/* nlmconv.c -- NLM conversion program Copyright (C) 1993 Free Software Foundation, Inc. This file is part of GNU Binutils. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Written by Ian Lance Taylor . This program can be used to convert any appropriate object file into a NetWare Loadable Module (an NLM). It will accept a linker specification file which is identical to that accepted by the NetWare linker, NLMLINK, except that the INPUT command, normally used to give a list of object files to link together, is not used. This program will convert only a single object file. */ #include #include #include #include #include #include #include #include #include "sysdep.h" #include "bucomm.h" /* Internal BFD NLM header. */ #include "libnlm.h" #include "nlmconv.h" /* If strerror is just a macro, we want to use the one from libiberty since it will handle undefined values. */ #undef strerror extern char *strerror (); #ifndef localtime extern struct tm *localtime (); #endif #ifndef SEEK_SET #define SEEK_SET 0 #endif /* Global variables. */ /* The name used to invoke the program. */ char *program_name; /* The version number. */ extern char *program_version; /* Local variables. */ /* The symbol table. */ static asymbol **symbols; /* The total amount of bss space. */ static bfd_size_type total_bss_size; /* The list of long options. */ static struct option long_options[] = { { "header-info", required_argument, 0, 'T' }, { "help", no_argument, 0, 'h' }, { "input-format", required_argument, 0, 'I' }, { "output-format", required_argument, 0, 'O' }, { "version", no_argument, 0, 'V' }, { NULL, no_argument, 0, 0 } }; /* Local routines. */ static void show_help PARAMS ((void)); static void show_usage PARAMS ((FILE *, int)); static const char *select_output_format PARAMS ((enum bfd_architecture, long, boolean)); static void setup_sections PARAMS ((bfd *, asection *, PTR)); static void copy_sections PARAMS ((bfd *, asection *, PTR)); static void mangle_relocs PARAMS ((bfd *, asection *, arelent **, bfd_size_type *, char *, bfd_size_type)); static void i386_mangle_relocs PARAMS ((bfd *, asection *, arelent **, bfd_size_type *, char *, bfd_size_type)); /* The main routine. */ int main (argc, argv) int argc; char **argv; { int opt; const char *input_format = NULL; const char *output_format = NULL; const char *header_file = NULL; bfd *inbfd; bfd *outbfd; asymbol **newsyms, **outsyms; unsigned int symcount, newsymalloc, newsymcount; asection *bss_sec; asymbol *endsym; unsigned int i; char inlead, outlead; boolean gotstart, gotexit, gotcheck; struct stat st; FILE *custom_data, *help_data, *message_data, *rpc_data, *shared_data; bfd_size_type custom_size, help_size, message_size, module_size, rpc_size; asection *custom_section, *help_section, *message_section, *module_section; asection *rpc_section, *shared_section; bfd *sharedbfd; bfd_size_type shared_offset, shared_size; Nlm_Internal_Fixed_Header sharedhdr; int len; program_name = argv[0]; bfd_init (); while ((opt = getopt_long (argc, argv, "hI:O:T:V", long_options, (int *) 0)) != EOF) { switch (opt) { case 'h': show_help (); /*NOTREACHED*/ case 'I': input_format = optarg; break; case 'O': output_format = optarg; break; case 'T': header_file = optarg; break; case 'V': printf ("GNU %s version %s\n", program_name, program_version); exit (0); /*NOTREACHED*/ case 0: break; default: show_usage (stderr, 1); /*NOTREACHED*/ } } if (optind + 2 != argc) show_usage (stderr, 1); if (strcmp (argv[optind], argv[optind + 1]) == 0) { fprintf (stderr, "%s: input and output files must be different\n", program_name); exit (1); } inbfd = bfd_openr (argv[optind], input_format); if (inbfd == NULL) bfd_fatal (argv[optind]); if (! bfd_check_format (inbfd, bfd_object)) bfd_fatal (argv[optind]); if (output_format == NULL) output_format = select_output_format (bfd_get_arch (inbfd), bfd_get_mach (inbfd), inbfd->xvec->byteorder_big_p); assert (output_format != NULL); outbfd = bfd_openw (argv[optind + 1], output_format); if (outbfd == NULL) bfd_fatal (argv[optind + 1]); if (! bfd_set_format (outbfd, bfd_object)) bfd_fatal (argv[optind + 1]); assert (outbfd->xvec->flavour == bfd_target_nlm_flavour); if (bfd_arch_get_compatible (inbfd, outbfd) == NULL) fprintf (stderr, "%s: warning:input and output formats are not compatible\n", program_name); /* Initialize the header information to default values. */ fixed_hdr = nlm_fixed_header (outbfd); var_hdr = nlm_variable_header (outbfd); version_hdr = nlm_version_header (outbfd); copyright_hdr = nlm_copyright_header (outbfd); extended_hdr = nlm_extended_header (outbfd); check_procedure = NULL; custom_file = NULL; debug_info = false; exit_procedure = "_Stop"; export_symbols = NULL; map_file = NULL; full_map = false; help_file = NULL; import_symbols = NULL; message_file = NULL; modules = NULL; sharelib_file = NULL; start_procedure = "_Prelude"; verbose = false; rpc_file = NULL; parse_errors = 0; /* Parse the header file (if there is one). */ if (header_file != NULL) { if (! nlmlex_file (header_file) || yyparse () != 0 || parse_errors != 0) exit (1); } /* Start copying the input BFD to the output BFD. */ if (! bfd_set_file_flags (outbfd, bfd_get_file_flags (inbfd))) bfd_fatal (bfd_get_filename (outbfd)); symbols = (asymbol **) xmalloc (get_symtab_upper_bound (inbfd)); symcount = bfd_canonicalize_symtab (inbfd, symbols); /* Make sure we have a .bss section. Doing this first is an attempt to ensure that it will be the first bss section. */ bss_sec = bfd_get_section_by_name (outbfd, NLM_UNINITIALIZED_DATA_NAME); if (bss_sec == NULL) { bss_sec = bfd_make_section (outbfd, NLM_UNINITIALIZED_DATA_NAME); if (bss_sec == NULL) bfd_fatal ("make .bss section"); bss_sec->flags = SEC_ALLOC; bss_sec->alignment_power = bfd_log2 (0); /* FIXME */ } /* Set up the sections. */ bfd_map_over_sections (inbfd, setup_sections, (PTR) outbfd); /* Adjust symbol information. */ inlead = bfd_get_symbol_leading_char (inbfd); outlead = bfd_get_symbol_leading_char (outbfd); gotstart = false; gotexit = false; gotcheck = false; newsymalloc = 10; newsyms = (asymbol **) xmalloc (newsymalloc * sizeof (asymbol *)); newsymcount = 0; endsym = NULL; for (i = 0; i < symcount; i++) { register asymbol *sym; sym = symbols[i]; /* Add or remove a leading underscore. */ if (inlead != outlead) { if (inlead != '\0') { if (bfd_asymbol_name (sym)[0] == inlead) { if (outlead == '\0') ++sym->name; else { char *new; new = xmalloc (strlen (bfd_asymbol_name (sym)) + 1); new[0] = outlead; strcpy (new + 1, bfd_asymbol_name (sym) + 1); sym->name = new; } } } else { char *new; new = xmalloc (strlen (bfd_asymbol_name (sym)) + 2); new[0] = outlead; strcpy (new + 1, bfd_asymbol_name (sym)); sym->name = new; } } /* NLM's have an uninitialized data section, but they do not have a common section in the Unix sense. Move all common symbols into the .bss section, and mark them as exported. */ if (bfd_is_com_section (bfd_get_section (sym))) { bfd_vma size; bfd_size_type align; sym->section = bss_sec; size = sym->value; sym->value = bss_sec->_raw_size; bss_sec->_raw_size += size; align = 1 << bss_sec->alignment_power; bss_sec->_raw_size = (bss_sec->_raw_size + align - 1) &~ (align - 1); total_bss_size += bss_sec->_raw_size - sym->value; sym->flags |= BSF_EXPORT | BSF_GLOBAL; } /* Force _edata and _end to be defined. This would normally be done by the linker, but the manipulation of the common symbols will confuse it. */ if (bfd_asymbol_name (sym)[0] == '_' && bfd_get_section (sym) == &bfd_und_section) { if (strcmp (bfd_asymbol_name (sym), "_edata") == 0) { sym->section = bss_sec; sym->value = 0; } if (strcmp (bfd_asymbol_name (sym), "_end") == 0) { sym->section = bss_sec; endsym = sym; } } /* If this is a global symbol, check the export list. */ if ((sym->flags & (BSF_EXPORT | BSF_GLOBAL)) != 0) { register struct string_list *l; int found_simple; /* Unfortunately, a symbol can appear multiple times on the export list, with and without prefixes. */ found_simple = 0; for (l = export_symbols; l != NULL; l = l->next) { if (strcmp (l->string, bfd_asymbol_name (sym)) == 0) found_simple = 1; else { char *zbase; zbase = strchr (l->string, '@'); if (zbase != NULL && strcmp (zbase + 1, bfd_asymbol_name (sym)) == 0) { /* We must add a symbol with this prefix. */ if (newsymcount >= newsymalloc) { newsymalloc += 10; newsyms = ((asymbol **) xrealloc (newsyms, (newsymalloc * sizeof (asymbol *)))); } newsyms[newsymcount] = (asymbol *) xmalloc (sizeof (asymbol)); *newsyms[newsymcount] = *sym; newsyms[newsymcount]->name = l->string; ++newsymcount; } } } if (! found_simple) { /* The unmodified symbol is actually not exported at all. */ sym->flags &=~ (BSF_GLOBAL | BSF_EXPORT); sym->flags |= BSF_LOCAL; } } /* If it's an undefined symbol, see if it's on the import list. Change the prefix if necessary. */ if (bfd_get_section (sym) == &bfd_und_section && import_symbols != NULL) { register struct string_list *l; for (l = import_symbols; l != NULL; l = l->next) { if (strcmp (l->string, bfd_asymbol_name (sym)) == 0) break; else { char *zbase; zbase = strchr (l->string, '@'); if (zbase != NULL && strcmp (zbase + 1, bfd_asymbol_name (sym)) == 0) { sym->name = l->string; break; } } } if (l == NULL) fprintf (stderr, "%s: warning: symbol %s imported but not in import list\n", program_name, bfd_asymbol_name (sym)); } /* See if it's one of the special named symbols. */ if (strcmp (bfd_asymbol_name (sym), start_procedure) == 0) { if (! bfd_set_start_address (outbfd, bfd_asymbol_value (sym))) bfd_fatal ("set start address"); gotstart = true; } if (strcmp (bfd_asymbol_name (sym), exit_procedure) == 0) { nlm_fixed_header (outbfd)->exitProcedureOffset = bfd_asymbol_value (sym); gotexit = true; } if (check_procedure != NULL && strcmp (bfd_asymbol_name (sym), check_procedure) == 0) { nlm_fixed_header (outbfd)->checkUnloadProcedureOffset = bfd_asymbol_value (sym); gotcheck = true; } } if (endsym != NULL) endsym->value = total_bss_size; if (newsymcount == 0) outsyms = symbols; else { outsyms = (asymbol **) xmalloc ((symcount + newsymcount + 1) * sizeof (asymbol *)); memcpy (outsyms, symbols, symcount * sizeof (asymbol *)); memcpy (outsyms + symcount, newsyms, newsymcount * sizeof (asymbol *)); outsyms[symcount + newsymcount] = NULL; } bfd_set_symtab (outbfd, outsyms, symcount + newsymcount); if (! gotstart) fprintf (stderr, "%s: warning: START procedure %s not defined\n", program_name, start_procedure); if (! gotexit) fprintf (stderr, "%s: warning: EXIT procedure %s not defined\n", program_name, exit_procedure); if (check_procedure != NULL && ! gotcheck) fprintf (stderr, "%s: warning: CHECK procedure %s not defined\n", program_name, check_procedure); /* Add additional sections required for the header information. */ if (custom_file != NULL) { custom_data = fopen (custom_file, "r"); if (custom_data == NULL || fstat (fileno (custom_data), &st) < 0) { fprintf (stderr, "%s:%s: %s\n", program_name, custom_file, strerror (errno)); custom_file = NULL; } else { custom_size = st.st_size; custom_section = bfd_make_section (outbfd, ".nlmcustom"); if (custom_section == NULL || ! bfd_set_section_size (outbfd, custom_section, custom_size) || ! bfd_set_section_flags (outbfd, custom_section, SEC_HAS_CONTENTS)) bfd_fatal ("custom section"); } } if (help_file != NULL) { help_data = fopen (help_file, "r"); if (help_data == NULL || fstat (fileno (help_data), &st) < 0) { fprintf (stderr, "%s:%s: %s\n", program_name, help_file, strerror (errno)); help_file = NULL; } else { help_size = st.st_size; help_section = bfd_make_section (outbfd, ".nlmhelp"); if (help_section == NULL || ! bfd_set_section_size (outbfd, help_section, help_size) || ! bfd_set_section_flags (outbfd, help_section, SEC_HAS_CONTENTS)) bfd_fatal ("help section"); strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8); } } if (message_file != NULL) { message_data = fopen (message_file, "r"); if (message_data == NULL || fstat (fileno (message_data), &st) < 0) { fprintf (stderr, "%s:%s: %s\n", program_name, message_file, strerror (errno)); message_file = NULL; } else { message_size = st.st_size; message_section = bfd_make_section (outbfd, ".nlmmessages"); if (message_section == NULL || ! bfd_set_section_size (outbfd, message_section, message_size) || ! bfd_set_section_flags (outbfd, message_section, SEC_HAS_CONTENTS)) bfd_fatal ("message section"); strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8); } } if (modules != NULL) { struct string_list *l; module_size = 0; for (l = modules; l != NULL; l = l->next) module_size += strlen (l->string) + 1; module_section = bfd_make_section (outbfd, ".nlmmodules"); if (module_section == NULL || ! bfd_set_section_size (outbfd, module_section, module_size) || ! bfd_set_section_flags (outbfd, module_section, SEC_HAS_CONTENTS)) bfd_fatal ("module section"); } if (rpc_file != NULL) { rpc_data = fopen (rpc_file, "r"); if (rpc_data == NULL || fstat (fileno (rpc_data), &st) < 0) { fprintf (stderr, "%s:%s: %s\n", program_name, rpc_file, strerror (errno)); rpc_file = NULL; } else { rpc_size = st.st_size; rpc_section = bfd_make_section (outbfd, ".nlmrpc"); if (rpc_section == NULL || ! bfd_set_section_size (outbfd, rpc_section, rpc_size) || ! bfd_set_section_flags (outbfd, rpc_section, SEC_HAS_CONTENTS)) bfd_fatal ("rpc section"); strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8); } } if (sharelib_file != NULL) { sharedbfd = bfd_openr (sharelib_file, output_format); if (sharedbfd == NULL || ! bfd_check_format (sharedbfd, bfd_object)) { fprintf (stderr, "%s:%s: %s\n", program_name, sharelib_file, bfd_errmsg (bfd_error)); sharelib_file = NULL; } else { sharedhdr = *nlm_fixed_header (sharedbfd); bfd_close (sharedbfd); shared_data = fopen (sharelib_file, "r"); if (shared_data == NULL || (fstat (fileno (shared_data), &st) < 0)) { fprintf (stderr, "%s:%s: %s\n", program_name, sharelib_file, strerror (errno)); sharelib_file = NULL; } else { /* If we were clever, we could just copy out the sections of the shared library which we actually need. However, we would have to figure out the sizes of the external and public information, and that can not be done without reading through them. */ shared_offset = st.st_size; if (shared_offset > sharedhdr.codeImageOffset) shared_offset = sharedhdr.codeImageOffset; if (shared_offset > sharedhdr.dataImageOffset) shared_offset = sharedhdr.dataImageOffset; if (shared_offset > sharedhdr.relocationFixupOffset) shared_offset = sharedhdr.relocationFixupOffset; if (shared_offset > sharedhdr.externalReferencesOffset) shared_offset = sharedhdr.externalReferencesOffset; if (shared_offset > sharedhdr.publicsOffset) shared_offset = sharedhdr.publicsOffset; shared_size = st.st_size - shared_offset; shared_section = bfd_make_section (outbfd, ".nlmshared"); if (shared_section == NULL || ! bfd_set_section_size (outbfd, shared_section, shared_size) || ! bfd_set_section_flags (outbfd, shared_section, SEC_HAS_CONTENTS)) bfd_fatal ("shared section"); strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8); } } } /* Check whether a version was given. */ if (strncmp (version_hdr->stamp, "VeRsIoN#", 8) != 0) fprintf (stderr, "%s: warning: No version number given\n", program_name); /* At least for now, always create an extended header, because that is what NLMLINK does. */ strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8); /* If the date was not given, force it in. */ if (nlm_version_header (outbfd)->month == 0 && nlm_version_header (outbfd)->day == 0 && nlm_version_header (outbfd)->year == 0) { unsigned long now; /* FIXME: should be time_t. */ struct tm *ptm; time (&now); ptm = localtime (&now); nlm_version_header (outbfd)->month = ptm->tm_mon + 1; nlm_version_header (outbfd)->day = ptm->tm_mday; nlm_version_header (outbfd)->year = ptm->tm_year + 1900; strncpy (version_hdr->stamp, "VeRsIoN#", 8); } /* Copy over the sections. */ bfd_map_over_sections (inbfd, copy_sections, (PTR) outbfd); /* Finish up the header information. */ if (custom_file != NULL) { PTR data; data = xmalloc (custom_size); if (fread (data, 1, custom_size, custom_data) != custom_size) fprintf (stderr, "%s:%s: read: %s\n", program_name, custom_file, strerror (errno)); else { if (! bfd_set_section_contents (outbfd, custom_section, data, (file_ptr) 0, custom_size)) bfd_fatal ("custom section"); nlm_fixed_header (outbfd)->customDataOffset = custom_section->filepos; nlm_fixed_header (outbfd)->customDataSize = custom_size; } free (data); } if (! debug_info) { /* As a special hack, the backend recognizes a debugInfoOffset of -1 to mean that it should not output any debugging information. This can not be handling by fiddling with the symbol table because exported symbols appear in both the export information and the debugging information. */ nlm_fixed_header (outbfd)->debugInfoOffset = (file_ptr) -1; } if (map_file != NULL) fprintf (stderr, "%s: MAP and FULLMAP are not supported; try ld -M\n", program_name); if (help_file != NULL) { PTR data; data = xmalloc (help_size); if (fread (data, 1, help_size, help_data) != help_size) fprintf (stderr, "%s:%s: read: %s\n", program_name, help_file, strerror (errno)); else { if (! bfd_set_section_contents (outbfd, help_section, data, (file_ptr) 0, help_size)) bfd_fatal ("help section"); nlm_extended_header (outbfd)->helpFileOffset = help_section->filepos; nlm_extended_header (outbfd)->helpFileLength = help_size; } free (data); } if (message_file != NULL) { PTR data; data = xmalloc (message_size); if (fread (data, 1, message_size, message_data) != message_size) fprintf (stderr, "%s:%s: read: %s\n", program_name, message_file, strerror (errno)); else { if (! bfd_set_section_contents (outbfd, message_section, data, (file_ptr) 0, message_size)) bfd_fatal ("message section"); nlm_extended_header (outbfd)->messageFileOffset = message_section->filepos; nlm_extended_header (outbfd)->messageFileLength = message_size; /* FIXME: Are these offsets correct on all platforms? Are they 32 bits on all platforms? What endianness? */ nlm_extended_header (outbfd)->languageID = bfd_h_get_32 (outbfd, (bfd_byte *) data + 106); nlm_extended_header (outbfd)->messageCount = bfd_h_get_32 (outbfd, (bfd_byte *) data + 110); } free (data); } if (modules != NULL) { PTR data; char *set; struct string_list *l; bfd_size_type c; data = xmalloc (module_size); c = 0; set = (char *) data; for (l = modules; l != NULL; l = l->next) { *set = strlen (l->string); strncpy (set + 1, l->string, *set); set += *set + 1; ++c; } if (! bfd_set_section_contents (outbfd, module_section, data, (file_ptr) 0, module_size)) bfd_fatal ("module section"); nlm_fixed_header (outbfd)->moduleDependencyOffset = module_section->filepos; nlm_fixed_header (outbfd)->numberOfModuleDependencies = c; } if (rpc_file != NULL) { PTR data; data = xmalloc (rpc_size); if (fread (data, 1, rpc_size, rpc_data) != rpc_size) fprintf (stderr, "%s:%s: read: %s\n", program_name, rpc_file, strerror (errno)); else { if (! bfd_set_section_contents (outbfd, rpc_section, data, (file_ptr) 0, rpc_size)) bfd_fatal ("rpc section"); nlm_extended_header (outbfd)->RPCDataOffset = rpc_section->filepos; nlm_extended_header (outbfd)->RPCDataLength = rpc_size; } free (data); } if (sharelib_file != NULL) { PTR data; data = xmalloc (shared_size); if (fseek (shared_data, shared_offset, SEEK_SET) != 0 || fread (data, 1, shared_size, shared_data) != shared_size) fprintf (stderr, "%s:%s: read: %s\n", program_name, sharelib_file, strerror (errno)); else { if (! bfd_set_section_contents (outbfd, shared_section, data, (file_ptr) 0, shared_size)) bfd_fatal ("shared section"); } nlm_extended_header (outbfd)->sharedCodeOffset = sharedhdr.codeImageOffset - shared_offset + shared_section->filepos; nlm_extended_header (outbfd)->sharedCodeLength = sharedhdr.codeImageSize; nlm_extended_header (outbfd)->sharedDataOffset = sharedhdr.dataImageOffset - shared_offset + shared_section->filepos; nlm_extended_header (outbfd)->sharedDataLength = sharedhdr.dataImageSize; nlm_extended_header (outbfd)->sharedRelocationFixupOffset = (sharedhdr.relocationFixupOffset - shared_offset + shared_section->filepos); nlm_extended_header (outbfd)->sharedRelocationFixupCount = sharedhdr.numberOfRelocationFixups; nlm_extended_header (outbfd)->sharedExternalReferenceOffset = (sharedhdr.externalReferencesOffset - shared_offset + shared_section->filepos); nlm_extended_header (outbfd)->sharedExternalReferenceCount = sharedhdr.numberOfExternalReferences; nlm_extended_header (outbfd)->sharedPublicsOffset = sharedhdr.publicsOffset - shared_offset + shared_section->filepos; nlm_extended_header (outbfd)->sharedPublicsCount = sharedhdr.numberOfPublics; nlm_extended_header (outbfd)->SharedInitializationOffset = sharedhdr.codeStartOffset; nlm_extended_header (outbfd)->SharedExitProcedureOffset = sharedhdr.exitProcedureOffset; free (data); } len = strlen (argv[optind + 1]); if (len > NLM_MODULE_NAME_SIZE - 2) len = NLM_MODULE_NAME_SIZE - 2; nlm_fixed_header (outbfd)->moduleName[0] = len; strncpy (nlm_fixed_header (outbfd)->moduleName + 1, argv[optind + 1], NLM_MODULE_NAME_SIZE - 2); nlm_fixed_header (outbfd)->moduleName[NLM_MODULE_NAME_SIZE - 1] = '\0'; strncpy (nlm_variable_header (outbfd)->oldThreadName, " LONG", NLM_OLD_THREAD_NAME_LENGTH); if (! bfd_close (outbfd)) bfd_fatal (argv[optind + 1]); if (! bfd_close (inbfd)) bfd_fatal (argv[optind]); return 0; } /* Display a help message and exit. */ static void show_help () { printf ("%s: Convert an object file into a NetWare Loadable Module\n", program_name); show_usage (stdout, 0); } /* Show a usage message and exit. */ static void show_usage (file, status) FILE *file; int status; { fprintf (file, "\ Usage: %s [-hV] [-I format] [-O format] [-T header-file]\n\ [--input-format=format] [--output-format=format]\n\ [--header-file=file] [--help] [--version]\n\ in-file out-file\n", program_name); exit (status); } /* Select the output format based on the input architecture, machine, and endianness. This chooses the appropriate NLM target. */ static const char * select_output_format (arch, mach, bigendian) enum bfd_architecture arch; long mach; boolean bigendian; { switch (arch) { case bfd_arch_i386: return "nlm32-i386"; default: fprintf (stderr, "%s: no default NLM format for %s\n", program_name, bfd_printable_arch_mach (arch, mach)); exit (1); /* Avoid warning. */ return NULL; } /*NOTREACHED*/ } /* The BFD sections are copied in two passes. This function sets up the section name, size, etc. */ static void setup_sections (inbfd, insec, data_ptr) bfd *inbfd; asection *insec; PTR data_ptr; { bfd *outbfd = (bfd *) data_ptr; asection *outsec; flagword f; outsec = bfd_get_section_by_name (outbfd, bfd_section_name (inbfd, insec)); if (outsec == NULL) { outsec = bfd_make_section (outbfd, bfd_section_name (inbfd, insec)); if (outsec == NULL) bfd_fatal ("make section"); } insec->output_section = outsec; insec->output_offset = 0; if (! bfd_set_section_size (outbfd, outsec, bfd_section_size (inbfd, insec))) bfd_fatal ("set section size"); if (! bfd_set_section_vma (outbfd, outsec, bfd_section_vma (inbfd, insec))) bfd_fatal ("set section vma"); if (! bfd_set_section_alignment (outbfd, outsec, bfd_section_alignment (inbfd, insec))) bfd_fatal ("set section alignment"); f = bfd_get_section_flags (inbfd, insec); if (! bfd_set_section_flags (outbfd, outsec, f)) bfd_fatal ("set section flags"); if ((f & SEC_LOAD) == 0 && (f & SEC_ALLOC) != 0) total_bss_size += bfd_section_size (inbfd, insec); } /* Copy the section contents. */ static void copy_sections (inbfd, insec, data_ptr) bfd *inbfd; asection *insec; PTR data_ptr; { bfd *outbfd = (bfd *) data_ptr; asection *outsec; bfd_size_type size; PTR contents; bfd_size_type reloc_size; outsec = bfd_get_section_by_name (outbfd, bfd_section_name (inbfd, insec)); assert (outsec != NULL); size = bfd_get_section_size_before_reloc (insec); if (size == 0) return; /* FIXME: Why are these necessary? */ insec->_cooked_size = insec->_raw_size; insec->reloc_done = true; if ((bfd_get_section_flags (inbfd, insec) & SEC_HAS_CONTENTS) == 0) contents = NULL; else { contents = xmalloc (size); if (! bfd_get_section_contents (inbfd, insec, contents, (file_ptr) 0, size)) bfd_fatal (bfd_get_filename (inbfd)); } reloc_size = bfd_get_reloc_upper_bound (inbfd, insec); if (reloc_size == 0) bfd_set_reloc (outbfd, outsec, (arelent **) NULL, 0); else { arelent **relocs; bfd_size_type reloc_count; relocs = (arelent **) xmalloc (reloc_size); reloc_count = bfd_canonicalize_reloc (inbfd, insec, relocs, symbols); mangle_relocs (outbfd, insec, relocs, &reloc_count, (char *) contents, size); bfd_set_reloc (outbfd, outsec, relocs, reloc_count); } if (contents != NULL) { if (! bfd_set_section_contents (outbfd, outsec, contents, (file_ptr) 0, size)) bfd_fatal (bfd_get_filename (outbfd)); free (contents); } } /* Some, perhaps all, NetWare targets require changing the relocs used by the input formats. */ static void mangle_relocs (outbfd, insec, relocs, reloc_count_ptr, contents, contents_size) bfd *outbfd; asection *insec; arelent **relocs; bfd_size_type *reloc_count_ptr; char *contents; bfd_size_type contents_size; { switch (bfd_get_arch (outbfd)) { case bfd_arch_i386: i386_mangle_relocs (outbfd, insec, relocs, reloc_count_ptr, contents, contents_size); break; default: break; } } /* NetWare on the i386 supports a restricted set of relocs, which are different from those used on other i386 targets. This routine converts the relocs. It is, obviously, very target dependent. At the moment, the nlm32-i386 backend performs similar translations; however, it is more reliable and efficient to do them here. */ static reloc_howto_type nlm_i386_pcrel_howto = HOWTO (1, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "DISP32", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true); /* pcrel_offset */ static void i386_mangle_relocs (outbfd, insec, relocs, reloc_count_ptr, contents, contents_size) bfd *outbfd; asection *insec; arelent **relocs; bfd_size_type *reloc_count_ptr; char *contents; bfd_size_type contents_size; { bfd_size_type reloc_count, i; reloc_count = *reloc_count_ptr; for (i = 0; i < reloc_count; i++) { arelent *rel; asymbol *sym; bfd_vma addend; rel = *relocs++; sym = *rel->sym_ptr_ptr; /* Note that no serious harm will ensue if we fail to change a reloc. The backend will fail when writing out the reloc. */ /* Make sure this reloc is within the data we have. We use only 4 byte relocs here, so we insist on having 4 bytes. */ if (rel->address + 4 > contents_size) continue; /* A PC relative reloc entirely within a single section is completely unnecessary. This can be generated by ld -r. */ if (sym == insec->symbol && rel->howto != NULL && rel->howto->pc_relative && ! rel->howto->pcrel_offset) { --*reloc_count_ptr; --relocs; memmove (relocs, relocs + 1, (reloc_count - i) * sizeof (arelent *)); continue; } /* NetWare doesn't support reloc addends, so we get rid of them here by simply adding them into the object data. We handle the symbol value, if any, the same way. */ addend = rel->addend; if (! bfd_is_com_section (bfd_get_section (sym))) addend += sym->value; if (addend != 0 && rel->howto != NULL && rel->howto->rightshift == 0 && rel->howto->size == 2 && rel->howto->bitsize == 32 && rel->howto->bitpos == 0 && rel->howto->src_mask == 0xffffffff && rel->howto->dst_mask == 0xffffffff) { bfd_vma val; val = bfd_get_32 (outbfd, contents + rel->address); val += addend; bfd_put_32 (outbfd, val, contents + rel->address); /* Adjust the reloc for the changes we just made. */ rel->addend = 0; if (! bfd_is_com_section (bfd_get_section (sym)) && sym->value != 0) rel->sym_ptr_ptr = bfd_get_section (sym)->symbol_ptr_ptr; } /* NetWare uses a reloc with pcrel_offset set. We adjust pc_relative relocs accordingly. We are going to change the howto field, so we can only do this if the current one is compatible. We should check that special_function is NULL here, but at the moment coff-i386 uses a special_function which does not affect what we are doing here. */ if (rel->howto != NULL && rel->howto->pc_relative && ! rel->howto->pcrel_offset && rel->howto->rightshift == 0 && rel->howto->size == 2 && rel->howto->bitsize == 32 && rel->howto->bitpos == 0 && rel->howto->src_mask == 0xffffffff && rel->howto->dst_mask == 0xffffffff) { bfd_vma val; /* When pcrel_offset is not set, it means that the negative of the address of the memory location is stored in the memory location. We must add it back in. */ val = bfd_get_32 (outbfd, contents + rel->address); val += rel->address; bfd_put_32 (outbfd, val, contents + rel->address); /* We must change to a new howto. */ rel->howto = &nlm_i386_pcrel_howto; } } }