/* IBM RS/6000 "XCOFF" file definitions for BFD. Copyright (C) 1990, 1991 Free Software Foundation, Inc. FIXME: Can someone provide a transliteration of this name into ASCII? Using the following chars caused a compiler warning on HIUX (so I replaced them with octal escapes), and isn't useful without an understanding of what character set it is. Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM and John Gilmore of Cygnus Support. */ /********************** 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[4]; /* file pointer to symtab */ char f_nsyms[4]; /* number of symtab entries */ char f_opthdr[2]; /* sizeof(optional hdr) */ char f_flags[2]; /* flags */ }; /* IBM RS/6000 */ #define U802WRMAGIC 0730 /* writeable text segments **chh** */ #define U802ROMAGIC 0735 /* readonly sharable text segments */ #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ #define BADMAG(x) \ ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ (x).f_magic != U802TOCMAGIC) #define FILHDR struct external_filehdr #define FILHSZ 20 /********************** AOUT "OPTIONAL HEADER" **********************/ typedef struct { unsigned char magic[2]; /* type of file */ unsigned char vstamp[2]; /* version stamp */ unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ unsigned char dsize[4]; /* initialized data " " */ unsigned char bsize[4]; /* uninitialized data " " */ unsigned char entry[4]; /* entry pt. */ unsigned char text_start[4]; /* base of text used for this file */ unsigned char data_start[4]; /* base of data used for this file */ unsigned char o_toc[4]; /* 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_maxstack[4]; /* max stack size (??) */ unsigned char o_maxdata[4]; /* max data size (??) */ unsigned char o_resv2[12]; /* reserved */ } AOUTHDR; #define AOUTSZ 72 #define SMALL_AOUTSZ (28) #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[4]; /* physical address, aliased s_nlib */ char s_vaddr[4]; /* virtual address */ char s_size[4]; /* section size */ char s_scnptr[4]; /* file ptr to raw data for section */ char s_relptr[4]; /* file ptr to relocation */ char s_lnnoptr[4]; /* file ptr to line numbers */ char s_nreloc[2]; /* number of relocation entries */ char s_nlnno[2]; /* number of line number entries*/ char s_flags[4]; /* flags */ }; /* * 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 40 /* 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[4]; /* function name symbol index, iff l_lnno == 0*/ char l_paddr[4]; /* (physical) address of line number */ } l_addr; char l_lnno[2]; /* line number */ }; #define LINENO struct external_lineno #define LINESZ 6 /********************** 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_name[E_SYMNMLEN]; struct { char e_zeroes[4]; char e_offset[4]; } e; } e; char e_value[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 { char x_tagndx[4]; /* str, un, or enum tag indx */ union { struct { char x_lnno[2]; /* declaration line number */ char x_size[2]; /* str/union/array size */ } x_lnsz; char x_fsize[4]; /* size of function */ } x_misc; union { struct { /* if ISFCN, tag, or .bb */ char x_lnnoptr[4]; /* ptr to fcn line # */ char x_endndx[4]; /* entry ndx past block end */ } x_fcn; struct { /* if ISARY, up to 4 dimen. */ char x_dimen[E_DIMNUM][2]; } x_ary; } x_fcnary; char x_tvndx[2]; /* tv index */ } x_sym; union { char x_fname[E_FILNMLEN]; struct { char x_zeroes[4]; char x_offset[4]; } x_n; } x_file; struct { char x_scnlen[4]; /* section length */ char x_nreloc[2]; /* # relocation entries */ char x_nlinno[2]; /* # line numbers */ } x_scn; struct { char x_tvfill[4]; /* tv fill value */ char x_tvlen[2]; /* length of .tv */ char x_tvran[2][2]; /* tv range */ } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ struct { unsigned char x_scnlen[4]; unsigned char x_parmhash[4]; unsigned char x_snhash[2]; unsigned char x_smtyp[1]; unsigned char x_smclas[1]; unsigned char x_stab[4]; unsigned char x_snstab[2]; } x_csect; }; #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) /********************** RELOCATION DIRECTIVES **********************/ struct external_reloc { char r_vaddr[4]; char r_symndx[4]; char r_size[1]; char r_type[1]; }; #define RELOC struct external_reloc #define RELSZ 10 #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