blob: 4bb625a03959e2f92391ed421d979af0d7a51e8e [file] [log] [blame]
/* objcopy.c -- copy object file from input to output, optionally massaging it.
Copyright (C) 1991-2016 Free Software Foundation, Inc.
This file is part of GNU Binutils.
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. */
#include "sysdep.h"
#include "bfd.h"
#include "progress.h"
#include "getopt.h"
#include "libiberty.h"
#include "bucomm.h"
#include "budbg.h"
#include "filenames.h"
#include "fnmatch.h"
#include "elf-bfd.h"
#include "libbfd.h"
#include "coff/internal.h"
#include "libcoff.h"
/* FIXME: See bfd/peXXigen.c for why we include an architecture specific
header in generic PE code. */
#include "coff/i386.h"
#include "coff/pe.h"
static bfd_vma pe_file_alignment = (bfd_vma) -1;
static bfd_vma pe_heap_commit = (bfd_vma) -1;
static bfd_vma pe_heap_reserve = (bfd_vma) -1;
static bfd_vma pe_image_base = (bfd_vma) -1;
static bfd_vma pe_section_alignment = (bfd_vma) -1;
static bfd_vma pe_stack_commit = (bfd_vma) -1;
static bfd_vma pe_stack_reserve = (bfd_vma) -1;
static short pe_subsystem = -1;
static short pe_major_subsystem_version = -1;
static short pe_minor_subsystem_version = -1;
struct is_specified_symbol_predicate_data
{
const char * name;
bfd_boolean found;
};
/* A list to support redefine_sym. */
struct redefine_node
{
char *source;
char *target;
struct redefine_node *next;
};
struct addsym_node
{
struct addsym_node *next;
char * symdef;
long symval;
flagword flags;
char * section;
char * othersym;
};
typedef struct section_rename
{
const char * old_name;
const char * new_name;
flagword flags;
struct section_rename * next;
}
section_rename;
/* List of sections to be renamed. */
static section_rename *section_rename_list;
static asymbol **isympp = NULL; /* Input symbols. */
static asymbol **osympp = NULL; /* Output symbols that survive stripping. */
/* If `copy_byte' >= 0, copy 'copy_width' byte(s) of every `interleave' bytes. */
static int copy_byte = -1;
static int interleave = 0; /* Initialised to 4 in copy_main(). */
static int copy_width = 1;
static bfd_boolean verbose; /* Print file and target names. */
static bfd_boolean preserve_dates; /* Preserve input file timestamp. */
static int deterministic = -1; /* Enable deterministic archives. */
static int status = 0; /* Exit status. */
enum strip_action
{
STRIP_UNDEF,
STRIP_NONE, /* Don't strip. */
STRIP_DEBUG, /* Strip all debugger symbols. */
STRIP_UNNEEDED, /* Strip unnecessary symbols. */
STRIP_NONDEBUG, /* Strip everything but debug info. */
STRIP_DWO, /* Strip all DWO info. */
STRIP_NONDWO, /* Strip everything but DWO info. */
STRIP_ALL /* Strip all symbols. */
};
/* Which symbols to remove. */
static enum strip_action strip_symbols = STRIP_UNDEF;
enum locals_action
{
LOCALS_UNDEF,
LOCALS_START_L, /* Discard locals starting with L. */
LOCALS_ALL /* Discard all locals. */
};
/* Which local symbols to remove. Overrides STRIP_ALL. */
static enum locals_action discard_locals;
/* Structure used to hold lists of sections and actions to take. */
struct section_list
{
struct section_list * next; /* Next section to change. */
const char * pattern; /* Section name pattern. */
bfd_boolean used; /* Whether this entry was used. */
unsigned int context; /* What to do with matching sections. */
/* Flag bits used in the context field.
COPY and REMOVE are mutually exlusive. SET and ALTER are mutually exclusive. */
#define SECTION_CONTEXT_REMOVE (1 << 0) /* Remove this section. */
#define SECTION_CONTEXT_COPY (1 << 1) /* Copy this section, delete all non-copied section. */
#define SECTION_CONTEXT_SET_VMA (1 << 2) /* Set the sections' VMA address. */
#define SECTION_CONTEXT_ALTER_VMA (1 << 3) /* Increment or decrement the section's VMA address. */
#define SECTION_CONTEXT_SET_LMA (1 << 4) /* Set the sections' LMA address. */
#define SECTION_CONTEXT_ALTER_LMA (1 << 5) /* Increment or decrement the section's LMA address. */
#define SECTION_CONTEXT_SET_FLAGS (1 << 6) /* Set the section's flags. */
bfd_vma vma_val; /* Amount to change by or set to. */
bfd_vma lma_val; /* Amount to change by or set to. */
flagword flags; /* What to set the section flags to. */
};
static struct section_list *change_sections;
/* TRUE if some sections are to be removed. */
static bfd_boolean sections_removed;
/* TRUE if only some sections are to be copied. */
static bfd_boolean sections_copied;
/* Changes to the start address. */
static bfd_vma change_start = 0;
static bfd_boolean set_start_set = FALSE;
static bfd_vma set_start;
/* Changes to section addresses. */
static bfd_vma change_section_address = 0;
/* Filling gaps between sections. */
static bfd_boolean gap_fill_set = FALSE;
static bfd_byte gap_fill = 0;
/* Pad to a given address. */
static bfd_boolean pad_to_set = FALSE;
static bfd_vma pad_to;
/* Use alternative machine code? */
static unsigned long use_alt_mach_code = 0;
/* Output BFD flags user wants to set or clear */
static flagword bfd_flags_to_set;
static flagword bfd_flags_to_clear;
/* List of sections to add. */
struct section_add
{
/* Next section to add. */
struct section_add *next;
/* Name of section to add. */
const char *name;
/* Name of file holding section contents. */
const char *filename;
/* Size of file. */
size_t size;
/* Contents of file. */
bfd_byte *contents;
/* BFD section, after it has been added. */
asection *section;
};
/* List of sections to add to the output BFD. */
static struct section_add *add_sections;
/* List of sections to update in the output BFD. */
static struct section_add *update_sections;
/* List of sections to dump from the output BFD. */
static struct section_add *dump_sections;
/* If non-NULL the argument to --add-gnu-debuglink.
This should be the filename to store in the .gnu_debuglink section. */
static const char * gnu_debuglink_filename = NULL;
/* Whether to convert debugging information. */
static bfd_boolean convert_debugging = FALSE;
/* Whether to compress/decompress DWARF debug sections. */
static enum
{
nothing = 0,
compress = 1 << 0,
compress_zlib = compress | 1 << 1,
compress_gnu_zlib = compress | 1 << 2,
compress_gabi_zlib = compress | 1 << 3,
decompress = 1 << 4
} do_debug_sections = nothing;
/* Whether to generate ELF common symbols with the STT_COMMON type. */
static enum bfd_link_elf_stt_common do_elf_stt_common = unchanged;
/* Whether to change the leading character in symbol names. */
static bfd_boolean change_leading_char = FALSE;
/* Whether to remove the leading character from global symbol names. */
static bfd_boolean remove_leading_char = FALSE;
/* Whether to permit wildcard in symbol comparison. */
static bfd_boolean wildcard = FALSE;
/* True if --localize-hidden is in effect. */
static bfd_boolean localize_hidden = FALSE;
/* List of symbols to strip, keep, localize, keep-global, weaken,
or redefine. */
static htab_t strip_specific_htab = NULL;
static htab_t strip_unneeded_htab = NULL;
static htab_t keep_specific_htab = NULL;
static htab_t localize_specific_htab = NULL;
static htab_t globalize_specific_htab = NULL;
static htab_t keepglobal_specific_htab = NULL;
static htab_t weaken_specific_htab = NULL;
static struct redefine_node *redefine_sym_list = NULL;
static struct addsym_node *add_sym_list = NULL, **add_sym_tail = &add_sym_list;
static int add_symbols = 0;
/* If this is TRUE, we weaken global symbols (set BSF_WEAK). */
static bfd_boolean weaken = FALSE;
/* If this is TRUE, we retain BSF_FILE symbols. */
static bfd_boolean keep_file_symbols = FALSE;
/* Prefix symbols/sections. */
static char *prefix_symbols_string = 0;
static char *prefix_sections_string = 0;
static char *prefix_alloc_sections_string = 0;
/* True if --extract-symbol was passed on the command line. */
static bfd_boolean extract_symbol = FALSE;
/* If `reverse_bytes' is nonzero, then reverse the order of every chunk
of <reverse_bytes> bytes within each output section. */
static int reverse_bytes = 0;
/* For Coff objects, we may want to allow or disallow long section names,
or preserve them where found in the inputs. Debug info relies on them. */
enum long_section_name_handling
{
DISABLE,
ENABLE,
KEEP
};
/* The default long section handling mode is to preserve them.
This is also the only behaviour for 'strip'. */
static enum long_section_name_handling long_section_names = KEEP;
/* 150 isn't special; it's just an arbitrary non-ASCII char value. */
enum command_line_switch
{
OPTION_ADD_SECTION=150,
OPTION_ADD_GNU_DEBUGLINK,
OPTION_ADD_SYMBOL,
OPTION_ALT_MACH_CODE,
OPTION_CHANGE_ADDRESSES,
OPTION_CHANGE_LEADING_CHAR,
OPTION_CHANGE_SECTION_ADDRESS,
OPTION_CHANGE_SECTION_LMA,
OPTION_CHANGE_SECTION_VMA,
OPTION_CHANGE_START,
OPTION_CHANGE_WARNINGS,
OPTION_COMPRESS_DEBUG_SECTIONS,
OPTION_DEBUGGING,
OPTION_DECOMPRESS_DEBUG_SECTIONS,
OPTION_DUMP_SECTION,
OPTION_ELF_STT_COMMON,
OPTION_EXTRACT_DWO,
OPTION_EXTRACT_SYMBOL,
OPTION_FILE_ALIGNMENT,
OPTION_FORMATS_INFO,
OPTION_GAP_FILL,
OPTION_GLOBALIZE_SYMBOL,
OPTION_GLOBALIZE_SYMBOLS,
OPTION_HEAP,
OPTION_IMAGE_BASE,
OPTION_IMPURE,
OPTION_INTERLEAVE_WIDTH,
OPTION_KEEPGLOBAL_SYMBOLS,
OPTION_KEEP_FILE_SYMBOLS,
OPTION_KEEP_SYMBOLS,
OPTION_LOCALIZE_HIDDEN,
OPTION_LOCALIZE_SYMBOLS,
OPTION_LONG_SECTION_NAMES,
OPTION_NO_CHANGE_WARNINGS,
OPTION_ONLY_KEEP_DEBUG,
OPTION_PAD_TO,
OPTION_PREFIX_ALLOC_SECTIONS,
OPTION_PREFIX_SECTIONS,
OPTION_PREFIX_SYMBOLS,
OPTION_PURE,
OPTION_READONLY_TEXT,
OPTION_REDEFINE_SYM,
OPTION_REDEFINE_SYMS,
OPTION_REMOVE_LEADING_CHAR,
OPTION_RENAME_SECTION,
OPTION_REVERSE_BYTES,
OPTION_SECTION_ALIGNMENT,
OPTION_SET_SECTION_FLAGS,
OPTION_SET_START,
OPTION_SREC_FORCES3,
OPTION_SREC_LEN,
OPTION_STACK,
OPTION_STRIP_DWO,
OPTION_STRIP_SYMBOLS,
OPTION_STRIP_UNNEEDED,
OPTION_STRIP_UNNEEDED_SYMBOL,
OPTION_STRIP_UNNEEDED_SYMBOLS,
OPTION_SUBSYSTEM,
OPTION_UPDATE_SECTION,
OPTION_WEAKEN,
OPTION_WEAKEN_SYMBOLS,
OPTION_WRITABLE_TEXT
};
/* Options to handle if running as "strip". */
static struct option strip_options[] =
{
{"disable-deterministic-archives", no_argument, 0, 'U'},
{"discard-all", no_argument, 0, 'x'},
{"discard-locals", no_argument, 0, 'X'},
{"enable-deterministic-archives", no_argument, 0, 'D'},
{"format", required_argument, 0, 'F'}, /* Obsolete */
{"help", no_argument, 0, 'h'},
{"info", no_argument, 0, OPTION_FORMATS_INFO},
{"input-format", required_argument, 0, 'I'}, /* Obsolete */
{"input-target", required_argument, 0, 'I'},
{"keep-file-symbols", no_argument, 0, OPTION_KEEP_FILE_SYMBOLS},
{"keep-symbol", required_argument, 0, 'K'},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
{"output-file", required_argument, 0, 'o'},
{"output-format", required_argument, 0, 'O'}, /* Obsolete */
{"output-target", required_argument, 0, 'O'},
{"preserve-dates", no_argument, 0, 'p'},
{"remove-section", required_argument, 0, 'R'},
{"strip-all", no_argument, 0, 's'},
{"strip-debug", no_argument, 0, 'S'},
{"strip-dwo", no_argument, 0, OPTION_STRIP_DWO},
{"strip-symbol", required_argument, 0, 'N'},
{"strip-unneeded", no_argument, 0, OPTION_STRIP_UNNEEDED},
{"target", required_argument, 0, 'F'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"wildcard", no_argument, 0, 'w'},
{0, no_argument, 0, 0}
};
/* Options to handle if running as "objcopy". */
static struct option copy_options[] =
{
{"add-gnu-debuglink", required_argument, 0, OPTION_ADD_GNU_DEBUGLINK},
{"add-section", required_argument, 0, OPTION_ADD_SECTION},
{"add-symbol", required_argument, 0, OPTION_ADD_SYMBOL},
{"adjust-section-vma", required_argument, 0, OPTION_CHANGE_SECTION_ADDRESS},
{"adjust-start", required_argument, 0, OPTION_CHANGE_START},
{"adjust-vma", required_argument, 0, OPTION_CHANGE_ADDRESSES},
{"adjust-warnings", no_argument, 0, OPTION_CHANGE_WARNINGS},
{"alt-machine-code", required_argument, 0, OPTION_ALT_MACH_CODE},
{"binary-architecture", required_argument, 0, 'B'},
{"byte", required_argument, 0, 'b'},
{"change-addresses", required_argument, 0, OPTION_CHANGE_ADDRESSES},
{"change-leading-char", no_argument, 0, OPTION_CHANGE_LEADING_CHAR},
{"change-section-address", required_argument, 0, OPTION_CHANGE_SECTION_ADDRESS},
{"change-section-lma", required_argument, 0, OPTION_CHANGE_SECTION_LMA},
{"change-section-vma", required_argument, 0, OPTION_CHANGE_SECTION_VMA},
{"change-start", required_argument, 0, OPTION_CHANGE_START},
{"change-warnings", no_argument, 0, OPTION_CHANGE_WARNINGS},
{"compress-debug-sections", optional_argument, 0, OPTION_COMPRESS_DEBUG_SECTIONS},
{"debugging", no_argument, 0, OPTION_DEBUGGING},
{"decompress-debug-sections", no_argument, 0, OPTION_DECOMPRESS_DEBUG_SECTIONS},
{"disable-deterministic-archives", no_argument, 0, 'U'},
{"discard-all", no_argument, 0, 'x'},
{"discard-locals", no_argument, 0, 'X'},
{"dump-section", required_argument, 0, OPTION_DUMP_SECTION},
{"elf-stt-common", required_argument, 0, OPTION_ELF_STT_COMMON},
{"enable-deterministic-archives", no_argument, 0, 'D'},
{"extract-dwo", no_argument, 0, OPTION_EXTRACT_DWO},
{"extract-symbol", no_argument, 0, OPTION_EXTRACT_SYMBOL},
{"file-alignment", required_argument, 0, OPTION_FILE_ALIGNMENT},
{"format", required_argument, 0, 'F'}, /* Obsolete */
{"gap-fill", required_argument, 0, OPTION_GAP_FILL},
{"globalize-symbol", required_argument, 0, OPTION_GLOBALIZE_SYMBOL},
{"globalize-symbols", required_argument, 0, OPTION_GLOBALIZE_SYMBOLS},
{"heap", required_argument, 0, OPTION_HEAP},
{"help", no_argument, 0, 'h'},
{"image-base", required_argument, 0 , OPTION_IMAGE_BASE},
{"impure", no_argument, 0, OPTION_IMPURE},
{"info", no_argument, 0, OPTION_FORMATS_INFO},
{"input-format", required_argument, 0, 'I'}, /* Obsolete */
{"input-target", required_argument, 0, 'I'},
{"interleave", optional_argument, 0, 'i'},
{"interleave-width", required_argument, 0, OPTION_INTERLEAVE_WIDTH},
{"keep-file-symbols", no_argument, 0, OPTION_KEEP_FILE_SYMBOLS},
{"keep-global-symbol", required_argument, 0, 'G'},
{"keep-global-symbols", required_argument, 0, OPTION_KEEPGLOBAL_SYMBOLS},
{"keep-symbol", required_argument, 0, 'K'},
{"keep-symbols", required_argument, 0, OPTION_KEEP_SYMBOLS},
{"localize-hidden", no_argument, 0, OPTION_LOCALIZE_HIDDEN},
{"localize-symbol", required_argument, 0, 'L'},
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"long-section-names", required_argument, 0, OPTION_LONG_SECTION_NAMES},
{"no-adjust-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"no-change-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
{"only-section", required_argument, 0, 'j'},
{"output-format", required_argument, 0, 'O'}, /* Obsolete */
{"output-target", required_argument, 0, 'O'},
{"pad-to", required_argument, 0, OPTION_PAD_TO},
{"prefix-alloc-sections", required_argument, 0, OPTION_PREFIX_ALLOC_SECTIONS},
{"prefix-sections", required_argument, 0, OPTION_PREFIX_SECTIONS},
{"prefix-symbols", required_argument, 0, OPTION_PREFIX_SYMBOLS},
{"preserve-dates", no_argument, 0, 'p'},
{"pure", no_argument, 0, OPTION_PURE},
{"readonly-text", no_argument, 0, OPTION_READONLY_TEXT},
{"redefine-sym", required_argument, 0, OPTION_REDEFINE_SYM},
{"redefine-syms", required_argument, 0, OPTION_REDEFINE_SYMS},
{"remove-leading-char", no_argument, 0, OPTION_REMOVE_LEADING_CHAR},
{"remove-section", required_argument, 0, 'R'},
{"rename-section", required_argument, 0, OPTION_RENAME_SECTION},
{"reverse-bytes", required_argument, 0, OPTION_REVERSE_BYTES},
{"section-alignment", required_argument, 0, OPTION_SECTION_ALIGNMENT},
{"set-section-flags", required_argument, 0, OPTION_SET_SECTION_FLAGS},
{"set-start", required_argument, 0, OPTION_SET_START},
{"srec-forceS3", no_argument, 0, OPTION_SREC_FORCES3},
{"srec-len", required_argument, 0, OPTION_SREC_LEN},
{"stack", required_argument, 0, OPTION_STACK},
{"strip-all", no_argument, 0, 'S'},
{"strip-debug", no_argument, 0, 'g'},
{"strip-dwo", no_argument, 0, OPTION_STRIP_DWO},
{"strip-symbol", required_argument, 0, 'N'},
{"strip-symbols", required_argument, 0, OPTION_STRIP_SYMBOLS},
{"strip-unneeded", no_argument, 0, OPTION_STRIP_UNNEEDED},
{"strip-unneeded-symbol", required_argument, 0, OPTION_STRIP_UNNEEDED_SYMBOL},
{"strip-unneeded-symbols", required_argument, 0, OPTION_STRIP_UNNEEDED_SYMBOLS},
{"subsystem", required_argument, 0, OPTION_SUBSYSTEM},
{"target", required_argument, 0, 'F'},
{"update-section", required_argument, 0, OPTION_UPDATE_SECTION},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"weaken", no_argument, 0, OPTION_WEAKEN},
{"weaken-symbol", required_argument, 0, 'W'},
{"weaken-symbols", required_argument, 0, OPTION_WEAKEN_SYMBOLS},
{"wildcard", no_argument, 0, 'w'},
{"writable-text", no_argument, 0, OPTION_WRITABLE_TEXT},
{0, no_argument, 0, 0}
};
/* IMPORTS */
extern char *program_name;
/* This flag distinguishes between strip and objcopy:
1 means this is 'strip'; 0 means this is 'objcopy'.
-1 means if we should use argv[0] to decide. */
extern int is_strip;
/* The maximum length of an S record. This variable is declared in srec.c
and can be modified by the --srec-len parameter. */
extern unsigned int Chunk;
/* Restrict the generation of Srecords to type S3 only.
This variable is declare in bfd/srec.c and can be toggled
on by the --srec-forceS3 command line switch. */
extern bfd_boolean S3Forced;
/* Forward declarations. */
static void setup_section (bfd *, asection *, void *);
static void setup_bfd_headers (bfd *, bfd *);
static void copy_relocations_in_section (bfd *, asection *, void *);
static void copy_section (bfd *, asection *, void *);
static void get_sections (bfd *, asection *, void *);
static int compare_section_lma (const void *, const void *);
static void mark_symbols_used_in_relocations (bfd *, asection *, void *);
static bfd_boolean write_debugging_info (bfd *, void *, long *, asymbol ***);
static const char *lookup_sym_redefinition (const char *);
static const char *find_section_rename (const char *, flagword *);
static void
copy_usage (FILE *stream, int exit_status)
{
fprintf (stream, _("Usage: %s [option(s)] in-file [out-file]\n"), program_name);
fprintf (stream, _(" Copies a binary file, possibly transforming it in the process\n"));
fprintf (stream, _(" The options are:\n"));
fprintf (stream, _("\
-I --input-target <bfdname> Assume input file is in format <bfdname>\n\
-O --output-target <bfdname> Create an output file in format <bfdname>\n\
-B --binary-architecture <arch> Set output arch, when input is arch-less\n\
-F --target <bfdname> Set both input and output format to <bfdname>\n\
--debugging Convert debugging information, if possible\n\
-p --preserve-dates Copy modified/access timestamps to the output\n"));
if (DEFAULT_AR_DETERMINISTIC)
fprintf (stream, _("\
-D --enable-deterministic-archives\n\
Produce deterministic output when stripping archives (default)\n\
-U --disable-deterministic-archives\n\
Disable -D behavior\n"));
else
fprintf (stream, _("\
-D --enable-deterministic-archives\n\
Produce deterministic output when stripping archives\n\
-U --disable-deterministic-archives\n\
Disable -D behavior (default)\n"));
fprintf (stream, _("\
-j --only-section <name> Only copy section <name> into the output\n\
--add-gnu-debuglink=<file> Add section .gnu_debuglink linking to <file>\n\
-R --remove-section <name> Remove section <name> from the output\n\
-S --strip-all Remove all symbol and relocation information\n\
-g --strip-debug Remove all debugging symbols & sections\n\
--strip-dwo Remove all DWO sections\n\
--strip-unneeded Remove all symbols not needed by relocations\n\
-N --strip-symbol <name> Do not copy symbol <name>\n\
--strip-unneeded-symbol <name>\n\
Do not copy symbol <name> unless needed by\n\
relocations\n\
--only-keep-debug Strip everything but the debug information\n\
--extract-dwo Copy only DWO sections\n\
--extract-symbol Remove section contents but keep symbols\n\
-K --keep-symbol <name> Do not strip symbol <name>\n\
--keep-file-symbols Do not strip file symbol(s)\n\
--localize-hidden Turn all ELF hidden symbols into locals\n\
-L --localize-symbol <name> Force symbol <name> to be marked as a local\n\
--globalize-symbol <name> Force symbol <name> to be marked as a global\n\
-G --keep-global-symbol <name> Localize all symbols except <name>\n\
-W --weaken-symbol <name> Force symbol <name> to be marked as a weak\n\
--weaken Force all global symbols to be marked as weak\n\
-w --wildcard Permit wildcard in symbol comparison\n\
-x --discard-all Remove all non-global symbols\n\
-X --discard-locals Remove any compiler-generated symbols\n\
-i --interleave[=<number>] Only copy N out of every <number> bytes\n\
--interleave-width <number> Set N for --interleave\n\
-b --byte <num> Select byte <num> in every interleaved block\n\
--gap-fill <val> Fill gaps between sections with <val>\n\
--pad-to <addr> Pad the last section up to address <addr>\n\
--set-start <addr> Set the start address to <addr>\n\
{--change-start|--adjust-start} <incr>\n\
Add <incr> to the start address\n\
{--change-addresses|--adjust-vma} <incr>\n\
Add <incr> to LMA, VMA and start addresses\n\
{--change-section-address|--adjust-section-vma} <name>{=|+|-}<val>\n\
Change LMA and VMA of section <name> by <val>\n\
--change-section-lma <name>{=|+|-}<val>\n\
Change the LMA of section <name> by <val>\n\
--change-section-vma <name>{=|+|-}<val>\n\
Change the VMA of section <name> by <val>\n\
{--[no-]change-warnings|--[no-]adjust-warnings}\n\
Warn if a named section does not exist\n\
--set-section-flags <name>=<flags>\n\
Set section <name>'s properties to <flags>\n\
--add-section <name>=<file> Add section <name> found in <file> to output\n\
--update-section <name>=<file>\n\
Update contents of section <name> with\n\
contents found in <file>\n\
--dump-section <name>=<file> Dump the contents of section <name> into <file>\n\
--rename-section <old>=<new>[,<flags>] Rename section <old> to <new>\n\
--long-section-names {enable|disable|keep}\n\
Handle long section names in Coff objects.\n\
--change-leading-char Force output format's leading character style\n\
--remove-leading-char Remove leading character from global symbols\n\
--reverse-bytes=<num> Reverse <num> bytes at a time, in output sections with content\n\
--redefine-sym <old>=<new> Redefine symbol name <old> to <new>\n\
--redefine-syms <file> --redefine-sym for all symbol pairs \n\
listed in <file>\n\
--srec-len <number> Restrict the length of generated Srecords\n\
--srec-forceS3 Restrict the type of generated Srecords to S3\n\
--strip-symbols <file> -N for all symbols listed in <file>\n\
--strip-unneeded-symbols <file>\n\
--strip-unneeded-symbol for all symbols listed\n\
in <file>\n\
--keep-symbols <file> -K for all symbols listed in <file>\n\
--localize-symbols <file> -L for all symbols listed in <file>\n\
--globalize-symbols <file> --globalize-symbol for all in <file>\n\
--keep-global-symbols <file> -G for all symbols listed in <file>\n\
--weaken-symbols <file> -W for all symbols listed in <file>\n\
--add-symbol <name>=[<section>:]<value>[,<flags>] Add a symbol\n\
--alt-machine-code <index> Use the target's <index>'th alternative machine\n\
--writable-text Mark the output text as writable\n\
--readonly-text Make the output text write protected\n\
--pure Mark the output file as demand paged\n\
--impure Mark the output file as impure\n\
--prefix-symbols <prefix> Add <prefix> to start of every symbol name\n\
--prefix-sections <prefix> Add <prefix> to start of every section name\n\
--prefix-alloc-sections <prefix>\n\
Add <prefix> to start of every allocatable\n\
section name\n\
--file-alignment <num> Set PE file alignment to <num>\n\
--heap <reserve>[,<commit>] Set PE reserve/commit heap to <reserve>/\n\
<commit>\n\
--image-base <address> Set PE image base to <address>\n\
--section-alignment <num> Set PE section alignment to <num>\n\
--stack <reserve>[,<commit>] Set PE reserve/commit stack to <reserve>/\n\
<commit>\n\
--subsystem <name>[:<version>]\n\
Set PE subsystem to <name> [& <version>]\n\
--compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
Compress DWARF debug sections using zlib\n\
--decompress-debug-sections Decompress DWARF debug sections using zlib\n\
--elf-stt-common=[yes|no] Generate ELF common symbols with STT_COMMON\n\
type\n\
-v --verbose List all object files modified\n\
@<file> Read options from <file>\n\
-V --version Display this program's version number\n\
-h --help Display this output\n\
--info List object formats & architectures supported\n\
"));
list_supported_targets (program_name, stream);
if (REPORT_BUGS_TO[0] && exit_status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (exit_status);
}
static void
strip_usage (FILE *stream, int exit_status)
{
fprintf (stream, _("Usage: %s <option(s)> in-file(s)\n"), program_name);
fprintf (stream, _(" Removes symbols and sections from files\n"));
fprintf (stream, _(" The options are:\n"));
fprintf (stream, _("\
-I --input-target=<bfdname> Assume input file is in format <bfdname>\n\
-O --output-target=<bfdname> Create an output file in format <bfdname>\n\
-F --target=<bfdname> Set both input and output format to <bfdname>\n\
-p --preserve-dates Copy modified/access timestamps to the output\n\
"));
if (DEFAULT_AR_DETERMINISTIC)
fprintf (stream, _("\
-D --enable-deterministic-archives\n\
Produce deterministic output when stripping archives (default)\n\
-U --disable-deterministic-archives\n\
Disable -D behavior\n"));
else
fprintf (stream, _("\
-D --enable-deterministic-archives\n\
Produce deterministic output when stripping archives\n\
-U --disable-deterministic-archives\n\
Disable -D behavior (default)\n"));
fprintf (stream, _("\
-R --remove-section=<name> Also remove section <name> from the output\n\
-s --strip-all Remove all symbol and relocation information\n\
-g -S -d --strip-debug Remove all debugging symbols & sections\n\
--strip-dwo Remove all DWO sections\n\
--strip-unneeded Remove all symbols not needed by relocations\n\
--only-keep-debug Strip everything but the debug information\n\
-N --strip-symbol=<name> Do not copy symbol <name>\n\
-K --keep-symbol=<name> Do not strip symbol <name>\n\
--keep-file-symbols Do not strip file symbol(s)\n\
-w --wildcard Permit wildcard in symbol comparison\n\
-x --discard-all Remove all non-global symbols\n\
-X --discard-locals Remove any compiler-generated symbols\n\
-v --verbose List all object files modified\n\
-V --version Display this program's version number\n\
-h --help Display this output\n\
--info List object formats & architectures supported\n\
-o <file> Place stripped output into <file>\n\
"));
list_supported_targets (program_name, stream);
if (REPORT_BUGS_TO[0] && exit_status == 0)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
exit (exit_status);
}
/* Parse section flags into a flagword, with a fatal error if the
string can't be parsed. */
static flagword
parse_flags (const char *s)
{
flagword ret;
const char *snext;
int len;
ret = SEC_NO_FLAGS;
do
{
snext = strchr (s, ',');
if (snext == NULL)
len = strlen (s);
else
{
len = snext - s;
++snext;
}
if (0) ;
#define PARSE_FLAG(fname,fval) \
else if (strncasecmp (fname, s, len) == 0) ret |= fval
PARSE_FLAG ("alloc", SEC_ALLOC);
PARSE_FLAG ("load", SEC_LOAD);
PARSE_FLAG ("noload", SEC_NEVER_LOAD);
PARSE_FLAG ("readonly", SEC_READONLY);
PARSE_FLAG ("debug", SEC_DEBUGGING);
PARSE_FLAG ("code", SEC_CODE);
PARSE_FLAG ("data", SEC_DATA);
PARSE_FLAG ("rom", SEC_ROM);
PARSE_FLAG ("share", SEC_COFF_SHARED);
PARSE_FLAG ("contents", SEC_HAS_CONTENTS);
PARSE_FLAG ("merge", SEC_MERGE);
PARSE_FLAG ("strings", SEC_STRINGS);
#undef PARSE_FLAG
else
{
char *copy;
copy = (char *) xmalloc (len + 1);
strncpy (copy, s, len);
copy[len] = '\0';
non_fatal (_("unrecognized section flag `%s'"), copy);
fatal (_("supported flags: %s"),
"alloc, load, noload, readonly, debug, code, data, rom, share, contents, merge, strings");
}
s = snext;
}
while (s != NULL);
return ret;
}
/* Parse symbol flags into a flagword, with a fatal error if the
string can't be parsed. */
static flagword
parse_symflags (const char *s, char **other)
{
flagword ret;
const char *snext;
size_t len;
ret = BSF_NO_FLAGS;
do
{
snext = strchr (s, ',');
if (snext == NULL)
len = strlen (s);
else
{
len = snext - s;
++snext;
}
#define PARSE_FLAG(fname, fval) \
else if (len == sizeof fname - 1 \
&& strncasecmp (fname, s, len) == 0) \
ret |= fval
#define PARSE_OTHER(fname, fval) \
else if (len >= sizeof fname \
&& strncasecmp (fname, s, sizeof fname - 1) == 0) \
fval = xstrndup (s + sizeof fname - 1, len - sizeof fname + 1)
if (0) ;
PARSE_FLAG ("local", BSF_LOCAL);
PARSE_FLAG ("global", BSF_GLOBAL);
PARSE_FLAG ("export", BSF_EXPORT);
PARSE_FLAG ("debug", BSF_DEBUGGING);
PARSE_FLAG ("function", BSF_FUNCTION);
PARSE_FLAG ("weak", BSF_WEAK);
PARSE_FLAG ("section", BSF_SECTION_SYM);
PARSE_FLAG ("constructor", BSF_CONSTRUCTOR);
PARSE_FLAG ("warning", BSF_WARNING);
PARSE_FLAG ("indirect", BSF_INDIRECT);
PARSE_FLAG ("file", BSF_FILE);
PARSE_FLAG ("object", BSF_OBJECT);
PARSE_FLAG ("synthetic", BSF_SYNTHETIC);
PARSE_FLAG ("indirect-function", BSF_GNU_INDIRECT_FUNCTION | BSF_FUNCTION);
PARSE_FLAG ("unique-object", BSF_GNU_UNIQUE | BSF_OBJECT);
PARSE_OTHER ("before=", *other);
#undef PARSE_FLAG
#undef PARSE_OTHER
else
{
char *copy;
copy = (char *) xmalloc (len + 1);
strncpy (copy, s, len);
copy[len] = '\0';
non_fatal (_("unrecognized symbol flag `%s'"), copy);
fatal (_("supported flags: %s"),
"local, global, export, debug, function, weak, section, "
"constructor, warning, indirect, file, object, synthetic, "
"indirect-function, unique-object, before=<othersym>");
}
s = snext;
}
while (s != NULL);
return ret;
}
/* Find and optionally add an entry in the change_sections list.
We need to be careful in how we match section names because of the support
for wildcard characters. For example suppose that the user has invoked
objcopy like this:
--set-section-flags .debug_*=debug
--set-section-flags .debug_str=readonly,debug
--change-section-address .debug_*ranges=0x1000
With the idea that all debug sections will receive the DEBUG flag, the
.debug_str section will also receive the READONLY flag and the
.debug_ranges and .debug_aranges sections will have their address set to
0x1000. (This may not make much sense, but it is just an example).
When adding the section name patterns to the section list we need to make
sure that previous entries do not match with the new entry, unless the
match is exact. (In which case we assume that the user is overriding
the previous entry with the new context).
When matching real section names to the section list we make use of the
wildcard characters, but we must do so in context. Eg if we are setting
section addresses then we match for .debug_ranges but not for .debug_info.
Finally, if ADD is false and we do find a match, we mark the section list
entry as used. */
static struct section_list *
find_section_list (const char *name, bfd_boolean add, unsigned int context)
{
struct section_list *p;
/* assert ((context & ((1 << 7) - 1)) != 0); */
for (p = change_sections; p != NULL; p = p->next)
{
if (add)
{
if (strcmp (p->pattern, name) == 0)
{
/* Check for context conflicts. */
if (((p->context & SECTION_CONTEXT_REMOVE)
&& (context & SECTION_CONTEXT_COPY))
|| ((context & SECTION_CONTEXT_REMOVE)
&& (p->context & SECTION_CONTEXT_COPY)))
fatal (_("error: %s both copied and removed"), name);
if (((p->context & SECTION_CONTEXT_SET_VMA)
&& (context & SECTION_CONTEXT_ALTER_VMA))
|| ((context & SECTION_CONTEXT_SET_VMA)
&& (context & SECTION_CONTEXT_ALTER_VMA)))
fatal (_("error: %s both sets and alters VMA"), name);
if (((p->context & SECTION_CONTEXT_SET_LMA)
&& (context & SECTION_CONTEXT_ALTER_LMA))
|| ((context & SECTION_CONTEXT_SET_LMA)
&& (context & SECTION_CONTEXT_ALTER_LMA)))
fatal (_("error: %s both sets and alters LMA"), name);
/* Extend the context. */
p->context |= context;
return p;
}
}
/* If we are not adding a new name/pattern then
only check for a match if the context applies. */
else if ((p->context & context)
/* We could check for the presence of wildchar characters
first and choose between calling strcmp and fnmatch,
but is that really worth it ? */
&& fnmatch (p->pattern, name, 0) == 0)
{
p->used = TRUE;
return p;
}
}
if (! add)
return NULL;
p = (struct section_list *) xmalloc (sizeof (struct section_list));
p->pattern = name;
p->used = FALSE;
p->context = context;
p->vma_val = 0;
p->lma_val = 0;
p->flags = 0;
p->next = change_sections;
change_sections = p;
return p;
}
/* There is htab_hash_string but no htab_eq_string. Makes sense. */
static int
eq_string (const void *s1, const void *s2)
{
return strcmp ((const char *) s1, (const char *) s2) == 0;
}
static htab_t
create_symbol_htab (void)
{
return htab_create_alloc (16, htab_hash_string, eq_string, NULL, xcalloc, free);
}
static void
create_symbol_htabs (void)
{
strip_specific_htab = create_symbol_htab ();
strip_unneeded_htab = create_symbol_htab ();
keep_specific_htab = create_symbol_htab ();
localize_specific_htab = create_symbol_htab ();
globalize_specific_htab = create_symbol_htab ();
keepglobal_specific_htab = create_symbol_htab ();
weaken_specific_htab = create_symbol_htab ();
}
/* Add a symbol to strip_specific_list. */
static void
add_specific_symbol (const char *name, htab_t htab)
{
*htab_find_slot (htab, name, INSERT) = (char *) name;
}
/* Add symbols listed in `filename' to strip_specific_list. */
#define IS_WHITESPACE(c) ((c) == ' ' || (c) == '\t')
#define IS_LINE_TERMINATOR(c) ((c) == '\n' || (c) == '\r' || (c) == '\0')
static void
add_specific_symbols (const char *filename, htab_t htab)
{
off_t size;
FILE * f;
char * line;
char * buffer;
unsigned int line_count;
size = get_file_size (filename);
if (size == 0)
{
status = 1;
return;
}
buffer = (char *) xmalloc (size + 2);
f = fopen (filename, FOPEN_RT);
if (f == NULL)
fatal (_("cannot open '%s': %s"), filename, strerror (errno));
if (fread (buffer, 1, size, f) == 0 || ferror (f))
fatal (_("%s: fread failed"), filename);
fclose (f);
buffer [size] = '\n';
buffer [size + 1] = '\0';
line_count = 1;
for (line = buffer; * line != '\0'; line ++)
{
char * eol;
char * name;
char * name_end;
int finished = FALSE;
for (eol = line;; eol ++)
{
switch (* eol)
{
case '\n':
* eol = '\0';
/* Cope with \n\r. */
if (eol[1] == '\r')
++ eol;
finished = TRUE;
break;
case '\r':
* eol = '\0';
/* Cope with \r\n. */
if (eol[1] == '\n')
++ eol;
finished = TRUE;
break;
case 0:
finished = TRUE;
break;
case '#':
/* Line comment, Terminate the line here, in case a
name is present and then allow the rest of the
loop to find the real end of the line. */
* eol = '\0';
break;
default:
break;
}
if (finished)
break;
}
/* A name may now exist somewhere between 'line' and 'eol'.
Strip off leading whitespace and trailing whitespace,
then add it to the list. */
for (name = line; IS_WHITESPACE (* name); name ++)
;
for (name_end = name;
(! IS_WHITESPACE (* name_end))
&& (! IS_LINE_TERMINATOR (* name_end));
name_end ++)
;
if (! IS_LINE_TERMINATOR (* name_end))
{
char * extra;
for (extra = name_end + 1; IS_WHITESPACE (* extra); extra ++)
;
if (! IS_LINE_TERMINATOR (* extra))
non_fatal (_("%s:%d: Ignoring rubbish found on this line"),
filename, line_count);
}
* name_end = '\0';
if (name_end > name)
add_specific_symbol (name, htab);
/* Advance line pointer to end of line. The 'eol ++' in the for
loop above will then advance us to the start of the next line. */
line = eol;
line_count ++;
}
}
/* See whether a symbol should be stripped or kept
based on strip_specific_list and keep_symbols. */
static int
is_specified_symbol_predicate (void **slot, void *data)
{
struct is_specified_symbol_predicate_data *d =
(struct is_specified_symbol_predicate_data *) data;
const char *slot_name = (char *) *slot;
if (*slot_name != '!')
{
if (! fnmatch (slot_name, d->name, 0))
{
d->found = TRUE;
/* Continue traversal, there might be a non-match rule. */
return 1;
}
}
else
{
if (! fnmatch (slot_name + 1, d->name, 0))
{
d->found = FALSE;
/* Stop traversal. */
return 0;
}
}
/* Continue traversal. */
return 1;
}
static bfd_boolean
is_specified_symbol (const char *name, htab_t htab)
{
if (wildcard)
{
struct is_specified_symbol_predicate_data data;
data.name = name;
data.found = FALSE;
htab_traverse (htab, is_specified_symbol_predicate, &data);
return data.found;
}
return htab_find (htab, name) != NULL;
}
/* Return a pointer to the symbol used as a signature for GROUP. */
static asymbol *
group_signature (asection *group)
{
bfd *abfd = group->owner;
Elf_Internal_Shdr *ghdr;
/* PR 20089: An earlier error may have prevented us from loading the symbol table. */
if (isympp == NULL)
return NULL;
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
return NULL;
ghdr = &elf_section_data (group)->this_hdr;
if (ghdr->sh_link < elf_numsections (abfd))
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
Elf_Internal_Shdr *symhdr = elf_elfsections (abfd) [ghdr->sh_link];
if (symhdr->sh_type == SHT_SYMTAB
&& ghdr->sh_info > 0
&& ghdr->sh_info < (symhdr->sh_size / bed->s->sizeof_sym))
return isympp[ghdr->sh_info - 1];
}
return NULL;
}
/* Return TRUE if the section is a DWO section. */
static bfd_boolean
is_dwo_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
const char *name = bfd_get_section_name (abfd, sec);
int len = strlen (name);
return strncmp (name + len - 4, ".dwo", 4) == 0;
}
/* Return TRUE if section SEC is in the update list. */
static bfd_boolean
is_update_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
if (update_sections != NULL)
{
struct section_add *pupdate;
for (pupdate = update_sections;
pupdate != NULL;
pupdate = pupdate->next)
{
if (strcmp (sec->name, pupdate->name) == 0)
return TRUE;
}
}
return FALSE;
}
/* See if a non-group section is being removed. */
static bfd_boolean
is_strip_section_1 (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
if (sections_removed || sections_copied)
{
struct section_list *p;
struct section_list *q;
p = find_section_list (bfd_get_section_name (abfd, sec), FALSE,
SECTION_CONTEXT_REMOVE);
q = find_section_list (bfd_get_section_name (abfd, sec), FALSE,
SECTION_CONTEXT_COPY);
if (p && q)
fatal (_("error: section %s matches both remove and copy options"),
bfd_get_section_name (abfd, sec));
if (p && is_update_section (abfd, sec))
fatal (_("error: section %s matches both update and remove options"),
bfd_get_section_name (abfd, sec));
if (p != NULL)
return TRUE;
if (sections_copied && q == NULL)
return TRUE;
}
if ((bfd_get_section_flags (abfd, sec) & SEC_DEBUGGING) != 0)
{
if (strip_symbols == STRIP_DEBUG
|| strip_symbols == STRIP_UNNEEDED
|| strip_symbols == STRIP_ALL
|| discard_locals == LOCALS_ALL
|| convert_debugging)
{
/* By default we don't want to strip .reloc section.
This section has for pe-coff special meaning. See
pe-dll.c file in ld, and peXXigen.c in bfd for details. */
if (strcmp (bfd_get_section_name (abfd, sec), ".reloc") != 0)
return TRUE;
}
if (strip_symbols == STRIP_DWO)
return is_dwo_section (abfd, sec);
if (strip_symbols == STRIP_NONDEBUG)
return FALSE;
}
if (strip_symbols == STRIP_NONDWO)
return !is_dwo_section (abfd, sec);
return FALSE;
}
/* See if a section is being removed. */
static bfd_boolean
is_strip_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
if (is_strip_section_1 (abfd, sec))
return TRUE;
if ((bfd_get_section_flags (abfd, sec) & SEC_GROUP) != 0)
{
asymbol *gsym;
const char *gname;
asection *elt, *first;
/* PR binutils/3181
If we are going to strip the group signature symbol, then
strip the group section too. */
gsym = group_signature (sec);
if (gsym != NULL)
gname = gsym->name;
else
gname = sec->name;
if ((strip_symbols == STRIP_ALL
&& !is_specified_symbol (gname, keep_specific_htab))
|| is_specified_symbol (gname, strip_specific_htab))
return TRUE;
/* Remove the group section if all members are removed. */
first = elt = elf_next_in_group (sec);
while (elt != NULL)
{
if (!is_strip_section_1 (abfd, elt))
return FALSE;
elt = elf_next_in_group (elt);
if (elt == first)
break;
}
return TRUE;
}
return FALSE;
}
static bfd_boolean
is_nondebug_keep_contents_section (bfd *ibfd, asection *isection)
{
/* Always keep ELF note sections. */
if (ibfd->xvec->flavour == bfd_target_elf_flavour)
return (elf_section_type (isection) == SHT_NOTE);
/* Always keep the .buildid section for PE/COFF.
Strictly, this should be written "always keep the section storing the debug
directory", but that may be the .text section for objects produced by some
tools, which it is not sensible to keep. */
if (ibfd->xvec->flavour == bfd_target_coff_flavour)
return (strcmp (bfd_get_section_name (ibfd, isection), ".buildid") == 0);
return FALSE;
}
/* Return true if SYM is a hidden symbol. */
static bfd_boolean
is_hidden_symbol (asymbol *sym)
{
elf_symbol_type *elf_sym;
elf_sym = elf_symbol_from (sym->the_bfd, sym);
if (elf_sym != NULL)
switch (ELF_ST_VISIBILITY (elf_sym->internal_elf_sym.st_other))
{
case STV_HIDDEN:
case STV_INTERNAL:
return TRUE;
}
return FALSE;
}
static bfd_boolean
need_sym_before (struct addsym_node **node, const char *sym)
{
int count;
struct addsym_node *ptr = add_sym_list;
/* 'othersym' symbols are at the front of the list. */
for (count = 0; count < add_symbols; count++)
{
if (!ptr->othersym)
break;
else if (strcmp (ptr->othersym, sym) == 0)
{
free (ptr->othersym);
ptr->othersym = ""; /* Empty name is hopefully never a valid symbol name. */
*node = ptr;
return TRUE;
}
ptr = ptr->next;
}
return FALSE;
}
static asymbol *
create_new_symbol (struct addsym_node *ptr, bfd *obfd)
{
asymbol *sym = bfd_make_empty_symbol (obfd);
bfd_asymbol_name (sym) = ptr->symdef;
sym->value = ptr->symval;
sym->flags = ptr->flags;
if (ptr->section)
{
asection *sec = bfd_get_section_by_name (obfd, ptr->section);
if (!sec)
fatal (_("Section %s not found"), ptr->section);
sym->section = sec;
}
else
sym->section = bfd_abs_section_ptr;
return sym;
}
/* Choose which symbol entries to copy; put the result in OSYMS.
We don't copy in place, because that confuses the relocs.
Return the number of symbols to print. */
static unsigned int
filter_symbols (bfd *abfd, bfd *obfd, asymbol **osyms,
asymbol **isyms, long symcount)
{
asymbol **from = isyms, **to = osyms;
long src_count = 0, dst_count = 0;
int relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
for (; src_count < symcount; src_count++)
{
asymbol *sym = from[src_count];
flagword flags = sym->flags;
char *name = (char *) bfd_asymbol_name (sym);
bfd_boolean keep;
bfd_boolean used_in_reloc = FALSE;
bfd_boolean undefined;
bfd_boolean rem_leading_char;
bfd_boolean add_leading_char;
undefined = bfd_is_und_section (bfd_get_section (sym));
if (add_sym_list)
{
struct addsym_node *ptr;
if (need_sym_before (&ptr, name))
to[dst_count++] = create_new_symbol (ptr, obfd);
}
if (redefine_sym_list || section_rename_list)
{
char *new_name;
new_name = (char *) lookup_sym_redefinition (name);
if (new_name == name
&& (flags & BSF_SECTION_SYM) != 0)
new_name = (char *) find_section_rename (name, NULL);
bfd_asymbol_name (sym) = new_name;
name = new_name;
}
/* Check if we will remove the current leading character. */
rem_leading_char =
(name[0] == bfd_get_symbol_leading_char (abfd))
&& (change_leading_char
|| (remove_leading_char
&& ((flags & (BSF_GLOBAL | BSF_WEAK)) != 0
|| undefined
|| bfd_is_com_section (bfd_get_section (sym)))));
/* Check if we will add a new leading character. */
add_leading_char =
change_leading_char
&& (bfd_get_symbol_leading_char (obfd) != '\0')
&& (bfd_get_symbol_leading_char (abfd) == '\0'
|| (name[0] == bfd_get_symbol_leading_char (abfd)));
/* Short circuit for change_leading_char if we can do it in-place. */
if (rem_leading_char && add_leading_char && !prefix_symbols_string)
{
name[0] = bfd_get_symbol_leading_char (obfd);
bfd_asymbol_name (sym) = name;
rem_leading_char = FALSE;
add_leading_char = FALSE;
}
/* Remove leading char. */
if (rem_leading_char)
bfd_asymbol_name (sym) = ++name;
/* Add new leading char and/or prefix. */
if (add_leading_char || prefix_symbols_string)
{
char *n, *ptr;
ptr = n = (char *) xmalloc (1 + strlen (prefix_symbols_string)
+ strlen (name) + 1);
if (add_leading_char)
*ptr++ = bfd_get_symbol_leading_char (obfd);
if (prefix_symbols_string)
{
strcpy (ptr, prefix_symbols_string);
ptr += strlen (prefix_symbols_string);
}
strcpy (ptr, name);
bfd_asymbol_name (sym) = n;
name = n;
}
if (strip_symbols == STRIP_ALL)
keep = FALSE;
else if ((flags & BSF_KEEP) != 0 /* Used in relocation. */
|| ((flags & BSF_SECTION_SYM) != 0
&& ((*bfd_get_section (sym)->symbol_ptr_ptr)->flags
& BSF_KEEP) != 0))
{
keep = TRUE;
used_in_reloc = TRUE;
}
else if (relocatable /* Relocatable file. */
&& ((flags & (BSF_GLOBAL | BSF_WEAK)) != 0
|| bfd_is_com_section (bfd_get_section (sym))))
keep = TRUE;
else if (bfd_decode_symclass (sym) == 'I')
/* Global symbols in $idata sections need to be retained
even if relocatable is FALSE. External users of the
library containing the $idata section may reference these
symbols. */
keep = TRUE;
else if ((flags & BSF_GLOBAL) != 0 /* Global symbol. */
|| (flags & BSF_WEAK) != 0
|| undefined
|| bfd_is_com_section (bfd_get_section (sym)))
keep = strip_symbols != STRIP_UNNEEDED;
else if ((flags & BSF_DEBUGGING) != 0) /* Debugging symbol. */
keep = (strip_symbols != STRIP_DEBUG
&& strip_symbols != STRIP_UNNEEDED
&& ! convert_debugging);
else if (bfd_coff_get_comdat_section (abfd, bfd_get_section (sym)))
/* COMDAT sections store special information in local
symbols, so we cannot risk stripping any of them. */
keep = TRUE;
else /* Local symbol. */
keep = (strip_symbols != STRIP_UNNEEDED
&& (discard_locals != LOCALS_ALL
&& (discard_locals != LOCALS_START_L
|| ! bfd_is_local_label (abfd, sym))));
if (keep && is_specified_symbol (name, strip_specific_htab))
{
/* There are multiple ways to set 'keep' above, but if it
was the relocatable symbol case, then that's an error. */
if (used_in_reloc)
{
non_fatal (_("not stripping symbol `%s' because it is named in a relocation"), name);
status = 1;
}
else
keep = FALSE;
}
if (keep
&& !(flags & BSF_KEEP)
&& is_specified_symbol (name, strip_unneeded_htab))
keep = FALSE;
if (!keep
&& ((keep_file_symbols && (flags & BSF_FILE))
|| is_specified_symbol (name, keep_specific_htab)))
keep = TRUE;
if (keep && is_strip_section (abfd, bfd_get_section (sym)))
keep = FALSE;
if (keep)
{
if ((flags & BSF_GLOBAL) != 0
&& (weaken || is_specified_symbol (name, weaken_specific_htab)))
{
sym->flags &= ~ BSF_GLOBAL;
sym->flags |= BSF_WEAK;
}
if (!undefined
&& (flags & (BSF_GLOBAL | BSF_WEAK))
&& (is_specified_symbol (name, localize_specific_htab)
|| (htab_elements (keepglobal_specific_htab) != 0
&& ! is_specified_symbol (name, keepglobal_specific_htab))
|| (localize_hidden && is_hidden_symbol (sym))))
{
sym->flags &= ~ (BSF_GLOBAL | BSF_WEAK);
sym->flags |= BSF_LOCAL;
}
if (!undefined
&& (flags & BSF_LOCAL)
&& is_specified_symbol (name, globalize_specific_htab))
{
sym->flags &= ~ BSF_LOCAL;
sym->flags |= BSF_GLOBAL;
}
to[dst_count++] = sym;
}
}
if (add_sym_list)
{
struct addsym_node *ptr = add_sym_list;
for (src_count = 0; src_count < add_symbols; src_count++)
{
if (ptr->othersym)
{
if (strcmp (ptr->othersym, ""))
fatal (_("'before=%s' not found"), ptr->othersym);
}
else
to[dst_count++] = create_new_symbol (ptr, obfd);
ptr = ptr->next;
}
}
to[dst_count] = NULL;
return dst_count;
}
/* Find the redefined name of symbol SOURCE. */
static const char *
lookup_sym_redefinition (const char *source)
{
struct redefine_node *list;
for (list = redefine_sym_list; list != NULL; list = list->next)
if (strcmp (source, list->source) == 0)
return list->target;
return source;
}
/* Add a node to a symbol redefine list. */
static void
redefine_list_append (const char *cause, const char *source, const char *target)
{
struct redefine_node **p;
struct redefine_node *list;
struct redefine_node *new_node;
for (p = &redefine_sym_list; (list = *p) != NULL; p = &list->next)
{
if (strcmp (source, list->source) == 0)
fatal (_("%s: Multiple redefinition of symbol \"%s\""),
cause, source);
if (strcmp (target, list->target) == 0)
fatal (_("%s: Symbol \"%s\" is target of more than one redefinition"),
cause, target);
}
new_node = (struct redefine_node *) xmalloc (sizeof (struct redefine_node));
new_node->source = strdup (source);
new_node->target = strdup (target);
new_node->next = NULL;
*p = new_node;
}
/* Handle the --redefine-syms option. Read lines containing "old new"
from the file, and add them to the symbol redefine list. */
static void
add_redefine_syms_file (const char *filename)
{
FILE *file;
char *buf;
size_t bufsize;
size_t len;
size_t outsym_off;
int c, lineno;
file = fopen (filename, "r");
if (file == NULL)
fatal (_("couldn't open symbol redefinition file %s (error: %s)"),
filename, strerror (errno));
bufsize = 100;
buf = (char *) xmalloc (bufsize + 1 /* For the terminating NUL. */);
lineno = 1;
c = getc (file);
len = 0;
outsym_off = 0;
while (c != EOF)
{
/* Collect the input symbol name. */
while (! IS_WHITESPACE (c) && ! IS_LINE_TERMINATOR (c) && c != EOF)
{
if (c == '#')
goto comment;
buf[len++] = c;
if (len >= bufsize)
{
bufsize *= 2;
buf = (char *) xrealloc (buf, bufsize + 1);
}
c = getc (file);
}
buf[len++] = '\0';
if (c == EOF)
break;
/* Eat white space between the symbol names. */
while (IS_WHITESPACE (c))
c = getc (file);
if (c == '#' || IS_LINE_TERMINATOR (c))
goto comment;
if (c == EOF)
break;
/* Collect the output symbol name. */
outsym_off = len;
while (! IS_WHITESPACE (c) && ! IS_LINE_TERMINATOR (c) && c != EOF)
{
if (c == '#')
goto comment;
buf[len++] = c;
if (len >= bufsize)
{
bufsize *= 2;
buf = (char *) xrealloc (buf, bufsize + 1);
}
c = getc (file);
}
buf[len++] = '\0';
if (c == EOF)
break;
/* Eat white space at end of line. */
while (! IS_LINE_TERMINATOR(c) && c != EOF && IS_WHITESPACE (c))
c = getc (file);
if (c == '#')
goto comment;
/* Handle \r\n. */
if ((c == '\r' && (c = getc (file)) == '\n')
|| c == '\n' || c == EOF)
{
end_of_line:
/* Append the redefinition to the list. */
if (buf[0] != '\0')
redefine_list_append (filename, &buf[0], &buf[outsym_off]);
lineno++;
len = 0;
outsym_off = 0;
if (c == EOF)
break;
c = getc (file);
continue;
}
else
fatal (_("%s:%d: garbage found at end of line"), filename, lineno);
comment:
if (len != 0 && (outsym_off == 0 || outsym_off == len))
fatal (_("%s:%d: missing new symbol name"), filename, lineno);
buf[len++] = '\0';
/* Eat the rest of the line and finish it. */
while (c != '\n' && c != EOF)
c = getc (file);
goto end_of_line;
}
if (len != 0)
fatal (_("%s:%d: premature end of file"), filename, lineno);
free (buf);
}
/* Copy unkown object file IBFD onto OBFD.
Returns TRUE upon success, FALSE otherwise. */
static bfd_boolean
copy_unknown_object (bfd *ibfd, bfd *obfd)
{
char *cbuf;
int tocopy;
long ncopied;
long size;
struct stat buf;
if (bfd_stat_arch_elt (ibfd, &buf) != 0)
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
return FALSE;
}
size = buf.st_size;
if (size < 0)
{
non_fatal (_("stat returns negative size for `%s'"),
bfd_get_archive_filename (ibfd));
return FALSE;
}
if (bfd_seek (ibfd, (file_ptr) 0, SEEK_SET) != 0)
{
bfd_nonfatal (bfd_get_archive_filename (ibfd));
return FALSE;
}
if (verbose)
printf (_("copy from `%s' [unknown] to `%s' [unknown]\n"),
bfd_get_archive_filename (ibfd), bfd_get_filename (obfd));
cbuf = (char *) xmalloc (BUFSIZE);
ncopied = 0;
while (ncopied < size)
{
tocopy = size - ncopied;
if (tocopy > BUFSIZE)
tocopy = BUFSIZE;
if (bfd_bread (cbuf, (bfd_size_type) tocopy, ibfd)
!= (bfd_size_type) tocopy)
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
free (cbuf);
return FALSE;
}
if (bfd_bwrite (cbuf, (bfd_size_type) tocopy, obfd)
!= (bfd_size_type) tocopy)
{
bfd_nonfatal_message (NULL, obfd, NULL, NULL);
free (cbuf);
return FALSE;
}
ncopied += tocopy;
}
/* We should at least to be able to read it back when copying an
unknown object in an archive. */
chmod (bfd_get_filename (obfd), buf.st_mode | S_IRUSR);
free (cbuf);
return TRUE;
}
/* Copy object file IBFD onto OBFD.
Returns TRUE upon success, FALSE otherwise. */
static bfd_boolean
copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch)
{
bfd_vma start;
long symcount;
asection **osections = NULL;
asection *gnu_debuglink_section = NULL;
bfd_size_type *gaps = NULL;
bfd_size_type max_gap = 0;
long symsize;
void *dhandle;
enum bfd_architecture iarch;
unsigned int imach;
unsigned int c, i;
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
&& ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
{
/* PR 17636: Call non-fatal so that we return to our parent who
may need to tidy temporary files. */
non_fatal (_("Unable to change endianness of input file(s)"));
return FALSE;
}
if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
{
bfd_nonfatal_message (NULL, obfd, NULL, NULL);
return FALSE;
}
if (ibfd->sections == NULL)
{
non_fatal (_("error: the input file '%s' has no sections"),
bfd_get_archive_filename (ibfd));
return FALSE;
}
if (ibfd->xvec->flavour != bfd_target_elf_flavour)
{
if ((do_debug_sections & compress) != 0
&& do_debug_sections != compress)
{
non_fatal (_("--compress-debug-sections=[zlib|zlib-gnu|zlib-gabi] is unsupported on `%s'"),
bfd_get_archive_filename (ibfd));
return FALSE;
}
if (do_elf_stt_common)
{
non_fatal (_("--elf-stt-common=[yes|no] is unsupported on `%s'"),
bfd_get_archive_filename (ibfd));
return FALSE;
}
}
if (verbose)
printf (_("copy from `%s' [%s] to `%s' [%s]\n"),
bfd_get_archive_filename (ibfd), bfd_get_target (ibfd),
bfd_get_filename (obfd), bfd_get_target (obfd));
if (extract_symbol)
start = 0;
else
{
if (set_start_set)
start = set_start;
else
start = bfd_get_start_address (ibfd);
start += change_start;
}
/* Neither the start address nor the flags
need to be set for a core file. */
if (bfd_get_format (obfd) != bfd_core)
{
flagword flags;
flags = bfd_get_file_flags (ibfd);
flags |= bfd_flags_to_set;
flags &= ~bfd_flags_to_clear;
flags &= bfd_applicable_file_flags (obfd);
if (strip_symbols == STRIP_ALL)
flags &= ~HAS_RELOC;
if (!bfd_set_start_address (obfd, start)
|| !bfd_set_file_flags (obfd, flags))
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
return FALSE;
}
}
/* Copy architecture of input file to output file. */
iarch = bfd_get_arch (ibfd);
imach = bfd_get_mach (ibfd);
if (input_arch)
{
if (bfd_get_arch_info (ibfd) == NULL
|| bfd_get_arch_info (ibfd)->arch == bfd_arch_unknown)
{
iarch = input_arch->arch;
imach = input_arch->mach;
}
else
non_fatal (_("Input file `%s' ignores binary architecture parameter."),
bfd_get_archive_filename (ibfd));
}
if (!bfd_set_arch_mach (obfd, iarch, imach)
&& (ibfd->target_defaulted
|| bfd_get_arch (ibfd) != bfd_get_arch (obfd)))
{
if (bfd_get_arch (ibfd) == bfd_arch_unknown)
non_fatal (_("Unable to recognise the format of the input file `%s'"),
bfd_get_archive_filename (ibfd));
else
non_fatal (_("Output file cannot represent architecture `%s'"),
bfd_printable_arch_mach (bfd_get_arch (ibfd),
bfd_get_mach (ibfd)));
return FALSE;
}
if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
return FALSE;
}
if (bfd_get_flavour (obfd) == bfd_target_coff_flavour
&& bfd_pei_p (obfd))
{
/* Set up PE parameters. */
pe_data_type *pe = pe_data (obfd);
/* Copy PE parameters before changing them. */
if (ibfd->xvec->flavour == bfd_target_coff_flavour
&& bfd_pei_p (ibfd))
pe->pe_opthdr = pe_data (ibfd)->pe_opthdr;
if (pe_file_alignment != (bfd_vma) -1)
pe->pe_opthdr.FileAlignment = pe_file_alignment;
else
pe_file_alignment = PE_DEF_FILE_ALIGNMENT;
if (pe_heap_commit != (bfd_vma) -1)
pe->pe_opthdr.SizeOfHeapCommit = pe_heap_commit;
if (pe_heap_reserve != (bfd_vma) -1)
pe->pe_opthdr.SizeOfHeapCommit = pe_heap_reserve;
if (pe_image_base != (bfd_vma) -1)
pe->pe_opthdr.ImageBase = pe_image_base;
if (pe_section_alignment != (bfd_vma) -1)
pe->pe_opthdr.SectionAlignment = pe_section_alignment;
else
pe_section_alignment = PE_DEF_SECTION_ALIGNMENT;
if (pe_stack_commit != (bfd_vma) -1)
pe->pe_opthdr.SizeOfStackCommit = pe_stack_commit;
if (pe_stack_reserve != (bfd_vma) -1)
pe->pe_opthdr.SizeOfStackCommit = pe_stack_reserve;
if (pe_subsystem != -1)
pe->pe_opthdr.Subsystem = pe_subsystem;
if (pe_major_subsystem_version != -1)
pe->pe_opthdr.MajorSubsystemVersion = pe_major_subsystem_version;
if (pe_minor_subsystem_version != -1)
pe->pe_opthdr.MinorSubsystemVersion = pe_minor_subsystem_version;
if (pe_file_alignment > pe_section_alignment)
{
char file_alignment[20], section_alignment[20];
sprintf_vma (file_alignment, pe_file_alignment);
sprintf_vma (section_alignment, pe_section_alignment);
non_fatal (_("warning: file alignment (0x%s) > section alignment (0x%s)"),
file_alignment, section_alignment);
}
}
if (isympp)
free (isympp);
if (osympp != isympp)
free (osympp);
isympp = NULL;
osympp = NULL;
symsize = bfd_get_symtab_upper_bound (ibfd);
if (symsize < 0)
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
return FALSE;
}
osympp = isympp = (asymbol **) xmalloc (symsize);
symcount = bfd_canonicalize_symtab (ibfd, isympp);
if (symcount < 0)
{
bfd_nonfatal_message (NULL, ibfd, NULL, NULL);
return FALSE;
}
/* PR 17512: file: d6323821
If the symbol table could not be loaded do not pretend that we have
any symbols. This trips us up later on when we load the relocs. */
if (symcount == 0)
{
free (isympp);
osympp = isympp = NULL;
}
/* BFD mandates that all output sections be created and sizes set before
any output is done. Thus, we traverse all sections multiple times. */
bfd_map_over_sections (ibfd, setup_section, obfd);
if (!extract_symbol)
setup_bfd_headers (ibfd, obfd);
if (add_sections != NULL)
{
struct section_add *padd;
struct section_list *pset;
for (padd = add_sections; padd != NULL; padd = padd->next)
{
flagword flags;
pset = find_section_list (padd->name, FALSE,
SECTION_CONTEXT_SET_FLAGS);
if (pset != NULL)
flags = pset->flags | SEC_HAS_CONTENTS;
else
flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DATA;
/* bfd_make_section_with_flags() does not return very helpful
error codes, so check for the most likely user error first. */
if (bfd_get_section_by_name (obfd, padd->name))
{
bfd_nonfatal_message (NULL, obfd, NULL,
_("can't add section '%s'"), padd->name);
return FALSE;
}
else
{
/* We use LINKER_CREATED here so that the backend hooks
will create any special section type information,
instead of presuming we know what we're doing merely
because we set the flags. */
padd->section = bfd_make_section_with_flags
(obfd, padd->name, flags | SEC_LINKER_CREATED);
if (padd->section == NULL)
{
bfd_nonfatal_message (NULL, obfd, NULL,
_("can't create section `%s'"),
padd->name);
return FALSE;
}
}
if (! bfd_set_section_size (obfd, padd->section, padd->size))
{
bfd_nonfatal_message (NULL, obfd, padd->section, NULL);
return FALSE;
}
pset = find_section_list (padd->name, FALSE,
SECTION_CONTEXT_SET_VMA | SECTION_CONTEXT_ALTER_VMA);
if (pset != NULL
&& ! bfd_set_section_vma (obfd, padd->section, pset->vma_val))
{
bfd_nonfatal_message (NULL, obfd, padd->section, NULL);
return FALSE;
}
pset = find_section_list (padd->name, FALSE,
SECTION_CONTEXT_SET_LMA | SECTION_CONTEXT_ALTER_LMA);
if (pset != NULL)
{
padd->section->lma = pset->lma_val;
if (! bfd_set_section_alignment
(obfd, padd->section,
bfd_section_alignment (obfd, padd->section)))
{
bfd_nonfatal_message (NULL, obfd, padd->section, NULL);
return FALSE;
}
}
}
}
if (update_sections != NULL)
{
struct section_add *pupdate;
for (pupdate = update_sections;
pupdate != NULL;
pupdate = pupdate->next)
{
asection *osec;
pupdate->section = bfd_get_section_by_name (ibfd, pupdate->name);
if (pupdate->section == NULL)
{
non_fatal (_("error: %s not found, can't be updated"), pupdate->name);
return FALSE;
}
osec = pupdate->section->output_section;
if (! bfd_set_section_size (obfd, osec, pupdate->size))
{
bfd_nonfatal_message (NULL, obfd, osec, NULL);
return FALSE;
}
}
}
if (dump_sections != NULL)
{
struct section_add * pdump;
for (pdump = dump_sections; pdump != NULL; pdump = pdump->next)
{
asection * sec;
sec = bfd_get_section_by_name (ibfd, pdump->name);
if (sec == NULL)
{
bfd_nonfatal_message (NULL, ibfd, NULL,
_("can't dump section '%s' - it does not exist"),
pdump->name);
continue;
}
if ((bfd_get_section_flags (ibfd, sec) & SEC_HAS_CONTENTS) == 0)
{
bfd_nonfatal_message (NULL, ibfd, sec,
_("can't dump section - it has no contents"));
continue;
}
bfd_size_type size = bfd_get_section_size (sec);
if (size == 0)
{
bfd_nonfatal_message (NULL, ibfd, sec,
_("can't dump section - it is empty"));
continue;
}
FILE * f;
f = fopen (pdump->filename, FOPEN_WB);
if (f == NULL)
{
bfd_nonfatal_message (pdump->filename, NULL, NULL,
_("could not open section dump file"));
continue;
}
bfd_byte * contents = xmalloc (size);
if (bfd_get_section_contents (ibfd, sec, contents, 0, size))
{
if (fwrite (contents, 1, size, f) != size)
{
non_fatal (_("error writing section contents to %s (error: %s)"),
pdump->filename,
strerror (errno));
return FALSE;
}
}
else
bfd_nonfatal_message (NULL, ibfd, sec,
_("could not retrieve section contents"));
fclose (f);
free (contents);
}
}
if (gnu_debuglink_filename != NULL)
{
/* PR 15125: Give a helpful warning message if
the debuglink section already exists, and
allow the rest of the copy to complete. */
if (bfd_get_section_by_name (obfd, ".gnu_debuglink"))
{
non_fatal (_("%s: debuglink section already exists"),
bfd_get_filename (obfd));
gnu_debuglink_filename = NULL;
}
else
{
gnu_debuglink_section = bfd_create_gnu_debuglink_section
(obfd, gnu_debuglink_filename);
if (gnu_debuglink_section == NULL)
{
bfd_nonfatal_message (NULL, obfd, NULL,
_("cannot create debug link section `%s'"),
gnu_debuglink_filename);
return FALSE;
}
/* Special processing for PE format files. We
have no way to distinguish PE from COFF here. */
if (bfd_get_flavour (obfd) == bfd_target_coff_flavour)
{
bfd_vma debuglink_vma;
asection * highest_section;
asection * sec;
/* The PE spec requires that all sections be adjacent and sorted
in ascending order of VMA. It also specifies that debug
sections should be last. This is despite the fact that debug
sections are not loaded into memory and so in theory have no
use for a VMA.
This means that the debuglink section must be given a non-zero
VMA which makes it contiguous with other debug sections. So
walk the current section list, find the section with the
highest VMA and start the debuglink section after that one. */
for (sec = obfd->sections, highest_section = NULL;
sec != NULL;
sec = sec->next)
if (sec->vma > 0
&& (highest_section == NULL
|| sec->vma > highest_section->vma))
highest_section = sec;
if (highest_section)
debuglink_vma = BFD_ALIGN (highest_section->vma
+ highest_section->size,
/* FIXME: We ought to be using
COFF_PAGE_SIZE here or maybe
bfd_get_section_alignment() (if it
was set) but since this is for PE
and we know the required alignment
it is easier just to hard code it. */
0x1000);
else
/* Umm, not sure what to do in this case. */
debuglink_vma = 0x1000;
bfd_set_section_vma (obfd, gnu_debuglink_section, debuglink_vma);
}
}
}
c = bfd_count_sections (obfd);
if (c != 0
&& (gap_fill_set || pad_to_set))
{
asection **set;
/* We must fill in gaps between the sections and/or we must pad
the last section to a specified address. We do this by
grabbing a list of the sections, sorting them by VMA, and
increasing the section sizes as required to fill the gaps.
We write out the gap contents below. */
osections = (asection **) xmalloc (c * sizeof (asection *));
set = osections;
bfd_map_over_sections (obfd, get_sections, &set);
qsort (osections, c, sizeof (asection *), compare_section_lma);
gaps = (bfd_size_type *) xmalloc (c * sizeof (bfd_size_type));
memset (gaps, 0, c * sizeof (bfd_size_type));
if (gap_fill_set)
{
for (i = 0; i < c - 1; i++)
{
flagword flags;
bfd_size_type size;
bfd_vma gap_start, gap_stop;
flags = bfd_get_section_flags (obfd, osections[i]);
if ((flags & SEC_HAS_CONTENTS) == 0
|| (flags & SEC_LOAD) == 0)
continue;
size = bfd_section_size (obfd, osections[i]);
gap_start = bfd_section_lma (obfd, osections[i]) + size;
gap_stop = bfd_section_lma (obfd, osections[i + 1]);
if (gap_start < gap_stop)
{
if (! bfd_set_section_size (obfd, osections[i],
size + (gap_stop - gap_start)))
{
bfd_nonfatal_message (NULL, obfd, osections[i],
_("Can't fill gap after section"));
status = 1;
break;
}
gaps[i] = gap_stop - gap_start;
if (max_gap < gap_stop - gap_start)
max_gap = gap_stop - gap_start;
}
}
}
if (pad_to_set)
{
bfd_vma lma;
bfd_size_type size;
lma = bfd_section_lma (obfd, osections[c - 1]);
size = bfd_section_size (obfd, osections[c - 1]);
if (lma + size < pad_to)
{
if (! bfd_set_section_size (obfd, osections[c - 1],
pad_to - lma))
{
bfd_nonfatal_message (NULL, obfd, osections[c - 1],
_("can't add padding"));
status = 1;
}
else
{
gaps[c - 1] = pad_to - (lma + size);
if (max_gap < pad_to - (lma + size))
max_gap = pad_to - (lma + size);
}
}
}
}
/* Symbol filtering must happen after the output sections
have been created, but before their contents are set. */
dhandle = NULL;
if (convert_debugging)
dhandle = read_debugging_info (ibfd, isympp, symcount, FALSE);
if (strip_symbols == STRIP_DEBUG
|| strip_symbols == STRIP_ALL
|| strip_symbols == STRIP_UNNEEDED
|| strip_symbols == STRIP_NONDEBUG
|| strip_symbols == STRIP_DWO
|| strip_symbols == STRIP_NONDWO
|| discard_locals != LOCALS_UNDEF
|| localize_hidden
|| htab_elements (strip_specific_htab) != 0
|| htab_elements (keep_specific_htab) != 0
|| htab_elements (localize_specific_htab) != 0
|| htab_elements (globalize_specific_htab) != 0
|| htab_elements (keepglobal_specific_htab) != 0
|| htab_elements (weaken_specific_htab) != 0
|| prefix_symbols_string
|| sections_removed
|| sections_copied
|| convert_debugging
|| change_leading_char
|| remove_leading_char
|| redefine_sym_list
|| section_rename_list
|| weaken
|| add_symbols)
{
/* Mark symbols used in output relocations so that they
are kept, even if they are local labels or static symbols.
Note we iterate over the input sections examining their
relocations since the relocations for the output sections
haven't been set yet. mark_symbols_used_in_relocations will
ignore input sections which have no corresponding output
section. */
if (strip_symbols != STRIP_ALL)
bfd_map_over_sections (ibfd,
mark_symbols_used_in_relocations,
isympp);
osympp = (asymbol **) xmalloc ((symcount + add_symbols + 1) * sizeof (asymbol *));
symcount = filter_symbols (ibfd, obfd, osympp, isympp, symcount);
}
if (convert_debugging && dhandle != NULL)
{
if (! write_debugging_info (obfd, dhandle, &symcount, &osympp))
{
status = 1;
return FALSE;
}
}
bfd_set_symtab (obfd, osympp, symcount);
/* This has to happen before section positions are set. */
bfd_map_over_sections (ibfd, copy_relocations_in_section, obfd);
/* This has to happen after the symbol table has been set. */
bfd_map_over_sections (ibfd, copy_section, obfd);
if (add_sections != NULL)
{
struct section_add *padd;
for (padd = add_sections; padd != NULL; padd = padd->next)
{
if (! bfd_set_section_contents (obfd, padd->section, padd->contents,
0, padd->size))
{
bfd_nonfatal_message (NULL, obfd, padd->section, NULL);
return FALSE;
}
}
}
if (update_sections != NULL)
{
struct section_add *pupdate;
for (pupdate = update_sections;
pupdate != NULL;
pupdate = pupdate->next)
{
asection *osec;
osec = pupdate->section->output_section;
if (! bfd_set_section_contents (obfd, osec, pupdate->contents,
0, pupdate->size))
{
bfd_nonfatal_message (NULL, obfd, osec, NULL);
return FALSE;
}
}
}
if (gnu_debuglink_filename != NULL)
{
if (! bfd_fill_in_gnu_debuglink_section
(obfd, gnu_debuglink_section, gnu_debuglink_filename))
{
bfd_nonfatal_message (NULL, obfd, NULL,
_("cannot fill debug link section `%s'"),
gnu_debuglink_filename);
return FALSE;
}
}
if (gap_fill_set || pad_to_set)
{
bfd_byte *buf;
/* Fill in the gaps. */
if (max_gap > 8192)
max_gap = 8192;
buf = (bfd_byte *) xmalloc (max_gap);
memset (buf, gap_fill, max_gap);
c = bfd_count_sections (obfd);
for (i = 0; i < c; i++)
{
if (gaps[i] != 0)
{
bfd_size_type left;
file_ptr off;
left = gaps[i];
off = bfd_section_size (obfd, osections[i]) - left;
while (left > 0)
{
bfd_size_type now;
if (left > 8192)
now = 8192;
else
now = left;
if (! bfd_set_section_contents (obfd, osections[i], buf,
off, now))
{
bfd_nonfatal_message (NULL, obfd, osections[i], NULL);
return FALSE;
}
left -= now;
off += now;
}
}
}
}
/* Allow the BFD backend to copy any private data it understands
from the input BFD to the output BFD. This is done last to
permit the routine to look at the filtered symbol table, which is
important for the ECOFF code at least. */
if (! bfd_copy_private_bfd_data (ibfd, obfd))
{
bfd_nonfatal_message (NULL, obfd, NULL,
_("error copying private BFD data"));
return FALSE;
}
/* Switch to the alternate machine code. We have to do this at the
very end, because we only initialize the header when we create
the first section. */
if (use_alt_mach_code != 0)
{
if (! bfd_alt_mach_code (obfd, use_alt_mach_code))
{
non_fatal (_("this target does not support %lu alternative machine codes"),
use_alt_mach_code);
if (bfd_get_flavour (obfd) == bfd_target_elf_flavour)
{
non_fatal (_("treating that number as an absolute e_machine value instead"));
elf_elfheader (obfd)->e_machine = use_alt_mach_code;
}
else
non_fatal (_("ignoring the alternative value"));
}
}
return TRUE;
}
/* Read each archive element in turn from IBFD, copy the
contents to temp file, and keep the temp file handle.
If 'force_output_target' is TRUE then make sure that
all elements in the new archive are of the type
'output_target'. */
static void
copy_archive (bfd *ibfd, bfd *obfd, const char *output_target,
bfd_boolean force_output_target,
const bfd_arch_info_type *input_arch)
{
struct name_list
{
struct name_list *next;
const char *name;
bfd *obfd;
} *list, *l;
bfd **ptr = &obfd->archive_head;
bfd *this_element;
char *dir;
const char *filename;
/* Make a temp directory to hold the contents. */
dir = make_tempdir (bfd_get_filename (obfd));
if (dir == NULL)
fatal (_("cannot create tempdir for archive copying (error: %s)"),
strerror (errno));
if (strip_symbols == STRIP_ALL)
obfd->has_armap = FALSE;
else
obfd->has_armap = ibfd->has_armap;
obfd->is_thin_archive = ibfd->is_thin_archive;
if (deterministic)
obfd->flags |= BFD_DETERMINISTIC_OUTPUT;
list = NULL;
this_element = bfd_openr_next_archived_file (ibfd, NULL);
if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
{
status = 1;
bfd_nonfatal_message (NULL, obfd, NULL, NULL);
goto cleanup_and_exit;
}
while (!status && this_element != NULL)
{
char *output_name;
bfd *output_bfd;
bfd *last_element;
struct stat buf;
int stat_status = 0;
bfd_boolean del = TRUE;
bfd_boolean ok_object;
/* PR binutils/17533: Do not allow directory traversal
outside of the current directory tree by archive members. */
if (! is_valid_archive_path (bfd_get_filename (this_element)))
{
non_fatal (_("illegal pathname found in archive member: %s"),
bfd_get_filename (this_element));
status = 1;
goto cleanup_and_exit;
}
/* Create an output file for this member. */
output_name = concat (dir, "/",
bfd_get_filename (this_element), (char *) 0);
/* If the file already exists, make another temp dir. */
if (stat (output_name, &buf) >= 0)
{
output_name = make_tempdir (output_name);
if (output_name == NULL)
{
non_fatal (_("cannot create tempdir for archive copying (error: %s)"),
strerror (errno));
status = 1;
goto cleanup_and_exit;
}
l = (struct name_list *) xmalloc (sizeof (struct name_list));
l->name = output_name;
l->next = list;
l->obfd = NULL;
list = l;
output_name = concat (output_name, "/",
bfd_get_filename (this_element), (char *) 0);
}
if (preserve_dates)
{
stat_status = bfd_stat_arch_elt (this_element, &buf);
if (stat_status != 0)
non_fatal (_("internal stat error on %s"),
bfd_get_filename (this_element));
}
l = (struct name_list *) xmalloc (sizeof (struct name_list));
l->name = output_name;
l->next = list;
l->obfd = NULL;
list = l;
ok_object = bfd_check_format (this_element, bfd_object);
if (!ok_object)
bfd_nonfatal_message (NULL, this_element, NULL,
_("Unable to recognise the format of file"));
/* PR binutils/3110: Cope with archives
containing multiple target types. */
if (force_output_target || !ok_object)
output_bfd = bfd_openw (output_name, output_target);
else
output_bfd = bfd_openw (output_name, bfd_get_target (this_element));
if (output_bfd == NULL)
{
bfd_nonfatal_message (output_name, NULL, NULL, NULL);
status = 1;
goto cleanup_and_exit;
}
if (ok_object)
{
del = !copy_object (this_element, output_bfd, input_arch);
if (del && bfd_get_arch (this_element) == bfd_arch_unknown)
/* Try again as an unknown object file. */
ok_object = FALSE;
else if (!bfd_close (output_bfd))
{
bfd_nonfatal_message (output_name, NULL, NULL, NULL);
/* Error in new object file. Don't change archive. */
status = 1;
}
}
if (!ok_object)
{
del = !copy_unknown_object (this_element, output_bfd);
if (!bfd_close_all_done (output_bfd))
{
bfd_nonfatal_message (output_name, NULL, NULL, NULL);
/* Error in new object file. Don't change archive. */
status = 1;
}
}
if (del)
{
unlink (output_name);
status = 1;
}
else
{
if (preserve_dates && stat_status == 0)