| /* IBM RS/6000 "XCOFF64" file definitions for BFD. |
| Copyright (C) 2000 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /********************** FILE HEADER **********************/ |
| |
| struct external_filehdr { |
| char f_magic[2]; /* magic number */ |
| char f_nscns[2]; /* number of sections */ |
| char f_timdat[4]; /* time & date stamp */ |
| char f_symptr[8];/* file pointer to symtab */ |
| char f_opthdr[2]; /* sizeof(optional hdr) */ |
| char f_flags[2]; /* flags */ |
| char f_nsyms[4]; /* number of symtab entries */ |
| }; |
| |
| /* IBM RS/6000 */ |
| #define U803XTOCMAGIC 0757 /* readonly text segments and TOC, XCOFF64 */ |
| |
| #define BADMAG(x) ((x).f_magic != U803XTOCMAGIC) |
| |
| #define FILHDR struct external_filehdr |
| #define FILHSZ 24 |
| |
| /********************** AOUT "OPTIONAL HEADER" **********************/ |
| |
| |
| typedef struct |
| { |
| unsigned char magic[2]; /* type of file */ |
| unsigned char vstamp[2]; /* version stamp */ |
| unsigned char o_debugger[4]; /* reserved */ |
| unsigned char text_start[8]; /* base of text used for this file */ |
| unsigned char data_start[8]; /* base of data used for this file */ |
| unsigned char o_toc[8]; /* address of TOC */ |
| unsigned char o_snentry[2]; /* section number of entry point */ |
| unsigned char o_sntext[2]; /* section number of .text section */ |
| unsigned char o_sndata[2]; /* section number of .data section */ |
| unsigned char o_sntoc[2]; /* section number of TOC */ |
| unsigned char o_snloader[2]; /* section number of .loader section */ |
| unsigned char o_snbss[2]; /* section number of .bss section */ |
| unsigned char o_algntext[2]; /* .text alignment */ |
| unsigned char o_algndata[2]; /* .data alignment */ |
| unsigned char o_modtype[2]; /* module type (??) */ |
| unsigned char o_cputype[2]; /* cpu type */ |
| unsigned char o_resv2[4]; /* reserved */ |
| unsigned char tsize[8]; /* text size bytes, padded to FW bdry */ |
| unsigned char dsize[8]; /* initialized data " " */ |
| unsigned char bsize[8]; /* uninitialized data " " */ |
| unsigned char entry[8]; /* entry pt. */ |
| unsigned char o_maxstack[8]; /* max stack size (??) */ |
| unsigned char o_maxdata[8]; /* max data size (??) */ |
| unsigned char o_resv3[16]; /* reserved */ |
| } |
| AOUTHDR; |
| |
| #define AOUTSZ 120 |
| #define SMALL_AOUTSZ (0) |
| #define AOUTHDRSZ 72 |
| |
| #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ |
| #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ |
| #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ |
| |
| |
| /********************** SECTION HEADER **********************/ |
| |
| |
| struct external_scnhdr { |
| char s_name[8]; /* section name */ |
| char s_paddr[8]; /* physical address, aliased s_nlib */ |
| char s_vaddr[8]; /* virtual address */ |
| char s_size[8]; /* section size */ |
| char s_scnptr[8]; /* file ptr to raw data for section */ |
| char s_relptr[8]; /* file ptr to relocation */ |
| char s_lnnoptr[8]; /* file ptr to line numbers */ |
| char s_nreloc[4]; /* number of relocation entries */ |
| char s_nlnno[4]; /* number of line number entries*/ |
| char s_flags[4]; /* flags */ |
| char s_pad[4]; /* padding */ |
| }; |
| |
| /* |
| * names of "special" sections |
| */ |
| #define _TEXT ".text" |
| #define _DATA ".data" |
| #define _BSS ".bss" |
| #define _PAD ".pad" |
| #define _LOADER ".loader" |
| |
| #define SCNHDR struct external_scnhdr |
| |
| #define SCNHSZ 72 |
| |
| /* XCOFF uses a special .loader section with type STYP_LOADER. */ |
| #define STYP_LOADER 0x1000 |
| |
| /* XCOFF uses a special .debug section with type STYP_DEBUG. */ |
| #define STYP_DEBUG 0x2000 |
| |
| /* XCOFF handles line number or relocation overflow by creating |
| another section header with STYP_OVRFLO set. */ |
| #define STYP_OVRFLO 0x8000 |
| |
| /********************** LINE NUMBERS **********************/ |
| |
| /* 1 line number entry for every "breakpointable" source line in a section. |
| * Line numbers are grouped on a per function basis; first entry in a function |
| * grouping will have l_lnno = 0 and in place of physical address will be the |
| * symbol table index of the function name. |
| */ |
| struct external_lineno { |
| union { |
| char l_symndx[8];/* function name symbol index, iff l_lnno == 0*/ |
| char l_paddr[8]; /* (physical) address of line number */ |
| } l_addr; |
| char l_lnno[4]; /* line number */ |
| }; |
| |
| |
| #define LINENO struct external_lineno |
| |
| #define LINESZ 12 |
| |
| |
| /********************** SYMBOLS **********************/ |
| |
| #define E_SYMNMLEN 8 /* # characters in a symbol name */ |
| #define E_FILNMLEN 14 /* # characters in a file name */ |
| #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ |
| |
| struct external_syment |
| { |
| union { |
| char e_value[8]; |
| } e; |
| char e_offset[4]; |
| char e_scnum[2]; |
| char e_type[2]; |
| char e_sclass[1]; |
| char e_numaux[1]; |
| }; |
| |
| |
| |
| #define N_BTMASK (017) |
| #define N_TMASK (060) |
| #define N_BTSHFT (4) |
| #define N_TSHIFT (2) |
| |
| |
| union external_auxent { |
| |
| struct { |
| union { |
| struct { |
| char x_lnno[4]; /* declaration line number */ |
| char x_size[2]; /* str/union/array size */ |
| } x_lnsz; |
| struct { |
| char x_lnnoptr[8];/* ptr to fcn line */ |
| char x_fsize[4]; /* size of function */ |
| char x_endndx[4]; /* entry ndx past block end */ |
| } x_fcn; |
| } x_fcnary; |
| } x_sym; |
| |
| union { |
| char x_fname[E_FILNMLEN]; |
| struct { |
| char x_zeroes[4]; |
| char x_offset[4]; |
| char x_pad[6]; |
| unsigned char x_ftype[1]; |
| unsigned char x_resv[2]; |
| } x_n; |
| } x_file; |
| |
| struct { |
| char x_exptr[8]; |
| char x_fsize[4]; |
| char x_endndx[4]; |
| char x_pad[1]; |
| } x_except; |
| |
| struct { |
| unsigned char x_scnlen_lo[4]; |
| unsigned char x_parmhash[4]; |
| unsigned char x_snhash[2]; |
| unsigned char x_smtyp[1]; |
| unsigned char x_smclas[1]; |
| unsigned char x_scnlen_hi[4]; |
| unsigned char x_pad[1]; |
| } x_csect; |
| |
| struct { |
| char x_pad[17]; |
| char x_auxtype[1]; |
| } x_auxtype; |
| }; |
| |
| #define SYMENT struct external_syment |
| #define SYMESZ 18 |
| #define AUXENT union external_auxent |
| #define AUXESZ 18 |
| #define DBXMASK 0x80 /* for dbx storage mask */ |
| #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) |
| |
| /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */ |
| #define _AUX_EXCEPT 255 |
| #define _AUX_FCN 254 |
| #define _AUX_SYM 253 |
| #define _AUX_FILE 252 |
| #define _AUX_CSECT 251 |
| |
| |
| |
| /********************** RELOCATION DIRECTIVES **********************/ |
| |
| |
| struct external_reloc { |
| char r_vaddr[8]; |
| char r_symndx[4]; |
| char r_size[1]; |
| char r_type[1]; |
| }; |
| |
| |
| #define RELOC struct external_reloc |
| #define RELSZ 14 |
| |
| #define DEFAULT_DATA_SECTION_ALIGNMENT 4 |
| #define DEFAULT_BSS_SECTION_ALIGNMENT 4 |
| #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 |
| /* For new sections we havn't heard of before */ |
| #define DEFAULT_SECTION_ALIGNMENT 4 |