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binutils-gdb/bfd/coffcode.h
Steve Chamberlain 54862c89ac * coffcode.h (coff_write_object_contents): use RELSZ to work out 
size of output reloc struct.
1992-05-02 01:46:50 +00:00

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/* Support for the generic parts of most COFF variants, for BFD.
Copyright (C) 1990-1991 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., 675 Mass Ave, Cambridge, MA 02139, 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 difference between formats are the sizes and
alignments of fields in structures on disk, and the occasional
extra field.
Coff in all its varieties is implimented with a few common
files and a number of implementation specific files. For
example, The 88k bcs coff format is implemented in the file
@code{coff-m88k.c}. This file @code{#include}s
@code{coff-m88k.h} which defines the external structure of the
coff format for the 88k, and @code{internalcoff.h} which
defines the internal structure. @code{coff-m88k.c} also
defines pthe relocations used by the 88k format
@xref{Relocations}. Then the major portion of coff code is
included (@code{coffcode.h}) which defines the methods used to
act upon the types defined in @code{coff-m88k.h} and
@code{internalcoff.h}.
The Intel i960 processor version of coff is implemented in
@code{coff-i960.c}. This file has the same structure as
@code{coff-m88k.c}, except that it includes @code{coff-i960.h}
rather than @code{coff-m88k.h}.
SUBSECTION
Porting To A New Version of Coff
The recommended method is to select from the existing
implimentations the version of coff which is most like the one
you want to use, for our purposes, we'll say that i386 coff is
the one you select, and that your coff flavour is called foo.
Copy the @code{i386coff.c} to @code{foocoff.c}, copy
@code{../include/i386coff.h} to @code{../include/foocoff.h}
and add the lines to @code{targets.c} and @code{Makefile.in}
so that your new back end is used. Alter the shapes of the
structures in @code{../include/foocoff.h} so that they match
what you need. You will probably also have to add
@code{#ifdef}s to the code in @code{internalcoff.h} and
@code{coffcode.h} if your version of coff is too wild.
You can verify that your new BFD backend works quite simply by
building @code{objdump} from the @code{binutils} directory,
and making sure that its version of what's going on at your
host systems idea (assuming it has the pretty standard coff
dump utility (usually called @code{att-dump} or just
@code{dump})) are the same. Then clean up your code, and send
what you've done to Cygnus. Then your stuff will be in the
next release, and you won't have to keep integrating it.
SUBSECTION
How The Coff Backend Works
SUBSUBSECTION
Bit Twiddling
Each flavour of coff supported in BFD has its own header file
descibing the external layout of the structures. There is also
an internal description of the coff layout (in
@code{internalcoff.h}) file (@code{}). A major function of the
coff backend is swapping the bytes and twiddling the bits to
translate the external form of the structures into the normal
internal form. This is all performed in the
@code{bfd_swap}_@i{thing}_@i{direction} routines. Some
elements are different sizes between different versions of
coff, it is the duty of the coff version specific include file
to override the definitions of various packing routines in
@code{coffcode.h}. Eg the size of line number entry in coff is
sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
@code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
correct one. No doubt, some day someone will find a version of
coff which has a varying field size not catered for at the
moment. To port BFD, that person will have to add more @code{#defines}.
Three of the bit twiddling routines are exported to
@code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
table on its own, but uses BFD to fix things up. 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. This 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 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{get_normalized_symtab}. This reads the symbol table from
the coff file and swaps all the structures inside into the
internal form. It also fixes up all the pointers in the table
(represented in the file by offsets from the first symbol in
the table) into physical pointers to elements in the new
internal table. This involves some work since the meanings of
fields changes depending upon context; a field that is a
pointer to another structure in the symbol table at one moment
may be the size in bytes of a structure in the next. Another
pass is made over the table. All symbols which mark file names
(<<C_FILE>> symbols) are modified so that the internal
string points to the value in the auxent (the real filename)
rather than the normal text associated with the symbol
(@code{".file"}).
At this time the symbol names are moved around. Coff stores
all symbols less than nine characters long physically
within the symbol table, longer strings are kept at the end of
the file in the string table. This pass moves all strings
into memory, and replaces them with pointers to the strings.
The symbol table is massaged once again, this time to create
the canonical table used by the BFD application. Each symbol
is inspected in turn, and a decision made (using the
@code{sclass} field) about the various flags to set in the
@code{asymbol} @xref{Symbols}. The generated canonical table
shares strings with the hidden internal symbol table.
Any linenumbers are read from the coff file too, and 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 was born, and on output
the back end makes sure that the same destination target as
source target is present.
When the symbols have come from a coff file then all the
debugging information is preserved.
Symbol tables are provided for writing to the back end in a
vector of pointers to pointers. This allows applications like
the linker to accumulate and output large symbol tables
without having to do too much byte copying.
This function runs through the provided symbol table and
patches each symbol marked as a file place holder
(@code{C_FILE}) to point to the next file place holder in the
list. It also marks each @code{offset} field in the list with
the offset from the first symbol of the current symbol.
Another function of this procedure is to turn the canonical
value form of BFD into the form used by coff. Internally, BFD
expects symbol values to be offsets from a section base; so a
symbol physically at 0x120, but in a section starting at
0x100, would have the value 0x20. Coff expects symbols to
contain their final value, so symbols have their values
changed at this point to reflect their sum with their owning
section. Note that this transformation uses the
<<output_section>> field of the @code{asymbol}'s
@code{asection} @xref{Sections}.
o coff_mangle_symbols
This routine runs though the provided symbol table and uses
the offsets generated by the previous pass and the pointers
generated when the symbol table was read in to create the
structured hierachy required by coff. It changes each pointer
to a symbol to an index into the symbol table of the symbol
being referenced.
o coff_write_symbols
This routine runs through the symbol table and patches up the
symbols from their internal form into the coff way, calls the
bit twiddlers and writes out the tabel to the file.
*/
/*
INTERNAL_DEFINITION
coff_symbol_type
DESCRIPTION
The hidden information for an asymbol is described in a
coff_ptr_struct, which is typedefed to a combined_entry_type
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 tag field of this symbol be renumbered.
. Created by coff_pointerize_aux. *}
.char fix_tag;
.
. {* Should the endidx field of this symbol be renumbered.
. Created by coff_pointerize_aux. *}
.char fix_end;
.
. {* The container for the symbol structure as read and translated
. from the file. *}
.
.union {
. union internal_auxent auxent;
. struct internal_syment syment;
. } u;
.} combined_entry_type;
.
.
.{* Each canonical asymbol really looks like this: *}
.
.typedef struct coff_symbol_struct
.{
. {* The actual symbol which the rest of BFD works with *}
.asymbol symbol;
.
. {* A pointer to the hidden information for this symbol *}
.combined_entry_type *native;
.
. {* A pointer to the linenumber information for this symbol *}
.struct lineno_cache_entry *lineno;
.
. {* Have the line numbers been relocated yet ? *}
.boolean done_lineno;
.} coff_symbol_type;
*/
#include "seclet.h"
extern bfd_error_vector_type bfd_error_vector;
#define PUTWORD bfd_h_put_32
#define PUTHALF bfd_h_put_16
#define PUTBYTE bfd_h_put_8
#ifndef GET_FCN_LNNOPTR
#define GET_FCN_LNNOPTR(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_fcn.x_lnnoptr)
#endif
#ifndef GET_FCN_ENDNDX
#define GET_FCN_ENDNDX(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_fcn.x_endndx)
#endif
#ifndef PUT_FCN_LNNOPTR
#define PUT_FCN_LNNOPTR(abfd, in, ext) PUTWORD(abfd, in, (bfd_byte *) ext->x_sym.x_fcnary.x_fcn.x_lnnoptr)
#endif
#ifndef PUT_FCN_ENDNDX
#define PUT_FCN_ENDNDX(abfd, in, ext) PUTWORD(abfd, in, (bfd_byte *) ext->x_sym.x_fcnary.x_fcn.x_endndx)
#endif
#ifndef GET_LNSZ_LNNO
#define GET_LNSZ_LNNO(abfd, ext) bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_misc.x_lnsz.x_lnno)
#endif
#ifndef GET_LNSZ_SIZE
#define GET_LNSZ_SIZE(abfd, ext) bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_misc.x_lnsz.x_size)
#endif
#ifndef PUT_LNSZ_LNNO
#define PUT_LNSZ_LNNO(abfd, in, ext) bfd_h_put_16(abfd, in, (bfd_byte *)ext->x_sym.x_misc.x_lnsz.x_lnno)
#endif
#ifndef PUT_LNSZ_SIZE
#define PUT_LNSZ_SIZE(abfd, in, ext) bfd_h_put_16(abfd, in, (bfd_byte*) ext->x_sym.x_misc.x_lnsz.x_size)
#endif
#ifndef GET_SCN_SCNLEN
#define GET_SCN_SCNLEN(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) ext->x_scn.x_scnlen)
#endif
#ifndef GET_SCN_NRELOC
#define GET_SCN_NRELOC(abfd, ext) bfd_h_get_16(abfd, (bfd_byte *)ext->x_scn.x_nreloc)
#endif
#ifndef GET_SCN_NLINNO
#define GET_SCN_NLINNO(abfd, ext) bfd_h_get_16(abfd, (bfd_byte *)ext->x_scn.x_nlinno)
#endif
#ifndef PUT_SCN_SCNLEN
#define PUT_SCN_SCNLEN(abfd,in, ext) bfd_h_put_32(abfd, in, (bfd_byte *) ext->x_scn.x_scnlen)
#endif
#ifndef PUT_SCN_NRELOC
#define PUT_SCN_NRELOC(abfd,in, ext) bfd_h_put_16(abfd, in, (bfd_byte *)ext->x_scn.x_nreloc)
#endif
#ifndef PUT_SCN_NLINNO
#define PUT_SCN_NLINNO(abfd,in, ext) bfd_h_put_16(abfd,in, (bfd_byte *) ext->x_scn.x_nlinno)
#endif
#ifndef GET_LINENO_LNNO
#define GET_LINENO_LNNO(abfd, ext) bfd_h_get_16(abfd, (bfd_byte *) (ext->l_lnno));
#endif
#ifndef PUT_LINENO_LNNO
#define PUT_LINENO_LNNO(abfd,val, ext) bfd_h_put_16(abfd,val, (bfd_byte *) (ext->l_lnno));
#endif
/* 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
DEFUN(sec_to_styp_flags, (sec_name, sec_flags),
CONST char * sec_name AND
flagword sec_flags)
{
long styp_flags = 0;
if (!strcmp(sec_name, _TEXT)) {
return((long)STYP_TEXT);
} else if (!strcmp(sec_name, _DATA)) {
return((long)STYP_DATA);
} else if (!strcmp(sec_name, _BSS)) {
return((long)STYP_BSS);
#ifdef _COMMENT
} else if (!strcmp(sec_name, _COMMENT)) {
return((long)STYP_INFO);
#endif /* _COMMENT */
}
/* Try and figure out what it should be */
if (sec_flags & SEC_CODE) styp_flags = STYP_TEXT;
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;
if (styp_flags == 0) styp_flags = STYP_BSS;
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
DEFUN(styp_to_sec_flags, (styp_flags),
long styp_flags)
{
flagword sec_flags=0;
if ((styp_flags & STYP_TEXT) || (styp_flags & STYP_DATA))
sec_flags = (SEC_LOAD | SEC_ALLOC);
else if (styp_flags & STYP_BSS)
sec_flags = SEC_ALLOC;
#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 */
return(sec_flags);
}
#define get_index(symbol) ((int) (symbol)->udata)
#define set_index(symbol, idx) ((symbol)->udata =(PTR) (idx))
/* **********************************************************************
Here are all the routines for swapping the structures seen in the
outside world into the internal forms.
*/
static void
DEFUN(bfd_swap_reloc_in,(abfd, reloc_src, reloc_dst),
bfd *abfd AND
RELOC *reloc_src AND
struct internal_reloc *reloc_dst)
{
reloc_dst->r_vaddr = bfd_h_get_32(abfd, (bfd_byte *)reloc_src->r_vaddr);
reloc_dst->r_symndx = bfd_h_get_32(abfd, (bfd_byte *) reloc_src->r_symndx);
#ifdef RS6000COFF_C
reloc_dst->r_type = bfd_h_get_8(abfd, reloc_src->r_type);
reloc_dst->r_size = bfd_h_get_8(abfd, reloc_src->r_size);
#else
reloc_dst->r_type = bfd_h_get_16(abfd, (bfd_byte *) reloc_src->r_type);
#endif
#ifdef SWAP_IN_RELOC_OFFSET
reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET(abfd,
(bfd_byte *) reloc_src->r_offset);
#endif
}
static unsigned int
DEFUN(coff_swap_reloc_out,(abfd, src, dst),
bfd *abfd AND
PTR src AND
PTR dst)
{
struct internal_reloc *reloc_src = (struct internal_reloc *)src;
struct external_reloc *reloc_dst = (struct external_reloc *)dst;
bfd_h_put_32(abfd, reloc_src->r_vaddr, (bfd_byte *) reloc_dst->r_vaddr);
bfd_h_put_32(abfd, reloc_src->r_symndx, (bfd_byte *) reloc_dst->r_symndx);
bfd_h_put_16(abfd, reloc_src->r_type, (bfd_byte *)
reloc_dst->r_type);
#ifdef SWAP_OUT_RELOC_OFFSET
SWAP_OUT_RELOC_OFFSET(abfd,
reloc_src->r_offset,
(bfd_byte *) reloc_dst->r_offset);
#endif
#ifdef SWAP_OUT_RELOC_EXTRA
SWAP_OUT_RELOC_EXTRA(abfd,reloc_src, reloc_dst);
#endif
return sizeof(struct external_reloc);
}
static void
DEFUN(bfd_swap_filehdr_in,(abfd, filehdr_src, filehdr_dst),
bfd *abfd AND
FILHDR *filehdr_src AND
struct internal_filehdr *filehdr_dst)
{
filehdr_dst->f_magic = bfd_h_get_16(abfd, (bfd_byte *) filehdr_src->f_magic);
filehdr_dst->f_nscns = bfd_h_get_16(abfd, (bfd_byte *)filehdr_src-> f_nscns);
filehdr_dst->f_timdat = bfd_h_get_32(abfd, (bfd_byte *)filehdr_src-> f_timdat);
filehdr_dst->f_symptr = bfd_h_get_32(abfd, (bfd_byte *)filehdr_src-> f_symptr);
filehdr_dst->f_nsyms = bfd_h_get_32(abfd, (bfd_byte *)filehdr_src-> f_nsyms);
filehdr_dst->f_opthdr = bfd_h_get_16(abfd, (bfd_byte *)filehdr_src-> f_opthdr);
filehdr_dst->f_flags = bfd_h_get_16(abfd, (bfd_byte *)filehdr_src-> f_flags);
}
static unsigned int
DEFUN(coff_swap_filehdr_out,(abfd, in, out),
bfd *abfd AND
PTR in AND
PTR out)
{
struct internal_filehdr *filehdr_in = (struct internal_filehdr *)in;
FILHDR *filehdr_out = (FILHDR *)out;
bfd_h_put_16(abfd, filehdr_in->f_magic, (bfd_byte *) filehdr_out->f_magic);
bfd_h_put_16(abfd, filehdr_in->f_nscns, (bfd_byte *) filehdr_out->f_nscns);
bfd_h_put_32(abfd, filehdr_in->f_timdat, (bfd_byte *) filehdr_out->f_timdat);
bfd_h_put_32(abfd, filehdr_in->f_symptr, (bfd_byte *) filehdr_out->f_symptr);
bfd_h_put_32(abfd, filehdr_in->f_nsyms, (bfd_byte *) filehdr_out->f_nsyms);
bfd_h_put_16(abfd, filehdr_in->f_opthdr, (bfd_byte *) filehdr_out->f_opthdr);
bfd_h_put_16(abfd, filehdr_in->f_flags, (bfd_byte *) filehdr_out->f_flags);
return sizeof(FILHDR);
}
#ifndef NO_COFF_SYMBOLS
static void
DEFUN(coff_swap_sym_in,(abfd, ext1, in1),
bfd *abfd AND
PTR ext1 AND
PTR in1)
{
SYMENT *ext = (SYMENT *)ext1;
struct internal_syment *in = (struct internal_syment *)in1;
if( ext->e.e_name[0] == 0) {
in->_n._n_n._n_zeroes = 0;
in->_n._n_n._n_offset = bfd_h_get_32(abfd, (bfd_byte *) ext->e.e.e_offset);
}
else {
#if SYMNMLEN != E_SYMNMLEN
-> Error, we need to cope with truncating or extending SYMNMLEN!;
#else
memcpy(in->_n._n_name, ext->e.e_name, SYMNMLEN);
#endif
}
in->n_value = bfd_h_get_32(abfd, (bfd_byte *) ext->e_value);
in->n_scnum = bfd_h_get_16(abfd, (bfd_byte *) ext->e_scnum);
if (sizeof(ext->e_type) == 2){
in->n_type = bfd_h_get_16(abfd, (bfd_byte *) ext->e_type);
}
else {
in->n_type = bfd_h_get_32(abfd, (bfd_byte *) ext->e_type);
}
in->n_sclass = bfd_h_get_8(abfd, ext->e_sclass);
in->n_numaux = bfd_h_get_8(abfd, ext->e_numaux);
}
static unsigned int
DEFUN(coff_swap_sym_out,(abfd, inp, extp),
bfd *abfd AND
PTR inp AND
PTR extp)
{
struct internal_syment *in = (struct internal_syment *)inp;
SYMENT *ext =(SYMENT *)extp;
if(in->_n._n_name[0] == 0) {
bfd_h_put_32(abfd, 0, (bfd_byte *) ext->e.e.e_zeroes);
bfd_h_put_32(abfd, in->_n._n_n._n_offset, (bfd_byte *) ext->e.e.e_offset);
}
else {
#if SYMNMLEN != E_SYMNMLEN
-> Error, we need to cope with truncating or extending SYMNMLEN!;
#else
memcpy(ext->e.e_name, in->_n._n_name, SYMNMLEN);
#endif
}
bfd_h_put_32(abfd, in->n_value , (bfd_byte *) ext->e_value);
bfd_h_put_16(abfd, in->n_scnum , (bfd_byte *) ext->e_scnum);
if (sizeof(ext->e_type) == 2)
{
bfd_h_put_16(abfd, in->n_type , (bfd_byte *) ext->e_type);
}
else
{
bfd_h_put_32(abfd, in->n_type , (bfd_byte *) ext->e_type);
}
bfd_h_put_8(abfd, in->n_sclass , ext->e_sclass);
bfd_h_put_8(abfd, in->n_numaux , ext->e_numaux);
return sizeof(SYMENT);
}
static void
DEFUN(coff_swap_aux_in,(abfd, ext1, type, class, in1),
bfd *abfd AND
PTR ext1 AND
int type AND
int class AND
PTR in1)
{
AUXENT *ext = (AUXENT *)ext1;
union internal_auxent *in = (union internal_auxent *)in1;
switch (class) {
case C_FILE:
if (ext->x_file.x_fname[0] == 0) {
in->x_file.x_n.x_zeroes = 0;
in->x_file.x_n.x_offset =
bfd_h_get_32(abfd, (bfd_byte *) ext->x_file.x_n.x_offset);
} else {
#if FILNMLEN != E_FILNMLEN
-> Error, we need to cope with truncating or extending FILNMLEN!;
#else
memcpy (in->x_file.x_fname, ext->x_file.x_fname, FILNMLEN);
#endif
}
break;
/* RS/6000 "csect" auxents */
#ifdef RS6000COFF_C
case C_EXT:
case C_HIDEXT:
in->x_csect.x_scnlen = bfd_h_get_32 (abfd, (bfd_byte *) ext->x_csect.x_scnlen);
in->x_csect.x_parmhash = bfd_h_get_32 (abfd, (bfd_byte *) ext->x_csect.x_parmhash);
in->x_csect.x_snhash = bfd_h_get_16 (abfd, (bfd_byte *) ext->x_csect.x_snhash);
/* We don't have to hack bitfields in x_smtyp because it's defined by
shifts-and-ands, which are equivalent on all byte orders. */
in->x_csect.x_smtyp = bfd_h_get_8 (abfd, (bfd_byte *) ext->x_csect.x_smtyp);
in->x_csect.x_smclas = bfd_h_get_8 (abfd, (bfd_byte *) ext->x_csect.x_smclas);
in->x_csect.x_stab = bfd_h_get_32 (abfd, (bfd_byte *) ext->x_csect.x_stab);
in->x_csect.x_snstab = bfd_h_get_16 (abfd, (bfd_byte *) ext->x_csect.x_snstab);
break;
#endif
case C_STAT:
#ifdef C_LEAFSTAT
case C_LEAFSTAT:
#endif
case C_HIDDEN:
if (type == T_NULL) {
in->x_scn.x_scnlen = GET_SCN_SCNLEN(abfd, ext);
in->x_scn.x_nreloc = GET_SCN_NRELOC(abfd, ext);
in->x_scn.x_nlinno = GET_SCN_NLINNO(abfd, ext);
break;
}
default:
in->x_sym.x_tagndx.l = bfd_h_get_32(abfd, (bfd_byte *) ext->x_sym.x_tagndx);
#ifndef NO_TVNDX
in->x_sym.x_tvndx = bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_tvndx);
#endif
if (ISARY(type) || class == C_BLOCK) {
#if DIMNUM != E_DIMNUM
-> Error, we need to cope with truncating or extending DIMNUM!;
#else
in->x_sym.x_fcnary.x_ary.x_dimen[0] = bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_ary.x_dimen[0]);
in->x_sym.x_fcnary.x_ary.x_dimen[1] = bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_ary.x_dimen[1]);
in->x_sym.x_fcnary.x_ary.x_dimen[2] = bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_ary.x_dimen[2]);
in->x_sym.x_fcnary.x_ary.x_dimen[3] = bfd_h_get_16(abfd, (bfd_byte *) ext->x_sym.x_fcnary.x_ary.x_dimen[3]);
#endif
}
in->x_sym.x_fcnary.x_fcn.x_lnnoptr = GET_FCN_LNNOPTR(abfd, ext);
in->x_sym.x_fcnary.x_fcn.x_endndx.l = GET_FCN_ENDNDX(abfd, ext);
if (ISFCN(type)) {
in->x_sym.x_misc.x_fsize = bfd_h_get_32(abfd, (bfd_byte *) ext->x_sym.x_misc.x_fsize);
}
else {
in->x_sym.x_misc.x_lnsz.x_lnno = GET_LNSZ_LNNO(abfd, ext);
in->x_sym.x_misc.x_lnsz.x_size = GET_LNSZ_SIZE(abfd, ext);
}
}
}
static unsigned int
DEFUN(coff_swap_aux_out,(abfd, inp, type, class, extp),
bfd *abfd AND
PTR inp AND
int type AND
int class AND
PTR extp)
{
union internal_auxent *in = (union internal_auxent *)inp;
AUXENT *ext = (AUXENT *)extp;
switch (class) {
case C_FILE:
if (in->x_file.x_fname[0] == 0) {
PUTWORD(abfd, 0, (bfd_byte *) ext->x_file.x_n.x_zeroes);
PUTWORD(abfd,
in->x_file.x_n.x_offset,
(bfd_byte *) ext->x_file.x_n.x_offset);
}
else {
#if FILNMLEN != E_FILNMLEN
-> Error, we need to cope with truncating or extending FILNMLEN!;
#else
memcpy (ext->x_file.x_fname, in->x_file.x_fname, FILNMLEN);
#endif
}
break;
#ifdef RS6000COFF_C
/* RS/6000 "csect" auxents */
case C_EXT:
case C_HIDEXT:
PUTWORD (abfd, in->x_csect.x_scnlen, ext->x_csect.x_scnlen);
PUTWORD (abfd, in->x_csect.x_parmhash, ext->x_csect.x_parmhash);
PUTHALF (abfd, in->x_csect.x_snhash, ext->x_csect.x_snhash);
/* We don't have to hack bitfields in x_smtyp because it's defined by
shifts-and-ands, which are equivalent on all byte orders. */
PUTBYTE (abfd, in->x_csect.x_smtyp, ext->x_csect.x_smtyp);
PUTBYTE (abfd, in->x_csect.x_smclas, ext->x_csect.x_smclas);
PUTWORD (abfd, in->x_csect.x_stab, ext->x_csect.x_stab);
PUTHALF (abfd, in->x_csect.x_snstab, ext->x_csect.x_snstab);
break;
#endif
case C_STAT:
#ifdef C_LEAFSTAT
case C_LEAFSTAT:
#endif
case C_HIDDEN:
if (type == T_NULL) {
PUT_SCN_SCNLEN(abfd, in->x_scn.x_scnlen, ext);
PUT_SCN_NRELOC(abfd, in->x_scn.x_nreloc, ext);
PUT_SCN_NLINNO(abfd, in->x_scn.x_nlinno, ext);
break;
}
default:
PUTWORD(abfd, in->x_sym.x_tagndx.l, (bfd_byte *) ext->x_sym.x_tagndx);
#ifndef NO_TVNDX
bfd_h_put_16(abfd, in->x_sym.x_tvndx , (bfd_byte *) ext->x_sym.x_tvndx);
#endif
if (ISFCN(type)) {
PUTWORD(abfd, in->x_sym.x_misc.x_fsize, (bfd_byte *) ext->x_sym.x_misc.x_fsize);
PUT_FCN_LNNOPTR(abfd, in->x_sym.x_fcnary.x_fcn.x_lnnoptr, ext);
PUT_FCN_ENDNDX(abfd, in->x_sym.x_fcnary.x_fcn.x_endndx.l, ext);
}
else {
if (ISARY(type) || class == C_BLOCK) {
#if DIMNUM != E_DIMNUM
-> Error, we need to cope with truncating or extending DIMNUM!;
#else
bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[0], (bfd_byte *)ext->x_sym.x_fcnary.x_ary.x_dimen[0]);
bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[1], (bfd_byte *)ext->x_sym.x_fcnary.x_ary.x_dimen[1]);
bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[2], (bfd_byte *)ext->x_sym.x_fcnary.x_ary.x_dimen[2]);
bfd_h_put_16(abfd, in->x_sym.x_fcnary.x_ary.x_dimen[3], (bfd_byte *)ext->x_sym.x_fcnary.x_ary.x_dimen[3]);
#endif
}
PUT_LNSZ_LNNO(abfd, in->x_sym.x_misc.x_lnsz.x_lnno, ext);
PUT_LNSZ_SIZE(abfd, in->x_sym.x_misc.x_lnsz.x_size, ext);
PUT_FCN_LNNOPTR(abfd, in->x_sym.x_fcnary.x_fcn.x_lnnoptr, ext);
PUT_FCN_ENDNDX(abfd, in->x_sym.x_fcnary.x_fcn.x_endndx.l, ext);
}
}
return sizeof(AUXENT);
}
#endif /* NO_COFF_SYMBOLS */
#ifndef NO_COFF_LINENOS
static void
DEFUN(coff_swap_lineno_in,(abfd, ext1, in1),
bfd *abfd AND
PTR ext1 AND
PTR in1)
{
LINENO *ext = (LINENO *)ext1;
struct internal_lineno *in = (struct internal_lineno *)in1;
in->l_addr.l_symndx = bfd_h_get_32(abfd, (bfd_byte *) ext->l_addr.l_symndx);
in->l_lnno = GET_LINENO_LNNO(abfd, ext);
}
static unsigned int
DEFUN(coff_swap_lineno_out,(abfd, inp, outp),
bfd *abfd AND
PTR inp AND
PTR outp)
{
struct internal_lineno *in = (struct internal_lineno *)inp;
struct external_lineno *ext = (struct external_lineno *)outp;
PUTWORD(abfd, in->l_addr.l_symndx, (bfd_byte *)
ext->l_addr.l_symndx);
PUT_LINENO_LNNO (abfd, in->l_lnno, ext);
return sizeof(struct external_lineno);
}
#endif /* NO_COFF_LINENOS */
static void
DEFUN(bfd_swap_aouthdr_in,(abfd, aouthdr_ext1, aouthdr_int1),
bfd *abfd AND
PTR aouthdr_ext1 AND
PTR aouthdr_int1)
{
AOUTHDR *aouthdr_ext = (AOUTHDR *) aouthdr_ext1;
struct internal_aouthdr *aouthdr_int = (struct internal_aouthdr *)aouthdr_int1;
aouthdr_int->magic = bfd_h_get_16(abfd, (bfd_byte *) aouthdr_ext->magic);
aouthdr_int->vstamp = bfd_h_get_16(abfd, (bfd_byte *) aouthdr_ext->vstamp);
aouthdr_int->tsize = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->tsize);
aouthdr_int->dsize = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->dsize);
aouthdr_int->bsize = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->bsize);
aouthdr_int->entry = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->entry);
aouthdr_int->text_start = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->text_start);
aouthdr_int->data_start = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->data_start);
#ifdef I960
aouthdr_int->tagentries = bfd_h_get_32(abfd, (bfd_byte *) aouthdr_ext->tagentries);
#endif
#ifdef RS6000COFF_C
aouthdr_int->o_toc = bfd_h_get_32(abfd, aouthdr_ext->o_toc);
aouthdr_int->o_snentry = bfd_h_get_16(abfd, aouthdr_ext->o_snentry);
aouthdr_int->o_sntext = bfd_h_get_16(abfd, aouthdr_ext->o_sntext);
aouthdr_int->o_sndata = bfd_h_get_16(abfd, aouthdr_ext->o_sndata);
aouthdr_int->o_sntoc = bfd_h_get_16(abfd, aouthdr_ext->o_sntoc);
aouthdr_int->o_snloader = bfd_h_get_16(abfd, aouthdr_ext->o_snloader);
aouthdr_int->o_snbss = bfd_h_get_16(abfd, aouthdr_ext->o_snbss);
aouthdr_int->o_algntext = bfd_h_get_16(abfd, aouthdr_ext->o_algntext);
aouthdr_int->o_algndata = bfd_h_get_16(abfd, aouthdr_ext->o_algndata);
aouthdr_int->o_modtype = bfd_h_get_16(abfd, aouthdr_ext->o_modtype);
aouthdr_int->o_maxstack = bfd_h_get_32(abfd, aouthdr_ext->o_maxstack);
#endif
}
static unsigned int
DEFUN(coff_swap_aouthdr_out,(abfd, in, out),
bfd *abfd AND
PTR in AND
PTR out)
{
struct internal_aouthdr *aouthdr_in = (struct internal_aouthdr *)in;
AOUTHDR *aouthdr_out = (AOUTHDR *)out;
bfd_h_put_16(abfd, aouthdr_in->magic, (bfd_byte *) aouthdr_out->magic);
bfd_h_put_16(abfd, aouthdr_in->vstamp, (bfd_byte *) aouthdr_out->vstamp);
bfd_h_put_32(abfd, aouthdr_in->tsize, (bfd_byte *) aouthdr_out->tsize);
bfd_h_put_32(abfd, aouthdr_in->dsize, (bfd_byte *) aouthdr_out->dsize);
bfd_h_put_32(abfd, aouthdr_in->bsize, (bfd_byte *) aouthdr_out->bsize);
bfd_h_put_32(abfd, aouthdr_in->entry, (bfd_byte *) aouthdr_out->entry);
bfd_h_put_32(abfd, aouthdr_in->text_start,
(bfd_byte *) aouthdr_out->text_start);
bfd_h_put_32(abfd, aouthdr_in->data_start, (bfd_byte *) aouthdr_out->data_start);
#ifdef I960
bfd_h_put_32(abfd, aouthdr_in->tagentries, (bfd_byte *) aouthdr_out->tagentries);
#endif
return sizeof(AOUTHDR);
}
static void
DEFUN(coff_swap_scnhdr_in,(abfd, scnhdr_ext, scnhdr_int),
bfd *abfd AND
SCNHDR *scnhdr_ext AND
struct internal_scnhdr *scnhdr_int)
{
memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof(scnhdr_int->s_name));
scnhdr_int->s_vaddr = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_vaddr);
scnhdr_int->s_paddr = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_paddr);
scnhdr_int->s_size = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_size);
scnhdr_int->s_scnptr = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_scnptr);
scnhdr_int->s_relptr = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_relptr);
scnhdr_int->s_lnnoptr = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_lnnoptr);
scnhdr_int->s_flags = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_flags);
#if defined(M88)
scnhdr_int->s_nreloc = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_nreloc);
scnhdr_int->s_nlnno = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_nlnno);
#else
scnhdr_int->s_nreloc = bfd_h_get_16(abfd, (bfd_byte *) scnhdr_ext->s_nreloc);
scnhdr_int->s_nlnno = bfd_h_get_16(abfd, (bfd_byte *) scnhdr_ext->s_nlnno);
#endif
#ifdef I960
scnhdr_int->s_align = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_align);
#endif
}
static unsigned int
DEFUN(coff_swap_scnhdr_out,(abfd, in, out),
bfd *abfd AND
PTR in AND
PTR out)
{
struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *)in;
SCNHDR *scnhdr_ext = (SCNHDR *)out;
memcpy(scnhdr_ext->s_name, scnhdr_int->s_name, sizeof(scnhdr_int->s_name));
PUTWORD(abfd, scnhdr_int->s_vaddr, (bfd_byte *) scnhdr_ext->s_vaddr);
PUTWORD(abfd, scnhdr_int->s_paddr, (bfd_byte *) scnhdr_ext->s_paddr);
PUTWORD(abfd, scnhdr_int->s_size, (bfd_byte *) scnhdr_ext->s_size);
PUTWORD(abfd, scnhdr_int->s_scnptr, (bfd_byte *) scnhdr_ext->s_scnptr);
PUTWORD(abfd, scnhdr_int->s_relptr, (bfd_byte *) scnhdr_ext->s_relptr);
PUTWORD(abfd, scnhdr_int->s_lnnoptr, (bfd_byte *) scnhdr_ext->s_lnnoptr);
PUTWORD(abfd, scnhdr_int->s_flags, (bfd_byte *) scnhdr_ext->s_flags);
#if defined(M88)
PUTWORD(abfd, scnhdr_int->s_nlnno, (bfd_byte *) scnhdr_ext->s_nlnno);
PUTWORD(abfd, scnhdr_int->s_nreloc, (bfd_byte *) scnhdr_ext->s_nreloc);
#else
PUTHALF(abfd, scnhdr_int->s_nlnno, (bfd_byte *) scnhdr_ext->s_nlnno);
PUTHALF(abfd, scnhdr_int->s_nreloc, (bfd_byte *) scnhdr_ext->s_nreloc);
#endif
#if defined(I960)
PUTWORD(abfd, scnhdr_int->s_align, (bfd_byte *) scnhdr_ext->s_align);
#endif
return sizeof(SCNHDR);
}
/*
initialize a section structure with information peculiar to this
particular implementation of coff
*/
static boolean
DEFUN(coff_new_section_hook,(abfd_ignore, section),
bfd *abfd_ignore AND
asection *section)
{
section->alignment_power = abfd_ignore->xvec->align_power_min;
return true;
}
static asection bfd_debug_section =
{ "*DEBUG*" };
static void
DEFUN(make_abs_section,(abfd),
bfd *abfd)
{
}
/* Take a section header read from a coff file (in HOST byte order),
and make a BFD "section" out of it. */
static boolean
DEFUN(make_a_section_from_file,(abfd, hdr, target_index),
bfd *abfd AND
struct internal_scnhdr *hdr AND
unsigned int target_index)
{
asection *return_section;
char *name;
/* Assorted wastage to null-terminate the name, thanks AT&T! */
name = bfd_alloc(abfd, sizeof (hdr->s_name)+1);
if (name == NULL) {
bfd_error = no_memory;
return false;
}
strncpy(name, (char *) &hdr->s_name[0], sizeof (hdr->s_name));
name[sizeof (hdr->s_name)] = 0;
return_section = bfd_make_section(abfd, name);
if (return_section == NULL)
return false;
/* s_paddr is presumed to be = to s_vaddr */
return_section->vma = hdr->s_vaddr;
return_section->_raw_size = hdr->s_size;
return_section->filepos = hdr->s_scnptr;
return_section->rel_filepos = hdr->s_relptr;
return_section->reloc_count = hdr->s_nreloc;
#ifdef I960
/* FIXME, use a temp var rather than alignment_power */
return_section->alignment_power = hdr->s_align;
{
unsigned int i;
for (i = 0; i < 32; i++) {
if ((1 << i) >= (int) (return_section->alignment_power)) {
return_section->alignment_power = i;
break;
}
}
}
#endif
return_section->line_filepos = hdr->s_lnnoptr;
/*
return_section->linesize = hdr->s_nlnno * sizeof (struct lineno);
*/
return_section->lineno_count = hdr->s_nlnno;
return_section->userdata = NULL;
return_section->next = (asection *) NULL;
return_section->flags = styp_to_sec_flags(hdr->s_flags);
return_section->target_index = target_index;
if (hdr->s_nreloc != 0)
return_section->flags |= SEC_RELOC;
/* FIXME: should this check 'hdr->s_size > 0' */
if (hdr->s_scnptr != 0)
return_section->flags |= SEC_HAS_CONTENTS;
return true;
}
static boolean
DEFUN(coff_mkobject,(abfd),
bfd *abfd)
{
abfd->tdata.coff_obj_data = (struct coff_tdata *)bfd_zalloc (abfd,sizeof(coff_data_type));
if (abfd->tdata.coff_obj_data == 0){
bfd_error = no_memory;
return false;
}
coff_data(abfd)->relocbase = 0;
/* make_abs_section(abfd);*/
return true;
}
static
bfd_target *
DEFUN(coff_real_object_p,(abfd, nscns, internal_f, internal_a),
bfd *abfd AND
unsigned nscns AND
struct internal_filehdr *internal_f AND
struct internal_aouthdr *internal_a)
{
coff_data_type *coff;
enum bfd_architecture arch;
long machine;
size_t readsize; /* length of file_info */
SCNHDR *external_sections;
/* Build a play area */
if (coff_mkobject(abfd) != true)
return 0;
coff = coff_data(abfd);
external_sections = (SCNHDR *)bfd_alloc(abfd, readsize = (nscns * SCNHSZ));
if (bfd_read((PTR)external_sections, 1, readsize, abfd) != readsize) {
goto fail;
}
/* Now copy data as required; construct all asections etc */
coff->symbol_index_slew = 0;
coff->relocbase =0;
coff->raw_syment_count = 0;
coff->raw_linenos = 0;
coff->raw_syments = 0;
coff->sym_filepos =0;
coff->flags = internal_f->f_flags;
if (nscns != 0) {
unsigned int i;
for (i = 0; i < nscns; i++) {
struct internal_scnhdr tmp;
coff_swap_scnhdr_in(abfd, external_sections + i, &tmp);
make_a_section_from_file(abfd,&tmp, i+1);
}
}
/* make_abs_section(abfd);*/
/* Determine the machine architecture and type. */
machine = 0;
switch (internal_f->f_magic) {
#ifdef I386MAGIC
case I386MAGIC:
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 MIPS
case MIPS_MAGIC_1:
case MIPS_MAGIC_2:
case MIPS_MAGIC_3:
arch = bfd_arch_mips;
machine = 0;
break;
#endif
#ifdef MC68MAGIC
case MC68MAGIC:
case M68MAGIC:
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 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;
}
break;
#endif
#endif
#ifdef U802ROMAGIC
case U802ROMAGIC:
case U802WRMAGIC:
case U802TOCMAGIC:
arch = bfd_arch_rs6000;
machine = 6000;
break;
#endif
#ifdef H8300MAGIC
case H8300MAGIC:
arch = bfd_arch_h8300;
machine = 0;
break;
#endif
default: /* Unreadable input file type */
arch = bfd_arch_obscure;
break;
}
bfd_default_set_arch_mach(abfd, arch, machine);
if (!(internal_f->f_flags & F_RELFLG))
abfd->flags |= HAS_RELOC;
if ((internal_f->f_flags & F_EXEC))
abfd->flags |= EXEC_P;
if (!(internal_f->f_flags & F_LNNO))
abfd->flags |= HAS_LINENO;
if (!(internal_f->f_flags & F_LSYMS))
abfd->flags |= HAS_LOCALS;
bfd_get_symcount(abfd) = internal_f->f_nsyms;
if (internal_f->f_nsyms)
abfd->flags |= HAS_SYMS;
coff->sym_filepos = internal_f->f_symptr;
/* These members communicate important constants about the symbol table
to GDB's symbol-reading code. These `constants' unfortunately vary
from coff implementation to implementation... */
#ifndef NO_COFF_SYMBOLS
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;
#endif
coff->symbols = (coff_symbol_type *) NULL;
bfd_get_start_address(abfd) = internal_f->f_opthdr ? internal_a->entry : 0;
return abfd->xvec;
fail:
bfd_release(abfd, coff);
return (bfd_target *)NULL;
}
static bfd_target *
DEFUN(coff_object_p,(abfd),
bfd *abfd)
{
int nscns;
FILHDR filehdr;
AOUTHDR opthdr;
struct internal_filehdr internal_f;
struct internal_aouthdr internal_a;
bfd_error = system_call_error;
/* figure out how much to read */
if (bfd_read((PTR) &filehdr, 1, FILHSZ, abfd) != FILHSZ)
return 0;
bfd_swap_filehdr_in(abfd, &filehdr, &internal_f);
if (BADMAG(internal_f)) {
bfd_error = wrong_format;
return 0;
}
nscns =internal_f.f_nscns;
if (internal_f.f_opthdr) {
if (bfd_read((PTR) &opthdr, 1,AOUTSZ, abfd) != AOUTSZ) {
return 0;
}
bfd_swap_aouthdr_in(abfd, (char *)&opthdr, (char *)&internal_a);
}
/* Seek past the opt hdr stuff */
bfd_seek(abfd, internal_f.f_opthdr + FILHSZ, SEEK_SET);
/* if the optional header is NULL or not the correct size then
quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
and Intel 960 readwrite headers (I960WRMAGIC) is that the
optional header is of a different size.
But the mips keeps extra stuff in it's opthdr, so dont check
when doing that
*/
#if defined(M88) || defined(I960)
if (internal_f.f_opthdr != 0 && AOUTSZ != internal_f.f_opthdr)
return (bfd_target *)NULL;
#endif
return coff_real_object_p(abfd, nscns, &internal_f, &internal_a);
}
#ifndef NO_COFF_LINENOS
static void
DEFUN(coff_count_linenumbers,(abfd),
bfd *abfd)
{
unsigned int limit = bfd_get_symcount(abfd);
unsigned int i;
asymbol **p;
{
asection *s = abfd->sections->output_section;
while (s) {
BFD_ASSERT(s->lineno_count == 0);
s = s->next;
}
}
for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) {
asymbol *q_maybe = *p;
if (q_maybe->the_bfd->xvec->flavour == bfd_target_coff_flavour) {
coff_symbol_type *q = coffsymbol(q_maybe);
if (q->lineno) {
/*
This symbol has a linenumber, increment the owning
section's linenumber count
*/
alent *l = q->lineno;
q->symbol.section->output_section->lineno_count++;
l++;
while (l->line_number) {
q->symbol.section->output_section->lineno_count++;
l++;
}
}
}
}
}
#endif /* NO_COFF_LINENOS */
#ifndef NO_COFF_SYMBOLS
/*
Takes a bfd and a symbol, returns a pointer to the coff specific area
of the symbol if there is one.
*/
static coff_symbol_type *
DEFUN(coff_symbol_from,(ignore_abfd, symbol),
bfd *ignore_abfd AND
asymbol *symbol)
{
if (symbol->the_bfd->xvec->flavour != bfd_target_coff_flavour)
return (coff_symbol_type *)NULL;
if (symbol->the_bfd->tdata.coff_obj_data == (coff_data_type*)NULL)
return (coff_symbol_type *)NULL;
return (coff_symbol_type *) symbol;
}
static void
DEFUN(fixup_symbol_value,(coff_symbol_ptr, syment),
coff_symbol_type *coff_symbol_ptr AND
struct internal_syment *syment)
{
/* Normalize the symbol flags */
if (coff_symbol_ptr->symbol.section == &bfd_com_section) {
/* a common symbol is undefined with a value */
syment->n_scnum = N_UNDEF;
syment->n_value = coff_symbol_ptr->symbol.value;
}
else if (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) {
syment->n_value = coff_symbol_ptr->symbol.value;
}
else if (coff_symbol_ptr->symbol.section == & bfd_und_section) {
syment->n_scnum = N_UNDEF;
syment->n_value = 0;
}
else {
if (coff_symbol_ptr->symbol.section) {
syment->n_scnum =
coff_symbol_ptr->symbol.section->output_section->target_index;
syment->n_value =
coff_symbol_ptr->symbol.value +
coff_symbol_ptr->symbol.section->output_offset +
coff_symbol_ptr->symbol.section->output_section->vma;
}
else {
BFD_ASSERT(0);
/* This can happen, but I don't know why yet (steve@cygnus.com) */
syment->n_scnum = N_ABS;
syment->n_value = coff_symbol_ptr->symbol.value;
}
}
}
/* run through all the symbols in the symbol table and work out what
their indexes into the symbol table will be when output
Coff requires that each C_FILE symbol points to the next one in the
chain, and that the last one points to the first external symbol. We
do that here too.
*/
static void
DEFUN(coff_renumber_symbols,(bfd_ptr),
bfd *bfd_ptr)
{
unsigned int symbol_count = bfd_get_symcount(bfd_ptr);
asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
unsigned int native_index = 0;
struct internal_syment *last_file = (struct internal_syment *)NULL;
unsigned int symbol_index;
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
{
coff_symbol_type *coff_symbol_ptr = coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]);
if (coff_symbol_ptr && coff_symbol_ptr->native) {
combined_entry_type *s = coff_symbol_ptr->native;
int i;
if (s->u.syment.n_sclass == C_FILE)
{
if (last_file != (struct internal_syment *)NULL) {
last_file->n_value = native_index;
}
last_file = &(s->u.syment);
}
else {
/* Modify the symbol values according to their section and
type */
fixup_symbol_value(coff_symbol_ptr, &(s->u.syment));
}
for (i = 0; i < s->u.syment.n_numaux + 1; i++) {
s[i].offset = native_index ++;
}
}
else {
native_index++;
}
}
}
/*
Run thorough the symbol table again, and fix it so that all pointers to
entries are changed to the entries' index in the output symbol table.
*/
static void
DEFUN(coff_mangle_symbols,(bfd_ptr),
bfd *bfd_ptr)
{
unsigned int symbol_count = bfd_get_symcount(bfd_ptr);
asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
unsigned int symbol_index;
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
{
coff_symbol_type *coff_symbol_ptr =
coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]);
if (coff_symbol_ptr && coff_symbol_ptr->native) {
int i;
combined_entry_type *s = coff_symbol_ptr->native;
for (i = 0; i < s->u.syment.n_numaux ; i++) {
combined_entry_type *a = s + i + 1;
if (a->fix_tag) {
a->u.auxent.x_sym.x_tagndx.l =
a->u.auxent.x_sym.x_tagndx.p->offset;
a->fix_tag = 0;
}
if (a->fix_end) {
a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l =
a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset;
a->fix_end = 0;
}
}
}
}
}
static int string_size;
static void
DEFUN(coff_fix_symbol_name,(ignore_abfd, symbol, native),
bfd *ignore_abfd AND
asymbol *symbol AND
combined_entry_type *native)
{
unsigned int name_length;
union internal_auxent *auxent;
char * name = ( char *)(symbol->name);
if (name == (char *) NULL) {
/* coff symbols always have names, so we'll make one up */
symbol->name = "strange";
name = (char *)symbol->name;
}
name_length = strlen(name);
if (native->u.syment.n_sclass == C_FILE) {
strncpy(native->u.syment._n._n_name, ".file", SYMNMLEN);
auxent = &(native+1)->u.auxent;
#ifdef COFF_LONG_FILENAMES
if (name_length <= FILNMLEN) {
strncpy(auxent->x_file.x_fname, name, FILNMLEN);
}
else {
auxent->x_file.x_n.x_offset = string_size + 4;
auxent->x_file.x_n.x_zeroes = 0;
string_size += name_length + 1;
}
#else
strncpy(auxent->x_file.x_fname, name, FILNMLEN);
if (name_length > FILNMLEN) {
name[FILNMLEN] = '\0';
}
#endif
}
else
{ /* NOT A C_FILE SYMBOL */
if (name_length <= SYMNMLEN) {
/* This name will fit into the symbol neatly */
strncpy(native->u.syment._n._n_name, symbol->name, SYMNMLEN);
}
else {
native->u.syment._n._n_n._n_offset = string_size + 4;
native->u.syment._n._n_n._n_zeroes = 0;
string_size += name_length + 1;
}
}
}
static unsigned int
DEFUN(coff_write_symbol,(abfd, symbol, native, written),
bfd *abfd AND
asymbol *symbol AND
combined_entry_type *native AND
unsigned int written)
{
unsigned int numaux = native->u.syment.n_numaux;
int type = native->u.syment.n_type;
int class = native->u.syment.n_sclass;
SYMENT buf;
unsigned int j;
if (symbol->section == &bfd_abs_section)
{
native->u.syment.n_scnum = N_ABS;
}
else if (symbol->section == &bfd_debug_section)
{
native->u.syment.n_scnum = N_DEBUG;
}
else if (symbol->section == &bfd_und_section)
{
native->u.syment.n_scnum = N_UNDEF;
}
else
{
native->u.syment.n_scnum =
symbol->section->output_section->target_index;
}
coff_fix_symbol_name(abfd, symbol, native);
coff_swap_sym_out(abfd, &native->u.syment, &buf);
bfd_write((PTR)& buf, 1, SYMESZ, abfd);
for (j = 0; j < native->u.syment.n_numaux; j++)
{
AUXENT buf1;
bzero((PTR)&buf, AUXESZ);
coff_swap_aux_out(abfd,
&( (native + j + 1)->u.auxent), type, class, &buf1);
bfd_write((PTR) (&buf1), 1, AUXESZ, abfd);
}
/*
Reuse somewhere in the symbol to keep the index
*/
set_index(symbol, written);
return written + 1 + numaux;
}
static unsigned int
DEFUN(coff_write_alien_symbol,(abfd, symbol, written),
bfd *abfd AND
asymbol *symbol AND
unsigned int written)
{
/*
This symbol has been created by the loader, or come from a non
coff format. It has no native element to inherit, make our
own
*/
combined_entry_type *native;
combined_entry_type dummy;
native = &dummy;
native->u.syment.n_type = T_NULL;
#ifdef I960
native->u.syment.n_flags = 0;
#endif
if (symbol->section == &bfd_und_section)
{
native->u.syment.n_scnum = N_UNDEF;
native->u.syment.n_value = symbol->value;
}
else if (symbol->section == &bfd_com_section)
{
native->u.syment.n_scnum = N_UNDEF;
native->u.syment.n_value = symbol->value;
}
else if (symbol->flags & BSF_DEBUGGING) {
/*
remove name so it doesn't take up any space
*/
symbol->name = "";
}
else {
native->u.syment.n_scnum = symbol->section->output_section->target_index;
native->u.syment.n_value = symbol->value +
symbol->section->output_section->vma +
symbol->section->output_offset;
#ifdef I960
/* Copy the any flags from the the file hdr into the symbol */
{
coff_symbol_type *c = coff_symbol_from(abfd, symbol);
if (c != (coff_symbol_type *)NULL) {
native->u.syment.n_flags = c->symbol.the_bfd->flags;
}
}
#endif
}
#ifdef HASPAD1
native->u.syment.pad1[0] = 0;
native->u.syment.pad1[0] = 0;
#endif
native->u.syment.n_type = 0;
if (symbol->flags & BSF_LOCAL)
native->u.syment.n_sclass = C_STAT;
else
native->u.syment.n_sclass = C_EXT;
native->u.syment.n_numaux = 0;
return coff_write_symbol(abfd, symbol, native, written);
}
static unsigned int
DEFUN(coff_write_native_symbol,(abfd, symbol, written),
bfd *abfd AND
coff_symbol_type *symbol AND
unsigned int written)
{
/*
Does this symbol have an ascociated line number - if so then
make it remember this symbol index. Also tag the auxent of
this symbol to point to the right place in the lineno table
*/
combined_entry_type *native = symbol->native;
alent *lineno = symbol->lineno;
if (lineno && !symbol->done_lineno) {
unsigned int count = 0;
lineno[count].u.offset = written;
if (native->u.syment.n_numaux) {
union internal_auxent *a = &((native+1)->u.auxent);
a->x_sym.x_fcnary.x_fcn.x_lnnoptr =
symbol->symbol.section->output_section->moving_line_filepos;
}
/*
And count and relocate all other linenumbers
*/
count++;
while (lineno[count].line_number) {
#if 0
/* 13 april 92. sac
I've been told this, but still need proof:
> The second bug is also in `bfd/coffcode.h'. This bug causes the linker to screw
> up the pc-relocations for all the line numbers in COFF code. This bug isn't
> only specific to A29K implementations, but affects all systems using COFF
> format binaries. Note that in COFF object files, the line number core offsets
> output by the assembler are relative to the start of each procedure, not
> to the start of the .text section. This patch relocates the line numbers
> relative to the `native->u.syment.n_value' instead of the section virtual
> address. modular!olson@cs.arizona.edu (Jon Olson)
*/
lineno[count].u.offset += native->u.syment.n_value;
#else
lineno[count].u.offset +=
symbol->symbol.section->output_section->vma +
symbol->symbol.section->output_offset;
#endif
count++;
}
symbol->done_lineno = true;
symbol->symbol.section->output_section->moving_line_filepos +=
count * LINESZ;
}
return coff_write_symbol(abfd, &( symbol->symbol), native,written);
}
static void
DEFUN(coff_write_symbols,(abfd),
bfd *abfd)
{
unsigned int i;
unsigned int limit = bfd_get_symcount(abfd);
unsigned int written = 0;
asymbol **p;
string_size = 0;
/* Seek to the right place */
bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET);
/* Output all the symbols we have */
written = 0;
for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
{
asymbol *symbol = *p;
coff_symbol_type *c_symbol = coff_symbol_from(abfd, symbol);
if (c_symbol == (coff_symbol_type *) NULL ||
c_symbol->native == (combined_entry_type *)NULL)
{
written = coff_write_alien_symbol(abfd, symbol, written);
}
else
{
written = coff_write_native_symbol(abfd, c_symbol, written);
}
}
bfd_get_symcount(abfd) = written;
/* Now write out strings */
if (string_size != 0)
{
unsigned int size = string_size + 4;
bfd_byte buffer[4];
bfd_h_put_32(abfd, size, buffer);
bfd_write((PTR) buffer, 1, sizeof(buffer), abfd);
for (p = abfd->outsymbols, i = 0;
i < limit;
i++, p++)
{
asymbol *q = *p;
size_t name_length = strlen(q->name);
int maxlen;
coff_symbol_type* c_symbol = coff_symbol_from(abfd, q);
maxlen = ((c_symbol != NULL && c_symbol->native != NULL) &&
(c_symbol->native->u.syment.n_sclass == C_FILE)) ?
FILNMLEN : SYMNMLEN;
if (name_length > maxlen) {
bfd_write((PTR) (q->name), 1, name_length + 1, abfd);
}
}
}
else {
/* We would normally not write anything here, but we'll write
out 4 so that any stupid coff reader which tries to read
the string table even when there isn't one won't croak.
*/
uint32e_type size = 4;
size = size;
bfd_write((PTR)&size, 1, sizeof(size), abfd);
}
}
/*
SUBSUBSECTION
Writing Relocations
To write relocations, all the back end does is step though the
canonical relocation table, and create an
@code{internal_reloc}. The symbol index to use is removed from
the @code{offset} field in the symbol table supplied, the
address comes directly from the sum of the section base
address and the relocation offset and the type is dug directly
from the howto field. Then the @code{internal_reloc} is
swapped into the shape of an @code{external_reloc} and written
out to disk.
*/
static void
DEFUN(coff_write_relocs,(abfd),
bfd *abfd)
{
asection *s;
for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
unsigned int i;
struct external_reloc dst;
arelent **p = s->orelocation;
bfd_seek(abfd, s->rel_filepos, SEEK_SET);
for (i = 0; i < s->reloc_count; i++) {
struct internal_reloc n;
arelent *q = p[i];
memset((PTR)&n, 0, sizeof(n));
n.r_vaddr = q->address + s->vma;
if (q->sym_ptr_ptr) {
n.r_symndx = get_index((*(q->sym_ptr_ptr)));
}
#ifdef SELECT_RELOC
/* Work out reloc type from what is required */
SELECT_RELOC(n.r_type, q->howto);
#else
n.r_type = q->howto->type;
#endif
coff_swap_reloc_out(abfd, &n, &dst);
bfd_write((PTR) &n, 1, RELSZ, abfd);
}
}
}
#endif /* NO_COFF_SYMBOLS */
#ifndef NO_COFF_LINENOS
static void
DEFUN(coff_write_linenumbers,(abfd),
bfd *abfd)
{
asection *s;
for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
if (s->lineno_count) {
asymbol **q = abfd->outsymbols;
bfd_seek(abfd, s->line_filepos, SEEK_SET);
/* Find all the linenumbers in this section */
while (*q) {
asymbol *p = *q;
alent *l = BFD_SEND(p->the_bfd, _get_lineno, (p->the_bfd, p));
if (l) {
/* Found a linenumber entry, output */
struct internal_lineno out;
LINENO buff;
memset( (PTR)&out, 0, sizeof(out));
out.l_lnno = 0;
out.l_addr.l_symndx = l->u.offset;
coff_swap_lineno_out(abfd, &out, &buff);
bfd_write((PTR) &buff, 1, LINESZ, abfd);
l++;
while (l->line_number) {
out.l_lnno = l->line_number;
out.l_addr.l_symndx = l->u.offset;
coff_swap_lineno_out(abfd, &out, &buff);
bfd_write((PTR) &buff, 1, LINESZ, abfd);
l++;
}
}
q++;
}
}
}
}
static alent *
DEFUN(coff_get_lineno,(ignore_abfd, symbol),
bfd *ignore_abfd AND
asymbol *symbol)
{
return coffsymbol(symbol)->lineno;
}
#endif /* NO_COFF_LINENOS */
static asymbol *
coff_make_empty_symbol(abfd)
bfd *abfd;
{
coff_symbol_type *new = (coff_symbol_type *) bfd_alloc(abfd, sizeof(coff_symbol_type));
if (new == NULL) {
bfd_error = no_memory;
return (NULL);
} /* on error */
new->native = 0;
new->lineno = (alent *) NULL;
new->done_lineno = false;
new->symbol.the_bfd = abfd;
return &new->symbol;
}
#ifndef NO_COFF_SYMBOLS
static void
DEFUN(coff_print_symbol,(ignore_abfd, filep, symbol, how),
bfd *ignore_abfd AND
PTR filep AND
asymbol *symbol AND
bfd_print_symbol_type how)
{
FILE *file = (FILE *)filep;
switch (how) {
case bfd_print_symbol_name:
fprintf(file, "%s", symbol->name);
break;
case bfd_print_symbol_more:
fprintf(file, "coff %lx %lx", (unsigned long) coffsymbol(symbol)->native,
(unsigned long) coffsymbol(symbol)->lineno);
break;
case bfd_print_symbol_nm:
{
CONST char *section_name = symbol->section->name;
bfd_print_symbol_vandf((PTR) file, symbol);
fprintf(file, " %-5s %s %s %s",
section_name,
coffsymbol(symbol)->native ? "n" : "g",
coffsymbol(symbol)->lineno ? "l" : " ",
symbol->name);
}
break;
case bfd_print_symbol_all:
/* Print out the symbols in a reasonable way */
{
CONST char *section_name = symbol->section->name;
if (coffsymbol(symbol)->native)
{
unsigned int aux;
combined_entry_type *combined = coffsymbol(symbol)->native;
combined_entry_type *root = obj_raw_syments(ignore_abfd);
fprintf(file,"[%3d]",
combined - root);
fprintf(file, "(sc %2d)(fl%4x)(ty%3x)(sc%3d) nx(%d) %08x %s",
combined->u.syment.n_scnum,
combined->u.syment.n_flags,
combined->u.syment.n_type,
combined->u.syment.n_sclass,
combined->u.syment.n_numaux,
combined->u.syment.n_value,
symbol->name
);
for (aux = 0; aux < combined->u.syment.n_numaux; aux++)
{
fprintf(file,"\n");
switch (combined->u.syment.n_sclass) {
case C_FILE:
fprintf(file, "File ");
break;
default:
fprintf(file, "AUX lnno %x size %x tagndx %x",
combined[aux+1].u.auxent.x_sym.x_misc.x_lnsz.x_lnno,
combined[aux+1].u.auxent.x_sym.x_misc.x_lnsz.x_size,
combined[aux+1].u.auxent.x_sym.x_tagndx.l);
break;
}
}
{
struct lineno_cache_entry *l = coffsymbol(symbol)->lineno;
if (l)
{
printf("\n%s :", l->u.sym->name);
l++;
while (l->line_number)
{
printf("\n%4d : %x",
l->line_number,
l->u.offset);
l++;
}
}
}
}
else {
bfd_print_symbol_vandf((PTR) file, symbol);
fprintf(file, " %-5s %s %s %s",
section_name,
coffsymbol(symbol)->native ? "n" : "g",
coffsymbol(symbol)->lineno ? "l" : " ",
symbol->name);
}
}
}
}
#endif /* NO_COFF_SYMBOLS */
/* Set flags and magic number of a coff file from architecture and machine
type. Result is true if we can represent the arch&type, false if not. */
static boolean
DEFUN(coff_set_flags,(abfd, magicp, flagsp),
bfd *abfd AND
unsigned *magicp AND
unsigned short *flagsp)
{
switch (bfd_get_arch(abfd)) {
#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;
default:
return false;
}
*flagsp = flags;
return true;
}
break;
#endif
#ifdef MIPS
case bfd_arch_mips:
*magicp = MIPS_MAGIC_2;
return true;
break;
#endif
#ifdef I386MAGIC
case bfd_arch_i386:
*magicp = I386MAGIC;
return true;
#endif
#ifdef MC68MAGIC
case bfd_arch_m68k:
*magicp = MC68MAGIC;
return true;
#endif
#ifdef MC88MAGIC
case bfd_arch_m88k:
*magicp = MC88OMAGIC;
return true;
break;
#endif
#ifdef H8300MAGIC
case bfd_arch_h8300:
*magicp = H8300MAGIC;
return true;
break;
#endif
#ifdef A29K_MAGIC_BIG
case bfd_arch_a29k:
if (abfd->xvec->byteorder_big_p)
*magicp = A29K_MAGIC_BIG;
else
*magicp = A29K_MAGIC_LITTLE;
return true;
break;
#endif
#ifdef U802TOCMAGIC
case bfd_arch_rs6000:
*magicp = U802TOCMAGIC;
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
DEFUN(coff_set_arch_mach,(abfd, arch, machine),
bfd *abfd AND
enum bfd_architecture arch AND
unsigned long machine)
{
unsigned dummy1;
unsigned short dummy2;
bfd_default_set_arch_mach(abfd, arch, machine);
if (arch != bfd_arch_unknown &&
coff_set_flags(abfd, &dummy1, &dummy2) != true)
return false; /* We can't represent this type */
return true; /* We're easy ... */
}
/* Calculate the file position for each section. */
static void
DEFUN(coff_compute_section_file_positions,(abfd),
bfd *abfd)
{
asection *current;
asection *previous = (asection *)NULL;
file_ptr sofar = FILHSZ;
file_ptr old_sofar;
if (bfd_get_start_address(abfd))
{
/* A start address may have been added to the original file. In this
case it will need an optional header to record it. */
abfd->flags |= EXEC_P;
}
if (abfd->flags & EXEC_P)
sofar += AOUTSZ;
sofar += abfd->section_count * SCNHSZ;
for (current = abfd->sections;
current != (asection *)NULL;
current = current->next) {
/* Only deal with sections which have contents */
if (!(current->flags & SEC_HAS_CONTENTS))
continue;
/* Align the sections in the file to the same boundary on
which they are aligned in virtual memory. I960 doesn't
do this (FIXME) so we can stay in sync with Intel. 960
doesn't yet page from files... */
#ifndef I960
{
/* 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
/* FIXME, in demand paged files, the low order bits of the file
offset must match the low order bits of the virtual address.
"Low order" is apparently implementation defined. Add code
here to round sofar up to match the virtual address. */
current->filepos = sofar;
/* make sure that this section is of the right size too */
old_sofar = sofar += current->_raw_size;
sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
current->_raw_size += sofar - old_sofar ;
previous = current;
}
obj_relocbase(abfd) = sofar;
}
/* SUPPRESS 558 */
/* SUPPRESS 529 */
static boolean
DEFUN(coff_write_object_contents,(abfd),
bfd *abfd)
{
asection *current;
unsigned int count;
boolean hasrelocs = false;
boolean haslinno = false;
file_ptr reloc_base;
file_ptr lineno_base;
file_ptr sym_base;
file_ptr scn_base;
file_ptr data_base;
unsigned long reloc_size = 0;
unsigned long lnno_size = 0;
asection *text_sec = NULL;
asection *data_sec = NULL;
asection *bss_sec = NULL;
struct internal_filehdr internal_f;
struct internal_aouthdr internal_a;
bfd_error = system_call_error;
/* Number the output sections, starting from one on the first section
with a name which doesn't start with a * */
count = 1;
for (current = abfd->sections; current != (asection *)NULL;
current = current->next)
{
current->target_index = count;
}
if(abfd->output_has_begun == false) {
coff_compute_section_file_positions(abfd);
}
if (abfd->sections != (asection *)NULL) {
scn_base = abfd->sections->filepos;
}
else {
scn_base = 0;
}
if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
return false;
reloc_base = obj_relocbase(abfd);
/* Make a pass through the symbol table to count line number entries and
put them into the correct asections */
#ifndef NO_COFF_LINENOS
coff_count_linenumbers(abfd);
#endif
data_base = scn_base;
/* Work out the size of the reloc and linno areas */
for (current = abfd->sections; current != NULL; current =
current->next)
{
/* We give section headers to +ve indexes */
if (current->target_index > 0)
{
reloc_size += current->reloc_count * RELSZ;
#ifndef NO_COFF_LINENOS
lnno_size += current->lineno_count * LINESZ;
#endif
data_base += SCNHSZ;
}
}
lineno_base = reloc_base + reloc_size;
sym_base = lineno_base + lnno_size;
/* Indicate in each section->line_filepos its actual file address */
for (current = abfd->sections; current != NULL; current =
current->next)
{
if (current->target_index > 0)
{
if (current->lineno_count) {
current->line_filepos = lineno_base;
current->moving_line_filepos = lineno_base;
#ifndef NO_COFF_LINENOS
lineno_base += current->lineno_count * LINESZ;
#endif
}
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;
bfd_seek(abfd,
(file_ptr) ((abfd->flags & EXEC_P) ?
(FILHSZ + AOUTSZ) : FILHSZ),
SEEK_SET);
{
#if 0
unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
#endif
unsigned int pad = 0;
for (current = abfd->sections;
current != NULL;
current = current->next) {
struct internal_scnhdr section;
if (current->target_index > 0)
{
internal_f.f_nscns ++;
strncpy(&(section.s_name[0]), current->name, 8);
section.s_vaddr = current->vma + pad;
section.s_paddr = current->vma + pad;
section.s_size = current->_raw_size - pad;
/*
If this section has no size or is unloadable then the scnptr
will be 0 too
*/
if (current->_raw_size - pad == 0 ||
(current->flags & SEC_LOAD) == 0) {
section.s_scnptr = 0;
}
else {
section.s_scnptr = current->filepos;
}
section.s_relptr = current->rel_filepos;
section.s_lnnoptr = current->line_filepos;
section.s_nreloc = current->reloc_count;
section.s_nlnno = current->lineno_count;
if (current->reloc_count != 0)
hasrelocs = true;
if (current->lineno_count != 0)
haslinno = true;
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
{
SCNHDR buff;
coff_swap_scnhdr_out(abfd, &section, &buff);
bfd_write((PTR) (&buff), 1, SCNHSZ, abfd);
}
pad = 0;
}
}
}
/* 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
*/
/*
Well, I like it, and now we have *customers* who have requested it,
so I'm conditionally compiling it in.
sac@cygnus.com
*/
#ifndef NOCOFF_TIMESTAMP
internal_f.f_timdat = time(0);
#else
internal_f.f_timdat = 0;
#endif
if (bfd_get_symcount(abfd) != 0)
internal_f.f_symptr = sym_base;
else
internal_f.f_symptr = 0;
internal_f.f_flags = 0;
if (abfd->flags & EXEC_P)
internal_f.f_opthdr = AOUTSZ;
else
internal_f.f_opthdr = 0;
if (!hasrelocs)
internal_f.f_flags |= F_RELFLG;
if (!haslinno)
internal_f.f_flags |= F_LNNO;
if (0 == bfd_get_symcount(abfd))
internal_f.f_flags |= F_LSYMS;
if (abfd->flags & EXEC_P)
internal_f.f_flags |= F_EXEC;
if (!abfd->xvec->byteorder_big_p)
internal_f.f_flags |= F_AR32WR;
else
internal_f.f_flags |= F_AR32W;
/*
FIXME, should do something about the other byte orders and
architectures.
*/
/* 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 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 M68 || I386 || MIPS
#define __A_MAGIC_SET__
/* Never was anything here for the 68k */
#endif /* M88 */
#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
}
/* Now should write relocs, strings, syms */
obj_sym_filepos(abfd) = sym_base;
#ifndef NO_COFF_SYMBOLS
if (bfd_get_symcount(abfd) != 0) {
coff_renumber_symbols(abfd);
coff_mangle_symbols(abfd);
coff_write_symbols(abfd);
coff_write_linenumbers(abfd);
coff_write_relocs(abfd);
}
#endif /* NO_COFF_SYMBOLS */
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);
}
internal_a.entry = bfd_get_start_address(abfd);
internal_f.f_nsyms = bfd_get_symcount(abfd);
/* now write them */
if (bfd_seek(abfd, 0L, SEEK_SET) != 0)
return false;
{
FILHDR buff;
coff_swap_filehdr_out(abfd, (PTR)&internal_f, (PTR)&buff);
bfd_write((PTR) &buff, 1, FILHSZ, abfd);
}
if (abfd->flags & EXEC_P) {
AOUTHDR buff;
coff_swap_aouthdr_out(abfd, (PTR)&internal_a, (PTR)&buff);
bfd_write((PTR) &buff, 1, AOUTSZ, abfd);
}
return true;
}
#ifndef NO_COFF_SYMBOLS
/*
this function transforms the offsets into the symbol table into
pointers to syments.
*/
static void
DEFUN(coff_pointerize_aux,(ignore_abfd, table_base, type, class, auxent),
bfd *ignore_abfd AND
combined_entry_type *table_base AND
int type AND
int class AND
combined_entry_type *auxent)
{
/* Don't bother if this is a file or a section */
if (class == C_STAT && type == T_NULL) return;
if (class == C_FILE) return;
/* Otherwise patch up */
if (ISFCN(type) || ISTAG(class) || class == C_BLOCK) {
auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = table_base +
auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
auxent->fix_end = 1;
}
if (auxent->u.auxent.x_sym.x_tagndx.l != 0) {
auxent->u.auxent.x_sym.x_tagndx.p =
table_base + auxent->u.auxent.x_sym.x_tagndx.l;
auxent->fix_tag = 1;
}
}
#endif /* NO_COFF_SYMBOLS */
static boolean
DEFUN(coff_set_section_contents,(abfd, section, location, offset, count),
bfd *abfd AND
sec_ptr section AND
PTR location AND
file_ptr offset AND
bfd_size_type count)
{
if (abfd->output_has_begun == false) /* set by bfd.c handler */
coff_compute_section_file_positions(abfd);
bfd_seek(abfd, (file_ptr) (section->filepos + offset), SEEK_SET);
if (count != 0) {
return (bfd_write(location, 1, count, abfd) == count) ? true : false;
}
return true;
}
#if 0
static boolean
coff_close_and_cleanup(abfd)
bfd *abfd;
{
if (!bfd_read_p(abfd))
switch (abfd->format) {
case bfd_archive:
if (!_bfd_write_archive_contents(abfd))
return false;
break;
case bfd_object:
if (!coff_write_object_contents(abfd))
return false;
break;
default:
bfd_error = invalid_operation;
return false;
}
/* We depend on bfd_close to free all the memory on the obstack. */
/* FIXME if bfd_release is not using obstacks! */
return true;
}
#endif
static PTR
buy_and_read(abfd, where, seek_direction, size)
bfd *abfd;
file_ptr where;
int seek_direction;
size_t size;
{
PTR area = (PTR) bfd_alloc(abfd, size);
if (!area) {
bfd_error = no_memory;
return (NULL);
}
bfd_seek(abfd, where, seek_direction);
if (bfd_read(area, 1, size, abfd) != size) {
bfd_error = system_call_error;
return (NULL);
} /* on error */
return (area);
} /* buy_and_read() */
#ifndef NO_COFF_SYMBOLS
static char *
DEFUN(build_string_table,(abfd),
bfd *abfd)
{
char string_table_size_buffer[4];
unsigned int string_table_size;
char *string_table;
/* At this point we should be "seek"'d to the end of the
symbols === the symbol table size. */
if (bfd_read((char *) string_table_size_buffer,
sizeof(string_table_size_buffer),
1, abfd) != sizeof(string_table_size)) {
bfd_error = system_call_error;
return (NULL);
} /* on error */
string_table_size = bfd_h_get_32(abfd, (bfd_byte *) string_table_size_buffer);
if ((string_table = (PTR) bfd_alloc(abfd, string_table_size -= 4)) == NULL) {
bfd_error = no_memory;
return (NULL);
} /* on mallocation error */
if (bfd_read(string_table, string_table_size, 1, abfd) != string_table_size) {
bfd_error = system_call_error;
return (NULL);
}
return string_table;
}
/* Allocate space for the ".debug" section, and read it.
We did not read the debug section until now, because
we didn't want to go to the trouble until someone needed it. */
static char *
DEFUN(build_debug_section,(abfd),
bfd *abfd)
{
char *debug_section;
long position;
asection *sect = bfd_get_section_by_name (abfd, ".debug");
if (!sect) {
bfd_error = no_debug_section;
return NULL;
}
debug_section = (PTR) bfd_alloc (abfd,
bfd_get_section_size_before_reloc (sect));
if (debug_section == NULL) {
bfd_error = no_memory;
return NULL;
}
/* Seek to the beginning of the `.debug' section and read it.
Save the current position first; it is needed by our caller.
Then read debug section and reset the file pointer. */
position = bfd_tell (abfd);
bfd_seek (abfd, sect->filepos, SEEK_SET);
if (bfd_read (debug_section,
bfd_get_section_size_before_reloc (sect), 1, abfd)
!= bfd_get_section_size_before_reloc(sect)) {
bfd_error = system_call_error;
return NULL;
}
bfd_seek (abfd, position, SEEK_SET);
return debug_section;
}
/* Return a pointer to a malloc'd copy of 'name'. 'name' may not be
\0-terminated, but will not exceed 'maxlen' characters. The copy *will*
be \0-terminated. */
static char *
DEFUN(copy_name,(abfd, name, maxlen),
bfd *abfd AND
char *name AND
int maxlen)
{
int len;
char *newname;
for (len = 0; len < maxlen; ++len) {
if (name[len] == '\0') {
break;
}
}
if ((newname = (PTR) bfd_alloc(abfd, len+1)) == NULL) {
bfd_error = no_memory;
return (NULL);
}
strncpy(newname, name, len);
newname[len] = '\0';
return newname;
}
/* Read a symbol table into freshly bfd_allocated memory, swap it, and
knit the symbol names into a normalized form. By normalized here I
mean that all symbols have an n_offset pointer that points to a null-
terminated string. */
#ifndef SYMNAME_IN_DEBUG
#define SYMNAME_IN_DEBUG(x) 0
#endif
static combined_entry_type *
DEFUN(get_normalized_symtab,(abfd),
bfd *abfd)
{
combined_entry_type *internal;
combined_entry_type *internal_ptr;
combined_entry_type *symbol_ptr;
combined_entry_type *internal_end;
SYMENT *raw;
SYMENT *raw_src;
SYMENT *raw_end;
char *string_table = NULL;
char *debug_section = NULL;
unsigned long size;
unsigned int raw_size;
if (obj_raw_syments(abfd) != (combined_entry_type *)NULL) {
return obj_raw_syments(abfd);
}
if ((size = bfd_get_symcount(abfd) * sizeof(combined_entry_type)) == 0) {
bfd_error = no_symbols;
return (NULL);
}
internal = (combined_entry_type *)bfd_alloc(abfd, size);
internal_end = internal + bfd_get_symcount(abfd);
raw_size = bfd_get_symcount(abfd) * SYMESZ;
raw = (SYMENT *)bfd_alloc(abfd,raw_size);
if (bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET) == -1
|| bfd_read((PTR)raw, raw_size, 1, abfd) != raw_size) {
bfd_error = system_call_error;
return (NULL);
}
/* mark the end of the symbols */
raw_end = raw + bfd_get_symcount(abfd);
/*
FIXME SOMEDAY. A string table size of zero is very weird, but
probably possible. If one shows up, it will probably kill us.
*/
/* Swap all the raw entries */
for (raw_src = raw, internal_ptr = internal;
raw_src < raw_end;
raw_src++, internal_ptr++) {
unsigned int i;
coff_swap_sym_in(abfd, (PTR)raw_src, (PTR)&internal_ptr->u.syment);
internal_ptr->fix_tag = 0;
internal_ptr->fix_end = 0;
symbol_ptr = internal_ptr;
for (i = 0;
i < symbol_ptr->u.syment.n_numaux;
i++)
{
internal_ptr++;
raw_src++;
internal_ptr->fix_tag = 0;
internal_ptr->fix_end = 0;
coff_swap_aux_in(abfd, (char *)(raw_src),
symbol_ptr->u.syment.n_type,
symbol_ptr->u.syment.n_sclass,
&(internal_ptr->u.auxent));
/* Remember that bal entries arn't pointerized */
if (i != 1 || symbol_ptr->u.syment.n_sclass != C_LEAFPROC)
{
coff_pointerize_aux(abfd,
internal,
symbol_ptr->u.syment.n_type,
symbol_ptr->u.syment.n_sclass,
internal_ptr);
}
}
}
/* Free all the raw stuff */
bfd_release(abfd, raw);
for (internal_ptr = internal; internal_ptr < internal_end;
internal_ptr ++)
{
if (internal_ptr->u.syment.n_sclass == C_FILE) {
/* make a file symbol point to the name in the auxent, since
the text ".file" is redundant */
if ((internal_ptr+1)->u.auxent.x_file.x_n.x_zeroes == 0) {
/* the filename is a long one, point into the string table */
if (string_table == NULL) {
string_table = build_string_table(abfd);
}
internal_ptr->u.syment._n._n_n._n_offset =
(int) (string_table - 4 +
(internal_ptr+1)->u.auxent.x_file.x_n.x_offset);
}
else {
/* ordinary short filename, put into memory anyway */
internal_ptr->u.syment._n._n_n._n_offset = (int)
copy_name(abfd, (internal_ptr+1)->u.auxent.x_file.x_fname,
FILNMLEN);
}
}
else {
if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) {
/* This is a "short" name. Make it long. */
unsigned long i = 0;
char *newstring = NULL;
/* find the length of this string without walking into memory
that isn't ours. */
for (i = 0; i < 8; ++i) {
if (internal_ptr->u.syment._n._n_name[i] == '\0') {
break;
} /* if end of string */
} /* possible lengths of this string. */
if ((newstring = (PTR) bfd_alloc(abfd, ++i)) == NULL) {
bfd_error = no_memory;
return (NULL);
} /* on error */
bzero(newstring, i);
strncpy(newstring, internal_ptr->u.syment._n._n_name, i-1);
internal_ptr->u.syment._n._n_n._n_offset = (int) newstring;
internal_ptr->u.syment._n._n_n._n_zeroes = 0;
}
else if (!SYMNAME_IN_DEBUG(&internal_ptr->u.syment)) {
/* Long name already. Point symbol at the string in the table. */
if (string_table == NULL) {
string_table = build_string_table(abfd);
}
internal_ptr->u.syment._n._n_n._n_offset = (int)
(string_table - 4 + internal_ptr->u.syment._n._n_n._n_offset);
}
else {
/* Long name in debug section. Very similar. */
if (debug_section == NULL) {
debug_section = build_debug_section(abfd);
}
internal_ptr->u.syment._n._n_n._n_offset = (int)
(debug_section + internal_ptr->u.syment._n._n_n._n_offset);
}
}
internal_ptr += internal_ptr->u.syment.n_numaux;
}
obj_raw_syments(abfd) = internal;
return (internal);
} /* get_normalized_symtab() */
#endif /* NO_COFF_SYMBOLS */
static
struct sec *
DEFUN(section_from_bfd_index,(abfd, index),
bfd *abfd AND
int index)
{
struct sec *answer = abfd->sections;
if (index == N_ABS)
{
return &bfd_abs_section;
}
if (index == N_UNDEF)
{
return &bfd_und_section;
}
if(index == N_DEBUG)
{
return &bfd_debug_section;
}
while (answer) {
if (answer->target_index == index)
return answer;
answer = answer->next;
}
BFD_ASSERT(0);
return &bfd_und_section; /* For gcc -W and lint. Never executed. */
}
#ifndef NO_COFF_LINENOS
/*
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 line number table is structured so that each function
is marked as having a line number of 0. Each line within the
function is an offset from the first line in the function. The
base of the line number information for the table is stored in
the symbol associated with the function.
The information is copied from the external to the internal
table, and each symbol which marks a function is marked by
pointing its...
How does this work ?
*/
static boolean
coff_slurp_line_table(abfd, asect)
bfd *abfd;
asection *asect;
{
LINENO *native_lineno;
alent *lineno_cache;
BFD_ASSERT(asect->lineno == (alent *) NULL);
native_lineno = (LINENO *) buy_and_read(abfd,
asect->line_filepos,
SEEK_SET,
(size_t) (LINESZ *
asect->lineno_count));
lineno_cache =
(alent *) bfd_alloc(abfd, (size_t) ((asect->lineno_count + 1) * sizeof(alent)));
if (lineno_cache == NULL) {
bfd_error = no_memory;
return false;
} else {
unsigned int counter = 0;
alent *cache_ptr = lineno_cache;
LINENO *src = native_lineno;
while (counter < asect->lineno_count) {
struct internal_lineno dst;
coff_swap_lineno_in(abfd, src, &dst);
cache_ptr->line_number = dst.l_lnno;
if (cache_ptr->line_number == 0) {
coff_symbol_type *sym =
(coff_symbol_type *) (dst.l_addr.l_symndx
+ obj_raw_syments(abfd))->u.syment._n._n_n._n_zeroes;
cache_ptr->u.sym = (asymbol *) sym;
sym->lineno = cache_ptr;
}
else {
cache_ptr->u.offset = dst.l_addr.l_paddr
- bfd_section_vma(abfd, asect);
} /* If no linenumber expect a symbol index */
cache_ptr++;
src++;
counter++;
}
cache_ptr->line_number = 0;
}
asect->lineno = lineno_cache;
/* FIXME, free native_lineno here, or use alloca or something. */
return true;
} /* coff_slurp_line_table() */
#endif /* NO_COFF_LINENOS */
#ifndef NO_COFF_LINENOS
static boolean
DEFUN(coff_slurp_symbol_table,(abfd),
bfd *abfd)
{
combined_entry_type *native_symbols;
coff_symbol_type *cached_area;
unsigned int *table_ptr;
unsigned int number_of_symbols = 0;
if (obj_symbols(abfd))
return true;
bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET);
/* Read in the symbol table */
if ((native_symbols = get_normalized_symtab(abfd)) == NULL) {
return (false);
} /* on error */
/* Allocate enough room for all the symbols in cached form */
cached_area =
(coff_symbol_type *)
bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(coff_symbol_type)));
if (cached_area == NULL) {
bfd_error = no_memory;
return false;
} /* on error */
table_ptr =
(unsigned int *)
bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(unsigned int)));
if (table_ptr == NULL) {
bfd_error = no_memory;
return false;
}
else
{
coff_symbol_type *dst = cached_area;
unsigned int last_native_index = bfd_get_symcount(abfd);
unsigned int this_index = 0;
while (this_index < last_native_index) {
combined_entry_type *src = native_symbols + this_index;
table_ptr[this_index] = number_of_symbols;
dst->symbol.the_bfd = abfd;
dst->symbol.name = (char *)(src->u.syment._n._n_n._n_offset);
/*
We use the native name field to point to the cached field
*/
src->u.syment._n._n_n._n_zeroes = (int) dst;
dst->symbol.section = section_from_bfd_index(abfd,
src->u.syment.n_scnum);
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;
#endif
/* Fall through to next case */
#endif
case C_EXT:
#ifdef RS6000COFF_C
case C_HIDEXT:
#endif
if ((src->u.syment.n_scnum) == 0) {
if ((src->u.syment.n_value) == 0) {
dst->symbol.section = &bfd_und_section;
dst->symbol.value= 0;
}
else {
dst->symbol.section = &bfd_com_section;
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;
}
}
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_BINCL: /* beginning of include file */
case C_EINCL: /* ending of include file */
case C_GSYM:
case C_LSYM:
case C_PSYM:
case C_RSYM:
case C_RPSYM:
case C_STSYM:
case C_DECL:
case C_ENTRY:
case C_FUN:
case C_BSTAT:
case C_ESTAT:
#endif
dst->symbol.flags = BSF_DEBUGGING;
dst->symbol.value = (src->u.syment.n_value);
break;
case C_BLOCK: /* ".bb" or ".eb" */
case C_FCN: /* ".bf" or ".ef" */
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 */
case C_LINE: /* line # reformatted as symbol table entry */
case C_ALIAS: /* duplicate tag */
case C_HIDDEN: /* ext symbol in dmert public lib */
default:
fprintf(stderr,"Unrecognized storage class %d\n",
src->u.syment.n_sclass);
abort();
dst->symbol.flags = BSF_DEBUGGING;
dst->symbol.value = (src->u.syment.n_value);
break;
}
/* BFD_ASSERT(dst->symbol.flags != 0);*/
dst->native = src;
dst->symbol.udata = 0;
dst->lineno = (alent *) NULL;
this_index += (src->u.syment.n_numaux) + 1;
dst++;
number_of_symbols++;
} /* walk the native symtab */
} /* bfdize the native symtab */
obj_symbols(abfd) = cached_area;
obj_raw_syments(abfd) = native_symbols;
bfd_get_symcount(abfd) = number_of_symbols;
obj_convert(abfd) = table_ptr;
/* Slurp the line tables for each section too */
{
asection *p;
p = abfd->sections;
while (p) {
coff_slurp_line_table(abfd, p);
p = p->next;
}
}
return true;
} /* coff_slurp_symbol_table() */
static unsigned int
coff_get_symtab_upper_bound(abfd)
bfd *abfd;
{
if (!coff_slurp_symbol_table(abfd))
return 0;
return (bfd_get_symcount(abfd) + 1) * (sizeof(coff_symbol_type *));
}
static unsigned int
DEFUN(coff_get_symtab, (abfd, alocation),
bfd *abfd AND
asymbol **alocation)
{
unsigned int counter = 0;
coff_symbol_type *symbase;
coff_symbol_type **location = (coff_symbol_type **) (alocation);
if (!coff_slurp_symbol_table(abfd))
return 0;
symbase = obj_symbols(abfd);
while (counter < bfd_get_symcount(abfd))
{
/* This nasty code looks at the symbol to decide whether or
not it is descibes a constructor/destructor entry point. It
is structured this way to (hopefully) speed non matches */
#if 0
if (0 && symbase->symbol.name[9] == '$')
{
bfd_constructor_entry(abfd,
(asymbol **)location,
symbase->symbol.name[10] == 'I' ?
"CTOR" : "DTOR");
}
#endif
*(location++) = symbase++;
counter++;
}
*location++ = 0;
return bfd_get_symcount(abfd);
}
#endif /* NO_COFF_SYMBOLS */
static unsigned int
coff_get_reloc_upper_bound(abfd, asect)
bfd *abfd;
sec_ptr asect;
{
if (bfd_get_format(abfd) != bfd_object) {
bfd_error = invalid_operation;
return 0;
}
return (asect->reloc_count + 1) * sizeof(arelent *);
}
/*
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 The entire coff relocation table is read into memory.
o Each relocation is processed in turn, first it is swapped from the
external to the internal form.
o The symbol referenced in the relocation's symbol index is
turned intoa pointer into the canonical symbol table. Note
that this table is the same as the one returned by a call to
@code{bfd_canonicalize_symtab}. The back end will call the
routine and save the result if a canonicalization hasn't been done.
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) \
if (ptr && ptr->the_bfd == abfd \
&& ((ptr->flags & BSF_OLD_COMMON)== 0)) \
{ \
cache_ptr->addend = -(ptr->section->vma + ptr->value); \
} \
else { \
cache_ptr->addend = 0; \
}
#endif
static boolean
DEFUN(coff_slurp_reloc_table,(abfd, asect, symbols),
bfd *abfd AND
sec_ptr asect AND
asymbol **symbols)
{
RELOC *native_relocs;
arelent *reloc_cache;
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;
#ifndef NO_COFF_SYMBOLS
if (!coff_slurp_symbol_table(abfd))
return false;
#endif
native_relocs =
(RELOC *) buy_and_read(abfd,
asect->rel_filepos,
SEEK_SET,
(size_t) (RELSZ *
asect->reloc_count));
reloc_cache = (arelent *)
bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
if (reloc_cache == NULL) {
bfd_error = no_memory;
return false;
}
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;
bfd_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;
bfd_swap_reloc_in(abfd, src, &dst);
cache_ptr->address = dst.r_vaddr;
if (dst.r_symndx != -1)
{
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.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;
}
/* This is stupid. This function should be a boolean predicate */
static unsigned int
DEFUN(coff_canonicalize_reloc, (abfd, section, relptr, symbols),
bfd *abfd AND
sec_ptr section AND
arelent **relptr AND
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
{
coff_slurp_reloc_table(abfd, section, symbols);
tblptr = section->relocation;
if (!tblptr)
return 0;
for (; count++ < section->reloc_count;)
*relptr++ = tblptr++;
}
*relptr = 0;
return section->reloc_count;
}
#ifndef NO_COFF_SYMBOLS
/*
provided a BFD, a section and an offset into the section, calculate and
return the name of the source file and the line nearest to the wanted
location.
*/
static boolean
DEFUN(coff_find_nearest_line,(abfd,
section,
ignore_symbols,
offset,
filename_ptr,
functionname_ptr,
line_ptr),
bfd *abfd AND
asection *section AND
asymbol **ignore_symbols AND
bfd_vma offset AND
CONST char **filename_ptr AND
CONST char **functionname_ptr AND
unsigned int *line_ptr)
{
static bfd *cache_abfd;
static asection *cache_section;
static bfd_vma cache_offset;
static unsigned int cache_i;
static alent *cache_l;
unsigned int i = 0;
coff_data_type *cof = coff_data(abfd);
/* Run through the raw syments if available */
combined_entry_type *p;
alent *l;
unsigned int line_base = 0;
*filename_ptr = 0;
*functionname_ptr = 0;
*line_ptr = 0;
/* Don't try and find line numbers in a non coff file */
if (abfd->xvec->flavour != bfd_target_coff_flavour)
return false;
if (cof == NULL)
return false;
p = cof->raw_syments;
for (i = 0; i < cof->raw_syment_count; i++) {
if (p->u.syment.n_sclass == C_FILE) {
/* File name has been moved into symbol */
*filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
break;
}
p += 1 + p->u.syment.n_numaux;
}
/* Now wander though the raw linenumbers of the section */
/*
If this is the same BFD as we were previously called with and this is
the same section, and the offset we want is further down then we can
prime the lookup loop
*/
if (abfd == cache_abfd &&
section == cache_section &&
offset >= cache_offset) {
i = cache_i;
l = cache_l;
}
else {
i = 0;
l = section->lineno;
}
for (; i < section->lineno_count; i++) {
if (l->line_number == 0) {
/* Get the symbol this line number points at */
coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym);
*functionname_ptr = coff->symbol.name;
if (coff->native) {
combined_entry_type *s = coff->native;
s = s + 1 + s->u.syment.n_numaux;
/*
S should now point to the .bf of the function
*/
if (s->u.syment.n_numaux) {
/*
The linenumber is stored in the auxent
*/
union internal_auxent *a = &((s + 1)->u.auxent);
line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
}
}
}
else {
if (l->u.offset > offset)
break;
*line_ptr = l->line_number + line_base + 1;
}
l++;
}
cache_abfd = abfd;
cache_section = section;
cache_offset = offset;
cache_i = i;
cache_l = l;
return true;
}
#ifdef GNU960
file_ptr
coff_sym_filepos(abfd)
bfd *abfd;
{
return obj_sym_filepos(abfd);
}
#endif
#endif /* NO_COFF_SYMBOLS */
static int
DEFUN(coff_sizeof_headers,(abfd, reloc),
bfd *abfd AND
boolean reloc)
{
size_t size;
if (reloc == false) {
size = FILHSZ + AOUTSZ;
}
else {
size = FILHSZ;
}
size += abfd->section_count * SCNHSZ;
return size;
}
static bfd_vma
DEFUN(get_value,(reloc, seclet),
arelent *reloc AND
bfd_seclet_type *seclet)
{
bfd_vma value;
asymbol *symbol = *(reloc->sym_ptr_ptr);
/* A symbol holds a pointer to a section, and an offset from the
base of the section. To relocate, we find where the section will
live in the output and add that in */
if (symbol->section == &bfd_und_section)
{
/* Ouch, this is an undefined symbol.. */
bfd_error_vector.undefined_symbol(reloc, seclet);
value = symbol->value;
}
else
{
value = symbol->value +
symbol->section->output_offset +
symbol->section->output_section->vma;
}
/* Add the value contained in the relocation */
value += (short)((reloc->addend) & 0xffff);
return value;
}
static void
DEFUN(perform_slip,(s, slip, input_section, value),
asymbol **s AND
unsigned int slip AND
asection *input_section AND
bfd_vma value)
{
/* Find all symbols past this point, and make them know
what's happened */
while (*s)
{
asymbol *p = *s;
if (p->section == input_section)
{
/* This was pointing into this section, so mangle it */
if (p->value > value)
{
p->value -=2;
}
}
s++;
}
}
static int
DEFUN(movb1,(input_section, symbols, r, shrink),
asection *input_section AND
asymbol **symbols AND
arelent *r AND
unsigned int shrink)
{
bfd_vma value = get_value(r,0);
if (value >= 0xff00)
{
/* Change the reloc type from 16bit, possible 8 to 8bit
possible 16 */
r->howto = r->howto + 1;
/* The place to relc moves back by one */
r->address -=1;
/* This will be two bytes smaller in the long run */
shrink +=2 ;
perform_slip(symbols, 2, input_section, r->address - shrink +1);
}
return shrink;
}
static int
DEFUN(jmp1,(input_section, symbols, r, shrink),
asection *input_section AND
asymbol **symbols AND
arelent *r AND
unsigned int shrink)
{
bfd_vma value = get_value(r, 0);
bfd_vma dot = input_section->output_section->vma +
input_section->output_offset + r->address;
bfd_vma gap;
/* See if the address we're looking at within 127 bytes of where
we are, if so then we can use a small branch rather than the
jump we were going to */
gap = value - (dot - shrink);
if (-120 < (long)gap && (long)gap < 120 )
{
/* Change the reloc type from 16bit, possible 8 to 8bit
possible 16 */
r->howto = r->howto + 1;
/* The place to relc moves back by one */
r->address -=1;
/* This will be two bytes smaller in the long run */
shrink +=2 ;
perform_slip(symbols, 2, input_section, r->address-shrink +1);
}
return shrink;
}
static boolean
DEFUN(bfd_coff_relax_section,(abfd, i, symbols),
bfd *abfd AND
asection *i AND
asymbol **symbols)
{
/* Get enough memory to hold the stuff */
bfd *input_bfd = i->owner;
asection *input_section = i;
int shrink = 0 ;
boolean new = false;
bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
input_section);
arelent **reloc_vector = (arelent **)bfd_xmalloc(reloc_size);
/* Get the relocs and think about them */
if (bfd_canonicalize_reloc(input_bfd,
input_section,
reloc_vector,
symbols))
{
arelent **parent;
for (parent = reloc_vector; *parent; parent++)
{
arelent *r = *parent;
switch (r->howto->type) {
case R_MOVB2:
case R_JMP2:
shrink+=2;
break;
case R_MOVB1:
shrink = movb1(input_section, symbols, r, shrink);
new = true;
break;
case R_JMP1:
shrink = jmp1(input_section, symbols, r, shrink);
new = true;
break;
}
}
}
input_section->_cooked_size -= shrink;
free((char *)reloc_vector);
return new;
}
static bfd_byte *
DEFUN(bfd_coff_get_relocated_section_contents,(in_abfd, seclet),
bfd *in_abfd AND
bfd_seclet_type *seclet)
{
/* Get enough memory to hold the stuff */
bfd *input_bfd = seclet->u.indirect.section->owner;
asection *input_section = seclet->u.indirect.section;
bfd_byte *data = (bfd_byte *)malloc(input_section->_raw_size);
bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
input_section);
arelent **reloc_vector = (arelent **)bfd_xmalloc(reloc_size);
/* read in the section */
bfd_get_section_contents(input_bfd,
input_section,
data,
0,
input_section->_raw_size);
if (bfd_canonicalize_reloc(input_bfd,
input_section,
reloc_vector,
seclet->u.indirect.symbols) )
{
arelent **parent = reloc_vector;
arelent *reloc ;
unsigned int dst_address = 0;
unsigned int src_address = 0;
unsigned int run;
unsigned int idx;
/* Find how long a run we can do */
while (dst_address < seclet->size)
{
reloc = *parent;
if (reloc)
{
/* Note that the relaxing didn't tie up the addresses in the
relocation, so we use the original address to work out the
run of non-relocated data */
run = reloc->address - src_address;
parent++;
}
else
{
run = seclet->size - dst_address;
}
/* Copy the bytes */
for (idx = 0; idx < run; idx++)
{
data[dst_address++] = data[src_address++];
}
/* Now do the relocation */
if (reloc)
{
switch (reloc->howto->type)
{
case R_JMP2:
/* Speciial relaxed type */
{
bfd_vma dot = seclet->offset + dst_address + seclet->u.indirect.section->output_section->vma;
int gap = get_value(reloc,seclet)-dot-1;
if ((gap & ~0xff ) != 0 &&((gap & 0xff00)!= 0xff00)) abort();
bfd_put_8(in_abfd,gap, data+dst_address);
switch (data[dst_address-1])
{
case 0x5e:
/* jsr -> bsr */
bfd_put_8(in_abfd, 0x55, data+dst_address-1);
break;
case 0x5a:
/* jmp ->bra */
bfd_put_8(in_abfd, 0x40, data+dst_address-1);
break;
default:
abort();
}
dst_address++;
src_address+=3;
break;
}
case R_MOVB2:
/* Special relaxed type, there will be a gap between where we
get stuff from and where we put stuff to now
for a mov.b @aa:16 -> mov.b @aa:8
opcode 0x6a 0x0y offset
-> 0x2y off
*/
if (data[dst_address-1] != 0x6a)
abort();
switch (data[dst_address] & 0xf0)
{
case 0x00:
/* Src is memory */
data[dst_address-1] = (data[src_address] & 0xf) | 0x20;
break;
case 0x80:
/* Src is reg */
data[dst_address-1] = (data[src_address] & 0xf) | 0x30;
break;
default:
abort();
}
/* the offset must fit ! after all, what was all the relaxing
about ? */
bfd_put_8(in_abfd, get_value(reloc, seclet), data + dst_address);
/* Note the magic - src goes up by two bytes, but dst by only
one */
dst_address+=1;
src_address+=3;
break;
/* PCrel 8 bits */
case R_PCRBYTE:
{
bfd_vma dot = seclet->offset + dst_address + seclet->u.indirect.section->output_section->vma;
int gap = get_value(reloc,seclet)-dot;
if (gap > 127 || gap < -128)
{
bfd_error_vector.reloc_value_truncated(reloc, seclet);
}
bfd_put_8(in_abfd,gap, data+dst_address);
dst_address++;
src_address++;
break;
}
case R_RELBYTE:
{
unsigned int gap =get_value(reloc,seclet);
if (gap > 256)
{
bfd_error_vector.reloc_value_truncated(reloc, seclet);
}
bfd_put_8(in_abfd, gap, data+dst_address);
dst_address+=1;
src_address+=1;
}
break;
case R_JMP1:
/* A relword which would have like to have been a pcrel */
case R_MOVB1:
/* A relword which would like to have been modified but
didn't make it */
case R_RELWORD:
bfd_put_16(in_abfd, get_value(reloc,seclet), data+dst_address);
dst_address+=2;
src_address+=2;
break;
default:
abort();
}
}
}
}
free((char *)reloc_vector);
return data;
}
#define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
#define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
#define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
#define coff_slurp_armap bfd_slurp_coff_armap
#define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
#define coff_truncate_arname bfd_dont_truncate_arname
#define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
#define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
#define coff_get_section_contents bfd_generic_get_section_contents
#define coff_close_and_cleanup bfd_generic_close_and_cleanup
#define coff_bfd_debug_info_start bfd_void
#define coff_bfd_debug_info_end bfd_void
#define coff_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
#define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
#define coff_bfd_relax_section bfd_generic_relax_section
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