356 lines
9 KiB
C
356 lines
9 KiB
C
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/* IBM RS/6000 "XCOFF" file definitions for BFD.
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Copyright (C) 1990-2022 Free Software Foundation, Inc.
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Written by Mimi Phuong-Thao Vo of IBM
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and John Gilmore of Cygnus Support.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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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 20
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/********************** AOUT "OPTIONAL HEADER" **********************/
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typedef struct
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{
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unsigned char magic[2]; /* type of file */
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unsigned char vstamp[2]; /* version stamp */
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unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */
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unsigned char dsize[4]; /* initialized data " " */
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unsigned char bsize[4]; /* uninitialized data " " */
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unsigned char entry[4]; /* entry pt. */
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unsigned char text_start[4]; /* base of text used for this file */
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unsigned char data_start[4]; /* base of data used for this file */
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unsigned char o_toc[4]; /* address of TOC */
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unsigned char o_snentry[2]; /* section number of entry point */
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unsigned char o_sntext[2]; /* section number of .text section */
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unsigned char o_sndata[2]; /* section number of .data section */
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unsigned char o_sntoc[2]; /* section number of TOC */
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unsigned char o_snloader[2]; /* section number of .loader section */
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unsigned char o_snbss[2]; /* section number of .bss section */
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unsigned char o_algntext[2]; /* .text alignment */
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unsigned char o_algndata[2]; /* .data alignment */
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unsigned char o_modtype[2]; /* module type (??) */
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unsigned char o_cputype[2]; /* cpu type */
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unsigned char o_maxstack[4]; /* max stack size (??) */
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unsigned char o_maxdata[4]; /* max data size (??) */
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unsigned char o_debugger[4]; /* reserved */
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unsigned char o_textpsize[1]; /* text page size */
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unsigned char o_datapsize[1]; /* data page size */
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unsigned char o_stackpsize[1]; /* stack page size */
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unsigned char o_flags[1]; /* Flags and TLS alignment */
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unsigned char o_sntdata[2]; /* section number of .tdata section */
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unsigned char o_sntbss[2]; /* section number of .tbss section */
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}
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AOUTHDR;
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#define AOUTSZ 72
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#define SMALL_AOUTSZ (28)
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#define AOUTHDRSZ 72
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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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#define SCNHDR struct external_scnhdr
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#define SCNHSZ 40
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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 6
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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_pad1[2];
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char x_lnno[4]; /* Source line number */
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char x_pad[12];
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} x_sym;
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struct {
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char x_exptr[4];
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char x_fsize[4];
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char x_lnnoptr[4];
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char x_endndx[4];
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char x_pad[1];
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} x_fcn;
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struct {
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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_n;
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char x_ftype[1];
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char x_resv[3];
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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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char x_pad[10];
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} x_scn;
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struct {
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char x_scnlen[4];
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char x_parmhash[4];
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char x_snhash[2];
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char x_smtyp[1];
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char x_smclas[1];
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char x_stab[4];
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char x_snstab[2];
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} x_csect;
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struct {
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char x_scnlen[4];
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char x_pad1[4];
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char x_nreloc[4];
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char x_pad2[6];
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} x_sect;
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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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/* The ldhdr structure. This appears at the start of the .loader
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section. */
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struct external_ldhdr
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{
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bfd_byte l_version[4];
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bfd_byte l_nsyms[4];
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bfd_byte l_nreloc[4];
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bfd_byte l_istlen[4];
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bfd_byte l_nimpid[4];
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bfd_byte l_impoff[4];
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bfd_byte l_stlen[4];
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bfd_byte l_stoff[4];
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};
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#define LDHDRSZ (8 * 4)
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struct external_ldsym
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{
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union
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{
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bfd_byte _l_name[E_SYMNMLEN];
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struct
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{
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bfd_byte _l_zeroes[4];
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bfd_byte _l_offset[4];
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} _l_l;
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} _l;
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bfd_byte l_value[4];
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bfd_byte l_scnum[2];
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bfd_byte l_smtype[1];
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bfd_byte l_smclas[1];
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bfd_byte l_ifile[4];
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bfd_byte l_parm[4];
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};
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#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
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struct external_ldrel
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{
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bfd_byte l_vaddr[4];
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bfd_byte l_symndx[4];
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bfd_byte l_rtype[2];
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bfd_byte l_rsecnm[2];
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};
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#define LDRELSZ (2 * 4 + 2 * 2)
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struct external_exceptab
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{
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union {
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bfd_byte e_symndx[4];
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bfd_byte e_paddr[4];
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} e_addr;
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bfd_byte e_lang[1];
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bfd_byte e_reason[1];
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};
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#define EXCEPTSZ (4 + 2)
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/******************** Core files *************************/
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struct external_core_dumpx
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{
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unsigned char c_signo[1];
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unsigned char c_flag[1];
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unsigned char c_entries[2];
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unsigned char c_version[4];
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unsigned char c_fdsinfox[8];
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unsigned char c_loader[8];
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unsigned char c_lsize[8];
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unsigned char c_n_thr[4];
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unsigned char c_reserved0[4];
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unsigned char c_thr[8];
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unsigned char c_segs[8];
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unsigned char c_segregion[8];
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unsigned char c_stack[8];
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unsigned char c_stackorg[8];
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unsigned char c_size[8];
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unsigned char c_data[8];
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unsigned char c_dataorg[8];
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unsigned char c_datasize[8];
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unsigned char c_sdorg[8];
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unsigned char c_sdsize[8];
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unsigned char c_vmmregions[8];
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unsigned char c_vmm[8];
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unsigned char c_impl[4];
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unsigned char c_pad[4];
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unsigned char c_cprs[8];
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unsigned char c_reserved[7 * 8];
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/* Followed by:
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- context of the faulting thread.
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- user structure. */
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};
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/* Core file verion. */
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#define CORE_DUMPX_VERSION 0x0feeddb1
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#define CORE_DUMPXX_VERSION 0x0feeddb2
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struct external_ld_info32
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{
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unsigned char ldinfo_next[4];
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unsigned char core_offset[4];
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unsigned char ldinfo_textorg[4];
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unsigned char ldinfo_textsize[4];
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unsigned char ldinfo_dataorg[4];
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unsigned char ldinfo_datasize[4];
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unsigned char ldinfo_filename[2];
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};
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