/* Support for Intel 960 COFF and Motorola 88k BCS COFF (and maybe others) */ /* Copyright (C) 1990, 1991 Free Software Foundation, Inc. This file is part of BFD, the Binary File Diddler. BFD 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 1, or (at your option) any later version. BFD 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 BFD; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /*doc* @section coff backends BFD supports a number of different flavours of coff format. The major difference between formats are the sizes and alignments of fields in structures on disk, and the occasional extra field. Coff in all its varieties is implimented with a few common files and a number of implementation specific files. For example, The 88k bcs coff format is implemented in the file @code{m88k-bcs.c}. This file @code{#include}s @code{m88k-bcs.h} which defines the external structure of the coff format for the 88k, and @code{internalcoff.h} which defines the internal structure. @code{m88k-bcs.c} also defines the relocations used by the 88k format @xref{Relocations}. Then the major portion of coff code is included (@code{coffcode.h}) which defines the methods used to act upon the types defined in @code{m88k-bcs.h} and @code{internalcoff.h}. The Intel i960 processor version of coff is implemented in @code{icoff.c}. This file has the same structure as @code{m88k-bcs.c}, except that it includes @code{intel-coff.h} rather than @code{m88k-bcs.h}. @subsection Porting To A New Version of Coff The recommended method is to select from the existing implimentations the version of coff which is most like the one you want to use, for our purposes, we'll say that i386 coff is the one you select, and that your coff flavour is called foo. Copy the @code{i386coff.c} to @code{foocoff.c}, copy @code{../include/i386coff.h} to @code{../include/foocoff.h} and add the lines to @code{targets.c} and @code{Makefile.in} so that your new back end is used. Alter the shapes of the structures in @code{../include/foocoff.h} so that they match what you need. You will probably also have to add @code{#ifdef}s to the code in @code{internalcoff.h} and @code{coffcode.h} if your version of coff is too wild. You can verify that your new bfd backend works quite simply by building @code{objdump} from the @code{binutils} directory, and making sure that its version of what's going on at your host systems idea (assuming it has the pretty standard coff dump utility (usually called @code{att-dump} or just @code{dump})) are the same. Then clean up your code, and send what you've done to Cygnus. Then your stuff will be in the next release, and you won't have to keep integrating it. @subsection How The Coff Backend Works @subsubsection Bit Twiddling Each flavour of coff supported in bfd has its own header file descibing the external layout of the structures. There is also an internal description of the coff layout (in @code{internalcoff.h}) file (@code{}). A major function of the coff backend is swapping the bytes and twiddling the bits to translate the external form of the structures into the normal internal form. This is all performed in the @code{bfd_swap}_@i{thing}_@i{direction} routines. Some elements are different sizes between different versions of coff, it is the duty of the coff version specific include file to override the definitions of various packing routines in @code{coffcode.h}. Eg the size of line number entry in coff is sometimes 16 bits, and sometimes 32 bits. @code{#define}ing @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the correct one. No doubt, some day someone will find a version of coff which has a varying field size not catered for at the moment. To port bfd, that person will have to add more @code{#defines}. Three of the bit twiddling routines are exported to @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in} and @code{coff_swap_linno_in}. @code{GDB} reads the symbol table on its own, but uses bfd to fix things up. @subsubsection Symbol Reading The simple canonical form for symbols used by bfd is not rich enough to keep all the information available in a coff symbol table. The back end gets around this by keeping the original symbol table around, "behind the sceens". When a symbol table is requested (through a call to @code{bfd_canonicalize_symtab}, a request gets through to @code{get_normalized_symtab}. This reads the symbol table from the coff file and swaps all the structures inside into the internal form. It also fixes up all the pointers in the table (represented in the file by offsets from the first symbol in the table) into physical pointers to elements in the new internal table. This involves some work since the meanings of fields changes depending upon context; a field that is a pointer to another structure in the symbol table at one moment may be the size in bytes of a structure in the next. Another pass is made over the table. All symbols which mark file names (@code{C_FILE} symbols) are modified so that the internal string points to the value in the auxent (the real filename) rather than the normal text associated with the symbol (@code{".file"}). At this time the symbol names are moved around. Coff stores all symbols less than nine characters long physically within the symbol table, longer strings are kept at the end of the file in the string table. This pass moves all strings into memory, and replaces them with pointers to the strings. The symbol table is massaged once again, this time to create the canonical table used by the bfd application. Each symbol is inspected in turn, and a decision made (using the @code{sclass} field) about the various flags to set in the @code{asymbol} @xref{Symbols}. The generated canonical table shares strings with the hidden internal symbol table. Any linenumbers are read from the coff file too, and attatched to the symbols which own the functions the linenumbers belong to. @subsubsection Symbol Writing Writing a symbol to a coff file which didn't come from a coff file will lose any debugging information. The @code{asymbol} structure remembers the bfd from which was born, and on output the back end makes sure that the same destination target as source target is present. When the symbols have come from a coff file then all the debugging information is preserved. Symbol tables are provided for writing to the back end in a vector of pointers to pointers. This allows applications like the linker to accumulate and output large symbol tables without having to do too much byte copying. The symbol table is not output to a writable bfd until it is closed. The order of operations on the canonical symbol table at that point are: @table @code @item coff_renumber_symbols This function runs through the provided symbol table and patches each symbol marked as a file place holder (@code{C_FILE}) to point to the next file place holder in the list. It also marks each @code{offset} field in the list with the offset from the first symbol of the current symbol. Another function of this procedure is to turn the canonical value form of bfd into the form used by coff. Internally, bfd expects symbol values to be offsets from a section base; so a symbol physically at 0x120, but in a section starting at 0x100, would have the value 0x20. Coff expects symbols to contain their final value, so symbols have their values changed at this point to reflect their sum with their owning section. Note that this transformation uses the @code{output_section} field of the @code{asymbol}'s @code{asection} @xref{Sections}. @item coff_mangle_symbols This routine runs though the provided symbol table and uses the offsets generated by the previous pass and the pointers generated when the symbol table was read in to create the structured hierachy required by coff. It changes each pointer to a symbol to an index into the symbol table of the symbol being referenced. @item coff_write_symbols This routine runs through the symbol table and patches up the symbols from their internal form into the coff way, calls the bit twiddlers and writes out the tabel to the file. @end table */ /*proto* The hidden information for an asymbol is: *+++ $ typedef struct coff_ptr_struct $ { Remembers the offset from the first symbol in the file for this symbol. Generated by @code{coff_renumber_symbols}. $ unsigned int offset; Should the tag field of this symbol be renumbered. Created by @code{coff_pointerize_aux}. $ char fix_tag; Should the endidx field of this symbol be renumbered. Created by @code{coff_pointerize_aux}. $ char fix_end; The container for the symbol structure as read and translated from the file. $ union { $ union internal_auxent auxent; $ struct internal_syment syment; $ } u; $ } combined_entry_type; $ *--- Each canonical asymbol really looks like this: *+++ $ typedef struct coff_symbol_struct $ { The actual symbol which the rest of bfd works with $ asymbol symbol; A pointer to the hidden information for this symbol $ combined_entry_type *native; A pointer to the linenumber information for this symbol $ struct lineno_cache_entry *lineno; $ } coff_symbol_type; *--- */ /* $Id$ */ /* Most of this hacked by Steve Chamberlain, steve@cygnus.com */ #include "archures.h" /* Machine architectures and types */ /* Align an address upward to a boundary, expressed as a number of bytes. E.g. align to an 8-byte boundary with argument of 8. */ #define ALIGN(this, boundary) \ ((( (this) + ((boundary) -1)) & (~((boundary)-1)))) /* Align an address upward to a power of two. Argument is the power of two, e.g. 8-byte alignment uses argument of 3 (8 == 2^3). */ #define i960_align(addr, align) \ ( ((addr) + ((1<<(align))-1)) & (-1 << (align))) #define PUTWORD bfd_h_put_32 #define PUTHALF bfd_h_put_16 #ifndef GET_FCN_LNNOPTR #define GET_FCN_LNNOPTR(abfd, ext) bfd_h_get_32(abfd, ext->x_sym.x_fcnary.x_fcn.x_lnnoptr) #endif #ifndef GET_FCN_ENDNDX #define GET_FCN_ENDNDX(abfd, ext) bfd_h_get_32(abfd, ext->x_sym.x_fcnary.x_fcn.x_endndx) #endif #ifndef PUT_FCN_LNNOPTR #define PUT_FCN_LNNOPTR(abfd, in, ext) PUTWORD(abfd, in, ext->x_sym.x_fcnary.x_fcn.x_lnnoptr) #endif #ifndef PUT_FCN_ENDNDX #define PUT_FCN_ENDNDX(abfd, in, ext) PUTWORD(abfd, in, ext->x_sym.x_fcnary.x_fcn.x_endndx) #endif #ifndef GET_LNSZ_LNNO #define GET_LNSZ_LNNO(abfd, ext) bfd_h_get_16(abfd, ext->x_sym.x_misc.x_lnsz.x_lnno) #endif #ifndef GET_LNSZ_SIZE #define GET_LNSZ_SIZE(abfd, ext) bfd_h_get_16(abfd, ext->x_sym.x_misc.x_lnsz.x_size) #endif #ifndef PUT_LNSZ_LNNO #define PUT_LNSZ_LNNO(abfd, in, ext) bfd_h_put_16(abfd, in, ext->x_sym.x_misc.x_lnsz.x_lnno) #endif #ifndef PUT_LNSZ_SIZE #define PUT_LNSZ_SIZE(abfd, in, ext) bfd_h_put_16(abfd, in, ext->x_sym.x_misc.x_lnsz.x_size) #endif #ifndef GET_SCN_SCNLEN #define GET_SCN_SCNLEN(abfd, ext) bfd_h_get_32(abfd, ext->x_scn.x_scnlen) #endif #ifndef GET_SCN_NRELOC #define GET_SCN_NRELOC(abfd, ext) bfd_h_get_16(abfd, ext->x_scn.x_nreloc) #endif #ifndef GET_SCN_NLINNO #define GET_SCN_NLINNO(abfd, ext) bfd_h_get_16(abfd, ext->x_scn.x_nlinno) #endif #ifndef PUT_SCN_SCNLEN #define PUT_SCN_SCNLEN(abfd,in, ext) bfd_h_put_32(abfd, in, ext->x_scn.x_scnlen) #endif #ifndef PUT_SCN_NRELOC #define PUT_SCN_NRELOC(abfd,in, ext) bfd_h_put_16(abfd, in,ext->x_scn.x_nreloc) #endif #ifndef PUT_SCN_NLINNO #define PUT_SCN_NLINNO(abfd,in, ext) bfd_h_put_16(abfd,in, ext->x_scn.x_nlinno) #endif /* void warning(); */ static int DEFUN(get_index,(symbol), asymbol *symbol) { return (int) symbol->value; } static void DEFUN(set_index,(symbol, idx), asymbol *symbol AND unsigned int idx) { symbol->value = idx; } /* ********************************************************************** Here are all the routines for swapping the structures seen in the outside world into the internal forms. */ static void DEFUN(bfd_swap_reloc_in,(abfd, reloc_src, reloc_dst), bfd *abfd AND RELOC *reloc_src AND struct internal_reloc *reloc_dst) { reloc_dst->r_vaddr = bfd_h_get_32(abfd, reloc_src->r_vaddr); reloc_dst->r_symndx = bfd_h_get_32(abfd, reloc_src->r_symndx); reloc_dst->r_type = bfd_h_get_16(abfd, reloc_src->r_type); #if M88 reloc_dst->r_offset = bfd_h_get_16(abfd, reloc_src->r_offset); #endif } static void DEFUN(bfd_swap_reloc_out,(abfd, reloc_src, reloc_dst), bfd *abfd AND struct internal_reloc *reloc_src AND struct external_reloc *reloc_dst) { bfd_h_put_32(abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); bfd_h_put_32(abfd, reloc_src->r_symndx, reloc_dst->r_symndx); bfd_h_put_16(abfd, reloc_src->r_type, reloc_dst->r_type); #if M88 bfd_h_put_16(abfd, reloc_src->r_offset, reloc_dst->r_offset); #endif } static void DEFUN(bfd_swap_filehdr_in,(abfd, filehdr_src, filehdr_dst), bfd *abfd AND FILHDR *filehdr_src AND struct internal_filehdr *filehdr_dst) { filehdr_dst->f_magic = bfd_h_get_16(abfd, filehdr_src->f_magic); filehdr_dst->f_nscns = bfd_h_get_16(abfd,filehdr_src-> f_nscns); filehdr_dst->f_timdat = bfd_h_get_32(abfd,filehdr_src-> f_timdat); filehdr_dst->f_symptr = bfd_h_get_32(abfd,filehdr_src-> f_symptr); filehdr_dst->f_nsyms = bfd_h_get_32(abfd,filehdr_src-> f_nsyms); filehdr_dst->f_opthdr = bfd_h_get_16(abfd,filehdr_src-> f_opthdr); filehdr_dst->f_flags = bfd_h_get_16(abfd,filehdr_src-> f_flags); } static void DEFUN(bfd_swap_filehdr_out,(abfd, filehdr_in, filehdr_out), bfd *abfd AND struct internal_filehdr *filehdr_in AND FILHDR *filehdr_out) { bfd_h_put_16(abfd, filehdr_in->f_magic, filehdr_out->f_magic); bfd_h_put_16(abfd, filehdr_in->f_nscns, filehdr_out->f_nscns); bfd_h_put_32(abfd, filehdr_in->f_timdat, filehdr_out->f_timdat); bfd_h_put_32(abfd, filehdr_in->f_symptr, filehdr_out->f_symptr); bfd_h_put_32(abfd, filehdr_in->f_nsyms, filehdr_out->f_nsyms); bfd_h_put_16(abfd, filehdr_in->f_opthdr, filehdr_out->f_opthdr); bfd_h_put_16(abfd, filehdr_in->f_flags, filehdr_out->f_flags); } static void DEFUN(coff_swap_sym_in,(abfd, ext1, in1), bfd *abfd AND PTR ext1 AND PTR in1) { SYMENT *ext = (SYMENT *)ext1; struct internal_syment *in = (struct internal_syment *)in1; if( ext->e.e_name[0] == 0) { in->_n._n_n._n_zeroes = 0; in->_n._n_n._n_offset = bfd_h_get_32(abfd, ext->e.e.e_offset); } else { memcpy(in->_n._n_name, ext->e.e_name, SYMNMLEN); } in->n_value = bfd_h_get_32(abfd, ext->e_value); in->n_scnum = bfd_h_get_16(abfd, ext->e_scnum); if (sizeof(ext->e_type) == 2){ in->n_type = bfd_h_get_16(abfd, ext->e_type); } else { in->n_type = bfd_h_get_32(abfd, ext->e_type); } in->n_sclass = bfd_h_get_8(abfd, ext->e_sclass); in->n_numaux = bfd_h_get_8(abfd, ext->e_numaux); } static void DEFUN(coff_swap_sym_out,(abfd,in, ext), bfd *abfd AND struct internal_syment *in AND SYMENT *ext) { if(in->_n._n_name[0] == 0) { bfd_h_put_32(abfd, 0, ext->e.e.e_zeroes); bfd_h_put_32(abfd, in->_n._n_n._n_offset, ext->e.e.e_offset); } else { memcpy(ext->e.e_name, in->_n._n_name, SYMNMLEN); } bfd_h_put_32(abfd, in->n_value , ext->e_value); bfd_h_put_16(abfd, in->n_scnum , ext->e_scnum); if (sizeof(ext->e_type) == 2) { bfd_h_put_16(abfd, in->n_type , ext->e_type); } else { bfd_h_put_32(abfd, in->n_type , ext->e_type); } bfd_h_put_8(abfd, in->n_sclass , ext->e_sclass); bfd_h_put_8(abfd, in->n_numaux , ext->e_numaux); } static void DEFUN(coff_swap_aux_in,(abfd, ext1, type, class, in1), bfd *abfd AND PTR ext1 AND int type AND int class AND PTR in1) { AUXENT *ext = (AUXENT *)ext1; union internal_auxent *in = (union internal_auxent *)in1; switch (class) { case C_FILE: if (ext->x_file.x_fname[0] == 0) { in->x_file.x_n.x_zeroes = 0; in->x_file.x_n.x_offset = bfd_h_get_32(abfd, ext->x_file.x_n.x_offset); } else { memcpy (in->x_file.x_fname, ext->x_file.x_fname, sizeof (in->x_file.x_fname)); } break; case C_STAT: #ifdef C_LEAFSTAT case C_LEAFSTAT: #endif case C_HIDDEN: if (type == T_NULL) { in->x_scn.x_scnlen = GET_SCN_SCNLEN(abfd, ext); in->x_scn.x_nreloc = GET_SCN_NRELOC(abfd, ext); in->x_scn.x_nlinno = GET_SCN_NLINNO(abfd, ext); break; } default: in->x_sym.x_tagndx.l = bfd_h_get_32(abfd, ext->x_sym.x_tagndx); #ifndef NO_TVNDX in->x_sym.x_tvndx = bfd_h_get_16(abfd, ext->x_sym.x_tvndx); #endif if (ISARY(type) || class == C_BLOCK) { in->x_sym.x_fcnary.x_ary.x_dimen[0] = bfd_h_get_16(abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[0]); in->x_sym.x_fcnary.x_ary.x_dimen[1] = bfd_h_get_16(abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[1]); in->x_sym.x_fcnary.x_ary.x_dimen[2] = bfd_h_get_16(abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[2]); in->x_sym.x_fcnary.x_ary.x_dimen[3] = bfd_h_get_16(abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[3]); } in->x_sym.x_fcnary.x_fcn.x_lnnoptr = GET_FCN_LNNOPTR(abfd, ext); in->x_sym.x_fcnary.x_fcn.x_endndx.l = GET_FCN_ENDNDX(abfd, ext); if (ISFCN(type)) { in->x_sym.x_misc.x_fsize = bfd_h_get_32(abfd, ext->x_sym.x_misc.x_fsize); } else { in->x_sym.x_misc.x_lnsz.x_lnno = GET_LNSZ_LNNO(abfd, ext); in->x_sym.x_misc.x_lnsz.x_size = GET_LNSZ_SIZE(abfd, ext); } } } static void DEFUN(coff_swap_aux_out,(abfd, in, type, class, ext), bfd *abfd AND union internal_auxent *in AND int type AND int class AND AUXENT *ext) { switch (class) { case C_FILE: if (in->x_file.x_fname[0] == 0) { PUTWORD(abfd, 0, ext->x_file.x_n.x_zeroes ); PUTWORD(abfd, in->x_file.x_n.x_offset, ext->x_file.x_n.x_offset); } else { memcpy ( ext->x_file.x_fname,in->x_file.x_fname, sizeof (in->x_file.x_fname)); } break; case C_STAT: #ifdef C_LEAFSTAT case C_LEAFSTAT: #endif case C_HIDDEN: if (type == T_NULL) { PUT_SCN_SCNLEN(abfd, in->x_scn.x_scnlen, ext); PUT_SCN_NRELOC(abfd, in->x_scn.x_nreloc, ext); PUT_SCN_NLINNO(abfd, in->x_scn.x_nlinno, ext); break; } default: PUTWORD(abfd, in->x_sym.x_tagndx.l, ext->x_sym.x_tagndx); #ifndef NO_TVNDX PUTWORD(abfd, in->x_sym.x_tvndx , ext->x_sym.x_tvndx); #endif if (ISFCN(type)) { PUTWORD(abfd, in->x_sym.x_misc.x_fsize, ext->x_sym.x_misc.x_fsize); PUT_FCN_LNNOPTR(abfd, in->x_sym.x_fcnary.x_fcn.x_lnnoptr, ext); PUT_FCN_ENDNDX(abfd, in->x_sym.x_fcnary.x_fcn.x_endndx.l, ext); } else { if (ISARY(type) || class == C_BLOCK) { bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[0],ext->x_sym.x_fcnary.x_ary.x_dimen[0]); bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[1],ext->x_sym.x_fcnary.x_ary.x_dimen[1]); bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[2],ext->x_sym.x_fcnary.x_ary.x_dimen[2]); bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[3],ext->x_sym.x_fcnary.x_ary.x_dimen[3]); } PUT_LNSZ_LNNO(abfd, in->x_sym.x_misc.x_lnsz.x_lnno, ext); PUT_LNSZ_SIZE(abfd, in->x_sym.x_misc.x_lnsz.x_size, ext); PUT_FCN_LNNOPTR(abfd, in->x_sym.x_fcnary.x_fcn.x_lnnoptr, ext); PUT_FCN_ENDNDX(abfd, in->x_sym.x_fcnary.x_fcn.x_endndx.l, ext); } } } static void DEFUN(coff_swap_lineno_in,(abfd, ext1, in1), bfd *abfd AND PTR ext1 AND PTR in1) { LINENO *ext = (LINENO *)ext1; struct internal_lineno *in = (struct internal_lineno *)in1; in->l_addr.l_symndx = bfd_h_get_32(abfd, ext->l_addr.l_symndx); #if defined(M88) in->l_lnno = bfd_h_get_32(abfd, ext->l_lnno); #else in->l_lnno = bfd_h_get_16(abfd, ext->l_lnno); #endif } static void DEFUN(coff_swap_lineno_out,(abfd, in, ext), bfd *abfd AND struct internal_lineno *in AND struct external_lineno *ext) { PUTWORD(abfd, in->l_addr.l_symndx, ext->l_addr.l_symndx); #if defined(M88) PUTWORD(abfd, in->l_lnno, ext->l_lnno); #else PUTHALF(abfd, in->l_lnno, ext->l_lnno); #endif } static void DEFUN(bfd_swap_aouthdr_in,(abfd, aouthdr_ext1, aouthdr_int1), bfd *abfd AND PTR aouthdr_ext1 AND PTR aouthdr_int1) { AOUTHDR *aouthdr_ext = (AOUTHDR *) aouthdr_ext1; struct internal_aouthdr *aouthdr_int = (struct internal_aouthdr *)aouthdr_int1; aouthdr_int->magic = bfd_h_get_16(abfd, aouthdr_ext->magic); aouthdr_int->vstamp = bfd_h_get_16(abfd, aouthdr_ext->vstamp); aouthdr_int->tsize = bfd_h_get_32(abfd, aouthdr_ext->tsize); aouthdr_int->dsize = bfd_h_get_32(abfd, aouthdr_ext->dsize); aouthdr_int->bsize = bfd_h_get_32(abfd, aouthdr_ext->bsize); aouthdr_int->entry = bfd_h_get_32(abfd, aouthdr_ext->entry); aouthdr_int->text_start = bfd_h_get_32(abfd, aouthdr_ext->text_start); aouthdr_int->data_start = bfd_h_get_32(abfd, aouthdr_ext->data_start); #ifdef I960 aouthdr_int->tagentries = bfd_h_get_32(abfd, aouthdr_ext->tagentries); #endif } static void DEFUN(bfd_swap_aouthdr_out,(abfd, aouthdr_in, aouthdr_out), bfd *abfd AND struct internal_aouthdr *aouthdr_in AND AOUTHDR *aouthdr_out) { bfd_h_put_16(abfd, aouthdr_in->magic, aouthdr_out->magic); bfd_h_put_16(abfd, aouthdr_in->vstamp, aouthdr_out->vstamp); bfd_h_put_32(abfd, aouthdr_in->tsize, aouthdr_out->tsize); bfd_h_put_32(abfd, aouthdr_in->dsize, aouthdr_out->dsize); bfd_h_put_32(abfd, aouthdr_in->bsize, aouthdr_out->bsize); bfd_h_put_32(abfd, aouthdr_in->entry, aouthdr_out->entry); bfd_h_put_32(abfd, aouthdr_in->text_start, aouthdr_out->text_start); bfd_h_put_32(abfd, aouthdr_in->data_start, aouthdr_out->data_start); #ifdef I960 bfd_h_put_32(abfd, aouthdr_in->tagentries, aouthdr_out->tagentries); #endif } static void DEFUN(coff_swap_scnhdr_in,(abfd, scnhdr_ext, scnhdr_int), bfd *abfd AND SCNHDR *scnhdr_ext AND struct internal_scnhdr *scnhdr_int) { memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof(scnhdr_int->s_name)); scnhdr_int->s_vaddr = bfd_h_get_32(abfd, scnhdr_ext->s_vaddr); scnhdr_int->s_paddr = bfd_h_get_32(abfd, scnhdr_ext->s_paddr); scnhdr_int->s_size = bfd_h_get_32(abfd, scnhdr_ext->s_size); scnhdr_int->s_scnptr = bfd_h_get_32(abfd, scnhdr_ext->s_scnptr); scnhdr_int->s_relptr = bfd_h_get_32(abfd, scnhdr_ext->s_relptr); scnhdr_int->s_lnnoptr = bfd_h_get_32(abfd, scnhdr_ext->s_lnnoptr); scnhdr_int->s_flags = bfd_h_get_32(abfd, scnhdr_ext->s_flags); #if defined(M88) scnhdr_int->s_nreloc = bfd_h_get_32(abfd, scnhdr_ext->s_nreloc); scnhdr_int->s_nlnno = bfd_h_get_32(abfd, scnhdr_ext->s_nlnno); #else scnhdr_int->s_nreloc = bfd_h_get_16(abfd, scnhdr_ext->s_nreloc); scnhdr_int->s_nlnno = bfd_h_get_16(abfd, scnhdr_ext->s_nlnno); #endif #ifdef I960 scnhdr_int->s_align = bfd_h_get_32(abfd, scnhdr_ext->s_align); #endif } static void DEFUN(swap_scnhdr_out,(abfd, scnhdr_int, scnhdr_ext), bfd *abfd AND struct internal_scnhdr *scnhdr_int AND SCNHDR *scnhdr_ext) { memcpy(scnhdr_ext->s_name, scnhdr_int->s_name, sizeof(scnhdr_int->s_name)); PUTWORD(abfd, scnhdr_int->s_vaddr, scnhdr_ext->s_vaddr); PUTWORD(abfd, scnhdr_int->s_paddr, scnhdr_ext->s_paddr); PUTWORD(abfd, scnhdr_int->s_size, scnhdr_ext->s_size); PUTWORD(abfd, scnhdr_int->s_scnptr, scnhdr_ext->s_scnptr); PUTWORD(abfd, scnhdr_int->s_relptr, scnhdr_ext->s_relptr); PUTWORD(abfd, scnhdr_int->s_lnnoptr, scnhdr_ext->s_lnnoptr); PUTWORD(abfd, scnhdr_int->s_nreloc, scnhdr_ext->s_nreloc); #if defined(M88) PUTWORD(abfd, scnhdr_int->s_nlnno, scnhdr_ext->s_nlnno); PUTWORD(abfd, scnhdr_int->s_flags, scnhdr_ext->s_flags); #else PUTHALF(abfd, scnhdr_int->s_nlnno, scnhdr_ext->s_nlnno); PUTHALF(abfd, scnhdr_int->s_flags, scnhdr_ext->s_flags); #endif #if defined(I960) PUTWORD(abfd, scnhdr_int->s_align, scnhdr_ext->s_align); #endif } /* **********************************************************************/ /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be \0-terminated, but will not exceed 'maxlen' characters. The copy *will* be \0-terminated. */ static char * DEFUN(copy_name,(abfd, name, maxlen), bfd *abfd AND char *name AND int maxlen) { int len; char *newname; for (len = 0; len < maxlen; ++len) { if (name[len] == '\0') { break; } } if ((newname = (PTR) bfd_alloc(abfd, len+1)) == NULL) { bfd_error = no_memory; return (NULL); } strncpy(newname, name, len); newname[len] = '\0'; return newname; } /* initialize a section structure with information peculiar to this particular implementation of coff */ static boolean DEFUN(coff_new_section_hook,(abfd_ignore, section_ignore), bfd *abfd_ignore AND asection *section_ignore) { section_ignore->alignment_power = abfd_ignore->xvec->align_power_min; return true; } /* Take a section header read from a coff file (in HOST byte order), and make a BFD "section" out of it. */ static boolean DEFUN(make_a_section_from_file,(abfd, hdr), bfd *abfd AND struct internal_scnhdr *hdr) { asection *return_section; { /* Assorted wastage to null-terminate the name, thanks AT&T! */ char *name = bfd_alloc(abfd, sizeof (hdr->s_name)+1); if (name == NULL) { bfd_error = no_memory; return false; } strncpy(name, (char *) &hdr->s_name[0], sizeof (hdr->s_name)); name[sizeof (hdr->s_name)] = 0; return_section = bfd_make_section(abfd, name); } /* s_paddr is presumed to be = to s_vaddr */ #define assign(to, from) return_section->to = hdr->from assign(vma, s_vaddr); /* assign (vma, s_vaddr); */ assign(size, s_size); assign(filepos, s_scnptr); assign(rel_filepos, s_relptr); assign(reloc_count, s_nreloc); #ifdef I960 { /* FIXME, use a temp var rather than alignment_power */ assign(alignment_power, s_align); { unsigned int i; for (i = 0; i < 32; i++) { if ((1 << i) >= (int) (return_section->alignment_power)) { return_section->alignment_power = i; break; } } } } #endif assign(line_filepos, s_lnnoptr); /* return_section->linesize = hdr->s_nlnno * sizeof (struct lineno); */ #undef assign return_section->lineno_count = hdr->s_nlnno; return_section->userdata = NULL; return_section->next = (asection *) NULL; return_section->flags = 0; if ((hdr->s_flags & STYP_TEXT) || (hdr->s_flags & STYP_DATA)) return_section->flags = (SEC_LOAD | SEC_ALLOC); else if (hdr->s_flags & STYP_BSS) return_section->flags = SEC_ALLOC; if (hdr->s_nreloc != 0) return_section->flags |= SEC_RELOC; if (hdr->s_scnptr != 0) return_section->flags |= SEC_HAS_CONTENTS; return true; } static boolean DEFUN(coff_mkobject,(abfd), bfd *abfd) { set_tdata (abfd, bfd_zalloc (abfd,sizeof(coff_data_type))); if (coff_data(abfd) == 0) { bfd_error = no_memory; return false; } coff_data(abfd)->relocbase = 0; return true; } static bfd_target * DEFUN(coff_real_object_p,(abfd, nscns, internal_f, internal_a), bfd *abfd AND unsigned nscns AND struct internal_filehdr *internal_f AND struct internal_aouthdr *internal_a) { coff_data_type *coff; size_t readsize; /* length of file_info */ SCNHDR *external_sections; /* Build a play area */ if (coff_mkobject(abfd) != true) return 0; coff = coff_data(abfd); external_sections = (SCNHDR *)bfd_alloc(abfd, readsize = (nscns * SCNHSZ)); if (bfd_read((PTR)external_sections, 1, readsize, abfd) != readsize) { goto fail; } /* Now copy data as required; construct all asections etc */ coff->symbol_index_slew = 0; coff->relocbase =0; coff->raw_syment_count = 0; coff->raw_linenos = 0; coff->raw_syments = 0; coff->sym_filepos =0; coff->flags = internal_f->f_flags; if (nscns != 0) { unsigned int i; for (i = 0; i < nscns; i++) { struct internal_scnhdr tmp; coff_swap_scnhdr_in(abfd, external_sections + i, &tmp); make_a_section_from_file(abfd,&tmp); } } /* Determine the machine architecture and type. */ abfd->obj_machine = 0; switch (internal_f->f_magic) { #ifdef I386MAGIC case I386MAGIC: abfd->obj_arch = bfd_arch_i386; abfd->obj_machine = 0; break; #endif #ifdef MIPS case MIPS_MAGIC_1: case MIPS_MAGIC_2: case MIPS_MAGIC_3: abfd->obj_arch = bfd_arch_mips; abfd->obj_machine = 0; break; #endif #ifdef MC68MAGIC case MC68MAGIC: case M68MAGIC: abfd->obj_arch = bfd_arch_m68k; abfd->obj_machine = 68020; break; #endif #ifdef MC88MAGIC case MC88MAGIC: case MC88DMAGIC: case MC88OMAGIC: abfd->obj_arch = bfd_arch_m88k; abfd->obj_machine = 88100; break; #endif #ifdef I960 #ifdef I960ROMAGIC case I960ROMAGIC: case I960RWMAGIC: abfd->obj_arch = bfd_arch_i960; switch (F_I960TYPE & internal_f->f_flags) { default: case F_I960CORE: abfd->obj_machine = bfd_mach_i960_core; break; case F_I960KB: abfd->obj_machine = bfd_mach_i960_kb_sb; break; case F_I960MC: abfd->obj_machine = bfd_mach_i960_mc; break; case F_I960XA: abfd->obj_machine = bfd_mach_i960_xa; break; case F_I960CA: abfd->obj_machine = bfd_mach_i960_ca; break; case F_I960KA: abfd->obj_machine = bfd_mach_i960_ka_sa; break; } break; #endif #endif default: /* Unreadable input file type */ abfd->obj_arch = bfd_arch_obscure; break; } if (!(internal_f->f_flags & F_RELFLG)) abfd->flags |= HAS_RELOC; if ((internal_f->f_flags & F_EXEC)) abfd->flags |= EXEC_P; if (!(internal_f->f_flags & F_LNNO)) abfd->flags |= HAS_LINENO; if (!(internal_f->f_flags & F_LSYMS)) abfd->flags |= HAS_LOCALS; bfd_get_symcount(abfd) = internal_f->f_nsyms; if (internal_f->f_nsyms) abfd->flags |= HAS_SYMS; coff->sym_filepos = internal_f->f_symptr; coff->symbols = (coff_symbol_type *) NULL; bfd_get_start_address(abfd) = internal_f->f_opthdr ? internal_a->entry : 0; return abfd->xvec; fail: bfd_release(abfd, coff); return (bfd_target *)NULL; } static bfd_target * DEFUN(coff_object_p,(abfd), bfd *abfd) { int nscns; FILHDR filehdr; AOUTHDR opthdr; struct internal_filehdr internal_f; struct internal_aouthdr internal_a; bfd_error = system_call_error; /* figure out how much to read */ if (bfd_read((PTR) &filehdr, 1, FILHSZ, abfd) != FILHSZ) return 0; bfd_swap_filehdr_in(abfd, &filehdr, &internal_f); if (BADMAG(internal_f)) { bfd_error = wrong_format; return 0; } nscns =internal_f.f_nscns; if (internal_f.f_opthdr) { if (bfd_read((PTR) &opthdr, 1,AOUTSZ, abfd) != AOUTSZ) { return 0; } bfd_swap_aouthdr_in(abfd, &opthdr, &internal_a); } /* Seek past the opt hdr stuff */ bfd_seek(abfd, internal_f.f_opthdr + FILHSZ, SEEK_SET); /* if the optional header is NULL or not the correct size then quit; the only difference I can see between m88k dgux headers (MC88DMAGIC) and Intel 960 readwrite headers (I960WRMAGIC) is that the optional header is of a different size. But the mips keeps extra stuff in it's opthdr, so dont check when doing that */ #ifndef MIPS if (internal_f.f_opthdr != 0 && AOUTSZ != internal_f.f_opthdr) return (bfd_target *)NULL; #endif return coff_real_object_p(abfd, nscns, &internal_f, &internal_a); } /* Takes a bfd and a symbol, returns a pointer to the coff specific area of the symbol if there is one. */ static coff_symbol_type * DEFUN(coff_symbol_from,(abfd, symbol), bfd *abfd AND asymbol *symbol) { if (symbol->the_bfd->xvec->flavour != bfd_target_coff_flavour_enum) return (coff_symbol_type *)NULL; if (symbol->the_bfd->tdata == (PTR)NULL) return (coff_symbol_type *)NULL; return (coff_symbol_type *) symbol; } static void DEFUN(coff_count_linenumbers,(abfd), bfd *abfd) { unsigned int limit = bfd_get_symcount(abfd); unsigned int i; asymbol **p; { asection *s = abfd->sections->output_section; while (s) { BFD_ASSERT(s->lineno_count == 0); s = s->next; } } for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) { asymbol *q_maybe = *p; if (q_maybe->the_bfd->xvec->flavour == bfd_target_coff_flavour_enum) { coff_symbol_type *q = coffsymbol(q_maybe); if (q->lineno) { /* This symbol has a linenumber, increment the owning section's linenumber count */ alent *l = q->lineno; q->symbol.section->output_section->lineno_count++; l++; while (l->line_number) { q->symbol.section->output_section->lineno_count++; l++; } } } } } static void DEFUN(fixup_symbol_value,(coff_symbol_ptr, syment), coff_symbol_type *coff_symbol_ptr AND struct internal_syment *syment) { /* Normalize the symbol flags */ if (coff_symbol_ptr->symbol.flags & BSF_FORT_COMM) { /* a common symbol is undefined with a value */ syment->n_scnum = N_UNDEF; syment->n_value = coff_symbol_ptr->symbol.value; } else if (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) { syment->n_value = coff_symbol_ptr->symbol.value; } else if (coff_symbol_ptr->symbol.flags & BSF_UNDEFINED) { syment->n_scnum = N_UNDEF; syment->n_value = 0; } else if (coff_symbol_ptr->symbol.flags & BSF_ABSOLUTE) { syment->n_scnum = N_ABS; syment->n_value = coff_symbol_ptr->symbol.value; } else { syment->n_scnum = coff_symbol_ptr->symbol.section->output_section->index+1; syment->n_value = coff_symbol_ptr->symbol.value + coff_symbol_ptr->symbol.section->output_offset + coff_symbol_ptr->symbol.section->output_section->vma; } } /* run through all the symbols in the symbol table and work out what their indexes into the symbol table will be when output Coff requires that each C_FILE symbol points to the next one in the chain, and that the last one points to the first external symbol. We do that here too. */ static void DEFUN(coff_renumber_symbols,(bfd_ptr), bfd *bfd_ptr) { unsigned int symbol_count = bfd_get_symcount(bfd_ptr); asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; unsigned int native_index = 0; struct internal_syment *last_file = (struct internal_syment *)NULL; unsigned int symbol_index; for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) { coff_symbol_type *coff_symbol_ptr = coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]); if (coff_symbol_ptr && coff_symbol_ptr->native) { combined_entry_type *s = coff_symbol_ptr->native; int i; if (s->u.syment.n_sclass == C_FILE) { if (last_file != (struct internal_syment *)NULL) { last_file->n_value = native_index; } last_file = &(s->u.syment); } else { /* Modify the symbol values according to their section and type */ fixup_symbol_value(coff_symbol_ptr, &(s->u.syment)); } for (i = 0; i < s->u.syment.n_numaux + 1; i++) { s[i].offset = native_index ++; } } else { native_index++; } } } /*doc* Run thorough the symbol table again, and fix it so that all pointers to entries are changed to the entries' index in the output symbol table. */ static void DEFUN(coff_mangle_symbols,(bfd_ptr), bfd *bfd_ptr) { unsigned int symbol_count = bfd_get_symcount(bfd_ptr); asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; unsigned int native_index = 0; unsigned int symbol_index; for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) { coff_symbol_type *coff_symbol_ptr = coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]); if (coff_symbol_ptr && coff_symbol_ptr->native ) { int i; combined_entry_type *s = coff_symbol_ptr->native; for (i = 0; i < s->u.syment.n_numaux ; i++) { combined_entry_type *a = s + i + 1; if (a->fix_tag) { a->u.auxent.x_sym.x_tagndx.l = a->u.auxent.x_sym.x_tagndx.p->offset; } if (a->fix_end) { a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l = a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset; } } } } } #if 0 unsigned int symbol_count = bfd_get_symcount(bfd_ptr); asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; struct internal_syment *last_tagndx = (struct internal_syment *)NULL; struct internal_syment *last_file = (struct internal_syment *)NULL; struct internal_syment *last_fcn = (struct internal_syment *)NULL; struct internal_syment *block_stack[50]; struct internal_syment **last_block = &block_stack[0]; boolean first_time = true; unsigned int symbol_index; unsigned int native_index = 0; for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) { coff_symbol_type *coff_symbol_ptr = coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]); if (coff_symbol_ptr == (coff_symbol_type *)NULL) { /* This symbol has no coff information in it, it will take up only one slot in the output symbol table */ native_index++; } else { struct internal_syment *syment = coff_symbol_ptr->native; if (syment == (struct internal_syment *)NULL) { native_index++; } else { /* Normalize the symbol flags */ if (coff_symbol_ptr->symbol.flags & BSF_FORT_COMM) { /* a common symbol is undefined with a value */ syment->n_scnum = N_UNDEF; syment->n_value = coff_symbol_ptr->symbol.value; } else if (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) { syment->n_value = coff_symbol_ptr->symbol.value; } else if (coff_symbol_ptr->symbol.flags & BSF_UNDEFINED) { syment->n_scnum = N_UNDEF; syment->n_value = 0; } else if (coff_symbol_ptr->symbol.flags & BSF_ABSOLUTE) { syment->n_scnum = N_ABS; syment->n_value = coff_symbol_ptr->symbol.value; } else { syment->n_scnum = coff_symbol_ptr->symbol.section->output_section->index+1; syment->n_value = coff_symbol_ptr->symbol.value + coff_symbol_ptr->symbol.section->output_offset + coff_symbol_ptr->symbol.section->output_section->vma; } /* If this symbol ties up something then do it */ if (syment->n_sclass == C_FILE && last_file != (struct internal_syment *)NULL) { last_file->n_value = native_index; } else if ((syment->n_sclass == C_EXT || syment->n_sclass == C_STAT #ifdef C_LEAFEXT || syment->n_sclass == C_LEAFEXT || syment->n_sclass == C_LEAFSTAT #endif ) && last_fcn != (struct internal_syment *)NULL) { union internal_auxent *auxent = (union internal_auxent *)(last_fcn+1); auxent->x_sym.x_fcnary.x_fcn.x_endndx.l = native_index; last_fcn = (struct internal_syment *)NULL; } else if (syment->n_sclass == C_EOS && last_tagndx != (struct internal_syment*)NULL) { union internal_auxent *auxent = (union internal_auxent *)(last_tagndx+1); /* Remember that we keep the native index in the offset so patch the beginning of the struct to point to this */ /*if (last_ auxent->x_sym.x_tagndx = last_tagndx->_n._n_n._n_offset;*/ auxent->x_sym.x_fcnary.x_fcn.x_endndx.l = syment->n_numaux + 1 + native_index; /* Now point the eos to the structure */ auxent = (union internal_auxent *)(syment+1); auxent->x_sym.x_tagndx.l = last_tagndx->_n._n_n._n_offset; } else if (syment->n_sclass == C_BLOCK && coff_symbol_ptr->symbol.name[1] == 'e') { union internal_auxent *auxent = (union internal_auxent *)((*(--last_block))+1); auxent->x_sym.x_fcnary.x_fcn.x_endndx.l = native_index + syment->n_numaux + 1; } if (syment->n_sclass == C_EXT && !ISFCN(syment->n_type) && first_time == true && last_file != (struct internal_syment *)NULL) { /* This is the first external symbol seen which isn't a function place it in the last .file entry */ last_file->n_value = native_index; first_time = false; } #ifdef C_LEAFPROC if (syment->n_sclass == C_LEAFPROC && syment->n_numaux == 2) { union internal_auxent *auxent = (union internal_auxent *)(syment+2); /* This is the definition of a leaf proc, we'll relocate the address */ auxent->x_bal.x_balntry = coff_symbol_ptr->symbol.section->output_offset + coff_symbol_ptr->symbol.section->output_section->vma + auxent->x_bal.x_balntry ; } #endif /* If this symbol needs to be tied up then remember some facts */ if (syment->n_sclass == C_FILE) { last_file = syment; } if (syment->n_numaux != 0) { /* If this symbol would like to point to something in the future then remember where it is */ if (uses_x_sym_x_tagndx_p(bfd_ptr, syment)) { /* If this is a ref to a structure then we'll tie it up now - there are never any forward refs for one */ if (syment->n_sclass == C_STRTAG || syment->n_sclass == C_ENTAG || syment->n_sclass == C_UNTAG) { last_tagndx = syment; } else { /* This is a ref to a structure - the structure must have been defined within the same file, and previous to this point, so we can deduce the new tagndx directly. */ union internal_auxent *auxent = (union internal_auxent *)(syment+1); bfd *bfd_ptr = coff_symbol_ptr->symbol.the_bfd; struct internal_syment *base = obj_raw_syments(bfd_ptr); /* auxent->x_sym.x_tagndx = base[auxent->x_sym.x_tagndx]._n._n_n._n_offset;*/ } } if (ISFCN(syment->n_type)) { last_fcn = syment; } if (syment->n_sclass == C_BLOCK && coff_symbol_ptr->symbol.name[1] == 'b') { *last_block++ = syment; } } syment->_n._n_n._n_offset = native_index; native_index = native_index + 1 + syment->n_numaux; } } } } #endif static int string_size; static void DEFUN(coff_fix_symbol_name,(abfd, symbol, native), bfd *abfd AND asymbol *symbol AND combined_entry_type *native) { unsigned int name_length; union internal_auxent *auxent; CONST char * name = symbol->name; if (name == (char *) NULL) { /* coff symbols always have names, so we'll make one up */ name = symbol->name = "strange"; } name_length = strlen(name); if (native->u.syment.n_sclass == C_FILE) { strncpy(native->u.syment._n._n_name, ".file", SYMNMLEN); auxent = &(native+1)->u.auxent; #ifdef COFF_LONG_FILENAMES if (name_length <= FILNMLEN) { strncpy(auxent->x_file.x_fname, name, FILNMLEN); } else { auxent->x_file.x_n.x_offset = string_size + 4; auxent->x_file.x_n.x_zeroes = 0; string_size += name_length + 1; } #else strncpy(auxent->x_file.x_fname, name, FILNMLEN); if (name_length > FILNMLEN) { name[FILNMLEN] = '\0'; } #endif } else { /* NOT A C_FILE SYMBOL */ if (name_length <= SYMNMLEN) { /* This name will fit into the symbol neatly */ strncpy(native->u.syment._n._n_name, symbol->name, SYMNMLEN); } else { native->u.syment._n._n_n._n_offset = string_size + 4; native->u.syment._n._n_n._n_zeroes = 0; string_size += name_length + 1; } } } static unsigned int DEFUN(coff_write_symbol,(abfd, symbol, native, written), bfd *abfd AND asymbol *symbol AND combined_entry_type *native AND unsigned int written) { unsigned int numaux = native->u.syment.n_numaux; int type = native->u.syment.n_type; int class = native->u.syment.n_sclass; SYMENT buf; unsigned int j; coff_fix_symbol_name(abfd, symbol, native); coff_swap_sym_out(abfd, &native->u.syment, &buf); bfd_write((PTR)& buf, 1, SYMESZ, abfd); for (j = 0; j != native->u.syment.n_numaux; j++) { AUXENT buf1; coff_swap_aux_out(abfd, &( (native + j + 1)->u.auxent), type, class, &buf1); bfd_write((PTR) (&buf1), 1, AUXESZ, abfd); } /* Reuse somewhere in the symbol to keep the index */ set_index(symbol, written); return written + 1 + numaux; } static unsigned int DEFUN(coff_write_alien_symbol,(abfd, symbol, written), bfd *abfd AND asymbol *symbol AND unsigned int written) { /* This symbol has been created by the loader, or come from a non coff format. It has no native element to inherit, make our own */ combined_entry_type *native; combined_entry_type dummy; native = &dummy; native->u.syment.n_type = T_NULL; #ifdef I960 native->u.syment.n_flags = 0; #endif if (symbol->flags & BSF_ABSOLUTE) { native->u.syment.n_scnum = N_ABS; native->u.syment.n_value = symbol->value; } else if (symbol->flags & (BSF_UNDEFINED | BSF_FORT_COMM)) { native->u.syment.n_scnum = N_UNDEF; native->u.syment.n_value = symbol->value; } else if (symbol->flags & BSF_DEBUGGING) { /* remove name so it doesn't take up any space */ symbol->name = ""; } else { native->u.syment.n_scnum = symbol->section->output_section->index + 1; native->u.syment.n_value = symbol->value + symbol->section->output_section->vma + symbol->section->output_offset; #ifdef I960 /* Copy the any flags from the the file hdr into the symbol */ { coff_symbol_type *c = coff_symbol_from(abfd, symbol); if (c != (coff_symbol_type *)NULL) { native->u.syment.n_flags = c->symbol.the_bfd->flags; } } #endif } #ifdef HASPAD1 native->u.syment.pad1[0] = 0; native->u.syment.pad1[0] = 0; #endif native->u.syment.n_type = 0; if (symbol->flags & BSF_LOCAL) native->u.syment.n_sclass = C_STAT; else native->u.syment.n_sclass = C_EXT; native->u.syment.n_numaux = 0; return coff_write_symbol(abfd, symbol, native, written); } static unsigned int DEFUN(coff_write_native_symbol,(abfd, symbol, written), bfd *abfd AND coff_symbol_type *symbol AND unsigned int written) { /* Does this symbol have an ascociated line number - if so then make it remember this symbol index. Also tag the auxent of this symbol to point to the right place in the lineno table */ combined_entry_type *native = symbol->native; alent *lineno = symbol->lineno; if (lineno) { unsigned int count = 0; lineno[count].u.offset = written; if (native->u.syment.n_numaux) { union internal_auxent *a = &((native+1)->u.auxent); a->x_sym.x_fcnary.x_fcn.x_lnnoptr = symbol->symbol.section->output_section->moving_line_filepos; } /* And count and relocate all other linenumbers */ count++; while (lineno[count].line_number) { lineno[count].u.offset += symbol->symbol.section->output_section->vma + symbol->symbol.section->output_offset; count++; } symbol->symbol.section->output_section->moving_line_filepos += count * LINESZ; } return coff_write_symbol(abfd, &( symbol->symbol), native,written); } static void DEFUN(coff_write_symbols,(abfd), bfd *abfd) { unsigned int i; unsigned int limit = bfd_get_symcount(abfd); unsigned int written = 0; asymbol **p; string_size = 0; /* Seek to the right place */ bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET); /* Output all the symbols we have */ written = 0; for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) { asymbol *symbol = *p; coff_symbol_type *c_symbol = coff_symbol_from(abfd, symbol); if (c_symbol == (coff_symbol_type *) NULL || c_symbol->native == (combined_entry_type *)NULL) { written = coff_write_alien_symbol(abfd, symbol, written); } else { written = coff_write_native_symbol(abfd, c_symbol, written); } } bfd_get_symcount(abfd) = written; /* Now write out strings */ if (string_size != 0) { unsigned int size = string_size + 4; size = size; bfd_write((PTR) &size, 1, sizeof(size), abfd); for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) { asymbol *q = *p; size_t name_length = strlen(q->name); int maxlen; coff_symbol_type* c_symbol = coff_symbol_from(abfd, q); maxlen = ((c_symbol != NULL && c_symbol->native != NULL) && (c_symbol->native->u.syment.n_sclass == C_FILE)) ? FILNMLEN : SYMNMLEN; if (name_length > maxlen) { bfd_write((PTR) (q->name), 1, name_length + 1, abfd); } } } else { /* We would normally not write anything here, but we'll write out 4 so that any stupid coff reader which tries to read the string table even when there isn't one won't croak. */ uint32e_type size = 4; size = size; bfd_write((PTR)&size, 1, sizeof(size), abfd); } } /*doc* @subsubsection Writing Relocations To write a relocations, all the back end does is step though the canonical relocation table, and create an @code{internal_reloc}. The symbol index to use is removed from the @code{offset} field in the symbol table supplied, the address comes directly from the sum of the section base address and the relocation offset and the type is dug directly from the howto field. Then the @code{internal_reloc} is swapped into the shape of an @code{external_reloc} and written out to disk. */ static void DEFUN(coff_write_relocs,(abfd), bfd *abfd) { asection *s; for (s = abfd->sections; s != (asection *) NULL; s = s->next) { unsigned int i; struct external_reloc dst; arelent **p = s->orelocation; bfd_seek(abfd, s->rel_filepos, SEEK_SET); for (i = 0; i < s->reloc_count; i++) { struct internal_reloc n; arelent *q = p[i]; memset((PTR)&n, 0, sizeof(n)); n.r_vaddr = q->address + s->vma; if (q->sym_ptr_ptr) { n.r_symndx = get_index((*(q->sym_ptr_ptr))); } #ifdef SELECT_RELOC /* Work out reloc type from what is required */ SELECT_RELOC(n.r_type, q->howto); #else n.r_type = q->howto->type; #endif bfd_swap_reloc_out(abfd, &n, &dst); bfd_write((PTR) &n, 1, RELSZ, abfd); } } } static void DEFUN(coff_write_linenumbers,(abfd), bfd *abfd) { asection *s; for (s = abfd->sections; s != (asection *) NULL; s = s->next) { if (s->lineno_count) { asymbol **q = abfd->outsymbols; bfd_seek(abfd, s->line_filepos, SEEK_SET); /* Find all the linenumbers in this section */ while (*q) { asymbol *p = *q; alent *l = BFD_SEND(p->the_bfd, _get_lineno, (p->the_bfd, p)); if (l) { /* Found a linenumber entry, output */ struct internal_lineno out; LINENO buff; memset( (PTR)&out, 0, sizeof(out)); out.l_lnno = 0; out.l_addr.l_symndx = l->u.offset; coff_swap_lineno_out(abfd, &out, &buff); bfd_write((PTR) &buff, 1, LINESZ, abfd); l++; while (l->line_number) { out.l_lnno = l->line_number; out.l_addr.l_symndx = l->u.offset; coff_swap_lineno_out(abfd, &out, &buff); bfd_write((PTR) &buff, 1, LINESZ, abfd); l++; } } q++; } } } } static asymbol * coff_make_empty_symbol(abfd) bfd *abfd; { coff_symbol_type *new = (coff_symbol_type *) bfd_alloc(abfd, sizeof(coff_symbol_type)); if (new == NULL) { bfd_error = no_memory; return (NULL); } /* on error */ new->native = 0; new->lineno = (alent *) NULL; new->symbol.the_bfd = abfd; return &new->symbol; } static void DEFUN(coff_print_symbol,(ignore_abfd, file, symbol, how), bfd *ignore_abfd AND FILE *file AND asymbol *symbol AND bfd_print_symbol_enum_type how) { switch (how) { case bfd_print_symbol_name_enum: fprintf(file, "%s", symbol->name); break; case bfd_print_symbol_type_enum: fprintf(file, "coff %lx %lx", (unsigned long) coffsymbol(symbol)->native, (unsigned long) coffsymbol(symbol)->lineno); break; case bfd_print_symbol_all_enum: { CONST char *section_name = symbol->section == (asection *) NULL ? "*abs" : symbol->section->name; bfd_print_symbol_vandf((PTR) file, symbol); fprintf(file, " %-5s %s %s %s", section_name, coffsymbol(symbol)->native ? "n" : "g", coffsymbol(symbol)->lineno ? "l" : " ", symbol->name); } break; } } static alent * DEFUN(coff_get_lineno,(ignore_abfd, symbol), bfd *ignore_abfd AND asymbol *symbol) { return coffsymbol(symbol)->lineno; } /* Set flags and magic number of a coff file from architecture and machine type. Result is true if we can represent the arch&type, false if not. */ static boolean DEFUN(coff_set_flags,(abfd, magicp, flagsp), bfd *abfd AND unsigned *magicp AND unsigned short *flagsp) { switch (abfd->obj_arch) { #ifdef I960ROMAGIC case bfd_arch_i960: { unsigned flags; *magicp = I960ROMAGIC; /* ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC : I960RWMAGIC); FIXME??? */ switch (abfd->obj_machine) { case bfd_mach_i960_core: flags = F_I960CORE; break; case bfd_mach_i960_kb_sb: flags = F_I960KB; break; case bfd_mach_i960_mc: flags = F_I960MC; break; case bfd_mach_i960_xa: flags = F_I960XA; break; case bfd_mach_i960_ca: flags = F_I960CA; break; case bfd_mach_i960_ka_sa: flags = F_I960KA; break; default: return false; } *flagsp = flags; return true; } break; #endif #ifdef MIPS case bfd_arch_mips: *magicp = MIPS_MAGIC_2; return true; break; #endif #ifdef I386MAGIC case bfd_arch_i386: *magicp = I386MAGIC; return true; #endif #ifdef MC68MAGIC case bfd_arch_m68k: *magicp = MC68MAGIC; return true; #endif #ifdef MC88MAGIC case bfd_arch_m88k: *magicp = MC88OMAGIC; return true; break; #endif default: /* Unknown architecture */ return false; } return false; } static boolean DEFUN(coff_set_arch_mach,(abfd, arch, machine), bfd *abfd AND enum bfd_architecture arch AND unsigned long machine) { unsigned dummy1; unsigned short dummy2; abfd->obj_arch = arch; abfd->obj_machine = machine; if (arch != bfd_arch_unknown && coff_set_flags(abfd, &dummy1, &dummy2) != true) return false; /* We can't represent this type */ return true; /* We're easy ... */ } /* Calculate the file position for each section. */ static void DEFUN(coff_compute_section_file_positions,(abfd), bfd *abfd) { asection *current; file_ptr sofar = FILHSZ; if (bfd_get_start_address(abfd)) { /* A start address may have been added to the original file. In this case it will need an optional header to record it. */ abfd->flags |= EXEC_P; } if (abfd->flags & EXEC_P) sofar += AOUTSZ; sofar += abfd->section_count * SCNHSZ; for (current = abfd->sections; current != (asection *)NULL; current = current->next) { /* Only deal with sections which have contents */ if (!(current->flags & SEC_HAS_CONTENTS)) continue; /* Align the sections in the file to the same boundary on which they are aligned in virtual memory. I960 doesn't do this (FIXME) so we can stay in sync with Intel. 960 doesn't yet page from files... */ #ifndef I960 sofar = ALIGN(sofar, 1 << current->alignment_power); #endif /* FIXME, in demand paged files, the low order bits of the file offset must match the low order bits of the virtual address. "Low order" is apparently implementation defined. Add code here to round sofar up to match the virtual address. */ current->filepos = sofar; sofar += current->size; } obj_relocbase(abfd) = sofar; } /* SUPPRESS 558 */ /* SUPPRESS 529 */ static boolean DEFUN(coff_write_object_contents,(abfd), bfd *abfd) { asection *current; boolean hasrelocs = false; boolean haslinno = false; file_ptr reloc_base; file_ptr lineno_base; file_ptr sym_base; file_ptr scn_base; file_ptr data_base; unsigned long reloc_size = 0; unsigned long lnno_size = 0; asection *text_sec = NULL; asection *data_sec = NULL; asection *bss_sec = NULL; struct internal_filehdr internal_f; struct internal_aouthdr internal_a; struct icofdata *coff = obj_icof(abfd); bfd_error = system_call_error; if(abfd->output_has_begun == false) { coff_compute_section_file_positions(abfd); } if (abfd->sections != (asection *)NULL) { scn_base = abfd->sections->filepos; } else { scn_base = 0; } if (bfd_seek(abfd, scn_base, SEEK_SET) != 0) return false; reloc_base = obj_relocbase(abfd); /* Make a pass through the symbol table to count line number entries and put them into the correct asections */ coff_count_linenumbers(abfd); data_base = scn_base; /* Work out the size of the reloc and linno areas */ for (current = abfd->sections; current != NULL; current = current->next) { reloc_size += current->reloc_count * RELSZ; lnno_size += current->lineno_count * LINESZ; data_base += SCNHSZ; } lineno_base = reloc_base + reloc_size; sym_base = lineno_base + lnno_size; /* Indicate in each section->line_filepos its actual file address */ for (current = abfd->sections; current != NULL; current = current->next) { if (current->lineno_count) { current->line_filepos = lineno_base; current->moving_line_filepos = lineno_base; lineno_base += current->lineno_count * LINESZ; } else { current->line_filepos = 0; } if (current->reloc_count) { current->rel_filepos = reloc_base; reloc_base += current->reloc_count * sizeof(struct internal_reloc); } else { current->rel_filepos = 0; } } /* Write section headers to the file. */ bfd_seek(abfd, (file_ptr) ((abfd->flags & EXEC_P) ? (FILHSZ + AOUTSZ) : FILHSZ), SEEK_SET); { #if 0 unsigned int pad = abfd->flags & D_PAGED ? data_base : 0; #endif unsigned int pad = 0; for (current = abfd->sections; current != NULL; current = current->next) { struct internal_scnhdr section; strncpy(&(section.s_name[0]), current->name, 8); section.s_vaddr = current->vma + pad; section.s_paddr = current->vma + pad; section.s_size = current->size - pad; /* If this section has no size or is unloadable then the scnptr will be 0 too */ if (current->size - pad == 0 || (current->flags & SEC_LOAD) == 0) { section.s_scnptr = 0; } else { section.s_scnptr = current->filepos; } section.s_relptr = current->rel_filepos; section.s_lnnoptr = current->line_filepos; section.s_nreloc = current->reloc_count; section.s_nlnno = current->lineno_count; if (current->reloc_count != 0) hasrelocs = true; if (current->lineno_count != 0) haslinno = true; if (!strcmp(current->name, _TEXT)) { text_sec = current; section.s_flags = STYP_TEXT; /* kinda stupid */ } else if (!strcmp(current->name, _DATA)) { data_sec = current; section.s_flags = STYP_DATA; /* kinda stupid */ } else if (!strcmp(current->name, _BSS)) { bss_sec = current; section.s_flags = STYP_BSS; /* kinda stupid */ } #ifdef I960 section.s_align = (current->alignment_power ? 1 << current->alignment_power : 0); #endif { SCNHDR buff; swap_scnhdr_out(abfd, §ion, &buff); bfd_write((PTR) (&buff), 1, SCNHSZ, abfd); } pad = 0; } } /* OK, now set up the filehdr... */ internal_f.f_nscns = abfd->section_count; /* We will NOT put a fucking timestamp in the header here. Every time you put it back, I will come in and take it out again. I'm sorry. This field does not belong here. We fill it with a 0 so it compares the same but is not a reasonable time. -- gnu@cygnus.com */ /* Well, I like it, so I'm conditionally compiling it in. steve@cygnus.com */ #ifdef COFF_TIMESTAMP internal_f.f_timdat = time(0); #else internal_f.f_timdat = 0; #endif if (bfd_get_symcount(abfd) != 0) internal_f.f_symptr = sym_base; else internal_f.f_symptr = 0; internal_f.f_flags = 0; if (abfd->flags & EXEC_P) internal_f.f_opthdr = AOUTSZ; else internal_f.f_opthdr = 0; if (!hasrelocs) internal_f.f_flags |= F_RELFLG; if (!haslinno) internal_f.f_flags |= F_LNNO; if (0 == bfd_get_symcount(abfd)) internal_f.f_flags |= F_LSYMS; if (abfd->flags & EXEC_P) internal_f.f_flags |= F_EXEC; #if M88 internal_f.f_flags |= F_AR32W; #else if (!abfd->xvec->byteorder_big_p) internal_f.f_flags |= F_AR32WR; #endif /* FIXME, should do something about the other byte orders and architectures. */ /* Set up architecture-dependent stuff */ { int magic = 0; int flags = 0; coff_set_flags(abfd, &magic, &internal_f.f_flags); internal_f.f_magic = magic; /* ...and the "opt"hdr... */ #ifdef I960 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC); #endif #if M88 internal_a.magic = PAGEMAGICBCS; #endif } /* Now should write relocs, strings, syms */ obj_sym_filepos(abfd) = sym_base; if (bfd_get_symcount(abfd) != 0) { coff_renumber_symbols(abfd); coff_mangle_symbols(abfd); coff_write_symbols(abfd); coff_write_linenumbers(abfd); coff_write_relocs(abfd); } if (text_sec) { internal_a.tsize = text_sec->size; internal_a.text_start =text_sec->size ? text_sec->vma : 0; } if (data_sec) { internal_a.dsize = data_sec->size; internal_a.data_start = data_sec->size ? data_sec->vma : 0; } if (bss_sec) { internal_a.bsize = bss_sec->size; } internal_a.entry = bfd_get_start_address(abfd); internal_f.f_nsyms = bfd_get_symcount(abfd); /* now write them */ if (bfd_seek(abfd, 0L, SEEK_SET) != 0) return false; { FILHDR buff; bfd_swap_filehdr_out(abfd, &internal_f, &buff); bfd_write((PTR) &buff, 1, FILHSZ, abfd); } if (abfd->flags & EXEC_P) { AOUTHDR buff; bfd_swap_aouthdr_out(abfd, &internal_a, &buff); bfd_write((PTR) &buff, 1, AOUTSZ, abfd); } return true; } /* this function transforms the offsets into the symbol table into pointers to syments. */ static void DEFUN(coff_pointerize_aux,(abfd, table_base, type, class, auxent), bfd *abfd AND combined_entry_type *table_base AND int type AND int class AND combined_entry_type *auxent) { /* Don't bother if this is a file or a section */ if (class == C_STAT && type == T_NULL) return; if (class == C_FILE) return; /* Otherwise patch up */ if (ISFCN(type) || ISTAG(class) || class == C_BLOCK) { auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; auxent->fix_end = 1; } if (auxent->u.auxent.x_sym.x_tagndx.l != 0) { auxent->u.auxent.x_sym.x_tagndx.p = table_base + auxent->u.auxent.x_sym.x_tagndx.l; auxent->fix_tag = 1; } } static boolean DEFUN(coff_set_section_contents,(abfd, section, location, offset, count), bfd *abfd AND sec_ptr section AND PTR location AND file_ptr offset AND size_t count) { if (abfd->output_has_begun == false) /* set by bfd.c handler */ coff_compute_section_file_positions(abfd); bfd_seek(abfd, (file_ptr) (section->filepos + offset), SEEK_SET); if (count != 0) { return (bfd_write(location, 1, count, abfd) == count) ? true : false; } return true; } #if 0 static boolean coff_close_and_cleanup(abfd) bfd *abfd; { if (!bfd_read_p(abfd)) switch (abfd->format) { case bfd_archive: if (!_bfd_write_archive_contents(abfd)) return false; break; case bfd_object: if (!coff_write_object_contents(abfd)) return false; break; default: bfd_error = invalid_operation; return false; } /* We depend on bfd_close to free all the memory on the obstack. */ /* FIXME if bfd_release is not using obstacks! */ return true; } #endif static PTR buy_and_read(abfd, where, seek_direction, size) bfd *abfd; file_ptr where; int seek_direction; size_t size; { PTR area = (PTR) bfd_alloc(abfd, size); if (!area) { bfd_error = no_memory; return (NULL); } bfd_seek(abfd, where, seek_direction); if (bfd_read(area, 1, size, abfd) != size) { bfd_error = system_call_error; return (NULL); } /* on error */ return (area); } /* buy_and_read() */ static char * DEFUN(build_string_table,(abfd), bfd *abfd) { char string_table_size_buffer[4]; unsigned int string_table_size; char *string_table; /* At this point we should be "seek"'d to the end of the symbols === the symbol table size. */ if (bfd_read((char *) string_table_size_buffer, sizeof(string_table_size_buffer), 1, abfd) != sizeof(string_table_size)) { bfd_error = system_call_error; return (NULL); } /* on error */ string_table_size = bfd_h_get_32(abfd, string_table_size_buffer); if ((string_table = (PTR) bfd_alloc(abfd, string_table_size -= 4)) == NULL) { bfd_error = no_memory; return (NULL); } /* on mallocation error */ if (bfd_read(string_table, string_table_size, 1, abfd) != string_table_size) { bfd_error = system_call_error; return (NULL); } return string_table; } /* read a symbol table into freshly mallocated memory, swap it, and knit the symbol names into a normalized form. By normalized here I mean that all symbols have an n_offset pointer that points to a NULL terminated string. Oh, and the first symbol MUST be a C_FILE. If there wasn't one there before, put one there. */ static combined_entry_type * DEFUN(get_normalized_symtab,(abfd), bfd *abfd) { combined_entry_type *internal; combined_entry_type *internal_ptr; combined_entry_type *internal_end; SYMENT *raw; SYMENT *raw_src; SYMENT *raw_end; char *string_table = NULL; unsigned long size; unsigned long string_table_size = 0; unsigned int raw_size; if (obj_raw_syments(abfd) != (combined_entry_type *)NULL) { return obj_raw_syments(abfd); } if ((size = bfd_get_symcount(abfd) * sizeof(combined_entry_type)) == 0) { bfd_error = no_symbols; return (NULL); } internal = (combined_entry_type *)bfd_alloc(abfd, size); internal_end = internal + bfd_get_symcount(abfd); raw_size = bfd_get_symcount(abfd) * SYMESZ; raw = (SYMENT *)bfd_alloc(abfd,raw_size); if (bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET) == -1 || bfd_read((PTR)raw, raw_size, 1, abfd) != raw_size) { bfd_error = system_call_error; return (NULL); } /* mark the end of the symbols */ raw_end = raw + bfd_get_symcount(abfd); /* FIXME SOMEDAY. A string table size of zero is very weird, but probably possible. If one shows up, it will probably kill us. */ /* Swap all the raw entries */ for (raw_src = raw, internal_ptr = internal; raw_src < raw_end; raw_src++, internal_ptr++) { unsigned int i; coff_swap_sym_in(abfd, raw_src,&internal_ptr->u.syment); internal_ptr->fix_tag = 0; internal_ptr->fix_end = 0; for (i = internal_ptr->u.syment.n_numaux; i; --i, raw_src++, internal_ptr++) { (internal_ptr+1)->fix_tag = 0; (internal_ptr+1)->fix_end = 0; coff_swap_aux_in(abfd, (AUXENT *)(raw_src +1), internal_ptr->u.syment.n_type, internal_ptr->u.syment.n_sclass, & (internal_ptr+1)->u.auxent); coff_pointerize_aux(abfd, internal, internal_ptr->u.syment.n_type, internal_ptr->u.syment.n_sclass, internal_ptr +1); } } /* Free all the raw stuff */ bfd_release(abfd, raw_src); for (internal_ptr = internal; internal_ptr < internal_end; internal_ptr ++) { if (internal_ptr->u.syment.n_sclass == C_FILE) { /* make a file symbol point to the name in the auxent, since the text ".file" is redundant */ if ((internal_ptr+1)->u.auxent.x_file.x_n.x_zeroes == 0) { /* the filename is a long one, point into the string table */ if (string_table == NULL) { string_table = build_string_table(abfd); } internal_ptr->u.syment._n._n_n._n_offset = (int) (string_table - 4 + (internal_ptr+1)->u.auxent.x_file.x_n.x_offset); } else { /* ordinary short filename, put into memory anyway */ internal_ptr->u.syment._n._n_n._n_offset = (int) copy_name(abfd, (internal_ptr+1)->u.auxent.x_file.x_fname, FILNMLEN); } } else { if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) { /* This is a "short" name. Make it long. */ unsigned long i = 0; char *newstring = NULL; /* find the length of this string without walking into memory that isn't ours. */ for (i = 0; i < 8; ++i) { if (internal_ptr->u.syment._n._n_name[i] == '\0') { break; } /* if end of string */ } /* possible lengths of this string. */ if ((newstring = (PTR) bfd_alloc(abfd, ++i)) == NULL) { bfd_error = no_memory; return (NULL); } /* on error */ bzero(newstring, i); strncpy(newstring, internal_ptr->u.syment._n._n_name, i-1); internal_ptr->u.syment._n._n_n._n_offset = (int) newstring; internal_ptr->u.syment._n._n_n._n_zeroes = 0; } else { /* This is a long name already. Just point it at the string in memory. */ if (string_table == NULL) { string_table = build_string_table(abfd); } internal_ptr->u.syment._n._n_n._n_offset = (int) (string_table - 4 + internal_ptr->u.syment._n._n_n._n_offset); } } internal_ptr += internal_ptr->u.syment.n_numaux; } obj_raw_syments(abfd) = internal; obj_string_table(abfd) = string_table; return (internal); } /* get_normalized_symtab() */ static struct sec * DEFUN(section_from_bfd_index,(abfd, index), bfd *abfd AND int index) { if (index > 0) { struct sec *answer = abfd->sections; while (--index) { answer = answer->next; } return answer; } return 0; } /*doc* @subsubsection Reading Linenumbers Createing the linenumber table is done by reading in the entire coff linenumber table, and creating another table for internal use. A coff line number table is structured so that each function is marked as having a line number of 0. Each line within the function is an offset from the first line in the function. The base of the line number information for the table is stored in the symbol associated with the function. The information is copied from the external to the internal table, and each symbol which marks a function is marked by pointing its... **How does this work ?** */ static boolean coff_slurp_line_table(abfd, asect) bfd *abfd; asection *asect; { LINENO *native_lineno; alent *lineno_cache; BFD_ASSERT(asect->lineno == (alent *) NULL); native_lineno = (LINENO *) buy_and_read(abfd, asect->line_filepos, SEEK_SET, (size_t) (LINESZ * asect->lineno_count)); lineno_cache = (alent *) bfd_alloc(abfd, (size_t) ((asect->lineno_count + 1) * sizeof(alent))); if (lineno_cache == NULL) { bfd_error = no_memory; return false; } else { unsigned int counter = 0; alent *cache_ptr = lineno_cache; LINENO *src = native_lineno; while (counter < asect->lineno_count) { struct internal_lineno dst; coff_swap_lineno_in(abfd, src, &dst); cache_ptr->line_number = dst.l_lnno; if (cache_ptr->line_number == 0) { coff_symbol_type *sym = (coff_symbol_type *) (dst.l_addr.l_symndx + obj_symbol_slew(abfd) + obj_raw_syments(abfd))->u.syment._n._n_n._n_zeroes; cache_ptr->u.sym = (asymbol *) sym; sym->lineno = cache_ptr; } else { cache_ptr->u.offset = dst.l_addr.l_paddr - bfd_section_vma(abfd, asect); } /* If no linenumber expect a symbol index */ cache_ptr++; src++; counter++; } cache_ptr->line_number = 0; } asect->lineno = lineno_cache; /* FIXME, free native_lineno here, or use alloca or something. */ return true; } /* coff_slurp_line_table() */ static boolean DEFUN(coff_slurp_symbol_table,(abfd), bfd *abfd) { combined_entry_type *native_symbols; coff_symbol_type *cached_area; unsigned int *table_ptr; unsigned int number_of_symbols = 0; if (obj_symbols(abfd)) return true; bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET); /* Read in the symbol table */ if ((native_symbols = get_normalized_symtab(abfd)) == NULL) { return (false); } /* on error */ /* Allocate enough room for all the symbols in cached form */ cached_area = (coff_symbol_type *) bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(coff_symbol_type))); if (cached_area == NULL) { bfd_error = no_memory; return false; } /* on error */ table_ptr = (unsigned int *) bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(unsigned int))); if (table_ptr == NULL) { bfd_error = no_memory; return false; } else { coff_symbol_type *dst = cached_area; unsigned int last_native_index = bfd_get_symcount(abfd); unsigned int this_index = 0; while (this_index < last_native_index) { combined_entry_type *src = native_symbols + this_index; table_ptr[this_index] = number_of_symbols; dst->symbol.the_bfd = abfd; dst->symbol.name = (char *)(src->u.syment._n._n_n._n_offset); /* We use the native name field to point to the cached field */ src->u.syment._n._n_n._n_zeroes = (int) dst; dst->symbol.section = section_from_bfd_index(abfd, src->u.syment.n_scnum); switch (src->u.syment.n_sclass) { #ifdef I960 case C_LEAFEXT: #if 0 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma; dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL; dst->symbol.flags |= BSF_NOT_AT_END; #endif /* Fall through to next case */ #endif case C_EXT: if ((src->u.syment.n_scnum) == 0) { if ((src->u.syment.n_value) == 0) { dst->symbol.flags = BSF_UNDEFINED; dst->symbol.value= 0; } else { dst->symbol.flags = BSF_FORT_COMM; dst->symbol.value = (src->u.syment.n_value); } } else { /* Base the value as an index from the base of the section */ if (dst->symbol.section == (asection *) NULL) { dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL | BSF_ABSOLUTE; dst->symbol.value = src->u.syment.n_value; } else { dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL; dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma; } if (ISFCN((src->u.syment.n_type))) { /* A function ext does not go at the end of a file */ dst->symbol.flags |= BSF_NOT_AT_END; } } break; case C_STAT: /* static */ #ifdef I960 case C_LEAFSTAT: /* static leaf procedure */ #endif case C_LABEL: /* label */ dst->symbol.flags = BSF_LOCAL; /* Base the value as an index from the base of the section */ dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma; break; case C_MOS: /* member of structure */ case C_EOS: /* end of structure */ case C_REGPARM: /* register parameter */ case C_REG: /* register variable */ #ifdef C_AUTOARG case C_AUTOARG: /* 960-specific storage class */ #endif case C_TPDEF: /* type definition */ case C_ARG: case C_AUTO: /* automatic variable */ case C_FIELD: /* bit field */ case C_ENTAG: /* enumeration tag */ case C_MOE: /* member of enumeration */ case C_MOU: /* member of union */ case C_UNTAG: /* union tag */ dst->symbol.flags = BSF_DEBUGGING; dst->symbol.value = (src->u.syment.n_value); break; case C_FILE: /* file name */ case C_STRTAG: /* structure tag */ dst->symbol.flags = BSF_DEBUGGING; dst->symbol.value = (src->u.syment.n_value); break; case C_BLOCK: /* ".bb" or ".eb" */ case C_FCN: /* ".bf" or ".ef" */ dst->symbol.flags = BSF_LOCAL; /* Base the value as an index from the base of the section */ dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma; break; case C_EFCN: /* physical end of function */ case C_NULL: case C_EXTDEF: /* external definition */ case C_ULABEL: /* undefined label */ case C_USTATIC: /* undefined static */ case C_LINE: /* line # reformatted as symbol table entry */ case C_ALIAS: /* duplicate tag */ case C_HIDDEN: /* ext symbol in dmert public lib */ default: abort(); dst->symbol.flags = BSF_DEBUGGING; dst->symbol.value = (src->u.syment.n_value); break; } BFD_ASSERT(dst->symbol.flags != 0); dst->native = src; dst->symbol.udata = 0; dst->lineno = (alent *) NULL; this_index += (src->u.syment.n_numaux) + 1; dst++; number_of_symbols++; } /* walk the native symtab */ } /* bfdize the native symtab */ obj_symbols(abfd) = cached_area; obj_raw_syments(abfd) = native_symbols; bfd_get_symcount(abfd) = number_of_symbols; obj_convert(abfd) = table_ptr; /* Slurp the line tables for each section too */ { asection *p; p = abfd->sections; while (p) { coff_slurp_line_table(abfd, p); p = p->next; } } return true; } /* coff_slurp_symbol_table() */ static unsigned int coff_get_symtab_upper_bound(abfd) bfd *abfd; { if (!coff_slurp_symbol_table(abfd)) return 0; return (bfd_get_symcount(abfd) + 1) * (sizeof(coff_symbol_type *)); } static unsigned int coff_get_symtab(abfd, alocation) bfd *abfd; asymbol **alocation; { unsigned int counter = 0; coff_symbol_type *symbase; coff_symbol_type **location = (coff_symbol_type **) (alocation); if (!coff_slurp_symbol_table(abfd)) return 0; for (symbase = obj_symbols(abfd); counter++ < bfd_get_symcount(abfd);) *(location++) = symbase++; *location++ = 0; return bfd_get_symcount(abfd); } static unsigned int coff_get_reloc_upper_bound(abfd, asect) bfd *abfd; sec_ptr asect; { if (bfd_get_format(abfd) != bfd_object) { bfd_error = invalid_operation; return 0; } return (asect->reloc_count + 1) * sizeof(arelent *); } /*doc* @subsubsection Reading Relocations Coff relocations are easily transformed into the internal bfd form (@code{arelent}). Reading a coff relocation table is done in the following stages: @itemize @bullet @item The entire coff relocation table is read into memory. @item Each relocation is processed in turn, first it is swapped from the external to the internal form. @item The symbol referenced in the relocation's symbol index is turned into a pointer into the canonical symbol table. Note that this table is the same as the one returned by a call to @code{bfd_canonicalize_symtab}. The back end will call the routine and save the result if a canonicalization hasn't been done. @item The reloc index is turned into a pointer to a howto structure, in a back end specific way. For instance, the 386 and 960 use the @code{r_type} to directly produce an index into a howto table vector; the 88k subtracts a number from the @code{r_type} field and creates an addend field. @end itemize */ static boolean DEFUN(coff_slurp_reloc_table,(abfd, asect, symbols), bfd *abfd AND sec_ptr asect AND asymbol **symbols) { RELOC *native_relocs; arelent *reloc_cache; if (asect->relocation) return true; if (asect->reloc_count == 0) return true; if (!coff_slurp_symbol_table(abfd)) return false; native_relocs = (RELOC *) buy_and_read(abfd, asect->rel_filepos, SEEK_SET, (size_t) (RELSZ * asect->reloc_count)); reloc_cache = (arelent *) bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent))); if (reloc_cache == NULL) { bfd_error = no_memory; return false; } { /* on error */ arelent *cache_ptr; RELOC *src; for (cache_ptr = reloc_cache, src = native_relocs; cache_ptr < reloc_cache + asect->reloc_count; cache_ptr++, src++) { struct internal_reloc dst; asymbol *ptr; bfd_swap_reloc_in(abfd, src, &dst); dst.r_symndx += obj_symbol_slew(abfd); cache_ptr->sym_ptr_ptr = symbols + obj_convert(abfd)[dst.r_symndx]; ptr = *(cache_ptr->sym_ptr_ptr); cache_ptr->address = dst.r_vaddr; /* The symbols definitions that we have read in have been relocated as if their sections started at 0. But the offsets refering to the symbols in the raw data have not been modified, so we have to have a negative addend to compensate. Note that symbols which used to be common must be left alone */ if (ptr->the_bfd == abfd && ptr->section != (asection *) NULL && ((ptr->flags & BSF_OLD_COMMON)== 0)) { #ifndef M88 cache_ptr->addend = -(ptr->section->vma + ptr->value); #else cache_ptr->addend = 0; #endif } else { cache_ptr->addend = 0; } cache_ptr->address -= asect->vma; cache_ptr->section = (asection *) NULL; #if I386 cache_ptr->howto = howto_table + dst.r_type; #endif #if I960 cache_ptr->howto = howto_table + dst.r_type; #endif #if M68 cache_ptr->howto = howto_table + dst.r_type - R_RELBYTE; #endif #if M88 if (dst.r_type >= R_PCR16L && dst.r_type <= R_VRT32) { cache_ptr->howto = howto_table + dst.r_type - R_PCR16L; cache_ptr->addend += dst.r_offset << 16; } else { BFD_ASSERT(0); } #endif } } asect->relocation = reloc_cache; return true; } /* This is stupid. This function should be a boolean predicate */ static unsigned int coff_canonicalize_reloc(abfd, section, relptr, symbols) bfd *abfd; sec_ptr section; arelent **relptr; asymbol **symbols; { arelent *tblptr = section->relocation; unsigned int count = 0; if (!(tblptr || coff_slurp_reloc_table(abfd, section, symbols))) return 0; tblptr = section->relocation; if (!tblptr) return 0; for (; count++ < section->reloc_count;) *relptr++ = tblptr++; *relptr = 0; return section->reloc_count; } /* provided a bfd, a section and an offset into the section, calculate and return the name of the source file and the line nearest to the wanted location. */ static boolean DEFUN(coff_find_nearest_line,(abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr), bfd *abfd AND asection *section AND asymbol **symbols AND bfd_vma offset AND CONST char **filename_ptr AND CONST char **functionname_ptr AND unsigned int *line_ptr) { static bfd *cache_abfd; static asection *cache_section; static bfd_vma cache_offset; static unsigned int cache_i; static alent *cache_l; unsigned int i = 0; struct icofdata *cof = obj_icof(abfd); /* Run through the raw syments if available */ combined_entry_type *p; alent *l; unsigned int line_base = 0; *filename_ptr = 0; *functionname_ptr = 0; *line_ptr = 0; /* Don't try and find line numbers in a non coff file */ if (abfd->xvec->flavour != bfd_target_coff_flavour_enum) return false; if (cof == (struct icofdata *)NULL) return false; p = cof->raw_syments; for (i = 0; i < cof->raw_syment_count; i++) { if (p->u.syment.n_sclass == C_FILE) { /* File name has been moved into symbol */ *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; break; } p += 1 + p->u.syment.n_numaux; } /* Now wander though the raw linenumbers of the section */ /* If this is the same bfd as we were previously called with and this is the same section, and the offset we want is further down then we can prime the lookup loop */ if (abfd == cache_abfd && section == cache_section && offset >= cache_offset) { i = cache_i; l = cache_l; } else { i = 0; l = section->lineno; } for (; i < section->lineno_count; i++) { if (l->line_number == 0) { /* Get the symbol this line number points at */ coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym); *functionname_ptr = coff->symbol.name; if (coff->native) { combined_entry_type *s = coff->native; s = s + 1 + s->u.syment.n_numaux; /* S should now point to the .bf of the function */ if (s->u.syment.n_numaux) { /* The linenumber is stored in the auxent */ union internal_auxent *a = &((s + 1)->u.auxent); line_base = a->x_sym.x_misc.x_lnsz.x_lnno; } } } else { if (l->u.offset > offset) break; *line_ptr = l->line_number + line_base + 1; } l++; } cache_abfd = abfd; cache_section = section; cache_offset = offset; cache_i = i; cache_l = l; return true; } #ifdef GNU960 file_ptr coff_sym_filepos(abfd) bfd *abfd; { return obj_sym_filepos(abfd); } #endif static int DEFUN(coff_sizeof_headers,(abfd, reloc), bfd *abfd AND boolean reloc) { size_t size; if (reloc == false) { size = FILHSZ + AOUTSZ; } else { size = FILHSZ; } size += abfd->section_count * SCNHSZ; return size; } #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p #define coff_slurp_armap bfd_slurp_coff_armap #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table #define coff_truncate_arname bfd_dont_truncate_arname #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt #define coff_get_section_contents bfd_generic_get_section_contents #define coff_close_and_cleanup bfd_generic_close_and_cleanup #define coff_bfd_debug_info_start bfd_void #define coff_bfd_debug_info_end bfd_void #define coff_bfd_debug_info_accumulate bfd_void