Add --redefine-sym to objcopy.
This commit is contained in:
Alan Modra
parent
c7e79b4bee
commit
57938635f5
5 changed files with 258 additions and 64 deletions
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@ -38,6 +38,14 @@ struct symlist
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struct symlist *next;
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};
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/* A list to support redefine_sym. */
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struct redefine_node
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{
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char *source;
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char *target;
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struct redefine_node *next;
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};
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static void copy_usage PARAMS ((FILE *, int));
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static void strip_usage PARAMS ((FILE *, int));
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static flagword parse_flags PARAMS ((const char *));
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@ -60,6 +68,8 @@ static void copy_file
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PARAMS ((const char *, const char *, const char *, const char *));
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static int strip_main PARAMS ((int, char **));
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static int copy_main PARAMS ((int, char **));
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static const char *lookup_sym_redefinition PARAMS((const char *));
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static void redefine_list_append PARAMS ((const char *, const char *));
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#define RETURN_NONFATAL(s) {bfd_nonfatal (s); status = 1; return;}
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@ -172,12 +182,13 @@ static boolean change_leading_char = false;
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static boolean remove_leading_char = false;
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/* List of symbols to strip, keep, localize, and weaken. */
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/* List of symbols to strip, keep, localize, weaken, or redefine. */
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static struct symlist *strip_specific_list = NULL;
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static struct symlist *keep_specific_list = NULL;
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static struct symlist *localize_specific_list = NULL;
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static struct symlist *weaken_specific_list = NULL;
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static struct redefine_node *redefine_sym_list = NULL;
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/* If this is true, we weaken global symbols (set BSF_WEAK). */
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@ -202,6 +213,7 @@ static boolean weaken = false;
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#define OPTION_SET_START (OPTION_SET_SECTION_FLAGS + 1)
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#define OPTION_STRIP_UNNEEDED (OPTION_SET_START + 1)
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#define OPTION_WEAKEN (OPTION_STRIP_UNNEEDED + 1)
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#define OPTION_REDEFINE_SYM (OPTION_WEAKEN + 1)
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/* Options to handle if running as "strip". */
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@ -276,6 +288,7 @@ static struct option copy_options[] =
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{"version", no_argument, 0, 'V'},
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{"weaken", no_argument, 0, OPTION_WEAKEN},
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{"weaken-symbol", required_argument, 0, 'W'},
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{"redefine-sym", required_argument, 0, OPTION_REDEFINE_SYM},
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{0, no_argument, 0, 0}
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};
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@ -335,6 +348,7 @@ copy_usage (stream, exit_status)
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--add-section <name>=<file> Add section <name> found in <file> to output\n\
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--change-leading-char Force output format's leading character style\n\
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--remove-leading-char Remove leading character from global symbols\n\
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--redefine-sym <old>=<new> Redefine symbol name <old> to <new>\n\
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-v --verbose List all object files modified\n\
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-V --version Display this program's version number\n\
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-h --help Display this output\n\
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@ -423,7 +437,8 @@ parse_flags (s)
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strncpy (copy, s, len);
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copy[len] = '\0';
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non_fatal (_("unrecognized section flag `%s'"), copy);
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fatal (_("supported flags: alloc, load, noload, readonly, debug, code, data, rom, share, contents"));
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fatal (_("supported flags: %s"),
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"alloc, load, noload, readonly, debug, code, data, rom, share, contents");
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}
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s = snext;
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@ -469,7 +484,7 @@ find_section_list (name, add)
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/* Add a symbol to strip_specific_list. */
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static void
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static void
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add_specific_symbol (name, list)
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const char *name;
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struct symlist **list;
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@ -549,6 +564,15 @@ filter_symbols (abfd, obfd, osyms, isyms, symcount)
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const char *name = bfd_asymbol_name (sym);
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int keep;
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if (redefine_sym_list)
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{
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const char *old_name, *new_name;
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old_name = bfd_asymbol_name (sym);
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new_name = lookup_sym_redefinition (old_name);
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name = bfd_asymbol_name (sym) = new_name;
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}
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if (change_leading_char
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&& (bfd_get_symbol_leading_char (abfd)
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!= bfd_get_symbol_leading_char (obfd))
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@ -630,6 +654,64 @@ filter_symbols (abfd, obfd, osyms, isyms, symcount)
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return dst_count;
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}
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static const char *
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lookup_sym_redefinition (source)
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const char *source;
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{
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const char *result;
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struct redefine_node *list;
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result = source;
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for (list = redefine_sym_list; list != NULL; list = list->next)
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{
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if (strcmp (source, list->source) == 0)
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{
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result = list->target;
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break;
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}
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}
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return result;
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}
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/* Add a node to a symbol redefine list */
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static void
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redefine_list_append (source, target)
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const char *source;
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const char *target;
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{
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struct redefine_node **p;
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struct redefine_node *list;
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struct redefine_node *new_node;
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for (p = &redefine_sym_list; (list = *p) != NULL; p = &list->next)
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{
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if (strcmp (source, list->source) == 0)
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{
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fatal (_("%s: Multiple redefinition of symbol \"%s\""),
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"--redefine-sym",
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source);
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}
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if (strcmp (target, list->target) == 0)
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{
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fatal (_("%s: Symbol \"%s\" is target of more than one redefinition"),
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"--redefine-sym",
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target);
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}
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}
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new_node = (struct redefine_node *) xmalloc (sizeof (struct redefine_node));
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new_node->source = strdup (source);
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new_node->target = strdup (target);
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new_node->next = NULL;
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*p = new_node;
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}
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/* Keep only every `copy_byte'th byte in MEMHUNK, which is *SIZE bytes long.
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Adjust *SIZE. */
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@ -690,13 +772,13 @@ copy_object (ibfd, obfd)
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non_fatal (_("Warning: Output file cannot represent architecture %s"),
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bfd_printable_arch_mach (bfd_get_arch (ibfd),
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bfd_get_mach (ibfd)));
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if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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if (isympp)
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free (isympp);
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if (osympp != isympp)
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free (osympp);
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@ -722,7 +804,7 @@ copy_object (ibfd, obfd)
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else
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{
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flagword flags;
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if (! bfd_set_section_size (obfd, padd->section, padd->size))
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RETURN_NONFATAL (bfd_get_filename (obfd));
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@ -734,7 +816,7 @@ copy_object (ibfd, obfd)
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flags = pset->flags | SEC_HAS_CONTENTS;
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else
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flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DATA;
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if (! bfd_set_section_flags (obfd, padd->section, flags))
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RETURN_NONFATAL (bfd_get_filename (obfd));
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@ -743,11 +825,11 @@ copy_object (ibfd, obfd)
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if (pset->change_vma != CHANGE_IGNORE)
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if (! bfd_set_section_vma (obfd, padd->section, pset->vma_val))
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RETURN_NONFATAL (bfd_get_filename (obfd));
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if (pset->change_lma != CHANGE_IGNORE)
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{
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padd->section->lma = pset->lma_val;
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if (! bfd_set_section_alignment
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(obfd, padd->section,
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bfd_section_alignment (obfd, padd->section)))
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@ -846,16 +928,16 @@ copy_object (ibfd, obfd)
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symsize = bfd_get_symtab_upper_bound (ibfd);
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if (symsize < 0)
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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osympp = isympp = (asymbol **) xmalloc (symsize);
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symcount = bfd_canonicalize_symtab (ibfd, isympp);
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if (symcount < 0)
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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if (convert_debugging)
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dhandle = read_debugging_info (ibfd, isympp, symcount);
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if (strip_symbols == STRIP_DEBUG
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if (strip_symbols == STRIP_DEBUG
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|| strip_symbols == STRIP_ALL
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|| strip_symbols == STRIP_UNNEEDED
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|| discard_locals != LOCALS_UNDEF
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@ -868,11 +950,12 @@ copy_object (ibfd, obfd)
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|| convert_debugging
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|| change_leading_char
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|| remove_leading_char
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|| redefine_sym_list
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|| weaken)
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{
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/* Mark symbols used in output relocations so that they
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are kept, even if they are local labels or static symbols.
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Note we iterate over the input sections examining their
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relocations since the relocations for the output sections
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haven't been set yet. mark_symbols_used_in_relocations will
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@ -1135,13 +1218,13 @@ copy_file (input_filename, output_filename, input_target, output_target)
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else
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{
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bfd_nonfatal (input_filename);
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if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
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{
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list_matching_formats (matching);
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free (matching);
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}
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status = 1;
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}
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}
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@ -1182,7 +1265,7 @@ setup_section (ibfd, isection, obfdarg)
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return;
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osection = bfd_make_section_anyway (obfd, bfd_section_name (ibfd, isection));
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if (osection == NULL)
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{
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err = "making";
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@ -1197,7 +1280,7 @@ setup_section (ibfd, isection, obfdarg)
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err = "size";
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goto loser;
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}
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vma = bfd_section_vma (ibfd, isection);
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if (p != NULL && p->change_vma == CHANGE_MODIFY)
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vma += p->vma_val;
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@ -1205,7 +1288,7 @@ setup_section (ibfd, isection, obfdarg)
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vma = p->vma_val;
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else
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vma += change_section_address;
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if (! bfd_set_section_vma (obfd, osection, vma))
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{
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err = "vma";
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@ -1224,7 +1307,7 @@ setup_section (ibfd, isection, obfdarg)
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}
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else
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lma += change_section_address;
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osection->lma = lma;
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/* FIXME: This is probably not enough. If we change the LMA we
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@ -1294,7 +1377,7 @@ copy_section (ibfd, isection, obfdarg)
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complaints now. */
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if (status != 0)
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return;
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if ((bfd_get_section_flags (ibfd, isection) & SEC_DEBUGGING) != 0
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&& (strip_symbols == STRIP_DEBUG
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|| strip_symbols == STRIP_UNNEEDED
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@ -1322,7 +1405,7 @@ copy_section (ibfd, isection, obfdarg)
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relsize = bfd_get_reloc_upper_bound (ibfd, isection);
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if (relsize < 0)
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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if (relsize == 0)
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bfd_set_reloc (obfd, osection, (arelent **) NULL, 0);
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else
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@ -1331,7 +1414,7 @@ copy_section (ibfd, isection, obfdarg)
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relcount = bfd_canonicalize_reloc (ibfd, isection, relpp, isympp);
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if (relcount < 0)
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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if (strip_symbols == STRIP_ALL)
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{
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/* Remove relocations which are not in
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@ -1339,7 +1422,7 @@ copy_section (ibfd, isection, obfdarg)
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arelent **temp_relpp;
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long temp_relcount = 0;
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long i;
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temp_relpp = (arelent **) xmalloc (relsize);
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for (i = 0; i < relcount; i++)
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if (is_specified_symbol
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@ -1353,7 +1436,7 @@ copy_section (ibfd, isection, obfdarg)
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bfd_set_reloc (obfd, osection,
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(relcount == 0 ? (arelent **) NULL : relpp), relcount);
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}
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isection->_cooked_size = isection->_raw_size;
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isection->reloc_done = true;
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@ -1365,7 +1448,7 @@ copy_section (ibfd, isection, obfdarg)
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size))
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RETURN_NONFATAL (bfd_get_filename (ibfd));
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if (copy_byte >= 0)
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if (copy_byte >= 0)
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filter_bytes (memhunk, &size);
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if (!bfd_set_section_contents (obfd, osection, memhunk, (file_ptr) 0,
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@ -1720,22 +1803,27 @@ copy_main (argc, argv)
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if (copy_byte < 0)
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fatal (_("byte number must be non-negative"));
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break;
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case 'i':
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interleave = atoi (optarg);
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if (interleave < 1)
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fatal (_("interleave must be positive"));
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break;
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case 'I':
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case 's': /* "source" - 'I' is preferred */
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input_target = optarg;
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break;
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case 'O':
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case 'd': /* "destination" - 'O' is preferred */
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output_target = optarg;
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break;
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case 'F':
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input_target = output_target = optarg;
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break;
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case 'j':
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p = find_section_list (optarg, true);
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if (p->remove)
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@ -1743,6 +1831,7 @@ copy_main (argc, argv)
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p->copy = true;
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sections_copied = true;
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break;
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case 'R':
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p = find_section_list (optarg, true);
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if (p->copy)
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@ -1750,45 +1839,59 @@ copy_main (argc, argv)
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p->remove = true;
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sections_removed = true;
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break;
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case 'S':
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strip_symbols = STRIP_ALL;
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break;
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case 'g':
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strip_symbols = STRIP_DEBUG;
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break;
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case OPTION_STRIP_UNNEEDED:
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strip_symbols = STRIP_UNNEEDED;
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break;
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case 'K':
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add_specific_symbol (optarg, &keep_specific_list);
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break;
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case 'N':
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add_specific_symbol (optarg, &strip_specific_list);
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break;
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case 'L':
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add_specific_symbol (optarg, &localize_specific_list);
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break;
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case 'W':
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add_specific_symbol (optarg, &weaken_specific_list);
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break;
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case 'p':
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preserve_dates = true;
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break;
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case 'x':
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discard_locals = LOCALS_ALL;
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break;
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case 'X':
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discard_locals = LOCALS_START_L;
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break;
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case 'v':
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verbose = true;
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break;
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case 'V':
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show_version = true;
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break;
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case OPTION_WEAKEN:
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weaken = true;
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break;
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case OPTION_ADD_SECTION:
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{
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const char *s;
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@ -1799,9 +1902,9 @@ copy_main (argc, argv)
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FILE *f;
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s = strchr (optarg, '=');
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if (s == NULL)
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fatal (_("bad format for --add-section NAME=FILENAME"));
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fatal (_("bad format for %s"), "--add-section");
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if (stat (s + 1, & st) < 0)
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fatal (_("cannot stat: %s: %s"), s + 1, strerror (errno));
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@ -1820,10 +1923,10 @@ copy_main (argc, argv)
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pa->contents = (bfd_byte *) xmalloc (pa->size);
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f = fopen (pa->filename, FOPEN_RB);
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if (f == NULL)
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fatal (_("cannot open: %s: %s"), pa->filename, strerror (errno));
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if (fread (pa->contents, 1, pa->size, f) == 0
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|| ferror (f))
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fatal (_("%s: fread failed"), pa->filename);
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@ -1834,9 +1937,11 @@ copy_main (argc, argv)
|
|||
add_sections = pa;
|
||||
}
|
||||
break;
|
||||
|
||||
case OPTION_CHANGE_START:
|
||||
change_start = parse_vma (optarg, "--change-start");
|
||||
break;
|
||||
|
||||
case OPTION_CHANGE_SECTION_ADDRESS:
|
||||
case OPTION_CHANGE_SECTION_LMA:
|
||||
case OPTION_CHANGE_SECTION_VMA:
|
||||
|
|
@ -1847,7 +1952,7 @@ copy_main (argc, argv)
|
|||
char *option = NULL;
|
||||
bfd_vma val;
|
||||
enum change_action what = CHANGE_IGNORE;
|
||||
|
||||
|
||||
switch (c)
|
||||
{
|
||||
case OPTION_CHANGE_SECTION_ADDRESS:
|
||||
|
|
@ -1860,7 +1965,7 @@ copy_main (argc, argv)
|
|||
option = "--change-section-vma";
|
||||
break;
|
||||
}
|
||||
|
||||
|
||||
s = strchr (optarg, '=');
|
||||
if (s == NULL)
|
||||
{
|
||||
|
|
@ -1888,19 +1993,19 @@ copy_main (argc, argv)
|
|||
case '-': val = - val; /* Drop through. */
|
||||
case '+': what = CHANGE_MODIFY; break;
|
||||
}
|
||||
|
||||
|
||||
switch (c)
|
||||
{
|
||||
case OPTION_CHANGE_SECTION_ADDRESS:
|
||||
p->change_vma = what;
|
||||
p->vma_val = val;
|
||||
/* Drop through. */
|
||||
|
||||
|
||||
case OPTION_CHANGE_SECTION_LMA:
|
||||
p->change_lma = what;
|
||||
p->lma_val = val;
|
||||
break;
|
||||
|
||||
|
||||
case OPTION_CHANGE_SECTION_VMA:
|
||||
p->change_vma = what;
|
||||
p->vma_val = val;
|
||||
|
|
@ -1908,19 +2013,24 @@ copy_main (argc, argv)
|
|||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case OPTION_CHANGE_ADDRESSES:
|
||||
change_section_address = parse_vma (optarg, "--change-addresses");
|
||||
change_start = change_section_address;
|
||||
break;
|
||||
|
||||
case OPTION_CHANGE_WARNINGS:
|
||||
change_warn = true;
|
||||
break;
|
||||
|
||||
case OPTION_CHANGE_LEADING_CHAR:
|
||||
change_leading_char = true;
|
||||
break;
|
||||
|
||||
case OPTION_DEBUGGING:
|
||||
convert_debugging = true;
|
||||
break;
|
||||
|
||||
case OPTION_GAP_FILL:
|
||||
{
|
||||
bfd_vma gap_fill_vma;
|
||||
|
|
@ -1930,25 +2040,61 @@ copy_main (argc, argv)
|
|||
if ((bfd_vma) gap_fill != gap_fill_vma)
|
||||
{
|
||||
char buff[20];
|
||||
|
||||
|
||||
sprintf_vma (buff, gap_fill_vma);
|
||||
|
||||
|
||||
non_fatal (_("Warning: truncating gap-fill from 0x%s to 0x%x"),
|
||||
buff, gap_fill);
|
||||
}
|
||||
gap_fill_set = true;
|
||||
}
|
||||
break;
|
||||
|
||||
case OPTION_NO_CHANGE_WARNINGS:
|
||||
change_warn = false;
|
||||
break;
|
||||
|
||||
case OPTION_PAD_TO:
|
||||
pad_to = parse_vma (optarg, "--pad-to");
|
||||
pad_to_set = true;
|
||||
break;
|
||||
|
||||
case OPTION_REMOVE_LEADING_CHAR:
|
||||
remove_leading_char = true;
|
||||
break;
|
||||
|
||||
case OPTION_REDEFINE_SYM:
|
||||
{
|
||||
/* Push this redefinition onto redefine_symbol_list. */
|
||||
|
||||
int len;
|
||||
const char *s;
|
||||
const char *nextarg;
|
||||
char *source, *target;
|
||||
|
||||
s = strchr (optarg, '=');
|
||||
if (s == NULL)
|
||||
{
|
||||
fatal (_("bad format for %s"), "--redefine-sym");
|
||||
}
|
||||
|
||||
len = s - optarg;
|
||||
source = (char *) xmalloc (len + 1);
|
||||
strncpy (source, optarg, len);
|
||||
source[len] = '\0';
|
||||
|
||||
nextarg = s + 1;
|
||||
len = strlen (nextarg);
|
||||
target = (char *) xmalloc (len + 1);
|
||||
strcpy (target, nextarg);
|
||||
|
||||
redefine_list_append (source, target);
|
||||
|
||||
free (source);
|
||||
free (target);
|
||||
}
|
||||
break;
|
||||
|
||||
case OPTION_SET_SECTION_FLAGS:
|
||||
{
|
||||
const char *s;
|
||||
|
|
@ -1957,7 +2103,7 @@ copy_main (argc, argv)
|
|||
|
||||
s = strchr (optarg, '=');
|
||||
if (s == NULL)
|
||||
fatal (_("bad format for --set-section-flags"));
|
||||
fatal (_("bad format for %s"), "--set-section-flags");
|
||||
|
||||
len = s - optarg;
|
||||
name = (char *) xmalloc (len + 1);
|
||||
|
|
@ -1970,14 +2116,18 @@ copy_main (argc, argv)
|
|||
p->flags = parse_flags (s + 1);
|
||||
}
|
||||
break;
|
||||
|
||||
case OPTION_SET_START:
|
||||
set_start = parse_vma (optarg, "--set-start");
|
||||
set_start_set = true;
|
||||
break;
|
||||
|
||||
case 0:
|
||||
break; /* we've been given a long option */
|
||||
|
||||
case 'h':
|
||||
copy_usage (stdout, 0);
|
||||
|
||||
default:
|
||||
copy_usage (stderr, 1);
|
||||
}
|
||||
|
|
@ -2018,7 +2168,7 @@ copy_main (argc, argv)
|
|||
|
||||
copy_file (input_filename, tmpname, input_target, output_target);
|
||||
if (status == 0)
|
||||
{
|
||||
{
|
||||
if (preserve_dates)
|
||||
set_times (tmpname, &statbuf);
|
||||
smart_rename (tmpname, input_filename, preserve_dates);
|
||||
|
|
@ -2044,22 +2194,24 @@ copy_main (argc, argv)
|
|||
char buff [20];
|
||||
|
||||
sprintf_vma (buff, p->vma_val);
|
||||
|
||||
|
||||
/* xgettext:c-format */
|
||||
non_fatal (_("Warning: --change-section-vma %s%c0x%s never used"),
|
||||
non_fatal (_("%s %s%c0x%s never used"),
|
||||
"--change-section-vma",
|
||||
p->name,
|
||||
p->change_vma == CHANGE_SET ? '=' : '+',
|
||||
buff);
|
||||
}
|
||||
|
||||
|
||||
if (p->change_lma != CHANGE_IGNORE)
|
||||
{
|
||||
char buff [20];
|
||||
|
||||
sprintf_vma (buff, p->lma_val);
|
||||
|
||||
|
||||
/* xgettext:c-format */
|
||||
non_fatal (_("Warning: --change-section-lma %s%c0x%s never used"),
|
||||
non_fatal (_("%s %s%c0x%s never used"),
|
||||
"--change-section-lma",
|
||||
p->name,
|
||||
p->change_lma == CHANGE_SET ? '=' : '+',
|
||||
buff);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue