darling-gdb/binutils/nm.c
David Henkel-Wallace 2fa0b342a5 Initial revision
1991-03-21 21:29:06 +00:00

388 lines
9.2 KiB
C
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/*** nm.c -- Describe symbol table of a rel file. */
#include "sysdep.h"
#include "bfd.h"
#include "getopt.h"
#include "stab.gnu.h"
#include <ranlib.h>
PROTO(static boolean, display_file, (char *filename));
PROTO(static boolean, do_one_rel_file, (bfd *file));
PROTO(static unsigned int, filter_symbols, (bfd *file, asymbol **syms,
unsigned long symcount));
PROTO(static void, print_symbols, (bfd *file, asymbol **syms,
unsigned long symcount));
extern PROTO(int, (*sorters[2][2]), (char *x, char *y));
PROTO(static void, print_symdef_entry, (bfd * abfd));
/* Command options. */
int external_only = 0; /* print external symbols only */
int file_on_each_line = 0; /* print file name on each line */
int no_sort = 0; /* don't sort; print syms in order found */
int print_debug_syms = 0; /* print debugger-only symbols too */
int print_armap = 0; /* describe __.SYMDEF data in archive files. */
int reverse_sort = 0; /* sort in downward(alpha or numeric) order */
int sort_numerically = 0; /* sort in numeric rather than alpha order */
int undefined_only = 0; /* print undefined symbols only */
boolean print_each_filename = false; /* Ick. Used in archives. */
/* IMPORT */
extern char *program_name;
extern char *program_version;
extern char *target;
struct option long_options[] = {
{"debug-syms", 0, &print_debug_syms, 1},
{"extern-only", 0, &external_only, 1},
{"no-sort", 0, &no_sort, 1},
{"numeric-sort", 0, &sort_numerically, 1},
{"print-armap", 0, &print_armap, 1},
{"print-file-name", 0, &file_on_each_line, 1},
{"reverse-sort", 0, &reverse_sort, 1},
{"target", 2, NULL, NULL},
{"undefined-only", 0, &undefined_only, 1},
{0, 0, 0, 0}
};
/* Some error-reporting functions */
void
usage ()
{
fprintf(stderr, "nm %s\nUsage: %s [-agnoprsu] filename...\n",
program_version, program_name);
exit(0);
}
int
main (argc, argv)
int argc;
char **argv;
{
int c; /* sez which option char */
int ind = 0; /* used by getopt and ignored by us */
extern int optind; /* steps thru options */
program_name = *argv;
while ((c = getopt_long(argc, argv, "agnoprsu", long_options, &ind)) != EOF) {
switch (c) {
case 'a': print_debug_syms = 1; break;
case 'g': external_only = 1; break;
case 'n': sort_numerically = 1; break;
case 'o': file_on_each_line = 1; break;
case 'p': no_sort = 1; break;
case 'r': reverse_sort = 1; break;
case 's': print_armap = 1; break;
case 'u': undefined_only = 1; break;
case 0:
if (!strcmp("target",(long_options[option_index]).name)) {
target = optarg;
}
break; /* we've been given a long option */
default:
usage ();
}
}
/* Strangely, for the shell you should return only a nonzero value
on sucess -- the inverse of the C sense. */
/* OK, all options now parsed. If no filename specified, do a.out. */
if (optind == argc) return !display_file ("a.out");
/* We were given several filenames to do: */
while (optind < argc)
if (!display_file (argv[optind++])) return 1;
return 0;
}
/** Display a file's stats */
/* goto here is marginally cleaner than the nested if syntax */
static boolean
display_file (filename)
char *filename;
{
boolean retval = false;
bfd *file;
bfd *arfile = NULL;
file = bfd_openr(filename, target);
if (file == NULL) {
bfd_fatal (filename);
}
if (bfd_check_format(file, bfd_object)) {
retval = do_one_rel_file (file);
goto closer;
}
if (!bfd_check_format (file, bfd_archive)) {
fprintf (stderr, "%s: %s: unknown format.\n", program_name, filename);
retval = false;
goto closer;
}
printf("In archive %s:\n", filename);
if (print_armap) print_symdef_entry (file);
for (;;) {
arfile = bfd_openr_next_archived_file (file, arfile);
if (arfile == NULL) {
if (bfd_error != no_more_archived_files)
bfd_fatal (filename);
goto closer;
}
if (!bfd_check_format(arfile, bfd_object))
printf("%s: not an object file\n", arfile->filename);
else {
printf ("\n%s:\n", arfile->filename);
if (!do_one_rel_file (arfile)) return false;
}
}
closer:
if (bfd_close(file) == false)
bfd_fatal (filename);
return retval;
}
static boolean
do_one_rel_file (abfd)
bfd *abfd;
{
unsigned int storage;
asymbol **syms;
unsigned int symcount = 0;
if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) {
(void) printf ("No symbols in \"%s\".\n", bfd_get_filename (abfd));
return true;
}
storage = get_symtab_upper_bound (abfd);
if (storage == 0) {
nosymz:
fprintf (stderr, "%s: Symflags set but there are none?\n",
bfd_get_filename (abfd));
exit (1);
}
syms = (asymbol **) xmalloc (storage);
symcount = bfd_canonicalize_symtab (abfd, syms);
if (symcount == 0) goto nosymz;
/* Discard the symbols we don't want to print.
It's OK to do this in place; we'll free the storage anyway
(after printing) */
symcount = filter_symbols (abfd, syms, symcount);
if (!no_sort)
qsort((char *) syms, symcount, sizeof (asymbol *),
sorters[sort_numerically][reverse_sort]);
if (print_each_filename && !file_on_each_line)
printf("\n%s:\n", bfd_get_filename(abfd));
print_symbols (abfd, syms, symcount);
free (syms);
return true;
}
/* Symbol-sorting predicates */
#define valueof(x) ((x)->section ? (x)->section->vma + (x)->value : (x)->value)
int
numeric_forward (x, y)
char *x;
char *y;
{
return (valueof(*(asymbol **)x) - valueof(*(asymbol **) y));;
}
int
numeric_reverse (x, y)
char *x;
char *y;
{
return (valueof(*(asymbol **)y) - valueof(*(asymbol **) x));
}
int
non_numeric_forward (x, y)
char *x;
char *y;
{
char *xn = (*(asymbol **) x)->name;
char *yn = (*(asymbol **) y)->name;
return ((xn == NULL) ? ((yn == NULL) ? 0 : -1) :
((yn == NULL) ? 1 : strcmp (xn, yn)));
}
int
non_numeric_reverse (x, y)
char *x;
char *y;
{
return -(non_numeric_forward (x, y));
}
int (*sorters[2][2])() = {
{non_numeric_forward, non_numeric_reverse},
{numeric_forward, numeric_reverse},
};
/* Choose which symbol entries to print;
compact them downward to get rid of the rest.
Return the number of symbols to be printed. */
static unsigned int
filter_symbols (abfd, syms, symcount)
bfd *abfd;
asymbol **syms;
unsigned long symcount;
{
asymbol **from, **to;
unsigned int dst_count = 0;
unsigned int src_count;
for (from = to = syms, src_count = 0; src_count <symcount; src_count++) {
int keep = 0;
flagword flags = (from[src_count])->flags;
if (undefined_only) {
keep = (flags & BSF_UNDEFINED);
} else if (external_only) {
keep = ((flags & BSF_GLOBAL) || (flags & BSF_UNDEFINED) ||
(flags & BSF_FORT_COMM));
} else {
keep = 1;
}
if (!print_debug_syms && ((flags & BSF_DEBUGGING) != 0)) {
keep = 0;
}
if (keep) {
to[dst_count++] = from[src_count];
}
}
return dst_count;
}
/* Return a lower-case character corresponding to the symbol class of sym */
char
decode_symclass (sym)
asymbol *sym;
{
flagword flags = sym->flags;
if ((sym->value == 0) && (sym->section != NULL))
/* Huh? All section names don't begin with "." */
return (sym->section->name)[1];
if (flags & BSF_FORT_COMM) return 'C';
if (flags & BSF_UNDEFINED) return 'U';
if (flags & BSF_ABSOLUTE) return 'a';
if ( (flags & BSF_GLOBAL) || (flags & BSF_LOCAL) ){
if ( !strcmp(sym->section->name, ".text") ){
return 't';
} else if ( !strcmp(sym->section->name, ".data") ){
return 'd';
} else if ( !strcmp(sym->section->name, ".bss") ){
return 'b';
} else {
return 'o';
}
}
/* We don't have to handle these cases just yet, but we will soon:
N_SETV: 'v';
N_SETA: 'l';
N_SETT: 'x';
N_SETD: 'z';
N_SETB: 's';
N_INDR: 'i';
*/
return '?';
}
static void
print_symbols (abfd, syms, symcount)
bfd *abfd;
asymbol **syms;
unsigned long symcount;
{
asymbol **sym = syms, **end = syms + symcount;
char class;
for (; sym < end; ++sym) {
if (file_on_each_line) printf("%s:", bfd_get_filename(abfd));
if (undefined_only) {
if ((*sym)->flags & BSF_UNDEFINED)
puts ((*sym)->name);
}
else {
asymbol *p = *sym;
if (p) {
class = decode_symclass (p);
if (p->flags & BSF_GLOBAL)
class = toupper (class);
if (p->value || ((p->flags & BSF_UNDEFINED) != BSF_UNDEFINED))
printf ("%08lx ", (p->section ? p->value + p->section->vma : p->value));
else fputs (" ", stdout);
printf ("%c %s\n", class, p->name);
}
}
}
}
static void
print_symdef_entry (abfd)
bfd * abfd;
{
symindex idx = BFD_NO_MORE_SYMBOLS;
carsym *thesym;
boolean everprinted = false;
for (idx = bfd_get_next_mapent (abfd, idx, &thesym);
idx != BFD_NO_MORE_SYMBOLS;
idx = bfd_get_next_mapent (abfd, idx, &thesym)) {
bfd *elt;
if (!everprinted) {
printf ("\nArchive index:\n");
everprinted = true;
}
elt = bfd_get_elt_at_index (abfd, idx);
if (thesym->name != (char *)NULL) {
printf ("%s in %s\n", thesym->name, bfd_get_filename (elt));
}
}
}