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Add command line switches to objcopy to provide lists of symbols in files

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This commit is contained in:
Nick Clifton
2001-05-30 10:46:28 +00:00
parent 5ea2a32c88
commit 16b2b71c0c
19 changed files with 3575 additions and 4343 deletions
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175
binutils/objcopy.c
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@@ -57,6 +57,7 @@ static void copy_section PARAMS ((bfd *, asection *, PTR));
static void get_sections PARAMS ((bfd *, asection *, PTR));
static int compare_section_lma PARAMS ((const PTR, const PTR));
static void add_specific_symbol PARAMS ((const char *, struct symlist **));
static void add_specific_symbols PARAMS ((const char *, struct symlist **));
static boolean is_specified_symbol PARAMS ((const char *, struct symlist *));
static boolean is_strip_section PARAMS ((bfd *, asection *));
static unsigned int filter_symbols
@@ -184,11 +185,13 @@ static boolean change_leading_char = false;
static boolean remove_leading_char = false;
/* List of symbols to strip, keep, localize, weaken, or redefine. */
/* List of symbols to strip, keep, localize, keep-global, weaken,
or redefine. */
static struct symlist *strip_specific_list = NULL;
static struct symlist *keep_specific_list = NULL;
static struct symlist *localize_specific_list = NULL;
static struct symlist *keepglobal_specific_list = NULL;
static struct symlist *weaken_specific_list = NULL;
static struct redefine_node *redefine_sym_list = NULL;
@@ -218,6 +221,11 @@ static boolean weaken = false;
#define OPTION_REDEFINE_SYM (OPTION_WEAKEN + 1)
#define OPTION_SREC_LEN (OPTION_REDEFINE_SYM + 1)
#define OPTION_SREC_FORCES3 (OPTION_SREC_LEN + 1)
#define OPTION_STRIP_SYMBOLS (OPTION_SREC_FORCES3 + 1)
#define OPTION_KEEP_SYMBOLS (OPTION_STRIP_SYMBOLS + 1)
#define OPTION_LOCALIZE_SYMBOLS (OPTION_KEEP_SYMBOLS + 1)
#define OPTION_KEEPGLOBAL_SYMBOLS (OPTION_LOCALIZE_SYMBOLS + 1)
#define OPTION_WEAKEN_SYMBOLS (OPTION_KEEPGLOBAL_SYMBOLS + 1)
/* Options to handle if running as "strip". */
@@ -280,6 +288,7 @@ static struct option copy_options[] =
{"pad-to", required_argument, 0, OPTION_PAD_TO},
{"preserve-dates", no_argument, 0, 'p'},
{"localize-symbol", required_argument, 0, 'L'},
{"keep-global-symbol", required_argument, 0, 'G'},
{"remove-leading-char", no_argument, 0, OPTION_REMOVE_LEADING_CHAR},
{"remove-section", required_argument, 0, 'R'},
{"set-section-flags", required_argument, 0, OPTION_SET_SECTION_FLAGS},
@@ -296,6 +305,11 @@ static struct option copy_options[] =
{"redefine-sym", required_argument, 0, OPTION_REDEFINE_SYM},
{"srec-len", required_argument, 0, OPTION_SREC_LEN},
{"srec-forceS3", no_argument, 0, OPTION_SREC_FORCES3},
{"keep-symbols", required_argument, 0, OPTION_KEEP_SYMBOLS},
{"strip-symbols", required_argument, 0, OPTION_STRIP_SYMBOLS},
{"keep-global-symbols", required_argument, 0, OPTION_KEEPGLOBAL_SYMBOLS},
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"weaken-symbols", required_argument, 0, OPTION_WEAKEN_SYMBOLS},
{0, no_argument, 0, 0}
};
@@ -341,6 +355,7 @@ copy_usage (stream, exit_status)
-N --strip-symbol <name> Do not copy symbol <name>\n\
-K --keep-symbol <name> Only copy symbol <name>\n\
-L --localize-symbol <name> Force symbol <name> to be marked as a local\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\
-x --discard-all Remove all non-global symbols\n\
@@ -370,6 +385,11 @@ copy_usage (stream, exit_status)
--redefine-sym <old>=<new> Redefine symbol name <old> to <new>\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\
--keep-symbols <file> -K for all symbols listed in <file>\n\
--localize-symbols <file> -L for all symbols listed 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\
-v --verbose List all object files modified\n\
-V --version Display this program's version number\n\
-h --help Display this output\n\
@@ -518,6 +538,122 @@ add_specific_symbol (name, list)
*list = tmp_list;
}
/* 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 (filename, list)
const char *filename;
struct symlist **list;
{
struct stat st;
FILE * f;
char * line;
char * buffer;
unsigned int line_count;
if (stat (filename, & st) < 0)
fatal (_("cannot stat: %s: %s"), filename, strerror (errno));
if (st.st_size == 0)
return;
buffer = (char *) xmalloc (st.st_size + 2);
f = fopen (filename, FOPEN_RT);
if (f == NULL)
fatal (_("cannot open: %s: %s"), filename, strerror (errno));
if (fread (buffer, 1, st.st_size, f) == 0 || ferror (f))
fatal (_("%s: fread failed"), filename);
fclose (f);
buffer [st.st_size] = '\n';
buffer [st.st_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 (_("Ignoring rubbish found on line %d of %s"),
line_count, filename);
}
* name_end = '\0';
if (name_end > name)
add_specific_symbol (name, list);
/* 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. */
@@ -636,6 +772,12 @@ filter_symbols (abfd, obfd, osyms, isyms, symcount)
else if (relocatable /* Relocatable file. */
&& (flags & (BSF_GLOBAL | BSF_WEAK)) != 0)
keep = 1;
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 = 1;
else if ((flags & BSF_GLOBAL) != 0 /* Global symbol. */
|| (flags & BSF_WEAK) != 0
|| bfd_is_und_section (bfd_get_section (sym))
@@ -665,7 +807,9 @@ filter_symbols (abfd, obfd, osyms, isyms, symcount)
sym->flags |= BSF_WEAK;
}
if (keep && (flags & (BSF_GLOBAL | BSF_WEAK))
&& is_specified_symbol (name, localize_specific_list))
&& (is_specified_symbol (name, localize_specific_list)
|| (keepglobal_specific_list != NULL
&& ! is_specified_symbol (name, keepglobal_specific_list))))
{
sym->flags &= ~(BSF_GLOBAL | BSF_WEAK);
sym->flags |= BSF_LOCAL;
@@ -977,6 +1121,7 @@ copy_object (ibfd, obfd)
|| strip_specific_list != NULL
|| keep_specific_list != NULL
|| localize_specific_list != NULL
|| keepglobal_specific_list != NULL
|| weaken_specific_list != NULL
|| sections_removed
|| sections_copied
@@ -1695,7 +1840,7 @@ strip_main (argc, argv)
struct section_list *p;
char *output_file = NULL;
while ((c = getopt_long (argc, argv, "I:O:F:K:N:R:o:sSpdgxXVv",
while ((c = getopt_long (argc, argv, "b:i:I:j:K:N:s:O:d:F:L:G:R:SpgxXVvW:",
strip_options, (int *) 0)) != EOF)
{
switch (c)
@@ -1903,6 +2048,10 @@ copy_main (argc, argv)
add_specific_symbol (optarg, &localize_specific_list);
break;
case 'G':
add_specific_symbol (optarg, &keepglobal_specific_list);
break;
case 'W':
add_specific_symbol (optarg, &weaken_specific_list);
break;
@@ -2169,6 +2318,26 @@ copy_main (argc, argv)
S3Forced = true;
break;
case OPTION_STRIP_SYMBOLS:
add_specific_symbols (optarg, &strip_specific_list);
break;
case OPTION_KEEP_SYMBOLS:
add_specific_symbols (optarg, &keep_specific_list);
break;
case OPTION_LOCALIZE_SYMBOLS:
add_specific_symbols (optarg, &localize_specific_list);
break;
case OPTION_KEEPGLOBAL_SYMBOLS:
add_specific_symbols (optarg, &keepglobal_specific_list);
break;
case OPTION_WEAKEN_SYMBOLS:
add_specific_symbols (optarg, &weaken_specific_list);
break;
case 0:
break; /* we've been given a long option */