/* Describe symbol table of a rel file. Copyright (C) 1986 Free Software Foundation, Inc. NO WARRANTY BECAUSE THIS PROGRAM IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, RICHARD M. STALLMAN AND/OR OTHER PARTIES PROVIDE THIS PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M. STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., AND/OR ANY OTHER PARTY WHO MAY MODIFY AND REDISTRIBUTE THIS PROGRAM AS PERMITTED BELOW, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) THIS PROGRAM, EVEN IF YOU HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. GENERAL PUBLIC LICENSE TO COPY 1. You may copy and distribute verbatim copies of this source file as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy a valid copyright notice "Copyright (C) 1986 Free Software Foundation, Inc.", and include following the copyright notice a verbatim copy of the above disclaimer of warranty and of this License. 2. You may modify your copy or copies of this source file or any portion of it, and copy and distribute such modifications under the terms of Paragraph 1 above, provided that you also do the following: a) cause the modified files to carry prominent notices stating that you changed the files and the date of any change; and b) cause the whole of any work that you distribute or publish, that in whole or in part contains or is a derivative of this program or any part thereof, to be licensed at no charge to all third parties on terms identical to those contained in this License Agreement (except that you may choose to grant more extensive warranty protection to some or all third parties, at your option). c) You may charge a distribution fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. Mere aggregation of another unrelated program with this program (or its derivative) on a volume of a storage or distribution medium does not bring the other program under the scope of these terms. 3. You may copy and distribute this program (or a portion or derivative of it, under Paragraph 2) in object code or executable form under the terms of Paragraphs 1 and 2 above provided that you also do one of the following: a) accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Paragraphs 1 and 2 above; or, b) accompany it with a written offer, valid for at least three years, to give any third party free (except for a nominal shipping charge) a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Paragraphs 1 and 2 above; or, c) accompany it with the information you received as to where the corresponding source code may be obtained. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form alone.) For an executable file, complete source code means all the source code for all modules it contains; but, as a special exception, it need not include source code for modules which are standard libraries that accompany the operating system on which the executable file runs. 4. You may not copy, sublicense, distribute or transfer this program except as expressly provided under this License Agreement. Any attempt otherwise to copy, sublicense, distribute or transfer this program is void and your rights to use the program under this License agreement shall be automatically terminated. However, parties who have received computer software programs from you with this License Agreement will not have their licenses terminated so long as such parties remain in full compliance. 5. If you wish to incorporate parts of this program into other free programs whose distribution conditions are different, write to the Free Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not yet worked out a simple rule that can be stated here, but we will often permit this. We will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software. In other words, you are welcome to use, share and improve this program. You are forbidden to forbid anyone else to use, share and improve what you give them. Help stamp out software-hoarding! */ #if (CROSSATARI || atarist || atariminix) #include "gnu-out.h" #else #include #endif #ifdef CROSSATARI #include "stab.h" #include "/usr/include/stdio.h" #ifdef USG #include "/usr/include/string.h" #include "/usr/include/fcntl.h" #include "/usr/include/sys/types.h" #else #include "/usr/include/strings.h" #endif #include "gnu-ar.h" #else #include #include #include #include "gnu-ar.h" #endif #ifdef atarist #include #else #ifdef CROSSATARI #include "/usr/include/sys/file.h" #else #ifdef atariminix #if 0 #define EMUL_OPEN3 #include #else #include #endif #else #include #endif #endif #endif /* If compiled with GNU C, use the built-in alloca */ #ifdef __GNUC__ # define alloca __builtin_alloca #endif /* * Alloca include. */ #if defined(sun) && defined(sparc) #ifdef alloca #undef alloca #endif #include "alloca.h" #endif /* Name of this program. */ char *program_name; /* Number of input files specified. */ int number_of_files; /* Current file's name. */ char *input_name; /* Current member's name, or 0 if processing a non-library file. */ char *input_member; /* Offset within archive of the current member, if we are processing an archive. */ int member_offset; /* Command options. */ int external_only; /* nonzero means print external symbols only. */ int sort_numerically; /* sort in numerical order rather than alphabetic */ int reverse_sort; /* sort in downward (alphabetic or numeric) order. */ int no_sort; /* don't sort; print symbols in order in the file. */ int undefined_only; /* print undefined symbols only. */ int file_on_each_line; /* print file name on each line. */ int debugger_syms; /* print the debugger-only symbols. */ int print_symdefs; /* describe the __.SYMDEF data in any archive file specified. */ int demangle_symbols; /* Demangle G++ symbols. */ /* The __.SYMDEF member of an archive has the following format: 1) A longword saying the size of the symdef data that follows 2) Zero or more struct symdef filling that many bytes 3) A longword saying how many bytes of strings follow 4) That many bytes of string data. */ struct symdef { long stringoffset; /* Offset of this symbol's name in the string data */ long offset; /* Offset in the archive of the header-data for the member that defines this symbol. */ }; void decode_switch (); int decode_arg (); void do_one_file (), do_one_rel_file (), do_symdef_member (); char *concat (); main (argc, argv) char **argv; int argc; { int i; int c; extern int optind; program_name = argv[0]; number_of_files = 0; external_only = 0; sort_numerically = 0; reverse_sort = 0; no_sort = 0; undefined_only = 0; file_on_each_line = 0; debugger_syms = 0; print_symdefs = 0; demangle_symbols = 1; while ((c = getopt (argc, argv, "agnoprsux")) != EOF) switch (c) { case 'a': debugger_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_symdefs = 1; break; case 'u': undefined_only = 1; break; case 'x': demangle_symbols = 0; break; } number_of_files = argc - optind; /* Now scan again and print the files. */ if (argc == optind) do_one_file ("a.out"); else for (i = optind; i < argc; i++) do_one_file (argv[i]); } /* Print the filename of the current file on 'outfile' (a stdio stream). */ print_file_name (outfile) FILE *outfile; { fprintf (outfile, "%s", input_name); if (input_member) fprintf (outfile, "(%s)", input_member); } /* process one input file */ void scan_library (); void do_one_file (name) char *name; { int len, magicnum, desc; desc = open (name, O_RDONLY, 0); if (desc < 0) { perror_name (name); return; } input_name = name; input_member = 0; len = read (desc, &magicnum, sizeof magicnum); if (len != sizeof magicnum) error_with_file ("failure reading header of "); else if (!N_BADMAG (*((struct exec *)&magicnum))) do_one_rel_file (desc, 0); else { char armag[SARMAG]; int nchars; lseek (desc, 0, 0); nchars = read (desc, armag, SARMAG); if (SARMAG != nchars || strncmp (armag, ARMAG, SARMAG)) error_with_file ("malformed input file (not rel or archive) "); else scan_library (desc); } close (desc); } /* Read in the archive data about one member. SUBFILE_OFFSET is the address within the archive of the start of that data. The value returned is the length of the member's contents, which does not include the archive data about the member. A pointer to the member's name is stored into *MEMBER_NAME_PTR. If there are no more valid members, zero is returned. */ int decode_library_subfile (desc, subfile_offset, member_name_ptr) int desc; int subfile_offset; char **member_name_ptr; { int bytes_read; int namelen; int member_length; char *name; struct ar_hdr hdr1; lseek (desc, subfile_offset, 0); #if (defined(WORD_ALIGNED) && defined(CROSSATARI)) bytes_read = read (desc, &hdr1.ar_name, sizeof (hdr1.ar_name)); bytes_read += read (desc, &hdr1.ar_size, sizeof (hdr1.ar_size)); bytes_read += read (desc, &hdr1.ar_date, sizeof (hdr1.ar_date)); bytes_read += read (desc, &hdr1.ar_mode, sizeof (hdr1.ar_mode)); bytes_read += read (desc, &hdr1.ar_uid, sizeof (hdr1.ar_uid)); bytes_read += read (desc, &hdr1.ar_gid, sizeof (hdr1.ar_gid)); bytes_read += read (desc, &hdr1.ar_fmag, sizeof (hdr1.ar_fmag)); #else bytes_read = read (desc, &hdr1, sizeof hdr1); #endif if (!bytes_read) return 0; /* end of archive */ #if (defined(WORD_ALIGNED) && defined(CROSSATARI)) else if (bytes_read != (sizeof (hdr1.ar_name) + sizeof (hdr1.ar_size) + sizeof (hdr1.ar_date) + sizeof (hdr1.ar_mode) + sizeof (hdr1.ar_uid) + sizeof (hdr1.ar_gid) + sizeof (hdr1.ar_fmag))) error_with_file ("malformed library archive "); #else else if (sizeof hdr1 != bytes_read) error_with_file ("malformed library archive "); #endif else if (sscanf (hdr1.ar_size, "%d", &member_length) != 1) error_with_file ("malformatted header of archive member in "); else { for (namelen = 0; ; namelen++) if (hdr1.ar_name[namelen] == 0 || hdr1.ar_name[namelen] == ' ') break; name = (char *) xmalloc (namelen+1); strncpy (name, hdr1.ar_name, namelen); name[namelen] = 0; *member_name_ptr = name; return member_length; } return 0; /* tell caller to exit loop */ } /* Scan a library and describe each member. */ void scan_library (desc) int desc; { int this_subfile_offset = SARMAG; int member_length; #if (defined(WORD_ALIGNED) && defined(CROSSATARI)) struct ar_hdr hdr1; #endif if (!file_on_each_line) printf ("\n%s:\n", input_name); while (1) { member_length = decode_library_subfile (desc, this_subfile_offset, &input_member); if (member_length == 0) break; /* Describe every member except the ranlib data if any. */ #if (defined(WORD_ALIGNED) && defined(CROSSATARI)) if (strcmp (input_member, "__.SYMDEF")) do_one_rel_file (desc, this_subfile_offset + (sizeof (hdr1.ar_name) + sizeof (hdr1.ar_size) + sizeof (hdr1.ar_date) + sizeof (hdr1.ar_mode) + sizeof (hdr1.ar_uid) + sizeof (hdr1.ar_gid) + sizeof (hdr1.ar_fmag))); else if (print_symdefs) do_symdef_member (desc, this_subfile_offset + (sizeof (hdr1.ar_name) + sizeof (hdr1.ar_size) + sizeof (hdr1.ar_date) + sizeof (hdr1.ar_mode) + sizeof (hdr1.ar_uid) + sizeof (hdr1.ar_gid) + sizeof (hdr1.ar_fmag)), member_length); this_subfile_offset += ((member_length + (sizeof (hdr1.ar_name) + sizeof (hdr1.ar_size) + sizeof (hdr1.ar_date) + sizeof (hdr1.ar_mode) + sizeof (hdr1.ar_uid) + sizeof (hdr1.ar_gid) + sizeof (hdr1.ar_fmag))) + 1) & -2; #else if (strcmp (input_member, "__.SYMDEF")) do_one_rel_file (desc, this_subfile_offset + sizeof (struct ar_hdr)); else if (print_symdefs) do_symdef_member (desc, this_subfile_offset + sizeof (struct ar_hdr), member_length); this_subfile_offset += ((member_length + sizeof (struct ar_hdr)) + 1) & -2; #endif } } void print_symbols (), print_one_symbol (); void read_header (); int alphacompare (), valuecompare (); int filter_symbols (); char *cplus_demangle(); void do_one_rel_file (desc, offset) int desc; int offset; { struct exec header; /* file header read in here */ int string_size; struct nlist *symbols_and_strings; int symcount; int totalsize; char *strings; #if 0 header.a_magic = 0; #else N_SET_MAGIC(header, 0); #endif read_header (desc, &header, offset); if (N_BADMAG (header)) { error_with_file ("bad magic number in "); return; } /* Read the string-table-length out of the file. */ lseek (desc, N_STROFF (header) + offset, 0); if (sizeof string_size != read (desc, &string_size, sizeof string_size)) { error_with_file ("bad string table in "); return; } /* Number of symbol entries in the file. */ symcount = header.a_syms / sizeof (struct nlist); totalsize = string_size + header.a_syms; /* Allocate space for symbol entries and string table. */ symbols_and_strings = (struct nlist *) xmalloc (totalsize); strings = (char *) symbols_and_strings + header.a_syms; /* Read them both in all at once. */ lseek (desc, N_SYMOFF (header) + offset, 0); if (totalsize != read (desc, symbols_and_strings, totalsize)) { error_with_file ("premature end of file in symbols/strings of "); return; } /* Identify this file, if desired. */ if (!file_on_each_line && (number_of_files > 1 || input_member)) printf ("\n%s:\n", input_member ? input_member : input_name); /* Discard the symbols we don't want to print; compact the rest down. */ symcount = filter_symbols (symbols_and_strings, symcount, strings); /* Modify each symbol entry to point directly at the symbol name. This is so the sort routine does not need to be passed the value of `strings' separately. */ { struct nlist *p = symbols_and_strings; struct nlist *end = symbols_and_strings + symcount; for (; p < end; p++) if (p->n_un.n_strx) p->n_un.n_name = strings + p->n_un.n_strx; } /* Sort the symbols if desired. */ if (!no_sort) qsort (symbols_and_strings, symcount, sizeof (struct nlist), sort_numerically ? valuecompare : alphacompare); /* Print the symbols in the order they are now in. */ print_symbols (symbols_and_strings, symcount); free (symbols_and_strings); } /* Read a file's header. */ void read_header (desc, loc, offset) int desc; struct exec *loc; int offset; { int len; lseek (desc, offset, 0); len = read (desc, loc, sizeof (struct exec)); if (len != sizeof (struct exec)) error_with_file ("failure reading header of "); } /* Choose which symbol entries to print; compact them downward to get rid of the rest. Return the number of symbols to be printed. */ int filter_symbols (syms, symcount, strings) struct nlist *syms; int symcount; char *strings; { struct nlist *from = syms, *to = syms; struct nlist *end = syms + symcount; while (from < end) { int keep = 0; /* undefined sym or common sym */ if (from->n_type == N_EXT) keep = !undefined_only || !from->n_value; /* global defined sym */ else if (from->n_type & N_EXT) keep = !undefined_only; /* debugger sym: normally don't print */ else if (from->n_type & ~(N_TYPE | N_EXT)) keep = debugger_syms; /* local sym */ else keep = !external_only && !undefined_only; if (keep) *to++ = *from; from++; } return to - syms; } /* Comparison functions for sorting symbols. */ int alphacompare (sym1, sym2) struct nlist *sym1, *sym2; { if (reverse_sort) { if (!sym2->n_un.n_name) { if (sym1->n_un.n_name) return -1; else return 0; } if (!sym1->n_un.n_name) return 1; return strcmp (sym2->n_un.n_name, sym1->n_un.n_name); } else { if (!sym1->n_un.n_name) { if (sym2->n_un.n_name) return -1; else return 0; } if (!sym2->n_un.n_name) return 1; return strcmp (sym1->n_un.n_name, sym2->n_un.n_name); } } int valuecompare (sym1, sym2) struct nlist *sym1, *sym2; { if (reverse_sort) return sym2->n_value - sym1->n_value; else return sym1->n_value - sym2->n_value; } void print_symbols (syms, symcount) struct nlist *syms; int symcount; { int i; for (i = 0; i < symcount; i++) print_one_symbol (&syms[i]); } void print_one_symbol (sym) struct nlist *sym; { if (file_on_each_line) { print_file_name (stdout); printf (":"); } if (undefined_only) { if (sym->n_type == N_EXT && !sym->n_value) printf ("%s\n", sym->n_un.n_name); return; } if (sym->n_type & ~N_EXT || sym->n_value) printf ("%08x ", sym->n_value); else printf (" "); switch (sym->n_type) { case N_EXT: if (sym->n_value) printf ("C"); else printf ("U"); break; case 0: if (sym->n_value) printf ("c"); else printf ("u"); break; case N_ABS | N_EXT: printf ("A"); break; case N_ABS: printf ("a"); break; case N_TEXT | N_EXT: printf ("T"); break; case N_TEXT: printf ("t"); break; case N_DATA | N_EXT: printf ("D"); break; case N_DATA: printf ("d"); break; case N_BSS | N_EXT: printf ("B"); break; case N_BSS: printf ("b"); break; default: { char *s; switch (sym->n_type) { case N_GSYM: s = "GSYM"; break; case N_FNAME: s = "FNAME"; break; case N_FUN: s = "FUN"; break; case N_STSYM: s = "STSYM"; break; case N_LCSYM: s = "LCSYM"; break; case N_RSYM: s = "RSYM"; break; case N_SLINE: s = "SLINE"; break; case N_SSYM: s = "SSYM"; break; case N_SO: s = "SO"; break; case N_LSYM: s = "LSYM"; break; case N_SOL: s = "SOL"; break; case N_PSYM: s = "PSYM"; break; case N_ENTRY: s = "ENTRY"; break; case N_LBRAC: s = "LBRAC"; break; case N_RBRAC: s = "RBRAC"; break; case N_BCOMM: s = "BCOMM"; break; case N_ECOMM: s = "ECOMM"; break; case N_ECOML: s = "ECOML"; break; case N_LENG: s = "LENG"; break; default: s = ""; } printf ("- %02x %04x %5s", sym->n_other, sym->n_desc, s); } } if (sym->n_un.n_name) { if (demangle_symbols) { char *nm; if ((nm = cplus_demangle(sym->n_un.n_name)) == NULL) printf (" %s\n", sym->n_un.n_name); else { printf (" %s\n", nm); free(nm); } } else { printf (" %s\n", sym->n_un.n_name); } } else { printf (" \n"); } } void do_symdef_member (desc, offset, member_length) int desc; int offset; int member_length; { int symdef_size; int nsymdefs; struct symdef *symdefs; int stringsize; char *strings; int i; char *member_name; int member_offset; /* read the string-table-length out of the file */ lseek (desc, offset, 0); if (sizeof symdef_size != read (desc, &symdef_size, sizeof symdef_size)) { error_with_file ("premature eof in "); return; } if (symdef_size < 0) { error_with_file ("invalid size value in "); return; } nsymdefs = symdef_size / sizeof (struct symdef); symdefs = (struct symdef *) alloca (symdef_size); if (symdef_size != read (desc, symdefs, symdef_size)) { error_with_file ("premature eof in "); return; } if (stringsize < 0) { error_with_file ("invalid size value in "); return; } if (sizeof stringsize != read (desc, &stringsize, sizeof stringsize)) { error_with_file ("premature eof in "); return; } strings = (char *) alloca (stringsize); if (stringsize != read (desc, strings, stringsize)) { error_with_file ("premature eof in "); return; } if (stringsize + symdef_size + sizeof stringsize + sizeof symdef_size != member_length) { error_with_file ("size of data isn't what the data calls for in "); return; } if (!file_on_each_line && (number_of_files > 1 || input_member)) printf ("\n%s:\n", input_member ? input_member : input_name); member_offset = -1; for (i = 0; i < nsymdefs; i++) { if (symdefs[i].stringoffset < 0 || symdefs[i].stringoffset >= stringsize) { error_with_file ("invalid entry in "); return; } if (member_offset != symdefs[i].offset) { member_offset = symdefs[i].offset; decode_library_subfile (desc, member_offset, &member_name); } if (file_on_each_line) { print_file_name (stdout); printf (":"); } printf ("%s in %s\n", symdefs[i].stringoffset + strings, member_name); } } /* Report a fatal error. STRING is a printf format string and ARG is one arg for it. */ fatal (string, arg) char *string, *arg; { fprintf (stderr, "%s: ", program_name); fprintf (stderr, string, arg); fprintf (stderr, "\n"); exit (1); } /* Report a nonfatal error. STRING is a printf format string and ARG is one arg for it. */ error (string, arg) char *string, *arg; { fprintf (stderr, "%s: ", program_name); fprintf (stderr, string, arg); fprintf (stderr, "\n"); } /* Report a nonfatal error. STRING is printed, followed by the current file name. */ error_with_file (string) char *string; { fprintf (stderr, "%s: ", program_name); fprintf (stderr, string); print_file_name (stderr); fprintf (stderr, "\n"); } /* Report a fatal error using the message for the last failed system call, followed by the string NAME. */ perror_name (name) char *name; { extern int errno, sys_nerr; extern char *sys_errlist[]; char *s; if (errno < sys_nerr) s = concat ("", sys_errlist[errno], " for %s"); else s = "cannot open %s"; error (s, name); } /* Like malloc but get fatal error if memory is exhausted. */ int xmalloc (size) int size; { int result = malloc (size); if (!result) fatal ("virtual memory exhausted", 0); return result; } /* Like realloc but get fatal error if memory is exhausted. */ int xrealloc (ptr, size) char *ptr; int size; { register int result = realloc (ptr, size); if (!result) fatal ("virtual memory exhausted", 0); return result; } /* Return a newly-allocated string whose contents concatenate those of S1, S2, S3. */ char * concat (s1, s2, s3) char *s1, *s2, *s3; { int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); char *result = (char *) xmalloc (len1 + len2 + len3 + 1); strcpy (result, s1); strcpy (result + len1, s2); strcpy (result + len1 + len2, s3); *(result + len1 + len2 + len3) = 0; return result; }