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author | Jeff Law <law@redhat.com> | 1994-06-27 06:09:40 +0000 |
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committer | Jeff Law <law@redhat.com> | 1994-06-27 06:09:40 +0000 |
commit | bfe2f12bd0318a10cfb25fc3530ce55d47190804 (patch) | |
tree | 3e90482a45ae322739214373ba113584ccb0c309 /gdb/paread.c | |
parent | 6dde66d5693b9e45ebf7c1bdd98baf807bbb4708 (diff) | |
download | fsf-binutils-gdb-bfe2f12bd0318a10cfb25fc3530ce55d47190804.zip fsf-binutils-gdb-bfe2f12bd0318a10cfb25fc3530ce55d47190804.tar.gz fsf-binutils-gdb-bfe2f12bd0318a10cfb25fc3530ce55d47190804.tar.bz2 |
* somread.c: Renamed from paread.c. Changed function names and
comments to reflect that this file deals with SOM (an object file
format), rather than the PA (a cpu).
(Makefile.in): Chaned appropriately.
(config/pa/hppabsd.mh, config/pa/hppahpux.mh): Likewise.
* dbxread.c (somstab_build_psymtabs): Renamed from
pastab_build_psymtabs.
Diffstat (limited to 'gdb/paread.c')
-rw-r--r-- | gdb/paread.c | 547 |
1 files changed, 0 insertions, 547 deletions
diff --git a/gdb/paread.c b/gdb/paread.c index 2acdccd..e69de29 100644 --- a/gdb/paread.c +++ b/gdb/paread.c @@ -1,547 +0,0 @@ -/* Read HP PA/Risc object files for GDB. - Copyright 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include "defs.h" -#include "bfd.h" -#include <time.h> /* For time_t in libbfd.h. */ -#include <sys/types.h> /* For time_t, if not in time.h. */ -#include "libbfd.h" -#include "som.h" -#include "libhppa.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 <string.h> -#include "demangle.h" -#include <sys/file.h> - -/* Size of n_value and n_strx fields in a stab symbol. */ -#define BYTES_IN_WORD 4 - -#include "aout/aout64.h" - -/* Various things we might complain about... */ - -static void -pa_symfile_init PARAMS ((struct objfile *)); - -static void -pa_new_init PARAMS ((struct objfile *)); - -static void -pa_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); - -static void -pa_symfile_finish PARAMS ((struct objfile *)); - -static void -pa_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *)); - -static void -free_painfo PARAMS ((PTR)); - -static struct section_offsets * -pa_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR)); - -static void -record_minimal_symbol PARAMS ((char *, CORE_ADDR, - enum minimal_symbol_type, - struct objfile *)); - -static void -record_minimal_symbol (name, address, ms_type, objfile) - char *name; - CORE_ADDR address; - enum minimal_symbol_type ms_type; - struct objfile *objfile; -{ - name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); - prim_record_minimal_symbol (name, address, ms_type, objfile); -} - -/* - -LOCAL FUNCTION - - pa_symtab_read -- read the symbol table of a PA file - -SYNOPSIS - - void pa_symtab_read (bfd *abfd, CORE_ADDR addr, - struct objfile *objfile) - -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 -pa_symtab_read (abfd, addr, objfile) - bfd *abfd; - CORE_ADDR addr; - struct objfile *objfile; -{ - unsigned int number_of_symbols; - unsigned int i; - 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); - - number_of_symbols = bfd_get_symcount (abfd); - - buf = alloca (symsize * number_of_symbols); - bfd_seek (abfd, obj_som_sym_filepos (abfd), L_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), L_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. */ - 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; - - 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; -#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; -#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; -#ifdef SMASH_TEXT_ADDRESS - SMASH_TEXT_ADDRESS (bufp->symbol_value); -#endif - break; - - case ST_DATA: - symname = bufp->name.n_strx + stringtab; - 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; -#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 '$'. */ - if ((symname[0] == 'L' && symname[1] == '$') - || (symname[0] == '$' && symname[strlen(symname) - 1] == '$')) - continue; - break; - - case ST_PRI_PROG: - case ST_SEC_PROG: - case ST_MILLICODE: - symname = bufp->name.n_strx + stringtab; - ms_type = mst_file_text; -#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; -#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; -#ifdef SMASH_TEXT_ADDRESS - SMASH_TEXT_ADDRESS (bufp->symbol_value); -#endif - break; - - - case ST_DATA: - symname = bufp->name.n_strx + stringtab; - ms_type = mst_file_data; - goto check_strange_names; - - 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); - - record_minimal_symbol (symname, - bufp->symbol_value, ms_type, - objfile); - } - - install_minimal_symbols (objfile); -} - -/* Scan and build partial symbols for a symbol file. - We have been initialized by a call to pa_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 the PA. - - 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!!! - - pastab_build_psymtabs() handles STABS symbols. - - Note that PA 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 -pa_symfile_read (objfile, section_offsets, mainline) - struct objfile *objfile; - struct section_offsets *section_offsets; - int mainline; -{ - bfd *abfd = objfile->obfd; - struct cleanup *back_to; - CORE_ADDR offset; - - init_minimal_symbol_collection (); - back_to = make_cleanup (discard_minimal_symbols, 0); - - make_cleanup (free_painfo, (PTR) objfile); - - /* Process the normal PA symbol table first. */ - - /* FIXME, should take a section_offsets param, not just an offset. */ - - offset = ANOFFSET (section_offsets, 0); - pa_symtab_read (abfd, offset, objfile); - - /* Now process debugging information, which is contained in - special PA sections. */ - - pastab_build_psymtabs (objfile, section_offsets, mainline); - - do_cleanups (back_to); -} - -/* This cleans up the objfile's sym_stab_info pointer, and the chain of - stab_section_info's, that might be dangling from it. */ - -static void -free_painfo (objp) - PTR objp; -{ - struct objfile *objfile = (struct objfile *)objp; - struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *) - objfile->sym_stab_info; - struct stab_section_info *ssi, *nssi; - - ssi = dbxinfo->stab_section_info; - while (ssi) - { - nssi = ssi->next; - mfree (objfile->md, ssi); - ssi = nssi; - } - - dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */ -} - -/* 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 PA file. */ - -static void -pa_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 -pa_symfile_finish (objfile) - struct objfile *objfile; -{ - if (objfile -> sym_stab_info != NULL) - { - mfree (objfile -> md, objfile -> sym_stab_info); - } -} - -/* PA specific initialization routine for reading symbols. - - It is passed a pointer to a struct sym_fns which contains, among other - things, the BFD for the file whose symbols are being read, and a slot for - a pointer to "private data" which we can fill with goodies. - - This routine is almost a complete ripoff of dbx_symfile_init. The - common parts of these routines should be extracted and used instead of - duplicating this code. FIXME. */ - -static void -pa_symfile_init (objfile) - struct objfile *objfile; -{ - int val; - bfd *sym_bfd = objfile->obfd; - char *name = bfd_get_filename (sym_bfd); - asection *stabsect; /* Section containing symbol table entries */ - asection *stringsect; /* Section containing symbol name strings */ - - stabsect = bfd_get_section_by_name (sym_bfd, "$GDB_SYMBOLS$"); - stringsect = bfd_get_section_by_name (sym_bfd, "$GDB_STRINGS$"); - - /* Allocate struct to keep track of the symfile */ - objfile->sym_stab_info = (PTR) - xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); - - memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); - - - /* FIXME POKING INSIDE BFD DATA STRUCTURES */ -#define STRING_TABLE_OFFSET (stringsect->filepos) -#define SYMBOL_TABLE_OFFSET (stabsect->filepos) - - /* FIXME POKING INSIDE BFD DATA STRUCTURES */ - - DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; - DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, "$TEXT$"); - if (!DBX_TEXT_SECT (objfile)) - error ("Can't find $TEXT$ section in symbol file"); - - if (!stabsect) - return; - - if (!stringsect) - error ("Found stabs, but not string section"); - - /* FIXME: I suspect this should be external_nlist. The size of host - types like long and bfd_vma should not affect how we read the - file. */ - DBX_SYMBOL_SIZE (objfile) = sizeof (struct internal_nlist); - DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect) - / DBX_SYMBOL_SIZE (objfile); - DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; - - /* Read the string table and stash it away in the psymbol_obstack. It is - only needed as long as we need to expand psymbols into full symbols, - so when we blow away the psymbol the string table goes away as well. - Note that gdb used to use the results of attempting to malloc the - string table, based on the size it read, as a form of sanity check - for botched byte swapping, on the theory that a byte swapped string - table size would be so totally bogus that the malloc would fail. Now - that we put in on the psymbol_obstack, we can't do this since gdb gets - a fatal error (out of virtual memory) if the size is bogus. We can - however at least check to see if the size is zero or some negative - value. */ - - DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stringsect); - - if (DBX_SYMCOUNT (objfile) == 0 - || DBX_STRINGTAB_SIZE (objfile) == 0) - return; - - if (DBX_STRINGTAB_SIZE (objfile) <= 0 - || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) - error ("ridiculous string table size (%d bytes).", - DBX_STRINGTAB_SIZE (objfile)); - - DBX_STRINGTAB (objfile) = - (char *) obstack_alloc (&objfile -> psymbol_obstack, - DBX_STRINGTAB_SIZE (objfile)); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); - if (val < 0) - perror_with_name (name); - val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, - sym_bfd); - if (val == 0) - error ("End of file reading string table"); - else if (val < 0) - /* It's possible bfd_read should be setting bfd_error, and we should be - checking that. But currently it doesn't set bfd_error. */ - perror_with_name (name); - else if (val != DBX_STRINGTAB_SIZE (objfile)) - error ("Short read reading string table"); -} - -/* PA specific parsing routine for section offsets. - - Plain and simple for now. */ - -static struct section_offsets * -pa_symfile_offsets (objfile, addr) - struct objfile *objfile; - CORE_ADDR addr; -{ - struct section_offsets *section_offsets; - int i; - - objfile->num_sections = SECT_OFF_MAX; - section_offsets = (struct section_offsets *) - obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct section_offsets) - + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); - - for (i = 0; i < SECT_OFF_MAX; i++) - ANOFFSET (section_offsets, i) = addr; - - return section_offsets; -} - -/* Register that we are able to handle SOM object file formats. */ - -static struct sym_fns pa_sym_fns = -{ - bfd_target_som_flavour, - pa_new_init, /* sym_new_init: init anything gbl to entire symtab */ - pa_symfile_init, /* sym_init: read initial info, setup for sym_read() */ - pa_symfile_read, /* sym_read: read a symbol file into symtab */ - pa_symfile_finish, /* sym_finish: finished with file, cleanup */ - pa_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ - NULL /* next: pointer to next struct sym_fns */ -}; - -void -_initialize_paread () -{ - add_symtab_fns (&pa_sym_fns); -} |