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Prefixing sybmols/sections with objcopy
- From: nickk at ubicom dot com
- To: binutils at sources dot redhat dot com
- Subject: Prefixing sybmols/sections with objcopy
Hi all,
I would like to submit the following patch to objcopy for review. It adds the ability to globally prefix all symbols and/or sections with a given prefix to shift the name space.
A general copyright assignment has been signed by Ubicom.
Thanks
Nick
2002-10-25 Nick Kelsey <nick@ubicom.com>
* objcopy.c (rename feature extension): Added --prefix-symbols <prefix>
option to rename all symbols by adding the given prefix to the begining
of the symbol name. This is useful to provide name space seperation
regardless of how the object file was created. Added --prefix-sections
<prefix> and --prefix-alloc-sections <prefix> options to rename all
sections (or all sections with the alloc flag set) by adding the given
prefix to the begining of the symbol name.
cvs diff -p -r1.1.1.1 objcopy.c
Index: objcopy.c
===================================================================
RCS file: /home/cvsadmin/cvsres/toolchain/src/binutils/objcopy.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -p -r1.1.1.1 -r1.2
*** objcopy.c 15 Oct 2002 17:14:35 -0000 1.1.1.1
--- objcopy.c 16 Oct 2002 02:00:33 -0000 1.2
*************** static struct redefine_node *redefine_sy
*** 215,220 ****
--- 215,225 ----
/* If this is true, we weaken global symbols (set BSF_WEAK). */
static boolean weaken = false;
+ /* Prefix symbols/sections */
+ static char *prefix_symbols_string = 0;
+ static char *prefix_sections_string = 0;
+ static char *prefix_alloc_sections_string = 0;
+
/* 150 isn't special; it's just an arbitrary non-ASCII char value. */
#define OPTION_ADD_SECTION 150
*************** static boolean weaken = false;
*** 244,249 ****
--- 249,257 ----
#define OPTION_WEAKEN_SYMBOLS (OPTION_KEEPGLOBAL_SYMBOLS + 1)
#define OPTION_RENAME_SECTION (OPTION_WEAKEN_SYMBOLS + 1)
#define OPTION_ALT_MACH_CODE (OPTION_RENAME_SECTION + 1)
+ #define OPTION_PREFIX_SYMBOLS (OPTION_ALT_MACH_CODE + 1)
+ #define OPTION_PREFIX_SECTIONS (OPTION_PREFIX_SYMBOLS + 1)
+ #define OPTION_PREFIX_ALLOC_SECTIONS (OPTION_PREFIX_SECTIONS + 1)
/* Options to handle if running as "strip". */
*************** static struct option copy_options[] =
*** 331,336 ****
--- 339,347 ----
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"weaken-symbols", required_argument, 0, OPTION_WEAKEN_SYMBOLS},
{"alt-machine-code", required_argument, 0, OPTION_ALT_MACH_CODE},
+ {"prefix-symbols", required_argument, 0, OPTION_PREFIX_SYMBOLS},
+ {"prefix-sections", required_argument, 0, OPTION_PREFIX_SECTIONS},
+ {"prefix-alloc-sections", required_argument, 0, OPTION_PREFIX_ALLOC_SECTIONS},
{0, no_argument, 0, 0}
};
*************** copy_usage (stream, exit_status)
*** 415,420 ****
--- 426,436 ----
--keep-global-symbols <file> -G for all symbols listed in <file>\n\
--weaken-symbols <file> -W for all symbols listed in <file>\n\
--alt-machine-code <index> Use alternate machine code for output\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\
-v --verbose List all object files modified\n\
-V --version Display this program's version number\n\
-h --help Display this output\n\
*************** filter_symbols (abfd, obfd, osyms, isyms
*** 790,795 ****
--- 806,820 ----
&& name[0] == bfd_get_symbol_leading_char (abfd))
name = bfd_asymbol_name (sym) = name + 1;
+ if (prefix_symbols_string)
+ {
+ char *n;
+ n = xmalloc (strlen (prefix_symbols_string) + strlen (name) + 1);
+ strcpy (n, prefix_symbols_string);
+ strcat (n, name);
+ name = bfd_asymbol_name (sym) = n;
+ }
+
if (strip_symbols == STRIP_ALL)
keep = 0;
else if ((flags & BSF_KEEP) != 0 /* Used in relocation. */
*************** copy_object (ibfd, obfd)
*** 1159,1165 ****
|| change_leading_char
|| remove_leading_char
|| redefine_sym_list
! || weaken)
{
/* Mark symbols used in output relocations so that they
are kept, even if they are local labels or static symbols.
--- 1184,1191 ----
|| change_leading_char
|| remove_leading_char
|| redefine_sym_list
! || weaken
! || prefix_symbols_string)
{
/* Mark symbols used in output relocations so that they
are kept, even if they are local labels or static symbols.
*************** setup_section (ibfd, isection, obfdarg)
*** 1597,1602 ****
--- 1623,1646 ----
/* Get the, possibly new, name of the output section. */
name = find_section_rename (ibfd, isection, & flags);
+ /* Prefix sections */
+ if (prefix_sections_string)
+ {
+ char *n;
+ n = xmalloc (strlen (prefix_sections_string) + strlen (name) + 1);
+ strcpy (n, prefix_sections_string);
+ strcat (n, name);
+ name = n;
+ }
+ else if ((prefix_alloc_sections_string) && (bfd_get_section_flags(ibfd, isection) & SEC_ALLOC))
+ {
+ char *n;
+ n = xmalloc (strlen (prefix_alloc_sections_string) + strlen (name) + 1);
+ strcpy (n, prefix_alloc_sections_string);
+ strcat (n, name);
+ name = n;
+ }
+
osection = bfd_make_section_anyway (obfd, name);
if (osection == NULL)
*************** copy_main (argc, argv)
*** 2552,2557 ****
--- 2596,2612 ----
use_alt_mach_code = atoi (optarg);
if (use_alt_mach_code <= 0)
fatal (_("alternate machine code index must be positive"));
+ break;
+ case OPTION_PREFIX_SYMBOLS:
+ prefix_symbols_string = optarg;
+ break;
+
+ case OPTION_PREFIX_SECTIONS:
+ prefix_sections_string = optarg;
+ break;
+
+ case OPTION_PREFIX_ALLOC_SECTIONS:
+ prefix_alloc_sections_string = optarg;
break;
case 0: