2298 lines
63 KiB
C
2298 lines
63 KiB
C
/* Support for the generic parts of most COFF variants, for BFD.
|
||
Copyright 1990, 1991, 1992, 1993 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{coff/internal.h} which
|
||
defines the internal structure. @code{coff-m88k.c} also
|
||
defines the relocations used by the 88k format
|
||
@xref{Relocations}.
|
||
|
||
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/coff/i386.h} to @code{../include/coff/foo.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/coff/foo.h} so that they match
|
||
what you need. You will probably also have to add
|
||
@code{#ifdef}s to the code in @code{coff/internal.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
|
||
File Layout
|
||
|
||
The Coff backend is split into generic routines that are
|
||
applicable to any Coff target and routines that are specific
|
||
to a particular target. The target-specific routines are
|
||
further split into ones which are basically the same for all
|
||
Coff targets except that they use the external symbol format
|
||
or use different values for certain constants.
|
||
|
||
The generic routines are in @file{coffgen.c}. These routines
|
||
work for any Coff target. They use some hooks into the target
|
||
specific code; the hooks are in a @code{bfd_coff_backend_data}
|
||
structure, one of which exists for each target.
|
||
|
||
The essentially similar target-specific routines are in
|
||
@file{coffcode.h}. This header file includes executable code.
|
||
The various Coff targets first include the appropriate Coff
|
||
header file, make any special defines that are needed, and
|
||
then include @file{coffcode.h}.
|
||
|
||
Some of the Coff targets then also have additional routines in
|
||
the target source file itself.
|
||
|
||
For example, @file{coff-i960.c} includes
|
||
@file{coff/internal.h} and @file{coff/i960.h}. It then
|
||
defines a few constants, such as @code{I960}, and includes
|
||
@file{coffcode.h}. Since the i960 has complex relocation
|
||
types, @file{coff-i960.c} also includes some code to
|
||
manipulate the i960 relocs. This code is not in
|
||
@file{coffcode.h} because it would not be used by any other
|
||
target.
|
||
|
||
SUBSUBSECTION
|
||
Bit Twiddling
|
||
|
||
Each flavour of coff supported in BFD has its own header file
|
||
descibing the external layout of the structures. There is also
|
||
an internal description of the coff layout (in
|
||
@code{coff/internal.h}). A major function of the
|
||
coff backend is swapping the bytes and twiddling the bits to
|
||
translate the external form of the structures into the normal
|
||
internal form. This is all performed in the
|
||
@code{bfd_swap}_@i{thing}_@i{direction} routines. Some
|
||
elements are different sizes between different versions of
|
||
coff, it is the duty of the coff version specific include file
|
||
to override the definitions of various packing routines in
|
||
@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{coff_get_normalized_symtab}. This reads the symbol table from
|
||
the coff file and swaps all the structures inside into the
|
||
internal form. It also fixes up all the pointers in the table
|
||
(represented in the file by offsets from the first symbol in
|
||
the table) into physical pointers to elements in the new
|
||
internal table. This involves some work since the meanings of
|
||
fields 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"
|
||
#include "coffswap.h"
|
||
|
||
/* 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))
|
||
{
|
||
styp_flags = STYP_TEXT;
|
||
}
|
||
else if (!strcmp(sec_name, _DATA))
|
||
{
|
||
styp_flags = STYP_DATA;
|
||
#ifdef TWO_DATA_SECS
|
||
}
|
||
else if (!strcmp(sec_name, ".data2"))
|
||
{
|
||
styp_flags = STYP_DATA;
|
||
#endif /* TWO_DATA_SECS */
|
||
}
|
||
else if (!strcmp(sec_name, _BSS))
|
||
{
|
||
styp_flags = STYP_BSS;
|
||
#ifdef _COMMENT
|
||
}
|
||
else if (!strcmp(sec_name, _COMMENT))
|
||
{
|
||
styp_flags = STYP_INFO;
|
||
#endif /* _COMMENT */
|
||
#ifdef _LIB
|
||
}
|
||
else if (!strcmp(sec_name, _LIB))
|
||
{
|
||
styp_flags = STYP_LIB;
|
||
#endif /* _LIB */
|
||
#ifdef _LIT
|
||
}
|
||
else if (!strcmp (sec_name, _LIT))
|
||
{
|
||
styp_flags = STYP_LIT;
|
||
#endif /* _LIT */
|
||
|
||
}
|
||
/* Try and figure out what it should be */
|
||
else if (sec_flags & SEC_CODE)
|
||
{
|
||
styp_flags = STYP_TEXT;
|
||
}
|
||
else if (sec_flags & SEC_DATA)
|
||
{
|
||
styp_flags = STYP_DATA;
|
||
}
|
||
else if (sec_flags & SEC_READONLY)
|
||
{
|
||
#ifdef STYP_LIT /* 29k readonly text/data section */
|
||
styp_flags = STYP_LIT;
|
||
#else
|
||
styp_flags = STYP_TEXT;
|
||
#endif /* STYP_LIT */
|
||
}
|
||
else if (sec_flags & SEC_LOAD)
|
||
{
|
||
styp_flags = STYP_TEXT;
|
||
}
|
||
else {
|
||
styp_flags = STYP_BSS;
|
||
}
|
||
|
||
#ifdef STYP_NOLOAD
|
||
if (sec_flags & SEC_NEVER_LOAD)
|
||
styp_flags |= STYP_NOLOAD;
|
||
#endif
|
||
|
||
return(styp_flags);
|
||
}
|
||
/*
|
||
* Return a word with SEC_* flags set to represent the incoming
|
||
* STYP_* flags (from scnhdr.s_flags). The inverse of this
|
||
* function is sec_to_styp_flags().
|
||
* NOTE: If you add to/change this routine, you should mirror the changes
|
||
* in sec_to_styp_flags().
|
||
*/
|
||
static flagword
|
||
DEFUN(styp_to_sec_flags, (abfd, hdr),
|
||
bfd *abfd AND
|
||
PTR hdr)
|
||
{
|
||
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
|
||
long styp_flags = internal_s->s_flags;
|
||
flagword sec_flags=0;
|
||
|
||
#ifdef STYP_NOLOAD
|
||
if (styp_flags & STYP_NOLOAD)
|
||
{
|
||
sec_flags |= SEC_NEVER_LOAD;
|
||
}
|
||
#endif /* STYP_NOLOAD */
|
||
|
||
/* For 386 COFF, at least, an unloadable text or data section is
|
||
actually a shared library section. */
|
||
if (styp_flags & STYP_TEXT)
|
||
{
|
||
if (sec_flags & SEC_NEVER_LOAD)
|
||
sec_flags |= SEC_CODE | SEC_SHARED_LIBRARY;
|
||
else
|
||
sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_DATA)
|
||
{
|
||
if (sec_flags & SEC_NEVER_LOAD)
|
||
sec_flags |= SEC_DATA | SEC_SHARED_LIBRARY;
|
||
else
|
||
sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_BSS)
|
||
{
|
||
#ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
|
||
if (sec_flags & SEC_NEVER_LOAD)
|
||
sec_flags |= SEC_ALLOC | SEC_SHARED_LIBRARY;
|
||
else
|
||
#endif
|
||
sec_flags |= SEC_ALLOC;
|
||
}
|
||
else if (styp_flags & STYP_INFO)
|
||
{
|
||
/* Nothing to do. */
|
||
}
|
||
else
|
||
{
|
||
sec_flags |= SEC_ALLOC | SEC_LOAD;
|
||
}
|
||
|
||
#ifdef STYP_LIT /* A29k readonly text/data section type */
|
||
if ((styp_flags & STYP_LIT) == STYP_LIT)
|
||
{
|
||
sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
|
||
}
|
||
#endif /* STYP_LIT */
|
||
#ifdef STYP_OTHER_LOAD /* Other loaded sections */
|
||
if (styp_flags & STYP_OTHER_LOAD)
|
||
{
|
||
sec_flags = (SEC_LOAD | SEC_ALLOC);
|
||
}
|
||
#endif /* STYP_SDATA */
|
||
|
||
return(sec_flags);
|
||
}
|
||
|
||
#define get_index(symbol) ((long) (symbol)->udata)
|
||
|
||
/*
|
||
INTERNAL_DEFINITION
|
||
bfd_coff_backend_data
|
||
|
||
CODE_FRAGMENT
|
||
|
||
Special entry points for gdb to swap in coff symbol table parts
|
||
.typedef struct
|
||
.{
|
||
. void (*_bfd_coff_swap_aux_in) PARAMS ((
|
||
. bfd *abfd ,
|
||
. PTR ext,
|
||
. int type,
|
||
. int class ,
|
||
. PTR in));
|
||
.
|
||
. void (*_bfd_coff_swap_sym_in) PARAMS ((
|
||
. bfd *abfd ,
|
||
. PTR ext,
|
||
. PTR in));
|
||
.
|
||
. void (*_bfd_coff_swap_lineno_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
.
|
||
|
||
Special entry points for gas to swap coff parts
|
||
|
||
. unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. int type,
|
||
. int class,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR ext));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR src,
|
||
. PTR dst));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
. unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR in,
|
||
. PTR out));
|
||
.
|
||
|
||
Special entry points for generic COFF routines to call target
|
||
dependent COFF routines
|
||
|
||
. unsigned int _bfd_filhsz;
|
||
. unsigned int _bfd_aoutsz;
|
||
. unsigned int _bfd_scnhsz;
|
||
. unsigned int _bfd_symesz;
|
||
. unsigned int _bfd_auxesz;
|
||
. unsigned int _bfd_linesz;
|
||
. boolean _bfd_coff_long_filenames;
|
||
. void (*_bfd_coff_swap_filehdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR ext,
|
||
. PTR in));
|
||
. boolean (*_bfd_coff_bad_format_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr));
|
||
. boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr));
|
||
. PTR (*_bfd_coff_mkobject_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_filehdr,
|
||
. PTR internal_aouthdr));
|
||
. flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. PTR internal_scnhdr));
|
||
. asection *(*_bfd_make_section_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. char *name));
|
||
. void (*_bfd_set_alignment_hook) PARAMS ((
|
||
. bfd *abfd,
|
||
. asection *sec,
|
||
. PTR internal_scnhdr));
|
||
. boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
|
||
. bfd *abfd));
|
||
. boolean (*_bfd_coff_symname_in_debug) PARAMS ((
|
||
. bfd *abfd,
|
||
. struct internal_syment *sym));
|
||
. void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
|
||
. bfd *abfd,
|
||
. struct bfd_seclet *seclet,
|
||
. arelent *reloc,
|
||
. bfd_byte *data,
|
||
. unsigned int *src_ptr,
|
||
. unsigned int *dst_ptr));
|
||
.} bfd_coff_backend_data;
|
||
.
|
||
.#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
|
||
.
|
||
.#define bfd_coff_swap_aux_in(a,e,t,c,i) \
|
||
. ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
|
||
.
|
||
.#define bfd_coff_swap_sym_in(a,e,i) \
|
||
. ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
|
||
.
|
||
.#define bfd_coff_swap_lineno_in(a,e,i) \
|
||
. ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
|
||
.
|
||
.#define bfd_coff_swap_reloc_out(abfd, i, o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_lineno_out(abfd, i, o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
|
||
.
|
||
.#define bfd_coff_swap_sym_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_filehdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
|
||
.#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
|
||
.#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
|
||
.#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
|
||
.#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
|
||
.#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
|
||
.#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
|
||
.#define bfd_coff_swap_filehdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
|
||
.
|
||
.#define bfd_coff_bad_format_hook(abfd, filehdr) \
|
||
. ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
|
||
.
|
||
.#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
|
||
.#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
|
||
.
|
||
.#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
|
||
.
|
||
.#define bfd_coff_make_section_hook(abfd, name)\
|
||
. ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
|
||
.
|
||
.#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
|
||
. ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
|
||
.
|
||
.#define bfd_coff_slurp_symbol_table(abfd)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
|
||
.
|
||
.#define bfd_coff_symname_in_debug(abfd, sym)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
|
||
.
|
||
.#define bfd_coff_reloc16_extra_cases(abfd, seclet, reloc, data, src_ptr, dst_ptr)\
|
||
. ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
|
||
. (abfd, seclet, reloc, data, src_ptr, dst_ptr))
|
||
.
|
||
*/
|
||
|
||
/* See whether the magic number matches. */
|
||
|
||
static boolean
|
||
DEFUN(coff_bad_format_hook, (abfd, filehdr),
|
||
bfd *abfd AND
|
||
PTR filehdr)
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
if (BADMAG (*internal_f))
|
||
return false;
|
||
|
||
/* if the optional header is NULL or not the correct size then
|
||
quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
|
||
and Intel 960 readwrite headers (I960WRMAGIC) is that the
|
||
optional header is of a different size.
|
||
|
||
But the mips keeps extra stuff in it's opthdr, so dont check
|
||
when doing that
|
||
*/
|
||
|
||
#if defined(M88) || defined(I960)
|
||
if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
|
||
return false;
|
||
#endif
|
||
|
||
return true;
|
||
}
|
||
|
||
static asection *
|
||
DEFUN (coff_make_section_hook, (abfd, name),
|
||
bfd *abfd AND
|
||
char *name)
|
||
{
|
||
#ifdef TWO_DATA_SECS
|
||
/* On SCO a file created by the Microsoft assembler can have two
|
||
.data sections. We use .data2 for the second one. */
|
||
if (strcmp (name, _DATA) == 0)
|
||
return bfd_make_section (abfd, ".data2");
|
||
#endif
|
||
return (asection *) NULL;
|
||
}
|
||
|
||
/*
|
||
initialize a section structure with information peculiar to this
|
||
particular implementation of coff
|
||
*/
|
||
|
||
static boolean
|
||
DEFUN(coff_new_section_hook,(abfd, section),
|
||
bfd *abfd AND
|
||
asection *section)
|
||
{
|
||
section->alignment_power = abfd->xvec->align_power_min;
|
||
/* Allocate aux records for section symbols, to store size and
|
||
related info.
|
||
|
||
@@ Shouldn't use constant multiplier here! */
|
||
coffsymbol (section->symbol)->native =
|
||
(combined_entry_type *) bfd_zalloc (abfd,
|
||
sizeof (combined_entry_type) * 10);
|
||
return true;
|
||
}
|
||
|
||
|
||
#ifdef I960
|
||
|
||
/* Set the alignment of a BFD section. */
|
||
|
||
static void
|
||
DEFUN (coff_set_alignment_hook, (abfd, section, scnhdr),
|
||
bfd *abfd AND
|
||
asection *section AND
|
||
PTR scnhdr)
|
||
{
|
||
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < 32; i++)
|
||
if ((1 << i) >= hdr->s_align)
|
||
break;
|
||
section->alignment_power = i;
|
||
}
|
||
|
||
#else /* ! I960 */
|
||
|
||
#define coff_set_alignment_hook \
|
||
((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
|
||
|
||
#endif /* ! I960 */
|
||
|
||
static boolean
|
||
DEFUN(coff_mkobject,(abfd),
|
||
bfd *abfd)
|
||
{
|
||
coff_data_type *coff;
|
||
|
||
abfd->tdata.coff_obj_data = (struct coff_tdata *)bfd_zalloc (abfd,sizeof(coff_data_type));
|
||
if (abfd->tdata.coff_obj_data == 0){
|
||
bfd_error = no_memory;
|
||
return false;
|
||
}
|
||
coff = coff_data (abfd);
|
||
coff->symbols = (coff_symbol_type *) NULL;
|
||
coff->conversion_table = (unsigned int *) NULL;
|
||
coff->raw_syments = (struct coff_ptr_struct *) NULL;
|
||
coff->raw_linenos = (struct lineno *) NULL;
|
||
coff->relocbase = 0;
|
||
/* make_abs_section(abfd);*/
|
||
return true;
|
||
}
|
||
|
||
/* Create the COFF backend specific information. */
|
||
|
||
static PTR
|
||
DEFUN(coff_mkobject_hook,(abfd, filehdr, aouthdr),
|
||
bfd *abfd AND
|
||
PTR filehdr AND
|
||
PTR aouthdr)
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
coff_data_type *coff;
|
||
|
||
if (coff_mkobject (abfd) == false)
|
||
return NULL;
|
||
|
||
coff = coff_data (abfd);
|
||
|
||
coff->sym_filepos = internal_f->f_symptr;
|
||
coff->flags = internal_f->f_flags;
|
||
|
||
/* These members communicate important constants about the symbol
|
||
table to GDB's symbol-reading code. These `constants'
|
||
unfortunately vary among coff implementations... */
|
||
coff->local_n_btmask = N_BTMASK;
|
||
coff->local_n_btshft = N_BTSHFT;
|
||
coff->local_n_tmask = N_TMASK;
|
||
coff->local_n_tshift = N_TSHIFT;
|
||
coff->local_symesz = SYMESZ;
|
||
coff->local_auxesz = AUXESZ;
|
||
coff->local_linesz = LINESZ;
|
||
|
||
return (PTR) coff;
|
||
}
|
||
|
||
/* Determine the machine architecture and type. FIXME: This is target
|
||
dependent because the magic numbers are defined in the target
|
||
dependent header files. But there is no particular need for this.
|
||
If the magic numbers were moved to a separate file, this function
|
||
would be target independent and would also be much more successful
|
||
at linking together COFF files for different architectures. */
|
||
|
||
static boolean
|
||
coff_set_arch_mach_hook(abfd, filehdr)
|
||
bfd *abfd;
|
||
PTR filehdr;
|
||
{
|
||
long machine;
|
||
enum bfd_architecture arch;
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
machine = 0;
|
||
switch (internal_f->f_magic) {
|
||
#ifdef I386MAGIC
|
||
case I386MAGIC:
|
||
case I386PTXMAGIC:
|
||
case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
|
||
case I386LYNXMAGIC:
|
||
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 MC68MAGIC
|
||
case MC68MAGIC:
|
||
case M68MAGIC:
|
||
case MC68KBCSMAGIC:
|
||
arch = bfd_arch_m68k;
|
||
machine = 68020;
|
||
break;
|
||
#endif
|
||
#ifdef MC88MAGIC
|
||
case MC88MAGIC:
|
||
case MC88DMAGIC:
|
||
case MC88OMAGIC:
|
||
arch = bfd_arch_m88k;
|
||
machine = 88100;
|
||
break;
|
||
#endif
|
||
#ifdef Z8KMAGIC
|
||
case Z8KMAGIC:
|
||
arch = bfd_arch_z8k;
|
||
switch (internal_f->f_flags & F_MACHMASK)
|
||
{
|
||
case F_Z8001:
|
||
machine = bfd_mach_z8001;
|
||
break;
|
||
case F_Z8002:
|
||
machine = bfd_mach_z8002;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
break;
|
||
#endif
|
||
#ifdef 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 WE32KMAGIC
|
||
case WE32KMAGIC:
|
||
arch = bfd_arch_we32k;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8300MAGIC
|
||
case H8300MAGIC:
|
||
arch = bfd_arch_h8300;
|
||
machine = bfd_mach_h8300;
|
||
/* !! FIXME this probably isn't the right place for this */
|
||
abfd->flags |= BFD_IS_RELAXABLE;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8300HMAGIC
|
||
case H8300HMAGIC:
|
||
arch = bfd_arch_h8300;
|
||
machine = bfd_mach_h8300h;
|
||
/* !! FIXME this probably isn't the right place for this */
|
||
abfd->flags |= BFD_IS_RELAXABLE;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SHMAGIC
|
||
case SHMAGIC:
|
||
arch = bfd_arch_sh;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8500MAGIC
|
||
case H8500MAGIC:
|
||
arch = bfd_arch_h8500;
|
||
machine = 0;
|
||
break;
|
||
#endif
|
||
|
||
default: /* Unreadable input file type */
|
||
arch = bfd_arch_obscure;
|
||
break;
|
||
}
|
||
|
||
bfd_default_set_arch_mach(abfd, arch, machine);
|
||
return true;
|
||
}
|
||
|
||
#ifdef SYMNAME_IN_DEBUG
|
||
|
||
static boolean
|
||
DEFUN (symname_in_debug_hook, (abfd, sym),
|
||
bfd *abfd AND
|
||
struct internal_syment *sym)
|
||
{
|
||
return SYMNAME_IN_DEBUG (sym) ? true : false;
|
||
}
|
||
|
||
#else
|
||
|
||
#define symname_in_debug_hook \
|
||
(boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
|
||
|
||
#endif
|
||
|
||
/*
|
||
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;
|
||
/* The 29k const/consth reloc pair is a real kludge - the consth
|
||
part doesn't have a symbol - it has an offset. So rebuilt
|
||
that here */
|
||
#ifdef R_IHCONST
|
||
if (q->howto->type == R_IHCONST)
|
||
n.r_symndx = q->addend;
|
||
else
|
||
#endif
|
||
|
||
|
||
if (q->sym_ptr_ptr)
|
||
{
|
||
if (q->sym_ptr_ptr == bfd_abs_section.symbol_ptr_ptr)
|
||
{
|
||
/* This is a relocation relative to the absolute symbol */
|
||
n.r_symndx = -1;
|
||
}
|
||
else
|
||
{
|
||
n.r_symndx = get_index((*(q->sym_ptr_ptr)));
|
||
/* Take notice if the symbol reloc points to a symbol we don't have
|
||
in our symbol table. What should we do for this?? */
|
||
if (n.r_symndx > obj_conv_table_size (abfd))
|
||
abort ();
|
||
}
|
||
|
||
|
||
}
|
||
|
||
#ifdef 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) &dst, 1, RELSZ, abfd);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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 Z8KMAGIC
|
||
case bfd_arch_z8k:
|
||
*magicp = Z8KMAGIC;
|
||
switch (bfd_get_mach(abfd))
|
||
{
|
||
case bfd_mach_z8001:
|
||
*flagsp = F_Z8001;
|
||
break;
|
||
case bfd_mach_z8002:
|
||
*flagsp = F_Z8002;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
return true;
|
||
#endif
|
||
#ifdef I960ROMAGIC
|
||
|
||
case bfd_arch_i960:
|
||
|
||
{
|
||
unsigned flags;
|
||
*magicp = I960ROMAGIC;
|
||
/*
|
||
((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
|
||
I960RWMAGIC); FIXME???
|
||
*/
|
||
switch (bfd_get_mach(abfd)) {
|
||
case bfd_mach_i960_core:
|
||
flags = F_I960CORE;
|
||
break;
|
||
case bfd_mach_i960_kb_sb:
|
||
flags = F_I960KB;
|
||
break;
|
||
case bfd_mach_i960_mc:
|
||
flags = F_I960MC;
|
||
break;
|
||
case bfd_mach_i960_xa:
|
||
flags = F_I960XA;
|
||
break;
|
||
case bfd_mach_i960_ca:
|
||
flags = F_I960CA;
|
||
break;
|
||
case bfd_mach_i960_ka_sa:
|
||
flags = F_I960KA;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
*flagsp = flags;
|
||
return true;
|
||
}
|
||
break;
|
||
#endif
|
||
#ifdef I386MAGIC
|
||
case bfd_arch_i386:
|
||
*magicp = I386MAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef MC68MAGIC
|
||
case bfd_arch_m68k:
|
||
*magicp = MC68MAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef MC88MAGIC
|
||
case bfd_arch_m88k:
|
||
*magicp = MC88OMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef H8300MAGIC
|
||
case bfd_arch_h8300:
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_h8300:
|
||
*magicp = H8300MAGIC;
|
||
return true;
|
||
case bfd_mach_h8300h:
|
||
*magicp = H8300HMAGIC;
|
||
return true;
|
||
}
|
||
break;
|
||
#endif
|
||
|
||
#ifdef SHMAGIC
|
||
case bfd_arch_sh:
|
||
*magicp = SHMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef H8500MAGIC
|
||
case bfd_arch_h8500:
|
||
*magicp = H8500MAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
#ifdef A29K_MAGIC_BIG
|
||
case bfd_arch_a29k:
|
||
if (abfd->xvec->byteorder_big_p)
|
||
*magicp = A29K_MAGIC_BIG;
|
||
else
|
||
*magicp = A29K_MAGIC_LITTLE;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef WE32KMAGIC
|
||
case bfd_arch_we32k:
|
||
*magicp = WE32KMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
#ifdef U802TOCMAGIC
|
||
case bfd_arch_rs6000:
|
||
*magicp = U802TOCMAGIC;
|
||
return true;
|
||
break;
|
||
#endif
|
||
|
||
default: /* Unknown architecture */
|
||
/* return false; -- fall through to "return false" below, to avoid
|
||
"statement never reached" errors on the one below. */
|
||
break;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
|
||
static boolean
|
||
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;
|
||
#ifndef I960
|
||
file_ptr old_sofar;
|
||
#endif
|
||
if (bfd_get_start_address(abfd))
|
||
{
|
||
/* A start address may have been added to the original file. In this
|
||
case it will need an optional header to record it. */
|
||
abfd->flags |= EXEC_P;
|
||
}
|
||
|
||
if (abfd->flags & EXEC_P)
|
||
sofar += AOUTSZ;
|
||
|
||
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;
|
||
|
||
sofar += current->_raw_size;
|
||
#ifndef I960
|
||
/* make sure that this section is of the right size too */
|
||
old_sofar = sofar;
|
||
sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
|
||
current->_raw_size += sofar - old_sofar ;
|
||
#endif
|
||
|
||
#ifdef _LIB
|
||
/* Force .lib sections to start at zero. The vma is then
|
||
incremented in coff_set_section_contents. This is right for
|
||
SVR3.2. */
|
||
if (strcmp (current->name, _LIB) == 0)
|
||
bfd_set_section_vma (abfd, current, 0);
|
||
#endif
|
||
|
||
previous = current;
|
||
}
|
||
obj_relocbase(abfd) = sofar;
|
||
}
|
||
|
||
/* If .file, .text, .data, .bss symbols are missing, add them. */
|
||
/* @@ Should we only be adding missing symbols, or overriding the aux
|
||
values for existing section symbols? */
|
||
static void
|
||
coff_add_missing_symbols (abfd)
|
||
bfd *abfd;
|
||
{
|
||
unsigned int nsyms = bfd_get_symcount (abfd);
|
||
asymbol **sympp = abfd->outsymbols;
|
||
asymbol **sympp2;
|
||
unsigned int i;
|
||
int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
|
||
|
||
for (i = 0; i < nsyms; i++)
|
||
{
|
||
coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
|
||
CONST char *name;
|
||
if (csym)
|
||
{
|
||
/* only do this if there is a coff representation of the input
|
||
symbol */
|
||
if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
|
||
{
|
||
need_file = 0;
|
||
continue;
|
||
}
|
||
name = csym->symbol.name;
|
||
if (!name)
|
||
continue;
|
||
if (!strcmp (name, _TEXT))
|
||
need_text = 0;
|
||
else if (!strcmp (name, _DATA))
|
||
need_data = 0;
|
||
else if (!strcmp (name, _BSS))
|
||
need_bss = 0;
|
||
}
|
||
}
|
||
/* Now i == bfd_get_symcount (abfd). */
|
||
/* @@ For now, don't deal with .file symbol. */
|
||
need_file = 0;
|
||
|
||
if (!need_text && !need_data && !need_bss && !need_file)
|
||
return;
|
||
nsyms += need_text + need_data + need_bss + need_file;
|
||
sympp2 = (asymbol**) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
|
||
memcpy (sympp2, sympp, i * sizeof (asymbol *));
|
||
if (need_file)
|
||
{
|
||
/* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
|
||
abort ();
|
||
}
|
||
if (need_text)
|
||
sympp2[i++] = coff_section_symbol (abfd, _TEXT);
|
||
if (need_data)
|
||
sympp2[i++] = coff_section_symbol (abfd, _DATA);
|
||
if (need_bss)
|
||
sympp2[i++] = coff_section_symbol (abfd, _BSS);
|
||
BFD_ASSERT (i == nsyms);
|
||
bfd_set_symtab (abfd, sympp2, nsyms);
|
||
}
|
||
|
||
/* 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 *.
|
||
@@ The code doesn't make this check. Is it supposed to be done,
|
||
or isn't it?? */
|
||
count = 1;
|
||
for (current = abfd->sections; current != (asection *)NULL;
|
||
current = current->next)
|
||
{
|
||
current->target_index = count;
|
||
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 */
|
||
|
||
lnno_size = coff_count_linenumbers(abfd) * LINESZ;
|
||
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;
|
||
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;
|
||
lineno_base += current->lineno_count * LINESZ;
|
||
}
|
||
else {
|
||
current->line_filepos = 0;
|
||
}
|
||
if (current->reloc_count) {
|
||
current->rel_filepos = reloc_base;
|
||
reloc_base += current->reloc_count * RELSZ;
|
||
}
|
||
else {
|
||
current->rel_filepos = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* Write section headers to the file. */
|
||
internal_f.f_nscns = 0;
|
||
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);
|
||
#ifdef _LIB
|
||
/* Always set s_vaddr of .lib to 0. This is right for SVR3.2
|
||
Ian Taylor <ian@cygnus.com>. */
|
||
if (strcmp (current->name, _LIB) == 0)
|
||
section.s_vaddr = 0;
|
||
else
|
||
#endif
|
||
section.s_vaddr = current->lma + pad;
|
||
section.s_paddr = current->lma + 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 | SEC_HAS_CONTENTS)) == 0) {
|
||
section.s_scnptr = 0;
|
||
}
|
||
else {
|
||
section.s_scnptr = current->filepos;
|
||
}
|
||
section.s_relptr = current->rel_filepos;
|
||
section.s_lnnoptr = current->line_filepos;
|
||
section.s_nreloc = current->reloc_count;
|
||
section.s_nlnno = current->lineno_count;
|
||
if (current->reloc_count != 0)
|
||
hasrelocs = true;
|
||
if (current->lineno_count != 0)
|
||
haslinno = true;
|
||
|
||
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;
|
||
#ifdef TWO_DATA_SECS
|
||
} else if (!strcmp(current->name, ".data2")) {
|
||
data_sec = current;
|
||
#endif /* TWO_DATA_SECS */
|
||
} 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, §ion, &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
|
||
*/
|
||
internal_f.f_timdat = 0;
|
||
|
||
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 || WE32K
|
||
#define __A_MAGIC_SET__
|
||
/* Never was anything here for the 68k */
|
||
#endif /* M68 || WE32K */
|
||
|
||
#if I386
|
||
# define __A_MAGIC_SET__
|
||
internal_a.magic = ZMAGIC;
|
||
#endif /* I386 */
|
||
|
||
#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;
|
||
|
||
if (bfd_get_symcount(abfd) != 0) {
|
||
coff_add_missing_symbols (abfd);
|
||
coff_renumber_symbols(abfd);
|
||
coff_mangle_symbols(abfd);
|
||
coff_write_symbols(abfd);
|
||
coff_write_linenumbers(abfd);
|
||
coff_write_relocs(abfd);
|
||
}
|
||
if (text_sec) {
|
||
internal_a.tsize = 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, (file_ptr) 0, 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;
|
||
}
|
||
|
||
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);
|
||
|
||
#ifdef _LIB
|
||
/* If this is a .lib section, bump the vma address so that it
|
||
winds up being the number of .lib sections output. This is
|
||
right for SVR3.2. Shared libraries should probably get more
|
||
generic support. Ian Taylor <ian@cygnus.com>. */
|
||
if (strcmp (section->name, _LIB) == 0)
|
||
++section->lma;
|
||
#endif
|
||
|
||
/* Don't write out bss sections - one way to do this is to
|
||
see if the filepos has not been set. */
|
||
if (section->filepos == 0)
|
||
return true;
|
||
|
||
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() */
|
||
|
||
/*
|
||
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() */
|
||
|
||
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 = coff_get_normalized_symtab(abfd)) == NULL) {
|
||
return (false);
|
||
} /* on error */
|
||
|
||
/* Allocate enough room for all the symbols in cached form */
|
||
cached_area =
|
||
(coff_symbol_type *)
|
||
bfd_alloc(abfd, (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 = (long) dst;
|
||
dst->symbol.section = coff_section_from_bfd_index(abfd,
|
||
src->u.syment.n_scnum);
|
||
dst->symbol.flags = 0;
|
||
dst->done_lineno = false;
|
||
|
||
switch (src->u.syment.n_sclass) {
|
||
#ifdef I960
|
||
case C_LEAFEXT:
|
||
#if 0
|
||
dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
|
||
dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
|
||
dst->symbol.flags |= BSF_NOT_AT_END;
|
||
#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;
|
||
|
||
obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
|
||
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() */
|
||
|
||
/*
|
||
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 && bfd_asymbol_bfd(ptr) == abfd \
|
||
&& !bfd_is_com_section(ptr->section) \
|
||
&& !(ptr->flags & BSF_OLD_COMMON)) \
|
||
{ \
|
||
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;
|
||
if (!coff_slurp_symbol_table(abfd))
|
||
return false;
|
||
native_relocs =
|
||
(RELOC *) buy_and_read(abfd,
|
||
asect->rel_filepos,
|
||
SEEK_SET,
|
||
(size_t) (RELSZ *
|
||
asect->reloc_count));
|
||
reloc_cache = (arelent *)
|
||
bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
|
||
|
||
if (reloc_cache == NULL) {
|
||
bfd_error = no_memory;
|
||
return false;
|
||
}
|
||
|
||
|
||
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)
|
||
{
|
||
/* @@ Should never be greater than count of symbols! */
|
||
if (dst.r_symndx >= obj_conv_table_size (abfd))
|
||
abort ();
|
||
cache_ptr->sym_ptr_ptr = symbols + obj_convert(abfd)[dst.r_symndx];
|
||
ptr = *(cache_ptr->sym_ptr_ptr);
|
||
}
|
||
else
|
||
{
|
||
cache_ptr->sym_ptr_ptr= bfd_abs_section.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;
|
||
}
|
||
|
||
#ifdef GNU960
|
||
file_ptr
|
||
coff_sym_filepos(abfd)
|
||
bfd *abfd;
|
||
{
|
||
return obj_sym_filepos(abfd);
|
||
}
|
||
#endif
|
||
|
||
#ifndef coff_reloc16_extra_cases
|
||
#define coff_reloc16_extra_cases dummy_reloc16_extra_cases
|
||
/* This works even if abort is not declared in any header file. */
|
||
static void
|
||
dummy_reloc16_extra_cases (abfd, seclet, reloc, data, src_ptr, dst_ptr)
|
||
bfd *abfd;
|
||
struct bfd_seclet *seclet;
|
||
arelent *reloc;
|
||
bfd_byte *data;
|
||
unsigned int *src_ptr;
|
||
unsigned int *dst_ptr;
|
||
{
|
||
fprintf(stderr, "%s\n", reloc->howto->name);
|
||
abort ();
|
||
}
|
||
#endif
|
||
|
||
static CONST bfd_coff_backend_data bfd_coff_std_swap_table = {
|
||
coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
|
||
coff_swap_aux_out, coff_swap_sym_out,
|
||
coff_swap_lineno_out, coff_swap_reloc_out,
|
||
coff_swap_filehdr_out, coff_swap_aouthdr_out,
|
||
coff_swap_scnhdr_out,
|
||
FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
|
||
#ifdef COFF_LONG_FILENAMES
|
||
true,
|
||
#else
|
||
false,
|
||
#endif
|
||
coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
|
||
coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
|
||
styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
|
||
coff_slurp_symbol_table, symname_in_debug_hook, coff_reloc16_extra_cases
|
||
};
|
||
|
||
#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 \
|
||
(void (*) PARAMS ((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
|
||
#define coff_bfd_seclet_link bfd_generic_seclet_link
|
||
#define coff_bfd_reloc_type_lookup \
|
||
((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
|