Google Git
Sign in
gnu / binutils-gdb / refs/heads/binutils-2_11-branch / . / bfd / coffcode.h
blob: 2cdc137699e7ff542bf8d53b8b38124311e31787 [file] [log] [blame]
/* Support for the generic parts of most COFF variants, for BFD.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001
Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
Most of this hacked by Steve Chamberlain,
sac@cygnus.com
*/
/*
SECTION
coff backends
BFD supports a number of different flavours of coff format.
The major differences between formats are the sizes and
alignments of fields in structures on disk, and the occasional
extra field.
Coff in all its varieties is implemented with a few common
files and a number of implementation specific files. For
example, The 88k bcs coff format is implemented in the file
@file{coff-m88k.c}. This file @code{#include}s
@file{coff/m88k.h} which defines the external structure of the
coff format for the 88k, and @file{coff/internal.h} which
defines the internal structure. @file{coff-m88k.c} also
defines the relocations used by the 88k format
@xref{Relocations}.
The Intel i960 processor version of coff is implemented in
@file{coff-i960.c}. This file has the same structure as
@file{coff-m88k.c}, except that it includes @file{coff/i960.h}
rather than @file{coff-m88k.h}.
SUBSECTION
Porting to a new version of coff
The recommended method is to select from the existing
implementations the version of coff which is most like the one
you want to use. For example, we'll say that i386 coff is
the one you select, and that your coff flavour is called foo.
Copy @file{i386coff.c} to @file{foocoff.c}, copy
@file{../include/coff/i386.h} to @file{../include/coff/foo.h},
and add the lines to @file{targets.c} and @file{Makefile.in}
so that your new back end is used. Alter the shapes of the
structures in @file{../include/coff/foo.h} so that they match
what you need. You will probably also have to add
@code{#ifdef}s to the code in @file{coff/internal.h} and
@file{coffcode.h} if your version of coff is too wild.
You can verify that your new BFD backend works quite simply by
building @file{objdump} from the @file{binutils} directory,
and making sure that its version of what's going on and your
host system's idea (assuming it has the pretty standard coff
dump utility, usually called @code{att-dump} or just
@code{dump}) are the same. Then clean up your code, and send
what you've done to Cygnus. Then your stuff will be in the
next release, and you won't have to keep integrating it.
SUBSECTION
How the coff backend works
SUBSUBSECTION
File layout
The Coff backend is split into generic routines that are
applicable to any Coff target and routines that are specific
to a particular target. The target-specific routines are
further split into ones which are basically the same for all
Coff targets except that they use the external symbol format
or use different values for certain constants.
The generic routines are in @file{coffgen.c}. These routines
work for any Coff target. They use some hooks into the target
specific code; the hooks are in a @code{bfd_coff_backend_data}
structure, one of which exists for each target.
The essentially similar target-specific routines are in
@file{coffcode.h}. This header file includes executable C code.
The various Coff targets first include the appropriate Coff
header file, make any special defines that are needed, and
then include @file{coffcode.h}.
Some of the Coff targets then also have additional routines in
the target source file itself.
For example, @file{coff-i960.c} includes
@file{coff/internal.h} and @file{coff/i960.h}. It then
defines a few constants, such as @code{I960}, and includes
@file{coffcode.h}. Since the i960 has complex relocation
types, @file{coff-i960.c} also includes some code to
manipulate the i960 relocs. This code is not in
@file{coffcode.h} because it would not be used by any other
target.
SUBSUBSECTION
Bit twiddling
Each flavour of coff supported in BFD has its own header file
describing the external layout of the structures. There is also
an internal description of the coff layout, in
@file{coff/internal.h}. A major function of the
coff backend is swapping the bytes and twiddling the bits to
translate the external form of the structures into the normal
internal form. This is all performed in the
@code{bfd_swap}_@i{thing}_@i{direction} routines. Some
elements are different sizes between different versions of
coff; it is the duty of the coff version specific include file
to override the definitions of various packing routines in
@file{coffcode.h}. E.g., the size of line number entry in coff is
sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
@code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
correct one. No doubt, some day someone will find a version of
coff which has a varying field size not catered to at the
moment. To port BFD, that person will have to add more @code{#defines}.
Three of the bit twiddling routines are exported to
@code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
and @code{coff_swap_lineno_in}. @code{GDB} reads the symbol
table on its own, but uses BFD to fix things up. More of the
bit twiddlers are exported for @code{gas};
@code{coff_swap_aux_out}, @code{coff_swap_sym_out},
@code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
@code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
@code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
of all the symbol table and reloc drudgery itself, thereby
saving the internal BFD overhead, but uses BFD to swap things
on the way out, making cross ports much safer. Doing so also
allows BFD (and thus the linker) to use the same header files
as @code{gas}, which makes one avenue to disaster disappear.
SUBSUBSECTION
Symbol reading
The simple canonical form for symbols used by BFD is not rich
enough to keep all the information available in a coff symbol
table. The back end gets around this problem by keeping the original
symbol table around, "behind the scenes".
When a symbol table is requested (through a call to
@code{bfd_canonicalize_symtab}), a request gets through to
@code{coff_get_normalized_symtab}. This reads the symbol table from
the coff file and swaps all the structures inside into the
internal form. It also fixes up all the pointers in the table
(represented in the file by offsets from the first symbol in
the table) into physical pointers to elements in the new
internal table. This involves some work since the meanings of
fields change depending upon context: a field that is a
pointer to another structure in the symbol table at one moment
may be the size in bytes of a structure at the next. Another
pass is made over the table. All symbols which mark file names
(<<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 the symbol was taken, and on
output the back end makes sure that the same destination target as
source target is present.
When the symbols have come from a coff file then all the
debugging information is preserved.
Symbol tables are provided for writing to the back end in a
vector of pointers to pointers. This allows applications like
the linker to accumulate and output large symbol tables
without having to do too much byte copying.
This function runs through the provided symbol table and
patches each symbol marked as a file place holder
(@code{C_FILE}) to point to the next file place holder in the
list. It also marks each @code{offset} field in the list with
the offset from the first symbol of the current symbol.
Another function of this procedure is to turn the canonical
value form of BFD into the form used by coff. Internally, BFD
expects symbol values to be offsets from a section base; so a
symbol physically at 0x120, but in a section starting at
0x100, would have the value 0x20. Coff expects symbols to
contain their final value, so symbols have their values
changed at this point to reflect their sum with their owning
section. This transformation uses the
<<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 into the index into the symbol table of the asymbol.
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 table to the file.
*/
/*
INTERNAL_DEFINITION
coff_symbol_type
DESCRIPTION
The hidden information for an <<asymbol>> is described in 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 value of this symbol be renumbered. Used for
. XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
.unsigned int fix_value : 1;
.
. {* Should the tag field of this symbol be renumbered.
. Created by coff_pointerize_aux. *}
.unsigned int fix_tag : 1;
.
. {* Should the endidx field of this symbol be renumbered.
. Created by coff_pointerize_aux. *}
.unsigned int fix_end : 1;
.
. {* Should the x_csect.x_scnlen field be renumbered.
. Created by coff_pointerize_aux. *}
.unsigned int fix_scnlen : 1;
.
. {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
. index into the line number entries. Set by
. coff_slurp_symbol_table. *}
.unsigned int fix_line : 1;
.
. {* The container for the symbol structure as read and translated
. from the file. *}
.
.union {
. union internal_auxent auxent;
. struct internal_syment syment;
. } u;
.} combined_entry_type;
.
.
.{* Each canonical asymbol really looks like this: *}
.
.typedef struct coff_symbol_struct
.{
. {* The actual symbol which the rest of BFD works with *}
.asymbol symbol;
.
. {* A pointer to the hidden information for this symbol *}
.combined_entry_type *native;
.
. {* A pointer to the linenumber information for this symbol *}
.struct lineno_cache_entry *lineno;
.
. {* Have the line numbers been relocated yet ? *}
.boolean done_lineno;
.} coff_symbol_type;
*/
#ifdef COFF_WITH_PE
#include "peicode.h"
#else
#include "coffswap.h"
#endif
#define STRING_SIZE_SIZE (4)
static long sec_to_styp_flags PARAMS ((const char *, flagword));
static flagword styp_to_sec_flags
PARAMS ((bfd *, PTR, const char *, asection *));
static boolean coff_bad_format_hook PARAMS ((bfd *, PTR));
static void coff_set_custom_section_alignment
PARAMS ((bfd *, asection *, const struct coff_section_alignment_entry *,
const unsigned int));
static boolean coff_new_section_hook PARAMS ((bfd *, asection *));
static boolean coff_set_arch_mach_hook PARAMS ((bfd *, PTR));
static boolean coff_write_relocs PARAMS ((bfd *, int));
static boolean coff_set_flags
PARAMS ((bfd *, unsigned int *, unsigned short *));
static boolean coff_set_arch_mach
PARAMS ((bfd *, enum bfd_architecture, unsigned long));
static boolean coff_compute_section_file_positions PARAMS ((bfd *));
static boolean coff_write_object_contents PARAMS ((bfd *));
static boolean coff_set_section_contents
PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
static PTR buy_and_read PARAMS ((bfd *, file_ptr, int, size_t));
static boolean coff_slurp_line_table PARAMS ((bfd *, asection *));
static boolean coff_slurp_symbol_table PARAMS ((bfd *));
static enum coff_symbol_classification coff_classify_symbol
PARAMS ((bfd *, struct internal_syment *));
static boolean coff_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **));
static long coff_canonicalize_reloc
PARAMS ((bfd *, asection *, arelent **, asymbol **));
#ifndef coff_mkobject_hook
static PTR coff_mkobject_hook PARAMS ((bfd *, PTR, PTR));
#endif
#ifdef COFF_WITH_PE
static flagword handle_COMDAT PARAMS ((bfd *, flagword, PTR, const char *, asection *));
#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 probably mirror the changes in styp_to_sec_flags(). */
#ifndef COFF_WITH_PE
/* Macros for setting debugging flags. */
#ifdef STYP_DEBUG
#define STYP_XCOFF_DEBUG STYP_DEBUG
#else
#define STYP_XCOFF_DEBUG STYP_INFO
#endif
#ifdef COFF_ALIGN_IN_S_FLAGS
#define STYP_DEBUG_INFO STYP_DSECT
#else
#define STYP_DEBUG_INFO STYP_INFO
#endif
static long
sec_to_styp_flags (sec_name, sec_flags)
CONST char *sec_name;
flagword sec_flags;
{
long styp_flags = 0;
if (!strcmp (sec_name, _TEXT))
{
styp_flags = STYP_TEXT;
}
else if (!strcmp (sec_name, _DATA))
{
styp_flags = STYP_DATA;
}
else if (!strcmp (sec_name, _BSS))
{
styp_flags = STYP_BSS;
#ifdef _COMMENT
}
else if (!strcmp (sec_name, _COMMENT))
{
styp_flags = STYP_INFO;
#endif /* _COMMENT */
#ifdef _LIB
}
else if (!strcmp (sec_name, _LIB))
{
styp_flags = STYP_LIB;
#endif /* _LIB */
#ifdef _LIT
}
else if (!strcmp (sec_name, _LIT))
{
styp_flags = STYP_LIT;
#endif /* _LIT */
}
else if (!strncmp (sec_name, ".debug", 6))
{
/* Handle the XCOFF debug section and DWARF2 debug sections. */
if (!sec_name[6])
styp_flags = STYP_XCOFF_DEBUG;
else
styp_flags = STYP_DEBUG_INFO;
}
else if (!strncmp (sec_name, ".stab", 5))
{
styp_flags = STYP_DEBUG_INFO;
}
#ifdef COFF_LONG_SECTION_NAMES
else if (!strncmp (sec_name, ".gnu.linkonce.wi.", 17))
{
styp_flags = STYP_DEBUG_INFO;
}
#endif
#ifdef RS6000COFF_C
else if (!strcmp (sec_name, _PAD))
{
styp_flags = STYP_PAD;
}
else if (!strcmp (sec_name, _LOADER))
{
styp_flags = STYP_LOADER;
}
#endif
/* Try and figure out what it should be */
else if (sec_flags & SEC_CODE)
{
styp_flags = STYP_TEXT;
}
else if (sec_flags & SEC_DATA)
{
styp_flags = STYP_DATA;
}
else if (sec_flags & SEC_READONLY)
{
#ifdef STYP_LIT /* 29k readonly text/data section */
styp_flags = STYP_LIT;
#else
styp_flags = STYP_TEXT;
#endif /* STYP_LIT */
}
else if (sec_flags & SEC_LOAD)
{
styp_flags = STYP_TEXT;
}
else if (sec_flags & SEC_ALLOC)
{
styp_flags = STYP_BSS;
}
#ifdef STYP_CLINK
if (sec_flags & SEC_CLINK)
styp_flags |= STYP_CLINK;
#endif
#ifdef STYP_BLOCK
if (sec_flags & SEC_BLOCK)
styp_flags |= STYP_BLOCK;
#endif
#ifdef STYP_NOLOAD
if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
styp_flags |= STYP_NOLOAD;
#endif
return styp_flags;
}
#else /* COFF_WITH_PE */
/* The PE version; see above for the general comments. The non-PE
case seems to be more guessing, and breaks PE format; specifically,
.rdata is readonly, but it sure ain't text. Really, all this
should be set up properly in gas (or whatever assembler is in use),
and honor whatever objcopy/strip, etc. sent us as input. */
static long
sec_to_styp_flags (sec_name, sec_flags)
const char *sec_name ATTRIBUTE_UNUSED;
flagword sec_flags;
{
long styp_flags = 0;
/* caution: there are at least three groups of symbols that have
very similar bits and meanings: IMAGE_SCN*, SEC_*, and STYP_*.
SEC_* are the BFD internal flags, used for generic BFD
information. STYP_* are the COFF section flags which appear in
COFF files. IMAGE_SCN_* are the PE section flags which appear in
PE files. The STYP_* flags and the IMAGE_SCN_* flags overlap,
but there are more IMAGE_SCN_* flags. */
/* skip LOAD */
/* READONLY later */
/* skip RELOC */
if ((sec_flags & SEC_CODE) != 0)
styp_flags |= IMAGE_SCN_CNT_CODE;
if ((sec_flags & SEC_DATA) != 0)
styp_flags |= IMAGE_SCN_CNT_INITIALIZED_DATA;
if ((sec_flags & SEC_ALLOC) != 0 && (sec_flags & SEC_LOAD) == 0)
styp_flags |= IMAGE_SCN_CNT_UNINITIALIZED_DATA; /* ==STYP_BSS */
/* skip ROM */
/* skip CONSTRUCTOR */
/* skip CONTENTS */
#ifdef STYP_NOLOAD
if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
styp_flags |= STYP_NOLOAD;
#endif
if ((sec_flags & SEC_IS_COMMON) != 0)
styp_flags |= IMAGE_SCN_LNK_COMDAT;
if ((sec_flags & SEC_DEBUGGING) != 0)
styp_flags |= IMAGE_SCN_MEM_DISCARDABLE;
if ((sec_flags & SEC_EXCLUDE) != 0)
styp_flags |= IMAGE_SCN_LNK_REMOVE;
if ((sec_flags & SEC_NEVER_LOAD) != 0)
styp_flags |= IMAGE_SCN_LNK_REMOVE;
/* skip IN_MEMORY */
/* skip SORT */
if (sec_flags & SEC_LINK_ONCE)
styp_flags |= IMAGE_SCN_LNK_COMDAT;
/* skip LINK_DUPLICATES */
/* skip LINKER_CREATED */
/* For now, the read/write bits are mapped onto SEC_READONLY, even
though the semantics don't quite match. The bits from the input
are retained in pei_section_data(abfd, section)->pe_flags */
styp_flags |= IMAGE_SCN_MEM_READ; /* always readable. */
if ((sec_flags & SEC_READONLY) == 0)
styp_flags |= IMAGE_SCN_MEM_WRITE; /* Invert READONLY for write */
if (sec_flags & SEC_CODE)
styp_flags |= IMAGE_SCN_MEM_EXECUTE; /* CODE->EXECUTE */
if (sec_flags & SEC_SHARED)
styp_flags |= IMAGE_SCN_MEM_SHARED; /* Shared remains meaningful */
return styp_flags;
}
#endif /* COFF_WITH_PE */
/* 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 probably mirror the changes in sec_to_styp_flags(). */
#ifndef COFF_WITH_PE
static flagword
styp_to_sec_flags (abfd, hdr, name, section)
bfd *abfd ATTRIBUTE_UNUSED;
PTR hdr;
const char *name;
asection *section ATTRIBUTE_UNUSED;
{
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
long styp_flags = internal_s->s_flags;
flagword sec_flags = 0;
#ifdef STYP_BLOCK
if (styp_flags & STYP_BLOCK)
sec_flags |= SEC_BLOCK;
#endif
#ifdef STYP_CLINK
if (styp_flags & STYP_CLINK)
sec_flags |= SEC_CLINK;
#endif
#ifdef STYP_NOLOAD
if (styp_flags & STYP_NOLOAD)
{
sec_flags |= SEC_NEVER_LOAD;
}
#endif /* STYP_NOLOAD */
/* For 386 COFF, at least, an unloadable text or data section is
actually a shared library section. */
if (styp_flags & STYP_TEXT)
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
else
sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
}
else if (styp_flags & STYP_DATA)
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
else
sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
}
else if (styp_flags & STYP_BSS)
{
#ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
else
#endif
sec_flags |= SEC_ALLOC;
}
else if (styp_flags & STYP_INFO)
{
/* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
defined. coff_compute_section_file_positions uses
COFF_PAGE_SIZE to ensure that the low order bits of the
section VMA and the file offset match. If we don't know
COFF_PAGE_SIZE, we can't ensure the correct correspondence,
and demand page loading of the file will fail. */
#if defined (COFF_PAGE_SIZE) && !defined (COFF_ALIGN_IN_S_FLAGS)
sec_flags |= SEC_DEBUGGING;
#endif
}
else if (styp_flags & STYP_PAD)
{
sec_flags = 0;
}
else if (strcmp (name, _TEXT) == 0)
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
else
sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
}
else if (strcmp (name, _DATA) == 0)
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
else
sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
}
else if (strcmp (name, _BSS) == 0)
{
#ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
else
#endif
sec_flags |= SEC_ALLOC;
}
else if (strncmp (name, ".debug", 6) == 0
#ifdef _COMMENT
|| strcmp (name, _COMMENT) == 0
#endif
#ifdef COFF_LONG_SECTION_NAMES
|| strncmp (name, ".gnu.linkonce.wi.", 17) == 0
#endif
|| strncmp (name, ".stab", 5) == 0)
{
#ifdef COFF_PAGE_SIZE
sec_flags |= SEC_DEBUGGING;
#endif
}
#ifdef _LIB
else if (strcmp (name, _LIB) == 0)
;
#endif
#ifdef _LIT
else if (strcmp (name, _LIT) == 0)
{
sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
}
#endif
else
{
sec_flags |= SEC_ALLOC | SEC_LOAD;
}
#ifdef STYP_LIT /* A29k readonly text/data section type */
if ((styp_flags & STYP_LIT) == STYP_LIT)
{
sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
}
#endif /* STYP_LIT */
#ifdef STYP_OTHER_LOAD /* Other loaded sections */
if (styp_flags & STYP_OTHER_LOAD)
{
sec_flags = (SEC_LOAD | SEC_ALLOC);
}
#endif /* STYP_SDATA */
#if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
/* As a GNU extension, if the name begins with .gnu.linkonce, we
only link a single copy of the section. This is used to support
g++. g++ will emit each template expansion in its own section.
The symbols will be defined as weak, so that multiple definitions
are permitted. The GNU linker extension is to actually discard
all but one of the sections. */
if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
#endif
return sec_flags;
}
#else /* COFF_WITH_PE */
static flagword
handle_COMDAT (abfd, sec_flags, hdr, name, section)
bfd * abfd;
flagword sec_flags;
PTR hdr;
const char *name;
asection *section;
{
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
bfd_byte *esymstart, *esym, *esymend;
int seen_state = 0;
char *target_name = NULL;
sec_flags |= SEC_LINK_ONCE;
/* Unfortunately, the PE format stores essential information in
the symbol table, of all places. We need to extract that
information now, so that objdump and the linker will know how
to handle the section without worrying about the symbols. We
can't call slurp_symtab, because the linker doesn't want the
swapped symbols. */
/* COMDAT sections are special. The first symbol is the section
symbol, which tells what kind of COMDAT section it is. The
second symbol is the "comdat symbol" - the one with the
unique name. GNU uses the section symbol for the unique
name; MS uses ".text" for every comdat section. Sigh. - DJ */
/* This is not mirrored in sec_to_styp_flags(), but there
doesn't seem to be a need to, either, and it would at best be
rather messy. */
if (! _bfd_coff_get_external_symbols (abfd))
return sec_flags;
esymstart = esym = (bfd_byte *) obj_coff_external_syms (abfd);
esymend = esym + obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
while (esym < esymend)
{
struct internal_syment isym;
char buf[SYMNMLEN + 1];
const char *symname;
bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &isym);
if (sizeof (internal_s->s_name) > SYMNMLEN)
{
/* This case implies that the matching
symbol name will be in the string table. */
abort ();
}
if (isym.n_scnum == section->target_index)
{
/* According to the MSVC documentation, the first
TWO entries with the section # are both of
interest to us. The first one is the "section
symbol" (section name). The second is the comdat
symbol name. Here, we've found the first
qualifying entry; we distinguish it from the
second with a state flag.
In the case of gas-generated (at least until that
is fixed) .o files, it isn't necessarily the
second one. It may be some other later symbol.
Since gas also doesn't follow MS conventions and
emits the section similar to .text$<name>, where
<something> is the name we're looking for, we
distinguish the two as follows:
If the section name is simply a section name (no
$) we presume it's MS-generated, and look at
precisely the second symbol for the comdat name.
If the section name has a $, we assume it's
gas-generated, and look for <something> (whatever
follows the $) as the comdat symbol. */
/* All 3 branches use this */
symname = _bfd_coff_internal_syment_name (abfd, &isym, buf);
if (symname == NULL)
abort ();
switch (seen_state)
{
case 0:
{
/* The first time we've seen the symbol. */
union internal_auxent aux;
seen_state = 1;
/* If it isn't the stuff we're expecting, die;
The MS documentation is vague, but it
appears that the second entry serves BOTH
as the comdat symbol and the defining
symbol record (either C_STAT or C_EXT,
possibly with an aux entry with debug
information if it's a function.) It
appears the only way to find the second one
is to count. (On Intel, they appear to be
adjacent, but on Alpha, they have been
found separated.)
Here, we think we've found the first one,
but there's some checking we can do to be
sure. */
if (! (isym.n_sclass == C_STAT
&& isym.n_type == T_NULL
&& isym.n_value == 0))
abort ();
/* FIXME LATER: MSVC generates section names
like .text for comdats. Gas generates
names like .text$foo__Fv (in the case of a
function). See comment above for more. */
if (strcmp (name, symname) != 0)
abort ();
/* This is the section symbol. */
bfd_coff_swap_aux_in (abfd, (PTR) (esym + bfd_coff_symesz (abfd)),
isym.n_type, isym.n_sclass,
0, isym.n_numaux, (PTR) &aux);
target_name = strchr (name, '$');
if (target_name != NULL)
{
/* Gas mode. */
seen_state = 2;
/* Skip the `$'. */
target_name += 1;
}
/* FIXME: Microsoft uses NODUPLICATES and
ASSOCIATIVE, but gnu uses ANY and
SAME_SIZE. Unfortunately, gnu doesn't do
the comdat symbols right. So, until we can
fix it to do the right thing, we are
temporarily disabling comdats for the MS
types (they're used in DLLs and C++, but we
don't support *their* C++ libraries anyway
- DJ. */
/* Cygwin does not follow the MS style, and
uses ANY and SAME_SIZE where NODUPLICATES
and ASSOCIATIVE should be used. For
Interix, we just do the right thing up
front. */
switch (aux.x_scn.x_comdat)
{
case IMAGE_COMDAT_SELECT_NODUPLICATES:
#ifdef STRICT_PE_FORMAT
sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
#else
sec_flags &= ~SEC_LINK_ONCE;
#endif
break;
case IMAGE_COMDAT_SELECT_ANY:
sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
break;
case IMAGE_COMDAT_SELECT_SAME_SIZE:
sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
break;
case IMAGE_COMDAT_SELECT_EXACT_MATCH:
/* Not yet fully implemented ??? */
sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
break;
/* debug$S gets this case; other
implications ??? */
/* There may be no symbol... we'll search
the whole table... Is this the right
place to play this game? Or should we do
it when reading it in. */
case IMAGE_COMDAT_SELECT_ASSOCIATIVE:
#ifdef STRICT_PE_FORMAT
/* FIXME: This is not currently implemented. */
sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
#else
sec_flags &= ~SEC_LINK_ONCE;
#endif
break;
default: /* 0 means "no symbol" */
/* debug$F gets this case; other
implications ??? */
sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
break;
}
}
break;
case 2:
/* Gas mode: the first matching on partial name. */
#ifndef TARGET_UNDERSCORE
#define TARGET_UNDERSCORE 0
#endif
/* Is this the name we're looking for? */
if (strcmp (target_name,
symname + (TARGET_UNDERSCORE ? 1 : 0)) != 0)
{
/* Not the name we're looking for */
esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd);
continue;
}
/* Fall through. */
case 1:
/* MSVC mode: the lexically second symbol (or
drop through from the above). */
{
char *newname;
/* This must the the second symbol with the
section #. It is the actual symbol name.
Intel puts the two adjacent, but Alpha (at
least) spreads them out. */
section->comdat =
bfd_alloc (abfd, sizeof (struct bfd_comdat_info));
if (section->comdat == NULL)
abort ();
section->comdat->symbol =
(esym - esymstart) / bfd_coff_symesz (abfd);
newname = bfd_alloc (abfd, strlen (symname) + 1);
if (newname == NULL)
abort ();
strcpy (newname, symname);
section->comdat->name = newname;
}
goto breakloop;
}
}
esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd);
}
breakloop:
return sec_flags;
}
/* The PE version; see above for the general comments.
Since to set the SEC_LINK_ONCE and associated flags, we have to
look at the symbol table anyway, we return the symbol table index
of the symbol being used as the COMDAT symbol. This is admittedly
ugly, but there's really nowhere else that we have access to the
required information. FIXME: Is the COMDAT symbol index used for
any purpose other than objdump? */
static flagword
styp_to_sec_flags (abfd, hdr, name, section)
bfd *abfd;
PTR hdr;
const char *name;
asection *section;
{
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
long styp_flags = internal_s->s_flags;
flagword sec_flags;
/* Assume read only unless IMAGE_SCN_MEM_WRITE is specified. */
sec_flags = SEC_READONLY;
/* Process each flag bit in styp_flags in turn. */
while (styp_flags)
{
long flag = styp_flags & - styp_flags;
char * unhandled = NULL;
styp_flags &= ~ flag;
/* We infer from the distinct read/write/execute bits the settings
of some of the bfd flags; the actual values, should we need them,
are also in pei_section_data (abfd, section)->pe_flags. */
switch (flag)
{
case STYP_DSECT:
unhandled = "STYP_DSECT";
break;
case STYP_GROUP:
unhandled = "STYP_GROUP";
break;
case STYP_COPY:
unhandled = "STYP_COPY";
break;
case STYP_OVER:
unhandled = "STYP_OVER";
break;
#ifdef SEC_NEVER_LOAD
case STYP_NOLOAD:
sec_flags |= SEC_NEVER_LOAD;
break;
#endif
case IMAGE_SCN_MEM_READ:
/* Ignored, assume it always to be true. */
break;
case IMAGE_SCN_TYPE_NO_PAD:
/* Skip. */
break;
case IMAGE_SCN_LNK_OTHER:
unhandled = "IMAGE_SCN_LNK_OTHER";
break;
case IMAGE_SCN_MEM_NOT_CACHED:
unhandled = "IMAGE_SCN_MEM_NOT_CACHED";
break;
case IMAGE_SCN_MEM_NOT_PAGED:
unhandled = "IMAGE_SCN_MEM_NOT_PAGED";
break;
case IMAGE_SCN_MEM_EXECUTE:
sec_flags |= SEC_CODE;
break;
case IMAGE_SCN_MEM_WRITE:
sec_flags &= ~ SEC_READONLY;
break;
case IMAGE_SCN_MEM_DISCARDABLE:
sec_flags |= SEC_DEBUGGING;
break;
case IMAGE_SCN_MEM_SHARED:
sec_flags |= SEC_SHARED;
break;
case IMAGE_SCN_LNK_REMOVE:
sec_flags |= SEC_EXCLUDE;
break;
case IMAGE_SCN_CNT_CODE:
sec_flags |= SEC_CODE | SEC_ALLOC | SEC_LOAD;
break;
case IMAGE_SCN_CNT_INITIALIZED_DATA:
sec_flags |= SEC_DATA | SEC_ALLOC | SEC_LOAD;
break;
case IMAGE_SCN_CNT_UNINITIALIZED_DATA:
sec_flags |= SEC_ALLOC;
break;
case IMAGE_SCN_LNK_INFO:
/* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
defined. coff_compute_section_file_positions uses
COFF_PAGE_SIZE to ensure that the low order bits of the
section VMA and the file offset match. If we don't know
COFF_PAGE_SIZE, we can't ensure the correct correspondence,
and demand page loading of the file will fail. */
#ifdef COFF_PAGE_SIZE
sec_flags |= SEC_DEBUGGING;
#endif
break;
case IMAGE_SCN_LNK_COMDAT:
/* COMDAT gets very special treatment. */
sec_flags = handle_COMDAT (abfd, sec_flags, hdr, name, section);
break;
default:
/* Silently ignore for now. */
break;
}
/* If the section flag was not handled, report it here. This will allow
users of the BFD library to report a problem but continue executing.
Tools which need to be aware of these problems (such as the linker)
can override the default bfd_error_handler to intercept these reports. */
if (unhandled != NULL)
(*_bfd_error_handler)
(_("%s (%s): Section flag %s (0x%x) ignored"),
bfd_get_filename (abfd), name, unhandled, flag);
}
#if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
/* As a GNU extension, if the name begins with .gnu.linkonce, we
only link a single copy of the section. This is used to support
g++. g++ will emit each template expansion in its own section.
The symbols will be defined as weak, so that multiple definitions
are permitted. The GNU linker extension is to actually discard
all but one of the sections. */
if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
#endif
return sec_flags;
}
#endif /* COFF_WITH_PE */
#define get_index(symbol) ((symbol)->udata.i)
/*
INTERNAL_DEFINITION
bfd_coff_backend_data
CODE_FRAGMENT
.{* COFF symbol classifications. *}
.
.enum coff_symbol_classification
.{
. {* Global symbol. *}
. COFF_SYMBOL_GLOBAL,
. {* Common symbol. *}
. COFF_SYMBOL_COMMON,
. {* Undefined symbol. *}
. COFF_SYMBOL_UNDEFINED,
. {* Local symbol. *}
. COFF_SYMBOL_LOCAL,
. {* PE section symbol. *}
. COFF_SYMBOL_PE_SECTION
.};
.
Special entry points for gdb to swap in coff symbol table parts:
.typedef struct
.{
. void (*_bfd_coff_swap_aux_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. int type,
. int class,
. int indaux,
. int numaux,
. PTR in));
.
. void (*_bfd_coff_swap_sym_in) PARAMS ((
. bfd *abfd ,
. PTR ext,
. PTR in));
.
. void (*_bfd_coff_swap_lineno_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. PTR in));
.
Special entry points for gas to swap out coff parts:
. unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
. bfd *abfd,
. PTR in,
. int type,
. int class,
. int indaux,
. int numaux,
. PTR ext));
.
. unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
. bfd *abfd,
. PTR in,
. PTR ext));
.
. unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
. bfd *abfd,
. PTR in,
. PTR ext));
.
. unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
. bfd *abfd,
. PTR src,
. PTR dst));
.
. unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
. bfd *abfd,
. PTR in,
. PTR out));
.
. unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
. bfd *abfd,
. PTR in,
. PTR out));
.
. unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
. bfd *abfd,
. PTR in,
. PTR out));
.
Special entry points for generic COFF routines to call target
dependent COFF routines:
. unsigned int _bfd_filhsz;
. unsigned int _bfd_aoutsz;
. unsigned int _bfd_scnhsz;
. unsigned int _bfd_symesz;
. unsigned int _bfd_auxesz;
. unsigned int _bfd_relsz;
. unsigned int _bfd_linesz;
. unsigned int _bfd_filnmlen;
. boolean _bfd_coff_long_filenames;
. boolean _bfd_coff_long_section_names;
. unsigned int _bfd_coff_default_section_alignment_power;
. boolean _bfd_coff_force_symnames_in_strings;
. unsigned int _bfd_coff_debug_string_prefix_length;
. void (*_bfd_coff_swap_filehdr_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. PTR in));
. void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. PTR in));
. void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. PTR in));
. void (*_bfd_coff_swap_reloc_in) PARAMS ((
. bfd *abfd,
. PTR ext,
. PTR in));
. boolean (*_bfd_coff_bad_format_hook) PARAMS ((
. bfd *abfd,
. PTR internal_filehdr));
. boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
. bfd *abfd,
. PTR internal_filehdr));
. PTR (*_bfd_coff_mkobject_hook) PARAMS ((
. bfd *abfd,
. PTR internal_filehdr,
. PTR internal_aouthdr));
. flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
. bfd *abfd,
. PTR internal_scnhdr,
. const char *name,
. asection *section));
. void (*_bfd_set_alignment_hook) PARAMS ((
. bfd *abfd,
. asection *sec,
. PTR internal_scnhdr));
. boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
. bfd *abfd));
. boolean (*_bfd_coff_symname_in_debug) PARAMS ((
. bfd *abfd,
. struct internal_syment *sym));
. boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
. bfd *abfd,
. combined_entry_type *table_base,
. combined_entry_type *symbol,
. unsigned int indaux,
. combined_entry_type *aux));
. boolean (*_bfd_coff_print_aux) PARAMS ((
. bfd *abfd,
. FILE *file,
. combined_entry_type *table_base,
. combined_entry_type *symbol,
. combined_entry_type *aux,
. unsigned int indaux));
. void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
. bfd *abfd,
. struct bfd_link_info *link_info,
. struct bfd_link_order *link_order,
. arelent *reloc,
. bfd_byte *data,
. unsigned int *src_ptr,
. unsigned int *dst_ptr));
. int (*_bfd_coff_reloc16_estimate) PARAMS ((
. bfd *abfd,
. asection *input_section,
. arelent *r,
. unsigned int shrink,
. struct bfd_link_info *link_info));
. enum coff_symbol_classification (*_bfd_coff_classify_symbol) PARAMS ((
. bfd *abfd,
. struct internal_syment *));
. boolean (*_bfd_coff_compute_section_file_positions) PARAMS ((
. bfd *abfd));
. boolean (*_bfd_coff_start_final_link) PARAMS ((
. bfd *output_bfd,
. struct bfd_link_info *info));
. boolean (*_bfd_coff_relocate_section) PARAMS ((
. bfd *output_bfd,
. struct bfd_link_info *info,
. bfd *input_bfd,
. asection *input_section,
. bfd_byte *contents,
. struct internal_reloc *relocs,
. struct internal_syment *syms,
. asection **sections));
. reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
. bfd *abfd,
. asection *sec,
. struct internal_reloc *rel,
. struct coff_link_hash_entry *h,
. struct internal_syment *sym,
. bfd_vma *addendp));
. boolean (*_bfd_coff_adjust_symndx) PARAMS ((
. bfd *obfd,
. struct bfd_link_info *info,
. bfd *ibfd,
. asection *sec,
. struct internal_reloc *reloc,
. boolean *adjustedp));
. boolean (*_bfd_coff_link_add_one_symbol) PARAMS ((
. struct bfd_link_info *info,
. bfd *abfd,
. const char *name,
. flagword flags,
. asection *section,
. bfd_vma value,
. const char *string,
. boolean copy,
. boolean collect,
. struct bfd_link_hash_entry **hashp));
.
. boolean (*_bfd_coff_link_output_has_begun) PARAMS ((
. bfd * abfd,
. struct coff_final_link_info * pfinfo));
. boolean (*_bfd_coff_final_link_postscript) PARAMS ((
. bfd * abfd,
. struct coff_final_link_info * pfinfo));
.
.} bfd_coff_backend_data;
.
.#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
.
.#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
. ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
.
.#define bfd_coff_swap_sym_in(a,e,i) \
. ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
.
.#define bfd_coff_swap_lineno_in(a,e,i) \
. ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
.
.#define bfd_coff_swap_reloc_out(abfd, i, o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
.
.#define bfd_coff_swap_lineno_out(abfd, i, o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
.
.#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
. ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
.
.#define bfd_coff_swap_sym_out(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
.
.#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
.
.#define bfd_coff_swap_filehdr_out(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
.
.#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
.
.#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
.#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
.#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
.#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
.#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
.#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
.#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
.#define bfd_coff_filnmlen(abfd) (coff_backend_info (abfd)->_bfd_filnmlen)
.#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
.#define bfd_coff_long_section_names(abfd) \
. (coff_backend_info (abfd)->_bfd_coff_long_section_names)
.#define bfd_coff_default_section_alignment_power(abfd) \
. (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
.#define bfd_coff_swap_filehdr_in(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
.
.#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
.
.#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
.
.#define bfd_coff_swap_reloc_in(abfd, i, o) \
. ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
.
.#define bfd_coff_bad_format_hook(abfd, filehdr) \
. ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
.
.#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
. ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
.#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
. ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
.
.#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name, section)\
. ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\
. (abfd, scnhdr, name, section))
.
.#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_force_symnames_in_strings(abfd)\
. (coff_backend_info (abfd)->_bfd_coff_force_symnames_in_strings)
.
.#define bfd_coff_debug_string_prefix_length(abfd)\
. (coff_backend_info (abfd)->_bfd_coff_debug_string_prefix_length)
.
.#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
. ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
. (abfd, file, base, symbol, aux, indaux))
.
.#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
. ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
. (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
.
.#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
. ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
. (abfd, section, reloc, shrink, link_info))
.
.#define bfd_coff_classify_symbol(abfd, sym)\
. ((coff_backend_info (abfd)->_bfd_coff_classify_symbol)\
. (abfd, sym))
.
.#define bfd_coff_compute_section_file_positions(abfd)\
. ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
. (abfd))
.
.#define bfd_coff_start_final_link(obfd, info)\
. ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
. (obfd, info))
.#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
. ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
. (obfd, info, ibfd, o, con, rel, isyms, secs))
.#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
. ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
. (abfd, sec, rel, h, sym, addendp))
.#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
. ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
. (obfd, info, ibfd, sec, rel, adjustedp))
.#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\
. ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
. (info, abfd, name, flags, section, value, string, cp, coll, hashp))
.
.#define bfd_coff_link_output_has_begun(a,p) \
. ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a,p))
.#define bfd_coff_final_link_postscript(a,p) \
. ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a,p))
.
*/
/* See whether the magic number matches. */
static boolean
coff_bad_format_hook (abfd, filehdr)
bfd * abfd ATTRIBUTE_UNUSED;
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 && bfd_coff_aoutsz (abfd) != internal_f->f_opthdr)
return false;
#endif
return true;
}
/* Check whether this section uses an alignment other than the
default. */
static void
coff_set_custom_section_alignment (abfd, section, alignment_table, table_size)
bfd *abfd ATTRIBUTE_UNUSED;
asection *section;
const struct coff_section_alignment_entry *alignment_table;
const unsigned int table_size;
{
const unsigned int default_alignment = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
unsigned int i;
for (i = 0; i < table_size; ++i)
{
const char *secname = bfd_get_section_name (abfd, section);
if (alignment_table[i].comparison_length == (unsigned int) -1
? strcmp (alignment_table[i].name, secname) == 0
: strncmp (alignment_table[i].name, secname,
alignment_table[i].comparison_length) == 0)
break;
}
if (i >= table_size)
return;
if (alignment_table[i].default_alignment_min != COFF_ALIGNMENT_FIELD_EMPTY
&& default_alignment < alignment_table[i].default_alignment_min)
return;
if (alignment_table[i].default_alignment_max != COFF_ALIGNMENT_FIELD_EMPTY
&& default_alignment > alignment_table[i].default_alignment_max)
return;
section->alignment_power = alignment_table[i].alignment_power;
}
/* Custom section alignment records. */
static const struct coff_section_alignment_entry
coff_section_alignment_table[] =
{
#ifdef COFF_SECTION_ALIGNMENT_ENTRIES
COFF_SECTION_ALIGNMENT_ENTRIES,
#endif
/* There must not be any gaps between .stabstr sections. */
{ COFF_SECTION_NAME_PARTIAL_MATCH (".stabstr"),
1, COFF_ALIGNMENT_FIELD_EMPTY, 0 },
/* The .stab section must be aligned to 2**2 at most, to avoid gaps. */
{ COFF_SECTION_NAME_PARTIAL_MATCH (".stab"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
/* Similarly for the .ctors and .dtors sections. */
{ COFF_SECTION_NAME_EXACT_MATCH (".ctors"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
{ COFF_SECTION_NAME_EXACT_MATCH (".dtors"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 }
};
static const unsigned int coff_section_alignment_table_size =
sizeof coff_section_alignment_table / sizeof coff_section_alignment_table[0];
/* Initialize a section structure with information peculiar to this
particular implementation of COFF. */
static boolean
coff_new_section_hook (abfd, section)
bfd * abfd;
asection * section;
{
combined_entry_type *native;
section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
#ifdef RS6000COFF_C
if (xcoff_data (abfd)->text_align_power != 0
&& strcmp (bfd_get_section_name (abfd, section), ".text") == 0)
section->alignment_power = xcoff_data (abfd)->text_align_power;
if (xcoff_data (abfd)->data_align_power != 0
&& strcmp (bfd_get_section_name (abfd, section), ".data") == 0)
section->alignment_power = xcoff_data (abfd)->data_align_power;
#endif
/* Allocate aux records for section symbols, to store size and
related info.
@@ The 10 is a guess at a plausible maximum number of aux entries
(but shouldn't be a constant). */
native = ((combined_entry_type *)
bfd_zalloc (abfd, sizeof (combined_entry_type) * 10));
if (native == NULL)
return false;
/* We don't need to set up n_name, n_value, or n_scnum in the native
symbol information, since they'll be overriden by the BFD symbol
anyhow. However, we do need to set the type and storage class,
in case this symbol winds up getting written out. The value 0
for n_numaux is already correct. */
native->u.syment.n_type = T_NULL;
native->u.syment.n_sclass = C_STAT;
coffsymbol (section->symbol)->native = native;
coff_set_custom_section_alignment (abfd, section,
coff_section_alignment_table,
coff_section_alignment_table_size);
return true;
}
#ifdef COFF_ALIGN_IN_SECTION_HEADER
/* Set the alignment of a BFD section. */
static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
static void
coff_set_alignment_hook (abfd, section, scnhdr)
bfd * abfd ATTRIBUTE_UNUSED;
asection * section;
PTR scnhdr;
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
unsigned int i;
#ifdef I960
/* Extract ALIGN from 2**ALIGN stored in section header */
for (i = 0; i < 32; i++)
if ((1 << i) >= hdr->s_align)
break;
#endif
#ifdef TIC80COFF
/* TI tools puts the alignment power in bits 8-11 */
i = (hdr->s_flags >> 8) & 0xF ;
#endif
#ifdef COFF_DECODE_ALIGNMENT
i = COFF_DECODE_ALIGNMENT(hdr->s_flags);
#endif
section->alignment_power = i;
#ifdef coff_set_section_load_page
coff_set_section_load_page (section, hdr->s_page);
#endif
}
#else /* ! COFF_ALIGN_IN_SECTION_HEADER */
#ifdef COFF_WITH_PE
/* a couple of macros to help setting the alignment power field */
#define ALIGN_SET(field,x,y) \
if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
{\
section->alignment_power = y;\
}
#define ELIFALIGN_SET(field,x,y) \
else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
{\
section->alignment_power = y;\
}
static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
static void
coff_set_alignment_hook (abfd, section, scnhdr)
bfd * abfd ATTRIBUTE_UNUSED;
asection * section;
PTR scnhdr;
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
ALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_64BYTES, 6)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_32BYTES, 5)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_16BYTES, 4)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_8BYTES, 3)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_4BYTES, 2)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_2BYTES, 1)
ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_1BYTES, 0)
/* In a PE image file, the s_paddr field holds the virtual size of a
section, while the s_size field holds the raw size. We also keep
the original section flag value, since not every bit can be
mapped onto a generic BFD section bit. */
if (coff_section_data (abfd, section) == NULL)
{
section->used_by_bfd =
(PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
if (section->used_by_bfd == NULL)
{
/* FIXME: Return error. */
abort ();
}
}
if (pei_section_data (abfd, section) == NULL)
{
coff_section_data (abfd, section)->tdata =
(PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
if (coff_section_data (abfd, section)->tdata == NULL)
{
/* FIXME: Return error. */
abort ();
}
}
pei_section_data (abfd, section)->virt_size = hdr->s_paddr;
pei_section_data (abfd, section)->pe_flags = hdr->s_flags;
section->lma = hdr->s_vaddr;
/* check for extended relocs */
if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL)
{
struct external_reloc dst;
struct internal_reloc n;
int oldpos = bfd_tell (abfd);
bfd_seek (abfd, hdr->s_relptr, 0);
if (bfd_read ((PTR) & dst, 1, bfd_coff_relsz (abfd), abfd)
!= bfd_coff_relsz (abfd))
return;
coff_swap_reloc_in (abfd, &dst, &n);
bfd_seek (abfd, oldpos, 0);
section->reloc_count =
hdr->s_nreloc = n.r_vaddr;
}
}
#undef ALIGN_SET
#undef ELIFALIGN_SET
#else /* ! COFF_WITH_PE */
#ifdef RS6000COFF_C
/* We grossly abuse this function to handle XCOFF overflow headers.
When we see one, we correct the reloc and line number counts in the
real header, and remove the section we just created. */
static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
static void
coff_set_alignment_hook (abfd, section, scnhdr)
bfd *abfd;
asection *section;
PTR scnhdr;
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
asection *real_sec;
asection **ps;
if ((hdr->s_flags & STYP_OVRFLO) == 0)
return;
real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc);
if (real_sec == NULL)
return;
real_sec->reloc_count = hdr->s_paddr;
real_sec->lineno_count = hdr->s_vaddr;
for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next)
{
if (*ps == section)
{
*ps = (*ps)->next;
--abfd->section_count;
break;
}
}
}
#else /* ! RS6000COFF_C */
#define coff_set_alignment_hook \
((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
#endif /* ! RS6000COFF_C */
#endif /* ! COFF_WITH_PE */
#endif /* ! COFF_ALIGN_IN_SECTION_HEADER */
#ifndef coff_mkobject
static boolean coff_mkobject PARAMS ((bfd *));
static boolean
coff_mkobject (abfd)
bfd * abfd;
{
coff_data_type *coff;
abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
if (abfd->tdata.coff_obj_data == 0)
return false;
coff = coff_data (abfd);
coff->symbols = (coff_symbol_type *) NULL;
coff->conversion_table = (unsigned int *) NULL;
coff->raw_syments = (struct coff_ptr_struct *) NULL;
coff->relocbase = 0;
coff->local_toc_sym_map = 0;
/* make_abs_section(abfd);*/
return true;
}
#endif
/* Create the COFF backend specific information. */
#ifndef coff_mkobject_hook
static PTR
coff_mkobject_hook (abfd, filehdr, aouthdr)
bfd * abfd;
PTR filehdr;
PTR aouthdr ATTRIBUTE_UNUSED;
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
coff_data_type *coff;
if (coff_mkobject (abfd) == false)
return NULL;
coff = coff_data (abfd);
coff->sym_filepos = internal_f->f_symptr;
/* These members communicate important constants about the symbol
table to GDB's symbol-reading code. These `constants'
unfortunately vary among coff implementations... */
coff->local_n_btmask = N_BTMASK;
coff->local_n_btshft = N_BTSHFT;
coff->local_n_tmask = N_TMASK;
coff->local_n_tshift = N_TSHIFT;
coff->local_symesz = bfd_coff_symesz (abfd);
coff->local_auxesz = bfd_coff_auxesz (abfd);
coff->local_linesz = bfd_coff_linesz (abfd);
coff->timestamp = internal_f->f_timdat;
obj_raw_syment_count (abfd) =
obj_conv_table_size (abfd) =
internal_f->f_nsyms;
#ifdef RS6000COFF_C
if ((internal_f->f_flags & F_SHROBJ) != 0)
abfd->flags |= DYNAMIC;
if (aouthdr != NULL && internal_f->f_opthdr >= bfd_coff_aoutsz (abfd))
{
struct internal_aouthdr *internal_a =
(struct internal_aouthdr *) aouthdr;
struct xcoff_tdata *xcoff;
xcoff = xcoff_data (abfd);
# ifdef U803XTOCMAGIC
xcoff->xcoff64 = internal_f->f_magic == U803XTOCMAGIC;
# else
xcoff->xcoff64 = 0;
# endif
xcoff->full_aouthdr = true;
xcoff->toc = internal_a->o_toc;
xcoff->sntoc = internal_a->o_sntoc;
xcoff->snentry = internal_a->o_snentry;
xcoff->text_align_power = internal_a->o_algntext;
xcoff->data_align_power = internal_a->o_algndata;
xcoff->modtype = internal_a->o_modtype;
xcoff->cputype = internal_a->o_cputype;
xcoff->maxdata = internal_a->o_maxdata;
xcoff->maxstack = internal_a->o_maxstack;
}
#endif
#ifdef ARM
/* Set the flags field from the COFF header read in */
if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
coff->flags = 0;
#endif
#ifdef COFF_WITH_PE
/* FIXME: I'm not sure this is ever executed, since peicode.h
defines coff_mkobject_hook. */
if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
abfd->flags |= HAS_DEBUG;
#endif
return (PTR) coff;
}
#endif
/* Determine the machine architecture and type. FIXME: This is target
dependent because the magic numbers are defined in the target
dependent header files. But there is no particular need for this.
If the magic numbers were moved to a separate file, this function
would be target independent and would also be much more successful
at linking together COFF files for different architectures. */
static boolean
coff_set_arch_mach_hook (abfd, filehdr)
bfd *abfd;
PTR filehdr;
{
long machine;
enum bfd_architecture arch;
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
machine = 0;
switch (internal_f->f_magic)
{
#ifdef PPCMAGIC
case PPCMAGIC:
arch = bfd_arch_powerpc;
machine = 0; /* what does this mean? (krk) */
break;
#endif
#ifdef I386MAGIC
case I386MAGIC:
case I386PTXMAGIC:
case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
arch = bfd_arch_i386;
machine = 0;
break;
#endif
#ifdef IA64MAGIC
case IA64MAGIC:
arch = bfd_arch_ia64;
machine = 0;
break;
#endif
#ifdef A29K_MAGIC_BIG
case A29K_MAGIC_BIG:
case A29K_MAGIC_LITTLE:
arch = bfd_arch_a29k;
machine = 0;
break;
#endif
#ifdef ARMMAGIC
case ARMMAGIC:
case ARMPEMAGIC:
case THUMBPEMAGIC:
arch = bfd_arch_arm;
switch (internal_f->f_flags & F_ARM_ARCHITECTURE_MASK)
{
case F_ARM_2: machine = bfd_mach_arm_2; break;
case F_ARM_2a: machine = bfd_mach_arm_2a; break;
case F_ARM_3: machine = bfd_mach_arm_3; break;
default:
case F_ARM_3M: machine = bfd_mach_arm_3M; break;
case F_ARM_4: machine = bfd_mach_arm_4; break;
case F_ARM_4T: machine = bfd_mach_arm_4T; break;
case F_ARM_5: machine = bfd_mach_arm_5; break;
}
break;
#endif
#ifdef MC68MAGIC
case MC68MAGIC:
case M68MAGIC:
#ifdef MC68KBCSMAGIC
case MC68KBCSMAGIC:
#endif
#ifdef APOLLOM68KMAGIC
case APOLLOM68KMAGIC:
#endif
#ifdef LYNXCOFFMAGIC
case LYNXCOFFMAGIC:
#endif
arch = bfd_arch_m68k;
machine = bfd_mach_m68020;
break;
#endif
#ifdef MC88MAGIC
case MC88MAGIC:
case MC88DMAGIC:
case MC88OMAGIC:
arch = bfd_arch_m88k;
machine = 88100;
break;
#endif
#ifdef Z8KMAGIC
case Z8KMAGIC:
arch = bfd_arch_z8k;
switch (internal_f->f_flags & F_MACHMASK)
{
case F_Z8001:
machine = bfd_mach_z8001;
break;
case F_Z8002:
machine = bfd_mach_z8002;
break;
default:
return false;
}
break;
#endif
#ifdef I860
case I860MAGIC:
arch = bfd_arch_i860;
break;
#endif
#ifdef I960
#ifdef I960ROMAGIC
case I960ROMAGIC:
case I960RWMAGIC:
arch = bfd_arch_i960;
switch (F_I960TYPE & internal_f->f_flags)
{
default:
case F_I960CORE:
machine = bfd_mach_i960_core;
break;
case F_I960KB:
machine = bfd_mach_i960_kb_sb;
break;
case F_I960MC:
machine = bfd_mach_i960_mc;
break;
case F_I960XA:
machine = bfd_mach_i960_xa;
break;
case F_I960CA:
machine = bfd_mach_i960_ca;
break;
case F_I960KA:
machine = bfd_mach_i960_ka_sa;
break;
case F_I960JX:
machine = bfd_mach_i960_jx;
break;
case F_I960HX:
machine = bfd_mach_i960_hx;
break;
}
break;
#endif
#endif
#ifdef RS6000COFF_C
#ifdef XCOFF64
case U803XTOCMAGIC:
#else
case U802ROMAGIC:
case U802WRMAGIC:
case U802TOCMAGIC:
#endif
{
int cputype;
if (xcoff_data (abfd)->cputype != -1)
cputype = xcoff_data (abfd)->cputype & 0xff;
else
{
/* We did not get a value from the a.out header. If the
file has not been stripped, we may be able to get the
architecture information from the first symbol, if it
is a .file symbol. */
if (obj_raw_syment_count (abfd) == 0)
cputype = 0;
else
{
bfd_byte *buf;
struct internal_syment sym;
buf = (bfd_byte *) bfd_malloc (bfd_coff_symesz (abfd));
if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
|| (bfd_read (buf, 1, bfd_coff_symesz (abfd), abfd)
!= bfd_coff_symesz (abfd)))
{
free (buf);
return false;
}
bfd_coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym);
if (sym.n_sclass == C_FILE)
cputype = sym.n_type & 0xff;
else
cputype = 0;
free (buf);
}
}
/* FIXME: We don't handle all cases here. */
switch (cputype)
{
default:
case 0:
#ifdef POWERMAC
/* PowerPC Macs use the same magic numbers as RS/6000
(because that's how they were bootstrapped originally),
but they are always PowerPC architecture. */
arch = bfd_arch_powerpc;
machine = bfd_mach_ppc;
#else
#ifdef XCOFF64
arch = bfd_arch_powerpc;
machine = bfd_mach_ppc_620;
#else
arch = bfd_arch_rs6000;
machine = bfd_mach_rs6k;
#endif
#endif /* POWERMAC */
break;
case 1:
arch = bfd_arch_powerpc;
machine = bfd_mach_ppc_601;
break;
case 2: /* 64 bit PowerPC */
arch = bfd_arch_powerpc;
machine = bfd_mach_ppc_620;
break;
case 3:
arch = bfd_arch_powerpc;
machine = bfd_mach_ppc;
break;
case 4:
arch = bfd_arch_rs6000;
machine = bfd_mach_rs6k;
break;
}
}
break;
#endif
#ifdef WE32KMAGIC
case WE32KMAGIC:
arch = bfd_arch_we32k;
machine = 0;
break;
#endif
#ifdef H8300MAGIC
case H8300MAGIC:
arch = bfd_arch_h8300;
machine = bfd_mach_h8300;
/* !! FIXME this probably isn't the right place for this */
abfd->flags |= BFD_IS_RELAXABLE;
break;
#endif
#ifdef H8300HMAGIC
case H8300HMAGIC:
arch = bfd_arch_h8300;
machine = bfd_mach_h8300h;
/* !! FIXME this probably isn't the right place for this */
abfd->flags |= BFD_IS_RELAXABLE;
break;
#endif
#ifdef H8300SMAGIC
case H8300SMAGIC:
arch = bfd_arch_h8300;
machine = bfd_mach_h8300s;
/* !! FIXME this probably isn't the right place for this */
abfd->flags |= BFD_IS_RELAXABLE;
break;
#endif
#ifdef SH_ARCH_MAGIC_BIG
case SH_ARCH_MAGIC_BIG:
case SH_ARCH_MAGIC_LITTLE:
#ifdef COFF_WITH_PE
case SH_ARCH_MAGIC_WINCE:
#endif
arch = bfd_arch_sh;
machine = 0;
break;
#endif
#ifdef MIPS_ARCH_MAGIC_WINCE
case MIPS_ARCH_MAGIC_WINCE:
arch = bfd_arch_mips;
machine = 0;
break;
#endif
#ifdef H8500MAGIC
case H8500MAGIC:
arch = bfd_arch_h8500;
machine = 0;
break;
#endif
#ifdef SPARCMAGIC
case SPARCMAGIC:
#ifdef LYNXCOFFMAGIC
case LYNXCOFFMAGIC:
#endif
arch = bfd_arch_sparc;
machine = 0;
break;
#endif
#ifdef TIC30MAGIC
case TIC30MAGIC:
arch = bfd_arch_tic30;
break;
#endif
#ifdef TICOFF0MAGIC
#ifdef TICOFF_TARGET_ARCH
/* this TI COFF section should be used by all new TI COFF v0 targets */
case TICOFF0MAGIC:
arch = TICOFF_TARGET_ARCH;
break;
#endif
#endif
#ifdef TICOFF1MAGIC
/* this TI COFF section should be used by all new TI COFF v1/2 targets */
/* TI COFF1 and COFF2 use the target_id field to specify which arch */
case TICOFF1MAGIC:
case TICOFF2MAGIC:
switch (internal_f->f_target_id)
{
#ifdef TI_TARGET_ID
case TI_TARGET_ID:
arch = TICOFF_TARGET_ARCH;
break;
#endif
default:
arch = bfd_arch_obscure;
(*_bfd_error_handler)
(_("Unrecognized TI COFF target id '0x%x'"),
internal_f->f_target_id);
break;
}
break;
#endif
#ifdef TIC80_ARCH_MAGIC
case TIC80_ARCH_MAGIC:
arch = bfd_arch_tic80;
break;
#endif
#ifdef MCOREMAGIC
case MCOREMAGIC:
arch = bfd_arch_mcore;
break;
#endif
default: /* Unreadable input file type */
arch = bfd_arch_obscure;
break;
}
bfd_default_set_arch_mach (abfd, arch, machine);
return true;
}
#ifdef SYMNAME_IN_DEBUG
static boolean symname_in_debug_hook
PARAMS ((bfd *, struct internal_syment *));
static boolean
symname_in_debug_hook (abfd, sym)
bfd * abfd ATTRIBUTE_UNUSED;
struct internal_syment *sym;
{
return SYMNAME_IN_DEBUG (sym) ? true : false;
}
#else
#define symname_in_debug_hook \
(boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
#endif
#ifdef RS6000COFF_C
#ifdef XCOFF64
#define FORCE_SYMNAMES_IN_STRINGS
#endif
/* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
static boolean coff_pointerize_aux_hook
PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
unsigned int, combined_entry_type *));
/*ARGSUSED*/
static boolean
coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
bfd *abfd ATTRIBUTE_UNUSED;
combined_entry_type *table_base;
combined_entry_type *symbol;
unsigned int indaux;
combined_entry_type *aux;
{
int class = symbol->u.syment.n_sclass;
if ((class == C_EXT || class == C_HIDEXT)
&& indaux + 1 == symbol->u.syment.n_numaux)
{
if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
{
aux->u.auxent.x_csect.x_scnlen.p =
table_base + aux->u.auxent.x_csect.x_scnlen.l;
aux->fix_scnlen = 1;
}
/* Return true to indicate that the caller should not do any
further work on this auxent. */
return true;
}
/* Return false to indicate that this auxent should be handled by
the caller. */
return false;
}
#else
#ifdef I960
/* We don't want to pointerize bal entries. */
static boolean coff_pointerize_aux_hook
PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
unsigned int, combined_entry_type *));
/*ARGSUSED*/
static boolean
coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
bfd *abfd ATTRIBUTE_UNUSED;
combined_entry_type *table_base ATTRIBUTE_UNUSED;
combined_entry_type *symbol;
unsigned int indaux;
combined_entry_type *aux ATTRIBUTE_UNUSED;
{
/* Return true if we don't want to pointerize this aux entry, which
is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
return (indaux == 1
&& (symbol->u.syment.n_sclass == C_LEAFPROC
|| symbol->u.syment.n_sclass == C_LEAFSTAT
|| symbol->u.syment.n_sclass == C_LEAFEXT));
}
#else /* ! I960 */
#define coff_pointerize_aux_hook 0
#endif /* ! I960 */
#endif /* ! RS6000COFF_C */
/* Print an aux entry. This returns true if it has printed it. */
static boolean coff_print_aux
PARAMS ((bfd *, FILE *, combined_entry_type *, combined_entry_type *,
combined_entry_type *, unsigned int));
static boolean
coff_print_aux (abfd, file, table_base, symbol, aux, indaux)
bfd *abfd ATTRIBUTE_UNUSED;
FILE *file ATTRIBUTE_UNUSED;
combined_entry_type *table_base ATTRIBUTE_UNUSED;
combined_entry_type *symbol ATTRIBUTE_UNUSED;
combined_entry_type *aux ATTRIBUTE_UNUSED;
unsigned int indaux ATTRIBUTE_UNUSED;
{
#ifdef RS6000COFF_C
if ((symbol->u.syment.n_sclass == C_EXT
|| symbol->u.syment.n_sclass == C_HIDEXT)
&& indaux + 1 == symbol->u.syment.n_numaux)
{
/* This is a csect entry. */
fprintf (file, "AUX ");
if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD)
{
BFD_ASSERT (! aux->fix_scnlen);
fprintf (file, "val %5ld", aux->u.auxent.x_csect.x_scnlen.l);
}
else
{
fprintf (file, "indx ");
if (! aux->fix_scnlen)
fprintf (file, "%4ld", aux->u.auxent.x_csect.x_scnlen.l);
else
fprintf (file, "%4ld",
(long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
}
fprintf (file,
" prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
aux->u.auxent.x_csect.x_parmhash,
(unsigned int) aux->u.auxent.x_csect.x_snhash,
SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp),
SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp),
(unsigned int) aux->u.auxent.x_csect.x_smclas,
aux->u.auxent.x_csect.x_stab,
(unsigned int) aux->u.auxent.x_csect.x_snstab);
return true;
}
#endif
/* Return false to indicate that no special action was taken. */
return false;
}
/*
SUBSUBSECTION
Writing relocations
To write relocations, the back end steps though the
canonical relocation table and create an
@code{internal_reloc}. The symbol index to use is removed from
the @code{offset} field in the symbol table supplied. The
address comes directly from the sum of the section base
address and the relocation offset; the type is dug directly
from the howto field. Then the @code{internal_reloc} is
swapped into the shape of an @code{external_reloc} and written
out to disk.
*/
#ifdef TARG_AUX
static int compare_arelent_ptr PARAMS ((const PTR, const PTR));
/* AUX's ld wants relocations to be sorted */
static int
compare_arelent_ptr (x, y)
const PTR x;
const PTR y;
{
const arelent **a = (const arelent **) x;
const arelent **b = (const arelent **) y;
bfd_size_type aadr = (*a)->address;
bfd_size_type badr = (*b)->address;
return (aadr < badr ? -1 : badr < aadr ? 1 : 0);
}
#endif /* TARG_AUX */
static boolean
coff_write_relocs (abfd, first_undef)
bfd * abfd;
int first_undef;
{
asection *s;
for (s = abfd->sections; s != (asection *) NULL; s = s->next)
{
unsigned int i;
struct external_reloc dst;
arelent **p;
#ifndef TARG_AUX
p = s->orelocation;
#else
/* sort relocations before we write them out */
p = (arelent **) bfd_malloc (s->reloc_count * sizeof (arelent *));
if (p == NULL && s->reloc_count > 0)
return false;
memcpy (p, s->orelocation, s->reloc_count * sizeof (arelent *));
qsort (p, s->reloc_count, sizeof (arelent *), compare_arelent_ptr);
#endif
if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
return false;
#ifdef COFF_WITH_PE
if (s->reloc_count > 0xffff)
{
/* encode real count here as first reloc */
struct internal_reloc n;
memset ((PTR) & n, 0, sizeof (n));
/* add one to count *this* reloc (grr) */
n.r_vaddr = s->reloc_count + 1;
coff_swap_reloc_out (abfd, &n, &dst);
if (bfd_write ((PTR) & dst, 1, bfd_coff_relsz (abfd), abfd)
!= bfd_coff_relsz (abfd))
return false;
}
#endif
for (i = 0; i < s->reloc_count; i++)
{
struct internal_reloc n;
arelent *q = p[i];
memset ((PTR) & n, 0, sizeof (n));
/* Now we've renumbered the symbols we know where the
undefined symbols live in the table. Check the reloc
entries for symbols who's output bfd isn't the right one.
This is because the symbol was undefined (which means
that all the pointers are never made to point to the same
place). This is a bad thing,'cause the symbols attached
to the output bfd are indexed, so that the relocation
entries know which symbol index they point to. So we
have to look up the output symbol here. */
if (q->sym_ptr_ptr[0]->the_bfd != abfd)
{
int i;
const char *sname = q->sym_ptr_ptr[0]->name;
asymbol **outsyms = abfd->outsymbols;
for (i = first_undef; outsyms[i]; i++)
{
const char *intable = outsyms[i]->name;
if (strcmp (intable, sname) == 0) {
/* got a hit, so repoint the reloc */
q->sym_ptr_ptr = outsyms + i;
break;
}
}
}
n.r_vaddr = q->address + s->vma;
#ifdef R_IHCONST
/* The 29k const/consth reloc pair is a real kludge. The consth
part doesn't have a symbol; it has an offset. So rebuilt
that here. */
if (q->howto->type == R_IHCONST)
n.r_symndx = q->addend;
else
#endif
if (q->sym_ptr_ptr)
{
#ifdef SECTION_RELATIVE_ABSOLUTE_SYMBOL_P
if (SECTION_RELATIVE_ABSOLUTE_SYMBOL_P (q,s))
#else
if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
#endif
/* This is a relocation relative to the absolute symbol. */
n.r_symndx = -1;
else
{
n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
/* Take notice if the symbol reloc points to a symbol
we don't have in our symbol table. What should we
do for this?? */
if (n.r_symndx > obj_conv_table_size (abfd))
abort ();
}
}
#ifdef SWAP_OUT_RELOC_OFFSET
n.r_offset = q->addend;
#endif
#ifdef SELECT_RELOC
/* Work out reloc type from what is required */
SELECT_RELOC (n, q->howto);
#else
n.r_type = q->howto->type;
#endif
coff_swap_reloc_out (abfd, &n, &dst);
if (bfd_write ((PTR) & dst, 1, bfd_coff_relsz (abfd), abfd)
!= bfd_coff_relsz (abfd))
return false;
}
#ifdef TARG_AUX
if (p != NULL)
free (p);
#endif
}
return true;
}
/* Set flags and magic number of a coff file from architecture and machine
type. Result is true if we can represent the arch&type, false if not. */
static boolean
coff_set_flags (abfd, magicp, flagsp)
bfd * abfd;
unsigned int *magicp ATTRIBUTE_UNUSED;
unsigned short *flagsp ATTRIBUTE_UNUSED;
{
switch (bfd_get_arch (abfd))
{
#ifdef Z8KMAGIC
case bfd_arch_z8k:
*magicp = Z8KMAGIC;
switch (bfd_get_mach (abfd))
{
case bfd_mach_z8001:
*flagsp = F_Z8001;
break;
case bfd_mach_z8002:
*flagsp = F_Z8002;
break;
default:
return false;
}
return true;
#endif
#ifdef I960ROMAGIC
case bfd_arch_i960:
{
unsigned flags;
*magicp = I960ROMAGIC;
/*
((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
I960RWMAGIC); FIXME???
*/
switch (bfd_get_mach (abfd))
{
case bfd_mach_i960_core:
flags = F_I960CORE;
break;
case bfd_mach_i960_kb_sb:
flags = F_I960KB;
break;
case bfd_mach_i960_mc:
flags = F_I960MC;
break;
case bfd_mach_i960_xa:
flags = F_I960XA;
break;
case bfd_mach_i960_ca:
flags = F_I960CA;
break;
case bfd_mach_i960_ka_sa:
flags = F_I960KA;
break;
case bfd_mach_i960_jx:
flags = F_I960JX;
break;
case bfd_mach_i960_hx:
flags = F_I960HX;
break;
default:
return false;
}
*flagsp = flags;
return true;
}
break;
#endif
#ifdef TIC30MAGIC
case bfd_arch_tic30:
*magicp = TIC30MAGIC;
return true;
#endif
#ifdef TICOFF_DEFAULT_MAGIC
case TICOFF_TARGET_ARCH:
/* if there's no indication of which version we want, use the default */
if (!abfd->xvec )
*magicp = TICOFF_DEFAULT_MAGIC;
else
{
/* we may want to output in a different COFF version */
switch (abfd->xvec->name[4])
{
case '0':
*magicp = TICOFF0MAGIC;
break;
case '1':
*magicp = TICOFF1MAGIC;
break;
case '2':
*magicp = TICOFF2MAGIC;
break;
default:
return false;
}
}
return true;
#endif
#ifdef TIC80_ARCH_MAGIC
case bfd_arch_tic80:
*magicp = TIC80_ARCH_MAGIC;
return true;
#endif
#ifdef ARMMAGIC
case bfd_arch_arm:
#ifdef ARM_WINCE
* magicp = ARMPEMAGIC;
#else
* magicp = ARMMAGIC;
#endif
* flagsp = 0;
if (APCS_SET (abfd))
{
if (APCS_26_FLAG (abfd))
* flagsp |= F_APCS26;
if (APCS_FLOAT_FLAG (abfd))
* flagsp |= F_APCS_FLOAT;
if (PIC_FLAG (abfd))
* flagsp |= F_PIC;
}
if (INTERWORK_SET (abfd) && INTERWORK_FLAG (abfd))
* flagsp |= F_INTERWORK;
switch (bfd_get_mach (abfd))
{
case bfd_mach_arm_2: * flagsp |= F_ARM_2; break;
case bfd_mach_arm_2a: * flagsp |= F_ARM_2a; break;
case bfd_mach_arm_3: * flagsp |= F_ARM_3; break;
case bfd_mach_arm_3M: * flagsp |= F_ARM_3M; break;
case bfd_mach_arm_4: * flagsp |= F_ARM_4; break;
case bfd_mach_arm_4T: * flagsp |= F_ARM_4T; break;
case bfd_mach_arm_5: * flagsp |= F_ARM_5; break;
/* FIXME: we do not have F_ARM vaues greater than F_ARM_5. */
case bfd_mach_arm_5T: * flagsp |= F_ARM_5; break;
case bfd_mach_arm_5TE: * flagsp |= F_ARM_5; break;
case bfd_mach_arm_XScale: * flagsp |= F_ARM_5; break;
}
return true;
#endif
#ifdef PPCMAGIC
case bfd_arch_powerpc:
*magicp = PPCMAGIC;
return true;
break;
#endif
#ifdef I386MAGIC
case bfd_arch_i386:
*magicp = I386MAGIC;
#ifdef LYNXOS
/* Just overwrite the usual value if we're doing Lynx. */
*magicp = LYNXCOFFMAGIC;
#endif
return true;
break;
#endif
#ifdef I860MAGIC
case bfd_arch_i860:
*magicp = I860MAGIC;
return true;
break;
#endif
#ifdef IA64MAGIC
case bfd_arch_ia64:
*magicp = IA64MAGIC;
return true;
break;
#endif
#ifdef MC68MAGIC
case bfd_arch_m68k:
#ifdef APOLLOM68KMAGIC
*magicp = APOLLO_COFF_VERSION_NUMBER;
#else
/* NAMES_HAVE_UNDERSCORE may be defined by coff-u68k.c. */
#ifdef NAMES_HAVE_UNDERSCORE
*magicp = MC68KBCSMAGIC;
#else
*magicp = MC68MAGIC;
#endif
#endif
#ifdef LYNXOS
/* Just overwrite the usual value if we're doing Lynx. */
*magicp = LYNXCOFFMAGIC;
#endif
return true;
break;
#endif
#ifdef MC88MAGIC
case bfd_arch_m88k:
*magicp = MC88OMAGIC;
return true;
break;
#endif
#ifdef H8300MAGIC
case bfd_arch_h8300:
switch (bfd_get_mach (abfd))
{
case bfd_mach_h8300:
*magicp = H8300MAGIC;
return true;
case bfd_mach_h8300h:
*magicp = H8300HMAGIC;
return true;
case bfd_mach_h8300s:
*magicp = H8300SMAGIC;
return true;
}
break;
#endif
#ifdef SH_ARCH_MAGIC_BIG
case bfd_arch_sh:
#ifdef COFF_IMAGE_WITH_PE
*magicp = SH_ARCH_MAGIC_WINCE;
#else
if (bfd_big_endian (abfd))
*magicp = SH_ARCH_MAGIC_BIG;
else
*magicp = SH_ARCH_MAGIC_LITTLE;
#endif
return true;
break;
#endif
#ifdef MIPS_ARCH_MAGIC_WINCE
case bfd_arch_mips:
*magicp = MIPS_ARCH_MAGIC_WINCE;
return true;
break;
#endif
#ifdef SPARCMAGIC
case bfd_arch_sparc:
*magicp = SPARCMAGIC;
#ifdef LYNXOS
/* Just overwrite the usual value if we're doing Lynx. */
*magicp = LYNXCOFFMAGIC;
#endif
return true;
break;
#endif
#ifdef H8500MAGIC
case bfd_arch_h8500:
*magicp = H8500MAGIC;
return true;
break;
#endif
#ifdef A29K_MAGIC_BIG
case bfd_arch_a29k:
if (bfd_big_endian (abfd))
*magicp = A29K_MAGIC_BIG;
else
*magicp = A29K_MAGIC_LITTLE;
return true;
break;
#endif
#ifdef WE32KMAGIC
case bfd_arch_we32k:
*magicp = WE32KMAGIC;
return true;
break;
#endif
#ifdef RS6000COFF_C
case bfd_arch_rs6000:
#ifndef PPCMAGIC
case bfd_arch_powerpc:
#endif
#ifdef XCOFF64
if (bfd_get_mach (abfd) == bfd_mach_ppc_620
&& !strncmp (abfd->xvec->name,"aix", 3))
*magicp = U803XTOCMAGIC;
else
#else
*magicp = U802TOCMAGIC;
#endif
return true;
break;
#endif
#ifdef MCOREMAGIC
case bfd_arch_mcore:
* magicp = MCOREMAGIC;
return true;
#endif
#ifdef W65MAGIC
case bfd_arch_w65:
*magicp = W65MAGIC;
return true;
#endif
default: /* Unknown architecture. */
/* Fall through to "return false" below, to avoid
"statement never reached" errors on the one below. */
break;
}
return false;
}
static boolean
coff_set_arch_mach (abfd, arch, machine)
bfd * abfd;
enum bfd_architecture arch;
unsigned long machine;
{
unsigned dummy1;
unsigned short dummy2;
if (! bfd_default_set_arch_mach (abfd, arch, machine))
return false;
if (arch != bfd_arch_unknown &&
coff_set_flags (abfd, &dummy1, &dummy2) != true)
return false; /* We can't represent this type */
return true; /* We're easy ... */
}
#ifdef COFF_IMAGE_WITH_PE
/* This is used to sort sections by VMA, as required by PE image
files. */
static int sort_by_secaddr PARAMS ((const PTR, const PTR));
static int
sort_by_secaddr (arg1, arg2)
const PTR arg1;
const PTR arg2;
{
const asection *a = *(const asection **) arg1;
const asection *b = *(const asection **) arg2;
if (a->vma < b->vma)
return -1;
else if (a->vma > b->vma)
return 1;
else
return 0;
}
#endif /* COFF_IMAGE_WITH_PE */
/* Calculate the file position for each section. */
#ifndef I960
#define ALIGN_SECTIONS_IN_FILE
#endif
#if defined(TIC80COFF) || defined(TICOFF)
#undef ALIGN_SECTIONS_IN_FILE
#endif
static boolean
coff_compute_section_file_positions (abfd)
bfd * abfd;
{
asection *current;
asection *previous = (asection *) NULL;
file_ptr sofar = bfd_coff_filhsz (abfd);
boolean align_adjust;
#ifdef ALIGN_SECTIONS_IN_FILE
file_ptr old_sofar;
#endif
#ifdef RS6000COFF_C
/* On XCOFF, if we have symbols, set up the .debug section. */
if (bfd_get_symcount (abfd) > 0)
{
bfd_size_type sz;
bfd_size_type i, symcount;
asymbol **symp;
sz = 0;
symcount = bfd_get_symcount (abfd);
for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++)
{
coff_symbol_type *cf;
cf = coff_symbol_from (abfd, *symp);
if (cf != NULL
&& cf->native != NULL
&& SYMNAME_IN_DEBUG (&cf->native->u.syment))
{
size_t len;
len = strlen (bfd_asymbol_name (*symp));
if (len > SYMNMLEN || bfd_coff_force_symnames_in_strings (abfd))
sz += len + 1 + bfd_coff_debug_string_prefix_length (abfd);
}
}
if (sz > 0)
{
asection *dsec;
dsec = bfd_make_section_old_way (abfd, ".debug");
if (dsec == NULL)
abort ();
dsec->_raw_size = sz;
dsec->flags |= SEC_HAS_CONTENTS;
}
}
#endif
#ifdef COFF_IMAGE_WITH_PE
int page_size;
if (coff_data (abfd)->link_info)
{
page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
}
else
page_size = PE_DEF_FILE_ALIGNMENT;
#else
#ifdef COFF_PAGE_SIZE
int page_size = COFF_PAGE_SIZE;
#endif
#endif
if (bfd_get_start_address (abfd))
{
/* A start address may have been added to the original file. In this
case it will need an optional header to record it. */
abfd->flags |= EXEC_P;
}
if (abfd->flags & EXEC_P)
sofar += bfd_coff_aoutsz (abfd);
#ifdef RS6000COFF_C
else if (xcoff_data (abfd)->full_aouthdr)
sofar += bfd_coff_aoutsz (abfd);
else
sofar += SMALL_AOUTSZ;
#endif
sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
#ifdef RS6000COFF_C
/* XCOFF handles overflows in the reloc and line number count fields
by allocating a new section header to hold the correct counts. */
for (current = abfd->sections; current != NULL; current = current->next)
if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
sofar += bfd_coff_scnhsz (abfd);
#endif
#ifdef COFF_IMAGE_WITH_PE
{
/* PE requires the sections to be in memory order when listed in
the section headers. It also does not like empty loadable
sections. The sections apparently do not have to be in the
right order in the image file itself, but we do need to get the
target_index values right. */
int count;
asection **section_list;
int i;
int target_index;
count = 0;
for (current = abfd->sections; current != NULL; current = current->next)
++count;
/* We allocate an extra cell to simplify the final loop. */
section_list = bfd_malloc (sizeof (struct asection *) * (count + 1));
if (section_list == NULL)
return false;
i = 0;
for (current = abfd->sections; current != NULL; current = current->next)
{
section_list[i] = current;
++i;
}
section_list[i] = NULL;
qsort (section_list, count, sizeof (asection *), sort_by_secaddr);
/* Rethread the linked list into sorted order; at the same time,
assign target_index values. */
target_index = 1;
abfd->sections = section_list[0];
for (i = 0; i < count; i++)
{
current = section_list[i];
current->next = section_list[i + 1];
/* Later, if the section has zero size, we'll be throwing it
away, so we don't want to number it now. Note that having
a zero size and having real contents are different
concepts: .bss has no contents, but (usually) non-zero
size. */
if (current->_raw_size == 0)
{
/* Discard. However, it still might have (valid) symbols
in it, so arbitrarily set it to section 1 (indexing is
1-based here; usually .text). __end__ and other
contents of .endsection really have this happen.
FIXME: This seems somewhat dubious. */
current->target_index = 1;
}
else
current->target_index = target_index++;
}
free (section_list);
}
#else /* ! COFF_IMAGE_WITH_PE */
{
/* Set the target_index field. */
int target_index;
target_index = 1;
for (current = abfd->sections; current != NULL; current = current->next)
current->target_index = target_index++;
}
#endif /* ! COFF_IMAGE_WITH_PE */
align_adjust = false;
for (current = abfd->sections;
current != (asection *) NULL;
current = current->next)
{
#ifdef COFF_IMAGE_WITH_PE
/* With PE we have to pad each section to be a multiple of its
page size too, and remember both sizes. */
if (coff_section_data (abfd, current) == NULL)
{
current->used_by_bfd =
(PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
if (current->used_by_bfd == NULL)
return false;
}
if (pei_section_data (abfd, current) == NULL)
{
coff_section_data (abfd, current)->tdata =
(PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
if (coff_section_data (abfd, current)->tdata == NULL)
return false;
}
if (pei_section_data (abfd, current)->virt_size == 0)
pei_section_data (abfd, current)->virt_size = current->_raw_size;
#endif
/* Only deal with sections which have contents. */
if (!(current->flags & SEC_HAS_CONTENTS))
continue;
#ifdef COFF_IMAGE_WITH_PE
/* Make sure we skip empty sections in a PE image. */
if (current->_raw_size == 0)
continue;
#endif
/* 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... */
#ifdef ALIGN_SECTIONS_IN_FILE
if ((abfd->flags & EXEC_P) != 0)
{
/* make sure this section is aligned on the right boundary - by
padding the previous section up if necessary */
old_sofar = sofar;
sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
if (previous != (asection *) NULL)
{
previous->_raw_size += sofar - old_sofar;
}
}
#endif
/* In demand paged files the low order bits of the file offset
must match the low order bits of the virtual address. */
#ifdef COFF_PAGE_SIZE
if ((abfd->flags & D_PAGED) != 0
&& (current->flags & SEC_ALLOC) != 0)
sofar += (current->vma - sofar) % page_size;
#endif
current->filepos = sofar;
#ifdef COFF_IMAGE_WITH_PE
/* Set the padded size. */
current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
#endif
sofar += current->_raw_size;
#ifdef ALIGN_SECTIONS_IN_FILE
/* make sure that this section is of the right size too */
if ((abfd->flags & EXEC_P) == 0)
{
bfd_size_type old_size;
old_size = current->_raw_size;
current->_raw_size = BFD_ALIGN (current->_raw_size,
1 << current->alignment_power);
align_adjust = current->_raw_size != old_size;
sofar += current->_raw_size - old_size;
}
else
{
old_sofar = sofar;
sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
align_adjust = sofar != old_sofar;
current->_raw_size += sofar - old_sofar;
}
#endif
#ifdef COFF_IMAGE_WITH_PE
/* For PE we need to make sure we pad out to the aligned
_raw_size, in case the caller only writes out data to the
unaligned _raw_size. */
if (pei_section_data (abfd, current)->virt_size < current->_raw_size)
align_adjust = true;
#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;
}
/* It is now safe to write to the output file. If we needed an
alignment adjustment for the last section, then make sure that
there is a byte at offset sofar. If there are no symbols and no
relocs, then nothing follows the last section. If we don't force
the last byte out, then the file may appear to be truncated. */
if (align_adjust)
{
bfd_byte b;
b = 0;
if (bfd_seek (abfd, sofar - 1, SEEK_SET) != 0
|| bfd_write (&b, 1, 1, abfd) != 1)
return false;
}
/* Make sure the relocations are aligned. We don't need to make
sure that this byte exists, because it will only matter if there
really are relocs. */
sofar = BFD_ALIGN (sofar, 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER);
obj_relocbase (abfd) = sofar;
abfd->output_has_begun = true;
return true;
}
#if 0
/* This can never work, because it is called too late--after the
section positions have been set. I can't figure out what it is
for, so I am going to disable it--Ian Taylor 20 March 1996. */
/* If .file, .text, .data, .bss symbols are missing, add them. */
/* @@ Should we only be adding missing symbols, or overriding the aux
values for existing section symbols? */
static boolean
coff_add_missing_symbols (abfd)
bfd *abfd;
{
unsigned int nsyms = bfd_get_symcount (abfd);
asymbol **sympp = abfd->outsymbols;
asymbol **sympp2;
unsigned int i;
int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
for (i = 0; i < nsyms; i++)
{
coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
CONST char *name;
if (csym)
{
/* only do this if there is a coff representation of the input
symbol */
if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
{
need_file = 0;
continue;
}
name = csym->symbol.name;
if (!name)
continue;
if (!strcmp (name, _TEXT))
need_text = 0;
#ifdef APOLLO_M68
else if (!strcmp (name, ".wtext"))
need_text = 0;
#endif
else if (!strcmp (name, _DATA))
need_data = 0;
else if (!strcmp (name, _BSS))
need_bss = 0;
}
}
/* Now i == bfd_get_symcount (abfd). */
/* @@ For now, don't deal with .file symbol. */
need_file = 0;
if (!need_text && !need_data && !need_bss && !need_file)
return true;
nsyms += need_text + need_data + need_bss + need_file;
sympp2 = (asymbol **) bfd_alloc (abfd, nsyms * sizeof (asymbol *));
if (!sympp2)
return false;
memcpy (sympp2, sympp, i * sizeof (asymbol *));
if (need_file)
{
/* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
abort ();
}
if (need_text)
sympp2[i++] = coff_section_symbol (abfd, _TEXT);
if (need_data)
sympp2[i++] = coff_section_symbol (abfd, _DATA);
if (need_bss)
sympp2[i++] = coff_section_symbol (abfd, _BSS);
BFD_ASSERT (i == nsyms);
bfd_set_symtab (abfd, sympp2, nsyms);
return true;
}
#endif /* 0 */
/* SUPPRESS 558 */
/* SUPPRESS 529 */
static boolean
coff_write_object_contents (abfd)
bfd * abfd;
{
asection *current;
boolean hasrelocs = false;
boolean haslinno = false;
boolean hasdebug = false;
file_ptr scn_base;
file_ptr reloc_base;
file_ptr lineno_base;
file_ptr sym_base;
unsigned long reloc_size = 0, reloc_count = 0;
unsigned long lnno_size = 0;
boolean long_section_names;
asection *text_sec = NULL;
asection *data_sec = NULL;
asection *bss_sec = NULL;
struct internal_filehdr internal_f;
struct internal_aouthdr internal_a;
#ifdef COFF_LONG_SECTION_NAMES
size_t string_size = STRING_SIZE_SIZE;
#endif
bfd_set_error (bfd_error_system_call);
/* Make a pass through the symbol table to count line number entries and
put them into the correct asections */
lnno_size = coff_count_linenumbers (abfd) * bfd_coff_linesz (abfd);
if (abfd->output_has_begun == false)
{
if (! coff_compute_section_file_positions (abfd))
return false;
}
reloc_base = obj_relocbase (abfd);
/* Work out the size of the reloc and linno areas */
for (current = abfd->sections; current != NULL; current =
current->next)
{
#ifdef COFF_WITH_PE
/* we store the actual reloc count in the first reloc's addr */
if (current->reloc_count > 0xffff)
reloc_count ++;
#endif
reloc_count += current->reloc_count;
}
reloc_size = reloc_count * bfd_coff_relsz (abfd);
lineno_base = reloc_base + reloc_size;
sym_base = lineno_base + lnno_size;
/* Indicate in each section->line_filepos its actual file address */
for (current = abfd->sections; current != NULL; current =
current->next)
{
if (current->lineno_count)
{
current->line_filepos = lineno_base;
current->moving_line_filepos = lineno_base;
lineno_base += current->lineno_count * bfd_coff_linesz (abfd);
}
else
{
current->line_filepos = 0;
}
if (current->reloc_count)
{
current->rel_filepos = reloc_base;
reloc_base += current->reloc_count * bfd_coff_relsz (abfd);
#ifdef COFF_WITH_PE
/* extra reloc to hold real count */
if (current->reloc_count > 0xffff)
reloc_base += bfd_coff_relsz (abfd);
#endif
}
else
{
current->rel_filepos = 0;
}
}
/* Write section headers to the file. */
internal_f.f_nscns = 0;
if ((abfd->flags & EXEC_P) != 0)
scn_base = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
else
{
scn_base = bfd_coff_filhsz (abfd);
#ifdef RS6000COFF_C
if (xcoff_data (abfd)->full_aouthdr)
scn_base += bfd_coff_aoutsz (abfd);
else
scn_base += SMALL_AOUTSZ;
#endif
}
if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
return false;
long_section_names = false;
for (current = abfd->sections;
current != NULL;
current = current->next)
{
struct internal_scnhdr section;
boolean is_reloc_section = false;
#ifdef COFF_IMAGE_WITH_PE
if (strcmp (current->name, ".reloc") == 0)
{
is_reloc_section = true;
hasrelocs = true;
pe_data (abfd)->has_reloc_section = 1;
}
#endif
internal_f.f_nscns++;
strncpy (section.s_name, current->name, SCNNMLEN);
#ifdef COFF_LONG_SECTION_NAMES
/* Handle long section names as in PE. This must be compatible
with the code in coff_write_symbols and _bfd_coff_final_link. */
{
size_t len;
len = strlen (current->name);
if (len > SCNNMLEN)
{
memset (section.s_name, 0, SCNNMLEN);
sprintf (section.s_name, "/%lu", (unsigned long) string_size);
string_size += len + 1;
long_section_names = true;
}
}
#endif
#ifdef _LIB
/* Always set s_vaddr of .lib to 0. This is right for SVR3.2
Ian Taylor <ian@cygnus.com>. */
if (strcmp (current->name, _LIB) == 0)
section.s_vaddr = 0;
else
#endif
section.s_vaddr = current->vma;
section.s_paddr = current->lma;
section.s_size = current->_raw_size;
#ifdef coff_get_section_load_page
section.s_page = coff_get_section_load_page (current);
#endif
#ifdef COFF_WITH_PE
section.s_paddr = 0;
#endif
#ifdef COFF_IMAGE_WITH_PE
/* Reminder: s_paddr holds the virtual size of the section. */
if (coff_section_data (abfd, current) != NULL
&& pei_section_data (abfd, current) != NULL)
section.s_paddr = pei_section_data (abfd, current)->virt_size;
else
section.s_paddr = 0;
#endif
/*
If this section has no size or is unloadable then the scnptr
will be 0 too
*/
if (current->_raw_size == 0 ||
(current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
{
section.s_scnptr = 0;
}
else
{
section.s_scnptr = current->filepos;
}
section.s_relptr = current->rel_filepos;
section.s_lnnoptr = current->line_filepos;
section.s_nreloc = current->reloc_count;
section.s_nlnno = current->lineno_count;
#ifndef COFF_IMAGE_WITH_PE
/* In PEI, relocs come in the .reloc section. */
if (current->reloc_count != 0)
hasrelocs = true;
#endif
if (current->lineno_count != 0)
haslinno = true;
if ((current->flags & SEC_DEBUGGING) != 0
&& ! is_reloc_section)
hasdebug = true;
#ifdef RS6000COFF_C
#ifndef XCOFF64
/* Indicate the use of an XCOFF overflow section header. */
if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
{
section.s_nreloc = 0xffff;
section.s_nlnno = 0xffff;
}
#endif
#endif
section.s_flags = sec_to_styp_flags (current->name, current->flags);
if (!strcmp (current->name, _TEXT))
{
text_sec = current;
}
else if (!strcmp (current->name, _DATA))
{
data_sec = current;
}
else if (!strcmp (current->name, _BSS))
{
bss_sec = current;
}
#ifdef I960
section.s_align = (current->alignment_power
? 1 << current->alignment_power
: 0);
#endif
#ifdef TIC80COFF
/* TI COFF puts the alignment power in bits 8-11 of the flags */
section.s_flags |= (current->alignment_power & 0xF) << 8;
#endif
#ifdef COFF_ENCODE_ALIGNMENT
COFF_ENCODE_ALIGNMENT(section, current->alignment_power);
#endif
#ifdef COFF_IMAGE_WITH_PE
/* Suppress output of the sections if they are null. ld
includes the bss and data sections even if there is no size
assigned to them. NT loader doesn't like it if these section
headers are included if the sections themselves are not
needed. See also coff_compute_section_file_positions. */
if (section.s_size == 0)
internal_f.f_nscns--;
else
#endif
{
SCNHDR buff;
if (coff_swap_scnhdr_out (abfd, &section, &buff) == 0
|| bfd_write ((PTR) (&buff), 1, bfd_coff_scnhsz (abfd), abfd)
!= bfd_coff_scnhsz (abfd))
return false;
}
#ifdef COFF_WITH_PE
/* PE stores COMDAT section information in the symbol table. If
this section is supposed to have some COMDAT info, track down
the symbol in the symbol table and modify it. */
if ((current->flags & SEC_LINK_ONCE) != 0)
{
unsigned int i, count;
asymbol **psym;
coff_symbol_type *csym = NULL;
asymbol **psymsec;
psymsec = NULL;
count = bfd_get_symcount (abfd);
for (i = 0, psym = abfd->outsymbols; i < count; i++, psym++)
{
if ((*psym)->section != current)
continue;
/* Remember the location of the first symbol in this
section. */
if (psymsec == NULL)
psymsec = psym;
/* See if this is the section symbol. */
if (strcmp ((*psym)->name, current->name) == 0)
{
csym = coff_symbol_from (abfd, *psym);
if (csym == NULL
|| csym->native == NULL
|| csym->native->u.syment.n_numaux < 1
|| csym->native->u.syment.n_sclass != C_STAT
|| csym->native->u.syment.n_type != T_NULL)
continue;
/* Here *PSYM is the section symbol for CURRENT. */
break;
}
}
/* Did we find it?
Note that we might not if we're converting the file from
some other object file format. */
if (i < count)
{
combined_entry_type *aux;
/* We don't touch the x_checksum field. The
x_associated field is not currently supported. */
aux = csym->native + 1;
switch (current->flags & SEC_LINK_DUPLICATES)
{
case SEC_LINK_DUPLICATES_DISCARD:
aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_ANY;
break;
case SEC_LINK_DUPLICATES_ONE_ONLY:
aux->u.auxent.x_scn.x_comdat =
IMAGE_COMDAT_SELECT_NODUPLICATES;
break;
case SEC_LINK_DUPLICATES_SAME_SIZE:
aux->u.auxent.x_scn.x_comdat =
IMAGE_COMDAT_SELECT_SAME_SIZE;
break;
case SEC_LINK_DUPLICATES_SAME_CONTENTS:
aux->u.auxent.x_scn.x_comdat =
IMAGE_COMDAT_SELECT_EXACT_MATCH;
break;
}
/* The COMDAT symbol must be the first symbol from this
section in the symbol table. In order to make this
work, we move the COMDAT symbol before the first
symbol we found in the search above. It's OK to
rearrange the symbol table at this point, because
coff_renumber_symbols is going to rearrange it
further and fix up all the aux entries. */
if (psym != psymsec)
{
asymbol *hold;
asymbol **pcopy;
hold = *psym;
for (pcopy = psym; pcopy > psymsec; pcopy--)
pcopy[0] = pcopy[-1];
*psymsec = hold;
}
}
}
#endif /* COFF_WITH_PE */
}
#ifdef RS6000COFF_C
/* XCOFF handles overflows in the reloc and line number count fields
by creating a new section header to hold the correct values. */
for (current = abfd->sections; current != NULL; current = current->next)
{
if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
{
struct internal_scnhdr scnhdr;
SCNHDR buff;
internal_f.f_nscns++;
strncpy (&(scnhdr.s_name[0]), current->name, 8);
scnhdr.s_paddr = current->reloc_count;
scnhdr.s_vaddr = current->lineno_count;
scnhdr.s_size = 0;
scnhdr.s_scnptr = 0;
scnhdr.s_relptr = current->rel_filepos;
scnhdr.s_lnnoptr = current->line_filepos;
scnhdr.s_nreloc = current->target_index;
scnhdr.s_nlnno = current->target_index;
scnhdr.s_flags = STYP_OVRFLO;
if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0
|| bfd_write ((PTR) &buff, 1, bfd_coff_scnhsz (abfd), abfd)
!= bfd_coff_scnhsz (abfd))
return false;
}
}
#endif
/* OK, now set up the filehdr... */
/* Don't include the internal abs section in the section count */
/*
We will NOT put a fucking timestamp in the header here. Every time you
put it back, I will come in and take it out again. I'm sorry. This
field does not belong here. We fill it with a 0 so it compares the
same but is not a reasonable time. -- gnu@cygnus.com
*/
internal_f.f_timdat = 0;
internal_f.f_flags = 0;
if (abfd->flags & EXEC_P)
internal_f.f_opthdr = bfd_coff_aoutsz (abfd);
else
{
internal_f.f_opthdr = 0;
#ifdef RS6000COFF_C
if (xcoff_data (abfd)->full_aouthdr)
internal_f.f_opthdr = bfd_coff_aoutsz (abfd);
else
internal_f.f_opthdr = SMALL_AOUTSZ;
#endif
}
if (!hasrelocs)
internal_f.f_flags |= F_RELFLG;
if (!haslinno)
internal_f.f_flags |= F_LNNO;
if (abfd->flags & EXEC_P)
internal_f.f_flags |= F_EXEC;
#ifdef COFF_IMAGE_WITH_PE
if (! hasdebug)
internal_f.f_flags |= IMAGE_FILE_DEBUG_STRIPPED;
#endif
#ifndef COFF_WITH_PE
if (bfd_little_endian (abfd))
internal_f.f_flags |= F_AR32WR;
else
internal_f.f_flags |= F_AR32W;
#endif
#ifdef TI_TARGET_ID
/* target id is used in TI COFF v1 and later; COFF0 won't use this field,
but it doesn't hurt to set it internally */
internal_f.f_target_id = TI_TARGET_ID;
#endif
#ifdef TIC80_TARGET_ID
internal_f.f_target_id = TIC80_TARGET_ID;
#endif
/*
FIXME, should do something about the other byte orders and
architectures.
*/
#ifdef RS6000COFF_C
if ((abfd->flags & DYNAMIC) != 0)
internal_f.f_flags |= F_SHROBJ;
if (bfd_get_section_by_name (abfd, _LOADER) != NULL)
internal_f.f_flags |= F_DYNLOAD;
#endif
memset (&internal_a, 0, sizeof internal_a);
/* Set up architecture-dependent stuff */
{
unsigned int magic = 0;
unsigned short flags = 0;
coff_set_flags (abfd, &magic, &flags);
internal_f.f_magic = magic;
internal_f.f_flags |= flags;
/* ...and the "opt"hdr... */
#ifdef A29K
#ifdef ULTRA3 /* NYU's machine */
/* FIXME: This is a bogus check. I really want to see if there
* is a .shbss or a .shdata section, if so then set the magic
* number to indicate a shared data executable.
*/
if (internal_f.f_nscns >= 7)
internal_a.magic = SHMAGIC; /* Shared magic */
else
#endif /* ULTRA3 */
internal_a.magic = NMAGIC; /* Assume separate i/d */
#define __A_MAGIC_SET__
#endif /* A29K */
#ifdef TICOFF_AOUT_MAGIC
internal_a.magic = TICOFF_AOUT_MAGIC;
#define __A_MAGIC_SET__
#endif
#ifdef TIC80COFF
internal_a.magic = TIC80_ARCH_MAGIC;
#define __A_MAGIC_SET__
#endif /* TIC80 */
#ifdef I860
/* FIXME: What are the a.out magic numbers for the i860? */
internal_a.magic = 0;
#define __A_MAGIC_SET__
#endif /* I860 */
#ifdef I960
internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
#define __A_MAGIC_SET__
#endif /* I960 */
#if M88
#define __A_MAGIC_SET__
internal_a.magic = PAGEMAGICBCS;
#endif /* M88 */
#if APOLLO_M68
#define __A_MAGIC_SET__
internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
#endif
#if defined(M68) || defined(WE32K) || defined(M68K)
#define __A_MAGIC_SET__
#if defined(LYNXOS)
internal_a.magic = LYNXCOFFMAGIC;
#else
#if defined(TARG_AUX)
internal_a.magic = (abfd->flags & D_PAGED ? PAGEMAGICPEXECPAGED :
abfd->flags & WP_TEXT ? PAGEMAGICPEXECSWAPPED :
PAGEMAGICEXECSWAPPED);
#else
#if defined (PAGEMAGICPEXECPAGED)
internal_a.magic = PAGEMAGICPEXECPAGED;
#endif
#endif /* TARG_AUX */
#endif /* LYNXOS */
#endif /* M68 || WE32K || M68K */
#if defined(ARM)
#define __A_MAGIC_SET__
internal_a.magic = ZMAGIC;
#endif
#if defined(PPC_PE)
#define __A_MAGIC_SET__
internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
#endif
#if defined MCORE_PE
#define __A_MAGIC_SET__
internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
#endif
#if defined(I386)
#define __A_MAGIC_SET__
#if defined(LYNXOS)
internal_a.magic = LYNXCOFFMAGIC;
#else /* LYNXOS */
internal_a.magic = ZMAGIC;
#endif /* LYNXOS */
#endif /* I386 */
#if defined(IA64)
#define __A_MAGIC_SET__
internal_a.magic = ZMAGIC;
#endif /* IA64 */
#if defined(SPARC)
#define __A_MAGIC_SET__
#if defined(LYNXOS)
internal_a.magic = LYNXCOFFMAGIC;
#endif /* LYNXOS */
#endif /* SPARC */
#ifdef 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
#if defined(SH) && defined(COFF_WITH_PE)
#define __A_MAGIC_SET__
internal_a.magic = SH_PE_MAGIC;
#endif
#if defined(MIPS) && defined(COFF_WITH_PE)
#define __A_MAGIC_SET__
internal_a.magic = MIPS_PE_MAGIC;
#endif
#ifndef __A_MAGIC_SET__
#include "Your aouthdr magic number is not being set!"
#else
#undef __A_MAGIC_SET__
#endif
}
/* FIXME: Does anybody ever set this to another value? */
internal_a.vstamp = 0;
/* Now should write relocs, strings, syms */
obj_sym_filepos (abfd) = sym_base;
if (bfd_get_symcount (abfd) != 0)
{
int firstundef;
#if 0
if (!coff_add_missing_symbols (abfd))
return false;
#endif
if (!coff_renumber_symbols (abfd, &firstundef))
return false;
coff_mangle_symbols (abfd);
if (! coff_write_symbols (abfd))
return false;
if (! coff_write_linenumbers (abfd))
return false;
if (! coff_write_relocs (abfd, firstundef))
return false;
}
#ifdef COFF_LONG_SECTION_NAMES
else if (long_section_names && ! obj_coff_strings_written (abfd))
{
/* If we have long section names we have to write out the string
table even if there are no symbols. */
if (! coff_write_symbols (abfd))
return false;
}
#endif
#ifdef COFF_IMAGE_WITH_PE
#ifdef PPC_PE
else if ((abfd->flags & EXEC_P) != 0)
{
bfd_byte b;
/* PowerPC PE appears to require that all executable files be
rounded up to the page size. */
b = 0;
if (bfd_seek (abfd,
BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1,
SEEK_SET) != 0
|| bfd_write (&b, 1, 1, abfd) != 1)
return false;
}
#endif
#endif
/* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
backend linker, and obj_raw_syment_count is not valid until after
coff_write_symbols is called. */
if (obj_raw_syment_count (abfd) != 0)
{
internal_f.f_symptr = sym_base;
#ifdef RS6000COFF_C
/* AIX appears to require that F_RELFLG not be set if there are
local symbols but no relocations. */
internal_f.f_flags &=~ F_RELFLG;
#endif
}
else
{
if (long_section_names)
internal_f.f_symptr = sym_base;
else
internal_f.f_symptr = 0;
internal_f.f_flags |= F_LSYMS;
}
if (text_sec)
{
internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
}
if (data_sec)
{
internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
}
if (bss_sec)
{
internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
if (internal_a.bsize && bss_sec->vma < internal_a.data_start)
internal_a.data_start = bss_sec->vma;
}
internal_a.entry = bfd_get_start_address (abfd);
internal_f.f_nsyms = obj_raw_syment_count (abfd);
#ifdef RS6000COFF_C
if (xcoff_data (abfd)->full_aouthdr)
{
bfd_vma toc;
asection *loader_sec;
internal_a.vstamp = 1;
internal_a.o_snentry = xcoff_data (abfd)->snentry;
if (internal_a.o_snentry == 0)
internal_a.entry = (bfd_vma) -1;
if (text_sec != NULL)
{
internal_a.o_sntext = text_sec->target_index;
internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec);
}
else
{
internal_a.o_sntext = 0;
internal_a.o_algntext = 0;
}
if (data_sec != NULL)
{
internal_a.o_sndata = data_sec->target_index;
internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec);
}
else
{
internal_a.o_sndata = 0;
internal_a.o_algndata = 0;
}
loader_sec = bfd_get_section_by_name (abfd, ".loader");
if (loader_sec != NULL)
internal_a.o_snloader = loader_sec->target_index;
else
internal_a.o_snloader = 0;
if (bss_sec != NULL)
internal_a.o_snbss = bss_sec->target_index;
else
internal_a.o_snbss = 0;
toc = xcoff_data (abfd)->toc;
internal_a.o_toc = toc;
internal_a.o_sntoc = xcoff_data (abfd)->sntoc;
internal_a.o_modtype = xcoff_data (abfd)->modtype;
if (xcoff_data (abfd)->cputype != -1)
internal_a.o_cputype = xcoff_data (abfd)->cputype;
else
{
switch (bfd_get_arch (abfd))
{
case bfd_arch_rs6000:
internal_a.o_cputype = 4;
break;
case bfd_arch_powerpc:
if (bfd_get_mach (abfd) == 0)
internal_a.o_cputype = 3;
else
internal_a.o_cputype = 1;
break;
default:
abort ();
}
}
internal_a.o_maxstack = xcoff_data (abfd)->maxstack;
internal_a.o_maxdata = xcoff_data (abfd)->maxdata;
}
#endif
/* now write them */
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
return false;
{
char * buff;
bfd_size_type amount;
buff = bfd_malloc (bfd_coff_filhsz (abfd));
if (buff == NULL)
return false;
bfd_coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) buff);
amount = bfd_write ((PTR) buff, 1, bfd_coff_filhsz (abfd), abfd);
free (buff);
if (amount != bfd_coff_filhsz (abfd))
return false;
}
if (abfd->flags & EXEC_P)
{
/* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
include/coff/pe.h sets AOUTSZ == sizeof (PEAOUTHDR)) */
char * buff;
bfd_size_type amount;
buff = bfd_malloc (bfd_coff_aoutsz (abfd));
if (buff == NULL)
return false;
coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) buff);
amount = bfd_write ((PTR) buff, 1, bfd_coff_aoutsz (abfd), abfd);
free (buff);
if (amount != bfd_coff_aoutsz (abfd))
return false;
}
#ifdef RS6000COFF_C
else
{
AOUTHDR buff;
size_t size;
/* XCOFF seems to always write at least a small a.out header. */
coff_swap_aouthdr_out (abfd, (PTR) &internal_a, (PTR) &buff);
if (xcoff_data (abfd)->full_aouthdr)
size = bfd_coff_aoutsz (abfd);
else
size = SMALL_AOUTSZ;
if (bfd_write ((PTR) &buff, 1, size, abfd) != size)
return false;
}
#endif
return true;
}
static boolean
coff_set_section_contents (abfd, section, location, offset, count)
bfd * abfd;
sec_ptr section;
PTR location;
file_ptr offset;
bfd_size_type count;
{
if (abfd->output_has_begun == false) /* set by bfd.c handler */
{
if (! coff_compute_section_file_positions (abfd))
return false;
}
#if defined(_LIB) && !defined(TARG_AUX)
/* The physical address field of a .lib section is used to hold the
number of shared libraries in the section. This code counts the
number of sections being written, and increments the lma field
with the number.
I have found no documentation on the contents of this section.
Experimentation indicates that the section contains zero or more
records, each of which has the following structure:
- a (four byte) word holding the length of this record, in words,
- a word that always seems to be set to "2",
- the path to a shared library, null-terminated and then padded
to a whole word boundary.
bfd_assert calls have been added to alert if an attempt is made
to write a section which doesn't follow these assumptions. The
code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
<robertl@arnet.com> (Thanks!).
Gvran Uddeborg <gvran@uddeborg.pp.se> */
if (strcmp (section->name, _LIB) == 0)
{
bfd_byte *rec, *recend;
rec = (bfd_byte *) location;
recend = rec + count;
while (rec < recend)
{
++section->lma;
rec += bfd_get_32 (abfd, rec) * 4;
}
BFD_ASSERT (rec == recend);
}
#endif
/* Don't write out bss sections - one way to do this is to
see if the filepos has not been set. */
if (section->filepos == 0)
return true;
if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
return false;
if (count != 0)
{
return (bfd_write (location, 1, count, abfd) == count) ? true : false;
}
return true;
}
#if 0
static boolean
coff_close_and_cleanup (abfd)
bfd *abfd;
{
if (!bfd_read_p (abfd))
switch (abfd->format)
{
case bfd_archive:
if (!_bfd_write_archive_contents (abfd))
return false;
break;
case bfd_object:
if (!coff_write_object_contents (abfd))
return false;
break;
default:
bfd_set_error (bfd_error_invalid_operation);
return false;
}
/* We depend on bfd_close to free all the memory on the objalloc. */
return true;
}
#endif
static PTR
buy_and_read (abfd, where, seek_direction, size)
bfd *abfd;
file_ptr where;
int seek_direction;
size_t size;
{
PTR area = (PTR) bfd_alloc (abfd, size);
if (!area)
return (NULL);
if (bfd_seek (abfd, where, seek_direction) != 0
|| bfd_read (area, 1, size, abfd) != size)
return (NULL);
return (area);
} /* buy_and_read() */
/*
SUBSUBSECTION
Reading linenumbers
Creating the linenumber table is done by reading in the entire
coff linenumber table, and creating another table for internal use.
A coff linenumber table is structured so that each function
is marked as having a line number of 0. Each line within the
function is an offset from the first line in the function. The
base of the line number information for the table is stored in
the symbol associated with the function.
Note: The PE format uses line number 0 for a flag indicating a
new source file.
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) (bfd_coff_linesz (abfd) *
asect->lineno_count));
lineno_cache =
(alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
if (lineno_cache == NULL)
return false;
else
{
unsigned int counter = 0;
alent *cache_ptr = lineno_cache;
LINENO *src = native_lineno;
while (counter < asect->lineno_count)
{
struct internal_lineno dst;
bfd_coff_swap_lineno_in (abfd, src, &dst);
cache_ptr->line_number = dst.l_lnno;
if (cache_ptr->line_number == 0)
{
boolean warned;
long symndx;
coff_symbol_type *sym;
warned = false;
symndx = dst.l_addr.l_symndx;
if (symndx < 0
|| (unsigned long) symndx >= obj_raw_syment_count (abfd))
{
(*_bfd_error_handler)
(_("%s: warning: illegal symbol index %ld in line numbers"),
bfd_get_filename (abfd), dst.l_addr.l_symndx);
symndx = 0;
warned = true;
}
/* FIXME: We should not be casting between ints and
pointers like this. */
sym = ((coff_symbol_type *)
((symndx + obj_raw_syments (abfd))
->u.syment._n._n_n._n_zeroes));
cache_ptr->u.sym = (asymbol *) sym;
if (sym->lineno != NULL && ! warned)
{
(*_bfd_error_handler)
(_("%s: warning: duplicate line number information for `%s'"),
bfd_get_filename (abfd),
bfd_asymbol_name (&sym->symbol));
}
sym->lineno = cache_ptr;
}
else
{
cache_ptr->u.offset = dst.l_addr.l_paddr
- bfd_section_vma (abfd, asect);
} /* If no linenumber expect a symbol index */
cache_ptr++;
src++;
counter++;
}
cache_ptr->line_number = 0;
}
asect->lineno = lineno_cache;
/* FIXME, free native_lineno here, or use alloca or something. */
return true;
}
/* Slurp in the symbol table, converting it to generic form. Note
that if coff_relocate_section is defined, the linker will read
symbols via coff_link_add_symbols, rather than via this routine. */
static boolean
coff_slurp_symbol_table (abfd)
bfd * abfd;
{
combined_entry_type *native_symbols;
coff_symbol_type *cached_area;
unsigned int *table_ptr;
unsigned int number_of_symbols = 0;
if (obj_symbols (abfd))
return true;
/* Read in the symbol table */
if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
{
return (false);
} /* on error */
/* Allocate enough room for all the symbols in cached form */
cached_area = ((coff_symbol_type *)
bfd_alloc (abfd,
(obj_raw_syment_count (abfd)
* sizeof (coff_symbol_type))));
if (cached_area == NULL)
return false;
table_ptr = ((unsigned int *)
bfd_alloc (abfd,
(obj_raw_syment_count (abfd)
* sizeof (unsigned int))));
if (table_ptr == NULL)
return false;
else
{
coff_symbol_type *dst = cached_area;
unsigned int last_native_index = obj_raw_syment_count (abfd);
unsigned int this_index = 0;
while (this_index < last_native_index)
{
combined_entry_type *src = native_symbols + this_index;
table_ptr[this_index] = number_of_symbols;
dst->symbol.the_bfd = abfd;
dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
/* We use the native name field to point to the cached field. */
src->u.syment._n._n_n._n_zeroes = (long) dst;
dst->symbol.section = coff_section_from_bfd_index (abfd,
src->u.syment.n_scnum);
dst->symbol.flags = 0;
dst->done_lineno = false;
switch (src->u.syment.n_sclass)
{
#ifdef I960
case C_LEAFEXT:
#if 0
dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
#endif
/* Fall through to next case */
#endif
case C_EXT:
case C_WEAKEXT:
#if defined ARM
case C_THUMBEXT:
case C_THUMBEXTFUNC:
#endif
#ifdef RS6000COFF_C
case C_HIDEXT:
#endif
#ifdef C_SYSTEM
case C_SYSTEM: /* System Wide variable */
#endif
#ifdef COFF_WITH_PE
/* In PE, 0x68 (104) denotes a section symbol */
case C_SECTION:
/* In PE, 0x69 (105) denotes a weak external symbol. */
case C_NT_WEAK:
#endif
switch (coff_classify_symbol (abfd, &src->u.syment))
{
case COFF_SYMBOL_GLOBAL:
dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
#if defined COFF_WITH_PE
/* PE sets the symbol to a value relative to the
start of the section. */
dst->symbol.value = src->u.syment.n_value;
#else
dst->symbol.value = (src->u.syment.n_value
- dst->symbol.section->vma);
#endif
if (ISFCN ((src->u.syment.n_type)))
{
/* A function ext does not go at the end of a
file. */
dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
}
break;
case COFF_SYMBOL_COMMON:
dst->symbol.section = bfd_com_section_ptr;
dst->symbol.value = src->u.syment.n_value;
break;
case COFF_SYMBOL_UNDEFINED:
dst->symbol.section = bfd_und_section_ptr;
dst->symbol.value = 0;
break;
case COFF_SYMBOL_PE_SECTION:
dst->symbol.flags |= BSF_EXPORT | BSF_SECTION_SYM;
dst->symbol.value = 0;
break;
case COFF_SYMBOL_LOCAL:
dst->symbol.flags = BSF_LOCAL;
#if defined COFF_WITH_PE
/* PE sets the symbol to a value relative to the
start of the section. */
dst->symbol.value = src->u.syment.n_value;
#else
dst->symbol.value = (src->u.syment.n_value
- dst->symbol.section->vma);
#endif
if (ISFCN ((src->u.syment.n_type)))
dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
break;
}
#ifdef RS6000COFF_C
/* A symbol with a csect entry should not go at the end. */
if (src->u.syment.n_numaux > 0)
dst->symbol.flags |= BSF_NOT_AT_END;
#endif
#ifdef COFF_WITH_PE
if (src->u.syment.n_sclass == C_NT_WEAK)
dst->symbol.flags = BSF_WEAK;
if (src->u.syment.n_sclass == C_SECTION
&& src->u.syment.n_scnum > 0)
{
dst->symbol.flags = BSF_LOCAL;
}
#endif
if (src->u.syment.n_sclass == C_WEAKEXT)
dst->symbol.flags = BSF_WEAK;
break;
case C_STAT: /* static */
#ifdef I960
case C_LEAFSTAT: /* static leaf procedure */
#endif
#if defined ARM
case C_THUMBSTAT: /* Thumb static */
case C_THUMBLABEL: /* Thumb label */
case C_THUMBSTATFUNC:/* Thumb static function */
#endif
case C_LABEL: /* label */
if (src->u.syment.n_scnum == N_DEBUG)
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)
{
#if defined COFF_WITH_PE
/* PE sets the symbol to a value relative to the
start of the section. */
dst->symbol.value = src->u.syment.n_value;
#else
dst->symbol.value = (src->u.syment.n_value
- dst->symbol.section->vma);
#endif
}
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 */
/* C_AUTOARG conflictes with TI COFF C_UEXT */
#if !defined (TIC80COFF) && !defined (TICOFF)
#ifdef C_AUTOARG
case C_AUTOARG: /* 960-specific storage class */
#endif
#endif
case C_TPDEF: /* type definition */
case C_ARG:
case C_AUTO: /* automatic variable */
case C_FIELD: /* bit field */
case C_ENTAG: /* enumeration tag */
case C_MOE: /* member of enumeration */
case C_MOU: /* member of union */
case C_UNTAG: /* union tag */
dst->symbol.flags = BSF_DEBUGGING;
dst->symbol.value = (src->u.syment.n_value);
break;
case C_FILE: /* file name */
case C_STRTAG: /* structure tag */
#ifdef RS6000COFF_C
case C_GSYM:
case C_LSYM:
case C_PSYM:
case C_RSYM:
case C_RPSYM:
case C_STSYM:
case C_BCOMM:
case C_ECOMM:
case C_DECL:
case C_ENTRY:
case C_FUN:
case C_ESTAT:
#endif
dst->symbol.flags = BSF_DEBUGGING;
dst->symbol.value = (src->u.syment.n_value);
break;
#ifdef RS6000COFF_C
case C_BINCL: /* beginning of include file */
case C_EINCL: /* ending of include file */
/* The value is actually a pointer into the line numbers
of the file. We locate the line number entry, and
set the section to the section which contains it, and
the value to the index in that section. */
{
asection *sec;
dst->symbol.flags = BSF_DEBUGGING;
for (sec = abfd->sections; sec != NULL; sec = sec->next)
if (sec->line_filepos <= (file_ptr) src->u.syment.n_value
&& ((file_ptr) (sec->line_filepos
+ sec->lineno_count * bfd_coff_linesz (abfd))
> (file_ptr) src->u.syment.n_value))
break;
if (sec == NULL)
dst->symbol.value = 0;
else
{
dst->symbol.section = sec;
dst->symbol.value = ((src->u.syment.n_value
- sec->line_filepos)
/ bfd_coff_linesz (abfd));
src->fix_line = 1;
}
}
break;
case C_BSTAT:
dst->symbol.flags = BSF_DEBUGGING;
/* The value is actually a symbol index. Save a pointer
to the symbol instead of the index. FIXME: This
should use a union. */
src->u.syment.n_value =
(long) (native_symbols + src->u.syment.n_value);
dst->symbol.value = src->u.syment.n_value;
src->fix_value = 1;
break;
#endif
case C_BLOCK: /* ".bb" or ".eb" */
case C_FCN: /* ".bf" or ".ef" (or PE ".lf") */
case C_EFCN: /* physical end of function */
#if defined COFF_WITH_PE
/* PE sets the symbol to a value relative to the start
of the section. */
dst->symbol.value = src->u.syment.n_value;
if (strcmp (dst->symbol.name, ".bf") != 0)
{
/* PE uses funny values for .ef and .lf; don't
relocate them. */
dst->symbol.flags = BSF_DEBUGGING;
}
else
dst->symbol.flags = BSF_DEBUGGING | BSF_DEBUGGING_RELOC;
#else
/* Base the value as an index from the base of the
section. */
dst->symbol.flags = BSF_LOCAL;
dst->symbol.value = (src->u.syment.n_value
- dst->symbol.section->vma);
#endif
break;
case C_STATLAB: /* Static load time label */
dst->symbol.value = src->u.syment.n_value;
dst->symbol.flags = BSF_GLOBAL;
break;
case C_NULL:
/* PE DLLs sometimes have zeroed out symbols for some
reason. Just ignore them without a warning. */
if (src->u.syment.n_type == 0
&& src->u.syment.n_value == 0
&& src->u.syment.n_scnum == 0)
break;
/* Fall through. */
case C_EXTDEF: /* external definition */
case C_ULABEL: /* undefined label */
case C_USTATIC: /* undefined static */
#ifndef COFF_WITH_PE
/* C_LINE in regular coff is 0x68. NT has taken over this storage
class to represent a section symbol */
case C_LINE: /* line # reformatted as symbol table entry */
/* NT uses 0x67 for a weak symbol, not C_ALIAS. */
case C_ALIAS: /* duplicate tag */
#endif
/* New storage classes for TI COFF */
#if defined(TIC80COFF) || defined(TICOFF)
case C_UEXT: /* Tentative external definition */
#endif
case C_EXTLAB: /* External load time label */
case C_HIDDEN: /* ext symbol in dmert public lib */
default:
(*_bfd_error_handler)
(_("%s: Unrecognized storage class %d for %s symbol `%s'"),
bfd_get_filename (abfd), src->u.syment.n_sclass,
dst->symbol.section->name, dst->symbol.name);
dst->symbol.flags = BSF_DEBUGGING;
dst->symbol.value = (src->u.syment.n_value);
break;
}
/* BFD_ASSERT(dst->symbol.flags != 0);*/
dst->native = src;
dst->symbol.udata.i = 0;
dst->lineno = (alent *) NULL;
this_index += (src->u.syment.n_numaux) + 1;
dst++;
number_of_symbols++;
} /* walk the native symtab */
} /* bfdize the native symtab */
obj_symbols (abfd) = cached_area;
obj_raw_syments (abfd) = native_symbols;
bfd_get_symcount (abfd) = number_of_symbols;
obj_convert (abfd) = table_ptr;
/* Slurp the line tables for each section too */
{
asection *p;
p = abfd->sections;
while (p)
{
coff_slurp_line_table (abfd, p);
p = p->next;
}
}
return true;
} /* coff_slurp_symbol_table() */
/* Classify a COFF symbol. A couple of targets have globally visible
symbols which are not class C_EXT, and this handles those. It also
recognizes some special PE cases. */
static enum coff_symbol_classification
coff_classify_symbol (abfd, syment)
bfd *abfd;
struct internal_syment *syment;
{
/* FIXME: This partially duplicates the switch in
coff_slurp_symbol_table. */
switch (syment->n_sclass)
{
case C_EXT:
case C_WEAKEXT:
#ifdef I960
case C_LEAFEXT:
#endif
#ifdef ARM
case C_THUMBEXT:
case C_THUMBEXTFUNC:
#endif
#ifdef C_SYSTEM
case C_SYSTEM:
#endif
#ifdef COFF_WITH_PE
case C_NT_WEAK:
#endif
if (syment->n_scnum == 0)
{
if (syment->n_value == 0)
return COFF_SYMBOL_UNDEFINED;
else
return COFF_SYMBOL_COMMON;
}
return COFF_SYMBOL_GLOBAL;
default:
break;
}
#ifdef COFF_WITH_PE
if (syment->n_sclass == C_STAT)
{
if (syment->n_scnum == 0)
{
/* The Microsoft compiler sometimes generates these if a
small static function is inlined every time it is used.
The function is discarded, but the symbol table entry
remains. */
return COFF_SYMBOL_LOCAL;
}
#ifdef STRICT_PE_FORMAT
/* This is correct for Microsoft generated objects, but it
breaks gas generated objects. */
if (syment->n_value == 0)
{
asection *sec;
char buf[SYMNMLEN + 1];
sec = coff_section_from_bfd_index (abfd, syment->n_scnum);
if (sec != NULL
&& (strcmp (bfd_get_section_name (abfd, sec),
_bfd_coff_internal_syment_name (abfd, syment, buf))
== 0))
return COFF_SYMBOL_PE_SECTION;
}
#endif
return COFF_SYMBOL_LOCAL;
}
if (syment->n_sclass == C_SECTION)
{
/* In some cases in a DLL generated by the Microsoft linker, the
n_value field will contain garbage. FIXME: This should
probably be handled by the swapping function instead. */
syment->n_value = 0;
if (syment->n_scnum == 0)
return COFF_SYMBOL_UNDEFINED;
return COFF_SYMBOL_PE_SECTION;
}
#endif /* COFF_WITH_PE */
/* If it is not a global symbol, we presume it is a local symbol. */
if (syment->n_scnum == 0)
{
char buf[SYMNMLEN + 1];
(*_bfd_error_handler)
(_("warning: %s: local symbol `%s' has no section"),
bfd_get_filename (abfd),
_bfd_coff_internal_syment_name (abfd, syment, buf));
}
return COFF_SYMBOL_LOCAL;
}
/*
SUBSUBSECTION
Reading relocations
Coff relocations are easily transformed into the internal BFD form
(@code{arelent}).
Reading a coff relocation table is done in the following stages:
o Read the entire coff relocation table into memory.
o Process each relocation in turn; first swap it from the
external to the internal form.
o Turn the symbol referenced in the relocation's symbol index
into a pointer into the canonical symbol table.
This table is the same as the one returned by a call to
@code{bfd_canonicalize_symtab}. The back end will call that
routine and save the result if a canonicalization hasn't been done.
o The reloc index is turned into a pointer to a howto
structure, in a back end specific way. For instance, the 386
and 960 use the @code{r_type} to directly produce an index
into a howto table vector; the 88k subtracts a number from the
@code{r_type} field and creates an addend field.
*/
#ifndef CALC_ADDEND
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
{ \
coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
coffsym = (obj_symbols (abfd) \
+ (cache_ptr->sym_ptr_ptr - symbols)); \
else if (ptr) \
coffsym = coff_symbol_from (abfd, ptr); \
if (coffsym != (coff_symbol_type *) NULL \
&& coffsym->native->u.syment.n_scnum == 0) \
cache_ptr->addend = 0; \
else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
&& ptr->section != (asection *) NULL) \
cache_ptr->addend = - (ptr->section->vma + ptr->value); \
else \
cache_ptr->addend = 0; \
}
#endif
static boolean
coff_slurp_reloc_table (abfd, asect, symbols)
bfd * abfd;
sec_ptr asect;
asymbol ** symbols;
{
RELOC *native_relocs;
arelent *reloc_cache;
arelent *cache_ptr;
unsigned int idx;
if (asect->relocation)
return true;
if (asect->reloc_count == 0)
return true;
if (asect->flags & SEC_CONSTRUCTOR)
return true;
if (!coff_slurp_symbol_table (abfd))
return false;
native_relocs =
(RELOC *) buy_and_read (abfd,
asect->rel_filepos,
SEEK_SET,
(size_t) (bfd_coff_relsz (abfd) *
asect->reloc_count));
reloc_cache = (arelent *)
bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
if (reloc_cache == NULL)
return false;
for (idx = 0; idx < asect->reloc_count; idx++)
{
struct internal_reloc dst;
struct external_reloc *src;
#ifndef RELOC_PROCESSING
asymbol *ptr;
#endif
cache_ptr = reloc_cache + idx;
src = native_relocs + idx;
coff_swap_reloc_in (abfd, src, &dst);
#ifdef RELOC_PROCESSING
RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
#else
cache_ptr->address = dst.r_vaddr;
if (dst.r_symndx != -1)
{
if (dst.r_symndx < 0 || dst.r_symndx >= obj_conv_table_size (abfd))
{
(*_bfd_error_handler)
(_("%s: warning: illegal symbol index %ld in relocs"),
bfd_get_filename (abfd), dst.r_symndx);
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
ptr = NULL;
}
else
{
cache_ptr->sym_ptr_ptr = (symbols
+ obj_convert (abfd)[dst.r_symndx]);
ptr = *(cache_ptr->sym_ptr_ptr);
}
}
else
{
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
ptr = NULL;
}
/* 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 /* RELOC_PROCESSING */
if (cache_ptr->howto == NULL)
{
(*_bfd_error_handler)
(_("%s: illegal relocation type %d at address 0x%lx"),
bfd_get_filename (abfd), dst.r_type, (long) dst.r_vaddr);
bfd_set_error (bfd_error_bad_value);
return false;
}
}
asect->relocation = reloc_cache;
return true;
}
#ifndef coff_rtype_to_howto
#ifdef RTYPE2HOWTO
/* Get the howto structure for a reloc. This is only used if the file
including this one defines coff_relocate_section to be
_bfd_coff_generic_relocate_section, so it is OK if it does not
always work. It is the responsibility of the including file to
make sure it is reasonable if it is needed. */
static reloc_howto_type *coff_rtype_to_howto
PARAMS ((bfd *, asection *, struct internal_reloc *,
struct coff_link_hash_entry *, struct internal_syment *,
bfd_vma *));
/*ARGSUSED*/
static reloc_howto_type *
coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
bfd *abfd ATTRIBUTE_UNUSED;
asection *sec ATTRIBUTE_UNUSED;
struct internal_reloc *rel;
struct coff_link_hash_entry *h ATTRIBUTE_UNUSED;
struct internal_syment *sym ATTRIBUTE_UNUSED;
bfd_vma *addendp ATTRIBUTE_UNUSED;
{
arelent genrel;
RTYPE2HOWTO (&genrel, rel);
return genrel.howto;
}
#else /* ! defined (RTYPE2HOWTO) */
#define coff_rtype_to_howto NULL
#endif /* ! defined (RTYPE2HOWTO) */
#endif /* ! defined (coff_rtype_to_howto) */
/* This is stupid. This function should be a boolean predicate. */
static long
coff_canonicalize_reloc (abfd, section, relptr, symbols)
bfd * abfd;
sec_ptr section;
arelent ** relptr;
asymbol ** symbols;
{
arelent *tblptr = section->relocation;
unsigned int count = 0;
if (section->flags & SEC_CONSTRUCTOR)
{
/* this section has relocs made up by us, they are not in the
file, so take them out of their chain and place them into
the data area provided */
arelent_chain *chain = section->constructor_chain;
for (count = 0; count < section->reloc_count; count++)
{
*relptr++ = &chain->relent;
chain = chain->next;
}
}
else
{
if (! coff_slurp_reloc_table (abfd, section, symbols))
return -1;
tblptr = section->relocation;
for (; count++ < section->reloc_count;)
*relptr++ = tblptr++;
}
*relptr = 0;
return section->reloc_count;
}
#ifdef GNU960
file_ptr
coff_sym_filepos (abfd)
bfd *abfd;
{
return obj_sym_filepos (abfd);
}
#endif
#ifndef coff_reloc16_estimate
#define coff_reloc16_estimate dummy_reloc16_estimate
static int dummy_reloc16_estimate
PARAMS ((bfd *, asection *, arelent *, unsigned int,
struct bfd_link_info *));
static int
dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
bfd *abfd ATTRIBUTE_UNUSED;
asection *input_section ATTRIBUTE_UNUSED;
arelent *reloc ATTRIBUTE_UNUSED;
unsigned int shrink ATTRIBUTE_UNUSED;
struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
{
abort ();
return 0;
}
#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
PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
bfd_byte *, unsigned int *, unsigned int *));
static void
dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
dst_ptr)
bfd *abfd ATTRIBUTE_UNUSED;
struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
struct bfd_link_order *link_order ATTRIBUTE_UNUSED;
arelent *reloc ATTRIBUTE_UNUSED;
bfd_byte *data ATTRIBUTE_UNUSED;
unsigned int *src_ptr ATTRIBUTE_UNUSED;
unsigned int *dst_ptr ATTRIBUTE_UNUSED;
{
abort ();
}
#endif
/* If coff_relocate_section is defined, we can use the optimized COFF
backend linker. Otherwise we must continue to use the old linker. */
#ifdef coff_relocate_section
#ifndef coff_bfd_link_hash_table_create
#define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
#endif
#ifndef coff_bfd_link_add_symbols
#define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
#endif
#ifndef coff_bfd_final_link
#define coff_bfd_final_link _bfd_coff_final_link
#endif
#else /* ! defined (coff_relocate_section) */
#define coff_relocate_section NULL
#ifndef coff_bfd_link_hash_table_create
#define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#endif
#ifndef coff_bfd_link_add_symbols
#define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
#endif
#define coff_bfd_final_link _bfd_generic_final_link
#endif /* ! defined (coff_relocate_section) */
#define coff_bfd_link_split_section _bfd_generic_link_split_section
#ifndef coff_start_final_link
#define coff_start_final_link NULL
#endif
#ifndef coff_adjust_symndx
#define coff_adjust_symndx NULL
#endif
#ifndef coff_link_add_one_symbol
#define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
#endif
#ifndef coff_link_output_has_begun
static boolean coff_link_output_has_begun
PARAMS ((bfd *, struct coff_final_link_info *));
static boolean
coff_link_output_has_begun (abfd, info)
bfd * abfd;
struct coff_final_link_info * info ATTRIBUTE_UNUSED;
{
return abfd->output_has_begun;
}
#endif
#ifndef coff_final_link_postscript
static boolean coff_final_link_postscript
PARAMS ((bfd *, struct coff_final_link_info *));
static boolean
coff_final_link_postscript (abfd, pfinfo)
bfd * abfd ATTRIBUTE_UNUSED;
struct coff_final_link_info * pfinfo ATTRIBUTE_UNUSED;
{
return true;
}
#endif
#ifndef coff_SWAP_aux_in
#define coff_SWAP_aux_in coff_swap_aux_in
#endif
#ifndef coff_SWAP_sym_in
#define coff_SWAP_sym_in coff_swap_sym_in
#endif
#ifndef coff_SWAP_lineno_in
#define coff_SWAP_lineno_in coff_swap_lineno_in
#endif
#ifndef coff_SWAP_aux_out
#define coff_SWAP_aux_out coff_swap_aux_out
#endif
#ifndef coff_SWAP_sym_out
#define coff_SWAP_sym_out coff_swap_sym_out
#endif
#ifndef coff_SWAP_lineno_out
#define coff_SWAP_lineno_out coff_swap_lineno_out
#endif
#ifndef coff_SWAP_reloc_out
#define coff_SWAP_reloc_out coff_swap_reloc_out
#endif
#ifndef coff_SWAP_filehdr_out
#define coff_SWAP_filehdr_out coff_swap_filehdr_out
#endif
#ifndef coff_SWAP_aouthdr_out
#define coff_SWAP_aouthdr_out coff_swap_aouthdr_out
#endif
#ifndef coff_SWAP_scnhdr_out
#define coff_SWAP_scnhdr_out coff_swap_scnhdr_out
#endif
#ifndef coff_SWAP_reloc_in
#define coff_SWAP_reloc_in coff_swap_reloc_in
#endif
#ifndef coff_SWAP_filehdr_in
#define coff_SWAP_filehdr_in coff_swap_filehdr_in
#endif
#ifndef coff_SWAP_aouthdr_in
#define coff_SWAP_aouthdr_in coff_swap_aouthdr_in
#endif
#ifndef coff_SWAP_scnhdr_in
#define coff_SWAP_scnhdr_in coff_swap_scnhdr_in
#endif
static const bfd_coff_backend_data bfd_coff_std_swap_table =
{
coff_SWAP_aux_in, coff_SWAP_sym_in, coff_SWAP_lineno_in,
coff_SWAP_aux_out, coff_SWAP_sym_out,
coff_SWAP_lineno_out, coff_SWAP_reloc_out,
coff_SWAP_filehdr_out, coff_SWAP_aouthdr_out,
coff_SWAP_scnhdr_out,
FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ, FILNMLEN,
#ifdef COFF_LONG_FILENAMES
true,
#else
false,
#endif
#ifdef COFF_LONG_SECTION_NAMES
true,
#else
false,
#endif
COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
#ifdef COFF_FORCE_SYMBOLS_IN_STRINGS
true,
#else
false,
#endif
#ifdef COFF_DEBUG_STRING_WIDE_PREFIX
4,
#else
2,
#endif
coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
coff_classify_symbol, coff_compute_section_file_positions,
coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
coff_adjust_symndx, coff_link_add_one_symbol,
coff_link_output_has_begun, coff_final_link_postscript
};
#ifndef coff_close_and_cleanup
#define coff_close_and_cleanup _bfd_generic_close_and_cleanup
#endif
#ifndef coff_bfd_free_cached_info
#define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#endif
#ifndef coff_get_section_contents
#define coff_get_section_contents _bfd_generic_get_section_contents
#endif
#ifndef coff_bfd_copy_private_symbol_data
#define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
#endif
#ifndef coff_bfd_copy_private_section_data
#define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
#endif
#ifndef coff_bfd_copy_private_bfd_data
#define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
#endif
#ifndef coff_bfd_merge_private_bfd_data
#define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
#endif
#ifndef coff_bfd_set_private_flags
#define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
#endif
#ifndef coff_bfd_print_private_bfd_data
#define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
#endif
#ifndef coff_bfd_is_local_label_name
#define coff_bfd_is_local_label_name _bfd_coff_is_local_label_name
#endif
#ifndef coff_read_minisymbols
#define coff_read_minisymbols _bfd_generic_read_minisymbols
#endif
#ifndef coff_minisymbol_to_symbol
#define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
#endif
/* The reloc lookup routine must be supplied by each individual COFF
backend. */
#ifndef coff_bfd_reloc_type_lookup
#define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#endif
#ifndef coff_bfd_get_relocated_section_contents
#define coff_bfd_get_relocated_section_contents \
bfd_generic_get_relocated_section_contents
#endif
#ifndef coff_bfd_relax_section
#define coff_bfd_relax_section bfd_generic_relax_section
#endif
#ifndef coff_bfd_gc_sections
#define coff_bfd_gc_sections bfd_generic_gc_sections
#endif
#define CREATE_BIG_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE) \
const bfd_target VAR = \
{ \
NAME , \
bfd_target_coff_flavour, \
BFD_ENDIAN_BIG, /* data byte order is big */ \
BFD_ENDIAN_BIG, /* header byte order is big */ \
/* object flags */ \
(HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \
HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \
/* section flags */ \
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\
UNDER, /* leading symbol underscore */ \
'/', /* ar_pad_char */ \
15, /* ar_max_namelen */ \
\
/* Data conversion functions. */ \
bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
\
/* Header conversion functions. */ \
bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
\
/* bfd_check_format */ \
{ _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, \
_bfd_dummy_target }, \
/* bfd_set_format */ \
{ bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, \
/* bfd_write_contents */ \
{ bfd_false, coff_write_object_contents, _bfd_write_archive_contents, \
bfd_false }, \
\
BFD_JUMP_TABLE_GENERIC (coff), \
BFD_JUMP_TABLE_COPY (coff), \
BFD_JUMP_TABLE_CORE (_bfd_nocore), \
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \
BFD_JUMP_TABLE_SYMBOLS (coff), \
BFD_JUMP_TABLE_RELOCS (coff), \
BFD_JUMP_TABLE_WRITE (coff), \
BFD_JUMP_TABLE_LINK (coff), \
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \
\
ALTERNATIVE, \
\
COFF_SWAP_TABLE \
};
#define CREATE_LITTLE_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE) \
const bfd_target VAR = \
{ \
NAME , \
bfd_target_coff_flavour, \
BFD_ENDIAN_LITTLE, /* data byte order is little */ \
BFD_ENDIAN_LITTLE, /* header byte order is little */ \
/* object flags */ \
(HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \
HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \
/* section flags */ \
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\
UNDER, /* leading symbol underscore */ \
'/', /* ar_pad_char */ \
15, /* ar_max_namelen */ \
\
/* Data conversion functions. */ \
bfd_getl64, bfd_getl_signed_64, bfd_putl64, \
bfd_getl32, bfd_getl_signed_32, bfd_putl32, \
bfd_getl16, bfd_getl_signed_16, bfd_putl16, \
/* Header conversion functions. */ \
bfd_getl64, bfd_getl_signed_64, bfd_putl64, \
bfd_getl32, bfd_getl_signed_32, bfd_putl32, \
bfd_getl16, bfd_getl_signed_16, bfd_putl16, \
/* bfd_check_format */ \
{ _bfd_dummy_target, coff_object_p, bfd_generic_archive_p, \
_bfd_dummy_target }, \
/* bfd_set_format */ \
{ bfd_false, coff_mkobject, _bfd_generic_mkarchive, bfd_false }, \
/* bfd_write_contents */ \
{ bfd_false, coff_write_object_contents, _bfd_write_archive_contents, \
bfd_false }, \
\
BFD_JUMP_TABLE_GENERIC (coff), \
BFD_JUMP_TABLE_COPY (coff), \
BFD_JUMP_TABLE_CORE (_bfd_nocore), \
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \
BFD_JUMP_TABLE_SYMBOLS (coff), \
BFD_JUMP_TABLE_RELOCS (coff), \
BFD_JUMP_TABLE_WRITE (coff), \
BFD_JUMP_TABLE_LINK (coff), \
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \
\
ALTERNATIVE, \
\
COFF_SWAP_TABLE \
};