diff options
Diffstat (limited to 'gdb/dbxread.c')
| -rw-r--r-- | gdb/dbxread.c | 3539 |
1 files changed, 0 insertions, 3539 deletions
diff --git a/gdb/dbxread.c b/gdb/dbxread.c deleted file mode 100644 index e9c2a854afb..00000000000 --- a/gdb/dbxread.c +++ /dev/null @@ -1,3539 +0,0 @@ -/* Read dbx symbol tables and convert to internal format, for GDB. - Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, - 1996, 1997, 1998, 1999, 2000, 2001, 2002 - Free Software Foundation, Inc. - - 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. */ - -/* This module provides three functions: dbx_symfile_init, - which initializes to read a symbol file; dbx_new_init, which - discards existing cached information when all symbols are being - discarded; and dbx_symfile_read, which reads a symbol table - from a file. - - dbx_symfile_read 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. dbx_psymtab_to_symtab() is the function that does this */ - -#include "defs.h" -#include "gdb_string.h" - -#if defined(USG) || defined(__CYGNUSCLIB__) -#include <sys/types.h> -#include <fcntl.h> -#endif - -#include "obstack.h" -#include "gdb_stat.h" -#include "symtab.h" -#include "breakpoint.h" -#include "target.h" -#include "gdbcore.h" /* for bfd stuff */ -#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ -#include "symfile.h" -#include "objfiles.h" -#include "buildsym.h" -#include "stabsread.h" -#include "gdb-stabs.h" -#include "demangle.h" -#include "language.h" /* Needed for local_hex_string */ -#include "complaints.h" -#include "cp-abi.h" - -#include "aout/aout64.h" -#include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ - - -/* This macro returns the size field of a minimal symbol, which is normally - stored in the "info" field. The macro can be overridden for specific - targets (e.g. MIPS16) that use the info field for other purposes. */ -#ifndef MSYMBOL_SIZE -#define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym)) -#endif - - -/* We put a pointer to this structure in the read_symtab_private field - of the psymtab. */ - -struct symloc - { - /* The start (inclusive) and end (exclusive) addresses for this - partial symtab's text. STABS doesn't reliably give us nice - start and end addresses for each function. Instead, we are - told the addresses of various boundary points, and we have to - gather those together to build ranges. These are our running - best guess as to the range of text addresses for this psymtab. */ - CORE_ADDR textlow, texthigh; - - /* Offset within the file symbol table of first local symbol for this - file. */ - - int ldsymoff; - - /* Length (in bytes) of the section of the symbol table devoted to - this file's symbols (actually, the section bracketed may contain - more than just this file's symbols). If ldsymlen is 0, the only - reason for this thing's existence is the dependency list. Nothing - else will happen when it is read in. */ - - int ldsymlen; - - /* The size of each symbol in the symbol file (in external form). */ - - int symbol_size; - - /* Further information needed to locate the symbols if they are in - an ELF file. */ - - int symbol_offset; - int string_offset; - int file_string_offset; - }; - -#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) -#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) -#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) -#define TEXTLOW(p) (SYMLOC(p)->textlow) -#define TEXTHIGH(p) (SYMLOC(p)->texthigh) -#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) -#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) -#define STRING_OFFSET(p) (SYMLOC(p)->string_offset) -#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) - - -/* Remember what we deduced to be the source language of this psymtab. */ - -static enum language psymtab_language = language_unknown; - -/* The BFD for this file -- implicit parameter to next_symbol_text. */ - -static bfd *symfile_bfd; - -/* The size of each symbol in the symbol file (in external form). - This is set by dbx_symfile_read when building psymtabs, and by - dbx_psymtab_to_symtab when building symtabs. */ - -static unsigned symbol_size; - -/* This is the offset of the symbol table in the executable file. */ - -static unsigned symbol_table_offset; - -/* This is the offset of the string table in the executable file. */ - -static unsigned string_table_offset; - -/* For elf+stab executables, the n_strx field is not a simple index - into the string table. Instead, each .o file has a base offset in - the string table, and the associated symbols contain offsets from - this base. The following two variables contain the base offset for - the current and next .o files. */ - -static unsigned int file_string_table_offset; -static unsigned int next_file_string_table_offset; - -/* .o and NLM files contain unrelocated addresses which are based at - 0. When non-zero, this flag disables some of the special cases for - Solaris elf+stab text addresses at location 0. */ - -static int symfile_relocatable = 0; - -/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are - relative to the function start address. */ - -static int block_address_function_relative = 0; - -/* The lowest text address we have yet encountered. This is needed - because in an a.out file, there is no header field which tells us - what address the program is actually going to be loaded at, so we - need to make guesses based on the symbols (which *are* relocated to - reflect the address it will be loaded at). */ - -static CORE_ADDR lowest_text_address; - -/* Non-zero if there is any line number info in the objfile. Prevents - end_psymtab from discarding an otherwise empty psymtab. */ - -static int has_line_numbers; - -/* Complaints about the symbols we have encountered. */ - -struct complaint lbrac_complaint = -{"bad block start address patched", 0, 0}; - -struct complaint string_table_offset_complaint = -{"bad string table offset in symbol %d", 0, 0}; - -struct complaint unknown_symtype_complaint = -{"unknown symbol type %s", 0, 0}; - -struct complaint unknown_symchar_complaint = -{"unknown symbol descriptor `%c'", 0, 0}; - -struct complaint lbrac_rbrac_complaint = -{"block start larger than block end", 0, 0}; - -struct complaint lbrac_unmatched_complaint = -{"unmatched N_LBRAC before symtab pos %d", 0, 0}; - -struct complaint lbrac_mismatch_complaint = -{"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0}; - -struct complaint repeated_header_complaint = -{"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0}; - -struct complaint unclaimed_bincl_complaint = -{"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0}; - -/* find_text_range --- find start and end of loadable code sections - - The find_text_range function finds the shortest address range that - encloses all sections containing executable code, and stores it in - objfile's text_addr and text_size members. - - dbx_symfile_read will use this to finish off the partial symbol - table, in some cases. */ - -static void -find_text_range (bfd * sym_bfd, struct objfile *objfile) -{ - asection *sec; - int found_any = 0; - CORE_ADDR start = 0; - CORE_ADDR end = 0; - - for (sec = sym_bfd->sections; sec; sec = sec->next) - if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE) - { - CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec); - CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec); - - if (found_any) - { - if (sec_start < start) - start = sec_start; - if (sec_end > end) - end = sec_end; - } - else - { - start = sec_start; - end = sec_end; - } - - found_any = 1; - } - - if (!found_any) - error ("Can't find any code sections in symbol file"); - - DBX_TEXT_ADDR (objfile) = start; - DBX_TEXT_SIZE (objfile) = end - start; -} - - - -/* During initial symbol readin, we need to have a structure to keep - track of which psymtabs have which bincls in them. This structure - is used during readin to setup the list of dependencies within each - partial symbol table. */ - -struct header_file_location -{ - char *name; /* Name of header file */ - int instance; /* See above */ - struct partial_symtab *pst; /* Partial symtab that has the - BINCL/EINCL defs for this file */ -}; - -/* The actual list and controling variables */ -static struct header_file_location *bincl_list, *next_bincl; -static int bincls_allocated; - -/* Local function prototypes */ - -extern void _initialize_dbxread (void); - -static void process_now (struct objfile *); - -static void read_ofile_symtab (struct partial_symtab *); - -static void dbx_psymtab_to_symtab (struct partial_symtab *); - -static void dbx_psymtab_to_symtab_1 (struct partial_symtab *); - -static void read_dbx_dynamic_symtab (struct objfile *objfile); - -static void read_dbx_symtab (struct objfile *); - -static void free_bincl_list (struct objfile *); - -static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int); - -static void add_bincl_to_list (struct partial_symtab *, char *, int); - -static void init_bincl_list (int, struct objfile *); - -static char *dbx_next_symbol_text (struct objfile *); - -static void fill_symbuf (bfd *); - -static void dbx_symfile_init (struct objfile *); - -static void dbx_new_init (struct objfile *); - -static void dbx_symfile_read (struct objfile *, int); - -static void dbx_symfile_finish (struct objfile *); - -static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *); - -static void add_new_header_file (char *, int); - -static void add_old_header_file (char *, int); - -static void add_this_object_header_file (int); - -static struct partial_symtab *start_psymtab (struct objfile *, char *, - CORE_ADDR, int, - struct partial_symbol **, - struct partial_symbol **); - -/* Free up old header file tables */ - -void -free_header_files (void) -{ - if (this_object_header_files) - { - xfree (this_object_header_files); - this_object_header_files = NULL; - } - n_allocated_this_object_header_files = 0; -} - -/* Allocate new header file tables */ - -void -init_header_files (void) -{ - n_allocated_this_object_header_files = 10; - this_object_header_files = (int *) xmalloc (10 * sizeof (int)); -} - -/* Add header file number I for this object file - at the next successive FILENUM. */ - -static void -add_this_object_header_file (int i) -{ - if (n_this_object_header_files == n_allocated_this_object_header_files) - { - n_allocated_this_object_header_files *= 2; - this_object_header_files - = (int *) xrealloc ((char *) this_object_header_files, - n_allocated_this_object_header_files * sizeof (int)); - } - - this_object_header_files[n_this_object_header_files++] = i; -} - -/* Add to this file an "old" header file, one already seen in - a previous object file. NAME is the header file's name. - INSTANCE is its instance code, to select among multiple - symbol tables for the same header file. */ - -static void -add_old_header_file (char *name, int instance) -{ - register struct header_file *p = HEADER_FILES (current_objfile); - register int i; - - for (i = 0; i < N_HEADER_FILES (current_objfile); i++) - if (STREQ (p[i].name, name) && instance == p[i].instance) - { - add_this_object_header_file (i); - return; - } - complain (&repeated_header_complaint, name, symnum); -} - -/* Add to this file a "new" header file: definitions for its types follow. - NAME is the header file's name. - Most often this happens only once for each distinct header file, - but not necessarily. If it happens more than once, INSTANCE has - a different value each time, and references to the header file - use INSTANCE values to select among them. - - dbx output contains "begin" and "end" markers for each new header file, - but at this level we just need to know which files there have been; - so we record the file when its "begin" is seen and ignore the "end". */ - -static void -add_new_header_file (char *name, int instance) -{ - register int i; - register struct header_file *hfile; - - /* Make sure there is room for one more header file. */ - - i = N_ALLOCATED_HEADER_FILES (current_objfile); - - if (N_HEADER_FILES (current_objfile) == i) - { - if (i == 0) - { - N_ALLOCATED_HEADER_FILES (current_objfile) = 10; - HEADER_FILES (current_objfile) = (struct header_file *) - xmalloc (10 * sizeof (struct header_file)); - } - else - { - i *= 2; - N_ALLOCATED_HEADER_FILES (current_objfile) = i; - HEADER_FILES (current_objfile) = (struct header_file *) - xrealloc ((char *) HEADER_FILES (current_objfile), - (i * sizeof (struct header_file))); - } - } - - /* Create an entry for this header file. */ - - i = N_HEADER_FILES (current_objfile)++; - hfile = HEADER_FILES (current_objfile) + i; - hfile->name = savestring (name, strlen (name)); - hfile->instance = instance; - hfile->length = 10; - hfile->vector - = (struct type **) xmalloc (10 * sizeof (struct type *)); - memset (hfile->vector, 0, 10 * sizeof (struct type *)); - - add_this_object_header_file (i); -} - -#if 0 -static struct type ** -explicit_lookup_type (int real_filenum, int index) -{ - register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum]; - - if (index >= f->length) - { - f->length *= 2; - f->vector = (struct type **) - xrealloc (f->vector, f->length * sizeof (struct type *)); - memset (&f->vector[f->length / 2], - '\0', f->length * sizeof (struct type *) / 2); - } - return &f->vector[index]; -} -#endif - -static void -record_minimal_symbol (char *name, CORE_ADDR address, int type, - struct objfile *objfile) -{ - enum minimal_symbol_type ms_type; - int section; - asection *bfd_section; - - switch (type) - { - case N_TEXT | N_EXT: - ms_type = mst_text; - section = SECT_OFF_TEXT (objfile); - bfd_section = DBX_TEXT_SECTION (objfile); - break; - case N_DATA | N_EXT: - ms_type = mst_data; - section = SECT_OFF_DATA (objfile); - bfd_section = DBX_DATA_SECTION (objfile); - break; - case N_BSS | N_EXT: - ms_type = mst_bss; - section = SECT_OFF_BSS (objfile); - bfd_section = DBX_BSS_SECTION (objfile); - break; - case N_ABS | N_EXT: - ms_type = mst_abs; - section = -1; - bfd_section = NULL; - break; -#ifdef N_SETV - case N_SETV | N_EXT: - ms_type = mst_data; - section = SECT_OFF_DATA (objfile); - bfd_section = DBX_DATA_SECTION (objfile); - break; - case N_SETV: - /* I don't think this type actually exists; since a N_SETV is the result - of going over many .o files, it doesn't make sense to have one - file local. */ - ms_type = mst_file_data; - section = SECT_OFF_DATA (objfile); - bfd_section = DBX_DATA_SECTION (objfile); - break; -#endif - case N_TEXT: - case N_NBTEXT: - case N_FN: - case N_FN_SEQ: - ms_type = mst_file_text; - section = SECT_OFF_TEXT (objfile); - bfd_section = DBX_TEXT_SECTION (objfile); - break; - case N_DATA: - ms_type = mst_file_data; - - /* Check for __DYNAMIC, which is used by Sun shared libraries. - Record it as global even if it's local, not global, so - lookup_minimal_symbol can find it. We don't check symbol_leading_char - because for SunOS4 it always is '_'. */ - if (name[8] == 'C' && STREQ ("__DYNAMIC", name)) - ms_type = mst_data; - - /* Same with virtual function tables, both global and static. */ - { - char *tempstring = name; - if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) - ++tempstring; - if (is_vtable_name (tempstring)) - ms_type = mst_data; - } - section = SECT_OFF_DATA (objfile); - bfd_section = DBX_DATA_SECTION (objfile); - break; - case N_BSS: - ms_type = mst_file_bss; - section = SECT_OFF_BSS (objfile); - bfd_section = DBX_BSS_SECTION (objfile); - break; - default: - ms_type = mst_unknown; - section = -1; - bfd_section = NULL; - break; - } - - if ((ms_type == mst_file_text || ms_type == mst_text) - && address < lowest_text_address) - lowest_text_address = address; - - prim_record_minimal_symbol_and_info - (name, address, ms_type, NULL, section, bfd_section, objfile); -} - -/* Scan and build partial symbols for a symbol file. - We have been initialized by a call to dbx_symfile_init, which - put all the relevant info into a "struct dbx_symfile_info", - hung off the objfile structure. - - MAINLINE is true if we are reading the main symbol - table (as opposed to a shared lib or dynamically loaded file). */ - -static void -dbx_symfile_read (struct objfile *objfile, int mainline) -{ - bfd *sym_bfd; - int val; - struct cleanup *back_to; - - sym_bfd = objfile->obfd; - - /* .o and .nlm files are relocatables with text, data and bss segs based at - 0. This flag disables special (Solaris stabs-in-elf only) fixups for - symbols with a value of 0. */ - - symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC; - - /* This is true for Solaris (and all other systems which put stabs - in sections, hopefully, since it would be silly to do things - differently from Solaris), and false for SunOS4 and other a.out - file formats. */ - block_address_function_relative = - ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3)) - || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3)) - || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4)) - || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2)) - || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7)) - || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3))); - - val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); - if (val < 0) - perror_with_name (objfile->name); - - /* If we are reinitializing, or if we have never loaded syms yet, init */ - if (mainline - || (objfile->global_psymbols.size == 0 - && objfile->static_psymbols.size == 0)) - init_psymbol_list (objfile, DBX_SYMCOUNT (objfile)); - - symbol_size = DBX_SYMBOL_SIZE (objfile); - symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); - - free_pending_blocks (); - back_to = make_cleanup (really_free_pendings, 0); - - init_minimal_symbol_collection (); - make_cleanup_discard_minimal_symbols (); - - /* Read stabs data from executable file and define symbols. */ - - read_dbx_symtab (objfile); - - /* Add the dynamic symbols. */ - - read_dbx_dynamic_symtab (objfile); - - /* Take the text ranges the STABS partial symbol scanner computed - for each of the psymtabs and convert it into the canonical form - for psymtabs. */ - { - struct partial_symtab *p; - - ALL_OBJFILE_PSYMTABS (objfile, p) - { - p->textlow = TEXTLOW (p); - p->texthigh = TEXTHIGH (p); - } - } - - /* Install any minimal symbols that have been collected as the current - minimal symbols for this objfile. */ - - install_minimal_symbols (objfile); - - 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). */ - -static void -dbx_new_init (struct objfile *ignore) -{ - stabsread_new_init (); - buildsym_new_init (); - init_header_files (); -} - - -/* dbx_symfile_init () - is the dbx-specific initialization routine for reading symbols. - It is passed a struct objfile 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 fill with goodies. - - We read the string table into malloc'd space and stash a pointer to it. - - Since BFD doesn't know how to read debug symbols in a format-independent - way (and may never do so...), we have to do it ourselves. We will never - be called unless this is an a.out (or very similar) file. - FIXME, there should be a cleaner peephole into the BFD environment here. */ - -#define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */ - -static void -dbx_symfile_init (struct objfile *objfile) -{ - int val; - bfd *sym_bfd = objfile->obfd; - char *name = bfd_get_filename (sym_bfd); - asection *text_sect; - unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE]; - - /* Allocate struct to keep track of the symfile */ - objfile->sym_stab_info = (struct dbx_symfile_info *) - xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); - memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); - - DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); - DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data"); - DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss"); - - /* FIXME POKING INSIDE BFD DATA STRUCTURES */ -#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) -#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) - - /* FIXME POKING INSIDE BFD DATA STRUCTURES */ - - DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; - - text_sect = bfd_get_section_by_name (sym_bfd, ".text"); - if (!text_sect) - error ("Can't find .text section in symbol file"); - DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); - DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); - - DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd); - DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); - 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 less than the size of - the size field itself, or larger than the size of the entire file. - Note that all valid string tables have a size greater than zero, since - the bytes used to hold the size are included in the count. */ - - if (STRING_TABLE_OFFSET == 0) - { - /* It appears that with the existing bfd code, STRING_TABLE_OFFSET - will never be zero, even when there is no string table. This - would appear to be a bug in bfd. */ - DBX_STRINGTAB_SIZE (objfile) = 0; - DBX_STRINGTAB (objfile) = NULL; - } - else - { - val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); - if (val < 0) - perror_with_name (name); - - memset ((PTR) size_temp, 0, sizeof (size_temp)); - val = bfd_bread ((PTR) size_temp, sizeof (size_temp), sym_bfd); - if (val < 0) - { - perror_with_name (name); - } - else if (val == 0) - { - /* With the existing bfd code, STRING_TABLE_OFFSET will be set to - EOF if there is no string table, and attempting to read the size - from EOF will read zero bytes. */ - DBX_STRINGTAB_SIZE (objfile) = 0; - DBX_STRINGTAB (objfile) = NULL; - } - else - { - /* Read some data that would appear to be the string table size. - If there really is a string table, then it is probably the right - size. Byteswap if necessary and validate the size. Note that - the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some - random data that happened to be at STRING_TABLE_OFFSET, because - bfd can't tell us there is no string table, the sanity checks may - or may not catch this. */ - DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); - - if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp) - || 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)); - OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile)); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); - if (val < 0) - perror_with_name (name); - val = bfd_bread (DBX_STRINGTAB (objfile), - DBX_STRINGTAB_SIZE (objfile), - sym_bfd); - if (val != DBX_STRINGTAB_SIZE (objfile)) - perror_with_name (name); - } - } -} - -/* 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 -dbx_symfile_finish (struct objfile *objfile) -{ - if (objfile->sym_stab_info != NULL) - { - if (HEADER_FILES (objfile) != NULL) - { - register int i = N_HEADER_FILES (objfile); - register struct header_file *hfiles = HEADER_FILES (objfile); - - while (--i >= 0) - { - xfree (hfiles[i].name); - xfree (hfiles[i].vector); - } - xfree (hfiles); - } - xmfree (objfile->md, objfile->sym_stab_info); - } - free_header_files (); -} - - -/* Buffer for reading the symbol table entries. */ -static struct external_nlist symbuf[4096]; -static int symbuf_idx; -static int symbuf_end; - -/* cont_elem is used for continuing information in cfront. - It saves information about which types need to be fixed up and - completed after all the stabs are read. */ -struct cont_elem - { - /* sym and stabstring for continuing information in cfront */ - struct symbol *sym; - char *stabs; - /* state dependencies (statics that must be preserved) */ - int sym_idx; - int sym_end; - int symnum; - int (*func) (struct objfile *, struct symbol *, char *); - /* other state dependencies include: - (assumption is that these will not change since process_now FIXME!!) - stringtab_global - n_stabs - objfile - symfile_bfd */ - }; - -static struct cont_elem *cont_list = 0; -static int cont_limit = 0; -static int cont_count = 0; - -/* Arrange for function F to be called with arguments SYM and P later - in the stabs reading process. */ -void -process_later (struct symbol *sym, char *p, - int (*f) (struct objfile *, struct symbol *, char *)) -{ - - /* Allocate more space for the deferred list. */ - if (cont_count >= cont_limit - 1) - { - cont_limit += 32; /* chunk size */ - - cont_list - = (struct cont_elem *) xrealloc (cont_list, - (cont_limit - * sizeof (struct cont_elem))); - if (!cont_list) - error ("Virtual memory exhausted\n"); - } - - /* Save state variables so we can process these stabs later. */ - cont_list[cont_count].sym_idx = symbuf_idx; - cont_list[cont_count].sym_end = symbuf_end; - cont_list[cont_count].symnum = symnum; - cont_list[cont_count].sym = sym; - cont_list[cont_count].stabs = p; - cont_list[cont_count].func = f; - cont_count++; -} - -/* Call deferred funtions in CONT_LIST. */ - -static void -process_now (struct objfile *objfile) -{ - int i; - int save_symbuf_idx; - int save_symbuf_end; - int save_symnum; - struct symbol *sym; - char *stabs; - int err; - int (*func) (struct objfile *, struct symbol *, char *); - - /* Save the state of our caller, we'll want to restore it before - returning. */ - save_symbuf_idx = symbuf_idx; - save_symbuf_end = symbuf_end; - save_symnum = symnum; - - /* Iterate over all the deferred stabs. */ - for (i = 0; i < cont_count; i++) - { - /* Restore the state for this deferred stab. */ - symbuf_idx = cont_list[i].sym_idx; - symbuf_end = cont_list[i].sym_end; - symnum = cont_list[i].symnum; - sym = cont_list[i].sym; - stabs = cont_list[i].stabs; - func = cont_list[i].func; - - /* Call the function to handle this deferrd stab. */ - err = (*func) (objfile, sym, stabs); - if (err) - error ("Internal error: unable to resolve stab.\n"); - } - - /* Restore our caller's state. */ - symbuf_idx = save_symbuf_idx; - symbuf_end = save_symbuf_end; - symnum = save_symnum; - cont_count = 0; -} - - -/* Name of last function encountered. Used in Solaris to approximate - object file boundaries. */ -static char *last_function_name; - -/* The address in memory of the string table of the object file we are - reading (which might not be the "main" object file, but might be a - shared library or some other dynamically loaded thing). This is - set by read_dbx_symtab when building psymtabs, and by - read_ofile_symtab when building symtabs, and is used only by - next_symbol_text. FIXME: If that is true, we don't need it when - building psymtabs, right? */ -static char *stringtab_global; - -/* These variables are used to control fill_symbuf when the stabs - symbols are not contiguous (as may be the case when a COFF file is - linked using --split-by-reloc). */ -static struct stab_section_list *symbuf_sections; -static unsigned int symbuf_left; -static unsigned int symbuf_read; - -/* Refill the symbol table input buffer - and set the variables that control fetching entries from it. - Reports an error if no data available. - This function can read past the end of the symbol table - (into the string table) but this does no harm. */ - -static void -fill_symbuf (bfd *sym_bfd) -{ - unsigned int count; - int nbytes; - - if (symbuf_sections == NULL) - count = sizeof (symbuf); - else - { - if (symbuf_left <= 0) - { - file_ptr filepos = symbuf_sections->section->filepos; - if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0) - perror_with_name (bfd_get_filename (sym_bfd)); - symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section); - symbol_table_offset = filepos - symbuf_read; - symbuf_sections = symbuf_sections->next; - } - - count = symbuf_left; - if (count > sizeof (symbuf)) - count = sizeof (symbuf); - } - - nbytes = bfd_bread ((PTR) symbuf, count, sym_bfd); - if (nbytes < 0) - perror_with_name (bfd_get_filename (sym_bfd)); - else if (nbytes == 0) - error ("Premature end of file reading symbol table"); - symbuf_end = nbytes / symbol_size; - symbuf_idx = 0; - symbuf_left -= nbytes; - symbuf_read += nbytes; -} - -#define INTERNALIZE_SYMBOL(intern, extern, abfd) \ - { \ - (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \ - (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \ - (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \ - if (bfd_get_sign_extend_vma (abfd)) \ - (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \ - else \ - (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \ - } - -/* Invariant: The symbol pointed to by symbuf_idx is the first one - that hasn't been swapped. Swap the symbol at the same time - that symbuf_idx is incremented. */ - -/* dbx allows the text of a symbol name to be continued into the - next symbol name! When such a continuation is encountered - (a \ at the end of the text of a name) - call this function to get the continuation. */ - -static char * -dbx_next_symbol_text (struct objfile *objfile) -{ - struct internal_nlist nlist; - - if (symbuf_idx == symbuf_end) - fill_symbuf (symfile_bfd); - - symnum++; - INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd); - OBJSTAT (objfile, n_stabs++); - - symbuf_idx++; - - return nlist.n_strx + stringtab_global + file_string_table_offset; -} - -/* Initialize the list of bincls to contain none and have some - allocated. */ - -static void -init_bincl_list (int number, struct objfile *objfile) -{ - bincls_allocated = number; - next_bincl = bincl_list = (struct header_file_location *) - xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location)); -} - -/* Add a bincl to the list. */ - -static void -add_bincl_to_list (struct partial_symtab *pst, char *name, int instance) -{ - if (next_bincl >= bincl_list + bincls_allocated) - { - int offset = next_bincl - bincl_list; - bincls_allocated *= 2; - bincl_list = (struct header_file_location *) - xmrealloc (pst->objfile->md, (char *) bincl_list, - bincls_allocated * sizeof (struct header_file_location)); - next_bincl = bincl_list + offset; - } - next_bincl->pst = pst; - next_bincl->instance = instance; - next_bincl++->name = name; -} - -/* Given a name, value pair, find the corresponding - bincl in the list. Return the partial symtab associated - with that header_file_location. */ - -static struct partial_symtab * -find_corresponding_bincl_psymtab (char *name, int instance) -{ - struct header_file_location *bincl; - - for (bincl = bincl_list; bincl < next_bincl; bincl++) - if (bincl->instance == instance - && STREQ (name, bincl->name)) - return bincl->pst; - - complain (&repeated_header_complaint, name, symnum); - return (struct partial_symtab *) 0; -} - -/* Free the storage allocated for the bincl list. */ - -static void -free_bincl_list (struct objfile *objfile) -{ - xmfree (objfile->md, (PTR) bincl_list); - bincls_allocated = 0; -} - -static void -do_free_bincl_list_cleanup (void *objfile) -{ - free_bincl_list (objfile); -} - -static struct cleanup * -make_cleanup_free_bincl_list (struct objfile *objfile) -{ - return make_cleanup (do_free_bincl_list_cleanup, objfile); -} - -/* Set namestring based on nlist. If the string table index is invalid, - give a fake name, and print a single error message per symbol file read, - rather than abort the symbol reading or flood the user with messages. */ - -static char * -set_namestring (struct objfile *objfile, struct internal_nlist nlist) -{ - char *namestring; - - if (((unsigned) nlist.n_strx + file_string_table_offset) >= - DBX_STRINGTAB_SIZE (objfile)) - { - complain (&string_table_offset_complaint, symnum); - namestring = "<bad string table offset>"; - } - else - namestring = nlist.n_strx + file_string_table_offset + - DBX_STRINGTAB (objfile); - return namestring; -} - -/* Scan a SunOs dynamic symbol table for symbols of interest and - add them to the minimal symbol table. */ - -static void -read_dbx_dynamic_symtab (struct objfile *objfile) -{ - bfd *abfd = objfile->obfd; - struct cleanup *back_to; - int counter; - long dynsym_size; - long dynsym_count; - asymbol **dynsyms; - asymbol **symptr; - arelent **relptr; - long dynrel_size; - long dynrel_count; - arelent **dynrels; - CORE_ADDR sym_value; - char *name; - - /* Check that the symbol file has dynamic symbols that we know about. - bfd_arch_unknown can happen if we are reading a sun3 symbol file - on a sun4 host (and vice versa) and bfd is not configured - --with-target=all. This would trigger an assertion in bfd/sunos.c, - so we ignore the dynamic symbols in this case. */ - if (bfd_get_flavour (abfd) != bfd_target_aout_flavour - || (bfd_get_file_flags (abfd) & DYNAMIC) == 0 - || bfd_get_arch (abfd) == bfd_arch_unknown) - return; - - dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd); - if (dynsym_size < 0) - return; - - dynsyms = (asymbol **) xmalloc (dynsym_size); - back_to = make_cleanup (xfree, dynsyms); - - dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms); - if (dynsym_count < 0) - { - do_cleanups (back_to); - return; - } - - /* Enter dynamic symbols into the minimal symbol table - if this is a stripped executable. */ - if (bfd_get_symcount (abfd) <= 0) - { - symptr = dynsyms; - for (counter = 0; counter < dynsym_count; counter++, symptr++) - { - asymbol *sym = *symptr; - asection *sec; - int type; - - sec = bfd_get_section (sym); - - /* BFD symbols are section relative. */ - sym_value = sym->value + sec->vma; - - if (bfd_get_section_flags (abfd, sec) & SEC_CODE) - { - sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - type = N_TEXT; - } - else if (bfd_get_section_flags (abfd, sec) & SEC_DATA) - { - sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - type = N_DATA; - } - else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) - { - sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); - type = N_BSS; - } - else - continue; - - if (sym->flags & BSF_GLOBAL) - type |= N_EXT; - - record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value, - type, objfile); - } - } - - /* Symbols from shared libraries have a dynamic relocation entry - that points to the associated slot in the procedure linkage table. - We make a mininal symbol table entry with type mst_solib_trampoline - at the address in the procedure linkage table. */ - dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd); - if (dynrel_size < 0) - { - do_cleanups (back_to); - return; - } - - dynrels = (arelent **) xmalloc (dynrel_size); - make_cleanup (xfree, dynrels); - - dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms); - if (dynrel_count < 0) - { - do_cleanups (back_to); - return; - } - - for (counter = 0, relptr = dynrels; - counter < dynrel_count; - counter++, relptr++) - { - arelent *rel = *relptr; - CORE_ADDR address = - rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - - switch (bfd_get_arch (abfd)) - { - case bfd_arch_sparc: - if (rel->howto->type != RELOC_JMP_SLOT) - continue; - break; - case bfd_arch_m68k: - /* `16' is the type BFD produces for a jump table relocation. */ - if (rel->howto->type != 16) - continue; - - /* Adjust address in the jump table to point to - the start of the bsr instruction. */ - address -= 2; - break; - default: - continue; - } - - name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr); - prim_record_minimal_symbol (name, address, mst_solib_trampoline, - objfile); - } - - do_cleanups (back_to); -} - -/* Setup partial_symtab's describing each source file for which - debugging information is available. */ - -static void -read_dbx_symtab (struct objfile *objfile) -{ - register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */ - struct internal_nlist nlist; - CORE_ADDR text_addr; - int text_size; - - register char *namestring; - int nsl; - int past_first_source_file = 0; - CORE_ADDR last_o_file_start = 0; - CORE_ADDR last_function_start = 0; - struct cleanup *back_to; - bfd *abfd; - int textlow_not_set; - - /* Current partial symtab */ - struct partial_symtab *pst; - - /* List of current psymtab's include files */ - char **psymtab_include_list; - int includes_allocated; - int includes_used; - - /* Index within current psymtab dependency list */ - struct partial_symtab **dependency_list; - int dependencies_used, dependencies_allocated; - - text_addr = DBX_TEXT_ADDR (objfile); - text_size = DBX_TEXT_SIZE (objfile); - - /* FIXME. We probably want to change stringtab_global rather than add this - while processing every symbol entry. FIXME. */ - file_string_table_offset = 0; - next_file_string_table_offset = 0; - - stringtab_global = DBX_STRINGTAB (objfile); - - pst = (struct partial_symtab *) 0; - - includes_allocated = 30; - includes_used = 0; - psymtab_include_list = (char **) alloca (includes_allocated * - sizeof (char *)); - - dependencies_allocated = 30; - dependencies_used = 0; - dependency_list = - (struct partial_symtab **) alloca (dependencies_allocated * - sizeof (struct partial_symtab *)); - - /* Init bincl list */ - init_bincl_list (20, objfile); - back_to = make_cleanup_free_bincl_list (objfile); - - last_source_file = NULL; - - lowest_text_address = (CORE_ADDR) -1; - - symfile_bfd = objfile->obfd; /* For next_text_symbol */ - abfd = objfile->obfd; - symbuf_end = symbuf_idx = 0; - next_symbol_text_func = dbx_next_symbol_text; - textlow_not_set = 1; - has_line_numbers = 0; - - for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) - { - /* Get the symbol for this run and pull out some info */ - QUIT; /* allow this to be interruptable */ - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - bufp = &symbuf[symbuf_idx++]; - - /* - * Special case to speed up readin. - */ - if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE) - { - has_line_numbers = 1; - continue; - } - - INTERNALIZE_SYMBOL (nlist, bufp, abfd); - OBJSTAT (objfile, n_stabs++); - - /* Ok. There is a lot of code duplicated in the rest of this - switch statement (for efficiency reasons). Since I don't - like duplicating code, I will do my penance here, and - describe the code which is duplicated: - - *) The assignment to namestring. - *) The call to strchr. - *) The addition of a partial symbol the the two partial - symbol lists. This last is a large section of code, so - I've imbedded it in the following macro. - */ - - switch (nlist.n_type) - { - static struct complaint function_outside_compilation_unit = { - "function `%s' appears to be defined outside of all compilation units", 0, 0 - }; - char *p; - /* - * Standard, external, non-debugger, symbols - */ - - case N_TEXT | N_EXT: - case N_NBTEXT | N_EXT: - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - goto record_it; - - case N_DATA | N_EXT: - case N_NBDATA | N_EXT: - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - goto record_it; - - case N_BSS: - case N_BSS | N_EXT: - case N_NBBSS | N_EXT: - case N_SETV | N_EXT: /* FIXME, is this in BSS? */ - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile)); - goto record_it; - - case N_ABS | N_EXT: - record_it: - namestring = set_namestring (objfile, nlist); - - bss_ext_symbol: - record_minimal_symbol (namestring, nlist.n_value, - nlist.n_type, objfile); /* Always */ - continue; - - /* Standard, local, non-debugger, symbols */ - - case N_NBTEXT: - - /* We need to be able to deal with both N_FN or N_TEXT, - because we have no way of knowing whether the sys-supplied ld - or GNU ld was used to make the executable. Sequents throw - in another wrinkle -- they renumbered N_FN. */ - - case N_FN: - case N_FN_SEQ: - case N_TEXT: - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - namestring = set_namestring (objfile, nlist); - - if ((namestring[0] == '-' && namestring[1] == 'l') - || (namestring[(nsl = strlen (namestring)) - 1] == 'o' - && namestring[nsl - 2] == '.')) - { - if (objfile->ei.entry_point < nlist.n_value && - objfile->ei.entry_point >= last_o_file_start) - { - objfile->ei.entry_file_lowpc = last_o_file_start; - objfile->ei.entry_file_highpc = nlist.n_value; - } - if (past_first_source_file && pst - /* The gould NP1 uses low values for .o and -l symbols - which are not the address. */ - && nlist.n_value >= TEXTLOW (pst)) - { - end_psymtab (pst, psymtab_include_list, includes_used, - symnum * symbol_size, - nlist.n_value > TEXTHIGH (pst) - ? nlist.n_value : TEXTHIGH (pst), - dependency_list, dependencies_used, textlow_not_set); - pst = (struct partial_symtab *) 0; - includes_used = 0; - dependencies_used = 0; - } - else - past_first_source_file = 1; - last_o_file_start = nlist.n_value; - } - else - goto record_it; - continue; - - case N_DATA: - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - goto record_it; - - case N_UNDF | N_EXT: - if (nlist.n_value != 0) - { - /* This is a "Fortran COMMON" symbol. See if the target - environment knows where it has been relocated to. */ - - CORE_ADDR reladdr; - - namestring = set_namestring (objfile, nlist); - if (target_lookup_symbol (namestring, &reladdr)) - { - continue; /* Error in lookup; ignore symbol for now. */ - } - nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */ - nlist.n_value = reladdr; - goto bss_ext_symbol; - } - continue; /* Just undefined, not COMMON */ - - case N_UNDF: - if (processing_acc_compilation && nlist.n_strx == 1) - { - /* Deal with relative offsets in the string table - used in ELF+STAB under Solaris. If we want to use the - n_strx field, which contains the name of the file, - we must adjust file_string_table_offset *before* calling - set_namestring(). */ - past_first_source_file = 1; - file_string_table_offset = next_file_string_table_offset; - next_file_string_table_offset = - file_string_table_offset + nlist.n_value; - if (next_file_string_table_offset < file_string_table_offset) - error ("string table offset backs up at %d", symnum); - /* FIXME -- replace error() with complaint. */ - continue; - } - continue; - - /* Lots of symbol types we can just ignore. */ - - case N_ABS: - case N_NBDATA: - case N_NBBSS: - continue; - - /* Keep going . . . */ - - /* - * Special symbol types for GNU - */ - case N_INDR: - case N_INDR | N_EXT: - case N_SETA: - case N_SETA | N_EXT: - case N_SETT: - case N_SETT | N_EXT: - case N_SETD: - case N_SETD | N_EXT: - case N_SETB: - case N_SETB | N_EXT: - case N_SETV: - continue; - - /* - * Debugger symbols - */ - - case N_SO: - { - CORE_ADDR valu; - static int prev_so_symnum = -10; - static int first_so_symnum; - char *p; - int prev_textlow_not_set; - - valu = nlist.n_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - - prev_textlow_not_set = textlow_not_set; - -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* A zero value is probably an indication for the SunPRO 3.0 - compiler. end_psymtab explicitly tests for zero, so - don't relocate it. */ - - if (nlist.n_value == 0) - { - textlow_not_set = 1; - valu = 0; - } - else - textlow_not_set = 0; -#else - textlow_not_set = 0; -#endif - past_first_source_file = 1; - - if (prev_so_symnum != symnum - 1) - { /* Here if prev stab wasn't N_SO */ - first_so_symnum = symnum; - - if (pst) - { - end_psymtab (pst, psymtab_include_list, includes_used, - symnum * symbol_size, - valu > TEXTHIGH (pst) ? valu : TEXTHIGH (pst), - dependency_list, dependencies_used, - prev_textlow_not_set); - pst = (struct partial_symtab *) 0; - includes_used = 0; - dependencies_used = 0; - } - } - - prev_so_symnum = symnum; - - /* End the current partial symtab and start a new one */ - - namestring = set_namestring (objfile, nlist); - - /* Null name means end of .o file. Don't start a new one. */ - if (*namestring == '\000') - continue; - - /* Some compilers (including gcc) emit a pair of initial N_SOs. - The first one is a directory name; the second the file name. - If pst exists, is empty, and has a filename ending in '/', - we assume the previous N_SO was a directory name. */ - - p = strrchr (namestring, '/'); - if (p && *(p + 1) == '\000') - continue; /* Simply ignore directory name SOs */ - - /* Some other compilers (C++ ones in particular) emit useless - SOs for non-existant .c files. We ignore all subsequent SOs that - immediately follow the first. */ - - if (!pst) - pst = start_psymtab (objfile, - namestring, valu, - first_so_symnum * symbol_size, - objfile->global_psymbols.next, - objfile->static_psymbols.next); - continue; - } - - case N_BINCL: - { - enum language tmp_language; - /* Add this bincl to the bincl_list for future EXCLs. No - need to save the string; it'll be around until - read_dbx_symtab function returns */ - - namestring = set_namestring (objfile, nlist); - tmp_language = deduce_language_from_filename (namestring); - - /* Only change the psymtab's language if we've learned - something useful (eg. tmp_language is not language_unknown). - In addition, to match what start_subfile does, never change - from C++ to C. */ - if (tmp_language != language_unknown - && (tmp_language != language_c - || psymtab_language != language_cplus)) - psymtab_language = tmp_language; - - if (pst == NULL) - { - /* FIXME: we should not get here without a PST to work on. - Attempt to recover. */ - complain (&unclaimed_bincl_complaint, namestring, symnum); - continue; - } - add_bincl_to_list (pst, namestring, nlist.n_value); - - /* Mark down an include file in the current psymtab */ - - goto record_include_file; - } - - case N_SOL: - { - enum language tmp_language; - /* Mark down an include file in the current psymtab */ - - namestring = set_namestring (objfile, nlist); - tmp_language = deduce_language_from_filename (namestring); - - /* Only change the psymtab's language if we've learned - something useful (eg. tmp_language is not language_unknown). - In addition, to match what start_subfile does, never change - from C++ to C. */ - if (tmp_language != language_unknown - && (tmp_language != language_c - || psymtab_language != language_cplus)) - psymtab_language = tmp_language; - - /* In C++, one may expect the same filename to come round many - times, when code is coming alternately from the main file - and from inline functions in other files. So I check to see - if this is a file we've seen before -- either the main - source file, or a previously included file. - - This seems to be a lot of time to be spending on N_SOL, but - things like "break c-exp.y:435" need to work (I - suppose the psymtab_include_list could be hashed or put - in a binary tree, if profiling shows this is a major hog). */ - if (pst && STREQ (namestring, pst->filename)) - continue; - { - register int i; - for (i = 0; i < includes_used; i++) - if (STREQ (namestring, psymtab_include_list[i])) - { - i = -1; - break; - } - if (i == -1) - continue; - } - - record_include_file: - - psymtab_include_list[includes_used++] = namestring; - if (includes_used >= includes_allocated) - { - char **orig = psymtab_include_list; - - psymtab_include_list = (char **) - alloca ((includes_allocated *= 2) * - sizeof (char *)); - memcpy ((PTR) psymtab_include_list, (PTR) orig, - includes_used * sizeof (char *)); - } - continue; - } - case N_LSYM: /* Typedef or automatic variable. */ - case N_STSYM: /* Data seg var -- static */ - case N_LCSYM: /* BSS " */ - case N_ROSYM: /* Read-only data seg var -- static. */ - case N_NBSTS: /* Gould nobase. */ - case N_NBLCS: /* symbols. */ - case N_FUN: - case N_GSYM: /* Global (extern) variable; can be - data or bss (sigh FIXME). */ - - /* Following may probably be ignored; I'll leave them here - for now (until I do Pascal and Modula 2 extensions). */ - - case N_PC: /* I may or may not need this; I - suspect not. */ - case N_M2C: /* I suspect that I can ignore this here. */ - case N_SCOPE: /* Same. */ - - namestring = set_namestring (objfile, nlist); - - /* See if this is an end of function stab. */ - if (pst && nlist.n_type == N_FUN && *namestring == '\000') - { - CORE_ADDR valu; - - /* It's value is the size (in bytes) of the function for - function relative stabs, or the address of the function's - end for old style stabs. */ - valu = nlist.n_value + last_function_start; - if (TEXTHIGH (pst) == 0 || valu > TEXTHIGH (pst)) - TEXTHIGH (pst) = valu; - break; - } - - p = (char *) strchr (namestring, ':'); - if (!p) - continue; /* Not a debugging symbol. */ - - - - /* Main processing section for debugging symbols which - the initial read through the symbol tables needs to worry - about. If we reach this point, the symbol which we are - considering is definitely one we are interested in. - p must also contain the (valid) index into the namestring - which indicates the debugging type symbol. */ - - switch (p[1]) - { - case 'S': - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); -#ifdef STATIC_TRANSFORM_NAME - namestring = STATIC_TRANSFORM_NAME (namestring); -#endif - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_STATIC, - &objfile->static_psymbols, - 0, nlist.n_value, - psymtab_language, objfile); - continue; - case 'G': - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); - /* The addresses in these entries are reported to be - wrong. See the code that reads 'G's for symtabs. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_STATIC, - &objfile->global_psymbols, - 0, nlist.n_value, - psymtab_language, objfile); - continue; - - case 'T': - /* When a 'T' entry is defining an anonymous enum, it - may have a name which is the empty string, or a - single space. Since they're not really defining a - symbol, those shouldn't go in the partial symbol - table. We do pick up the elements of such enums at - 'check_enum:', below. */ - if (p >= namestring + 2 - || (p == namestring + 1 - && namestring[0] != ' ')) - { - add_psymbol_to_list (namestring, p - namestring, - STRUCT_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - nlist.n_value, 0, - psymtab_language, objfile); - if (p[2] == 't') - { - /* Also a typedef with the same name. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - nlist.n_value, 0, - psymtab_language, objfile); - p += 1; - } - /* The semantics of C++ state that "struct foo { ... }" - also defines a typedef for "foo". Unfortuantely, cfront - never makes the typedef when translating from C++ to C. - We make the typedef here so that "ptype foo" works as - expected for cfront translated code. */ - else if (psymtab_language == language_cplus) - { - /* Also a typedef with the same name. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - nlist.n_value, 0, - psymtab_language, objfile); - } - } - goto check_enum; - case 't': - if (p != namestring) /* a name is there, not just :T... */ - { - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_TYPEDEF, - &objfile->static_psymbols, - nlist.n_value, 0, - psymtab_language, objfile); - } - check_enum: - /* If this is an enumerated type, we need to - add all the enum constants to the partial symbol - table. This does not cover enums without names, e.g. - "enum {a, b} c;" in C, but fortunately those are - rare. There is no way for GDB to find those from the - enum type without spending too much time on it. Thus - to solve this problem, the compiler needs to put out the - enum in a nameless type. GCC2 does this. */ - - /* We are looking for something of the form - <name> ":" ("t" | "T") [<number> "="] "e" - {<constant> ":" <value> ","} ";". */ - - /* Skip over the colon and the 't' or 'T'. */ - p += 2; - /* This type may be given a number. Also, numbers can come - in pairs like (0,26). Skip over it. */ - while ((*p >= '0' && *p <= '9') - || *p == '(' || *p == ',' || *p == ')' - || *p == '=') - p++; - - if (*p++ == 'e') - { - /* The aix4 compiler emits extra crud before the members. */ - if (*p == '-') - { - /* Skip over the type (?). */ - while (*p != ':') - p++; - - /* Skip over the colon. */ - p++; - } - - /* We have found an enumerated type. */ - /* According to comments in read_enum_type - a comma could end it instead of a semicolon. - I don't know where that happens. - Accept either. */ - while (*p && *p != ';' && *p != ',') - { - char *q; - - /* Check for and handle cretinous dbx symbol name - continuation! */ - if (*p == '\\' || (*p == '?' && p[1] == '\0')) - p = next_symbol_text (objfile); - - /* Point to the character after the name - of the enum constant. */ - for (q = p; *q && *q != ':'; q++) - ; - /* Note that the value doesn't matter for - enum constants in psymtabs, just in symtabs. */ - add_psymbol_to_list (p, q - p, - VAR_NAMESPACE, LOC_CONST, - &objfile->static_psymbols, 0, - 0, psymtab_language, objfile); - /* Point past the name. */ - p = q; - /* Skip over the value. */ - while (*p && *p != ',') - p++; - /* Advance past the comma. */ - if (*p) - p++; - } - } - continue; - case 'c': - /* Constant, e.g. from "const" in Pascal. */ - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_CONST, - &objfile->static_psymbols, nlist.n_value, - 0, psymtab_language, objfile); - continue; - - case 'f': - if (! pst) - { - int name_len = p - namestring; - char *name = xmalloc (name_len + 1); - memcpy (name, namestring, name_len); - name[name_len] = '\0'; - complain (&function_outside_compilation_unit, name); - xfree (name); - } - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - /* Kludges for ELF/STABS with Sun ACC */ - last_function_name = namestring; -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit - value for the bottom of the text seg in those cases. */ - if (nlist.n_value == ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile))) - { - CORE_ADDR minsym_valu = - find_stab_function_addr (namestring, pst->filename, objfile); - /* find_stab_function_addr will return 0 if the minimal - symbol wasn't found. (Unfortunately, this might also - be a valid address.) Anyway, if it *does* return 0, - it is likely that the value was set correctly to begin - with... */ - if (minsym_valu != 0) - nlist.n_value = minsym_valu; - } - if (pst && textlow_not_set) - { - TEXTLOW (pst) = nlist.n_value; - textlow_not_set = 0; - } -#endif - /* End kludge. */ - - /* Keep track of the start of the last function so we - can handle end of function symbols. */ - last_function_start = nlist.n_value; - - /* In reordered executables this function may lie outside - the bounds created by N_SO symbols. If that's the case - use the address of this function as the low bound for - the partial symbol table. */ - if (pst - && (textlow_not_set - || (nlist.n_value < TEXTLOW (pst) - && (nlist.n_value - != ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile)))))) - { - TEXTLOW (pst) = nlist.n_value; - textlow_not_set = 0; - } - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_BLOCK, - &objfile->static_psymbols, - 0, nlist.n_value, - psymtab_language, objfile); - continue; - - /* Global functions were ignored here, but now they - are put into the global psymtab like one would expect. - They're also in the minimal symbol table. */ - case 'F': - if (! pst) - { - int name_len = p - namestring; - char *name = xmalloc (name_len + 1); - memcpy (name, namestring, name_len); - name[name_len] = '\0'; - complain (&function_outside_compilation_unit, name); - xfree (name); - } - nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); - /* Kludges for ELF/STABS with Sun ACC */ - last_function_name = namestring; -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit - value for the bottom of the text seg in those cases. */ - if (nlist.n_value == ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile))) - { - CORE_ADDR minsym_valu = - find_stab_function_addr (namestring, pst->filename, objfile); - /* find_stab_function_addr will return 0 if the minimal - symbol wasn't found. (Unfortunately, this might also - be a valid address.) Anyway, if it *does* return 0, - it is likely that the value was set correctly to begin - with... */ - if (minsym_valu != 0) - nlist.n_value = minsym_valu; - } - if (pst && textlow_not_set) - { - TEXTLOW (pst) = nlist.n_value; - textlow_not_set = 0; - } -#endif - /* End kludge. */ - - /* Keep track of the start of the last function so we - can handle end of function symbols. */ - last_function_start = nlist.n_value; - - /* In reordered executables this function may lie outside - the bounds created by N_SO symbols. If that's the case - use the address of this function as the low bound for - the partial symbol table. */ - if (pst - && (textlow_not_set - || (nlist.n_value < TEXTLOW (pst) - && (nlist.n_value - != ANOFFSET (objfile->section_offsets, - SECT_OFF_TEXT (objfile)))))) - { - TEXTLOW (pst) = nlist.n_value; - textlow_not_set = 0; - } - add_psymbol_to_list (namestring, p - namestring, - VAR_NAMESPACE, LOC_BLOCK, - &objfile->global_psymbols, - 0, nlist.n_value, - psymtab_language, objfile); - continue; - - /* Two things show up here (hopefully); static symbols of - local scope (static used inside braces) or extensions - of structure symbols. We can ignore both. */ - case 'V': - case '(': - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - case '-': - case '#': /* for symbol identification (used in live ranges) */ - /* added to support cfront stabs strings */ - case 'Z': /* for definition continuations */ - case 'P': /* for prototypes */ - continue; - - case ':': - /* It is a C++ nested symbol. We don't need to record it - (I don't think); if we try to look up foo::bar::baz, - then symbols for the symtab containing foo should get - read in, I think. */ - /* Someone says sun cc puts out symbols like - /foo/baz/maclib::/usr/local/bin/maclib, - which would get here with a symbol type of ':'. */ - continue; - - default: - /* Unexpected symbol descriptor. The second and subsequent stabs - of a continued stab can show up here. The question is - whether they ever can mimic a normal stab--it would be - nice if not, since we certainly don't want to spend the - time searching to the end of every string looking for - a backslash. */ - - complain (&unknown_symchar_complaint, p[1]); - - /* Ignore it; perhaps it is an extension that we don't - know about. */ - continue; - } - - case N_EXCL: - - namestring = set_namestring (objfile, nlist); - - /* Find the corresponding bincl and mark that psymtab on the - psymtab dependency list */ - { - struct partial_symtab *needed_pst = - find_corresponding_bincl_psymtab (namestring, nlist.n_value); - - /* If this include file was defined earlier in this file, - leave it alone. */ - if (needed_pst == pst) - continue; - - if (needed_pst) - { - int i; - int found = 0; - - for (i = 0; i < dependencies_used; i++) - if (dependency_list[i] == needed_pst) - { - found = 1; - break; - } - - /* If it's already in the list, skip the rest. */ - if (found) - continue; - - dependency_list[dependencies_used++] = needed_pst; - if (dependencies_used >= dependencies_allocated) - { - struct partial_symtab **orig = dependency_list; - dependency_list = - (struct partial_symtab **) - alloca ((dependencies_allocated *= 2) - * sizeof (struct partial_symtab *)); - memcpy ((PTR) dependency_list, (PTR) orig, - (dependencies_used - * sizeof (struct partial_symtab *))); -#ifdef DEBUG_INFO - fprintf_unfiltered (gdb_stderr, "Had to reallocate dependency list.\n"); - fprintf_unfiltered (gdb_stderr, "New dependencies allocated: %d\n", - dependencies_allocated); -#endif - } - } - } - continue; - - case N_ENDM: -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* Solaris 2 end of module, finish current partial symbol table. - end_psymtab will set TEXTHIGH (pst) to the proper value, which - is necessary if a module compiled without debugging info - follows this module. */ - if (pst) - { - end_psymtab (pst, psymtab_include_list, includes_used, - symnum * symbol_size, - (CORE_ADDR) 0, - dependency_list, dependencies_used, textlow_not_set); - pst = (struct partial_symtab *) 0; - includes_used = 0; - dependencies_used = 0; - } -#endif - continue; - - case N_RBRAC: -#ifdef HANDLE_RBRAC - HANDLE_RBRAC (nlist.n_value); - continue; -#endif - case N_EINCL: - case N_DSLINE: - case N_BSLINE: - case N_SSYM: /* Claim: Structure or union element. - Hopefully, I can ignore this. */ - case N_ENTRY: /* Alternate entry point; can ignore. */ - case N_MAIN: /* Can definitely ignore this. */ - case N_CATCH: /* These are GNU C++ extensions */ - case N_EHDECL: /* that can safely be ignored here. */ - case N_LENG: - case N_BCOMM: - case N_ECOMM: - case N_ECOML: - case N_FNAME: - case N_SLINE: - case N_RSYM: - case N_PSYM: - case N_LBRAC: - case N_NSYMS: /* Ultrix 4.0: symbol count */ - case N_DEFD: /* GNU Modula-2 */ - case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ - - case N_OBJ: /* useless types from Solaris */ - case N_OPT: - /* These symbols aren't interesting; don't worry about them */ - - continue; - - default: - /* If we haven't found it yet, ignore it. It's probably some - new type we don't know about yet. */ - complain (&unknown_symtype_complaint, - local_hex_string (nlist.n_type)); - continue; - } - } - - /* If there's stuff to be cleaned up, clean it up. */ - if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */ - /*FIXME, does this have a bug at start address 0? */ - && last_o_file_start - && objfile->ei.entry_point < nlist.n_value - && objfile->ei.entry_point >= last_o_file_start) - { - objfile->ei.entry_file_lowpc = last_o_file_start; - objfile->ei.entry_file_highpc = nlist.n_value; - } - - if (pst) - { - /* Don't set pst->texthigh lower than it already is. */ - CORE_ADDR text_end = - (lowest_text_address == (CORE_ADDR) -1 - ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile))) - : lowest_text_address) - + text_size; - - end_psymtab (pst, psymtab_include_list, includes_used, - symnum * symbol_size, - text_end > TEXTHIGH (pst) ? text_end : TEXTHIGH (pst), - dependency_list, dependencies_used, textlow_not_set); - } - - do_cleanups (back_to); -} - -/* Allocate and partially fill a partial symtab. It will be - completely filled at the end of the symbol list. - - SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR - is the address relative to which its symbols are (incremental) or 0 - (normal). */ - - -static struct partial_symtab * -start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow, - int ldsymoff, struct partial_symbol **global_syms, - struct partial_symbol **static_syms) -{ - struct partial_symtab *result = - start_psymtab_common (objfile, objfile->section_offsets, - filename, textlow, global_syms, static_syms); - - result->read_symtab_private = (char *) - obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); - TEXTLOW (result) = result->textlow; - TEXTHIGH (result) = result->texthigh; - LDSYMOFF (result) = ldsymoff; - result->read_symtab = dbx_psymtab_to_symtab; - SYMBOL_SIZE (result) = symbol_size; - SYMBOL_OFFSET (result) = symbol_table_offset; - STRING_OFFSET (result) = string_table_offset; - FILE_STRING_OFFSET (result) = file_string_table_offset; - - /* If we're handling an ELF file, drag some section-relocation info - for this source file out of the ELF symbol table, to compensate for - Sun brain death. This replaces the section_offsets in this psymtab, - if successful. */ - elfstab_offset_sections (objfile, result); - - /* Deduce the source language from the filename for this psymtab. */ - psymtab_language = deduce_language_from_filename (filename); - - return result; -} - -/* Close off the current usage of PST. - Returns PST or NULL if the partial symtab was empty and thrown away. - - FIXME: List variables and peculiarities of same. */ - -struct partial_symtab * -end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes, - int capping_symbol_offset, CORE_ADDR capping_text, - struct partial_symtab **dependency_list, int number_dependencies, - int textlow_not_set) -{ - int i; - struct objfile *objfile = pst->objfile; - - if (capping_symbol_offset != -1) - LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst); - TEXTHIGH (pst) = capping_text; - -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* Under Solaris, the N_SO symbols always have a value of 0, - instead of the usual address of the .o file. Therefore, - we have to do some tricks to fill in texthigh and textlow. - The first trick is: if we see a static - or global function, and the textlow for the current pst - is not set (ie: textlow_not_set), then we use that function's - address for the textlow of the pst. */ - - /* Now, to fill in texthigh, we remember the last function seen - in the .o file. Also, there's a hack in - bfd/elf.c and gdb/elfread.c to pass the ELF st_size field - to here via the misc_info field. Therefore, we can fill in - a reliable texthigh by taking the address plus size of the - last function in the file. */ - - if (TEXTHIGH (pst) == 0 && last_function_name) - { - char *p; - int n; - struct minimal_symbol *minsym; - - p = strchr (last_function_name, ':'); - if (p == NULL) - p = last_function_name; - n = p - last_function_name; - p = alloca (n + 2); - strncpy (p, last_function_name, n); - p[n] = 0; - - minsym = lookup_minimal_symbol (p, pst->filename, objfile); - if (minsym == NULL) - { - /* Sun Fortran appends an underscore to the minimal symbol name, - try again with an appended underscore if the minimal symbol - was not found. */ - p[n] = '_'; - p[n + 1] = 0; - minsym = lookup_minimal_symbol (p, pst->filename, objfile); - } - - if (minsym) - TEXTHIGH (pst) = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym); - - last_function_name = NULL; - } - - /* this test will be true if the last .o file is only data */ - if (textlow_not_set) - TEXTLOW (pst) = TEXTHIGH (pst); - else - { - struct partial_symtab *p1; - - /* If we know our own starting text address, then walk through all other - psymtabs for this objfile, and if any didn't know their ending text - address, set it to our starting address. Take care to not set our - own ending address to our starting address, nor to set addresses on - `dependency' files that have both textlow and texthigh zero. */ - - ALL_OBJFILE_PSYMTABS (objfile, p1) - { - if (TEXTHIGH (p1) == 0 && TEXTLOW (p1) != 0 && p1 != pst) - { - TEXTHIGH (p1) = TEXTLOW (pst); - /* if this file has only data, then make textlow match texthigh */ - if (TEXTLOW (p1) == 0) - TEXTLOW (p1) = TEXTHIGH (p1); - } - } - } - - /* End of kludge for patching Solaris textlow and texthigh. */ -#endif /* SOFUN_ADDRESS_MAYBE_MISSING. */ - - pst->n_global_syms = - objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); - pst->n_static_syms = - objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); - - pst->number_of_dependencies = number_dependencies; - if (number_dependencies) - { - pst->dependencies = (struct partial_symtab **) - obstack_alloc (&objfile->psymbol_obstack, - number_dependencies * sizeof (struct partial_symtab *)); - memcpy (pst->dependencies, dependency_list, - number_dependencies * sizeof (struct partial_symtab *)); - } - else - pst->dependencies = 0; - - for (i = 0; i < num_includes; i++) - { - struct partial_symtab *subpst = - allocate_psymtab (include_list[i], objfile); - - /* Copy the sesction_offsets array from the main psymtab. */ - subpst->section_offsets = pst->section_offsets; - subpst->read_symtab_private = - (char *) obstack_alloc (&objfile->psymbol_obstack, - sizeof (struct symloc)); - LDSYMOFF (subpst) = - LDSYMLEN (subpst) = - TEXTLOW (subpst) = - TEXTHIGH (subpst) = 0; - - /* We could save slight bits of space by only making one of these, - shared by the entire set of include files. FIXME-someday. */ - subpst->dependencies = (struct partial_symtab **) - obstack_alloc (&objfile->psymbol_obstack, - sizeof (struct partial_symtab *)); - subpst->dependencies[0] = pst; - subpst->number_of_dependencies = 1; - - subpst->globals_offset = - subpst->n_global_syms = - subpst->statics_offset = - subpst->n_static_syms = 0; - - subpst->readin = 0; - subpst->symtab = 0; - subpst->read_symtab = pst->read_symtab; - } - - sort_pst_symbols (pst); - - /* If there is already a psymtab or symtab for a file of this name, remove it. - (If there is a symtab, more drastic things also happen.) - This happens in VxWorks. */ - free_named_symtabs (pst->filename); - - if (num_includes == 0 - && number_dependencies == 0 - && pst->n_global_syms == 0 - && pst->n_static_syms == 0 - && has_line_numbers == 0) - { - /* Throw away this psymtab, it's empty. We can't deallocate it, since - it is on the obstack, but we can forget to chain it on the list. */ - /* Empty psymtabs happen as a result of header files which don't have - any symbols in them. There can be a lot of them. But this check - is wrong, in that a psymtab with N_SLINE entries but nothing else - is not empty, but we don't realize that. Fixing that without slowing - things down might be tricky. */ - - discard_psymtab (pst); - - /* Indicate that psymtab was thrown away. */ - pst = (struct partial_symtab *) NULL; - } - return pst; -} - -static void -dbx_psymtab_to_symtab_1 (struct partial_symtab *pst) -{ - struct cleanup *old_chain; - int i; - - if (!pst) - return; - - if (pst->readin) - { - fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", - pst->filename); - return; - } - - /* Read in all partial symtabs on which this one is dependent */ - for (i = 0; i < pst->number_of_dependencies; i++) - if (!pst->dependencies[i]->readin) - { - /* Inform about additional files that need to be read in. */ - if (info_verbose) - { - fputs_filtered (" ", gdb_stdout); - wrap_here (""); - fputs_filtered ("and ", gdb_stdout); - wrap_here (""); - printf_filtered ("%s...", pst->dependencies[i]->filename); - wrap_here (""); /* Flush output */ - gdb_flush (gdb_stdout); - } - dbx_psymtab_to_symtab_1 (pst->dependencies[i]); - } - - if (LDSYMLEN (pst)) /* Otherwise it's a dummy */ - { - /* Init stuff necessary for reading in symbols */ - stabsread_init (); - buildsym_init (); - old_chain = make_cleanup (really_free_pendings, 0); - file_string_table_offset = FILE_STRING_OFFSET (pst); - symbol_size = SYMBOL_SIZE (pst); - - /* Read in this file's symbols */ - bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET); - read_ofile_symtab (pst); - sort_symtab_syms (pst->symtab); - - do_cleanups (old_chain); - } - - pst->readin = 1; -} - -/* Read in all of the symbols for a given psymtab for real. - Be verbose about it if the user wants that. */ - -static void -dbx_psymtab_to_symtab (struct partial_symtab *pst) -{ - bfd *sym_bfd; - - if (!pst) - return; - - if (pst->readin) - { - fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", - pst->filename); - return; - } - - if (LDSYMLEN (pst) || pst->number_of_dependencies) - { - /* Print the message now, before reading the string table, - to avoid disconcerting pauses. */ - if (info_verbose) - { - printf_filtered ("Reading in symbols for %s...", pst->filename); - gdb_flush (gdb_stdout); - } - - sym_bfd = pst->objfile->obfd; - - next_symbol_text_func = dbx_next_symbol_text; - - dbx_psymtab_to_symtab_1 (pst); - - /* Match with global symbols. This only needs to be done once, - after all of the symtabs and dependencies have been read in. */ - scan_file_globals (pst->objfile); - - /* Finish up the debug error message. */ - if (info_verbose) - printf_filtered ("done.\n"); - } -} - -/* Read in a defined section of a specific object file's symbols. */ - -static void -read_ofile_symtab (struct partial_symtab *pst) -{ - register char *namestring; - register struct external_nlist *bufp; - struct internal_nlist nlist; - unsigned char type; - unsigned max_symnum; - register bfd *abfd; - struct objfile *objfile; - int sym_offset; /* Offset to start of symbols to read */ - int sym_size; /* Size of symbols to read */ - CORE_ADDR text_offset; /* Start of text segment for symbols */ - int text_size; /* Size of text segment for symbols */ - struct section_offsets *section_offsets; - - objfile = pst->objfile; - sym_offset = LDSYMOFF (pst); - sym_size = LDSYMLEN (pst); - text_offset = TEXTLOW (pst); - text_size = TEXTHIGH (pst) - TEXTLOW (pst); - /* This cannot be simply objfile->section_offsets because of - elfstab_offset_sections() which initializes the psymtab section - offsets information in a special way, and that is different from - objfile->section_offsets. */ - section_offsets = pst->section_offsets; - - current_objfile = objfile; - subfile_stack = NULL; - - stringtab_global = DBX_STRINGTAB (objfile); - last_source_file = NULL; - - abfd = objfile->obfd; - symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ - symbuf_end = symbuf_idx = 0; - - /* It is necessary to actually read one symbol *before* the start - of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL - occurs before the N_SO symbol. - - Detecting this in read_dbx_symtab - would slow down initial readin, so we look for it here instead. */ - if (!processing_acc_compilation && sym_offset >= (int) symbol_size) - { - bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR); - fill_symbuf (abfd); - bufp = &symbuf[symbuf_idx++]; - INTERNALIZE_SYMBOL (nlist, bufp, abfd); - OBJSTAT (objfile, n_stabs++); - - namestring = set_namestring (objfile, nlist); - - processing_gcc_compilation = 0; - if (nlist.n_type == N_TEXT) - { - const char *tempstring = namestring; - - if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) - processing_gcc_compilation = 1; - else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) - processing_gcc_compilation = 2; - if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd)) - ++tempstring; - if (STREQN (tempstring, "__gnu_compiled", 14)) - processing_gcc_compilation = 2; - } - - /* Try to select a C++ demangling based on the compilation unit - producer. */ - -#if 0 - /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't - know whether it will use the old style or v3 mangling. */ - if (processing_gcc_compilation) - { - if (AUTO_DEMANGLING) - { - set_demangling_style (GNU_DEMANGLING_STYLE_STRING); - } - } -#endif - } - else - { - /* The N_SO starting this symtab is the first symbol, so we - better not check the symbol before it. I'm not this can - happen, but it doesn't hurt to check for it. */ - bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); - processing_gcc_compilation = 0; - } - - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - bufp = &symbuf[symbuf_idx]; - if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO) - error ("First symbol in segment of executable not a source symbol"); - - max_symnum = sym_size / symbol_size; - - for (symnum = 0; - symnum < max_symnum; - symnum++) - { - QUIT; /* Allow this to be interruptable */ - if (symbuf_idx == symbuf_end) - fill_symbuf (abfd); - bufp = &symbuf[symbuf_idx++]; - INTERNALIZE_SYMBOL (nlist, bufp, abfd); - OBJSTAT (objfile, n_stabs++); - - type = bfd_h_get_8 (abfd, bufp->e_type); - - namestring = set_namestring (objfile, nlist); - - if (type & N_STAB) - { - process_one_symbol (type, nlist.n_desc, nlist.n_value, - namestring, section_offsets, objfile); - } - /* We skip checking for a new .o or -l file; that should never - happen in this routine. */ - else if (type == N_TEXT) - { - /* I don't think this code will ever be executed, because - the GCC_COMPILED_FLAG_SYMBOL usually is right before - the N_SO symbol which starts this source file. - However, there is no reason not to accept - the GCC_COMPILED_FLAG_SYMBOL anywhere. */ - - if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) - processing_gcc_compilation = 1; - else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) - processing_gcc_compilation = 2; - -#if 0 - /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't - know whether it will use the old style or v3 mangling. */ - if (AUTO_DEMANGLING) - { - set_demangling_style (GNU_DEMANGLING_STYLE_STRING); - } -#endif - } - else if (type & N_EXT || type == (unsigned char) N_TEXT - || type == (unsigned char) N_NBTEXT - ) - { - /* Global symbol: see if we came across a dbx defintion for - a corresponding symbol. If so, store the value. Remove - syms from the chain when their values are stored, but - search the whole chain, as there may be several syms from - different files with the same name. */ - /* This is probably not true. Since the files will be read - in one at a time, each reference to a global symbol will - be satisfied in each file as it appears. So we skip this - section. */ - ; - } - } - - current_objfile = NULL; - - /* In a Solaris elf file, this variable, which comes from the - value of the N_SO symbol, will still be 0. Luckily, text_offset, - which comes from TEXTLOW (pst) is correct. */ - if (last_source_start_addr == 0) - last_source_start_addr = text_offset; - - /* In reordered executables last_source_start_addr may not be the - lower bound for this symtab, instead use text_offset which comes - from TEXTLOW (pst) which is correct. */ - if (last_source_start_addr > text_offset) - last_source_start_addr = text_offset; - - pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile)); - - /* Process items which we had to "process_later" due to dependencies - on other stabs. */ - process_now (objfile); - - end_stabs (); -} - - -/* This handles a single symbol from the symbol-file, building symbols - into a GDB symtab. It takes these arguments and an implicit argument. - - TYPE is the type field of the ".stab" symbol entry. - DESC is the desc field of the ".stab" entry. - VALU is the value field of the ".stab" entry. - NAME is the symbol name, in our address space. - SECTION_OFFSETS is a set of amounts by which the sections of this object - file were relocated when it was loaded into memory. - Note that these section_offsets are not the - objfile->section_offsets but the pst->section_offsets. - All symbols that refer - to memory locations need to be offset by these amounts. - OBJFILE is the object file from which we are reading symbols. - It is used in end_symtab. */ - -void -process_one_symbol (int type, int desc, CORE_ADDR valu, char *name, - struct section_offsets *section_offsets, - struct objfile *objfile) -{ -#ifdef SUN_FIXED_LBRAC_BUG - /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need - to correct the address of N_LBRAC's. If it is not defined, then - we never need to correct the addresses. */ - - /* This records the last pc address we've seen. We depend on there being - an SLINE or FUN or SO before the first LBRAC, since the variable does - not get reset in between reads of different symbol files. */ - static CORE_ADDR last_pc_address; -#endif - - register struct context_stack *new; - /* This remembers the address of the start of a function. It is used - because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are - relative to the current function's start address. On systems - other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is - used to relocate these symbol types rather than SECTION_OFFSETS. */ - static CORE_ADDR function_start_offset; - - /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source - file. Used to detect the SunPRO solaris compiler. */ - static int n_opt_found; - - /* The stab type used for the definition of the last function. - N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ - static int function_stab_type = 0; - - if (!block_address_function_relative) - /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the - function start address, so just use the text offset. */ - function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - - /* Something is wrong if we see real data before - seeing a source file name. */ - - if (last_source_file == NULL && type != (unsigned char) N_SO) - { - /* Ignore any symbols which appear before an N_SO symbol. - Currently no one puts symbols there, but we should deal - gracefully with the case. A complain()t might be in order, - but this should not be an error (). */ - return; - } - - switch (type) - { - case N_FUN: - case N_FNAME: - - if (*name == '\000') - { - /* This N_FUN marks the end of a function. This closes off the - current block. */ - within_function = 0; - new = pop_context (); - - /* Make a block for the local symbols within. */ - finish_block (new->name, &local_symbols, new->old_blocks, - new->start_addr, new->start_addr + valu, - objfile); - - /* May be switching to an assembler file which may not be using - block relative stabs, so reset the offset. */ - if (block_address_function_relative) - function_start_offset = 0; - - break; - } - - /* Relocate for dynamic loading */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - valu = SMASH_TEXT_ADDRESS (valu); - goto define_a_symbol; - - case N_LBRAC: - /* This "symbol" just indicates the start of an inner lexical - context within a function. */ - - /* Ignore extra outermost context from SunPRO cc and acc. */ - if (n_opt_found && desc == 1) - break; - - if (block_address_function_relative) - /* Relocate for Sun ELF acc fn-relative syms. */ - valu += function_start_offset; - else - /* On most machines, the block addresses are relative to the - N_SO, the linker did not relocate them (sigh). */ - valu += last_source_start_addr; - -#ifdef SUN_FIXED_LBRAC_BUG - if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) - { - /* Patch current LBRAC pc value to match last handy pc value */ - complain (&lbrac_complaint); - valu = last_pc_address; - } -#endif - new = push_context (desc, valu); - break; - - case N_RBRAC: - /* This "symbol" just indicates the end of an inner lexical - context that was started with N_LBRAC. */ - - /* Ignore extra outermost context from SunPRO cc and acc. */ - if (n_opt_found && desc == 1) - break; - - if (block_address_function_relative) - /* Relocate for Sun ELF acc fn-relative syms. */ - valu += function_start_offset; - else - /* On most machines, the block addresses are relative to the - N_SO, the linker did not relocate them (sigh). */ - valu += last_source_start_addr; - - new = pop_context (); - if (desc != new->depth) - complain (&lbrac_mismatch_complaint, symnum); - - /* Some compilers put the variable decls inside of an - LBRAC/RBRAC block. This macro should be nonzero if this - is true. DESC is N_DESC from the N_RBRAC symbol. - GCC_P is true if we've detected the GCC_COMPILED_SYMBOL - or the GCC2_COMPILED_SYMBOL. */ -#if !defined (VARIABLES_INSIDE_BLOCK) -#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 -#endif - - /* Can only use new->locals as local symbols here if we're in - gcc or on a machine that puts them before the lbrack. */ - if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) - local_symbols = new->locals; - - if (context_stack_depth - > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) - { - /* This is not the outermost LBRAC...RBRAC pair in the function, - its local symbols preceded it, and are the ones just recovered - from the context stack. Define the block for them (but don't - bother if the block contains no symbols. Should we complain - on blocks without symbols? I can't think of any useful purpose - for them). */ - if (local_symbols != NULL) - { - /* Muzzle a compiler bug that makes end < start. (which - compilers? Is this ever harmful?). */ - if (new->start_addr > valu) - { - complain (&lbrac_rbrac_complaint); - new->start_addr = valu; - } - /* Make a block for the local symbols within. */ - finish_block (0, &local_symbols, new->old_blocks, - new->start_addr, valu, objfile); - } - } - else - { - /* This is the outermost LBRAC...RBRAC pair. There is no - need to do anything; leave the symbols that preceded it - to be attached to the function's own block. We need to - indicate that we just moved outside of the function. */ - within_function = 0; - } - - if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation)) - /* Now pop locals of block just finished. */ - local_symbols = new->locals; - break; - - case N_FN: - case N_FN_SEQ: - /* This kind of symbol indicates the start of an object file. */ - /* Relocate for dynamic loading */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - break; - - case N_SO: - /* This type of symbol indicates the start of data - for one source file. - Finish the symbol table of the previous source file - (if any) and start accumulating a new symbol table. */ - /* Relocate for dynamic loading */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - - n_opt_found = 0; - -#ifdef SUN_FIXED_LBRAC_BUG - last_pc_address = valu; /* Save for SunOS bug circumcision */ -#endif - -#ifdef PCC_SOL_BROKEN - /* pcc bug, occasionally puts out SO for SOL. */ - if (context_stack_depth > 0) - { - start_subfile (name, NULL); - break; - } -#endif - if (last_source_file) - { - /* Check if previous symbol was also an N_SO (with some - sanity checks). If so, that one was actually the directory - name, and the current one is the real file name. - Patch things up. */ - if (previous_stab_code == (unsigned char) N_SO) - { - patch_subfile_names (current_subfile, name); - break; /* Ignore repeated SOs */ - } - end_symtab (valu, objfile, SECT_OFF_TEXT (objfile)); - end_stabs (); - } - - /* Null name means this just marks the end of text for this .o file. - Don't start a new symtab in this case. */ - if (*name == '\000') - break; - - if (block_address_function_relative) - function_start_offset = 0; - - start_stabs (); - start_symtab (name, NULL, valu); - record_debugformat ("stabs"); - break; - - case N_SOL: - /* This type of symbol indicates the start of data for - a sub-source-file, one whose contents were copied or - included in the compilation of the main source file - (whose name was given in the N_SO symbol.) */ - /* Relocate for dynamic loading */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - start_subfile (name, current_subfile->dirname); - break; - - case N_BINCL: - push_subfile (); - add_new_header_file (name, valu); - start_subfile (name, current_subfile->dirname); - break; - - case N_EINCL: - start_subfile (pop_subfile (), current_subfile->dirname); - break; - - case N_EXCL: - add_old_header_file (name, valu); - break; - - case N_SLINE: - /* This type of "symbol" really just records - one line-number -- core-address correspondence. - Enter it in the line list for this symbol table. */ - - /* Relocate for dynamic loading and for ELF acc fn-relative syms. */ - valu += function_start_offset; - -#ifdef SUN_FIXED_LBRAC_BUG - last_pc_address = valu; /* Save for SunOS bug circumcision */ -#endif - record_line (current_subfile, desc, valu); - break; - - case N_BCOMM: - common_block_start (name, objfile); - break; - - case N_ECOMM: - common_block_end (objfile); - break; - - /* The following symbol types need to have the appropriate offset added - to their value; then we process symbol definitions in the name. */ - - case N_STSYM: /* Static symbol in data seg */ - case N_LCSYM: /* Static symbol in BSS seg */ - case N_ROSYM: /* Static symbol in Read-only data seg */ - /* HORRID HACK DEPT. However, it's Sun's furgin' fault. - Solaris2's stabs-in-elf makes *most* symbols relative - but leaves a few absolute (at least for Solaris 2.1 and version - 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence. - .stab "foo:S...",N_STSYM is absolute (ld relocates it) - .stab "foo:V...",N_STSYM is relative (section base subtracted). - This leaves us no choice but to search for the 'S' or 'V'... - (or pass the whole section_offsets stuff down ONE MORE function - call level, which we really don't want to do). */ - { - char *p; - - /* .o files and NLMs have non-zero text seg offsets, but don't need - their static syms offset in this fashion. XXX - This is really a - crock that should be fixed in the solib handling code so that I - don't have to work around it here. */ - - if (!symfile_relocatable) - { - p = strchr (name, ':'); - if (p != 0 && p[1] == 'S') - { - /* The linker relocated it. We don't want to add an - elfstab_offset_sections-type offset, but we *do* want - to add whatever solib.c passed to symbol_file_add as - addr (this is known to affect SunOS4, and I suspect ELF - too). Since elfstab_offset_sections currently does not - muck with the text offset (there is no Ttext.text - symbol), we can get addr from the text offset. If - elfstab_offset_sections ever starts dealing with the - text offset, and we still need to do this, we need to - invent a SECT_OFF_ADDR_KLUDGE or something. */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - goto define_a_symbol; - } - } - /* Since it's not the kludge case, re-dispatch to the right handler. */ - switch (type) - { - case N_STSYM: - goto case_N_STSYM; - case N_LCSYM: - goto case_N_LCSYM; - case N_ROSYM: - goto case_N_ROSYM; - default: - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - } - } - - case_N_STSYM: /* Static symbol in data seg */ - case N_DSLINE: /* Source line number, data seg */ - valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile)); - goto define_a_symbol; - - case_N_LCSYM: /* Static symbol in BSS seg */ - case N_BSLINE: /* Source line number, bss seg */ - /* N_BROWS: overlaps with N_BSLINE */ - valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile)); - goto define_a_symbol; - - case_N_ROSYM: /* Static symbol in Read-only data seg */ - valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile)); - goto define_a_symbol; - - case N_ENTRY: /* Alternate entry point */ - /* Relocate for dynamic loading */ - valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); - goto define_a_symbol; - - /* The following symbol types we don't know how to process. Handle - them in a "default" way, but complain to people who care. */ - default: - case N_CATCH: /* Exception handler catcher */ - case N_EHDECL: /* Exception handler name */ - case N_PC: /* Global symbol in Pascal */ - case N_M2C: /* Modula-2 compilation unit */ - /* N_MOD2: overlaps with N_EHDECL */ - case N_SCOPE: /* Modula-2 scope information */ - case N_ECOML: /* End common (local name) */ - case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ - case N_NBDATA: - case N_NBBSS: - case N_NBSTS: - case N_NBLCS: - complain (&unknown_symtype_complaint, local_hex_string (type)); - /* FALLTHROUGH */ - - /* The following symbol types don't need the address field relocated, - since it is either unused, or is absolute. */ - define_a_symbol: - case N_GSYM: /* Global variable */ - case N_NSYMS: /* Number of symbols (ultrix) */ - case N_NOMAP: /* No map? (ultrix) */ - case N_RSYM: /* Register variable */ - case N_DEFD: /* Modula-2 GNU module dependency */ - case N_SSYM: /* Struct or union element */ - case N_LSYM: /* Local symbol in stack */ - case N_PSYM: /* Parameter variable */ - case N_LENG: /* Length of preceding symbol type */ - if (name) - { - int deftype; - char *colon_pos = strchr (name, ':'); - if (colon_pos == NULL) - deftype = '\0'; - else - deftype = colon_pos[1]; - - switch (deftype) - { - case 'f': - case 'F': - function_stab_type = type; - -#ifdef SOFUN_ADDRESS_MAYBE_MISSING - /* Deal with the SunPRO 3.0 compiler which omits the address - from N_FUN symbols. */ - if (type == N_FUN - && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile))) - { - CORE_ADDR minsym_valu = - find_stab_function_addr (name, last_source_file, objfile); - - /* find_stab_function_addr will return 0 if the minimal - symbol wasn't found. (Unfortunately, this might also - be a valid address.) Anyway, if it *does* return 0, - it is likely that the value was set correctly to begin - with... */ - if (minsym_valu != 0) - valu = minsym_valu; - } -#endif - -#ifdef SUN_FIXED_LBRAC_BUG - /* The Sun acc compiler, under SunOS4, puts out - functions with N_GSYM or N_STSYM. The problem is - that the address of the symbol is no good (for N_GSYM - it doesn't even attept an address; for N_STSYM it - puts out an address but then it gets relocated - relative to the data segment, not the text segment). - Currently we can't fix this up later as we do for - some types of symbol in scan_file_globals. - Fortunately we do have a way of finding the address - - we know that the value in last_pc_address is either - the one we want (if we're dealing with the first - function in an object file), or somewhere in the - previous function. This means that we can use the - minimal symbol table to get the address. */ - - /* Starting with release 3.0, the Sun acc compiler, - under SunOS4, puts out functions with N_FUN and a value - of zero. This gets relocated to the start of the text - segment of the module, which is no good either. - Under SunOS4 we can deal with this as N_SLINE and N_SO - entries contain valid absolute addresses. - Release 3.0 acc also puts out N_OPT entries, which makes - it possible to discern acc from cc or gcc. */ - - if (type == N_GSYM || type == N_STSYM - || (type == N_FUN - && n_opt_found && !block_address_function_relative)) - { - struct minimal_symbol *m; - int l = colon_pos - name; - - m = lookup_minimal_symbol_by_pc (last_pc_address); - if (m && STREQN (SYMBOL_NAME (m), name, l) - && SYMBOL_NAME (m)[l] == '\0') - /* last_pc_address was in this function */ - valu = SYMBOL_VALUE (m); - else if (m && SYMBOL_NAME (m + 1) - && STREQN (SYMBOL_NAME (m + 1), name, l) - && SYMBOL_NAME (m + 1)[l] == '\0') - /* last_pc_address was in last function */ - valu = SYMBOL_VALUE (m + 1); - else - /* Not found - use last_pc_address (for finish_block) */ - valu = last_pc_address; - } - - last_pc_address = valu; /* Save for SunOS bug circumcision */ -#endif - - if (block_address_function_relative) - /* For Solaris 2.0 compilers, the block addresses and - N_SLINE's are relative to the start of the - function. On normal systems, and when using gcc on - Solaris 2.0, these addresses are just absolute, or - relative to the N_SO, depending on - BLOCK_ADDRESS_ABSOLUTE. */ - function_start_offset = valu; - - within_function = 1; - - if (context_stack_depth > 1) - { - complain (&lbrac_unmatched_complaint, symnum); - break; - } - - if (context_stack_depth > 0) - { - new = pop_context (); - /* Make a block for the local symbols within. */ - finish_block (new->name, &local_symbols, new->old_blocks, - new->start_addr, valu, objfile); - } - - new = push_context (0, valu); - new->name = define_symbol (valu, name, desc, type, objfile); - break; - - default: - define_symbol (valu, name, desc, type, objfile); - break; - } - } - break; - - /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it - for a bunch of other flags, too. Someday we may parse their - flags; for now we ignore theirs and hope they'll ignore ours. */ - case N_OPT: /* Solaris 2: Compiler options */ - if (name) - { - if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL)) - { - processing_gcc_compilation = 2; -#if 0 /* Works, but is experimental. -fnf */ - /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't - know whether it will use the old style or v3 mangling. */ - if (AUTO_DEMANGLING) - { - set_demangling_style (GNU_DEMANGLING_STYLE_STRING); - } -#endif - } - else - n_opt_found = 1; - } - break; - - case N_MAIN: /* Name of main routine. */ - /* FIXME: If one has a symbol file with N_MAIN and then replaces - it with a symbol file with "main" and without N_MAIN. I'm - not sure exactly what rule to follow but probably something - like: N_MAIN takes precedence over "main" no matter what - objfile it is in; If there is more than one N_MAIN, choose - the one in the symfile_objfile; If there is more than one - N_MAIN within a given objfile, complain() and choose - arbitrarily. (kingdon) */ - if (name != NULL) - set_main_name (name); - break; - - /* The following symbol types can be ignored. */ - case N_OBJ: /* Solaris 2: Object file dir and name */ - /* N_UNDF: Solaris 2: file separator mark */ - /* N_UNDF: -- we will never encounter it, since we only process one - file's symbols at once. */ - case N_ENDM: /* Solaris 2: End of module */ - case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ - break; - } - - /* '#' is a GNU C extension to allow one symbol to refer to another - related symbol. - - Generally this is used so that an alias can refer to its main - symbol. */ - if (name[0] == '#') - { - /* Initialize symbol reference names and determine if this is - a definition. If symbol reference is being defined, go - ahead and add it. Otherwise, just return sym. */ - - char *s = name; - int refnum; - - /* If this stab defines a new reference ID that is not on the - reference list, then put it on the reference list. - - We go ahead and advance NAME past the reference, even though - it is not strictly necessary at this time. */ - refnum = symbol_reference_defined (&s); - if (refnum >= 0) - if (!ref_search (refnum)) - ref_add (refnum, 0, name, valu); - name = s; - } - - - previous_stab_code = type; -} - -/* FIXME: The only difference between this and elfstab_build_psymtabs - is the call to install_minimal_symbols for elf, and the support for - split sections. If the differences are really that small, the code - should be shared. */ - -/* Scan and build partial symbols for an coff symbol file. - The coff file has already been processed to get its minimal symbols. - - This routine is the equivalent of dbx_symfile_init and dbx_symfile_read - rolled into one. - - OBJFILE is the object file we are reading symbols from. - ADDR is the address relative to which the symbols are (e.g. - the base address of the text segment). - MAINLINE is true if we are reading the main symbol - table (as opposed to a shared lib or dynamically loaded file). - TEXTADDR is the address of the text section. - TEXTSIZE is the size of the text section. - STABSECTS is the list of .stab sections in OBJFILE. - STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the - .stabstr section exists. - - This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, - adjusted for coff details. */ - -void -coffstab_build_psymtabs (struct objfile *objfile, int mainline, - CORE_ADDR textaddr, unsigned int textsize, - struct stab_section_list *stabsects, - file_ptr stabstroffset, unsigned int stabstrsize) -{ - int val; - bfd *sym_bfd = objfile->obfd; - char *name = bfd_get_filename (sym_bfd); - struct dbx_symfile_info *info; - unsigned int stabsize; - - /* There is already a dbx_symfile_info allocated by our caller. - It might even contain some info from the coff symtab to help us. */ - info = objfile->sym_stab_info; - - DBX_TEXT_ADDR (objfile) = textaddr; - DBX_TEXT_SIZE (objfile) = textsize; - -#define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ - DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE; - DBX_STRINGTAB_SIZE (objfile) = stabstrsize; - - if (stabstrsize > bfd_get_size (sym_bfd)) - error ("ridiculous string table size: %d bytes", stabstrsize); - DBX_STRINGTAB (objfile) = (char *) - obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1); - OBJSTAT (objfile, sz_strtab += stabstrsize + 1); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); - if (val < 0) - perror_with_name (name); - val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); - if (val != stabstrsize) - perror_with_name (name); - - stabsread_new_init (); - buildsym_new_init (); - free_header_files (); - init_header_files (); - - processing_acc_compilation = 1; - - /* In a coff file, we've already installed the minimal symbols that came - from the coff (non-stab) symbol table, so always act like an - incremental load here. */ - if (stabsects->next == NULL) - { - stabsize = bfd_section_size (sym_bfd, stabsects->section); - DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); - DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos; - } - else - { - struct stab_section_list *stabsect; - - DBX_SYMCOUNT (objfile) = 0; - for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next) - { - stabsize = bfd_section_size (sym_bfd, stabsect->section); - DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile); - } - - DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos; - - symbuf_sections = stabsects->next; - symbuf_left = bfd_section_size (sym_bfd, stabsects->section); - symbuf_read = 0; - } - - dbx_symfile_read (objfile, 0); -} - -/* Scan and build partial symbols for an ELF symbol file. - This ELF file has already been processed to get its minimal symbols, - and any DWARF symbols that were in it. - - This routine is the equivalent of dbx_symfile_init and dbx_symfile_read - rolled into one. - - OBJFILE is the object file we are reading symbols from. - ADDR is the address relative to which the symbols are (e.g. - the base address of the text segment). - MAINLINE is true if we are reading the main symbol - table (as opposed to a shared lib or dynamically loaded file). - STABOFFSET and STABSIZE define the location in OBJFILE where the .stab - section exists. - STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the - .stabstr section exists. - - This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, - adjusted for elf details. */ - -void -elfstab_build_psymtabs (struct objfile *objfile, int mainline, - file_ptr staboffset, unsigned int stabsize, - file_ptr stabstroffset, unsigned int stabstrsize) -{ - int val; - bfd *sym_bfd = objfile->obfd; - char *name = bfd_get_filename (sym_bfd); - struct dbx_symfile_info *info; - - /* There is already a dbx_symfile_info allocated by our caller. - It might even contain some info from the ELF symtab to help us. */ - info = objfile->sym_stab_info; - - /* Find the first and last text address. dbx_symfile_read seems to - want this. */ - find_text_range (sym_bfd, objfile); - -#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ - DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; - DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); - DBX_STRINGTAB_SIZE (objfile) = stabstrsize; - DBX_SYMTAB_OFFSET (objfile) = staboffset; - - if (stabstrsize > bfd_get_size (sym_bfd)) - error ("ridiculous string table size: %d bytes", stabstrsize); - DBX_STRINGTAB (objfile) = (char *) - obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1); - OBJSTAT (objfile, sz_strtab += stabstrsize + 1); - - /* Now read in the string table in one big gulp. */ - - val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); - if (val < 0) - perror_with_name (name); - val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); - if (val != stabstrsize) - perror_with_name (name); - - stabsread_new_init (); - buildsym_new_init (); - free_header_files (); - init_header_files (); - install_minimal_symbols (objfile); - - processing_acc_compilation = 1; - - /* In an elf file, we've already installed the minimal symbols that came - from the elf (non-stab) symbol table, so always act like an - incremental load here. */ - dbx_symfile_read (objfile, 0); -} - -/* Scan and build partial symbols for a file with special sections for stabs - and stabstrings. The file has already been processed to get its minimal - symbols, and any other symbols that might be necessary to resolve GSYMs. - - This routine is the equivalent of dbx_symfile_init and dbx_symfile_read - rolled into one. - - OBJFILE is the object file we are reading symbols from. - ADDR is the address relative to which the symbols are (e.g. the base address - of the text segment). - MAINLINE is true if we are reading the main symbol table (as opposed to a - shared lib or dynamically loaded file). - STAB_NAME is the name of the section that contains the stabs. - STABSTR_NAME is the name of the section that contains the stab strings. - - This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */ - -void -stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name, - char *stabstr_name, char *text_name) -{ - int val; - bfd *sym_bfd = objfile->obfd; - char *name = bfd_get_filename (sym_bfd); - asection *stabsect; - asection *stabstrsect; - asection *text_sect; - - stabsect = bfd_get_section_by_name (sym_bfd, stab_name); - stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name); - - if (!stabsect) - return; - - if (!stabstrsect) - error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)", - stab_name, stabstr_name); - - objfile->sym_stab_info = (struct dbx_symfile_info *) - xmalloc (sizeof (struct dbx_symfile_info)); - memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); - - text_sect = bfd_get_section_by_name (sym_bfd, text_name); - if (!text_sect) - error ("Can't find %s section in symbol file", text_name); - DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); - DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); - - DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist); - DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect) - / DBX_SYMBOL_SIZE (objfile); - DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect); - DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */ - - if (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) + 1); - OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1); - - /* Now read in the string table in one big gulp. */ - - val = bfd_get_section_contents (sym_bfd, /* bfd */ - stabstrsect, /* bfd section */ - DBX_STRINGTAB (objfile), /* input buffer */ - 0, /* offset into section */ - DBX_STRINGTAB_SIZE (objfile)); /* amount to read */ - - if (!val) - perror_with_name (name); - - stabsread_new_init (); - buildsym_new_init (); - free_header_files (); - init_header_files (); - install_minimal_symbols (objfile); - - /* Now, do an incremental load */ - - processing_acc_compilation = 1; - dbx_symfile_read (objfile, 0); -} - -static struct sym_fns aout_sym_fns = -{ - bfd_target_aout_flavour, - dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ - dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ - dbx_symfile_read, /* sym_read: read a symbol file into symtab */ - dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ - default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ - NULL /* next: pointer to next struct sym_fns */ -}; - -void -_initialize_dbxread (void) -{ - add_symtab_fns (&aout_sym_fns); -} |