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Add a symbols-only mode to nm.

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PR 27487
	* nm.c (FORMAT_JUST_SYMBOLS): Define.
	(struct optput_fns): Add entry for FORMAT_JUST_SYMBOLS.
	(long_options): Add just-symbols.
	(set_output_format): Add support for just-symbols.
	(get_print_format): Likewise.
	(do_not_print_object_filename): New function.
	(do_not_print_archive_filename): New function.
	(do_not_print_archive_member): New function.
	(do_not_print_symbol_filename): New function.
	(just_print_symbol_name): New function.
	(main): Handle --just-symbols.
	* NEWS: Mention the new feature.
	* doc/binutils.texi: Document the new feature.
This commit is contained in:
Nick Clifton
2021-03-15 10:55:49 +00:00
parent 8d624a9d80
commit 1996d0f12c
4 changed files with 137 additions and 38 deletions
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109
binutils/nm.c
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@@ -79,41 +79,63 @@ struct extended_symbol_info
static void print_object_filename_bsd (const char *);
static void print_object_filename_sysv (const char *);
static void print_object_filename_posix (const char *);
static void do_not_print_object_filename (const char *);
static void print_archive_filename_bsd (const char *);
static void print_archive_filename_sysv (const char *);
static void print_archive_filename_posix (const char *);
static void do_not_print_archive_filename (const char *);
static void print_archive_member_bsd (const char *, const char *);
static void print_archive_member_sysv (const char *, const char *);
static void print_archive_member_posix (const char *, const char *);
static void do_not_print_archive_member (const char *, const char *);
static void print_symbol_filename_bsd (bfd *, bfd *);
static void print_symbol_filename_sysv (bfd *, bfd *);
static void print_symbol_filename_posix (bfd *, bfd *);
static void print_value (bfd *, bfd_vma);
static void do_not_print_symbol_filename (bfd *, bfd *);
static void print_symbol_info_bsd (struct extended_symbol_info *, bfd *);
static void print_symbol_info_sysv (struct extended_symbol_info *, bfd *);
static void print_symbol_info_posix (struct extended_symbol_info *, bfd *);
static void just_print_symbol_name (struct extended_symbol_info *, bfd *);
static void print_value (bfd *, bfd_vma);
/* Support for different output formats. */
struct output_fns
{
/* Print the name of an object file given on the command line. */
void (*print_object_filename) (const char *);
{
/* Print the name of an object file given on the command line. */
void (*print_object_filename) (const char *);
/* Print the name of an archive file given on the command line. */
void (*print_archive_filename) (const char *);
/* Print the name of an archive file given on the command line. */
void (*print_archive_filename) (const char *);
/* Print the name of an archive member file. */
void (*print_archive_member) (const char *, const char *);
/* Print the name of an archive member file. */
void (*print_archive_member) (const char *, const char *);
/* Print the name of the file (and archive, if there is one)
containing a symbol. */
void (*print_symbol_filename) (bfd *, bfd *);
/* Print the name of the file (and archive, if there is one)
containing a symbol. */
void (*print_symbol_filename) (bfd *, bfd *);
/* Print a line of information about a symbol. */
void (*print_symbol_info) (struct extended_symbol_info *, bfd *);
};
/* Print a line of information about a symbol. */
void (*print_symbol_info) (struct extended_symbol_info *, bfd *);
};
static struct output_fns formats[] =
/* Indices in `formats'. */
enum formats
{
FORMAT_BSD = 0,
FORMAT_SYSV,
FORMAT_POSIX,
FORMAT_JUST_SYMBOLS,
FORMAT_MAX
};
#define FORMAT_DEFAULT FORMAT_BSD
static struct output_fns formats[FORMAT_MAX] =
{
{print_object_filename_bsd,
print_archive_filename_bsd,
@@ -129,14 +151,14 @@ static struct output_fns formats[] =
print_archive_filename_posix,
print_archive_member_posix,
print_symbol_filename_posix,
print_symbol_info_posix}
print_symbol_info_posix},
{do_not_print_object_filename,
do_not_print_archive_filename,
do_not_print_archive_member,
do_not_print_symbol_filename,
just_print_symbol_name}
};
/* Indices in `formats'. */
#define FORMAT_BSD 0
#define FORMAT_SYSV 1
#define FORMAT_POSIX 2
#define FORMAT_DEFAULT FORMAT_BSD
/* The output format to use. */
static struct output_fns *format = &formats[FORMAT_DEFAULT];
@@ -214,6 +236,7 @@ static struct option long_options[] =
{"format", required_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
{"ifunc-chars", required_argument, 0, OPTION_IFUNC_CHARS},
{"just-symbols", no_argument, 0, 'j'},
{"line-numbers", no_argument, 0, 'l'},
{"no-cplus", no_argument, &do_demangle, 0}, /* Linux compatibility. */
{"no-demangle", no_argument, &do_demangle, 0},
@@ -265,9 +288,10 @@ usage (FILE *stream, int status)
--defined-only Display only defined symbols\n\
-e (ignored)\n\
-f, --format=FORMAT Use the output format FORMAT. FORMAT can be `bsd',\n\
`sysv' or `posix'. The default is `bsd'\n\
`sysv', `posix' or 'just-symbols'. The default is `bsd'\n\
-g, --extern-only Display only external symbols\n\
--ifunc-chars=CHARS Characters to use when displaying ifunc symbols\n\
-j, --just-symbols Same as --format=just-symbols\n\
-l, --line-numbers Use debugging information to find a filename and\n\
line number for each symbol\n\
-n, --numeric-sort Sort symbols numerically by address\n\
@@ -338,6 +362,10 @@ set_output_format (char *f)
case 'S':
i = FORMAT_SYSV;
break;
case 'j':
case 'J':
i = FORMAT_JUST_SYMBOLS;
break;
default:
fatal (_("%s: invalid output format"), f);
}
@@ -1268,7 +1296,7 @@ static const char *
get_print_format (void)
{
const char * padding;
if (print_format == FORMAT_POSIX)
if (print_format == FORMAT_POSIX || print_format == FORMAT_JUST_SYMBOLS)
{
/* POSIX compatible output does not have any padding. */
padding = "";
@@ -1477,6 +1505,11 @@ print_object_filename_posix (const char *filename)
if (filename_per_file && !filename_per_symbol)
printf ("%s:\n", filename);
}
static void
do_not_print_object_filename (const char *filename ATTRIBUTE_UNUSED)
{
}
/* Print the name of an archive file given on the command line. */
@@ -1496,6 +1529,11 @@ static void
print_archive_filename_posix (const char *filename ATTRIBUTE_UNUSED)
{
}
static void
do_not_print_archive_filename (const char *filename ATTRIBUTE_UNUSED)
{
}
/* Print the name of an archive member file. */
@@ -1528,6 +1566,13 @@ print_archive_member_posix (const char *archive, const char *filename)
if (!filename_per_symbol)
printf ("%s[%s]:\n", archive, filename);
}
static void
do_not_print_archive_member (const char *archive ATTRIBUTE_UNUSED,
const char *filename ATTRIBUTE_UNUSED)
{
}
/* Print the name of the file (and archive, if there is one)
containing a symbol. */
@@ -1566,6 +1611,13 @@ print_symbol_filename_posix (bfd *archive_bfd, bfd *abfd)
printf ("%s: ", bfd_get_filename (abfd));
}
}
static void
do_not_print_symbol_filename (bfd *archive_bfd ATTRIBUTE_UNUSED,
bfd *abfd ATTRIBUTE_UNUSED)
{
}
/* Print a symbol value. */
@@ -1723,6 +1775,12 @@ print_symbol_info_posix (struct extended_symbol_info *info, bfd *abfd)
print_value (abfd, SYM_SIZE (info));
}
}
static void
just_print_symbol_name (struct extended_symbol_info *info, bfd *abfd)
{
print_symname ("%s", info, NULL, abfd);
}
int
main (int argc, char **argv)
@@ -1755,7 +1813,7 @@ main (int argc, char **argv)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
while ((c = getopt_long (argc, argv, "aABCDef:gHhlnopPrSst:uvVvX:",
while ((c = getopt_long (argc, argv, "aABCDef:gHhjJlnopPrSst:uvVvX:",
long_options, (int *) 0)) != EOF)
{
switch (c)
@@ -1830,6 +1888,9 @@ main (int argc, char **argv)
case 'P':
set_output_format ("posix");
break;
case 'j':
set_output_format ("just-symbols");
break;
case 'r':
reverse_sort = 1;
break;