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/* Support for the generic parts of most COFF variants, for BFD.
Copyright (C) 1990-2024 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, 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 i386 coff format is implemented in the file
@file{coff-i386.c}. This file @code{#include}s
@file{coff/i386.h} which defines the external structure of the
coff format for the i386, and @file{coff/internal.h} which
defines the internal structure. @file{coff-i386.c} also
defines the relocations used by the i386 coff format
@xref{Relocations}.
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.
SUBSUBSECTION
Coff long section names
In the standard Coff object format, section names are limited to
the eight bytes available in the @code{s_name} field of the
@code{SCNHDR} section header structure. The format requires the
field to be NUL-padded, but not necessarily NUL-terminated, so
the longest section names permitted are a full eight characters.
The Microsoft PE variants of the Coff object file format add
an extension to support the use of long section names. This
extension is defined in section 4 of the Microsoft PE/COFF
specification (rev 8.1). If a section name is too long to fit
into the section header's @code{s_name} field, it is instead
placed into the string table, and the @code{s_name} field is
filled with a slash ("/") followed by the ASCII decimal
representation of the offset of the full name relative to the
string table base.
Note that this implies that the extension can only be used in object
files, as executables do not contain a string table. The standard
specifies that long section names from objects emitted into executable
images are to be truncated.
However, as a GNU extension, BFD can generate executable images
that contain a string table and long section names. This
would appear to be technically valid, as the standard only says
that Coff debugging information is deprecated, not forbidden,
and in practice it works, although some tools that parse PE files
expecting the MS standard format may become confused; @file{PEview} is
one known example.
The functionality is supported in BFD by code implemented under
the control of the macro @code{COFF_LONG_SECTION_NAMES}. If not
defined, the format does not support long section names in any way.
If defined, it is used to initialise a flag,
@code{_bfd_coff_long_section_names}, and a hook function pointer,
@code{_bfd_coff_set_long_section_names}, in the Coff backend data
structure. The flag controls the generation of long section names
in output BFDs at runtime; if it is false, as it will be by default
when generating an executable image, long section names are truncated;
if true, the long section names extension is employed. The hook
points to a function that allows the value of a copy of the flag
in coff object tdata to be altered at runtime, on formats that
support long section names at all; on other formats it points
to a stub that returns an error indication.
With input BFDs, the flag is set according to whether any long section
names are detected while reading the section headers. For a completely
new BFD, the flag is set to the default for the target format. This
information can be used by a client of the BFD library when deciding
what output format to generate, and means that a BFD that is opened
for read and subsequently converted to a writeable BFD and modified
in-place will retain whatever format it had on input.
If @code{COFF_LONG_SECTION_NAMES} is simply defined (blank), or is
defined to the value "1", then long section names are enabled by
default; if it is defined to the value zero, they are disabled by
default (but still accepted in input BFDs). The header @file{coffcode.h}
defines a macro, @code{COFF_DEFAULT_LONG_SECTION_NAMES}, which is
used in the backends to initialise the backend data structure fields
appropriately; see the comments for further detail.
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 hierarchy 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;
.
. {* Selects between the elements of the union below. *}
. unsigned int is_sym : 1;
.
. {* Selects between the elements of the x_sym.x_tagndx union. If set,
. p is valid and the field will be renumbered. *}
. unsigned int fix_tag : 1;
.
. {* Selects between the elements of the x_sym.x_fcnary.x_fcn.x_endndx
. union. If set, p is valid and the field will be renumbered. *}
. unsigned int fix_end : 1;
.
. {* Selects between the elements of the x_csect.x_scnlen union. If set,
. p is valid and the field will be renumbered. *}
. unsigned int fix_scnlen : 1;
.
. {* If set, u.syment.n_value contains a pointer to a symbol. The final
. value will be the offset field. Used for XCOFF C_BSTAT symbols. *}
. unsigned int fix_value : 1;
.
. {* If set, u.syment.n_value is an index into the line number entries.
. Used for XCOFF C_BINCL/C_EINCL symbols. *}
. 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;
.
. {* An extra pointer which can used by format based on COFF (like XCOFF)
. to provide extra information to their backend. *}
. void *extrap;
.} 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 ? *}
. bool done_lineno;
.} coff_symbol_type;
.
*/
#include "libiberty.h"
#include <string.h>
#ifdef COFF_WITH_PE
#include "peicode.h"
#else
#include "coffswap.h"
#endif
#define STRING_SIZE_SIZE 4
#define DOT_DEBUG ".debug"
#define DOT_ZDEBUG ".zdebug"
#define GNU_LINKONCE_WI ".gnu.linkonce.wi."
#define GNU_LINKONCE_WT ".gnu.linkonce.wt."
#define DOT_RELOC ".reloc"
#if defined(COFF_WITH_PE) || defined(COFF_GO32_EXE) || defined(COFF_GO32)
# define COFF_WITH_EXTENDED_RELOC_COUNTER
#endif
#if defined (COFF_LONG_SECTION_NAMES)
/* Needed to expand the inputs to BLANKOR1TOODD. */
#define COFFLONGSECTIONCATHELPER(x,y) x ## y
/* If the input macro Y is blank or '1', return an odd number; if it is
'0', return an even number. Result undefined in all other cases. */
#define BLANKOR1TOODD(y) COFFLONGSECTIONCATHELPER(1,y)
/* Defined to numerical 0 or 1 according to whether generation of long
section names is disabled or enabled by default. */
#define COFF_ENABLE_LONG_SECTION_NAMES (BLANKOR1TOODD(COFF_LONG_SECTION_NAMES) & 1)
/* Where long section names are supported, we allow them to be enabled
and disabled at runtime, so select an appropriate hook function for
_bfd_coff_set_long_section_names. */
#define COFF_LONG_SECTION_NAMES_SETTER bfd_coff_set_long_section_names_allowed
#else /* !defined (COFF_LONG_SECTION_NAMES) */
/* If long section names are not supported, this stub disallows any
attempt to enable them at run-time. */
#define COFF_LONG_SECTION_NAMES_SETTER bfd_coff_set_long_section_names_disallowed
#endif /* defined (COFF_LONG_SECTION_NAMES) */
/* Define a macro that can be used to initialise both the fields relating
to long section names in the backend data struct simultaneously. */
#if COFF_ENABLE_LONG_SECTION_NAMES
#define COFF_DEFAULT_LONG_SECTION_NAMES (true), COFF_LONG_SECTION_NAMES_SETTER
#else /* !COFF_ENABLE_LONG_SECTION_NAMES */
#define COFF_DEFAULT_LONG_SECTION_NAMES (false), COFF_LONG_SECTION_NAMES_SETTER
#endif /* COFF_ENABLE_LONG_SECTION_NAMES */
static enum coff_symbol_classification coff_classify_symbol
(bfd *, struct internal_syment *);
/* void warning(); */
#if defined (COFF_LONG_SECTION_NAMES)
static bool
bfd_coff_set_long_section_names_allowed (bfd *abfd, int enable)
{
bfd_coff_long_section_names (abfd) = enable;
return true;
}
#else /* !defined (COFF_LONG_SECTION_NAMES) */
static bool
bfd_coff_set_long_section_names_disallowed (bfd *abfd ATTRIBUTE_UNUSED,
int enable ATTRIBUTE_UNUSED)
{
return false;
}
#endif /* defined (COFF_LONG_SECTION_NAMES) */
/* 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 (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 (startswith (sec_name, DOT_DEBUG)
|| startswith (sec_name, DOT_ZDEBUG))
{
/* 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 (startswith (sec_name, ".stab"))
{
styp_flags = STYP_DEBUG_INFO;
}
#ifdef COFF_LONG_SECTION_NAMES
else if (startswith (sec_name, GNU_LINKONCE_WI)
|| startswith (sec_name, GNU_LINKONCE_WT))
{
styp_flags = STYP_DEBUG_INFO;
}
#endif
#ifdef RS6000COFF_C
else if (!strcmp (sec_name, _TDATA))
{
styp_flags = STYP_TDATA;
}
else if (!strcmp (sec_name, _TBSS))
{
styp_flags = STYP_TBSS;
}
else if (!strcmp (sec_name, _PAD))
{
styp_flags = STYP_PAD;
}
else if (!strcmp (sec_name, _LOADER))
{
styp_flags = STYP_LOADER;
}
else if (!strcmp (sec_name, _EXCEPT))
{
styp_flags = STYP_EXCEPT;
}
else if (!strcmp (sec_name, _TYPCHK))
{
styp_flags = STYP_TYPCHK;
}
else if (sec_flags & SEC_DEBUGGING)
{
int i;
for (i = 0; i < XCOFF_DWSECT_NBR_NAMES; i++)
if (!strcmp (sec_name, xcoff_dwsect_names[i].xcoff_name))
{
styp_flags = STYP_DWARF | xcoff_dwsect_names[i].flag;
break;
}
}
#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_TIC54X_CLINK)
styp_flags |= STYP_CLINK;
#endif
#ifdef STYP_BLOCK
if (sec_flags & SEC_TIC54X_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 (const char *sec_name, flagword sec_flags)
{
long styp_flags = 0;
bool is_dbg = false;
if (startswith (sec_name, DOT_DEBUG)
|| startswith (sec_name, DOT_ZDEBUG)
#ifdef COFF_LONG_SECTION_NAMES
|| startswith (sec_name, GNU_LINKONCE_WI)
|| startswith (sec_name, GNU_LINKONCE_WT)
#endif
|| startswith (sec_name, ".stab"))
is_dbg = true;
/* 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. */
/* FIXME: There is no gas syntax to specify the debug section flag. */
if (is_dbg)
{
sec_flags &= (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
| SEC_LINK_DUPLICATES_SAME_CONTENTS
| SEC_LINK_DUPLICATES_SAME_SIZE);
sec_flags |= SEC_DEBUGGING | SEC_READONLY;
}
/* skip LOAD */
/* READONLY later */
/* skip RELOC */
if ((sec_flags & SEC_CODE) != 0)
styp_flags |= IMAGE_SCN_CNT_CODE;
if ((sec_flags & (SEC_DATA | SEC_DEBUGGING)) != 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 */
#ifndef COFF_IMAGE_WITH_PE
/* I don't think any of the IMAGE_SCN_LNK_* flags set below should be set
when the output is PE. Only object files should have them, for the linker
to consume. */
if ((sec_flags & SEC_IS_COMMON) != 0)
styp_flags |= IMAGE_SCN_LNK_COMDAT;
#endif
if ((sec_flags & SEC_DEBUGGING) != 0)
styp_flags |= IMAGE_SCN_MEM_DISCARDABLE;
if ((sec_flags & (SEC_EXCLUDE | SEC_NEVER_LOAD)) != 0 && !is_dbg)
#ifdef COFF_IMAGE_WITH_PE
styp_flags |= IMAGE_SCN_MEM_DISCARDABLE;
#else
styp_flags |= IMAGE_SCN_LNK_REMOVE;
#endif
/* skip IN_MEMORY */
/* skip SORT */
#ifndef COFF_IMAGE_WITH_PE
if (sec_flags & SEC_LINK_ONCE)
styp_flags |= IMAGE_SCN_LNK_COMDAT;
if ((sec_flags
& (SEC_LINK_DUPLICATES_DISCARD | SEC_LINK_DUPLICATES_SAME_CONTENTS
| SEC_LINK_DUPLICATES_SAME_SIZE)) != 0)
styp_flags |= IMAGE_SCN_LNK_COMDAT;
#endif
/* skip LINKER_CREATED */
if ((sec_flags & SEC_COFF_NOREAD) == 0)
styp_flags |= IMAGE_SCN_MEM_READ; /* Invert NOREAD for read. */
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_COFF_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 bool
styp_to_sec_flags (bfd *abfd,
void * hdr,
const char *name,
asection *section ATTRIBUTE_UNUSED,
flagword *flags_ptr)
{
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
unsigned long styp_flags = internal_s->s_flags;
flagword sec_flags = 0;
#ifdef STYP_BLOCK
if (styp_flags & STYP_BLOCK)
sec_flags |= SEC_TIC54X_BLOCK;
#endif
#ifdef STYP_CLINK
if (styp_flags & STYP_CLINK)
sec_flags |= SEC_TIC54X_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;
#ifdef RS6000COFF_C
else if (styp_flags & STYP_TDATA)
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_DATA | SEC_THREAD_LOCAL | SEC_COFF_SHARED_LIBRARY;
else
sec_flags |= SEC_DATA | SEC_THREAD_LOCAL | SEC_LOAD | SEC_ALLOC;
}
else if (styp_flags & STYP_TBSS)
{
#ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_ALLOC | SEC_THREAD_LOCAL | SEC_COFF_SHARED_LIBRARY;
else
#endif
sec_flags |= SEC_ALLOC | SEC_THREAD_LOCAL;
}
else if (styp_flags & STYP_EXCEPT)
sec_flags |= SEC_LOAD;
else if (styp_flags & STYP_LOADER)
sec_flags |= SEC_LOAD;
else if (styp_flags & STYP_TYPCHK)
sec_flags |= SEC_LOAD;
else if (styp_flags & STYP_DWARF)
sec_flags |= SEC_DEBUGGING;
#endif
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 (startswith (name, DOT_DEBUG)
|| startswith (name, DOT_ZDEBUG)
#ifdef _COMMENT
|| strcmp (name, _COMMENT) == 0
#endif
#ifdef COFF_LONG_SECTION_NAMES
|| startswith (name, GNU_LINKONCE_WI)
|| startswith (name, GNU_LINKONCE_WT)
#endif
|| startswith (name, ".stab"))
{
#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 ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
&& (startswith (name, ".sbss")
|| startswith (name, ".sdata")))
sec_flags |= SEC_SMALL_DATA;
#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 (startswith (name, ".gnu.linkonce"))
sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
#endif
if (flags_ptr == NULL)
return false;
* flags_ptr = sec_flags;
return true;
}
#else /* COFF_WITH_PE */
static hashval_t
comdat_hashf (const void *entry)
{
const struct comdat_hash_entry *fe = entry;
return fe->target_index;
}
static int
comdat_eqf (const void *e1, const void *e2)
{
const struct comdat_hash_entry *fe1 = e1;
const struct comdat_hash_entry *fe2 = e2;
return fe1->target_index == fe2->target_index;
}
static void
comdat_delf (void *ent)
{
struct comdat_hash_entry *e = ent;
free (e->comdat_name);
free (e->symname);
free (e);
}
static struct comdat_hash_entry *
find_flags (htab_t comdat_hash, int target_index)
{
struct comdat_hash_entry needle;
needle.target_index = target_index;
return htab_find (comdat_hash, &needle);
}
static bool
fill_comdat_hash (bfd *abfd)
{
bfd_byte *esymstart, *esym, *esymend;
/* 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 true;
esymstart = esym = (bfd_byte *) obj_coff_external_syms (abfd);
esymend = esym + obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
for (struct internal_syment isym;
esym < esymend;
esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd))
{
char buf[SYMNMLEN + 1];
const char *symname;
flagword sec_flags = SEC_LINK_ONCE;
bfd_coff_swap_sym_in (abfd, esym, &isym);
/* 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 $) as the comdat symbol. */
/* All 3 branches use this. */
symname = _bfd_coff_internal_syment_name (abfd, &isym, buf);
/* PR 17512 file: 078-11867-0.004 */
if (symname == NULL)
{
_bfd_error_handler (_("%pB: unable to load COMDAT section name"),
abfd);
continue;
}
union internal_auxent aux;
struct comdat_hash_entry needle;
needle.target_index = isym.n_scnum;
void **slot
= htab_find_slot (pe_data (abfd)->comdat_hash, &needle, INSERT);
if (slot == NULL)
return false;
if (*slot == NULL)
{
if (isym.n_numaux != 1)
aux.x_scn.x_comdat = 0;
else
{
/* PR 17512: file: e2cfe54f. */
if (esym + isym.n_numaux * bfd_coff_symesz (abfd) >= esymend)
{
/* xgettext:c-format */
_bfd_error_handler (_("%pB: warning: no symbol for"
" section '%s' found"),
abfd, symname);
continue;
}
bfd_coff_swap_aux_in (abfd, (esym + bfd_coff_symesz (abfd)),
isym.n_type, isym.n_sclass, 0,
isym.n_numaux, &aux);
}
/* FIXME: Microsoft uses NODUPLICATES and ASSOCIATIVE, but
gnu uses ANY and SAME_SIZE. Unfortunately, gnu doesn't
do the comdat symbols right. So, until we can fix it to
do the right thing, we are temporarily disabling comdats
for the MS types (they're used in DLLs and C++, but we
don't support *their* C++ libraries anyway - DJ. */
/* Cygwin does not follow the MS style, and uses ANY and
SAME_SIZE where NODUPLICATES and ASSOCIATIVE should be
used. For Interix, we just do the right thing up
front. */
switch (aux.x_scn.x_comdat)
{
case IMAGE_COMDAT_SELECT_NODUPLICATES:
#ifdef STRICT_PE_FORMAT
sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
#else
sec_flags &= ~SEC_LINK_ONCE;
#endif
break;
case IMAGE_COMDAT_SELECT_ANY:
sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
break;
case IMAGE_COMDAT_SELECT_SAME_SIZE:
sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
break;
case IMAGE_COMDAT_SELECT_EXACT_MATCH:
/* Not yet fully implemented ??? */
sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
break;
/* debug$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$F gets this case; other implications ??? */
sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
break;
}
*slot = bfd_zmalloc (sizeof (struct comdat_hash_entry));
if (*slot == NULL)
return false;
struct comdat_hash_entry *newentry = *slot;
newentry->sec_flags = sec_flags;
newentry->symname = bfd_strdup (symname);
newentry->target_index = isym.n_scnum;
newentry->isym = isym;
newentry->comdat_symbol = -1;
}
else
{
struct comdat_hash_entry *entry = *slot;
if (entry->comdat_symbol != -1)
continue;
char *target_name = strchr (entry->symname, '$');
if (target_name != NULL)
{
/* Gas mode: the first matching on partial name. */
target_name += 1;
#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 */
continue;
}
}
/* MSVC mode: the lexically second symbol (or drop through
from the above). */
/* This must the second symbol with the section #. It is
the actual symbol name. Intel puts the two adjacent, but
Alpha (at least) spreads them out. */
entry->comdat_symbol = (esym - esymstart) / bfd_coff_symesz (abfd);
entry->comdat_name = bfd_strdup (symname);
}
}
return true;
}
static bool
insert_coff_comdat_info (bfd *abfd, asection *section, const char *symname,
long symbol)
{
struct coff_comdat_info *comdat;
size_t len = strlen (symname) + 1;
comdat = bfd_alloc (abfd, sizeof (*comdat) + len);
if (comdat == NULL)
return false;
coff_section_data (abfd, section)->comdat = comdat;
comdat->symbol = symbol;
char *newname = (char *) (comdat + 1);
comdat->name = newname;
memcpy (newname, symname, len);
return true;
}
static bool
handle_COMDAT (bfd *abfd, flagword *sec_flags, const char *name,
asection *section)
{
if (pe_data (abfd)->comdat_hash == NULL)
{
pe_data (abfd)->comdat_hash = htab_create (10, comdat_hashf, comdat_eqf,
comdat_delf);
if (pe_data (abfd)->comdat_hash == NULL)
return false;
}
if (htab_elements (pe_data (abfd)->comdat_hash) == 0)
if (! fill_comdat_hash (abfd))
return false;
struct comdat_hash_entry *found
= find_flags (pe_data (abfd)->comdat_hash, section->target_index);
if (found != NULL)
{
struct internal_syment isym = found->isym;
/* 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_sclass == C_EXT)
&& BTYPE (isym.n_type) == T_NULL && isym.n_value == 0))
{
/* Malformed input files can trigger this test.
cf PR 21781. */
_bfd_error_handler
(_("%pB: error: unexpected symbol '%s' in COMDAT section"),
abfd, found->symname);
return false;
}
/* 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 (isym.n_sclass == C_STAT && strcmp (name, found->symname) != 0)
/* xgettext:c-format */
_bfd_error_handler (_("%pB: warning: COMDAT symbol '%s'"
" does not match section name '%s'"),
abfd, found->symname, name);
if (found->comdat_symbol != -1)
{
if (! insert_coff_comdat_info (abfd, section, found->comdat_name,
found->comdat_symbol))
return false;
}
*sec_flags = *sec_flags | found->sec_flags;
return true;
}
*sec_flags = *sec_flags | SEC_LINK_ONCE;
return true;
}
/* 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 bool
styp_to_sec_flags (bfd *abfd,
void * hdr,
const char *name,
asection *section,
flagword *flags_ptr)
{
struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
unsigned long styp_flags = internal_s->s_flags;
flagword sec_flags;
bool result = true;
bool is_dbg = false;
if (startswith (name, DOT_DEBUG)
|| startswith (name, DOT_ZDEBUG)
#ifdef COFF_LONG_SECTION_NAMES
|| startswith (name, GNU_LINKONCE_WI)
|| startswith (name, GNU_LINKONCE_WT)
/* FIXME: These definitions ought to be in a header file. */
#define GNU_DEBUGLINK ".gnu_debuglink"
#define GNU_DEBUGALTLINK ".gnu_debugaltlink"
|| startswith (name, GNU_DEBUGLINK)
|| startswith (name, GNU_DEBUGALTLINK)
#endif
|| startswith (name, ".stab"))
is_dbg = true;
/* Assume read only unless IMAGE_SCN_MEM_WRITE is specified. */
sec_flags = SEC_READONLY;
/* If section disallows read, then set the NOREAD flag. */
if ((styp_flags & IMAGE_SCN_MEM_READ) == 0)
sec_flags |= SEC_COFF_NOREAD;
/* Process each flag bit in styp_flags in turn. */
while (styp_flags)
{
unsigned 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:
sec_flags &= ~SEC_COFF_NOREAD;
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:
/* Generate a warning message rather using the 'unhandled'
variable as this will allow some .sys files generate by
other toolchains to be processed. See bugzilla issue 196. */
/* xgettext:c-format */
_bfd_error_handler (_("%pB: warning: ignoring section flag"
" %s in section %s"),
abfd, "IMAGE_SCN_MEM_NOT_PAGED", name);
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:
/* The MS PE spec says that debug sections are DISCARDABLE,
but the presence of a DISCARDABLE flag does not necessarily
mean that a given section contains debug information. Thus
we only set the SEC_DEBUGGING flag on sections that we
recognise as containing debug information. */
if (is_dbg
#ifdef _COMMENT
|| strcmp (name, _COMMENT) == 0
#endif
)
{
sec_flags |= SEC_DEBUGGING | SEC_READONLY;
}
break;
case IMAGE_SCN_MEM_SHARED:
sec_flags |= SEC_COFF_SHARED;
break;
case IMAGE_SCN_LNK_REMOVE:
if (!is_dbg)
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:
if (is_dbg)
sec_flags |= SEC_DEBUGGING;
else
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. */
if (!handle_COMDAT (abfd, &sec_flags, name, section))
result = false;
break;
default:
/* Silently ignore for now. */
break;
}
/* If the section flag was not handled, report it here. */
if (unhandled != NULL)
{
_bfd_error_handler
/* xgettext:c-format */
(_("%pB (%s): section flag %s (%#lx) ignored"),
abfd, name, unhandled, flag);
result = false;
}
}
if ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
&& (startswith (name, ".sbss")
|| startswith (name, ".sdata")))
sec_flags |= SEC_SMALL_DATA;
#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 (startswith (name, ".gnu.linkonce"))
sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
#endif
if (flags_ptr)
* flags_ptr = sec_flags;
return result;
}
#endif /* COFF_WITH_PE */
#define get_index(symbol) ((symbol)->udata.i)
/*
INTERNAL_DEFINITION
bfd_coff_backend_data
INTERNAL
.{* 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
.};
.
.typedef asection * (*coff_gc_mark_hook_fn)
. (asection *, struct bfd_link_info *, struct internal_reloc *,
. struct coff_link_hash_entry *, struct internal_syment *);
.
Special entry points for gdb to swap in coff symbol table parts:
CODE_FRAGMENT
.typedef struct
.{
. void (*_bfd_coff_swap_aux_in)
. (bfd *, void *, int, int, int, int, void *);
.
. void (*_bfd_coff_swap_sym_in)
. (bfd *, void *, void *);
.
. void (*_bfd_coff_swap_lineno_in)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_aux_out)
. (bfd *, void *, int, int, int, int, void *);
.
. unsigned int (*_bfd_coff_swap_sym_out)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_lineno_out)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_reloc_out)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_filehdr_out)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_aouthdr_out)
. (bfd *, void *, void *);
.
. unsigned int (*_bfd_coff_swap_scnhdr_out)
. (bfd *, void *, void *);
.
. 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;
. bool _bfd_coff_long_filenames;
.
. bool _bfd_coff_long_section_names;
. bool (*_bfd_coff_set_long_section_names)
. (bfd *, int);
.
. unsigned int _bfd_coff_default_section_alignment_power;
. bool _bfd_coff_force_symnames_in_strings;
. unsigned int _bfd_coff_debug_string_prefix_length;
. unsigned int _bfd_coff_max_nscns;
.
. void (*_bfd_coff_swap_filehdr_in)
. (bfd *, void *, void *);
.
. void (*_bfd_coff_swap_aouthdr_in)
. (bfd *, void *, void *);
.
. void (*_bfd_coff_swap_scnhdr_in)
. (bfd *, void *, void *);
.
. void (*_bfd_coff_swap_reloc_in)
. (bfd *abfd, void *, void *);
.
. bool (*_bfd_coff_bad_format_hook)
. (bfd *, void *);
.
. bool (*_bfd_coff_set_arch_mach_hook)
. (bfd *, void *);
.
. void * (*_bfd_coff_mkobject_hook)
. (bfd *, void *, void *);
.
. bool (*_bfd_styp_to_sec_flags_hook)
. (bfd *, void *, const char *, asection *, flagword *);
.
. void (*_bfd_set_alignment_hook)
. (bfd *, asection *, void *);
.
. bool (*_bfd_coff_slurp_symbol_table)
. (bfd *);
.
. bool (*_bfd_coff_symname_in_debug)
. (bfd *, struct internal_syment *);
.
. bool (*_bfd_coff_pointerize_aux_hook)
. (bfd *, combined_entry_type *, combined_entry_type *,
. unsigned int, combined_entry_type *);
.
. bool (*_bfd_coff_print_aux)
. (bfd *, FILE *, combined_entry_type *, combined_entry_type *,
. combined_entry_type *, unsigned int);
.
. bool (*_bfd_coff_reloc16_extra_cases)
. (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
. bfd_byte *, size_t *, size_t *);
.
. int (*_bfd_coff_reloc16_estimate)
. (bfd *, asection *, arelent *, unsigned int,
. struct bfd_link_info *);
.
. enum coff_symbol_classification (*_bfd_coff_classify_symbol)
. (bfd *, struct internal_syment *);
.
. bool (*_bfd_coff_compute_section_file_positions)
. (bfd *);
.
. bool (*_bfd_coff_start_final_link)
. (bfd *, struct bfd_link_info *);
.
. bool (*_bfd_coff_relocate_section)
. (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
. struct internal_reloc *, struct internal_syment *, asection **);
.
. reloc_howto_type *(*_bfd_coff_rtype_to_howto)
. (bfd *, asection *, struct internal_reloc *,
. struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *);
.
. bool (*_bfd_coff_adjust_symndx)
. (bfd *, struct bfd_link_info *, bfd *, asection *,
. struct internal_reloc *, bool *);
.
. bool (*_bfd_coff_link_add_one_symbol)
. (struct bfd_link_info *, bfd *, const char *, flagword,
. asection *, bfd_vma, const char *, bool, bool,
. struct bfd_link_hash_entry **);
.
. bool (*_bfd_coff_link_output_has_begun)
. (bfd *, struct coff_final_link_info *);
.
. bool (*_bfd_coff_final_link_postscript)
. (bfd *, struct coff_final_link_info *);
.
. bool (*_bfd_coff_print_pdata)
. (bfd *, void *);
.
.} bfd_coff_backend_data;
.
INTERNAL
.#define coff_backend_info(abfd) \
. ((const 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_data (abfd)->long_section_names)
.#define bfd_coff_set_long_section_names(abfd, enable) \
. ((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
.#define bfd_coff_default_section_alignment_power(abfd) \
. (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
.#define bfd_coff_max_nscns(abfd) \
. (coff_backend_info (abfd)->_bfd_coff_max_nscns)
.
.#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, flags_ptr)\
. ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\
. (abfd, scnhdr, name, section, flags_ptr))
.
.#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))
.
.#define bfd_coff_have_print_pdata(a) \
. (coff_backend_info (a)->_bfd_coff_print_pdata)
.#define bfd_coff_print_pdata(a,p) \
. ((coff_backend_info (a)->_bfd_coff_print_pdata) (a, p))
.
.{* Macro: Returns true if the bfd is a PE executable as opposed to a
. PE object file. *}
.#define bfd_pei_p(abfd) \
. (startswith ((abfd)->xvec->name, "pei-"))
*/
/* See whether the magic number matches. */
static bool
coff_bad_format_hook (bfd * abfd ATTRIBUTE_UNUSED, void * filehdr)
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
if (BADMAG (*internal_f))
return false;
return true;
}
#ifdef TICOFF
static bool
ticoff0_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr)
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
if (COFF0_BADMAG (*internal_f))
return false;
return true;
}
#endif
#ifdef TICOFF
static bool
ticoff1_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr)
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
if (COFF1_BADMAG (*internal_f))
return false;
return true;
}
#endif
/* Check whether this section uses an alignment other than the
default. */
static void
coff_set_custom_section_alignment (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_section_name (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
#if COFF_DEFAULT_SECTION_ALIGNMENT_POWER != 0
&& default_alignment > alignment_table[i].default_alignment_max
#endif
)
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 bool
coff_new_section_hook (bfd * abfd, asection * section)
{
combined_entry_type *native;
size_t amt;
unsigned char sclass = C_STAT;
section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
#ifdef RS6000COFF_C
if (bfd_xcoff_text_align_power (abfd) != 0
&& strcmp (bfd_section_name (section), ".text") == 0)
section->alignment_power = bfd_xcoff_text_align_power (abfd);
else if (bfd_xcoff_data_align_power (abfd) != 0
&& strcmp (bfd_section_name (section), ".data") == 0)
section->alignment_power = bfd_xcoff_data_align_power (abfd);
else
{
int i;
for (i = 0; i < XCOFF_DWSECT_NBR_NAMES; i++)
if (strcmp (bfd_section_name (section),
xcoff_dwsect_names[i].xcoff_name) == 0)
{
section->alignment_power = 0;
sclass = C_DWARF;
break;
}
}
#endif
/* Set up the section symbol. */
if (!_bfd_generic_new_section_hook (abfd, section))
return false;
/* 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). */
amt = sizeof (combined_entry_type) * 10;
native = (combined_entry_type *) bfd_zalloc (abfd, amt);
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 overridden 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->is_sym = true;
native->u.syment.n_type = T_NULL;
native->u.syment.n_sclass = sclass;
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 (bfd * abfd ATTRIBUTE_UNUSED,
asection * section,
void * scnhdr)
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
unsigned int i;
#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
static void
coff_set_alignment_hook (bfd * abfd ATTRIBUTE_UNUSED,
asection * section,
void * scnhdr)
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
size_t amt;
unsigned int alignment_power_const
= hdr->s_flags & IMAGE_SCN_ALIGN_POWER_BIT_MASK;
switch (alignment_power_const)
{
case IMAGE_SCN_ALIGN_8192BYTES:
case IMAGE_SCN_ALIGN_4096BYTES:
case IMAGE_SCN_ALIGN_2048BYTES:
case IMAGE_SCN_ALIGN_1024BYTES:
case IMAGE_SCN_ALIGN_512BYTES:
case IMAGE_SCN_ALIGN_256BYTES:
case IMAGE_SCN_ALIGN_128BYTES:
case IMAGE_SCN_ALIGN_64BYTES:
case IMAGE_SCN_ALIGN_32BYTES:
case IMAGE_SCN_ALIGN_16BYTES:
case IMAGE_SCN_ALIGN_8BYTES:
case IMAGE_SCN_ALIGN_4BYTES:
case IMAGE_SCN_ALIGN_2BYTES:
case IMAGE_SCN_ALIGN_1BYTES:
section->alignment_power
= IMAGE_SCN_ALIGN_POWER_NUM (alignment_power_const);
break;
default:
break;
}
/* 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)
{
amt = sizeof (struct coff_section_tdata);
section->used_by_bfd = bfd_zalloc (abfd, amt);
if (section->used_by_bfd == NULL)
/* FIXME: Return error. */
abort ();
}
if (pei_section_data (abfd, section) == NULL)
{
amt = sizeof (struct pei_section_tdata);
coff_section_data (abfd, section)->tdata = bfd_zalloc (abfd, amt);
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;
file_ptr oldpos = bfd_tell (abfd);
bfd_size_type relsz = bfd_coff_relsz (abfd);
if (bfd_seek (abfd, hdr->s_relptr, 0) != 0)
return;
if (bfd_read (& dst, relsz, abfd) != relsz)
return;
bfd_coff_swap_reloc_in (abfd, &dst, &n);
if (bfd_seek (abfd, oldpos, 0) != 0)
return;
if (n.r_vaddr < 0x10000)
{
_bfd_error_handler (_("%pB: overflow reloc count too small"), abfd);
bfd_set_error (bfd_error_bad_value);
return;
}
section->reloc_count = hdr->s_nreloc = n.r_vaddr - 1;
section->rel_filepos += relsz;
}
else if (hdr->s_nreloc == 0xffff)
_bfd_error_handler
(_("%pB: warning: claims to have 0xffff relocs, without overflow"),
abfd);
}
#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 (bfd *abfd, asection *section, void * scnhdr)
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
asection *real_sec;
if ((hdr->s_flags & STYP_OVRFLO) == 0)
return;
real_sec = coff_section_from_bfd_index (abfd, (int) hdr->s_nreloc);
if (real_sec == NULL)
return;
real_sec->reloc_count = hdr->s_paddr;
real_sec->lineno_count = hdr->s_vaddr;
if (!bfd_section_removed_from_list (abfd, section))
{
bfd_section_list_remove (abfd, section);
--abfd->section_count;
}
}
#else /* ! RS6000COFF_C */
#if defined (COFF_GO32_EXE) || defined (COFF_GO32)
static void
coff_set_alignment_hook (bfd * abfd, asection * section, void * scnhdr)
{
struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
/* Check for extended relocs. */
if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL)
{
struct external_reloc dst;
struct internal_reloc n;
const file_ptr oldpos = bfd_tell (abfd);
const bfd_size_type relsz = bfd_coff_relsz (abfd);
if (bfd_seek (abfd, hdr->s_relptr, 0) != 0)
return;
if (bfd_read (& dst, relsz, abfd) != relsz)
return;
bfd_coff_swap_reloc_in (abfd, &dst, &n);
if (bfd_seek (abfd, oldpos, 0) != 0)
return;
section->reloc_count = hdr->s_nreloc = n.r_vaddr - 1;
section->rel_filepos += relsz;
}
else if (hdr->s_nreloc == 0xffff)
_bfd_error_handler
(_("%pB: warning: claims to have 0xffff relocs, without overflow"),
abfd);
}
#else /* ! COFF_GO32_EXE && ! COFF_GO32 */
static void
coff_set_alignment_hook (bfd *abfd ATTRIBUTE_UNUSED,
asection *section ATTRIBUTE_UNUSED,
void *scnhdr ATTRIBUTE_UNUSED)
{
}
#endif /* ! COFF_GO32_EXE && ! COFF_GO32 */
#endif /* ! RS6000COFF_C */
#endif /* ! COFF_WITH_PE */
#endif /* ! COFF_ALIGN_IN_SECTION_HEADER */
#ifndef coff_mkobject
static bool
coff_mkobject (bfd * abfd)
{
coff_data_type *coff;
size_t amt = sizeof (coff_data_type);
abfd->tdata.coff_obj_data = bfd_zalloc (abfd, amt);
if (abfd->tdata.coff_obj_data == NULL)
return false;
coff = coff_data (abfd);
coff->symbols = NULL;
coff->conversion_table = NULL;
coff->raw_syments = NULL;
coff->relocbase = 0;
coff->local_toc_sym_map = 0;
bfd_coff_long_section_names (abfd)
= coff_backend_info (abfd)->_bfd_coff_long_section_names;
/* make_abs_section(abfd);*/
return true;
}
#endif
/* Create the COFF backend specific information. */
#ifndef coff_mkobject_hook
static void *
coff_mkobject_hook (bfd * abfd,
void * filehdr,
void * aouthdr ATTRIBUTE_UNUSED)
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
coff_data_type *coff;
if (! coff_mkobject (abfd))
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;
bfd_xcoff_text_align_power (abfd) = internal_a->o_algntext;
bfd_xcoff_data_align_power (abfd) = 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 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 bool
coff_set_arch_mach_hook (bfd *abfd, void * filehdr)
{
unsigned long machine;
enum bfd_architecture arch;
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
/* Zero selects the default machine for an arch. */
machine = 0;
switch (internal_f->f_magic)
{
#ifdef I386MAGIC
case I386MAGIC:
case I386PTXMAGIC:
case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler. */
case LYNXCOFFMAGIC:
case I386_APPLE_MAGIC:
case I386_FREEBSD_MAGIC:
case I386_LINUX_MAGIC:
case I386_NETBSD_MAGIC:
arch = bfd_arch_i386;
break;
#endif
#ifdef AMD64MAGIC
case AMD64MAGIC:
case AMD64_APPLE_MAGIC:
case AMD64_FREEBSD_MAGIC:
case AMD64_LINUX_MAGIC:
case AMD64_NETBSD_MAGIC:
arch = bfd_arch_i386;
machine = bfd_mach_x86_64;
break;
#endif
#ifdef IA64MAGIC
case IA64MAGIC:
arch = bfd_arch_ia64;
break;
#endif
#ifdef ARMMAGIC
case ARMMAGIC:
case ARMPEMAGIC:
case THUMBPEMAGIC:
arch = bfd_arch_arm;
machine = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
if (machine == bfd_mach_arm_unknown)
{
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;
/* The COFF header does not have enough bits available
to cover all the different ARM architectures. So
we interpret F_ARM_5, the highest flag value to mean
"the highest ARM architecture known to BFD" which is
currently the XScale. */
case F_ARM_5: machine = bfd_mach_arm_XScale; break;
}
}
break;
#endif
#ifdef AARCH64MAGIC
case AARCH64MAGIC:
arch = bfd_arch_aarch64;
machine = internal_f->f_flags & F_AARCH64_ARCHITECTURE_MASK;
break;
#endif
#ifdef LOONGARCH64MAGIC
case LOONGARCH64MAGIC:
arch = bfd_arch_loongarch;
machine = internal_f->f_flags & F_LOONGARCH64_ARCHITECTURE_MASK;
break;
#endif
#ifdef RISCV64MAGIC
case RISCV64MAGIC:
arch = bfd_arch_riscv;
machine = bfd_mach_riscv64;
break;
#endif
#ifdef Z80MAGIC
case Z80MAGIC:
arch = bfd_arch_z80;
switch (internal_f->f_flags & F_MACHMASK)
{
case bfd_mach_z80strict << 12:
case bfd_mach_z80 << 12:
case bfd_mach_z80n << 12:
case bfd_mach_z80full << 12:
case bfd_mach_r800 << 12:
case bfd_mach_gbz80 << 12:
case bfd_mach_z180 << 12:
case bfd_mach_ez80_z80 << 12:
case bfd_mach_ez80_adl << 12:
machine = ((unsigned)internal_f->f_flags & F_MACHMASK) >> 12;
break;
default:
return false;
}
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 RS6000COFF_C
#ifdef XCOFF64
case U64_TOCMAGIC:
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;
bfd_size_type amt = bfd_coff_symesz (abfd);
if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
return false;
buf = _bfd_malloc_and_read (abfd, amt, amt);
if (buf == NULL)
return false;
bfd_coff_swap_sym_in (abfd, buf, & 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:
arch = bfd_xcoff_architecture (abfd);
machine = bfd_xcoff_machine (abfd);
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 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;
break;
#endif
#ifdef MIPS_ARCH_MAGIC_WINCE
case MIPS_ARCH_MAGIC_WINCE:
arch = bfd_arch_mips;
break;
#endif
#ifdef SPARCMAGIC
case SPARCMAGIC:
#ifdef LYNXCOFFMAGIC
case LYNXCOFFMAGIC:
#endif
arch = bfd_arch_sparc;
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;
machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags);
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;
machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags);
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 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;
}
static bool
symname_in_debug_hook (bfd *abfd ATTRIBUTE_UNUSED,
struct internal_syment *sym ATTRIBUTE_UNUSED)
{
#ifdef SYMNAME_IN_DEBUG
return SYMNAME_IN_DEBUG (sym) != 0;
#else
return false;
#endif
}
#ifdef RS6000COFF_C
#ifdef XCOFF64
#define FORCE_SYMNAMES_IN_STRINGS
#endif
/* Handle the csect auxent of a C_EXT, C_AIX_WEAKEXT or C_HIDEXT symbol. */
static bool
coff_pointerize_aux_hook (bfd *abfd ATTRIBUTE_UNUSED,
combined_entry_type *table_base,
combined_entry_type *symbol,
unsigned int indaux,
combined_entry_type *aux)
{
BFD_ASSERT (symbol->is_sym);
int n_sclass = symbol->u.syment.n_sclass;
if (CSECT_SYM_P (n_sclass)
&& indaux + 1 == symbol->u.syment.n_numaux)
{
BFD_ASSERT (! aux->is_sym);
if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD
&& aux->u.auxent.x_csect.x_scnlen.u64 < obj_raw_syment_count (abfd))
{
aux->u.auxent.x_csect.x_scnlen.p =
table_base + aux->u.auxent.x_csect.x_scnlen.u64;
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
#define coff_pointerize_aux_hook 0
#endif /* ! RS6000COFF_C */
/* Print an aux entry. This returns TRUE if it has printed it. */
static bool
coff_print_aux (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)
{
BFD_ASSERT (symbol->is_sym);
BFD_ASSERT (! aux->is_sym);
#ifdef RS6000COFF_C
if (CSECT_SYM_P (symbol->u.syment.n_sclass)
&& 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 %5" PRIu64,
aux->u.auxent.x_csect.x_scnlen.u64);
}
else
{
fprintf (file, "indx ");
if (! aux->fix_scnlen)
fprintf (file, "%4" PRIu64,
aux->u.auxent.x_csect.x_scnlen.u64);
else
fprintf (file, "%4ld",
(long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
}
fprintf (file,
" prmhsh %u snhsh %u typ %d algn %d clss %u stb %u 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
/* AUX's ld wants relocations to be sorted. */
static int
compare_arelent_ptr (const void * x, const void * 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 bool
coff_write_relocs (bfd * abfd, int first_undef)
{
asection *s;
for (s = abfd->sections; s != 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. */
bfd_size_type amt;
amt = s->reloc_count;
amt *= sizeof (arelent *);
p = bfd_malloc (amt);
if (p == NULL)
{
if (s->reloc_count > 0)
return false;
}
else
{
memcpy (p, s->orelocation, (size_t) amt);
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_EXTENDED_RELOC_COUNTER
if ((obj_pe (abfd) || obj_go32 (abfd)) && s->reloc_count >= 0xffff)
{
/* Encode real count here as first reloc. */
struct internal_reloc n;
memset (& 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 (&dst, 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 (& 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] != NULL && q->sym_ptr_ptr[0]->the_bfd != abfd)
{
int j;
const char *sname = q->sym_ptr_ptr[0]->name;
asymbol **outsyms = abfd->outsymbols;
for (j = first_undef; outsyms[j]; j++)
{
const char *intable = outsyms[j]->name;
if (strcmp (intable, sname) == 0)
{
/* Got a hit, so repoint the reloc. */
q->sym_ptr_ptr = outsyms + j;
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 && q->sym_ptr_ptr[0] != NULL)
{
#ifdef SECTION_RELATIVE_ABSOLUTE_SYMBOL_P
if (SECTION_RELATIVE_ABSOLUTE_SYMBOL_P (q, s))
#else
if ((*q->sym_ptr_ptr)->section == bfd_abs_section_ptr
&& ((*q->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0)
#endif
/* This is a relocation relative to the absolute symbol. */
n.r_symndx = -1;
else
{
n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
/* Check to see if the symbol reloc points to a symbol
we don't have in our symbol table. */
if (n.r_symndx > obj_conv_table_size (abfd))
{
bfd_set_error (bfd_error_bad_value);
/* xgettext:c-format */
_bfd_error_handler (_("%pB: reloc against a non-existent"
" symbol index: %ld"),
abfd, n.r_symndx);
return false;
}
}
}
#ifdef SWAP_OUT_RELOC_OFFSET
n.r_offset = q->addend;
#endif
#ifdef SELECT_RELOC
/* Work out reloc type from what is required. */
if (q->howto)
SELECT_RELOC (n, q->howto);
#else
if (q->howto)
n.r_type = q->howto->type;
#endif
coff_swap_reloc_out (abfd, &n, &dst);
if (bfd_write (&dst, bfd_coff_relsz (abfd), abfd)
!= bfd_coff_relsz (abfd))
return false;
}
#ifdef TARG_AUX
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 bool
coff_set_flags (bfd * abfd,
unsigned int *magicp ATTRIBUTE_UNUSED,
unsigned short *flagsp ATTRIBUTE_UNUSED)
{
switch (bfd_get_arch (abfd))
{
#ifdef Z80MAGIC
case bfd_arch_z80:
*magicp = Z80MAGIC;
switch (bfd_get_mach (abfd))
{
case bfd_mach_z80strict:
case bfd_mach_z80:
case bfd_mach_z80n:
case bfd_mach_z80full:
case bfd_mach_r800:
case bfd_mach_gbz80:
case bfd_mach_z180:
case bfd_mach_ez80_z80:
case bfd_mach_ez80_adl:
*flagsp = bfd_get_mach (abfd) << 12;
break;
default:
return false;
}
return true;
#endif
#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 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;
}
}
TICOFF_TARGET_MACHINE_SET (flagsp, bfd_get_mach (abfd));
return true;
#endif
#ifdef AARCH64MAGIC
case bfd_arch_aarch64:
* magicp = AARCH64MAGIC;
return true;
#endif
#ifdef LOONGARCH64MAGIC
case bfd_arch_loongarch:
* magicp = LOONGARCH64MAGIC;
return true;
#endif
#ifdef RISCV64MAGIC
case bfd_arch_riscv:
* magicp = RISCV64MAGIC;
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.
See also the comment in coff_set_arch_mach_hook(). */
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
#if defined(I386MAGIC) || defined(AMD64MAGIC)
case bfd_arch_i386:
#if defined(I386MAGIC)
*magicp = I386MAGIC;
#endif
#if defined LYNXOS
/* Just overwrite the usual value if we're doing Lynx. */
*magicp = LYNXCOFFMAGIC;
#endif
#if defined AMD64MAGIC
*magicp = AMD64MAGIC;
#endif
return true;
#endif
#ifdef IA64MAGIC
case bfd_arch_ia64:
*magicp = IA64MAGIC;
return true;
#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;
#endif
#ifdef MIPS_ARCH_MAGIC_WINCE
case bfd_arch_mips:
*magicp = MIPS_ARCH_MAGIC_WINCE;
return true;
#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;
#endif
#ifdef RS6000COFF_C
case bfd_arch_rs6000:
case bfd_arch_powerpc:
BFD_ASSERT (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour);
*magicp = bfd_xcoff_magic_number (abfd);
return true;
#endif
#ifdef MCOREMAGIC
case bfd_arch_mcore:
* magicp = MCOREMAGIC;
return true;
#endif
default: /* Unknown architecture. */
break;
}
return false;
}
static bool
coff_set_arch_mach (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))
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 (const void * arg1, const void * 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;
return 0;
}
#endif /* COFF_IMAGE_WITH_PE */
/* Calculate the file position for each section. */
#define ALIGN_SECTIONS_IN_FILE
#ifdef TICOFF
#undef ALIGN_SECTIONS_IN_FILE
#endif
static bool
coff_compute_section_file_positions (bfd * abfd)
{
asection *current;
file_ptr sofar = bfd_coff_filhsz (abfd);
bool align_adjust;
unsigned int target_index;
#ifdef ALIGN_SECTIONS_IN_FILE
asection *previous = NULL;
file_ptr old_sofar;
#endif
#ifdef COFF_IMAGE_WITH_PE
unsigned int page_size;
if (coff_data (abfd)->link_info
|| (pe_data (abfd) && pe_data (abfd)->pe_opthdr.FileAlignment))
{
page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
/* If no file alignment has been set, default to one.
This repairs 'ld -r' for arm-wince-pe target. */
if (page_size == 0)
page_size = 1;
}
else
page_size = PE_DEF_FILE_ALIGNMENT;
#else
#ifdef COFF_PAGE_SIZE
unsigned int page_size = COFF_PAGE_SIZE;
#endif
#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 (*symp);
if (cf != NULL
&& cf->native != NULL
&& cf->native->is_sym
&& 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, DOT_DEBUG);
if (dsec == NULL)
abort ();
dsec->size = sz;
dsec->flags |= SEC_HAS_CONTENTS;
}
}
#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
if (coff_data (abfd)->section_by_target_index)
htab_empty (coff_data (abfd)->section_by_target_index);
#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. */
unsigned int count;
asection **section_list;
unsigned int i;
bfd_size_type amt;
#ifdef COFF_PAGE_SIZE
/* Clear D_PAGED if section / file alignment aren't suitable for
paging at COFF_PAGE_SIZE granularity. */
if (pe_data (abfd)->pe_opthdr.SectionAlignment < COFF_PAGE_SIZE
|| page_size < COFF_PAGE_SIZE)
abfd->flags &= ~D_PAGED;
#endif
count = 0;
for (current = abfd->sections; current != NULL; current = current->next)
++count;
/* We allocate an extra cell to simplify the final loop. */
amt = sizeof (struct asection *) * (count + 1);
section_list = (asection **) bfd_malloc (amt);
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 = NULL;
abfd->section_last = NULL;
for (i = 0; i < count; i++)
{
current = section_list[i];
bfd_section_list_append (abfd, current);
/* 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->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. */
target_index = 1;
for (current = abfd->sections; current != NULL; current = current->next)
current->target_index = target_index++;
}
#endif /* ! COFF_IMAGE_WITH_PE */
if (target_index >= bfd_coff_max_nscns (abfd))
{
bfd_set_error (bfd_error_file_too_big);
_bfd_error_handler
/* xgettext:c-format */
(_("%pB: too many sections (%d)"), abfd, target_index);
return false;
}
align_adjust = false;
for (current = abfd->sections;
current != 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)
{
size_t amt = sizeof (struct coff_section_tdata);
current->used_by_bfd = bfd_zalloc (abfd, amt);
if (current->used_by_bfd == NULL)
return false;
}
if (pei_section_data (abfd, current) == NULL)
{
size_t amt = sizeof (struct pei_section_tdata);
coff_section_data (abfd, current)->tdata = bfd_zalloc (abfd, amt);
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->size;
#endif
/* Only deal with sections which have contents. */
if (!(current->flags & SEC_HAS_CONTENTS))
continue;
current->rawsize = current->size;
#ifdef COFF_IMAGE_WITH_PE
/* Make sure we skip empty sections in a PE image. */
if (current->size == 0)
continue;
#endif
/* Align the sections in the file to the same boundary on
which they are aligned in virtual memory. */
#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;
#ifdef COFF_IMAGE_WITH_PE
sofar = BFD_ALIGN (sofar, page_size);
#else
sofar = BFD_ALIGN (sofar, (bfd_vma) 1 << current->alignment_power);
#endif
#ifdef RS6000COFF_C
/* Make sure the file offset and the vma of .text/.data are at the
same page offset, so that the file can be mmap'ed without being
relocated. Failing that, AIX is able to load and execute the
program, but it will be silently relocated (possible as
executables are PIE). But the relocation is slightly costly and
complexify the use of addr2line or gdb. So better to avoid it,
like does the native linker. Usually gnu ld makes sure that
the vma of .text is the file offset so this issue shouldn't
appear unless you are stripping such an executable.
AIX loader checks the text section alignment of (vma - filepos),
and the native linker doesn't try to align the text sections.
For example:
0 .text 000054cc 10000128 10000128 00000128 2**5
CONTENTS, ALLOC, LOAD, CODE
Don't perform the above tweak if the previous one is .tdata,
as it will increase the memory allocated for every threads
created and not just improve performances with gdb.
*/
if ((current->flags & SEC_LOAD) != 0
&& (!strcmp (current->name, _TEXT)
|| !strcmp (current->name, _DATA))
&& (previous == NULL || strcmp(previous->name, _TDATA)))
{
bfd_vma align = 4096;
bfd_vma sofar_off = sofar % align;
bfd_vma vma_off = current->vma % align;
if (vma_off > sofar_off)
sofar += vma_off - sofar_off;
else if (vma_off < sofar_off)
sofar += align + vma_off - sofar_off;
}
#endif
if (previous != NULL
&& (previous->flags & SEC_LOAD) != 0)
previous->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 - (bfd_vma) sofar) % page_size;
#endif
current->filepos = sofar;
#ifdef COFF_IMAGE_WITH_PE
/* Set the padded size. */
current->size = (current->size + page_size - 1) & -page_size;
#endif
sofar += current->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->size;
current->size = BFD_ALIGN (current->size,
(bfd_vma) 1 << current->alignment_power);
align_adjust = current->size != old_size;
sofar += current->size - old_size;
}
else
{
old_sofar = sofar;
#ifdef COFF_IMAGE_WITH_PE
sofar = BFD_ALIGN (sofar, page_size);
#else
sofar = BFD_ALIGN (sofar, (bfd_vma) 1 << current->alignment_power);
#endif
align_adjust = sofar != old_sofar;
current->size += sofar - old_sofar;
}
#endif
#ifdef COFF_IMAGE_WITH_PE
/* For PE we need to make sure we pad out to the aligned
size, in case the caller only writes out data to the
unaligned size. */
if (pei_section_data (abfd, current)->virt_size < current->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 (current, 0);
#endif
#ifdef ALIGN_SECTIONS_IN_FILE
previous = current;
#endif
}
/* 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, 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,
(bfd_vma) 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER);
obj_relocbase (abfd) = sofar;
abfd->output_has_begun = true;
return true;
}
#ifdef COFF_IMAGE_WITH_PE
static bool
coff_read_word (bfd *abfd, unsigned int *value, unsigned int *pelength)
{
unsigned char b[2];
int status;
status = bfd_read (b, 2, abfd);
if (status < 1)
{
*value = 0;
return false;
}
if (status == 1)
*value = (unsigned int) b[0];
else
*value = (unsigned int) (b[0] + (b[1] << 8));
*pelength += status;
return true;
}
/* Read a two byte number from buffer B returning the result in VALUE.
No more than BUF_SIZE bytes will be read.
Returns true upobn success, false otherwise.
If successful, increases the value stored in PELENGTH by the number
of bytes read. */
static bool
coff_read_word_from_buffer (unsigned char * b,
int buf_size,
unsigned int * value,
unsigned int * pelength)
{
if (buf_size < 1)
{
*value = 0;
return false;
}
if (buf_size == 1)