| /* Read HP PA/Risc object files for GDB. |
| Copyright 1991, 1992, 1996, 1999 Free Software Foundation, Inc. |
| Written by Fred Fish at Cygnus Support. |
| |
| This file is part of GDB. |
| |
| 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 "defs.h" |
| #include "bfd.h" |
| #include <syms.h> |
| #include "symtab.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "stabsread.h" |
| #include "gdb-stabs.h" |
| #include "complaints.h" |
| #include "gdb_string.h" |
| #include "demangle.h" |
| #include "som.h" |
| #include "libhppa.h" |
| |
| /* Various things we might complain about... */ |
| |
| static void |
| som_symfile_init PARAMS ((struct objfile *)); |
| |
| static void |
| som_new_init PARAMS ((struct objfile *)); |
| |
| static void |
| som_symfile_read PARAMS ((struct objfile *, int)); |
| |
| static void |
| som_symfile_finish PARAMS ((struct objfile *)); |
| |
| static void |
| som_symtab_read PARAMS ((bfd *, struct objfile *, |
| struct section_offsets *)); |
| |
| static void |
| som_symfile_offsets PARAMS ((struct objfile *, struct section_addr_info *)); |
| |
| /* FIXME: These should really be in a common header somewhere */ |
| |
| extern void |
| hpread_build_psymtabs PARAMS ((struct objfile *, int)); |
| |
| extern void |
| hpread_symfile_finish PARAMS ((struct objfile *)); |
| |
| extern void |
| hpread_symfile_init PARAMS ((struct objfile *)); |
| |
| extern void |
| do_pxdb PARAMS ((bfd *)); |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| som_symtab_read -- read the symbol table of a SOM file |
| |
| SYNOPSIS |
| |
| void som_symtab_read (bfd *abfd, struct objfile *objfile, |
| struct section_offsets *section_offsets) |
| |
| DESCRIPTION |
| |
| Given an open bfd, a base address to relocate symbols to, and a |
| flag that specifies whether or not this bfd is for an executable |
| or not (may be shared library for example), add all the global |
| function and data symbols to the minimal symbol table. |
| */ |
| |
| static void |
| som_symtab_read (abfd, objfile, section_offsets) |
| bfd *abfd; |
| struct objfile *objfile; |
| struct section_offsets *section_offsets; |
| { |
| unsigned int number_of_symbols; |
| int val, dynamic; |
| char *stringtab; |
| asection *shlib_info; |
| struct symbol_dictionary_record *buf, *bufp, *endbufp; |
| char *symname; |
| CONST int symsize = sizeof (struct symbol_dictionary_record); |
| CORE_ADDR text_offset, data_offset; |
| |
| |
| text_offset = ANOFFSET (section_offsets, 0); |
| data_offset = ANOFFSET (section_offsets, 1); |
| |
| number_of_symbols = bfd_get_symcount (abfd); |
| |
| buf = alloca (symsize * number_of_symbols); |
| bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); |
| val = bfd_read (buf, symsize * number_of_symbols, 1, abfd); |
| if (val != symsize * number_of_symbols) |
| error ("Couldn't read symbol dictionary!"); |
| |
| stringtab = alloca (obj_som_stringtab_size (abfd)); |
| bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); |
| val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd); |
| if (val != obj_som_stringtab_size (abfd)) |
| error ("Can't read in HP string table."); |
| |
| /* We need to determine if objfile is a dynamic executable (so we |
| can do the right thing for ST_ENTRY vs ST_CODE symbols). |
| |
| There's nothing in the header which easily allows us to do |
| this. The only reliable way I know of is to check for the |
| existance of a $SHLIB_INFO$ section with a non-zero size. */ |
| /* The code below is not a reliable way to check whether an |
| * executable is dynamic, so I commented it out - RT |
| * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
| * if (shlib_info) |
| * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0); |
| * else |
| * dynamic = 0; |
| */ |
| /* I replaced the code with a simple check for text offset not being |
| * zero. Still not 100% reliable, but a more reliable way of asking |
| * "is this a dynamic executable?" than the above. RT |
| */ |
| dynamic = (text_offset != 0); |
| |
| endbufp = buf + number_of_symbols; |
| for (bufp = buf; bufp < endbufp; ++bufp) |
| { |
| enum minimal_symbol_type ms_type; |
| |
| QUIT; |
| |
| switch (bufp->symbol_scope) |
| { |
| case SS_UNIVERSAL: |
| case SS_EXTERNAL: |
| switch (bufp->symbol_type) |
| { |
| case ST_SYM_EXT: |
| case ST_ARG_EXT: |
| continue; |
| |
| case ST_CODE: |
| case ST_PRI_PROG: |
| case ST_SEC_PROG: |
| case ST_MILLICODE: |
| symname = bufp->name.n_strx + stringtab; |
| ms_type = mst_text; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| case ST_ENTRY: |
| symname = bufp->name.n_strx + stringtab; |
| /* For a dynamic executable, ST_ENTRY symbols are |
| the stubs, while the ST_CODE symbol is the real |
| function. */ |
| if (dynamic) |
| ms_type = mst_solib_trampoline; |
| else |
| ms_type = mst_text; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| case ST_STUB: |
| symname = bufp->name.n_strx + stringtab; |
| ms_type = mst_solib_trampoline; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| case ST_DATA: |
| symname = bufp->name.n_strx + stringtab; |
| bufp->symbol_value += data_offset; |
| ms_type = mst_data; |
| break; |
| default: |
| continue; |
| } |
| break; |
| |
| #if 0 |
| /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ |
| case SS_GLOBAL: |
| #endif |
| case SS_LOCAL: |
| switch (bufp->symbol_type) |
| { |
| case ST_SYM_EXT: |
| case ST_ARG_EXT: |
| continue; |
| |
| case ST_CODE: |
| symname = bufp->name.n_strx + stringtab; |
| ms_type = mst_file_text; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| |
| check_strange_names: |
| /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local |
| label prefixes for stabs, constant data, etc. So we need |
| only filter out L$ symbols which are left in due to |
| limitations in how GAS generates SOM relocations. |
| |
| When linking in the HPUX C-library the HP linker has |
| the nasty habit of placing section symbols from the literal |
| subspaces in the middle of the program's text. Filter |
| those out as best we can. Check for first and last character |
| being '$'. |
| |
| And finally, the newer HP compilers emit crud like $PIC_foo$N |
| in some circumstance (PIC code I guess). It's also claimed |
| that they emit D$ symbols too. What stupidity. */ |
| if ((symname[0] == 'L' && symname[1] == '$') |
| || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
| || (symname[0] == 'D' && symname[1] == '$') |
| || (strncmp (symname, "$PIC", 4) == 0)) |
| continue; |
| break; |
| |
| case ST_PRI_PROG: |
| case ST_SEC_PROG: |
| case ST_MILLICODE: |
| symname = bufp->name.n_strx + stringtab; |
| ms_type = mst_file_text; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| case ST_ENTRY: |
| symname = bufp->name.n_strx + stringtab; |
| /* For a dynamic executable, ST_ENTRY symbols are |
| the stubs, while the ST_CODE symbol is the real |
| function. */ |
| if (dynamic) |
| ms_type = mst_solib_trampoline; |
| else |
| ms_type = mst_file_text; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| case ST_STUB: |
| symname = bufp->name.n_strx + stringtab; |
| ms_type = mst_solib_trampoline; |
| bufp->symbol_value += text_offset; |
| #ifdef SMASH_TEXT_ADDRESS |
| SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| #endif |
| break; |
| |
| |
| case ST_DATA: |
| symname = bufp->name.n_strx + stringtab; |
| bufp->symbol_value += data_offset; |
| ms_type = mst_file_data; |
| goto check_strange_names; |
| |
| default: |
| continue; |
| } |
| break; |
| |
| /* This can happen for common symbols when -E is passed to the |
| final link. No idea _why_ that would make the linker force |
| common symbols to have an SS_UNSAT scope, but it does. |
| |
| This also happens for weak symbols, but their type is |
| ST_DATA. */ |
| case SS_UNSAT: |
| switch (bufp->symbol_type) |
| { |
| case ST_STORAGE: |
| case ST_DATA: |
| symname = bufp->name.n_strx + stringtab; |
| bufp->symbol_value += data_offset; |
| ms_type = mst_data; |
| break; |
| |
| default: |
| continue; |
| } |
| break; |
| |
| default: |
| continue; |
| } |
| |
| if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) |
| error ("Invalid symbol data; bad HP string table offset: %d", |
| bufp->name.n_strx); |
| |
| prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
| objfile); |
| } |
| } |
| |
| /* Scan and build partial symbols for a symbol file. |
| We have been initialized by a call to som_symfile_init, which |
| currently does nothing. |
| |
| SECTION_OFFSETS is a set of offsets to apply to relocate the symbols |
| in each section. This is ignored, as it isn't needed for SOM. |
| |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). |
| |
| This function only does the minimum work necessary for letting the |
| user "name" things symbolically; it does not read the entire symtab. |
| Instead, it reads the external and static symbols and puts them in partial |
| symbol tables. When more extensive information is requested of a |
| file, the corresponding partial symbol table is mutated into a full |
| fledged symbol table by going back and reading the symbols |
| for real. |
| |
| We look for sections with specific names, to tell us what debug |
| format to look for: FIXME!!! |
| |
| somstab_build_psymtabs() handles STABS symbols. |
| |
| Note that SOM files have a "minimal" symbol table, which is vaguely |
| reminiscent of a COFF symbol table, but has only the minimal information |
| necessary for linking. We process this also, and use the information to |
| build gdb's minimal symbol table. This gives us some minimal debugging |
| capability even for files compiled without -g. */ |
| |
| static void |
| som_symfile_read (objfile, mainline) |
| struct objfile *objfile; |
| int mainline; |
| { |
| bfd *abfd = objfile->obfd; |
| struct cleanup *back_to; |
| |
| do_pxdb (symfile_bfd_open (objfile->name)); |
| |
| init_minimal_symbol_collection (); |
| back_to = make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); |
| |
| /* Read in the import list and the export list. Currently |
| the export list isn't used; the import list is used in |
| hp-symtab-read.c to handle static vars declared in other |
| shared libraries. */ |
| init_import_symbols (objfile); |
| #if 0 /* Export symbols not used today 1997-08-05 */ |
| init_export_symbols (objfile); |
| #else |
| objfile->export_list = NULL; |
| objfile->export_list_size = 0; |
| #endif |
| |
| /* Process the normal SOM symbol table first. |
| This reads in the DNTT and string table, but doesn't |
| actually scan the DNTT. It does scan the linker symbol |
| table and thus build up a "minimal symbol table". */ |
| |
| som_symtab_read (abfd, objfile, objfile->section_offsets); |
| |
| /* Now read information from the stabs debug sections. |
| This is a no-op for SOM. |
| Perhaps it is intended for some kind of mixed STABS/SOM |
| situation? */ |
| stabsect_build_psymtabs (objfile, mainline, |
| "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
| |
| /* Now read the native debug information. |
| This builds the psymtab. This used to be done via a scan of |
| the DNTT, but is now done via the PXDB-built quick-lookup tables |
| together with a scan of the GNTT. See hp-psymtab-read.c. */ |
| hpread_build_psymtabs (objfile, mainline); |
| |
| /* Install any minimal symbols that have been collected as the current |
| minimal symbols for this objfile. |
| Further symbol-reading is done incrementally, file-by-file, |
| in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c |
| contains the code to do the actual DNTT scanning and symtab building. */ |
| install_minimal_symbols (objfile); |
| |
| /* Force hppa-tdep.c to re-read the unwind descriptors. */ |
| objfile->obj_private = NULL; |
| do_cleanups (back_to); |
| } |
| |
| /* Initialize anything that needs initializing when a completely new symbol |
| file is specified (not just adding some symbols from another file, e.g. a |
| shared library). |
| |
| We reinitialize buildsym, since we may be reading stabs from a SOM file. */ |
| |
| static void |
| som_new_init (ignore) |
| struct objfile *ignore; |
| { |
| stabsread_new_init (); |
| buildsym_new_init (); |
| } |
| |
| /* Perform any local cleanups required when we are done with a particular |
| objfile. I.E, we are in the process of discarding all symbol information |
| for an objfile, freeing up all memory held for it, and unlinking the |
| objfile struct from the global list of known objfiles. */ |
| |
| static void |
| som_symfile_finish (objfile) |
| struct objfile *objfile; |
| { |
| if (objfile->sym_stab_info != NULL) |
| { |
| mfree (objfile->md, objfile->sym_stab_info); |
| } |
| hpread_symfile_finish (objfile); |
| } |
| |
| /* SOM specific initialization routine for reading symbols. */ |
| |
| static void |
| som_symfile_init (objfile) |
| struct objfile *objfile; |
| { |
| /* SOM objects may be reordered, so set OBJF_REORDERED. If we |
| find this causes a significant slowdown in gdb then we could |
| set it in the debug symbol readers only when necessary. */ |
| objfile->flags |= OBJF_REORDERED; |
| hpread_symfile_init (objfile); |
| } |
| |
| /* SOM specific parsing routine for section offsets. |
| |
| Plain and simple for now. */ |
| |
| static void |
| som_symfile_offsets (objfile, addrs) |
| struct objfile *objfile; |
| struct section_addr_info *addrs; |
| { |
| int i; |
| |
| objfile->num_sections = SECT_OFF_MAX; |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| |
| /* First see if we're a shared library. If so, get the section |
| offsets from the library, else get them from addrs. */ |
| if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
| { |
| for (i = 0; i < SECT_OFF_MAX; i++) |
| ANOFFSET (objfile->section_offsets, i) = addrs -> text_addr; |
| } |
| } |
| |
| /* Read in and initialize the SOM import list which is present |
| for all executables and shared libraries. The import list |
| consists of the symbols that are referenced in OBJFILE but |
| not defined there. (Variables that are imported are dealt |
| with as "loc_indirect" vars.) |
| Return value = number of import symbols read in. */ |
| int |
| init_import_symbols (objfile) |
| struct objfile *objfile; |
| { |
| unsigned int import_list; |
| unsigned int import_list_size; |
| unsigned int string_table; |
| unsigned int string_table_size; |
| char *string_buffer; |
| register int i; |
| register int j; |
| register int k; |
| asection *text_section; /* section handle */ |
| unsigned int dl_header[12]; /* SOM executable header */ |
| |
| /* A struct for an entry in the SOM import list */ |
| typedef struct |
| { |
| int name; /* index into the string table */ |
| short dont_care1; /* we don't use this */ |
| unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ |
| unsigned int reserved2:8; /* not used */ |
| } |
| SomImportEntry; |
| |
| /* We read 100 entries in at a time from the disk file. */ |
| #define SOM_READ_IMPORTS_NUM 100 |
| #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) |
| SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
| |
| /* Initialize in case we error out */ |
| objfile->import_list = NULL; |
| objfile->import_list_size = 0; |
| |
| /* It doesn't work, for some reason, to read in space $TEXT$; |
| the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
| text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
| if (!text_section) |
| return 0; |
| /* Get the SOM executable header */ |
| bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
| |
| /* Check header version number for 10.x HP-UX */ |
| /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. |
| FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
| if (dl_header[0] != 93092112) |
| return 0; |
| |
| import_list = dl_header[4]; |
| import_list_size = dl_header[5]; |
| if (!import_list_size) |
| return 0; |
| string_table = dl_header[10]; |
| string_table_size = dl_header[11]; |
| if (!string_table_size) |
| return 0; |
| |
| /* Suck in SOM string table */ |
| string_buffer = (char *) xmalloc (string_table_size); |
| bfd_get_section_contents (objfile->obfd, text_section, string_buffer, |
| string_table, string_table_size); |
| |
| /* Allocate import list in the psymbol obstack; this has nothing |
| to do with psymbols, just a matter of convenience. We want the |
| import list to be freed when the objfile is deallocated */ |
| objfile->import_list |
| = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
| import_list_size * sizeof (ImportEntry)); |
| |
| /* Read in the import entries, a bunch at a time */ |
| for (j = 0, k = 0; |
| j < (import_list_size / SOM_READ_IMPORTS_NUM); |
| j++) |
| { |
| bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
| SOM_READ_IMPORTS_CHUNK_SIZE); |
| for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) |
| { |
| if (buffer[i].type != (unsigned char) 0) |
| { |
| objfile->import_list[k] |
| = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
| /* Some day we might want to record the type and other information too */ |
| } |
| else /* null type */ |
| objfile->import_list[k] = NULL; |
| |
| } |
| } |
| |
| /* Get the leftovers */ |
| if (k < import_list_size) |
| bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| import_list + k * sizeof (SomImportEntry), |
| (import_list_size - k) * sizeof (SomImportEntry)); |
| for (i = 0; k < import_list_size; i++, k++) |
| { |
| if (buffer[i].type != (unsigned char) 0) |
| { |
| objfile->import_list[k] |
| = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
| /* Some day we might want to record the type and other information too */ |
| } |
| else |
| objfile->import_list[k] = NULL; |
| } |
| |
| objfile->import_list_size = import_list_size; |
| free (string_buffer); |
| return import_list_size; |
| } |
| |
| /* Read in and initialize the SOM export list which is present |
| for all executables and shared libraries. The import list |
| consists of the symbols that are referenced in OBJFILE but |
| not defined there. (Variables that are imported are dealt |
| with as "loc_indirect" vars.) |
| Return value = number of import symbols read in. */ |
| int |
| init_export_symbols (objfile) |
| struct objfile *objfile; |
| { |
| unsigned int export_list; |
| unsigned int export_list_size; |
| unsigned int string_table; |
| unsigned int string_table_size; |
| char *string_buffer; |
| register int i; |
| register int j; |
| register int k; |
| asection *text_section; /* section handle */ |
| unsigned int dl_header[12]; /* SOM executable header */ |
| |
| /* A struct for an entry in the SOM export list */ |
| typedef struct |
| { |
| int next; /* for hash table use -- we don't use this */ |
| int name; /* index into string table */ |
| int value; /* offset or plabel */ |
| int dont_care1; /* not used */ |
| unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ |
| char dont_care2; /* not used */ |
| short dont_care3; /* not used */ |
| } |
| SomExportEntry; |
| |
| /* We read 100 entries in at a time from the disk file. */ |
| #define SOM_READ_EXPORTS_NUM 100 |
| #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) |
| SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
| |
| /* Initialize in case we error out */ |
| objfile->export_list = NULL; |
| objfile->export_list_size = 0; |
| |
| /* It doesn't work, for some reason, to read in space $TEXT$; |
| the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
| text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
| if (!text_section) |
| return 0; |
| /* Get the SOM executable header */ |
| bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
| |
| /* Check header version number for 10.x HP-UX */ |
| /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. |
| FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
| if (dl_header[0] != 93092112) |
| return 0; |
| |
| export_list = dl_header[8]; |
| export_list_size = dl_header[9]; |
| if (!export_list_size) |
| return 0; |
| string_table = dl_header[10]; |
| string_table_size = dl_header[11]; |
| if (!string_table_size) |
| return 0; |
| |
| /* Suck in SOM string table */ |
| string_buffer = (char *) xmalloc (string_table_size); |
| bfd_get_section_contents (objfile->obfd, text_section, string_buffer, |
| string_table, string_table_size); |
| |
| /* Allocate export list in the psymbol obstack; this has nothing |
| to do with psymbols, just a matter of convenience. We want the |
| export list to be freed when the objfile is deallocated */ |
| objfile->export_list |
| = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
| export_list_size * sizeof (ExportEntry)); |
| |
| /* Read in the export entries, a bunch at a time */ |
| for (j = 0, k = 0; |
| j < (export_list_size / SOM_READ_EXPORTS_NUM); |
| j++) |
| { |
| bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
| SOM_READ_EXPORTS_CHUNK_SIZE); |
| for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) |
| { |
| if (buffer[i].type != (unsigned char) 0) |
| { |
| objfile->export_list[k].name |
| = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
| objfile->export_list[k].address = buffer[i].value; |
| /* Some day we might want to record the type and other information too */ |
| } |
| else |
| /* null type */ |
| { |
| objfile->export_list[k].name = NULL; |
| objfile->export_list[k].address = 0; |
| } |
| } |
| } |
| |
| /* Get the leftovers */ |
| if (k < export_list_size) |
| bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| export_list + k * sizeof (SomExportEntry), |
| (export_list_size - k) * sizeof (SomExportEntry)); |
| for (i = 0; k < export_list_size; i++, k++) |
| { |
| if (buffer[i].type != (unsigned char) 0) |
| { |
| objfile->export_list[k].name |
| = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
| /* Some day we might want to record the type and other information too */ |
| objfile->export_list[k].address = buffer[i].value; |
| } |
| else |
| { |
| objfile->export_list[k].name = NULL; |
| objfile->export_list[k].address = 0; |
| } |
| } |
| |
| objfile->export_list_size = export_list_size; |
| free (string_buffer); |
| return export_list_size; |
| } |
| |
| |
| |
| /* Register that we are able to handle SOM object file formats. */ |
| |
| static struct sym_fns som_sym_fns = |
| { |
| bfd_target_som_flavour, |
| som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| som_symfile_read, /* sym_read: read a symbol file into symtab */ |
| som_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_somread () |
| { |
| add_symtab_fns (&som_sym_fns); |
| } |