| /* NLM (NetWare Loadable Module) executable support for BFD. |
| Copyright (C) 1993, 94, 95, 1998 Free Software Foundation, Inc. |
| |
| Written by Fred Fish @ Cygnus Support, using ELF support as the |
| template. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| #include "libnlm.h" |
| |
| /* The functions in this file do not use the names they appear to use. |
| This file is actually compiled multiple times, once for each size |
| of NLM target we are using. At each size we use a different name, |
| constructed by the macro nlmNAME. For example, the function which |
| is named nlm_symbol_type below is actually named nlm32_symbol_type |
| in the final executable. */ |
| |
| #define Nlm_External_Fixed_Header NlmNAME(External_Fixed_Header) |
| #define Nlm_External_Version_Header NlmNAME(External_Version_Header) |
| #define Nlm_External_Copyright_Header NlmNAME(External_Copyright_Header) |
| #define Nlm_External_Extended_Header NlmNAME(External_Extended_Header) |
| #define Nlm_External_Custom_Header NlmNAME(External_Custom_Header) |
| #define Nlm_External_Cygnus_Ext_Header NlmNAME(External_Cygnus_Ext_Header) |
| |
| #define nlm_symbol_type nlmNAME(symbol_type) |
| #define nlm_get_symtab_upper_bound nlmNAME(get_symtab_upper_bound) |
| #define nlm_get_symtab nlmNAME(get_symtab) |
| #define nlm_make_empty_symbol nlmNAME(make_empty_symbol) |
| #define nlm_print_symbol nlmNAME(print_symbol) |
| #define nlm_get_symbol_info nlmNAME(get_symbol_info) |
| #define nlm_get_reloc_upper_bound nlmNAME(get_reloc_upper_bound) |
| #define nlm_canonicalize_reloc nlmNAME(canonicalize_reloc) |
| #define nlm_object_p nlmNAME(object_p) |
| #define nlm_set_section_contents nlmNAME(set_section_contents) |
| #define nlm_write_object_contents nlmNAME(write_object_contents) |
| |
| #define nlm_swap_fixed_header_in(abfd,src,dst) \ |
| (nlm_swap_fixed_header_in_func(abfd))(abfd,src,dst) |
| #define nlm_swap_fixed_header_out(abfd,src,dst) \ |
| (nlm_swap_fixed_header_out_func(abfd))(abfd,src,dst) |
| |
| /* Forward declarations of static functions */ |
| |
| static boolean add_bfd_section |
| PARAMS ((bfd *, char *, file_ptr, bfd_size_type, flagword)); |
| static boolean nlm_swap_variable_header_in |
| PARAMS ((bfd *)); |
| static boolean nlm_swap_variable_header_out |
| PARAMS ((bfd *)); |
| static boolean find_nonzero |
| PARAMS ((PTR, size_t)); |
| static boolean nlm_swap_auxiliary_headers_in |
| PARAMS ((bfd *)); |
| static boolean nlm_swap_auxiliary_headers_out |
| PARAMS ((bfd *)); |
| static boolean nlm_slurp_symbol_table |
| PARAMS ((bfd *)); |
| static boolean nlm_slurp_reloc_fixups |
| PARAMS ((bfd *)); |
| static boolean nlm_compute_section_file_positions |
| PARAMS ((bfd *)); |
| static int nlm_external_reloc_compare |
| PARAMS ((const void *, const void *)); |
| |
| /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
| can be handled by explicitly specifying 32 bits or "the long type". */ |
| #if ARCH_SIZE == 64 |
| #define put_word bfd_h_put_64 |
| #define get_word bfd_h_get_64 |
| #endif |
| #if ARCH_SIZE == 32 |
| #define put_word bfd_h_put_32 |
| #define get_word bfd_h_get_32 |
| #endif |
| |
| const bfd_target * |
| nlm_object_p (abfd) |
| bfd *abfd; |
| { |
| struct nlm_obj_tdata *preserved_tdata = nlm_tdata (abfd); |
| boolean (*backend_object_p) PARAMS ((bfd *)); |
| PTR x_fxdhdr = NULL; |
| Nlm_Internal_Fixed_Header *i_fxdhdrp; |
| struct nlm_obj_tdata *new_tdata = NULL; |
| const char *signature; |
| enum bfd_architecture arch; |
| |
| /* Some NLM formats have a prefix before the standard NLM fixed |
| header. */ |
| backend_object_p = nlm_backend_object_p_func (abfd); |
| if (backend_object_p) |
| { |
| if (!(*backend_object_p) (abfd)) |
| goto got_wrong_format_error; |
| } |
| |
| /* Read in the fixed length portion of the NLM header in external format. */ |
| |
| x_fxdhdr = (PTR) bfd_malloc ((size_t) nlm_fixed_header_size (abfd)); |
| if (x_fxdhdr == NULL) |
| goto got_no_match; |
| |
| if (bfd_read ((PTR) x_fxdhdr, nlm_fixed_header_size (abfd), 1, abfd) != |
| nlm_fixed_header_size (abfd)) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| goto got_wrong_format_error; |
| else |
| goto got_no_match; |
| } |
| |
| /* Allocate an instance of the nlm_obj_tdata structure and hook it up to |
| the tdata pointer in the bfd. */ |
| |
| new_tdata = ((struct nlm_obj_tdata *) |
| bfd_zalloc (abfd, sizeof (struct nlm_obj_tdata))); |
| if (new_tdata == NULL) |
| goto got_no_match; |
| |
| nlm_tdata (abfd) = new_tdata; |
| |
| i_fxdhdrp = nlm_fixed_header (abfd); |
| nlm_swap_fixed_header_in (abfd, x_fxdhdr, i_fxdhdrp); |
| free (x_fxdhdr); |
| x_fxdhdr = NULL; |
| |
| /* Check to see if we have an NLM file for this backend by matching |
| the NLM signature. */ |
| |
| signature = nlm_signature (abfd); |
| if (signature != NULL |
| && *signature != '\0' |
| && strncmp ((char *) i_fxdhdrp->signature, signature, |
| NLM_SIGNATURE_SIZE) != 0) |
| goto got_wrong_format_error; |
| |
| /* There's no supported way to discover the endianess of an NLM, so test for |
| a sane version number after doing byte swapping appropriate for this |
| XVEC. (Hack alert!) */ |
| |
| if (i_fxdhdrp->version > 0xFFFF) |
| goto got_wrong_format_error; |
| |
| /* There's no supported way to check for 32 bit versus 64 bit addresses, |
| so ignore this distinction for now. (FIXME) */ |
| |
| /* Swap in the rest of the required header. */ |
| if (!nlm_swap_variable_header_in (abfd)) |
| { |
| if (bfd_get_error () != bfd_error_system_call) |
| goto got_wrong_format_error; |
| else |
| goto got_no_match; |
| } |
| |
| /* Add the sections supplied by all NLM's, and then read in the |
| auxiliary headers. Reading the auxiliary headers may create |
| additional sections described in the cygnus_ext header. |
| From this point on we assume that we have an NLM, and do not |
| treat errors as indicating the wrong format. */ |
| |
| if (!add_bfd_section (abfd, NLM_CODE_NAME, |
| i_fxdhdrp->codeImageOffset, |
| i_fxdhdrp->codeImageSize, |
| (SEC_CODE | SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_RELOC)) |
| || !add_bfd_section (abfd, NLM_INITIALIZED_DATA_NAME, |
| i_fxdhdrp->dataImageOffset, |
| i_fxdhdrp->dataImageSize, |
| (SEC_DATA | SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_RELOC)) |
| || !add_bfd_section (abfd, NLM_UNINITIALIZED_DATA_NAME, |
| (file_ptr) 0, |
| i_fxdhdrp->uninitializedDataSize, |
| SEC_ALLOC)) |
| goto got_no_match; |
| |
| if (!nlm_swap_auxiliary_headers_in (abfd)) |
| goto got_no_match; |
| |
| if (nlm_fixed_header (abfd)->numberOfRelocationFixups != 0 |
| || nlm_fixed_header (abfd)->numberOfExternalReferences != 0) |
| abfd->flags |= HAS_RELOC; |
| if (nlm_fixed_header (abfd)->numberOfPublics != 0 |
| || nlm_fixed_header (abfd)->numberOfDebugRecords != 0 |
| || nlm_fixed_header (abfd)->numberOfExternalReferences != 0) |
| abfd->flags |= HAS_SYMS; |
| |
| arch = nlm_architecture (abfd); |
| if (arch != bfd_arch_unknown) |
| bfd_default_set_arch_mach (abfd, arch, (unsigned long) 0); |
| |
| abfd->flags |= EXEC_P; |
| bfd_get_start_address (abfd) = nlm_fixed_header (abfd)->codeStartOffset; |
| |
| return (abfd->xvec); |
| |
| got_wrong_format_error: |
| bfd_set_error (bfd_error_wrong_format); |
| got_no_match: |
| nlm_tdata (abfd) = preserved_tdata; |
| if (new_tdata != NULL) |
| bfd_release (abfd, new_tdata); |
| if (x_fxdhdr != NULL) |
| free (x_fxdhdr); |
| return (NULL); |
| } |
| |
| /* Add a section to the bfd. */ |
| |
| static boolean |
| add_bfd_section (abfd, name, offset, size, flags) |
| bfd *abfd; |
| char *name; |
| file_ptr offset; |
| bfd_size_type size; |
| flagword flags; |
| { |
| asection *newsect; |
| |
| newsect = bfd_make_section (abfd, name); |
| if (newsect == NULL) |
| { |
| return (false); |
| } |
| newsect->vma = 0; /* NLM's are relocatable. */ |
| newsect->_raw_size = size; |
| newsect->filepos = offset; |
| newsect->flags = flags; |
| newsect->alignment_power = bfd_log2 (0); /* FIXME */ |
| return (true); |
| } |
| |
| /* Read and swap in the variable length header. All the fields must |
| exist in the NLM, and must exist in the order they are read here. */ |
| |
| static boolean |
| nlm_swap_variable_header_in (abfd) |
| bfd *abfd; |
| { |
| unsigned char temp[NLM_TARGET_LONG_SIZE]; |
| |
| /* Read the description length and text members. */ |
| |
| if (bfd_read ((PTR) & nlm_variable_header (abfd)->descriptionLength, |
| sizeof (nlm_variable_header (abfd)->descriptionLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->descriptionLength)) |
| return (false); |
| if (bfd_read ((PTR) nlm_variable_header (abfd)->descriptionText, |
| nlm_variable_header (abfd)->descriptionLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->descriptionLength + 1) |
| return (false); |
| |
| /* Read and convert the stackSize field. */ |
| |
| if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| return (false); |
| nlm_variable_header (abfd)->stackSize = get_word (abfd, (bfd_byte *) temp); |
| |
| /* Read and convert the reserved field. */ |
| |
| if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| return (false); |
| nlm_variable_header (abfd)->reserved = get_word (abfd, (bfd_byte *) temp); |
| |
| /* Read the oldThreadName field. This field is a fixed length string. */ |
| |
| if (bfd_read ((PTR) nlm_variable_header (abfd)->oldThreadName, |
| sizeof (nlm_variable_header (abfd)->oldThreadName), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->oldThreadName)) |
| return (false); |
| |
| /* Read the screen name length and text members. */ |
| |
| if (bfd_read ((PTR) & nlm_variable_header (abfd)->screenNameLength, |
| sizeof (nlm_variable_header (abfd)->screenNameLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->screenNameLength)) |
| return (false); |
| if (bfd_read ((PTR) nlm_variable_header (abfd)->screenName, |
| nlm_variable_header (abfd)->screenNameLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->screenNameLength + 1) |
| return (false); |
| |
| /* Read the thread name length and text members. */ |
| |
| if (bfd_read ((PTR) & nlm_variable_header (abfd)->threadNameLength, |
| sizeof (nlm_variable_header (abfd)->threadNameLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->threadNameLength)) |
| return (false); |
| if (bfd_read ((PTR) nlm_variable_header (abfd)->threadName, |
| nlm_variable_header (abfd)->threadNameLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->threadNameLength + 1) |
| return (false); |
| return (true); |
| } |
| |
| /* Swap and write out the variable length header. All the fields must |
| exist in the NLM, and must exist in this order. */ |
| |
| static boolean |
| nlm_swap_variable_header_out (abfd) |
| bfd *abfd; |
| { |
| unsigned char temp[NLM_TARGET_LONG_SIZE]; |
| |
| /* Write the description length and text members. */ |
| |
| if (bfd_write ((PTR) & nlm_variable_header (abfd)->descriptionLength, |
| sizeof (nlm_variable_header (abfd)->descriptionLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->descriptionLength)) |
| return (false); |
| if (bfd_write ((PTR) nlm_variable_header (abfd)->descriptionText, |
| nlm_variable_header (abfd)->descriptionLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->descriptionLength + 1) |
| return (false); |
| |
| /* Convert and write the stackSize field. */ |
| |
| put_word (abfd, (bfd_vma) nlm_variable_header (abfd)->stackSize, |
| (bfd_byte *) temp); |
| if (bfd_write ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| return (false); |
| |
| /* Convert and write the reserved field. */ |
| |
| put_word (abfd, (bfd_vma) nlm_variable_header (abfd)->reserved, |
| (bfd_byte *) temp); |
| if (bfd_write ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| return (false); |
| |
| /* Write the oldThreadName field. This field is a fixed length string. */ |
| |
| if (bfd_write ((PTR) nlm_variable_header (abfd)->oldThreadName, |
| sizeof (nlm_variable_header (abfd)->oldThreadName), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->oldThreadName)) |
| return (false); |
| |
| /* Write the screen name length and text members. */ |
| |
| if (bfd_write ((PTR) & nlm_variable_header (abfd)->screenNameLength, |
| sizeof (nlm_variable_header (abfd)->screenNameLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->screenNameLength)) |
| return (false); |
| if (bfd_write ((PTR) nlm_variable_header (abfd)->screenName, |
| nlm_variable_header (abfd)->screenNameLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->screenNameLength + 1) |
| return (false); |
| |
| /* Write the thread name length and text members. */ |
| |
| if (bfd_write ((PTR) & nlm_variable_header (abfd)->threadNameLength, |
| sizeof (nlm_variable_header (abfd)->threadNameLength), |
| 1, abfd) != |
| sizeof (nlm_variable_header (abfd)->threadNameLength)) |
| return (false); |
| if (bfd_write ((PTR) nlm_variable_header (abfd)->threadName, |
| nlm_variable_header (abfd)->threadNameLength + 1, |
| 1, abfd) != |
| (bfd_size_type) nlm_variable_header (abfd)->threadNameLength + 1) |
| return (false); |
| return (true); |
| } |
| |
| /* Read and swap in the contents of all the auxiliary headers. Because of |
| the braindead design, we have to do strcmps on strings of indeterminate |
| length to figure out what each auxiliary header is. Even worse, we have |
| no way of knowing how many auxiliary headers there are or where the end |
| of the auxiliary headers are, except by finding something that doesn't |
| look like a known auxiliary header. This means that the first new type |
| of auxiliary header added will break all existing tools that don't |
| recognize it. */ |
| |
| static boolean |
| nlm_swap_auxiliary_headers_in (abfd) |
| bfd *abfd; |
| { |
| char tempstr[16]; |
| long position; |
| |
| for (;;) |
| { |
| position = bfd_tell (abfd); |
| if (bfd_read ((PTR) tempstr, sizeof (tempstr), 1, abfd) != |
| sizeof (tempstr)) |
| return (false); |
| if (bfd_seek (abfd, position, SEEK_SET) == -1) |
| return (false); |
| if (strncmp (tempstr, "VeRsIoN#", 8) == 0) |
| { |
| Nlm_External_Version_Header thdr; |
| if (bfd_read ((PTR) & thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return (false); |
| memcpy (nlm_version_header (abfd)->stamp, thdr.stamp, |
| sizeof (thdr.stamp)); |
| nlm_version_header (abfd)->majorVersion = |
| get_word (abfd, (bfd_byte *) thdr.majorVersion); |
| nlm_version_header (abfd)->minorVersion = |
| get_word (abfd, (bfd_byte *) thdr.minorVersion); |
| nlm_version_header (abfd)->revision = |
| get_word (abfd, (bfd_byte *) thdr.revision); |
| nlm_version_header (abfd)->year = |
| get_word (abfd, (bfd_byte *) thdr.year); |
| nlm_version_header (abfd)->month = |
| get_word (abfd, (bfd_byte *) thdr.month); |
| nlm_version_header (abfd)->day = |
| get_word (abfd, (bfd_byte *) thdr.day); |
| } |
| else if (strncmp (tempstr, "MeSsAgEs", 8) == 0) |
| { |
| Nlm_External_Extended_Header thdr; |
| if (bfd_read ((PTR) & thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return (false); |
| memcpy (nlm_extended_header (abfd)->stamp, thdr.stamp, |
| sizeof (thdr.stamp)); |
| nlm_extended_header (abfd)->languageID = |
| get_word (abfd, (bfd_byte *) thdr.languageID); |
| nlm_extended_header (abfd)->messageFileOffset = |
| get_word (abfd, (bfd_byte *) thdr.messageFileOffset); |
| nlm_extended_header (abfd)->messageFileLength = |
| get_word (abfd, (bfd_byte *) thdr.messageFileLength); |
| nlm_extended_header (abfd)->messageCount = |
| get_word (abfd, (bfd_byte *) thdr.messageCount); |
| nlm_extended_header (abfd)->helpFileOffset = |
| get_word (abfd, (bfd_byte *) thdr.helpFileOffset); |
| nlm_extended_header (abfd)->helpFileLength = |
| get_word (abfd, (bfd_byte *) thdr.helpFileLength); |
| nlm_extended_header (abfd)->RPCDataOffset = |
| get_word (abfd, (bfd_byte *) thdr.RPCDataOffset); |
| nlm_extended_header (abfd)->RPCDataLength = |
| get_word (abfd, (bfd_byte *) thdr.RPCDataLength); |
| nlm_extended_header (abfd)->sharedCodeOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedCodeOffset); |
| nlm_extended_header (abfd)->sharedCodeLength = |
| get_word (abfd, (bfd_byte *) thdr.sharedCodeLength); |
| nlm_extended_header (abfd)->sharedDataOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedDataOffset); |
| nlm_extended_header (abfd)->sharedDataLength = |
| get_word (abfd, (bfd_byte *) thdr.sharedDataLength); |
| nlm_extended_header (abfd)->sharedRelocationFixupOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedRelocationFixupOffset); |
| nlm_extended_header (abfd)->sharedRelocationFixupCount = |
| get_word (abfd, (bfd_byte *) thdr.sharedRelocationFixupCount); |
| nlm_extended_header (abfd)->sharedExternalReferenceOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedExternalReferenceOffset); |
| nlm_extended_header (abfd)->sharedExternalReferenceCount = |
| get_word (abfd, (bfd_byte *) thdr.sharedExternalReferenceCount); |
| nlm_extended_header (abfd)->sharedPublicsOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedPublicsOffset); |
| nlm_extended_header (abfd)->sharedPublicsCount = |
| get_word (abfd, (bfd_byte *) thdr.sharedPublicsCount); |
| nlm_extended_header (abfd)->sharedDebugRecordOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedDebugRecordOffset); |
| nlm_extended_header (abfd)->sharedDebugRecordCount = |
| get_word (abfd, (bfd_byte *) thdr.sharedDebugRecordCount); |
| nlm_extended_header (abfd)->SharedInitializationOffset = |
| get_word (abfd, (bfd_byte *) thdr.sharedInitializationOffset); |
| nlm_extended_header (abfd)->SharedExitProcedureOffset = |
| get_word (abfd, (bfd_byte *) thdr.SharedExitProcedureOffset); |
| nlm_extended_header (abfd)->productID = |
| get_word (abfd, (bfd_byte *) thdr.productID); |
| nlm_extended_header (abfd)->reserved0 = |
| get_word (abfd, (bfd_byte *) thdr.reserved0); |
| nlm_extended_header (abfd)->reserved1 = |
| get_word (abfd, (bfd_byte *) thdr.reserved1); |
| nlm_extended_header (abfd)->reserved2 = |
| get_word (abfd, (bfd_byte *) thdr.reserved2); |
| nlm_extended_header (abfd)->reserved3 = |
| get_word (abfd, (bfd_byte *) thdr.reserved3); |
| nlm_extended_header (abfd)->reserved4 = |
| get_word (abfd, (bfd_byte *) thdr.reserved4); |
| nlm_extended_header (abfd)->reserved5 = |
| get_word (abfd, (bfd_byte *) thdr.reserved5); |
| } |
| else if (strncmp (tempstr, "CoPyRiGhT=", 10) == 0) |
| { |
| if (bfd_read ((PTR) nlm_copyright_header (abfd)->stamp, |
| sizeof (nlm_copyright_header (abfd)->stamp), |
| 1, abfd) |
| != sizeof (nlm_copyright_header (abfd)->stamp)) |
| return (false); |
| if (bfd_read ((PTR) & (nlm_copyright_header (abfd) |
| ->copyrightMessageLength), |
| 1, 1, abfd) != 1) |
| return (false); |
| /* The copyright message is a variable length string. */ |
| if (bfd_read ((PTR) nlm_copyright_header (abfd)->copyrightMessage, |
| nlm_copyright_header (abfd)->copyrightMessageLength + 1, |
| 1, abfd) != |
| ((bfd_size_type) |
| nlm_copyright_header (abfd)->copyrightMessageLength + 1)) |
| return (false); |
| } |
| else if (strncmp (tempstr, "CuStHeAd", 8) == 0) |
| { |
| Nlm_External_Custom_Header thdr; |
| bfd_size_type hdrLength; |
| file_ptr dataOffset; |
| bfd_size_type dataLength; |
| char dataStamp[8]; |
| PTR hdr; |
| |
| /* Read the stamp ("CuStHeAd"). */ |
| if (bfd_read ((PTR) thdr.stamp, 1, sizeof (thdr.stamp), abfd) |
| != sizeof (thdr.stamp)) |
| return false; |
| /* Read the length of this custom header. */ |
| if (bfd_read ((PTR) thdr.length, 1, sizeof (thdr.length), abfd) |
| != sizeof (thdr.length)) |
| return false; |
| hdrLength = get_word (abfd, (bfd_byte *) thdr.length); |
| /* Read further fields if we have them. */ |
| if (hdrLength < NLM_TARGET_LONG_SIZE) |
| dataOffset = 0; |
| else |
| { |
| if (bfd_read ((PTR) thdr.dataOffset, 1, |
| sizeof (thdr.dataOffset), abfd) |
| != sizeof (thdr.dataOffset)) |
| return false; |
| dataOffset = get_word (abfd, (bfd_byte *) thdr.dataOffset); |
| } |
| if (hdrLength < 2 * NLM_TARGET_LONG_SIZE) |
| dataLength = 0; |
| else |
| { |
| if (bfd_read ((PTR) thdr.dataLength, 1, |
| sizeof (thdr.dataLength), abfd) |
| != sizeof (thdr.dataLength)) |
| return false; |
| dataLength = get_word (abfd, (bfd_byte *) thdr.dataLength); |
| } |
| if (hdrLength < 2 * NLM_TARGET_LONG_SIZE + 8) |
| memset (dataStamp, 0, sizeof (dataStamp)); |
| else |
| { |
| if (bfd_read ((PTR) dataStamp, 1, sizeof (dataStamp), abfd) |
| != sizeof (dataStamp)) |
| return false; |
| } |
| |
| /* Read the rest of the header, if any. */ |
| if (hdrLength <= 2 * NLM_TARGET_LONG_SIZE + 8) |
| { |
| hdr = NULL; |
| hdrLength = 0; |
| } |
| else |
| { |
| hdrLength -= 2 * NLM_TARGET_LONG_SIZE + 8; |
| hdr = bfd_alloc (abfd, hdrLength); |
| if (hdr == NULL) |
| return false; |
| if (bfd_read (hdr, 1, hdrLength, abfd) != hdrLength) |
| return false; |
| } |
| |
| /* If we have found a Cygnus header, process it. Otherwise, |
| just save the associated data without trying to interpret |
| it. */ |
| if (strncmp (dataStamp, "CyGnUsEx", 8) == 0) |
| { |
| file_ptr pos; |
| bfd_byte *contents; |
| bfd_byte *p, *pend; |
| |
| BFD_ASSERT (hdrLength == 0 && hdr == NULL); |
| |
| pos = bfd_tell (abfd); |
| if (bfd_seek (abfd, dataOffset, SEEK_SET) != 0) |
| return false; |
| contents = (bfd_byte *) bfd_alloc (abfd, dataLength); |
| if (contents == NULL) |
| return false; |
| if (bfd_read (contents, 1, dataLength, abfd) != dataLength) |
| return false; |
| if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
| return false; |
| |
| memcpy (nlm_cygnus_ext_header (abfd), "CyGnUsEx", 8); |
| nlm_cygnus_ext_header (abfd)->offset = dataOffset; |
| nlm_cygnus_ext_header (abfd)->length = dataLength; |
| |
| /* This data this header points to provides a list of |
| the sections which were in the original object file |
| which was converted to become an NLM. We locate |
| those sections and add them to the BFD. Note that |
| this is likely to create a second .text, .data and |
| .bss section; retrieving the sections by name will |
| get the actual NLM sections, which is what we want to |
| happen. The sections from the original file, which |
| may be subsets of the NLM section, can only be found |
| using bfd_map_over_sections. */ |
| p = contents; |
| pend = p + dataLength; |
| while (p < pend) |
| { |
| char *name; |
| size_t l; |
| file_ptr filepos; |
| bfd_size_type size; |
| asection *newsec; |
| |
| /* The format of this information is |
| null terminated section name |
| zeroes to adjust to 4 byte boundary |
| 4 byte section data file pointer |
| 4 byte section size |
| */ |
| |
| name = (char *) p; |
| l = strlen (name) + 1; |
| l = (l + 3) &~ 3; |
| p += l; |
| filepos = bfd_h_get_32 (abfd, p); |
| p += 4; |
| size = bfd_h_get_32 (abfd, p); |
| p += 4; |
| |
| newsec = bfd_make_section_anyway (abfd, name); |
| if (newsec == (asection *) NULL) |
| return false; |
| newsec->_raw_size = size; |
| if (filepos != 0) |
| { |
| newsec->filepos = filepos; |
| newsec->flags |= SEC_HAS_CONTENTS; |
| } |
| } |
| } |
| else |
| { |
| memcpy (nlm_custom_header (abfd)->stamp, thdr.stamp, |
| sizeof (thdr.stamp)); |
| nlm_custom_header (abfd)->hdrLength = hdrLength; |
| nlm_custom_header (abfd)->dataOffset = dataOffset; |
| nlm_custom_header (abfd)->dataLength = dataLength; |
| memcpy (nlm_custom_header (abfd)->dataStamp, dataStamp, |
| sizeof (dataStamp)); |
| nlm_custom_header (abfd)->hdr = hdr; |
| } |
| } |
| else |
| { |
| break; |
| } |
| } |
| return (true); |
| } |
| |
| /* Return whether there is a non-zero byte in a memory block. */ |
| |
| static boolean |
| find_nonzero (buf, size) |
| PTR buf; |
| size_t size; |
| { |
| char *p = (char *) buf; |
| |
| while (size-- != 0) |
| if (*p++ != 0) |
| return true; |
| return false; |
| } |
| |
| /* Swap out the contents of the auxiliary headers. We create those |
| auxiliary headers which have been set non-zero. We do not require |
| the caller to set up the stamp fields. */ |
| |
| static boolean |
| nlm_swap_auxiliary_headers_out (abfd) |
| bfd *abfd; |
| { |
| /* Write out the version header if there is one. */ |
| if (find_nonzero ((PTR) nlm_version_header (abfd), |
| sizeof (Nlm_Internal_Version_Header))) |
| { |
| Nlm_External_Version_Header thdr; |
| |
| memcpy (thdr.stamp, "VeRsIoN#", 8); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->majorVersion, |
| (bfd_byte *) thdr.majorVersion); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->minorVersion, |
| (bfd_byte *) thdr.minorVersion); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->revision, |
| (bfd_byte *) thdr.revision); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->year, |
| (bfd_byte *) thdr.year); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->month, |
| (bfd_byte *) thdr.month); |
| put_word (abfd, (bfd_vma) nlm_version_header (abfd)->day, |
| (bfd_byte *) thdr.day); |
| if (bfd_write ((PTR) & thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return false; |
| } |
| |
| /* Write out the extended header if there is one. */ |
| if (find_nonzero ((PTR) nlm_extended_header (abfd), |
| sizeof (Nlm_Internal_Extended_Header))) |
| { |
| Nlm_External_Extended_Header thdr; |
| |
| memcpy (thdr.stamp, "MeSsAgEs", 8); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->languageID, |
| (bfd_byte *) thdr.languageID); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->messageFileOffset, |
| (bfd_byte *) thdr.messageFileOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->messageFileLength, |
| (bfd_byte *) thdr.messageFileLength); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->messageCount, |
| (bfd_byte *) thdr.messageCount); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->helpFileOffset, |
| (bfd_byte *) thdr.helpFileOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->helpFileLength, |
| (bfd_byte *) thdr.helpFileLength); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->RPCDataOffset, |
| (bfd_byte *) thdr.RPCDataOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->RPCDataLength, |
| (bfd_byte *) thdr.RPCDataLength); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedCodeOffset, |
| (bfd_byte *) thdr.sharedCodeOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedCodeLength, |
| (bfd_byte *) thdr.sharedCodeLength); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedDataOffset, |
| (bfd_byte *) thdr.sharedDataOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedDataLength, |
| (bfd_byte *) thdr.sharedDataLength); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedRelocationFixupOffset, |
| (bfd_byte *) thdr.sharedRelocationFixupOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedRelocationFixupCount, |
| (bfd_byte *) thdr.sharedRelocationFixupCount); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedExternalReferenceOffset, |
| (bfd_byte *) thdr.sharedExternalReferenceOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedExternalReferenceCount, |
| (bfd_byte *) thdr.sharedExternalReferenceCount); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedPublicsOffset, |
| (bfd_byte *) thdr.sharedPublicsOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedPublicsCount, |
| (bfd_byte *) thdr.sharedPublicsCount); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedDebugRecordOffset, |
| (bfd_byte *) thdr.sharedDebugRecordOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->sharedDebugRecordCount, |
| (bfd_byte *) thdr.sharedDebugRecordCount); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->SharedInitializationOffset, |
| (bfd_byte *) thdr.sharedInitializationOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->SharedExitProcedureOffset, |
| (bfd_byte *) thdr.SharedExitProcedureOffset); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->productID, |
| (bfd_byte *) thdr.productID); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved0, |
| (bfd_byte *) thdr.reserved0); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved1, |
| (bfd_byte *) thdr.reserved1); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved2, |
| (bfd_byte *) thdr.reserved2); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved3, |
| (bfd_byte *) thdr.reserved3); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved4, |
| (bfd_byte *) thdr.reserved4); |
| put_word (abfd, |
| (bfd_vma) nlm_extended_header (abfd)->reserved5, |
| (bfd_byte *) thdr.reserved5); |
| if (bfd_write ((PTR) & thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return false; |
| } |
| |
| |
| /* Write out the copyright header if there is one. */ |
| if (find_nonzero ((PTR) nlm_copyright_header (abfd), |
| sizeof (Nlm_Internal_Copyright_Header))) |
| { |
| Nlm_External_Copyright_Header thdr; |
| |
| memcpy (thdr.stamp, "CoPyRiGhT=", 10); |
| if (bfd_write ((PTR) thdr.stamp, sizeof (thdr.stamp), 1, abfd) |
| != sizeof (thdr.stamp)) |
| return false; |
| thdr.copyrightMessageLength[0] = |
| nlm_copyright_header (abfd)->copyrightMessageLength; |
| if (bfd_write ((PTR) thdr.copyrightMessageLength, 1, 1, abfd) != 1) |
| return false; |
| /* The copyright message is a variable length string. */ |
| if (bfd_write ((PTR) nlm_copyright_header (abfd)->copyrightMessage, |
| nlm_copyright_header (abfd)->copyrightMessageLength + 1, |
| 1, abfd) != |
| ((bfd_size_type) |
| nlm_copyright_header (abfd)->copyrightMessageLength + 1)) |
| return false; |
| } |
| |
| /* Write out the custom header if there is one. */ |
| if (find_nonzero ((PTR) nlm_custom_header (abfd), |
| sizeof (Nlm_Internal_Custom_Header))) |
| { |
| Nlm_External_Custom_Header thdr; |
| boolean ds; |
| bfd_size_type hdrLength; |
| |
| ds = find_nonzero ((PTR) nlm_custom_header (abfd)->dataStamp, |
| sizeof (nlm_custom_header (abfd)->dataStamp)); |
| memcpy (thdr.stamp, "CuStHeAd", 8); |
| hdrLength = (2 * NLM_TARGET_LONG_SIZE + (ds ? 8 : 0) |
| + nlm_custom_header (abfd)->hdrLength); |
| put_word (abfd, hdrLength, thdr.length); |
| put_word (abfd, (bfd_vma) nlm_custom_header (abfd)->dataOffset, |
| thdr.dataOffset); |
| put_word (abfd, (bfd_vma) nlm_custom_header (abfd)->dataLength, |
| thdr.dataLength); |
| if (! ds) |
| { |
| BFD_ASSERT (nlm_custom_header (abfd)->hdrLength == 0); |
| if (bfd_write ((PTR) &thdr, 1, |
| sizeof (thdr) - sizeof (thdr.dataStamp), abfd) |
| != sizeof (thdr) - sizeof (thdr.dataStamp)) |
| return false; |
| } |
| else |
| { |
| memcpy (thdr.dataStamp, nlm_custom_header (abfd)->dataStamp, |
| sizeof (thdr.dataStamp)); |
| if (bfd_write ((PTR) &thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return false; |
| if (bfd_write (nlm_custom_header (abfd)->hdr, 1, |
| nlm_custom_header (abfd)->hdrLength, abfd) |
| != nlm_custom_header (abfd)->hdrLength) |
| return false; |
| } |
| } |
| |
| /* Write out the Cygnus debugging header if there is one. */ |
| if (find_nonzero ((PTR) nlm_cygnus_ext_header (abfd), |
| sizeof (Nlm_Internal_Cygnus_Ext_Header))) |
| { |
| Nlm_External_Custom_Header thdr; |
| |
| memcpy (thdr.stamp, "CuStHeAd", 8); |
| put_word (abfd, (bfd_vma) 2 * NLM_TARGET_LONG_SIZE + 8, |
| (bfd_byte *) thdr.length); |
| put_word (abfd, (bfd_vma) nlm_cygnus_ext_header (abfd)->offset, |
| (bfd_byte *) thdr.dataOffset); |
| put_word (abfd, (bfd_vma) nlm_cygnus_ext_header (abfd)->length, |
| (bfd_byte *) thdr.dataLength); |
| memcpy (thdr.dataStamp, "CyGnUsEx", 8); |
| if (bfd_write ((PTR) &thdr, sizeof (thdr), 1, abfd) != sizeof (thdr)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* We read the NLM's public symbols and use it to generate a bfd symbol |
| table (hey, it's better than nothing) on a one-for-one basis. Thus |
| use the number of public symbols as the number of bfd symbols we will |
| have once we actually get around to reading them in. |
| |
| Return the number of bytes required to hold the symtab vector, based on |
| the count plus 1, since we will NULL terminate the vector allocated based |
| on this size. */ |
| |
| long |
| nlm_get_symtab_upper_bound (abfd) |
| bfd *abfd; |
| { |
| Nlm_Internal_Fixed_Header *i_fxdhdrp; /* Nlm file header, internal form */ |
| long symcount; |
| long symtab_size = 0; |
| |
| i_fxdhdrp = nlm_fixed_header (abfd); |
| symcount = (i_fxdhdrp->numberOfPublics |
| + i_fxdhdrp->numberOfDebugRecords |
| + i_fxdhdrp->numberOfExternalReferences); |
| symtab_size = (symcount + 1) * (sizeof (asymbol)); |
| return (symtab_size); |
| } |
| |
| /* Note that bfd_get_symcount is guaranteed to be zero if slurping the |
| symbol table fails. */ |
| |
| long |
| nlm_get_symtab (abfd, alocation) |
| bfd *abfd; |
| asymbol **alocation; |
| { |
| nlm_symbol_type *symbase; |
| bfd_size_type counter = 0; |
| |
| if (nlm_slurp_symbol_table (abfd) == false) |
| return -1; |
| symbase = nlm_get_symbols (abfd); |
| while (counter < bfd_get_symcount (abfd)) |
| { |
| *alocation++ = &symbase->symbol; |
| symbase++; |
| counter++; |
| } |
| *alocation = (asymbol *) NULL; |
| return bfd_get_symcount (abfd); |
| } |
| |
| /* Make an NLM symbol. There is nothing special to do here. */ |
| |
| asymbol * |
| nlm_make_empty_symbol (abfd) |
| bfd *abfd; |
| { |
| nlm_symbol_type *new; |
| |
| new = (nlm_symbol_type *) bfd_zalloc (abfd, sizeof (nlm_symbol_type)); |
| if (new) |
| new->symbol.the_bfd = abfd; |
| return &new->symbol; |
| } |
| |
| /* Get symbol information. */ |
| |
| void |
| nlm_get_symbol_info (ignore_abfd, symbol, ret) |
| bfd *ignore_abfd; |
| asymbol *symbol; |
| symbol_info *ret; |
| { |
| bfd_symbol_info (symbol, ret); |
| } |
| |
| /* Print symbol information. */ |
| |
| void |
| nlm_print_symbol (abfd, afile, symbol, how) |
| bfd *abfd; |
| PTR afile; |
| asymbol *symbol; |
| bfd_print_symbol_type how; |
| { |
| FILE *file = (FILE *) afile; |
| |
| switch (how) |
| { |
| case bfd_print_symbol_name: |
| case bfd_print_symbol_more: |
| if (symbol->name) |
| fprintf (file, "%s", symbol->name); |
| break; |
| case bfd_print_symbol_all: |
| bfd_print_symbol_vandf ((PTR) file, symbol); |
| fprintf (file, " %-5s", symbol->section->name); |
| if (symbol->name) |
| fprintf (file, " %s", symbol->name); |
| break; |
| } |
| } |
| |
| /* Slurp in nlm symbol table. |
| |
| In the external (in-file) form, NLM export records are variable length, |
| with the following form: |
| |
| 1 byte length of the symbol name (N) |
| N bytes the symbol name |
| 4 bytes the symbol offset from start of it's section |
| |
| We also read in the debugging symbols and import records. Import |
| records are treated as undefined symbols. As we read the import |
| records we also read in the associated reloc information, which is |
| attached to the symbol. |
| |
| The bfd symbols are copied to SYMPTRS. |
| |
| When we return, the bfd symcount is either zero or contains the correct |
| number of symbols. |
| */ |
| |
| static boolean |
| nlm_slurp_symbol_table (abfd) |
| bfd *abfd; |
| { |
| Nlm_Internal_Fixed_Header *i_fxdhdrp; /* Nlm file header, internal form */ |
| bfd_size_type totsymcount; /* Number of NLM symbols */ |
| bfd_size_type symcount; /* Counter of NLM symbols */ |
| nlm_symbol_type *sym; /* Pointer to current bfd symbol */ |
| unsigned char symlength; /* Symbol length read into here */ |
| unsigned char symtype; /* Type of debugging symbol */ |
| bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* Symbol offsets read into here */ |
| boolean (*read_import_func) PARAMS ((bfd *, nlm_symbol_type *)); |
| boolean (*set_public_section_func) PARAMS ((bfd *, nlm_symbol_type *)); |
| |
| if (nlm_get_symbols (abfd) != NULL) |
| return (true); |
| |
| /* Read each raw NLM symbol, using the information to create a canonical bfd |
| symbol table entry. |
| |
| Note that we allocate the initial bfd canonical symbol buffer based on a |
| one-to-one mapping of the NLM symbols to canonical symbols. We actually |
| use all the NLM symbols, so there will be no space left over at the end. |
| When we have all the symbols, we build the caller's pointer vector. */ |
| |
| abfd->symcount = 0; |
| i_fxdhdrp = nlm_fixed_header (abfd); |
| totsymcount = (i_fxdhdrp->numberOfPublics |
| + i_fxdhdrp->numberOfDebugRecords |
| + i_fxdhdrp->numberOfExternalReferences); |
| if (totsymcount == 0) |
| { |
| return (true); |
| } |
| |
| if (bfd_seek (abfd, i_fxdhdrp->publicsOffset, SEEK_SET) == -1) |
| return (false); |
| |
| sym = ((nlm_symbol_type *) |
| bfd_zalloc (abfd, totsymcount * sizeof (nlm_symbol_type))); |
| if (!sym) |
| return false; |
| nlm_set_symbols (abfd, sym); |
| |
| /* We use the bfd's symcount directly as the control count, so that early |
| termination of the loop leaves the symcount correct for the symbols that |
| were read. */ |
| |
| set_public_section_func = nlm_set_public_section_func (abfd); |
| symcount = i_fxdhdrp->numberOfPublics; |
| while (abfd->symcount < symcount) |
| { |
| if (bfd_read ((PTR) & symlength, sizeof (symlength), 1, abfd) |
| != sizeof (symlength)) |
| return (false); |
| sym->symbol.the_bfd = abfd; |
| sym->symbol.name = bfd_alloc (abfd, symlength + 1); |
| if (!sym->symbol.name) |
| return false; |
| if (bfd_read ((PTR) sym->symbol.name, symlength, 1, abfd) |
| != symlength) |
| return (false); |
| /* Cast away const. */ |
| ((char *) (sym->symbol.name))[symlength] = '\0'; |
| if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| return (false); |
| sym->symbol.flags = BSF_GLOBAL | BSF_EXPORT; |
| sym->symbol.value = get_word (abfd, temp); |
| if (set_public_section_func) |
| { |
| /* Most backends can use the code below, but unfortunately |
| some use a different scheme. */ |
| if ((*set_public_section_func) (abfd, sym) == false) |
| return false; |
| } |
| else |
| { |
| if (sym->symbol.value & NLM_HIBIT) |
| { |
| sym->symbol.value &= ~NLM_HIBIT; |
| sym->symbol.flags |= BSF_FUNCTION; |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| } |
| else |
| { |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| } |
| } |
| sym->rcnt = 0; |
| abfd->symcount++; |
| sym++; |
| } |
| |
| /* Read the debugging records. */ |
| |
| if (i_fxdhdrp->numberOfDebugRecords > 0) |
| { |
| if (bfd_seek (abfd, i_fxdhdrp->debugInfoOffset, SEEK_SET) == -1) |
| return (false); |
| |
| symcount += i_fxdhdrp->numberOfDebugRecords; |
| while (abfd->symcount < symcount) |
| { |
| if ((bfd_read ((PTR) & symtype, sizeof (symtype), 1, abfd) |
| != sizeof (symtype)) |
| || bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp) |
| || (bfd_read ((PTR) & symlength, sizeof (symlength), 1, abfd) |
| != sizeof (symlength))) |
| return false; |
| sym->symbol.the_bfd = abfd; |
| sym->symbol.name = bfd_alloc (abfd, symlength + 1); |
| if (!sym->symbol.name) |
| return false; |
| if (bfd_read ((PTR) sym->symbol.name, symlength, 1, abfd) |
| != symlength) |
| return (false); |
| /* Cast away const. */ |
| ((char *) (sym->symbol.name))[symlength] = '\0'; |
| sym->symbol.flags = BSF_LOCAL; |
| sym->symbol.value = get_word (abfd, temp); |
| if (symtype == 0) |
| { |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| } |
| else if (symtype == 1) |
| { |
| sym->symbol.flags |= BSF_FUNCTION; |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| } |
| else |
| { |
| sym->symbol.section = bfd_abs_section_ptr; |
| } |
| sym->rcnt = 0; |
| abfd->symcount++; |
| sym++; |
| } |
| } |
| |
| /* Read in the import records. We can only do this if we know how |
| to read relocs for this target. */ |
| |
| read_import_func = nlm_read_import_func (abfd); |
| if (read_import_func != NULL) |
| { |
| if (bfd_seek (abfd, i_fxdhdrp->externalReferencesOffset, SEEK_SET) |
| == -1) |
| return (false); |
| |
| symcount += i_fxdhdrp->numberOfExternalReferences; |
| while (abfd->symcount < symcount) |
| { |
| if ((*read_import_func) (abfd, sym) == false) |
| return false; |
| sym++; |
| abfd->symcount++; |
| } |
| } |
| |
| return (true); |
| } |
| |
| /* Get the relocs for an NLM file. There are two types of relocs. |
| Imports are relocs against symbols defined in other NLM files. We |
| treat these as relocs against global symbols. Relocation fixups |
| are internal relocs. |
| |
| The actual format used to store the relocs is machine specific. */ |
| |
| /* Read in the relocation fixup information. This is stored in |
| nlm_relocation_fixups, an array of arelent structures, and |
| nlm_relocation_fixup_secs, an array of section pointers. The |
| section pointers are needed because the relocs are not sorted by |
| section. */ |
| |
| static boolean |
| nlm_slurp_reloc_fixups (abfd) |
| bfd *abfd; |
| { |
| boolean (*read_func) PARAMS ((bfd *, nlm_symbol_type *, asection **, |
| arelent *)); |
| bfd_size_type count; |
| arelent *rels; |
| asection **secs; |
| |
| if (nlm_relocation_fixups (abfd) != NULL) |
| return true; |
| read_func = nlm_read_reloc_func (abfd); |
| if (read_func == NULL) |
| return true; |
| |
| if (bfd_seek (abfd, nlm_fixed_header (abfd)->relocationFixupOffset, |
| SEEK_SET) != 0) |
| return false; |
| |
| count = nlm_fixed_header (abfd)->numberOfRelocationFixups; |
| rels = (arelent *) bfd_alloc (abfd, count * sizeof (arelent)); |
| secs = (asection **) bfd_alloc (abfd, count * sizeof (asection *)); |
| if ((rels == NULL || secs == NULL) && count != 0) |
| return false; |
| nlm_relocation_fixups (abfd) = rels; |
| nlm_relocation_fixup_secs (abfd) = secs; |
| |
| /* We have to read piece by piece, because we don't know how large |
| the machine specific reloc information is. */ |
| while (count-- != 0) |
| { |
| if ((*read_func) (abfd, (nlm_symbol_type *) NULL, secs, rels) == false) |
| { |
| nlm_relocation_fixups (abfd) = NULL; |
| nlm_relocation_fixup_secs (abfd) = NULL; |
| return false; |
| } |
| ++secs; |
| ++rels; |
| } |
| |
| return true; |
| } |
| |
| /* Get the number of relocs. This really just returns an upper bound, |
| since it does not attempt to distinguish them based on the section. |
| That will be handled when they are actually read. */ |
| |
| long |
| nlm_get_reloc_upper_bound (abfd, sec) |
| bfd *abfd; |
| asection *sec; |
| { |
| nlm_symbol_type *syms; |
| bfd_size_type count; |
| unsigned int ret; |
| |
| /* If we don't know how to read relocs, just return 0. */ |
| if (nlm_read_reloc_func (abfd) == NULL) |
| return -1; |
| /* Make sure we have either the code or the data section. */ |
| if ((bfd_get_section_flags (abfd, sec) & (SEC_CODE | SEC_DATA)) == 0) |
| return 0; |
| |
| syms = nlm_get_symbols (abfd); |
| if (syms == NULL) |
| { |
| if (nlm_slurp_symbol_table (abfd) == false) |
| return -1; |
| syms = nlm_get_symbols (abfd); |
| } |
| |
| ret = nlm_fixed_header (abfd)->numberOfRelocationFixups; |
| |
| count = bfd_get_symcount (abfd); |
| while (count-- != 0) |
| { |
| ret += syms->rcnt; |
| ++syms; |
| } |
| |
| return (ret + 1) * sizeof (arelent *); |
| } |
| |
| /* Get the relocs themselves. */ |
| |
| long |
| nlm_canonicalize_reloc (abfd, sec, relptr, symbols) |
| bfd *abfd; |
| asection *sec; |
| arelent **relptr; |
| asymbol **symbols; |
| { |
| arelent *rels; |
| asection **secs; |
| bfd_size_type count, i; |
| unsigned int ret; |
| |
| /* Get the relocation fixups. */ |
| rels = nlm_relocation_fixups (abfd); |
| if (rels == NULL) |
| { |
| if (nlm_slurp_reloc_fixups (abfd) == false) |
| return -1; |
| rels = nlm_relocation_fixups (abfd); |
| } |
| secs = nlm_relocation_fixup_secs (abfd); |
| |
| ret = 0; |
| count = nlm_fixed_header (abfd)->numberOfRelocationFixups; |
| for (i = 0; i < count; i++, rels++, secs++) |
| { |
| if (*secs == sec) |
| { |
| *relptr++ = rels; |
| ++ret; |
| } |
| } |
| |
| /* Get the import symbols. */ |
| count = bfd_get_symcount (abfd); |
| for (i = 0; i < count; i++, symbols++) |
| { |
| asymbol *sym; |
| |
| sym = *symbols; |
| if (bfd_asymbol_flavour (sym) == bfd_target_nlm_flavour) |
| { |
| nlm_symbol_type *nlm_sym; |
| bfd_size_type j; |
| |
| nlm_sym = (nlm_symbol_type *) sym; |
| for (j = 0; j < nlm_sym->rcnt; j++) |
| { |
| if (nlm_sym->relocs[j].section == sec) |
| { |
| *relptr = &nlm_sym->relocs[j].reloc; |
| (*relptr)->sym_ptr_ptr = symbols; |
| ++relptr; |
| ++ret; |
| } |
| } |
| } |
| } |
| |
| *relptr = NULL; |
| |
| return ret; |
| } |
| |
| /* Compute the section file positions for an NLM file. All variable |
| length data in the file headers must be set before this function is |
| called. If the variable length data is changed later, the |
| resulting object file will be incorrect. Unfortunately, there is |
| no way to check this. |
| |
| This routine also sets the Size and Offset fields in the fixed |
| header. |
| |
| It also looks over the symbols and moves any common symbols into |
| the .bss section; NLM has no way to represent a common symbol. |
| This approach means that either the symbols must already have been |
| set at this point, or there must be no common symbols. We need to |
| move the symbols at this point so that mangle_relocs can see the |
| final values. */ |
| |
| static boolean |
| nlm_compute_section_file_positions (abfd) |
| bfd *abfd; |
| { |
| file_ptr sofar; |
| asection *sec; |
| bfd_vma text, data, bss; |
| bfd_vma text_low, data_low; |
| unsigned int text_align, data_align, other_align; |
| file_ptr text_ptr, data_ptr, other_ptr; |
| asection *bss_sec; |
| asymbol **sym_ptr_ptr; |
| |
| if (abfd->output_has_begun == true) |
| return true; |
| |
| /* Make sure we have a section to hold uninitialized data. */ |
| bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| if (bss_sec == NULL) |
| { |
| if (!add_bfd_section (abfd, NLM_UNINITIALIZED_DATA_NAME, |
| (file_ptr) 0, (bfd_size_type) 0, |
| SEC_ALLOC)) |
| return false; |
| bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| } |
| |
| abfd->output_has_begun = true; |
| |
| /* The fixed header. */ |
| sofar = nlm_optional_prefix_size (abfd) + nlm_fixed_header_size (abfd); |
| |
| /* The variable header. */ |
| sofar += (sizeof (nlm_variable_header (abfd)->descriptionLength) |
| + nlm_variable_header (abfd)->descriptionLength + 1 |
| + NLM_TARGET_LONG_SIZE /* stackSize */ |
| + NLM_TARGET_LONG_SIZE /* reserved */ |
| + sizeof (nlm_variable_header (abfd)->oldThreadName) |
| + sizeof (nlm_variable_header (abfd)->screenNameLength) |
| + nlm_variable_header (abfd)->screenNameLength + 1 |
| + sizeof (nlm_variable_header (abfd)->threadNameLength) |
| + nlm_variable_header (abfd)->threadNameLength + 1); |
| |
| /* The auxiliary headers. */ |
| if (find_nonzero ((PTR) nlm_version_header (abfd), |
| sizeof (Nlm_Internal_Version_Header))) |
| sofar += sizeof (Nlm_External_Version_Header); |
| if (find_nonzero ((PTR) nlm_extended_header (abfd), |
| sizeof (Nlm_Internal_Extended_Header))) |
| sofar += sizeof (Nlm_External_Extended_Header); |
| if (find_nonzero ((PTR) nlm_copyright_header (abfd), |
| sizeof (Nlm_Internal_Copyright_Header))) |
| sofar += (sizeof (Nlm_External_Copyright_Header) |
| + nlm_copyright_header (abfd)->copyrightMessageLength + 1); |
| if (find_nonzero ((PTR) nlm_custom_header (abfd), |
| sizeof (Nlm_Internal_Custom_Header))) |
| sofar += (sizeof (Nlm_External_Custom_Header) |
| + nlm_custom_header (abfd)->hdrLength); |
| if (find_nonzero ((PTR) nlm_cygnus_ext_header (abfd), |
| sizeof (Nlm_Internal_Cygnus_Ext_Header))) |
| sofar += sizeof (Nlm_External_Custom_Header); |
| |
| /* Compute the section file positions in two passes. First get the |
| sizes of the text and data sections, and then set the file |
| positions. This code aligns the sections in the file using the |
| same alignment restrictions that apply to the sections in memory; |
| this may not be necessary. */ |
| text = 0; |
| text_low = (bfd_vma) - 1; |
| text_align = 0; |
| data = 0; |
| data_low = (bfd_vma) - 1; |
| data_align = 0; |
| bss = 0; |
| other_align = 0; |
| for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next) |
| { |
| flagword f; |
| |
| sec->_raw_size = BFD_ALIGN (sec->_raw_size, 1 << sec->alignment_power); |
| |
| f = bfd_get_section_flags (abfd, sec); |
| if (f & SEC_CODE) |
| { |
| text += sec->_raw_size; |
| if (bfd_get_section_vma (abfd, sec) < text_low) |
| text_low = bfd_get_section_vma (abfd, sec); |
| if (sec->alignment_power > text_align) |
| text_align = sec->alignment_power; |
| } |
| else if (f & SEC_DATA) |
| { |
| data += sec->_raw_size; |
| if (bfd_get_section_vma (abfd, sec) < data_low) |
| data_low = bfd_get_section_vma (abfd, sec); |
| if (sec->alignment_power > data_align) |
| data_align = sec->alignment_power; |
| } |
| else if (f & SEC_HAS_CONTENTS) |
| { |
| if (sec->alignment_power > other_align) |
| other_align = sec->alignment_power; |
| } |
| else if (f & SEC_ALLOC) |
| bss += sec->_raw_size; |
| } |
| |
| nlm_set_text_low (abfd, text_low); |
| nlm_set_data_low (abfd, data_low); |
| |
| if (nlm_no_uninitialized_data (abfd)) |
| { |
| /* This NetWare format does not use uninitialized data. We must |
| increase the size of the data section. We will never wind up |
| writing those file locations, so they will remain zero. */ |
| data += bss; |
| bss = 0; |
| } |
| |
| text_ptr = BFD_ALIGN (sofar, 1 << text_align); |
| data_ptr = BFD_ALIGN (text_ptr + text, 1 << data_align); |
| other_ptr = BFD_ALIGN (data_ptr + data, 1 << other_align); |
| |
| /* Fill in some fields in the header for which we now have the |
| information. */ |
| nlm_fixed_header (abfd)->codeImageOffset = text_ptr; |
| nlm_fixed_header (abfd)->codeImageSize = text; |
| nlm_fixed_header (abfd)->dataImageOffset = data_ptr; |
| nlm_fixed_header (abfd)->dataImageSize = data; |
| nlm_fixed_header (abfd)->uninitializedDataSize = bss; |
| |
| for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next) |
| { |
| flagword f; |
| |
| f = bfd_get_section_flags (abfd, sec); |
| |
| if (f & SEC_CODE) |
| { |
| sec->filepos = text_ptr; |
| text_ptr += sec->_raw_size; |
| } |
| else if (f & SEC_DATA) |
| { |
| sec->filepos = data_ptr; |
| data_ptr += sec->_raw_size; |
| } |
| else if (f & SEC_HAS_CONTENTS) |
| { |
| sec->filepos = other_ptr; |
| other_ptr += sec->_raw_size; |
| } |
| } |
| |
| nlm_fixed_header (abfd)->relocationFixupOffset = other_ptr; |
| |
| /* Move all common symbols into the .bss section. */ |
| |
| sym_ptr_ptr = bfd_get_outsymbols (abfd); |
| if (sym_ptr_ptr != NULL) |
| { |
| asymbol **sym_end; |
| bfd_vma add; |
| |
| sym_end = sym_ptr_ptr + bfd_get_symcount (abfd); |
| add = 0; |
| for (; sym_ptr_ptr < sym_end; sym_ptr_ptr++) |
| { |
| asymbol *sym; |
| bfd_vma size; |
| |
| sym = *sym_ptr_ptr; |
| |
| if (!bfd_is_com_section (bfd_get_section (sym))) |
| continue; |
| |
| /* Put the common symbol in the .bss section, and increase |
| the size of the .bss section by the size of the common |
| symbol (which is the old value of the symbol). */ |
| sym->section = bss_sec; |
| size = sym->value; |
| sym->value = bss_sec->_raw_size + add; |
| add += size; |
| add = BFD_ALIGN (add, 1 << bss_sec->alignment_power); |
| } |
| if (add != 0) |
| { |
| if (nlm_no_uninitialized_data (abfd)) |
| { |
| /* We could handle this case, but so far it hasn't been |
| necessary. */ |
| abort (); |
| } |
| nlm_fixed_header (abfd)->uninitializedDataSize += add; |
| bss_sec->_raw_size += add; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Set the contents of a section. To do this we need to know where |
| the section is going to be located in the output file. That means |
| that the sizes of all the sections must be set, and all the |
| variable size header information must be known. */ |
| |
| boolean |
| nlm_set_section_contents (abfd, section, location, offset, count) |
| bfd *abfd; |
| asection *section; |
| PTR location; |
| file_ptr offset; |
| bfd_size_type count; |
| { |
| if (abfd->output_has_begun == false |
| && nlm_compute_section_file_positions (abfd) == false) |
| return false; |
| |
| if (count == 0) |
| return true; |
| |
| /* i386 NetWare has a very restricted set of relocs. In order for |
| objcopy to work, the NLM i386 backend needs a chance to rework |
| the section contents so that its set of relocs will work. If all |
| the relocs are already acceptable, this will not do anything. */ |
| if (section->reloc_count != 0) |
| { |
| boolean (*mangle_relocs_func) PARAMS ((bfd *, asection *, PTR, |
| bfd_vma, bfd_size_type)); |
| |
| mangle_relocs_func = nlm_mangle_relocs_func (abfd); |
| if (mangle_relocs_func != NULL) |
| { |
| if (!(*mangle_relocs_func) (abfd, section, location, |
| (bfd_vma) offset, count)) |
| return false; |
| } |
| } |
| |
| if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0 |
| || bfd_write (location, 1, count, abfd) != count) |
| return false; |
| |
| return true; |
| } |
| |
| /* We need to sort a list of relocs associated with sections when we |
| write out the external relocs. */ |
| |
| static int |
| nlm_external_reloc_compare (p1, p2) |
| const void *p1; |
| const void *p2; |
| { |
| const struct reloc_and_sec *r1 = (const struct reloc_and_sec *) p1; |
| const struct reloc_and_sec *r2 = (const struct reloc_and_sec *) p2; |
| int cmp; |
| |
| cmp = strcmp ((*r1->rel->sym_ptr_ptr)->name, |
| (*r2->rel->sym_ptr_ptr)->name); |
| if (cmp != 0) |
| return cmp; |
| |
| /* We sort by address within symbol to make the sort more stable and |
| increase the chances that different hosts will generate bit for |
| bit equivalent results. */ |
| return (int) (r1->rel->address - r2->rel->address); |
| } |
| |
| /* Write out an NLM file. We write out the information in this order: |
| fixed header |
| variable header |
| auxiliary headers |
| code sections |
| data sections |
| other sections (custom data, messages, help, shared NLM, RPC, |
| module dependencies) |
| relocation fixups |
| external references (imports) |
| public symbols (exports) |
| debugging records |
| This is similar to the order used by the NetWare tools; the |
| difference is that NetWare puts the sections other than code, data |
| and custom data at the end of the NLM. It is convenient for us to |
| know where the sections are going to be before worrying about the |
| size of the other information. |
| |
| By the time this function is called, all the section data should |
| have been output using set_section_contents. Note that custom |
| data, the message file, the help file, the shared NLM file, the RPC |
| data, and the module dependencies are all considered to be |
| sections; the caller is responsible for filling in the offset and |
| length fields in the NLM headers. The relocation fixups and |
| imports are both obtained from the list of relocs attached to each |
| section. The exports and debugging records are obtained from the |
| list of outsymbols. */ |
| |
| boolean |
| nlm_write_object_contents (abfd) |
| bfd *abfd; |
| { |
| asection *sec; |
| boolean (*write_import_func) PARAMS ((bfd *, asection *, arelent *)); |
| bfd_size_type external_reloc_count, internal_reloc_count, i, c; |
| struct reloc_and_sec *external_relocs; |
| asymbol **sym_ptr_ptr; |
| file_ptr last; |
| boolean (*write_prefix_func) PARAMS ((bfd *)); |
| unsigned char *fixed_header = NULL; |
| |
| fixed_header = ((unsigned char *) |
| bfd_malloc ((size_t) nlm_fixed_header_size (abfd))); |
| if (fixed_header == NULL) |
| goto error_return; |
| |
| if (abfd->output_has_begun == false |
| && nlm_compute_section_file_positions (abfd) == false) |
| goto error_return; |
| |
| /* Write out the variable length headers. */ |
| if (bfd_seek (abfd, |
| nlm_optional_prefix_size (abfd) + nlm_fixed_header_size (abfd), |
| SEEK_SET) != 0) |
| goto error_return; |
| if (nlm_swap_variable_header_out (abfd) == false |
| || nlm_swap_auxiliary_headers_out (abfd) == false) |
| { |
| bfd_set_error (bfd_error_system_call); |
| goto error_return; |
| } |
| |
| /* A weak check on whether the section file positions were |
| reasonable. */ |
| if (bfd_tell (abfd) > nlm_fixed_header (abfd)->codeImageOffset) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| goto error_return; |
| } |
| |
| /* Advance to the relocs. */ |
| if (bfd_seek (abfd, nlm_fixed_header (abfd)->relocationFixupOffset, |
| SEEK_SET) != 0) |
| goto error_return; |
| |
| /* The format of the relocation entries is dependent upon the |
| particular target. We use an external routine to write the reloc |
| out. */ |
| write_import_func = nlm_write_import_func (abfd); |
| |
| /* Write out the internal relocation fixups. While we're looping |
| over the relocs, we also count the external relocs, which is |
| needed when they are written out below. */ |
| internal_reloc_count = 0; |
| external_reloc_count = 0; |
| for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next) |
| { |
| arelent **rel_ptr_ptr, **rel_end; |
| |
| if (sec->reloc_count == 0) |
| continue; |
| |
| /* We can only represent relocs within a code or data |
| section. We ignore them for a debugging section. */ |
| if ((bfd_get_section_flags (abfd, sec) & (SEC_CODE | SEC_DATA)) == 0) |
| continue; |
| |
| /* We need to know how to write out imports */ |
| if (write_import_func == NULL) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| goto error_return; |
| } |
| |
| rel_ptr_ptr = sec->orelocation; |
| rel_end = rel_ptr_ptr + sec->reloc_count; |
| for (; rel_ptr_ptr < rel_end; rel_ptr_ptr++) |
| { |
| arelent *rel; |
| asymbol *sym; |
| |
| rel = *rel_ptr_ptr; |
| sym = *rel->sym_ptr_ptr; |
| |
| if (! bfd_is_und_section (bfd_get_section (sym))) |
| { |
| ++internal_reloc_count; |
| if ((*write_import_func) (abfd, sec, rel) == false) |
| goto error_return; |
| } |
| else |
| ++external_reloc_count; |
| } |
| } |
| nlm_fixed_header (abfd)->numberOfRelocationFixups = internal_reloc_count; |
| |
| /* Write out the imports (relocs against external symbols). These |
| are output as a symbol name followed by all the relocs for that |
| symbol, so we must first gather together all the relocs against |
| external symbols and sort them. */ |
| external_relocs = |
| (struct reloc_and_sec *) bfd_alloc (abfd, |
| (external_reloc_count |
| * sizeof (struct reloc_and_sec))); |
| if (external_relocs == (struct reloc_and_sec *) NULL) |
| goto error_return; |
| i = 0; |
| for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next) |
| { |
| arelent **rel_ptr_ptr, **rel_end; |
| |
| if (sec->reloc_count == 0) |
| continue; |
| |
| rel_ptr_ptr = sec->orelocation; |
| rel_end = rel_ptr_ptr + sec->reloc_count; |
| for (; rel_ptr_ptr < rel_end; rel_ptr_ptr++) |
| { |
| arelent *rel; |
| asymbol *sym; |
| |
| rel = *rel_ptr_ptr; |
| sym = *rel->sym_ptr_ptr; |
| |
| if (! bfd_is_und_section (bfd_get_section (sym))) |
| continue; |
| |
| external_relocs[i].rel = rel; |
| external_relocs[i].sec = sec; |
| ++i; |
| } |
| } |
| |
| BFD_ASSERT (i == external_reloc_count); |
| |
| /* Sort the external relocs by name. */ |
| qsort ((PTR) external_relocs, (size_t) external_reloc_count, |
| sizeof (struct reloc_and_sec), nlm_external_reloc_compare); |
| |
| /* Write out the external relocs. */ |
| nlm_fixed_header (abfd)->externalReferencesOffset = bfd_tell (abfd); |
| c = 0; |
| i = 0; |
| while (i < external_reloc_count) |
| { |
| arelent *rel; |
| asymbol *sym; |
| bfd_size_type j, cnt; |
| |
| ++c; |
| |
| rel = external_relocs[i].rel; |
| sym = *rel->sym_ptr_ptr; |
| |
| cnt = 0; |
| for (j = i; |
| (j < external_reloc_count |
| && *external_relocs[j].rel->sym_ptr_ptr == sym); |
| j++) |
| ++cnt; |
| |
| if ((*nlm_write_external_func (abfd)) (abfd, cnt, sym, |
| &external_relocs[i]) |
| == false) |
| goto error_return; |
| |
| i += cnt; |
| } |
| |
| nlm_fixed_header (abfd)->numberOfExternalReferences = c; |
| |
| /* Write out the public symbols (exports). */ |
| sym_ptr_ptr = bfd_get_outsymbols (abfd); |
| if (sym_ptr_ptr != (asymbol **) NULL) |
| { |
| bfd_vma (*get_public_offset_func) PARAMS ((bfd *, asymbol *)); |
| boolean (*write_export_func) PARAMS ((bfd *, asymbol *, bfd_vma)); |
| |
| asymbol **sym_end; |
| |
| nlm_fixed_header (abfd)->publicsOffset = bfd_tell (abfd); |
| get_public_offset_func = nlm_get_public_offset_func (abfd); |
| write_export_func = nlm_write_export_func (abfd); |
| c = 0; |
| sym_end = sym_ptr_ptr + bfd_get_symcount (abfd); |
| for (; sym_ptr_ptr < sym_end; sym_ptr_ptr++) |
| { |
| asymbol *sym; |
| bfd_byte len; |
| bfd_vma offset; |
| bfd_byte temp[NLM_TARGET_LONG_SIZE]; |
| |
| sym = *sym_ptr_ptr; |
| |
| if ((sym->flags & (BSF_EXPORT | BSF_GLOBAL)) == 0 |
| || bfd_is_und_section (bfd_get_section (sym))) |
| continue; |
| |
| ++c; |
| |
| if (get_public_offset_func) |
| { |
| /* Most backends can use the code below, but |
| unfortunately some use a different scheme. */ |
| offset = (*get_public_offset_func) (abfd, sym); |
| } |
| else |
| { |
| offset = bfd_asymbol_value (sym); |
| sec = sym->section; |
| if (sec->flags & SEC_CODE) |
| { |
| offset -= nlm_get_text_low (abfd); |
| offset |= NLM_HIBIT; |
| } |
| else if (sec->flags & (SEC_DATA | SEC_ALLOC)) |
| { |
| /* SEC_ALLOC is for the .bss section. */ |
| offset -= nlm_get_data_low (abfd); |
| } |
| else |
| { |
| /* We can't handle an exported symbol that is not in |
| the code or data segment. */ |
| bfd_set_error (bfd_error_invalid_operation); |
| goto error_return; |
| } |
| } |
| |
| if (write_export_func) |
| { |
| if ((*write_export_func) (abfd, sym, offset) == false) |
| goto error_return; |
| } |
| else |
| { |
| len = strlen (sym->name); |
| if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) |
| != sizeof (bfd_byte)) |
| || bfd_write (sym->name, len, 1, abfd) != len) |
| goto error_return; |
| |
| put_word (abfd, offset, temp); |
| if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| goto error_return; |
| } |
| } |
| nlm_fixed_header (abfd)->numberOfPublics = c; |
| |
| /* Write out the debugging records. The NLM conversion program |
| wants to be able to inhibit this, so as a special hack if |
| debugInfoOffset is set to -1 we don't write any debugging |
| information. This can not be handled by fiddling with the |
| symbol table, because exported symbols appear in both the |
| exported symbol list and the debugging information. */ |
| if (nlm_fixed_header (abfd)->debugInfoOffset == (file_ptr) - 1) |
| { |
| nlm_fixed_header (abfd)->debugInfoOffset = 0; |
| nlm_fixed_header (abfd)->numberOfDebugRecords = 0; |
| } |
| else |
| { |
| nlm_fixed_header (abfd)->debugInfoOffset = bfd_tell (abfd); |
| c = 0; |
| sym_ptr_ptr = bfd_get_outsymbols (abfd); |
| sym_end = sym_ptr_ptr + bfd_get_symcount (abfd); |
| for (; sym_ptr_ptr < sym_end; sym_ptr_ptr++) |
| { |
| asymbol *sym; |
| bfd_byte type, len; |
| bfd_vma offset; |
| bfd_byte temp[NLM_TARGET_LONG_SIZE]; |
| |
| sym = *sym_ptr_ptr; |
| |
| /* The NLM notion of a debugging symbol is actually what |
| BFD calls a local or global symbol. What BFD calls a |
| debugging symbol NLM does not understand at all. */ |
| if ((sym->flags & (BSF_LOCAL | BSF_GLOBAL | BSF_EXPORT)) == 0 |
| || (sym->flags & BSF_DEBUGGING) != 0 |
| || bfd_is_und_section (bfd_get_section (sym))) |
| continue; |
| |
| ++c; |
| |
| offset = bfd_asymbol_value (sym); |
| sec = sym->section; |
| if (sec->flags & SEC_CODE) |
| { |
| offset -= nlm_get_text_low (abfd); |
| type = 1; |
| } |
| else if (sec->flags & (SEC_DATA | SEC_ALLOC)) |
| { |
| /* SEC_ALLOC is for the .bss section. */ |
| offset -= nlm_get_data_low (abfd); |
| type = 0; |
| } |
| else |
| type = 2; |
| |
| /* The type is 0 for data, 1 for code, 2 for absolute. */ |
| if (bfd_write (&type, sizeof (bfd_byte), 1, abfd) |
| != sizeof (bfd_byte)) |
| goto error_return; |
| |
| put_word (abfd, offset, temp); |
| if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp)) |
| goto error_return; |
| |
| len = strlen (sym->name); |
| if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) |
| != sizeof (bfd_byte)) |
| || bfd_write (sym->name, len, 1, abfd) != len) |
| goto error_return; |
| } |
| nlm_fixed_header (abfd)->numberOfDebugRecords = c; |
| } |
| } |
| |
| /* NLMLINK fills in offset values even if there is no data, so we do |
| the same. */ |
| last = bfd_tell (abfd); |
| if (nlm_fixed_header (abfd)->codeImageOffset == 0) |
| nlm_fixed_header (abfd)->codeImageOffset = last; |
| if (nlm_fixed_header (abfd)->dataImageOffset == 0) |
| nlm_fixed_header (abfd)->dataImageOffset = last; |
| if (nlm_fixed_header (abfd)->customDataOffset == 0) |
| nlm_fixed_header (abfd)->customDataOffset = last; |
| if (nlm_fixed_header (abfd)->moduleDependencyOffset == 0) |
| nlm_fixed_header (abfd)->moduleDependencyOffset = last; |
| if (nlm_fixed_header (abfd)->relocationFixupOffset == 0) |
| nlm_fixed_header (abfd)->relocationFixupOffset = last; |
| if (nlm_fixed_header (abfd)->externalReferencesOffset == 0) |
| nlm_fixed_header (abfd)->externalReferencesOffset = last; |
| if (nlm_fixed_header (abfd)->publicsOffset == 0) |
| nlm_fixed_header (abfd)->publicsOffset = last; |
| if (nlm_fixed_header (abfd)->debugInfoOffset == 0) |
| nlm_fixed_header (abfd)->debugInfoOffset = last; |
| |
| /* At this point everything has been written out except the fixed |
| header. */ |
| memcpy (nlm_fixed_header (abfd)->signature, nlm_signature (abfd), |
| NLM_SIGNATURE_SIZE); |
| nlm_fixed_header (abfd)->version = NLM_HEADER_VERSION; |
| nlm_fixed_header (abfd)->codeStartOffset = |
| (bfd_get_start_address (abfd) |
| - nlm_get_text_low (abfd)); |
| |
| /* We have no convenient way for the caller to pass in the exit |
| procedure or the check unload procedure, so the caller must set |
| the values in the header to the values of the symbols. */ |
| nlm_fixed_header (abfd)->exitProcedureOffset -= nlm_get_text_low (abfd); |
| if (nlm_fixed_header (abfd)->checkUnloadProcedureOffset != 0) |
| nlm_fixed_header (abfd)->checkUnloadProcedureOffset -= |
| nlm_get_text_low (abfd); |
| |
| if (bfd_seek (abfd, 0, SEEK_SET) != 0) |
| goto error_return; |
| |
| write_prefix_func = nlm_write_prefix_func (abfd); |
| if (write_prefix_func) |
| { |
| if ((*write_prefix_func) (abfd) == false) |
| goto error_return; |
| } |
| |
| BFD_ASSERT ((bfd_size_type) bfd_tell (abfd) |
| == nlm_optional_prefix_size (abfd)); |
| |
| nlm_swap_fixed_header_out (abfd, nlm_fixed_header (abfd), fixed_header); |
| if (bfd_write (fixed_header, nlm_fixed_header_size (abfd), 1, abfd) |
| != nlm_fixed_header_size (abfd)) |
| goto error_return; |
| |
| if (fixed_header != NULL) |
| free (fixed_header); |
| return true; |
| |
| error_return: |
| if (fixed_header != NULL) |
| free (fixed_header); |
| return false; |
| } |