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1999-08-08 Mark Elbrecht <snowball3@bigfoot.com>

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* libcoff-in.h (struct coff_section_alignment_entry): Define.
	* coffcode.h (coff_set_custom_section_alignment): New static
	function.
	(coff_section_alignment_table): New static array.
	(coff_new_section_hook): Use coff_set_customer_section_alignment.
	* coff-go32.c (COFF_SECTION_ALIGNMENT_ENTRIES): Define.
	* coff-stgo32.c (COFF_SECTION_ALIGNMENT_ENTRIES): Define.
	* libcoff.h: Rebuild.
This commit is contained in:
Ian Lance Taylor 1999-08-09 02:56:16 +00:00
parent dc8bc5a62a
commit 5dccc1ddaa
6 changed files with 171 additions and 24 deletions
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11
bfd/ChangeLog
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@ -1,3 +1,14 @@
1999-08-08 Mark Elbrecht <snowball3@bigfoot.com>
* libcoff-in.h (struct coff_section_alignment_entry): Define.
* coffcode.h (coff_set_custom_section_alignment): New static
function.
(coff_section_alignment_table): New static array.
(coff_new_section_hook): Use coff_set_customer_section_alignment.
* coff-go32.c (COFF_SECTION_ALIGNMENT_ENTRIES): Define.
* coff-stgo32.c (COFF_SECTION_ALIGNMENT_ENTRIES): Define.
* libcoff.h: Rebuild.
1999-08-08 Ian Lance Taylor <ian@zembu.com> 1999-08-08 Ian Lance Taylor <ian@zembu.com>
* Makefile.am: Rename .dep* files to DEP*. Change DEP variable to * Makefile.am: Rename .dep* files to DEP*. Change DEP variable to

12
bfd/coff-go32.c
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@ -24,4 +24,16 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define COFF_LONG_SECTION_NAMES #define COFF_LONG_SECTION_NAMES
#define COFF_SUPPORT_GNU_LINKONCE #define COFF_SUPPORT_GNU_LINKONCE
#define COFF_SECTION_ALIGNMENT_ENTRIES \
{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.d"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.t"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
{ COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.r"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }
#include "coff-i386.c" #include "coff-i386.c"

6
bfd/coff-stgo32.c
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@ -42,6 +42,12 @@
#define COFF_LONG_SECTION_NAMES #define COFF_LONG_SECTION_NAMES
#define COFF_SUPPORT_GNU_LINKONCE #define COFF_SUPPORT_GNU_LINKONCE
#define COFF_SECTION_ALIGNMENT_ENTRIES \
{ COFF_SECTION_NAME_EXACT_MATCH (".data"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
{ COFF_SECTION_NAME_EXACT_MATCH (".text"), \
COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }
#include "bfd.h" #include "bfd.h"
/* At first the prototypes */ /* At first the prototypes */

92
bfd/coffcode.h
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@ -315,6 +315,9 @@ CODE_FRAGMENT
static long sec_to_styp_flags PARAMS ((const char *, flagword)); static long sec_to_styp_flags PARAMS ((const char *, flagword));
static flagword styp_to_sec_flags PARAMS ((bfd *, PTR, const char *)); static flagword styp_to_sec_flags PARAMS ((bfd *, PTR, const char *));
static boolean coff_bad_format_hook PARAMS ((bfd *, PTR)); static boolean coff_bad_format_hook PARAMS ((bfd *, PTR));
static void coff_set_custom_section_alignment
PARAMS ((bfd *, asection *, const struct coff_section_alignment_entry *,
unsigned int));
static boolean coff_new_section_hook PARAMS ((bfd *, asection *)); static boolean coff_new_section_hook PARAMS ((bfd *, asection *));
static boolean coff_set_arch_mach_hook PARAMS ((bfd *, PTR)); static boolean coff_set_arch_mach_hook PARAMS ((bfd *, PTR));
static boolean coff_write_relocs PARAMS ((bfd *, int)); static boolean coff_write_relocs PARAMS ((bfd *, int));
@ -1076,15 +1079,73 @@ coff_bad_format_hook (abfd, filehdr)
return true; return true;
} }
/* /* Check whether this section uses an alignment other than the
initialize a section structure with information peculiar to this default. */
particular implementation of coff
*/ static void
coff_set_custom_section_alignment (abfd, section, alignment_table, table_size)
bfd *abfd ATTRIBUTE_UNUSED;
asection *section;
const struct coff_section_alignment_entry *alignment_table;
const unsigned int table_size;
{
const unsigned int default_alignment = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
unsigned int i;
for (i = 0; i < table_size; ++i)
{
const char *secname = bfd_get_section_name (abfd, section);
if (alignment_table[i].comparison_length == (unsigned int) -1
? strcmp (alignment_table[i].name, secname) == 0
: strncmp (alignment_table[i].name, secname,
alignment_table[i].comparison_length) == 0)
break;
}
if (i >= table_size)
return;
if (alignment_table[i].default_alignment_min != COFF_ALIGNMENT_FIELD_EMPTY
&& default_alignment < alignment_table[i].default_alignment_min)
return;
if (alignment_table[i].default_alignment_max != COFF_ALIGNMENT_FIELD_EMPTY
&& default_alignment > alignment_table[i].default_alignment_max)
return;
section->alignment_power = alignment_table[i].alignment_power;
}
/* Custom section alignment records. */
static const struct coff_section_alignment_entry
coff_section_alignment_table[] =
{
#ifdef COFF_SECTION_ALIGNMENT_ENTRIES
COFF_SECTION_ALIGNMENT_ENTRIES,
#endif
/* There must not be any gaps between .stabstr sections. */
{ COFF_SECTION_NAME_PARTIAL_MATCH (".stabstr"),
1, COFF_ALIGNMENT_FIELD_EMPTY, 0 },
/* The .stab section must be aligned to 2**2 at most, to avoid gaps. */
{ COFF_SECTION_NAME_PARTIAL_MATCH (".stab"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
/* Similarly for the .ctors and .dtors sections. */
{ COFF_SECTION_NAME_EXACT_MATCH (".ctors"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
{ COFF_SECTION_NAME_EXACT_MATCH (".dtors"),
3, COFF_ALIGNMENT_FIELD_EMPTY, 2 }
};
static const unsigned int coff_section_alignment_table_size =
sizeof coff_section_alignment_table / sizeof coff_section_alignment_table[0];
/* Initialize a section structure with information peculiar to this
particular implementation of COFF. */
static boolean static boolean
coff_new_section_hook (abfd, section) coff_new_section_hook (abfd, section)
bfd * abfd; bfd *abfd;
asection * section; asection *section;
{ {
combined_entry_type *native; combined_entry_type *native;
@ -1120,22 +1181,9 @@ coff_new_section_hook (abfd, section)
coffsymbol (section->symbol)->native = native; coffsymbol (section->symbol)->native = native;
/* The .stab section must be aligned to 2**2 at most, because coff_set_custom_section_alignment (abfd, section,
otherwise there may be gaps in the section which gdb will not coff_section_alignment_table,
know how to interpret. Examining the section name is a hack, but coff_section_alignment_table_size);
that is also how gdb locates the section.
We need to handle the .ctors and .dtors sections similarly, to
avoid introducing null words in the tables. */
if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2
&& (strncmp (section->name, ".stab", 5) == 0
|| strcmp (section->name, ".ctors") == 0
|| strcmp (section->name, ".dtors") == 0))
section->alignment_power = 2;
/* Similarly, the .stabstr section must be aligned to 2**0 at most. */
if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 0
&& strncmp (section->name, ".stabstr", 8) == 0)
section->alignment_power = 0;
return true; return true;
} }

37
bfd/libcoff-in.h
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@ -1,5 +1,5 @@
/* BFD COFF object file private structure. /* BFD COFF object file private structure.
Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 1998 Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
Free Software Foundation, Inc. Free Software Foundation, Inc.
Written by Cygnus Support. Written by Cygnus Support.
@ -467,6 +467,41 @@ struct coff_final_link_info
struct internal_reloc *internal_relocs; struct internal_reloc *internal_relocs;
}; };
/* Most COFF variants have no way to record the alignment of a
section. This struct is used to set a specific alignment based on
the name of the section. */
struct coff_section_alignment_entry
{
/* The section name. */
const char *name;
/* This is either (unsigned int) -1, indicating that the section
name must match exactly, or it is the number of letters which
must match at the start of the name. */
unsigned int comparison_length;
/* These macros may be used to fill in the first two fields in a
structure initialization. */
#define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
#define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
/* Only use this entry if the default section alignment for this
target is at least that much (as a power of two). If this field
is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_min;
/* Only use this entry if the default section alignment for this
target is no greater than this (as a power of two). If this
field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_max;
#define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
/* The desired alignment for this section (as a power of two). */
unsigned int alignment_power;
};
extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
extern boolean _bfd_coff_link_hash_table_init extern boolean _bfd_coff_link_hash_table_init

37
bfd/libcoff.h
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@ -1,5 +1,5 @@
/* BFD COFF object file private structure. /* BFD COFF object file private structure.
Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 1998 Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
Free Software Foundation, Inc. Free Software Foundation, Inc.
Written by Cygnus Support. Written by Cygnus Support.
@ -467,6 +467,41 @@ struct coff_final_link_info
struct internal_reloc *internal_relocs; struct internal_reloc *internal_relocs;
}; };
/* Most COFF variants have no way to record the alignment of a
section. This struct is used to set a specific alignment based on
the name of the section. */
struct coff_section_alignment_entry
{
/* The section name. */
const char *name;
/* This is either (unsigned int) -1, indicating that the section
name must match exactly, or it is the number of letters which
must match at the start of the name. */
unsigned int comparison_length;
/* These macros may be used to fill in the first two fields in a
structure initialization. */
#define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
#define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
/* Only use this entry if the default section alignment for this
target is at least that much (as a power of two). If this field
is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_min;
/* Only use this entry if the default section alignment for this
target is no greater than this (as a power of two). If this
field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
unsigned int default_alignment_max;
#define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
/* The desired alignment for this section (as a power of two). */
unsigned int alignment_power;
};
extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
extern boolean _bfd_coff_link_hash_table_init extern boolean _bfd_coff_link_hash_table_init