]; |
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char e_offset[4]; |
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} e; |
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} e; |
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char e_value[4]; |
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char e_scnum[2]; |
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char e_type[2]; |
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char e_sclass[1]; |
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char e_numaux[1]; |
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}; |
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#define N_BTMASK (017) |
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#define N_TMASK (060) |
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#define N_BTSHFT (4) |
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#define N_TSHIFT (2) |
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union external_auxent { |
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struct { |
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char x_tagndx[4]; /* str, un, or enum tag indx */ |
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union { |
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struct { |
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char x_lnno[2]; /* declaration line number */ |
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char x_size[2]; /* str/union/array size */ |
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} x_lnsz; |
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char x_fsize[4]; /* size of function */ |
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} x_misc; |
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union { |
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struct { /* if ISFCN, tag, or .bb */ |
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char x_lnnoptr[4]; /* ptr to fcn line # */ |
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char x_endndx[4]; /* entry ndx past block end */ |
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} x_fcn; |
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struct { /* if ISARY, up to 4 dimen. */ |
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char x_dimen[E_DIMNUM][2]; |
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} x_ary; |
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} x_fcnary; |
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char x_tvndx[2]; /* tv index */ |
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} x_sym; |
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union { |
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char x_fname[E_FILNMLEN]; |
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struct { |
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char x_zeroes[4]; |
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char x_offset[4]; |
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} x_n; |
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} x_file; |
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struct { |
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char x_scnlen[4]; /* section length */ |
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char x_nreloc[2]; /* # relocation entries */ |
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char x_nlinno[2]; /* # line numbers */ |
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} x_scn; |
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struct { |
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char x_tvfill[4]; /* tv fill value */ |
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char x_tvlen[2]; /* length of .tv */ |
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char x_tvran[2][2]; /* tv range */ |
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} x_tv; /* info about .tv section (in auxent of symbol .tv)) */ |
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struct { |
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char x_scnlen[4], |
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x_parmhash[4], |
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x_snhash[2], |
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x_smtyp[1], |
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x_smclas[1], |
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x_stab[4], |
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x_snstab[2]; |
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} x_csect; |
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}; |
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#define SYMENT struct external_syment |
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#define SYMESZ 18 |
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#define AUXENT union external_auxent |
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#define AUXESZ 18 |
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#define DBXMASK 0x80 /* for dbx storage mask */ |
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#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) |
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/********************** RELOCATION DIRECTIVES **********************/ |
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struct external_reloc { |
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char r_vaddr[4]; |
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char r_symndx[4]; |
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char r_size[1]; |
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char r_type[1]; |
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}; |
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#define RELOC struct external_reloc |
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#define RELSZ 10 |
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#define DEFAULT_DATA_SECTION_ALIGNMENT 4 |
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#define DEFAULT_BSS_SECTION_ALIGNMENT 4 |
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#define DEFAULT_TEXT_SECTION_ALIGNMENT 4 |
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/* For new sections we havn't heard of before */ |
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#define DEFAULT_SECTION_ALIGNMENT 4 |
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