/* Support for the generic parts of most COFF variants, for BFD. Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. Written by Cygnus Support. This file is part of BFD, the Binary File Descriptor library. 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. */ /* Most of this hacked by Steve Chamberlain, sac@cygnus.com */ /* SECTION coff backends BFD supports a number of different flavours of coff format. The major differences between formats are the sizes and alignments of fields in structures on disk, and the occasional extra field. Coff in all its varieties is implemented with a few common files and a number of implementation specific files. For example, The 88k bcs coff format is implemented in the file @file{coff-m88k.c}. This file @code{#include}s @file{coff/m88k.h} which defines the external structure of the coff format for the 88k, and @file{coff/internal.h} which defines the internal structure. @file{coff-m88k.c} also defines the relocations used by the 88k format @xref{Relocations}. The Intel i960 processor version of coff is implemented in @file{coff-i960.c}. This file has the same structure as @file{coff-m88k.c}, except that it includes @file{coff/i960.h} rather than @file{coff-m88k.h}. SUBSECTION Porting to a new version of coff The recommended method is to select from the existing implementations the version of coff which is most like the one you want to use. For example, we'll say that i386 coff is the one you select, and that your coff flavour is called foo. Copy @file{i386coff.c} to @file{foocoff.c}, copy @file{../include/coff/i386.h} to @file{../include/coff/foo.h}, and add the lines to @file{targets.c} and @file{Makefile.in} so that your new back end is used. Alter the shapes of the structures in @file{../include/coff/foo.h} so that they match what you need. You will probably also have to add @code{#ifdef}s to the code in @file{coff/internal.h} and @file{coffcode.h} if your version of coff is too wild. You can verify that your new BFD backend works quite simply by building @file{objdump} from the @file{binutils} directory, and making sure that its version of what's going on and your host system's 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 File layout The Coff backend is split into generic routines that are applicable to any Coff target and routines that are specific to a particular target. The target-specific routines are further split into ones which are basically the same for all Coff targets except that they use the external symbol format or use different values for certain constants. The generic routines are in @file{coffgen.c}. These routines work for any Coff target. They use some hooks into the target specific code; the hooks are in a @code{bfd_coff_backend_data} structure, one of which exists for each target. The essentially similar target-specific routines are in @file{coffcode.h}. This header file includes executable C code. The various Coff targets first include the appropriate Coff header file, make any special defines that are needed, and then include @file{coffcode.h}. Some of the Coff targets then also have additional routines in the target source file itself. For example, @file{coff-i960.c} includes @file{coff/internal.h} and @file{coff/i960.h}. It then defines a few constants, such as @code{I960}, and includes @file{coffcode.h}. Since the i960 has complex relocation types, @file{coff-i960.c} also includes some code to manipulate the i960 relocs. This code is not in @file{coffcode.h} because it would not be used by any other target. SUBSUBSECTION Bit twiddling Each flavour of coff supported in BFD has its own header file describing the external layout of the structures. There is also an internal description of the coff layout, in @file{coff/internal.h}. 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 @file{coffcode.h}. E.g., 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 to 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. More of the bit twiddlers are exported for @code{gas}; @code{coff_swap_aux_out}, @code{coff_swap_sym_out}, @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out}, @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out}, @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track of all the symbol table and reloc drudgery itself, thereby saving the internal BFD overhead, but uses BFD to swap things on the way out, making cross ports much safer. Doing so also allows BFD (and thus the linker) to use the same header files as @code{gas}, which makes one avenue to disaster disappear. 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 problem by keeping the original symbol table around, "behind the scenes". When a symbol table is requested (through a call to @code{bfd_canonicalize_symtab}), a request gets through to @code{coff_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 change 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 at the next. Another pass is made over the table. All symbols which mark file names (<> 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 attached 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 the symbol was taken, 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. 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. This transformation uses the <> field of the @code{asymbol}'s @code{asection} @xref{Sections}. o <> 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 into the index into the symbol table of the asymbol. o <> 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 table to the file. */ /* INTERNAL_DEFINITION coff_symbol_type DESCRIPTION The hidden information for an <> is described in a <>: CODE_FRAGMENT . .typedef struct coff_ptr_struct .{ . . {* Remembers the offset from the first symbol in the file for . this symbol. Generated by coff_renumber_symbols. *} .unsigned int offset; . . {* Should the value of this symbol be renumbered. Used for . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *} .unsigned int fix_value : 1; . . {* Should the tag field of this symbol be renumbered. . Created by coff_pointerize_aux. *} .unsigned int fix_tag : 1; . . {* Should the endidx field of this symbol be renumbered. . Created by coff_pointerize_aux. *} .unsigned int fix_end : 1; . . {* Should the x_csect.x_scnlen field be renumbered. . Created by coff_pointerize_aux. *} .unsigned int fix_scnlen : 1; . . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the . index into the line number entries. Set by . coff_slurp_symbol_table. *} .unsigned int fix_line : 1; . . {* 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; . . {* Have the line numbers been relocated yet ? *} .boolean done_lineno; .} coff_symbol_type; */ #ifdef COFF_WITH_PE #include "peicode.h" #else #include "coffswap.h" #endif #define STRING_SIZE_SIZE (4) /* void warning(); */ /* * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags(). * NOTE: If you add to/change this routine, you should mirror the changes * in styp_to_sec_flags(). */ static long sec_to_styp_flags (sec_name, sec_flags) CONST char *sec_name; flagword sec_flags; { long styp_flags = 0; if (!strcmp (sec_name, _TEXT)) { styp_flags = STYP_TEXT; } else if (!strcmp (sec_name, _DATA)) { styp_flags = STYP_DATA; } else if (!strcmp (sec_name, _BSS)) { styp_flags = STYP_BSS; #ifdef _COMMENT } else if (!strcmp (sec_name, _COMMENT)) { styp_flags = STYP_INFO; #endif /* _COMMENT */ #ifdef _LIB } else if (!strcmp (sec_name, _LIB)) { styp_flags = STYP_LIB; #endif /* _LIB */ #ifdef _LIT } else if (!strcmp (sec_name, _LIT)) { styp_flags = STYP_LIT; #endif /* _LIT */ } else if (!strcmp (sec_name, ".debug")) { #ifdef STYP_DEBUG styp_flags = STYP_DEBUG; #else styp_flags = STYP_INFO; #endif } else if (!strncmp (sec_name, ".stab", 5)) { styp_flags = STYP_INFO; } #ifdef COFF_WITH_PE else if (!strcmp (sec_name, ".edata")) { styp_flags = STYP_DATA; } #endif #ifdef RS6000COFF_C else if (!strcmp (sec_name, _PAD)) { styp_flags = STYP_PAD; } else if (!strcmp (sec_name, _LOADER)) { styp_flags = STYP_LOADER; } #endif /* Try and figure out what it should be */ else if (sec_flags & SEC_CODE) { styp_flags = STYP_TEXT; } else if (sec_flags & SEC_DATA) { styp_flags = STYP_DATA; } else if (sec_flags & SEC_READONLY) { #ifdef STYP_LIT /* 29k readonly text/data section */ styp_flags = STYP_LIT; #else styp_flags = STYP_TEXT; #endif /* STYP_LIT */ } else if (sec_flags & SEC_LOAD) { styp_flags = STYP_TEXT; } else if (sec_flags & SEC_ALLOC) { styp_flags = STYP_BSS; } #ifdef STYP_NOLOAD if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0) styp_flags |= STYP_NOLOAD; #endif #ifdef COFF_WITH_PE if (sec_flags & SEC_LINK_ONCE) styp_flags |= IMAGE_SCN_LNK_COMDAT; #endif return (styp_flags); } /* * Return a word with SEC_* flags set to represent the incoming * STYP_* flags (from scnhdr.s_flags). The inverse of this * function is sec_to_styp_flags(). * NOTE: If you add to/change this routine, you should mirror the changes * in sec_to_styp_flags(). */ static flagword styp_to_sec_flags (abfd, hdr, name) bfd *abfd; PTR hdr; const char *name; { struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr; long styp_flags = internal_s->s_flags; flagword sec_flags = 0; #ifdef STYP_NOLOAD if (styp_flags & STYP_NOLOAD) { sec_flags |= SEC_NEVER_LOAD; } #endif /* STYP_NOLOAD */ /* For 386 COFF, at least, an unloadable text or data section is actually a shared library section. */ if (styp_flags & STYP_TEXT) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC; } else if (styp_flags & STYP_DATA) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC; } else if (styp_flags & STYP_BSS) { #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY; else #endif sec_flags |= SEC_ALLOC; } else if (styp_flags & STYP_INFO) { /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is defined. coff_compute_section_file_positions uses COFF_PAGE_SIZE to ensure that the low order bits of the section VMA and the file offset match. If we don't know COFF_PAGE_SIZE, we can't ensure the correct correspondence, and demand page loading of the file will fail. */ #ifdef COFF_PAGE_SIZE sec_flags |= SEC_DEBUGGING; #endif } else if (styp_flags & STYP_PAD) { sec_flags = 0; } else if (strcmp (name, _TEXT) == 0) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC; } else if (strcmp (name, _DATA) == 0) { if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY; else sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC; } else if (strcmp (name, _BSS) == 0) { #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY if (sec_flags & SEC_NEVER_LOAD) sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY; else #endif sec_flags |= SEC_ALLOC; } else if (strcmp (name, ".debug") == 0 #ifdef _COMMENT || strcmp (name, _COMMENT) == 0 #endif || strncmp (name, ".stab", 5) == 0) { #ifdef COFF_PAGE_SIZE sec_flags |= SEC_DEBUGGING; #endif } #ifdef _LIB else if (strcmp (name, _LIB) == 0) ; #endif #ifdef _LIT else if (strcmp (name, _LIT) == 0) { sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY; } #endif else { sec_flags |= SEC_ALLOC | SEC_LOAD; } #ifdef STYP_LIT /* A29k readonly text/data section type */ if ((styp_flags & STYP_LIT) == STYP_LIT) { sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY); } #endif /* STYP_LIT */ #ifdef STYP_OTHER_LOAD /* Other loaded sections */ if (styp_flags & STYP_OTHER_LOAD) { sec_flags = (SEC_LOAD | SEC_ALLOC); } #endif /* STYP_SDATA */ #ifdef COFF_WITH_PE if (styp_flags & IMAGE_SCN_LNK_REMOVE) sec_flags |= SEC_EXCLUDE; if (styp_flags & IMAGE_SCN_LNK_COMDAT) { sec_flags |= SEC_LINK_ONCE; /* Unfortunately, the PE format stores essential information in the symbol table, of all places. We need to extract that information now, so that objdump and the linker will know how to handle the section without worrying about the symbols. We can't call slurp_symtab, because the linker doesn't want the swapped symbols. */ if (_bfd_coff_get_external_symbols (abfd)) { bfd_byte *esym, *esymend; esym = (bfd_byte *) obj_coff_external_syms (abfd); esymend = esym + obj_raw_syment_count (abfd) * SYMESZ; while (esym < esymend) { struct internal_syment isym; bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &isym); if (sizeof (internal_s->s_name) > SYMNMLEN) { /* This case implies that the matching symbol name will be in the string table. */ abort (); } if (isym.n_sclass == C_STAT && isym.n_type == T_NULL && isym.n_numaux == 1) { char buf[SYMNMLEN + 1]; const char *symname; symname = _bfd_coff_internal_syment_name (abfd, &isym, buf); if (symname == NULL) abort (); if (strcmp (name, symname) == 0) { union internal_auxent aux; /* This is the section symbol. */ bfd_coff_swap_aux_in (abfd, (PTR) (esym + SYMESZ), isym.n_type, isym.n_sclass, 0, isym.n_numaux, (PTR) &aux); switch (aux.x_scn.x_comdat) { case IMAGE_COMDAT_SELECT_NODUPLICATES: sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY; break; default: case IMAGE_COMDAT_SELECT_ANY: sec_flags |= SEC_LINK_DUPLICATES_DISCARD; break; case IMAGE_COMDAT_SELECT_SAME_SIZE: sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE; break; case IMAGE_COMDAT_SELECT_EXACT_MATCH: sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; break; case IMAGE_COMDAT_SELECT_ASSOCIATIVE: /* FIXME: This is not currently implemented. */ sec_flags |= SEC_LINK_DUPLICATES_DISCARD; break; } break; } } esym += (isym.n_numaux + 1) * SYMESZ; } } } #endif return (sec_flags); } #define get_index(symbol) ((symbol)->udata.i) /* INTERNAL_DEFINITION bfd_coff_backend_data CODE_FRAGMENT Special entry points for gdb to swap in coff symbol table parts: .typedef struct .{ . void (*_bfd_coff_swap_aux_in) PARAMS (( . bfd *abfd, . PTR ext, . int type, . int class, . int indaux, . int numaux, . PTR in)); . . void (*_bfd_coff_swap_sym_in) PARAMS (( . bfd *abfd , . PTR ext, . PTR in)); . . void (*_bfd_coff_swap_lineno_in) PARAMS (( . bfd *abfd, . PTR ext, . PTR in)); . Special entry points for gas to swap out coff parts: . unsigned int (*_bfd_coff_swap_aux_out) PARAMS (( . bfd *abfd, . PTR in, . int type, . int class, . int indaux, . int numaux, . PTR ext)); . . unsigned int (*_bfd_coff_swap_sym_out) PARAMS (( . bfd *abfd, . PTR in, . PTR ext)); . . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS (( . bfd *abfd, . PTR in, . PTR ext)); . . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS (( . bfd *abfd, . PTR src, . PTR dst)); . . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS (( . bfd *abfd, . PTR in, . PTR out)); . . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS (( . bfd *abfd, . PTR in, . PTR out)); . . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS (( . bfd *abfd, . PTR in, . PTR out)); . Special entry points for generic COFF routines to call target dependent COFF routines: . unsigned int _bfd_filhsz; . unsigned int _bfd_aoutsz; . unsigned int _bfd_scnhsz; . unsigned int _bfd_symesz; . unsigned int _bfd_auxesz; . unsigned int _bfd_relsz; . unsigned int _bfd_linesz; . boolean _bfd_coff_long_filenames; . boolean _bfd_coff_long_section_names; . void (*_bfd_coff_swap_filehdr_in) PARAMS (( . bfd *abfd, . PTR ext, . PTR in)); . void (*_bfd_coff_swap_aouthdr_in) PARAMS (( . bfd *abfd, . PTR ext, . PTR in)); . void (*_bfd_coff_swap_scnhdr_in) PARAMS (( . bfd *abfd, . PTR ext, . PTR in)); . void (*_bfd_coff_swap_reloc_in) PARAMS (( . bfd *abfd, . PTR ext, . PTR in)); . boolean (*_bfd_coff_bad_format_hook) PARAMS (( . bfd *abfd, . PTR internal_filehdr)); . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS (( . bfd *abfd, . PTR internal_filehdr)); . PTR (*_bfd_coff_mkobject_hook) PARAMS (( . bfd *abfd, . PTR internal_filehdr, . PTR internal_aouthdr)); . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS (( . bfd *abfd, . PTR internal_scnhdr, . const char *name)); . void (*_bfd_set_alignment_hook) PARAMS (( . bfd *abfd, . asection *sec, . PTR internal_scnhdr)); . boolean (*_bfd_coff_slurp_symbol_table) PARAMS (( . bfd *abfd)); . boolean (*_bfd_coff_symname_in_debug) PARAMS (( . bfd *abfd, . struct internal_syment *sym)); . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS (( . bfd *abfd, . combined_entry_type *table_base, . combined_entry_type *symbol, . unsigned int indaux, . combined_entry_type *aux)); . boolean (*_bfd_coff_print_aux) PARAMS (( . bfd *abfd, . FILE *file, . combined_entry_type *table_base, . combined_entry_type *symbol, . combined_entry_type *aux, . unsigned int indaux)); . void (*_bfd_coff_reloc16_extra_cases) PARAMS (( . bfd *abfd, . struct bfd_link_info *link_info, . struct bfd_link_order *link_order, . arelent *reloc, . bfd_byte *data, . unsigned int *src_ptr, . unsigned int *dst_ptr)); . int (*_bfd_coff_reloc16_estimate) PARAMS (( . bfd *abfd, . asection *input_section, . arelent *r, . unsigned int shrink, . struct bfd_link_info *link_info)); . boolean (*_bfd_coff_sym_is_global) PARAMS (( . bfd *abfd, . struct internal_syment *)); . void (*_bfd_coff_compute_section_file_positions) PARAMS (( . bfd *abfd)); . boolean (*_bfd_coff_start_final_link) PARAMS (( . bfd *output_bfd, . struct bfd_link_info *info)); . boolean (*_bfd_coff_relocate_section) PARAMS (( . bfd *output_bfd, . struct bfd_link_info *info, . bfd *input_bfd, . asection *input_section, . bfd_byte *contents, . struct internal_reloc *relocs, . struct internal_syment *syms, . asection **sections)); . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS (( . bfd *abfd, . asection *sec, . struct internal_reloc *rel, . struct coff_link_hash_entry *h, . struct internal_syment *sym, . bfd_vma *addendp)); . boolean (*_bfd_coff_adjust_symndx) PARAMS (( . bfd *obfd, . struct bfd_link_info *info, . bfd *ibfd, . asection *sec, . struct internal_reloc *reloc, . boolean *adjustedp)); . boolean (*_bfd_coff_link_add_one_symbol) PARAMS (( . struct bfd_link_info *info, . bfd *abfd, . const char *name, . flagword flags, . asection *section, . bfd_vma value, . const char *string, . boolean copy, . boolean collect, . struct bfd_link_hash_entry **hashp)); . .} bfd_coff_backend_data; . .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data) . .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \ . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i)) . .#define bfd_coff_swap_sym_in(a,e,i) \ . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i)) . .#define bfd_coff_swap_lineno_in(a,e,i) \ . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i)) . .#define bfd_coff_swap_reloc_out(abfd, i, o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o)) . .#define bfd_coff_swap_lineno_out(abfd, i, o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o)) . .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \ . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o)) . .#define bfd_coff_swap_sym_out(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o)) . .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o)) . .#define bfd_coff_swap_filehdr_out(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o)) . .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o)) . .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz) .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz) .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz) .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz) .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz) .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz) .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz) .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames) .#define bfd_coff_long_section_names(abfd) \ . (coff_backend_info (abfd)->_bfd_coff_long_section_names) .#define bfd_coff_swap_filehdr_in(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o)) . .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o)) . .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o)) . .#define bfd_coff_swap_reloc_in(abfd, i, o) \ . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o)) . .#define bfd_coff_bad_format_hook(abfd, filehdr) \ . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr)) . .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\ . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr)) .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\ . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr)) . .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\ . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name)) . .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\ . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr)) . .#define bfd_coff_slurp_symbol_table(abfd)\ . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd)) . .#define bfd_coff_symname_in_debug(abfd, sym)\ . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym)) . .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\ . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\ . (abfd, file, base, symbol, aux, indaux)) . .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\ . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\ . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)) . .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\ . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\ . (abfd, section, reloc, shrink, link_info)) . .#define bfd_coff_sym_is_global(abfd, sym)\ . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\ . (abfd, sym)) . .#define bfd_coff_compute_section_file_positions(abfd)\ . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\ . (abfd)) . .#define bfd_coff_start_final_link(obfd, info)\ . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\ . (obfd, info)) .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\ . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\ . (obfd, info, ibfd, o, con, rel, isyms, secs)) .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\ . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\ . (abfd, sec, rel, h, sym, addendp)) .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\ . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\ . (obfd, info, ibfd, sec, rel, adjustedp)) .#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\ . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\ . (info, abfd, name, flags, section, value, string, cp, coll, hashp)) . */ /* See whether the magic number matches. */ static boolean coff_bad_format_hook (abfd, filehdr) bfd * abfd; PTR filehdr; { struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; if (BADMAG (*internal_f)) return false; /* 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 */ #if defined(M88) || defined(I960) if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr) return false; #endif return true; } /* initialize a section structure with information peculiar to this particular implementation of coff */ static boolean coff_new_section_hook (abfd, section) bfd * abfd; asection * section; { section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER; #ifdef RS6000COFF_C if (xcoff_data (abfd)->text_align_power != 0 && strcmp (bfd_get_section_name (abfd, section), ".text") == 0) section->alignment_power = xcoff_data (abfd)->text_align_power; if (xcoff_data (abfd)->data_align_power != 0 && strcmp (bfd_get_section_name (abfd, section), ".data") == 0) section->alignment_power = xcoff_data (abfd)->data_align_power; #endif /* Allocate aux records for section symbols, to store size and related info. @@ The 10 is a guess at a plausible maximum number of aux entries (but shouldn't be a constant). */ coffsymbol (section->symbol)->native = (combined_entry_type *) bfd_zalloc (abfd, sizeof (combined_entry_type) * 10); /* The .stab section must be aligned to 2**2 at most, because otherwise there may be gaps in the section which gdb will not know how to interpret. Examining the section name is a hack, but that is also how gdb locates the section. We need to handle the .ctors and .dtors sections similarly, to avoid introducing null words in the tables. */ if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2 && (strncmp (section->name, ".stab", 5) == 0 || strcmp (section->name, ".ctors") == 0 || strcmp (section->name, ".dtors") == 0)) section->alignment_power = 2; /* Similarly, the .stabstr section must be aligned to 2**0 at most. */ if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 0 && strncmp (section->name, ".stabstr", 8) == 0) section->alignment_power = 0; return true; } #ifdef I960 /* Set the alignment of a BFD section. */ static void coff_set_alignment_hook (abfd, section, scnhdr) bfd * abfd; asection * section; PTR scnhdr; { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; unsigned int i; for (i = 0; i < 32; i++) if ((1 << i) >= hdr->s_align) break; section->alignment_power = i; } #else /* ! I960 */ #ifdef COFF_WITH_PE /* a couple of macros to help setting the alignment power field */ #define ALIGN_SET(field,x,y) \ if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\ {\ section->alignment_power = y;\ } #define ELIFALIGN_SET(field,x,y) \ else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \ {\ section->alignment_power = y;\ } static void coff_set_alignment_hook (abfd, section, scnhdr) bfd * abfd; asection * section; PTR scnhdr; { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; ALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_64BYTES, 6) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_32BYTES, 5) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_16BYTES, 4) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_8BYTES, 3) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_4BYTES, 2) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_2BYTES, 1) ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_1BYTES, 0) #ifdef POWERPC_LE_PE if (strcmp (section->name, ".idata$2") == 0) { section->alignment_power = 0; } else if (strcmp (section->name, ".idata$3") == 0) { section->alignment_power = 0; } else if (strcmp (section->name, ".idata$4") == 0) { section->alignment_power = 2; } else if (strcmp (section->name, ".idata$5") == 0) { section->alignment_power = 2; } else if (strcmp (section->name, ".idata$6") == 0) { section->alignment_power = 1; } else if (strcmp (section->name, ".reloc") == 0) { section->alignment_power = 1; } else if (strncmp (section->name, ".stab", 5) == 0) { section->alignment_power = 2; } #endif #ifdef COFF_IMAGE_WITH_PE /* In a PE image file, the s_paddr field holds the virtual size of a section, while the s_size field holds the raw size. */ if (hdr->s_paddr != 0) { if (coff_section_data (abfd, section) == NULL) { section->used_by_bfd = (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); if (section->used_by_bfd == NULL) { /* FIXME: Return error. */ abort (); } } if (pei_section_data (abfd, section) == NULL) { coff_section_data (abfd, section)->tdata = (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata)); if (coff_section_data (abfd, section)->tdata == NULL) { /* FIXME: Return error. */ abort (); } } pei_section_data (abfd, section)->virt_size = hdr->s_paddr; } #endif } #undef ALIGN_SET #undef ELIFALIGN_SET #else /* ! COFF_WITH_PE */ #ifdef RS6000COFF_C /* We grossly abuse this function to handle XCOFF overflow headers. When we see one, we correct the reloc and line number counts in the real header, and remove the section we just created. */ static void coff_set_alignment_hook (abfd, section, scnhdr) bfd *abfd; asection *section; PTR scnhdr; { struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr; asection *real_sec; asection **ps; if ((hdr->s_flags & STYP_OVRFLO) == 0) return; real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc); if (real_sec == NULL) return; real_sec->reloc_count = hdr->s_paddr; real_sec->lineno_count = hdr->s_vaddr; for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next) { if (*ps == section) { *ps = (*ps)->next; --abfd->section_count; break; } } } #else /* ! RS6000COFF_C */ #define coff_set_alignment_hook \ ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void) #endif /* ! RS6000COFF_C */ #endif /* ! COFF_WITH_PE */ #endif /* ! I960 */ #ifndef coff_mkobject static boolean coff_mkobject (abfd) bfd * abfd; { coff_data_type *coff; abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type)); if (abfd->tdata.coff_obj_data == 0) return false; coff = coff_data (abfd); coff->symbols = (coff_symbol_type *) NULL; coff->conversion_table = (unsigned int *) NULL; coff->raw_syments = (struct coff_ptr_struct *) NULL; coff->relocbase = 0; coff->local_toc_sym_map = 0; /* make_abs_section(abfd);*/ return true; } #endif /* Create the COFF backend specific information. */ #ifndef coff_mkobject_hook static PTR coff_mkobject_hook (abfd, filehdr, aouthdr) bfd * abfd; PTR filehdr; PTR aouthdr; { struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; coff_data_type *coff; if (coff_mkobject (abfd) == false) return NULL; coff = coff_data (abfd); coff->sym_filepos = internal_f->f_symptr; /* These members communicate important constants about the symbol table to GDB's symbol-reading code. These `constants' unfortunately vary among coff implementations... */ coff->local_n_btmask = N_BTMASK; coff->local_n_btshft = N_BTSHFT; coff->local_n_tmask = N_TMASK; coff->local_n_tshift = N_TSHIFT; coff->local_symesz = SYMESZ; coff->local_auxesz = AUXESZ; coff->local_linesz = LINESZ; obj_raw_syment_count (abfd) = obj_conv_table_size (abfd) = internal_f->f_nsyms; #ifdef RS6000COFF_C if ((internal_f->f_flags & F_SHROBJ) != 0) abfd->flags |= DYNAMIC; if (aouthdr != NULL && internal_f->f_opthdr >= AOUTSZ) { struct internal_aouthdr *internal_a = (struct internal_aouthdr *) aouthdr; struct xcoff_tdata *xcoff; xcoff = xcoff_data (abfd); xcoff->full_aouthdr = true; xcoff->toc = internal_a->o_toc; xcoff->sntoc = internal_a->o_sntoc; xcoff->snentry = internal_a->o_snentry; xcoff->text_align_power = internal_a->o_algntext; xcoff->data_align_power = internal_a->o_algndata; xcoff->modtype = internal_a->o_modtype; xcoff->cputype = internal_a->o_cputype; xcoff->maxdata = internal_a->o_maxdata; xcoff->maxstack = internal_a->o_maxstack; } #endif return (PTR) coff; } #endif /* Determine the machine architecture and type. FIXME: This is target dependent because the magic numbers are defined in the target dependent header files. But there is no particular need for this. If the magic numbers were moved to a separate file, this function would be target independent and would also be much more successful at linking together COFF files for different architectures. */ static boolean coff_set_arch_mach_hook (abfd, filehdr) bfd *abfd; PTR filehdr; { long machine; enum bfd_architecture arch; struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; machine = 0; switch (internal_f->f_magic) { #ifdef PPCMAGIC case PPCMAGIC: arch = bfd_arch_powerpc; machine = 0; /* what does this mean? (krk) */ break; #endif #ifdef I386MAGIC case I386MAGIC: case I386PTXMAGIC: case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */ case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */ arch = bfd_arch_i386; machine = 0; break; #endif #ifdef A29K_MAGIC_BIG case A29K_MAGIC_BIG: case A29K_MAGIC_LITTLE: arch = bfd_arch_a29k; machine = 0; break; #endif #ifdef ARMMAGIC case ARMMAGIC: arch = bfd_arch_arm; machine =0; break; #endif #ifdef MC68MAGIC case MC68MAGIC: case M68MAGIC: #ifdef MC68KBCSMAGIC case MC68KBCSMAGIC: #endif #ifdef APOLLOM68KMAGIC case APOLLOM68KMAGIC: #endif #ifdef LYNXCOFFMAGIC case LYNXCOFFMAGIC: #endif arch = bfd_arch_m68k; machine = 68020; break; #endif #ifdef MC88MAGIC case MC88MAGIC: case MC88DMAGIC: case MC88OMAGIC: arch = bfd_arch_m88k; machine = 88100; break; #endif #ifdef Z8KMAGIC case Z8KMAGIC: arch = bfd_arch_z8k; switch (internal_f->f_flags & F_MACHMASK) { case F_Z8001: machine = bfd_mach_z8001; break; case F_Z8002: machine = bfd_mach_z8002; break; default: return false; } break; #endif #ifdef I860 case I860MAGIC: arch = bfd_arch_i860; break; #endif #ifdef I960 #ifdef I960ROMAGIC case I960ROMAGIC: case I960RWMAGIC: arch = bfd_arch_i960; switch (F_I960TYPE & internal_f->f_flags) { default: case F_I960CORE: machine = bfd_mach_i960_core; break; case F_I960KB: machine = bfd_mach_i960_kb_sb; break; case F_I960MC: machine = bfd_mach_i960_mc; break; case F_I960XA: machine = bfd_mach_i960_xa; break; case F_I960CA: machine = bfd_mach_i960_ca; break; case F_I960KA: machine = bfd_mach_i960_ka_sa; break; case F_I960JX: machine = bfd_mach_i960_jx; break; case F_I960HX: machine = bfd_mach_i960_hx; break; } break; #endif #endif #ifdef RS6000COFF_C case U802ROMAGIC: case U802WRMAGIC: case U802TOCMAGIC: { int cputype; if (xcoff_data (abfd)->cputype != -1) cputype = xcoff_data (abfd)->cputype & 0xff; else { /* We did not get a value from the a.out header. If the file has not been stripped, we may be able to get the architecture information from the first symbol, if it is a .file symbol. */ if (obj_raw_syment_count (abfd) == 0) cputype = 0; else { bfd_byte buf[SYMESZ]; struct internal_syment sym; if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 || bfd_read (buf, 1, SYMESZ, abfd) != SYMESZ) return false; coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym); if (sym.n_sclass == C_FILE) cputype = sym.n_type & 0xff; else cputype = 0; } } /* FIXME: We don't handle all cases here. */ switch (cputype) { default: case 0: #ifdef POWERMAC /* PowerPC Macs use the same magic numbers as RS/6000 (because that's how they were bootstrapped originally), but they are always PowerPC architecture. */ arch = bfd_arch_powerpc; machine = 0; #else arch = bfd_arch_rs6000; machine = 6000; #endif /* POWERMAC */ break; case 1: arch = bfd_arch_powerpc; machine = 601; break; case 2: /* 64 bit PowerPC */ arch = bfd_arch_powerpc; machine = 620; break; case 3: arch = bfd_arch_powerpc; machine = 0; break; case 4: arch = bfd_arch_rs6000; machine = 6000; break; } } break; #endif #ifdef WE32KMAGIC case WE32KMAGIC: arch = bfd_arch_we32k; machine = 0; break; #endif #ifdef H8300MAGIC case H8300MAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300; /* !! FIXME this probably isn't the right place for this */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef H8300HMAGIC case H8300HMAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300h; /* !! FIXME this probably isn't the right place for this */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef H8300SMAGIC case H8300SMAGIC: arch = bfd_arch_h8300; machine = bfd_mach_h8300s; /* !! FIXME this probably isn't the right place for this */ abfd->flags |= BFD_IS_RELAXABLE; break; #endif #ifdef SH_ARCH_MAGIC_BIG case SH_ARCH_MAGIC_BIG: case SH_ARCH_MAGIC_LITTLE: arch = bfd_arch_sh; machine = 0; break; #endif #ifdef H8500MAGIC case H8500MAGIC: arch = bfd_arch_h8500; machine = 0; break; #endif #ifdef SPARCMAGIC case SPARCMAGIC: #ifdef LYNXCOFFMAGIC case LYNXCOFFMAGIC: #endif arch = bfd_arch_sparc; machine = 0; break; #endif default: /* Unreadable input file type */ arch = bfd_arch_obscure; break; } bfd_default_set_arch_mach (abfd, arch, machine); return true; } #ifdef SYMNAME_IN_DEBUG static boolean symname_in_debug_hook (abfd, sym) bfd * abfd; struct internal_syment *sym; { return SYMNAME_IN_DEBUG (sym) ? true : false; } #else #define symname_in_debug_hook \ (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false #endif #ifdef RS6000COFF_C /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */ static boolean coff_pointerize_aux_hook PARAMS ((bfd *, combined_entry_type *, combined_entry_type *, unsigned int, combined_entry_type *)); /*ARGSUSED*/ static boolean coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux) bfd *abfd; combined_entry_type *table_base; combined_entry_type *symbol; unsigned int indaux; combined_entry_type *aux; { int class = symbol->u.syment.n_sclass; if ((class == C_EXT || class == C_HIDEXT) && indaux + 1 == symbol->u.syment.n_numaux) { if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD) { aux->u.auxent.x_csect.x_scnlen.p = table_base + aux->u.auxent.x_csect.x_scnlen.l; aux->fix_scnlen = 1; } /* Return true to indicate that the caller should not do any further work on this auxent. */ return true; } /* Return false to indicate that this auxent should be handled by the caller. */ return false; } #else #ifdef I960 /* We don't want to pointerize bal entries. */ static boolean coff_pointerize_aux_hook PARAMS ((bfd *, combined_entry_type *, combined_entry_type *, unsigned int, combined_entry_type *)); /*ARGSUSED*/ static boolean coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux) bfd *abfd; combined_entry_type *table_base; combined_entry_type *symbol; unsigned int indaux; combined_entry_type *aux; { /* Return true if we don't want to pointerize this aux entry, which is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */ return (indaux == 1 && (symbol->u.syment.n_sclass == C_LEAFPROC || symbol->u.syment.n_sclass == C_LEAFSTAT || symbol->u.syment.n_sclass == C_LEAFEXT)); } #else /* ! I960 */ #define coff_pointerize_aux_hook 0 #endif /* ! I960 */ #endif /* ! RS6000COFF_C */ /* Print an aux entry. This returns true if it has printed it. */ static boolean coff_print_aux PARAMS ((bfd *, FILE *, combined_entry_type *, combined_entry_type *, combined_entry_type *, unsigned int)); static boolean coff_print_aux (abfd, file, table_base, symbol, aux, indaux) bfd *abfd; FILE *file; combined_entry_type *table_base; combined_entry_type *symbol; combined_entry_type *aux; unsigned int indaux; { #ifdef RS6000COFF_C if ((symbol->u.syment.n_sclass == C_EXT || symbol->u.syment.n_sclass == C_HIDEXT) && indaux + 1 == symbol->u.syment.n_numaux) { /* This is a csect entry. */ fprintf (file, "AUX "); if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD) { BFD_ASSERT (! aux->fix_scnlen); fprintf (file, "val %5ld", aux->u.auxent.x_csect.x_scnlen.l); } else { fprintf (file, "indx "); if (! aux->fix_scnlen) fprintf (file, "%4ld", aux->u.auxent.x_csect.x_scnlen.l); else fprintf (file, "%4ld", (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base)); } fprintf (file, " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u", aux->u.auxent.x_csect.x_parmhash, (unsigned int) aux->u.auxent.x_csect.x_snhash, SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp), SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp), (unsigned int) aux->u.auxent.x_csect.x_smclas, aux->u.auxent.x_csect.x_stab, (unsigned int) aux->u.auxent.x_csect.x_snstab); return true; } #endif /* Return false to indicate that no special action was taken. */ return false; } /* SUBSUBSECTION Writing relocations To write relocations, the back end steps 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; 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. */ #ifdef TARG_AUX static int compare_arelent_ptr PARAMS ((const PTR, const PTR)); /* AUX's ld wants relocations to be sorted */ static int compare_arelent_ptr (x, y) const PTR x; const PTR y; { const arelent **a = (const arelent **) x; const arelent **b = (const arelent **) y; bfd_size_type aadr = (*a)->address; bfd_size_type badr = (*b)->address; return (aadr < badr ? -1 : badr < aadr ? 1 : 0); } #endif /* TARG_AUX */ static boolean coff_write_relocs (abfd, first_undef) bfd * abfd; int first_undef; { asection *s; for (s = abfd->sections; s != (asection *) NULL; s = s->next) { unsigned int i; struct external_reloc dst; arelent **p; #ifndef TARG_AUX p = s->orelocation; #else /* sort relocations before we write them out */ p = (arelent **) bfd_malloc (s->reloc_count * sizeof (arelent *)); if (p == NULL && s->reloc_count > 0) return false; memcpy (p, s->orelocation, s->reloc_count * sizeof (arelent *)); qsort (p, s->reloc_count, sizeof (arelent *), compare_arelent_ptr); #endif if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0) return false; for (i = 0; i < s->reloc_count; i++) { struct internal_reloc n; arelent *q = p[i]; memset ((PTR) & n, 0, sizeof (n)); /* Now we've renumbered the symbols we know where the undefined symbols live in the table. Check the reloc entries for symbols who's output bfd isn't the right one. This is because the symbol was undefined (which means that all the pointers are never made to point to the same place). This is a bad thing,'cause the symbols attached to the output bfd are indexed, so that the relocation entries know which symbol index they point to. So we have to look up the output symbol here. */ if (q->sym_ptr_ptr[0]->the_bfd != abfd) { int i; const char *sname = q->sym_ptr_ptr[0]->name; asymbol **outsyms = abfd->outsymbols; for (i = first_undef; outsyms[i]; i++) { const char *intable = outsyms[i]->name; if (strcmp (intable, sname) == 0) { /* got a hit, so repoint the reloc */ q->sym_ptr_ptr = outsyms + i; break; } } } n.r_vaddr = q->address + s->vma; #ifdef R_IHCONST /* The 29k const/consth reloc pair is a real kludge. The consth part doesn't have a symbol; it has an offset. So rebuilt that here. */ if (q->howto->type == R_IHCONST) n.r_symndx = q->addend; else #endif if (q->sym_ptr_ptr) { if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr) /* This is a relocation relative to the absolute symbol. */ n.r_symndx = -1; else { n.r_symndx = get_index ((*(q->sym_ptr_ptr))); /* Take notice if the symbol reloc points to a symbol we don't have in our symbol table. What should we do for this?? */ if (n.r_symndx > obj_conv_table_size (abfd)) abort (); } } #ifdef SWAP_OUT_RELOC_OFFSET n.r_offset = q->addend; #endif #ifdef SELECT_RELOC /* Work out reloc type from what is required */ SELECT_RELOC (n, q->howto); #else n.r_type = q->howto->type; #endif coff_swap_reloc_out (abfd, &n, &dst); if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ) return false; } #ifdef TARG_AUX if (p != NULL) free (p); #endif } return true; } /* 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 coff_set_flags (abfd, magicp, flagsp) bfd * abfd; unsigned *magicp; unsigned short *flagsp; { switch (bfd_get_arch (abfd)) { #ifdef Z8KMAGIC case bfd_arch_z8k: *magicp = Z8KMAGIC; switch (bfd_get_mach (abfd)) { case bfd_mach_z8001: *flagsp = F_Z8001; break; case bfd_mach_z8002: *flagsp = F_Z8002; break; default: return false; } return true; #endif #ifdef I960ROMAGIC case bfd_arch_i960: { unsigned flags; *magicp = I960ROMAGIC; /* ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC : I960RWMAGIC); FIXME??? */ switch (bfd_get_mach (abfd)) { 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; case bfd_mach_i960_jx: flags = F_I960JX; break; case bfd_mach_i960_hx: flags = F_I960HX; break; default: return false; } *flagsp = flags; return true; } break; #endif #ifdef ARMMAGIC case bfd_arch_arm: *magicp = ARMMAGIC; return true; #endif #ifdef PPCMAGIC case bfd_arch_powerpc: *magicp = PPCMAGIC; return true; break; #endif #ifdef I386MAGIC case bfd_arch_i386: *magicp = I386MAGIC; #ifdef LYNXOS /* Just overwrite the usual value if we're doing Lynx. */ *magicp = LYNXCOFFMAGIC; #endif return true; break; #endif #ifdef I860MAGIC case bfd_arch_i860: *magicp = I860MAGIC; return true; break; #endif #ifdef MC68MAGIC case bfd_arch_m68k: #ifdef APOLLOM68KMAGIC *magicp = APOLLO_COFF_VERSION_NUMBER; #else *magicp = MC68MAGIC; #endif #ifdef LYNXOS /* Just overwrite the usual value if we're doing Lynx. */ *magicp = LYNXCOFFMAGIC; #endif return true; break; #endif #ifdef MC88MAGIC case bfd_arch_m88k: *magicp = MC88OMAGIC; return true; break; #endif #ifdef H8300MAGIC case bfd_arch_h8300: switch (bfd_get_mach (abfd)) { case bfd_mach_h8300: *magicp = H8300MAGIC; return true; case bfd_mach_h8300h: *magicp = H8300HMAGIC; return true; case bfd_mach_h8300s: *magicp = H8300SMAGIC; return true; } break; #endif #ifdef SH_ARCH_MAGIC_BIG case bfd_arch_sh: if (bfd_big_endian (abfd)) *magicp = SH_ARCH_MAGIC_BIG; else *magicp = SH_ARCH_MAGIC_LITTLE; return true; break; #endif #ifdef SPARCMAGIC case bfd_arch_sparc: *magicp = SPARCMAGIC; #ifdef LYNXOS /* Just overwrite the usual value if we're doing Lynx. */ *magicp = LYNXCOFFMAGIC; #endif return true; break; #endif #ifdef H8500MAGIC case bfd_arch_h8500: *magicp = H8500MAGIC; return true; break; #endif #ifdef A29K_MAGIC_BIG case bfd_arch_a29k: if (bfd_big_endian (abfd)) *magicp = A29K_MAGIC_BIG; else *magicp = A29K_MAGIC_LITTLE; return true; break; #endif #ifdef WE32KMAGIC case bfd_arch_we32k: *magicp = WE32KMAGIC; return true; break; #endif #ifdef U802TOCMAGIC case bfd_arch_rs6000: #ifndef PPCMAGIC case bfd_arch_powerpc: #endif *magicp = U802TOCMAGIC; return true; break; #endif default: /* Unknown architecture */ /* return false; -- fall through to "return false" below, to avoid "statement never reached" errors on the one below. */ break; } return false; } static boolean coff_set_arch_mach (abfd, arch, machine) bfd * abfd; enum bfd_architecture arch; unsigned long machine; { unsigned dummy1; unsigned short dummy2; if (! bfd_default_set_arch_mach (abfd, arch, machine)) return false; 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 coff_compute_section_file_positions (abfd) bfd * abfd; { asection *current; asection *previous = (asection *) NULL; file_ptr sofar = FILHSZ; #ifndef I960 file_ptr old_sofar; #endif unsigned int count; #ifdef RS6000COFF_C /* On XCOFF, if we have symbols, set up the .debug section. */ if (bfd_get_symcount (abfd) > 0) { bfd_size_type sz; bfd_size_type i, symcount; asymbol **symp; sz = 0; symcount = bfd_get_symcount (abfd); for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++) { coff_symbol_type *cf; cf = coff_symbol_from (abfd, *symp); if (cf != NULL && cf->native != NULL && SYMNAME_IN_DEBUG (&cf->native->u.syment)) { size_t len; len = strlen (bfd_asymbol_name (*symp)); if (len > SYMNMLEN) sz += len + 3; } } if (sz > 0) { asection *dsec; dsec = bfd_make_section_old_way (abfd, ".debug"); if (dsec == NULL) abort (); dsec->_raw_size = sz; dsec->flags |= SEC_HAS_CONTENTS; } } #endif #ifdef COFF_IMAGE_WITH_PE int page_size; if (coff_data (abfd)->link_info) { page_size = pe_data (abfd)->pe_opthdr.FileAlignment; } else page_size = PE_DEF_FILE_ALIGNMENT; #else #ifdef COFF_PAGE_SIZE int page_size = COFF_PAGE_SIZE; #endif #endif 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; #ifdef RS6000COFF_C else if (xcoff_data (abfd)->full_aouthdr) sofar += AOUTSZ; else sofar += SMALL_AOUTSZ; #endif sofar += abfd->section_count * SCNHSZ; #ifdef RS6000COFF_C /* XCOFF handles overflows in the reloc and line number count fields by allocating a new section header to hold the correct counts. */ for (current = abfd->sections; current != NULL; current = current->next) if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) sofar += SCNHSZ; #endif for (current = abfd->sections, count = 1; current != (asection *) NULL; current = current->next, ++count) { current->target_index = count; /* 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 if ((abfd->flags & EXEC_P) != 0) { /* make sure this section is aligned on the right boundary - by padding the previous section up if necessary */ old_sofar = sofar; sofar = BFD_ALIGN (sofar, 1 << current->alignment_power); if (previous != (asection *) NULL) { previous->_raw_size += sofar - old_sofar; } } #endif /* In demand paged files the low order bits of the file offset must match the low order bits of the virtual address. */ #ifdef COFF_PAGE_SIZE if ((abfd->flags & D_PAGED) != 0 && (current->flags & SEC_ALLOC) != 0) sofar += (current->vma - sofar) % page_size; #endif current->filepos = sofar; #ifdef COFF_IMAGE_WITH_PE /* With PE we have to pad each section to be a multiple of its page size too, and remember both sizes. */ if (coff_section_data (abfd, current) == NULL) { current->used_by_bfd = (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); if (current->used_by_bfd == NULL) { /* FIXME: Return error. */ abort (); } } if (pei_section_data (abfd, current) == NULL) { coff_section_data (abfd, current)->tdata = (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata)); if (coff_section_data (abfd, current)->tdata == NULL) { /* FIXME: Return error. */ abort (); } } if (pei_section_data (abfd, current)->virt_size == 0) pei_section_data (abfd, current)->virt_size = current->_raw_size; current->_raw_size = (current->_raw_size + page_size -1) & -page_size; #endif sofar += current->_raw_size; #ifndef I960 /* make sure that this section is of the right size too */ if ((abfd->flags & EXEC_P) == 0) current->_raw_size = BFD_ALIGN (current->_raw_size, 1 << current->alignment_power); else { old_sofar = sofar; sofar = BFD_ALIGN (sofar, 1 << current->alignment_power); current->_raw_size += sofar - old_sofar; } #endif #ifdef _LIB /* Force .lib sections to start at zero. The vma is then incremented in coff_set_section_contents. This is right for SVR3.2. */ if (strcmp (current->name, _LIB) == 0) bfd_set_section_vma (abfd, current, 0); #endif previous = current; } obj_relocbase (abfd) = sofar; abfd->output_has_begun = true; } #if 0 /* This can never work, because it is called too late--after the section positions have been set. I can't figure out what it is for, so I am going to disable it--Ian Taylor 20 March 1996. */ /* If .file, .text, .data, .bss symbols are missing, add them. */ /* @@ Should we only be adding missing symbols, or overriding the aux values for existing section symbols? */ static boolean coff_add_missing_symbols (abfd) bfd *abfd; { unsigned int nsyms = bfd_get_symcount (abfd); asymbol **sympp = abfd->outsymbols; asymbol **sympp2; unsigned int i; int need_text = 1, need_data = 1, need_bss = 1, need_file = 1; for (i = 0; i < nsyms; i++) { coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]); CONST char *name; if (csym) { /* only do this if there is a coff representation of the input symbol */ if (csym->native && csym->native->u.syment.n_sclass == C_FILE) { need_file = 0; continue; } name = csym->symbol.name; if (!name) continue; if (!strcmp (name, _TEXT)) need_text = 0; #ifdef APOLLO_M68 else if (!strcmp (name, ".wtext")) need_text = 0; #endif else if (!strcmp (name, _DATA)) need_data = 0; else if (!strcmp (name, _BSS)) need_bss = 0; } } /* Now i == bfd_get_symcount (abfd). */ /* @@ For now, don't deal with .file symbol. */ need_file = 0; if (!need_text && !need_data && !need_bss && !need_file) return true; nsyms += need_text + need_data + need_bss + need_file; sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *)); if (!sympp2) return false; memcpy (sympp2, sympp, i * sizeof (asymbol *)); if (need_file) { /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */ abort (); } if (need_text) sympp2[i++] = coff_section_symbol (abfd, _TEXT); if (need_data) sympp2[i++] = coff_section_symbol (abfd, _DATA); if (need_bss) sympp2[i++] = coff_section_symbol (abfd, _BSS); BFD_ASSERT (i == nsyms); bfd_set_symtab (abfd, sympp2, nsyms); return true; } #endif /* 0 */ /* SUPPRESS 558 */ /* SUPPRESS 529 */ static boolean coff_write_object_contents (abfd) bfd * abfd; { asection *current; boolean hasrelocs = false; boolean haslinno = false; file_ptr scn_base; file_ptr reloc_base; file_ptr lineno_base; file_ptr sym_base; unsigned long reloc_size = 0; unsigned long lnno_size = 0; boolean long_section_names; asection *text_sec = NULL; asection *data_sec = NULL; asection *bss_sec = NULL; struct internal_filehdr internal_f; struct internal_aouthdr internal_a; #ifdef COFF_LONG_SECTION_NAMES size_t string_size = STRING_SIZE_SIZE; #endif bfd_set_error (bfd_error_system_call); /* Make a pass through the symbol table to count line number entries and put them into the correct asections */ lnno_size = coff_count_linenumbers (abfd) * LINESZ; if (abfd->output_has_begun == false) coff_compute_section_file_positions (abfd); reloc_base = obj_relocbase (abfd); /* 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; 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 * RELSZ; } else { current->rel_filepos = 0; } } /* Write section headers to the file. */ internal_f.f_nscns = 0; if ((abfd->flags & EXEC_P) != 0) scn_base = FILHSZ + AOUTSZ; else { scn_base = FILHSZ; #ifdef RS6000COFF_C if (xcoff_data (abfd)->full_aouthdr) scn_base += AOUTSZ; else scn_base += SMALL_AOUTSZ; #endif } if (bfd_seek (abfd, scn_base, SEEK_SET) != 0) return false; long_section_names = false; for (current = abfd->sections; current != NULL; current = current->next) { struct internal_scnhdr section; #ifdef COFF_WITH_PE /* If we've got a .reloc section, remember. */ #ifdef COFF_IMAGE_WITH_PE if (strcmp (current->name, ".reloc") == 0) { pe_data (abfd)->has_reloc_section = 1; } #endif #endif internal_f.f_nscns++; strncpy (section.s_name, current->name, SCNNMLEN); #ifdef COFF_LONG_SECTION_NAMES /* Handle long section names as in PE. This must be compatible with the code in coff_write_symbols. */ { size_t len; len = strlen (current->name); if (len > SCNNMLEN) { memset (section.s_name, 0, SCNNMLEN); sprintf (section.s_name, "/%lu", (unsigned long) string_size); string_size += len + 1; long_section_names = true; } } #endif #ifdef _LIB /* Always set s_vaddr of .lib to 0. This is right for SVR3.2 Ian Taylor . */ if (strcmp (current->name, _LIB) == 0) section.s_vaddr = 0; else #endif section.s_vaddr = current->vma; section.s_paddr = current->lma; section.s_size = current->_raw_size; #ifdef COFF_WITH_PE section.s_paddr = 0; #endif #ifdef COFF_IMAGE_WITH_PE /* Reminder: s_paddr holds the virtual size of the section. */ if (coff_section_data (abfd, current) != NULL && pei_section_data (abfd, current) != NULL) section.s_paddr = pei_section_data (abfd, current)->virt_size; else section.s_paddr = 0; #endif /* If this section has no size or is unloadable then the scnptr will be 0 too */ if (current->_raw_size == 0 || (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 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; #ifdef RS6000COFF_C /* Indicate the use of an XCOFF overflow section header. */ if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) { section.s_nreloc = 0xffff; section.s_nlnno = 0xffff; } #endif section.s_flags = sec_to_styp_flags (current->name, current->flags); if (!strcmp (current->name, _TEXT)) { text_sec = current; } else if (!strcmp (current->name, _DATA)) { data_sec = current; } else if (!strcmp (current->name, _BSS)) { bss_sec = current; } #ifdef I960 section.s_align = (current->alignment_power ? 1 << current->alignment_power : 0); #endif #ifdef COFF_IMAGE_WITH_PE /* suppress output of the sections if they are null. ld includes the bss and data sections even if there is no size assigned to them. NT loader doesn't like it if these section headers are included if the sections themselves are not needed */ if (section.s_size == 0) internal_f.f_nscns--; else #endif { SCNHDR buff; if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ) return false; } #ifdef COFF_WITH_PE /* PE stores COMDAT section information in the symbol table. If this section is supposed to have some COMDAT info, track down the symbol in the symbol table and modify it. */ if ((current->flags & SEC_LINK_ONCE) != 0) { unsigned int i, count; asymbol **psym; coff_symbol_type *csym; count = bfd_get_symcount (abfd); for (i = 0, psym = abfd->outsymbols; i < count; i++, psym++) { /* Here *PSYM is the section symbol for CURRENT. */ if (strcmp ((*psym)->name, current->name) == 0) { csym = coff_symbol_from (abfd, *psym); if (csym == NULL || csym->native == NULL || csym->native->u.syment.n_numaux < 1 || csym->native->u.syment.n_sclass != C_STAT || csym->native->u.syment.n_type != T_NULL) continue; break; } } /* Did we find it? Note that we might not if we're converting the file from some other object file format. */ if (i < count) { combined_entry_type *aux; /* We don't touch the x_checksum field. The x_associated field is not currently supported. */ aux = csym->native + 1; switch (current->flags & SEC_LINK_DUPLICATES) { case SEC_LINK_DUPLICATES_DISCARD: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_ANY; break; case SEC_LINK_DUPLICATES_ONE_ONLY: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_NODUPLICATES; break; case SEC_LINK_DUPLICATES_SAME_SIZE: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_SAME_SIZE; break; case SEC_LINK_DUPLICATES_SAME_CONTENTS: aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_EXACT_MATCH; break; } } } #endif /* COFF_WITH_PE */ } #ifdef RS6000COFF_C /* XCOFF handles overflows in the reloc and line number count fields by creating a new section header to hold the correct values. */ for (current = abfd->sections; current != NULL; current = current->next) { if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff) { struct internal_scnhdr scnhdr; SCNHDR buff; internal_f.f_nscns++; strncpy (&(scnhdr.s_name[0]), current->name, 8); scnhdr.s_paddr = current->reloc_count; scnhdr.s_vaddr = current->lineno_count; scnhdr.s_size = 0; scnhdr.s_scnptr = 0; scnhdr.s_relptr = current->rel_filepos; scnhdr.s_lnnoptr = current->line_filepos; scnhdr.s_nreloc = current->target_index; scnhdr.s_nlnno = current->target_index; scnhdr.s_flags = STYP_OVRFLO; if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0 || bfd_write ((PTR) &buff, 1, SCNHSZ, abfd) != SCNHSZ) return false; } } #endif /* OK, now set up the filehdr... */ /* Don't include the internal abs section in the 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 */ internal_f.f_timdat = 0; internal_f.f_flags = 0; if (abfd->flags & EXEC_P) internal_f.f_opthdr = AOUTSZ; else { internal_f.f_opthdr = 0; #ifdef RS6000COFF_C if (xcoff_data (abfd)->full_aouthdr) internal_f.f_opthdr = AOUTSZ; else internal_f.f_opthdr = SMALL_AOUTSZ; #endif } if (!hasrelocs) internal_f.f_flags |= F_RELFLG; if (!haslinno) internal_f.f_flags |= F_LNNO; if (abfd->flags & EXEC_P) internal_f.f_flags |= F_EXEC; /* FIXME: this is wrong for PPC_PE! */ if (bfd_little_endian (abfd)) internal_f.f_flags |= F_AR32WR; else internal_f.f_flags |= F_AR32W; /* FIXME, should do something about the other byte orders and architectures. */ #ifdef RS6000COFF_C if ((abfd->flags & DYNAMIC) != 0) internal_f.f_flags |= F_SHROBJ; if (bfd_get_section_by_name (abfd, _LOADER) != NULL) internal_f.f_flags |= F_DYNLOAD; #endif memset (&internal_a, 0, sizeof internal_a); /* Set up architecture-dependent stuff */ { unsigned int magic = 0; unsigned short flags = 0; coff_set_flags (abfd, &magic, &flags); internal_f.f_magic = magic; internal_f.f_flags |= flags; /* ...and the "opt"hdr... */ #ifdef A29K #ifdef ULTRA3 /* NYU's machine */ /* FIXME: This is a bogus check. I really want to see if there * is a .shbss or a .shdata section, if so then set the magic * number to indicate a shared data executable. */ if (internal_f.f_nscns >= 7) internal_a.magic = SHMAGIC; /* Shared magic */ else #endif /* ULTRA3 */ internal_a.magic = NMAGIC; /* Assume separate i/d */ #define __A_MAGIC_SET__ #endif /* A29K */ #ifdef I860 /* FIXME: What are the a.out magic numbers for the i860? */ internal_a.magic = 0; #define __A_MAGIC_SET__ #endif /* I860 */ #ifdef I960 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC); #define __A_MAGIC_SET__ #endif /* I960 */ #if M88 #define __A_MAGIC_SET__ internal_a.magic = PAGEMAGICBCS; #endif /* M88 */ #if APOLLO_M68 #define __A_MAGIC_SET__ internal_a.magic = APOLLO_COFF_VERSION_NUMBER; #endif #if defined(M68) || defined(WE32K) || defined(M68K) #define __A_MAGIC_SET__ #if defined(LYNXOS) internal_a.magic = LYNXCOFFMAGIC; #else #if defined(TARG_AUX) internal_a.magic = (abfd->flags & D_PAGED ? PAGEMAGICPEXECPAGED : abfd->flags & WP_TEXT ? PAGEMAGICPEXECSWAPPED : PAGEMAGICEXECSWAPPED); #else #if defined (PAGEMAGICPEXECPAGED) internal_a.magic = PAGEMAGICPEXECPAGED; #endif #endif /* TARG_AUX */ #endif /* LYNXOS */ #endif /* M68 || WE32K || M68K */ #if defined(ARM) #define __A_MAGIC_SET__ internal_a.magic = ZMAGIC; #endif #if defined(PPC_PE) #define __A_MAGIC_SET__ internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC; #endif #if defined(I386) #define __A_MAGIC_SET__ #if defined(LYNXOS) internal_a.magic = LYNXCOFFMAGIC; #else /* LYNXOS */ internal_a.magic = ZMAGIC; #endif /* LYNXOS */ #endif /* I386 */ #if defined(SPARC) #define __A_MAGIC_SET__ #if defined(LYNXOS) internal_a.magic = LYNXCOFFMAGIC; #endif /* LYNXOS */ #endif /* SPARC */ #if RS6000COFF_C #define __A_MAGIC_SET__ internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC : (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC : RS6K_AOUTHDR_OMAGIC; #endif #ifndef __A_MAGIC_SET__ #include "Your aouthdr magic number is not being set!" #else #undef __A_MAGIC_SET__ #endif } /* FIXME: Does anybody ever set this to another value? */ internal_a.vstamp = 0; /* Now should write relocs, strings, syms */ obj_sym_filepos (abfd) = sym_base; if (bfd_get_symcount (abfd) != 0) { int firstundef; #if 0 if (!coff_add_missing_symbols (abfd)) return false; #endif if (!coff_renumber_symbols (abfd, &firstundef)) return false; coff_mangle_symbols (abfd); if (! coff_write_symbols (abfd)) return false; if (! coff_write_linenumbers (abfd)) return false; if (! coff_write_relocs (abfd, firstundef)) return false; } #ifdef COFF_IMAGE_WITH_PE #ifdef PPC_PE else if ((abfd->flags & EXEC_P) != 0) { bfd_byte b; /* PowerPC PE appears to require that all executable files be rounded up to the page size. */ b = 0; if (bfd_seek (abfd, BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1, SEEK_SET) != 0 || bfd_write (&b, 1, 1, abfd) != 1) return false; } #endif #endif /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF backend linker, and obj_raw_syment_count is not valid until after coff_write_symbols is called. */ if (obj_raw_syment_count (abfd) != 0) { internal_f.f_symptr = sym_base; #ifdef RS6000COFF_C /* AIX appears to require that F_RELFLG not be set if there are local symbols but no relocations. */ internal_f.f_flags &=~ F_RELFLG; #endif } else { if (long_section_names) internal_f.f_symptr = sym_base; else internal_f.f_symptr = 0; internal_f.f_flags |= F_LSYMS; } if (text_sec) { internal_a.tsize = bfd_get_section_size_before_reloc (text_sec); internal_a.text_start = internal_a.tsize ? text_sec->vma : 0; } if (data_sec) { internal_a.dsize = bfd_get_section_size_before_reloc (data_sec); internal_a.data_start = internal_a.dsize ? data_sec->vma : 0; } if (bss_sec) { internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec); if (internal_a.bsize && bss_sec->vma < internal_a.data_start) internal_a.data_start = bss_sec->vma; } internal_a.entry = bfd_get_start_address (abfd); internal_f.f_nsyms = obj_raw_syment_count (abfd); #ifdef RS6000COFF_C if (xcoff_data (abfd)->full_aouthdr) { bfd_vma toc; asection *loader_sec; internal_a.vstamp = 1; internal_a.o_snentry = xcoff_data (abfd)->snentry; if (internal_a.o_snentry == 0) internal_a.entry = (bfd_vma) -1; if (text_sec != NULL) { internal_a.o_sntext = text_sec->target_index; internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec); } else { internal_a.o_sntext = 0; internal_a.o_algntext = 0; } if (data_sec != NULL) { internal_a.o_sndata = data_sec->target_index; internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec); } else { internal_a.o_sndata = 0; internal_a.o_algndata = 0; } loader_sec = bfd_get_section_by_name (abfd, ".loader"); if (loader_sec != NULL) internal_a.o_snloader = loader_sec->target_index; else internal_a.o_snloader = 0; if (bss_sec != NULL) internal_a.o_snbss = bss_sec->target_index; else internal_a.o_snbss = 0; toc = xcoff_data (abfd)->toc; internal_a.o_toc = toc; internal_a.o_sntoc = xcoff_data (abfd)->sntoc; internal_a.o_modtype = xcoff_data (abfd)->modtype; if (xcoff_data (abfd)->cputype != -1) internal_a.o_cputype = xcoff_data (abfd)->cputype; else { switch (bfd_get_arch (abfd)) { case bfd_arch_rs6000: internal_a.o_cputype = 4; break; case bfd_arch_powerpc: if (bfd_get_mach (abfd) == 0) internal_a.o_cputype = 3; else internal_a.o_cputype = 1; break; default: abort (); } } internal_a.o_maxstack = xcoff_data (abfd)->maxstack; internal_a.o_maxdata = xcoff_data (abfd)->maxdata; } #endif /* now write them */ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return false; { char buff[FILHSZ]; coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) buff); if (bfd_write ((PTR) buff, 1, FILHSZ, abfd) != FILHSZ) return false; } if (abfd->flags & EXEC_P) { /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR. include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */ char buff[AOUTSZ]; coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) buff); if (bfd_write ((PTR) buff, 1, AOUTSZ, abfd) != AOUTSZ) return false; } #ifdef RS6000COFF_C else { AOUTHDR buff; size_t size; /* XCOFF seems to always write at least a small a.out header. */ coff_swap_aouthdr_out (abfd, (PTR) &internal_a, (PTR) &buff); if (xcoff_data (abfd)->full_aouthdr) size = AOUTSZ; else size = SMALL_AOUTSZ; if (bfd_write ((PTR) &buff, 1, size, abfd) != size) return false; } #endif return true; } static boolean coff_set_section_contents (abfd, section, location, offset, count) bfd * abfd; sec_ptr section; PTR location; file_ptr offset; bfd_size_type count; { if (abfd->output_has_begun == false) /* set by bfd.c handler */ coff_compute_section_file_positions (abfd); #if defined(_LIB) && !defined(TARG_AUX) /* The physical address field of a .lib section is used to hold the number of shared libraries in the section. This code counts the number of sections being written, and increments the lma field with the number. I have found no documentation on the contents of this section. Experimentation indicates that the section contains zero or more records, each of which has the following structure: - a (four byte) word holding the length of this record, in words, - a word that always seems to be set to "2", - the path to a shared library, null-terminated and then padded to a whole word boundary. bfd_assert calls have been added to alert if an attempt is made to write a section which doesn't follow these assumptions. The code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe (Thanks!). Gvran Uddeborg */ if (strcmp (section->name, _LIB) == 0) { bfd_byte *rec, *recend; rec = (bfd_byte *) location; recend = rec + count; while (rec < recend) { ++section->lma; rec += bfd_get_32 (abfd, rec) * 4; } BFD_ASSERT (rec == recend); } #endif /* Don't write out bss sections - one way to do this is to see if the filepos has not been set. */ if (section->filepos == 0) return true; if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0) return false; 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_set_error (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) return (NULL); if (bfd_seek (abfd, where, seek_direction) != 0 || bfd_read (area, 1, size, abfd) != size) return (NULL); return (area); } /* buy_and_read() */ /* SUBSUBSECTION Reading linenumbers Creating the linenumber table is done by reading in the entire coff linenumber table, and creating another table for internal use. A coff linenumber 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) 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_raw_syments (abfd))->u.syment._n._n_n._n_zeroes; cache_ptr->u.sym = (asymbol *) sym; if (sym->lineno != NULL) { (*_bfd_error_handler) ("%s: warning: duplicate line number information for `%s'", bfd_get_filename (abfd), bfd_asymbol_name (&sym->symbol)); } 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; } static boolean 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; /* Read in the symbol table */ if ((native_symbols = coff_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, (obj_raw_syment_count (abfd) * sizeof (coff_symbol_type)))); if (cached_area == NULL) return false; table_ptr = ((unsigned int *) bfd_alloc (abfd, (obj_raw_syment_count (abfd) * sizeof (unsigned int)))); if (table_ptr == NULL) return false; else { coff_symbol_type *dst = cached_area; unsigned int last_native_index = obj_raw_syment_count (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 = (long) dst; dst->symbol.section = coff_section_from_bfd_index (abfd, src->u.syment.n_scnum); dst->symbol.flags = 0; dst->done_lineno = false; 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 | BSF_FUNCTION; #endif /* Fall through to next case */ #endif case C_EXT: #ifdef RS6000COFF_C case C_HIDEXT: #endif #ifdef COFF_WITH_PE /* PE uses storage class 0x68 to denote a section symbol */ case C_SECTION: /* PE uses storage class 0x67 for a weak external symbol. */ case C_NT_WEAK: #endif if ((src->u.syment.n_scnum) == 0) { if ((src->u.syment.n_value) == 0) { dst->symbol.section = bfd_und_section_ptr; dst->symbol.value = 0; } else { dst->symbol.section = bfd_com_section_ptr; dst->symbol.value = (src->u.syment.n_value); } } else { /* Base the value as an index from the base of the section */ 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 | BSF_FUNCTION; } } #ifdef RS6000COFF_C /* A C_HIDEXT symbol is not global. */ if (src->u.syment.n_sclass == C_HIDEXT) dst->symbol.flags = BSF_LOCAL; /* A symbol with a csect entry should not go at the end. */ if (src->u.syment.n_numaux > 0) dst->symbol.flags |= BSF_NOT_AT_END; #endif #ifdef COFF_WITH_PE if (src->u.syment.n_sclass == C_NT_WEAK) dst->symbol.flags = BSF_WEAK; #endif break; case C_STAT: /* static */ #ifdef I960 case C_LEAFSTAT: /* static leaf procedure */ #endif case C_LABEL: /* label */ if (src->u.syment.n_scnum == -2) dst->symbol.flags = BSF_DEBUGGING; else dst->symbol.flags = BSF_LOCAL; /* Base the value as an index from the base of the section, if there is one. */ if (dst->symbol.section) dst->symbol.value = (src->u.syment.n_value - dst->symbol.section->vma); else dst->symbol.value = src->u.syment.n_value; break; case C_MOS: /* member of structure */ case C_EOS: /* end of structure */ #ifdef NOTDEF /* C_AUTOARG has the same value */ #ifdef C_GLBLREG case C_GLBLREG: /* A29k-specific storage class */ #endif #endif 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 */ #ifdef RS6000COFF_C case C_GSYM: case C_LSYM: case C_PSYM: case C_RSYM: case C_RPSYM: case C_STSYM: case C_BCOMM: case C_ECOMM: case C_DECL: case C_ENTRY: case C_FUN: case C_ESTAT: #endif dst->symbol.flags = BSF_DEBUGGING; dst->symbol.value = (src->u.syment.n_value); break; #ifdef RS6000COFF_C case C_BINCL: /* beginning of include file */ case C_EINCL: /* ending of include file */ /* The value is actually a pointer into the line numbers of the file. We locate the line number entry, and set the section to the section which contains it, and the value to the index in that section. */ { asection *sec; dst->symbol.flags = BSF_DEBUGGING; for (sec = abfd->sections; sec != NULL; sec = sec->next) if (sec->line_filepos <= (file_ptr) src->u.syment.n_value && ((file_ptr) (sec->line_filepos + sec->lineno_count * LINESZ) > (file_ptr) src->u.syment.n_value)) break; if (sec == NULL) dst->symbol.value = 0; else { dst->symbol.section = sec; dst->symbol.value = ((src->u.syment.n_value - sec->line_filepos) / LINESZ); src->fix_line = 1; } } break; case C_BSTAT: dst->symbol.flags = BSF_DEBUGGING; /* The value is actually a symbol index. Save a pointer to the symbol instead of the index. FIXME: This should use a union. */ src->u.syment.n_value = (long) (native_symbols + src->u.syment.n_value); dst->symbol.value = src->u.syment.n_value; src->fix_value = 1; break; #endif case C_BLOCK: /* ".bb" or ".eb" */ case C_FCN: /* ".bf" or ".ef" */ case C_EFCN: /* physical end of function */ 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_NULL: case C_EXTDEF: /* external definition */ case C_ULABEL: /* undefined label */ case C_USTATIC: /* undefined static */ #ifndef COFF_WITH_PE /* C_LINE in regular coff is 0x68. NT has taken over this storage class to represent a section symbol */ case C_LINE: /* line # reformatted as symbol table entry */ /* NT uses 0x67 for a weak symbol, not C_ALIAS. */ case C_ALIAS: /* duplicate tag */ #endif case C_HIDDEN: /* ext symbol in dmert public lib */ default: (*_bfd_error_handler) ("%s: Unrecognized storage class %d for %s symbol `%s'", bfd_get_filename (abfd), src->u.syment.n_sclass, dst->symbol.section->name, dst->symbol.name); 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.i = 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() */ /* Check whether a symbol is globally visible. This is used by the COFF backend linker code in cofflink.c, since a couple of targets have globally visible symbols which are not class C_EXT. This function need not handle the case of n_class == C_EXT. */ #undef OTHER_GLOBAL_CLASS #ifdef I960 #define OTHER_GLOBAL_CLASS C_LEAFEXT #endif #ifdef COFF_WITH_PE #define OTHER_GLOBAL_CLASS C_SECTION #endif #ifdef OTHER_GLOBAL_CLASS static boolean coff_sym_is_global (abfd, syment) bfd *abfd; struct internal_syment *syment; { if (syment->n_sclass == OTHER_GLOBAL_CLASS) return true; return false; } #undef OTHER_GLOBAL_CLASS #else /* ! defined (OTHER_GLOBAL_CLASS) */ /* sym_is_global should not be defined if it has nothing to do. */ #define coff_sym_is_global 0 #endif /* ! defined (OTHER_GLOBAL_CLASS) */ /* 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: o Read the entire coff relocation table into memory. o Process each relocation in turn; first swap it from the external to the internal form. o Turn the symbol referenced in the relocation's symbol index into a pointer into the canonical symbol table. This table is the same as the one returned by a call to @code{bfd_canonicalize_symtab}. The back end will call that routine and save the result if a canonicalization hasn't been done. o 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. */ #ifndef CALC_ADDEND #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ { \ coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ coffsym = (obj_symbols (abfd) \ + (cache_ptr->sym_ptr_ptr - symbols)); \ else if (ptr) \ coffsym = coff_symbol_from (abfd, ptr); \ if (coffsym != (coff_symbol_type *) NULL \ && coffsym->native->u.syment.n_scnum == 0) \ cache_ptr->addend = 0; \ else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ && ptr->section != (asection *) NULL) \ cache_ptr->addend = - (ptr->section->vma + ptr->value); \ else \ cache_ptr->addend = 0; \ } #endif static boolean coff_slurp_reloc_table (abfd, asect, symbols) bfd * abfd; sec_ptr asect; asymbol ** symbols; { RELOC *native_relocs; arelent *reloc_cache; arelent *cache_ptr; unsigned int idx; if (asect->relocation) return true; if (asect->reloc_count == 0) return true; if (asect->flags & SEC_CONSTRUCTOR) 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) return false; for (idx = 0; idx < asect->reloc_count; idx++) { #ifdef RELOC_PROCESSING struct internal_reloc dst; struct external_reloc *src; cache_ptr = reloc_cache + idx; src = native_relocs + idx; coff_swap_reloc_in (abfd, src, &dst); RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); #else struct internal_reloc dst; asymbol *ptr; struct external_reloc *src; cache_ptr = reloc_cache + idx; src = native_relocs + idx; coff_swap_reloc_in (abfd, src, &dst); cache_ptr->address = dst.r_vaddr; if (dst.r_symndx != -1) { /* @@ Should never be greater than count of symbols! */ if (dst.r_symndx >= obj_conv_table_size (abfd)) abort (); cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx]; ptr = *(cache_ptr->sym_ptr_ptr); } else { cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; ptr = 0; } /* 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 */ /* Calculate any reloc addend by looking at the symbol */ CALC_ADDEND (abfd, ptr, dst, cache_ptr); cache_ptr->address -= asect->vma; /* !! cache_ptr->section = (asection *) NULL;*/ /* Fill in the cache_ptr->howto field from dst.r_type */ RTYPE2HOWTO (cache_ptr, &dst); #endif } asect->relocation = reloc_cache; return true; } #ifndef coff_rtype_to_howto #ifdef RTYPE2HOWTO /* Get the howto structure for a reloc. This is only used if the file including this one defines coff_relocate_section to be _bfd_coff_generic_relocate_section, so it is OK if it does not always work. It is the responsibility of the including file to make sure it is reasonable if it is needed. */ static reloc_howto_type *coff_rtype_to_howto PARAMS ((bfd *, asection *, struct internal_reloc *, struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *)); /*ARGSUSED*/ static reloc_howto_type * coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp) bfd *abfd; asection *sec; struct internal_reloc *rel; struct coff_link_hash_entry *h; struct internal_syment *sym; bfd_vma *addendp; { arelent genrel; RTYPE2HOWTO (&genrel, rel); return genrel.howto; } #else /* ! defined (RTYPE2HOWTO) */ #define coff_rtype_to_howto NULL #endif /* ! defined (RTYPE2HOWTO) */ #endif /* ! defined (coff_rtype_to_howto) */ /* This is stupid. This function should be a boolean predicate. */ static long 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 (section->flags & SEC_CONSTRUCTOR) { /* this section has relocs made up by us, they are not in the file, so take them out of their chain and place them into the data area provided */ arelent_chain *chain = section->constructor_chain; for (count = 0; count < section->reloc_count; count++) { *relptr++ = &chain->relent; chain = chain->next; } } else { if (! coff_slurp_reloc_table (abfd, section, symbols)) return -1; tblptr = section->relocation; for (; count++ < section->reloc_count;) *relptr++ = tblptr++; } *relptr = 0; return section->reloc_count; } #ifdef GNU960 file_ptr coff_sym_filepos (abfd) bfd *abfd; { return obj_sym_filepos (abfd); } #endif #ifndef coff_reloc16_estimate #define coff_reloc16_estimate dummy_reloc16_estimate static int dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info) bfd *abfd; asection *input_section; arelent *reloc; unsigned int shrink; struct bfd_link_info *link_info; { abort (); } #endif #ifndef coff_reloc16_extra_cases #define coff_reloc16_extra_cases dummy_reloc16_extra_cases /* This works even if abort is not declared in any header file. */ static void dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr) bfd *abfd; struct bfd_link_info *link_info; struct bfd_link_order *link_order; arelent *reloc; bfd_byte *data; unsigned int *src_ptr; unsigned int *dst_ptr; { abort (); } #endif /* If coff_relocate_section is defined, we can use the optimized COFF backend linker. Otherwise we must continue to use the old linker. */ #ifdef coff_relocate_section #ifndef coff_bfd_link_hash_table_create #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create #endif #ifndef coff_bfd_link_add_symbols #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols #endif #ifndef coff_bfd_final_link #define coff_bfd_final_link _bfd_coff_final_link #endif #else /* ! defined (coff_relocate_section) */ #define coff_relocate_section NULL #ifndef coff_bfd_link_hash_table_create #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create #endif #ifndef coff_bfd_link_add_symbols #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols #endif #define coff_bfd_final_link _bfd_generic_final_link #endif /* ! defined (coff_relocate_section) */ #define coff_bfd_link_split_section _bfd_generic_link_split_section #ifndef coff_start_final_link #define coff_start_final_link NULL #endif #ifndef coff_adjust_symndx #define coff_adjust_symndx NULL #endif #ifndef coff_link_add_one_symbol #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol #endif static CONST bfd_coff_backend_data bfd_coff_std_swap_table = { coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in, coff_swap_aux_out, coff_swap_sym_out, coff_swap_lineno_out, coff_swap_reloc_out, coff_swap_filehdr_out, coff_swap_aouthdr_out, coff_swap_scnhdr_out, FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ, #ifdef COFF_LONG_FILENAMES true, #else false, #endif #ifdef COFF_LONG_SECTION_NAMES true, #else false, #endif coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in, coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook, coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook, coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate, coff_sym_is_global, coff_compute_section_file_positions, coff_start_final_link, coff_relocate_section, coff_rtype_to_howto, coff_adjust_symndx, coff_link_add_one_symbol }; #define coff_close_and_cleanup _bfd_generic_close_and_cleanup #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info #define coff_get_section_contents _bfd_generic_get_section_contents #ifndef coff_bfd_copy_private_symbol_data #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data #endif #ifndef coff_bfd_copy_private_section_data #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data #endif #ifndef coff_bfd_copy_private_bfd_data #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data #endif #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags #ifndef coff_bfd_print_private_bfd_data #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data #endif #ifndef coff_bfd_is_local_label #define coff_bfd_is_local_label bfd_generic_is_local_label #endif #ifndef coff_read_minisymbols #define coff_read_minisymbols _bfd_generic_read_minisymbols #endif #ifndef coff_minisymbol_to_symbol #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol #endif /* The reloc lookup routine must be supplied by each individual COFF backend. */ #ifndef coff_bfd_reloc_type_lookup #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup #endif #ifndef coff_bfd_get_relocated_section_contents #define coff_bfd_get_relocated_section_contents \ bfd_generic_get_relocated_section_contents #endif #ifndef coff_bfd_relax_section #define coff_bfd_relax_section bfd_generic_relax_section #endif