/* Read dbx symbol tables and convert to internal format, for GDB.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
-\f
-#include "param.h"
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991 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., 675 Mass Ave, Cambridge, MA 02139, 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 <string.h>
+
+#if defined(USG) || defined(__CYGNUSCLIB__)
+#include <sys/types.h>
+#include <fcntl.h>
+#define L_SET 0
+#define L_INCR 1
+#endif
-#ifdef READ_DBX_FORMAT
+#ifdef GDB_TARGET_IS_HPPA
+/* We don't want to use HP-UX's nlists. */
+#define _NLIST_INCLUDED
+#endif
-#include <a.out.h>
-#include <stab.h>
-#include <stdio.h>
#include <obstack.h>
#include <sys/param.h>
+#ifndef NO_SYS_FILE
#include <sys/file.h>
-#include "defs.h"
-#include "initialize.h"
+#endif
+#include <sys/stat.h>
+#include <ctype.h>
#include "symtab.h"
-
-static void add_symbol_to_list ();
-static void read_dbx_symtab ();
-static void process_one_symbol ();
-static struct type *read_type ();
-static struct type *read_range_type ();
-static struct type *read_enum_type ();
-static struct type *read_struct_type ();
-static long read_number ();
-static void finish_block ();
-static struct blockvector *make_blockvector ();
-static struct symbol *define_symbol ();
-static void start_subfile ();
-static int hashname ();
-static void hash_symsegs ();
-extern struct symtab *read_symsegs ();
-
-START_FILE
-
-/* Chain of symtabs made from reading the file's symsegs.
- These symtabs do not go into symtab_list themselves,
- but the information is copied from them when appropriate
- to make the symtabs that will exist permanently. */
-
-static struct symtab *symseg_chain;
-
-/* Symseg symbol table for the file whose data we are now processing.
- It is one of those in symseg_chain. Or 0, for a compilation that
- has no symseg. */
-
-static struct symtab *current_symseg;
-
-/* Name of source file whose symbol data we are now processing.
- This comes from a symbol of type N_SO. */
-
-static char *last_source_file;
-
-/* Core address of start of text of current source file.
- This too comes from the N_SO symbol. */
-
-static CORE_ADDR last_source_start_addr;
-
-/* End of the text segment of the executable file,
- as found in the symbol _etext. */
-
-static CORE_ADDR end_of_text_addr;
-
-/* The list of sub-source-files within the current individual compilation.
- Each file gets its own symtab with its own linetable and associated info,
- but they all share one blockvector. */
-
-struct subfile
-{
- struct subfile *next;
- char *name;
- struct linetable *line_vector;
- int line_vector_length;
- int line_vector_index;
- int prev_line_number;
+#include "breakpoint.h"
+#include "command.h"
+#include "target.h"
+#include "gdbcore.h" /* for bfd stuff */
+#include "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */
+#ifdef GDB_TARGET_IS_HPPA
+#include "libhppa.h"
+#include "syms.h"
+#else
+#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
+#endif
+#include "symfile.h"
+#include "objfiles.h"
+#include "buildsym.h"
+#include "stabsread.h"
+#include "gdb-stabs.h"
+#include "demangle.h"
+
+#include "aout/aout64.h"
+#include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
+
+/* Each partial symbol table entry contains a pointer to private data for the
+ read_symtab() function to use when expanding a partial symbol table entry
+ to a full symbol table entry.
+
+ For dbxread this structure contains the offset within the file symbol table
+ of first local symbol for this file, and 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). It also contains
+ further information needed to locate the symbols if they are in an ELF file.
+
+ 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. */
+
+#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 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)
+
+struct symloc {
+ int ldsymoff;
+ int ldsymlen;
+ int symbol_size;
+ int symbol_offset;
+ int string_offset;
+ int file_string_offset;
};
-static struct subfile *subfiles;
+/* Macro to determine which symbols to ignore when reading the first symbol
+ of a file. Some machines override this definition. */
+#ifndef IGNORE_SYMBOL
+/* This code is used on Ultrix systems. Ignore it */
+#define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
+#endif
+
+/* Macro for name of symbol to indicate a file compiled with gcc. */
+#ifndef GCC_COMPILED_FLAG_SYMBOL
+#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
+#endif
-static struct subfile *current_subfile;
+/* Macro for name of symbol to indicate a file compiled with gcc2. */
+#ifndef GCC2_COMPILED_FLAG_SYMBOL
+#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled."
+#endif
-/* The addresses of the symbol table stream and the string table
- of the object file we are reading (as copied into core). */
+/* Define this as 1 if a pcc declaration of a char or short argument
+ gives the correct address. Otherwise assume pcc gives the
+ address of the corresponding int, which is not the same on a
+ big-endian machine. */
-static FILE *nlist_stream_global;
-static int nlist_size_global;
-static char *stringtab_global;
+#ifndef BELIEVE_PCC_PROMOTION
+#define BELIEVE_PCC_PROMOTION 0
+#endif
-/* The index in nlist_global of the last dbx symbol to be processed. */
+/* Nonzero means give verbose info on gdb action. From main.c. */
+extern int info_verbose;
-static int symnum;
+/* The BFD for this file -- implicit parameter to next_symbol_text. */
-/* Vector of types defined so far, indexed by their dbx type numbers.
- (In newer sun systems, dbx uses a pair of numbers in parens,
- as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
- translated through the type_translations hash table to get
- the index into the type vector.) */
+static bfd *symfile_bfd;
-static struct typevector *type_vector;
+/* 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. */
-/* Number of elements allocated for type_vector currently. */
+static unsigned symbol_size;
-static int type_vector_length;
+/* This is the offset of the symbol table in the executable file */
+static unsigned symbol_table_offset;
-/* Vector of line number information. */
+/* This is the offset of the string table in the executable file */
+static unsigned string_table_offset;
-static struct linetable *line_vector;
+/* 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;
-/* Index of next entry to go in line_vector_index. */
+/* Complaints about the symbols we have encountered. */
-static int line_vector_index;
+struct complaint lbrac_complaint =
+ {"bad block start address patched", 0, 0};
-/* Last line number recorded in the line vector. */
+struct complaint string_table_offset_complaint =
+ {"bad string table offset in symbol %d", 0, 0};
-static int prev_line_number;
+struct complaint unknown_symtype_complaint =
+ {"unknown symbol type %s", 0, 0};
-/* Number of elements allocated for line_vector currently. */
+struct complaint lbrac_rbrac_complaint =
+ {"block start larger than block end", 0, 0};
-static int line_vector_length;
+struct complaint lbrac_unmatched_complaint =
+ {"unmatched N_LBRAC before symtab pos %d", 0, 0};
-/* Chain of global symbols whose values are not known yet.
- They are chained thru the SYMBOL_VALUE, since we don't
- have the correct data for that slot yet. */
+struct complaint lbrac_mismatch_complaint =
+ {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
-#define HASHSIZE 127
-static struct symbol *global_sym_chain[HASHSIZE];
+struct complaint repeated_header_complaint =
+ {"\"repeated\" header file not previously seen, at symtab pos %d", 0, 0};
-/* Record the symbols defined for each context in a list.
- We don't create a struct block for the context until we
- know how long to make it. */
+struct complaint repeated_header_name_complaint =
+ {"\"repeated\" header file not previously seen, named %s", 0, 0};
+\f
+/* 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 pending
+struct header_file_location
{
- struct pending *next;
- struct symbol *symbol;
+ 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 */
};
-/* Here are the three lists that symbols are put on. */
-
-struct pending *file_symbols; /* static at top level, and types */
-
-struct pending *global_symbols; /* global functions and variables */
+/* The actual list and controling variables */
+static struct header_file_location *bincl_list, *next_bincl;
+static int bincls_allocated;
-struct pending *local_symbols; /* everything local to lexical context */
-
-/* List of unclosed lexical contexts
- (that will become blocks, eventually). */
-
-struct context_stack
-{
- struct context_stack *next;
- struct pending *locals;
- struct pending_block *old_blocks;
- struct symbol *name;
- CORE_ADDR start_addr;
- int depth;
-};
+/* Local function prototypes */
-struct context_stack *context_stack;
+static void
+free_header_files PARAMS ((void));
-/* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
+static void
+init_header_files PARAMS ((void));
-int within_function;
+static struct pending *
+copy_pending PARAMS ((struct pending *, int, struct pending *));
-/* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
+static struct symtab *
+read_ofile_symtab PARAMS ((struct objfile *, int, int, CORE_ADDR, int,
+ struct section_offsets *));
-struct pending_block
-{
- struct pending_block *next;
- struct block *block;
-};
+static void
+dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *));
-struct pending_block *pending_blocks;
+static void
+dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
-extern CORE_ADDR first_object_file_end; /* From blockframe.c */
+static void
+read_dbx_symtab PARAMS ((struct section_offsets *, struct objfile *,
+ CORE_ADDR, int));
-/* File name symbols were loaded from. */
+static void
+free_bincl_list PARAMS ((struct objfile *));
-static char *symfile;
-\f
-/* Support for Sun changes to dbx symbol format */
-
-/* For each identified header file, we have a table of types defined
- in that header file.
-
- header_files maps header file names to their type tables.
- It is a vector of n_header_files elements.
- Each element describes one header file.
- It contains a vector of types.
-
- Sometimes it can happen that the same header file produces
- different results when included in different places.
- This can result from conditionals or from different
- things done before including the file.
- When this happens, there are multiple entries for the file in this table,
- one entry for each distinct set of results.
- The entries are distinguished by the INSTANCE field.
- The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
- used to match header-file references to their corresponding data. */
-
-struct header_file
-{
- char *name; /* Name of header file */
- int instance; /* Numeric code distinguishing instances
- of one header file that produced
- different results when included.
- It comes from the N_BINCL or N_EXCL. */
- struct type **vector; /* Pointer to vector of types */
- int length; /* Allocated length (# elts) of that vector */
-};
+static struct partial_symtab *
+find_corresponding_bincl_psymtab PARAMS ((char *, int));
-static struct header_file *header_files;
+static void
+add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int));
-static int n_header_files;
+static void
+init_bincl_list PARAMS ((int, struct objfile *));
-static int n_allocated_header_files;
+static void
+init_psymbol_list PARAMS ((struct objfile *));
-/* Within each object file, various header files are assigned numbers.
- A type is defined or referred to with a pair of numbers
- (FILENUM,TYPENUM) where FILENUM is the number of the header file
- and TYPENUM is the number within that header file.
- TYPENUM is the index within the vector of types for that header file.
+static char *
+dbx_next_symbol_text PARAMS ((void));
- FILENUM == 1 is special; it refers to the main source of the object file,
- and not to any header file. FILENUM != 1 is interpreted by looking it up
- in the following table, which contains indices in header_files. */
+static void
+fill_symbuf PARAMS ((bfd *));
-static int *this_object_header_files;
+static void
+dbx_symfile_init PARAMS ((struct objfile *));
-static int n_this_object_header_files;
+static void
+dbx_new_init PARAMS ((struct objfile *));
-static int n_allocated_this_object_header_files;
+static void
+dbx_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
-/* When a header file is getting special overriding definitions
- for one source file, record here the header_files index
- of its normal definition vector.
- At other times, this is -1. */
+static void
+dbx_symfile_finish PARAMS ((struct objfile *));
-static int header_file_prev_index;
+static void
+record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));
-/* At the start of reading dbx symbols, allocate our tables. */
+static void
+add_new_header_file PARAMS ((char *, int));
static void
-init_header_files ()
-{
- n_allocated_header_files = 10;
- header_files = (struct header_file *) xmalloc (10 * sizeof (struct header_file));
- n_header_files = 0;
+add_old_header_file PARAMS ((char *, int));
- n_allocated_this_object_header_files = 10;
- this_object_header_files = (int *) xmalloc (10 * sizeof (int));
-}
+static void
+add_this_object_header_file PARAMS ((int));
-/* At the end of reading dbx symbols, free our tables. */
+/* Free up old header file tables */
static void
free_header_files ()
{
register int i;
- for (i = 0; i < n_header_files; i++)
- free (header_files[i].name);
- free (header_files);
- free (this_object_header_files);
+
+ if (header_files != NULL)
+ {
+ for (i = 0; i < n_header_files; i++)
+ {
+ free (header_files[i].name);
+ }
+ free ((PTR)header_files);
+ header_files = NULL;
+ n_header_files = 0;
+ }
+ if (this_object_header_files)
+ {
+ free ((PTR)this_object_header_files);
+ this_object_header_files = NULL;
+ }
+ n_allocated_header_files = 0;
+ n_allocated_this_object_header_files = 0;
}
-/* Called at the start of each object file's symbols.
- Clear out the mapping of header file numbers to header files. */
+/* Allocate new header file tables */
static void
-new_object_header_files ()
+init_header_files ()
{
- /* Leave FILENUM of 0 free for builtin types and this file's types. */
- n_this_object_header_files = 1;
- header_file_prev_index = -1;
+ n_header_files = 0;
+ n_allocated_header_files = 10;
+ header_files = (struct header_file *)
+ xmalloc (10 * sizeof (struct header_file));
+
+ 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
{
n_allocated_this_object_header_files *= 2;
this_object_header_files
- = (int *) xrealloc (this_object_header_files,
+ = (int *) xrealloc ((char *) this_object_header_files,
n_allocated_this_object_header_files * sizeof (int));
}
add_this_object_header_file (i);
return;
}
- error ("Invalid symbol data: \"repeated\" header file that hasn't been seen before, at symtab pos %d.",
- symnum);
+ complain (&repeated_header_complaint, (char *)symnum);
+ complain (&repeated_header_name_complaint, name);
}
/* Add to this file a "new" header file: definitions for its types follow.
int instance;
{
register int i;
- register struct header_file *p = header_files;
- header_file_prev_index = -1;
-
-#if 0
- /* This code was used before I knew about the instance codes.
- My first hypothesis is that it is not necessary now
- that instance codes are handled. */
-
- /* Has this header file a previous definition?
- If so, make a new entry anyway so that this use in this source file
- gets a separate entry. Later source files get the old entry.
- Record here the index of the old entry, so that any type indices
- not previously defined can get defined in the old entry as
- well as in the new one. */
-
- for (i = 0; i < n_header_files; i++)
- if (!strcmp (p[i].name, name))
- {
- header_file_prev_index = i;
- }
-
-#endif
/* Make sure there is room for one more header file. */
if (n_header_files == n_allocated_header_files)
{
n_allocated_header_files *= 2;
- header_files
- = (struct header_file *) xrealloc (header_files, n_allocated_header_files * sizeof (struct header_file));
+ header_files = (struct header_file *)
+ xrealloc ((char *) header_files,
+ (n_allocated_header_files * sizeof (struct header_file)));
}
/* Create an entry for this header file. */
i = n_header_files++;
- header_files[i].name = name;
+ header_files[i].name = savestring (name, strlen(name));
header_files[i].instance = instance;
header_files[i].length = 10;
header_files[i].vector
= (struct type **) xmalloc (10 * sizeof (struct type *));
- bzero (header_files[i].vector, 10 * sizeof (struct type *));
+ memset (header_files[i].vector, 0, 10 * sizeof (struct type *));
add_this_object_header_file (i);
}
-/* Look up a dbx type-number pair. Return the address of the slot
- where the type for that number-pair is stored.
- The number-pair is in TYPENUMS.
-
- This can be used for finding the type associated with that pair
- or for associating a new type with the pair. */
-
-static struct type **
-dbx_lookup_type (typenums)
- int typenums[2];
-{
- register int filenum = typenums[0], index = typenums[1];
-
- if (filenum < 0 || filenum >= n_this_object_header_files)
- error ("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
- filenum, index, symnum);
-
- if (filenum == 0)
- {
- /* Type is defined outside of header files.
- Find it in this object file's type vector. */
- if (index >= type_vector_length)
- {
- type_vector_length *= 2;
- type_vector = (struct typevector *)
- xrealloc (type_vector, sizeof (struct typevector) + type_vector_length * sizeof (struct type *));
- bzero (&type_vector->type[type_vector_length / 2],
- type_vector_length * sizeof (struct type *) / 2);
- }
- return &type_vector->type[index];
- }
- else
- {
- register int real_filenum = this_object_header_files[filenum];
- register struct header_file *f;
-
- if (real_filenum >= n_header_files)
- abort ();
-
- f = &header_files[real_filenum];
-
- if (index >= f->length)
- {
- f->length *= 2;
- f->vector = (struct type **)
- xrealloc (f->vector, f->length * sizeof (struct type *));
- bzero (&f->vector[f->length / 2],
- f->length * sizeof (struct type *) / 2);
- }
- return &f->vector[index];
- }
-}
-
-/* Make sure there is a type allocated for type numbers TYPENUMS
- and return the type object.
- This can create an empty (zeroed) type object. */
-
-static struct type *
-dbx_alloc_type (typenums)
- int typenums[2];
-{
- register struct type **type_addr = dbx_lookup_type (typenums);
- register struct type *type = *type_addr;
-
- /* If we are referring to a type not known at all yet,
- allocate an empty type for it.
- We will fill it in later if we find out how. */
- if (type == 0)
- {
- type = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
- bzero (type, sizeof (struct type));
- *type_addr = type;
- }
- return type;
-}
-
#if 0
static struct type **
explicit_lookup_type (real_filenum, index)
}
#endif
\f
-/* maintain the lists of symbols and blocks */
-
-/* Add a symbol to one of the lists of symbols. */
static void
-add_symbol_to_list (symbol, listhead)
- struct symbol *symbol;
- struct pending **listhead;
+record_minimal_symbol (name, address, type, objfile)
+ char *name;
+ CORE_ADDR address;
+ int type;
+ struct objfile *objfile;
{
- register struct pending *link
- = (struct pending *) xmalloc (sizeof (struct pending));
+ enum minimal_symbol_type ms_type;
+
+ switch (type &~ N_EXT) {
+ case N_TEXT: ms_type = mst_text; break;
+ case N_DATA: ms_type = mst_data; break;
+ case N_BSS: ms_type = mst_bss; break;
+ case N_ABS: ms_type = mst_abs; break;
+#ifdef N_SETV
+ case N_SETV: ms_type = mst_data; break;
+#endif
+ default: ms_type = mst_unknown; break;
+ }
- link->next = *listhead;
- link->symbol = symbol;
- *listhead = link;
+ prim_record_minimal_symbol (obsavestring (name, strlen (name), &objfile -> symbol_obstack),
+ address, ms_type);
}
+\f
+/* 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.
-/* Take one of the lists of symbols and make a block from it.
- Put the block on the list of pending blocks. */
+ SECTION_OFFSETS contains offsets relative to which the symbols in the
+ various sections are (depending where the sections were actually loaded).
+ MAINLINE is true if we are reading the main symbol
+ table (as opposed to a shared lib or dynamically loaded file). */
static void
-finish_block (symbol, listhead, old_blocks, start, end)
- struct symbol *symbol;
- struct pending **listhead;
- struct pending_block *old_blocks;
- CORE_ADDR start, end;
+dbx_symfile_read (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline; /* FIXME comments above */
{
- register struct pending *next, *next1;
- register struct block *block;
- register struct pending_block *pblock;
- struct pending_block *opblock;
- register int i;
+ bfd *sym_bfd;
+ int val;
- /* Count the length of the list of symbols. */
+ sym_bfd = objfile->obfd;
+ val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), L_SET);
+ if (val < 0)
+ perror_with_name (objfile->name);
- for (next = *listhead, i = 0; next; next = next->next, i++);
+ /* 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);
- block = (struct block *) obstack_alloc (symbol_obstack,
- sizeof (struct block) + (i - 1) * sizeof (struct symbol *));
+#ifdef GDB_TARGET_IS_HPPA
+ symbol_size = obj_dbx_symbol_entry_size (sym_bfd);
+#else
+ symbol_size = DBX_SYMBOL_SIZE (objfile);
+#endif
+ symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
- /* Copy the symbols into the block. */
+ pending_blocks = 0;
+ make_cleanup (really_free_pendings, 0);
- BLOCK_NSYMS (block) = i;
- for (next = *listhead; next; next = next->next)
- BLOCK_SYM (block, --i) = next->symbol;
+ init_minimal_symbol_collection ();
+ make_cleanup (discard_minimal_symbols, 0);
- BLOCK_START (block) = start;
- BLOCK_END (block) = end;
- BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */
+ /* Now that the symbol table data of the executable file are all in core,
+ process them and define symbols accordingly. */
- /* Put the block in as the value of the symbol that names it. */
+ read_dbx_symtab (section_offsets, objfile,
+ bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)),
+ bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile)));
- if (symbol)
- {
- SYMBOL_BLOCK_VALUE (symbol) = block;
- BLOCK_FUNCTION (block) = symbol;
- }
- else
- BLOCK_FUNCTION (block) = 0;
+ /* Install any minimal symbols that have been collected as the current
+ minimal symbols for this objfile. */
- /* Now free the links of the list, and empty the list. */
+ install_minimal_symbols (objfile);
- for (next = *listhead; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
- *listhead = 0;
+ if (!have_partial_symbols ()) {
+ wrap_here ("");
+ printf_filtered ("(no debugging symbols found)...");
+ wrap_here ("");
+ }
+}
- /* Install this block as the superblock
- of all blocks made since the start of this scope
- that don't have superblocks yet. */
+/* 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). */
- opblock = 0;
- for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
- {
- if (BLOCK_SUPERBLOCK (pblock->block) == 0)
- BLOCK_SUPERBLOCK (pblock->block) = block;
- opblock = pblock;
- }
+static void
+dbx_new_init (ignore)
+ struct objfile *ignore;
+{
+ stabsread_new_init ();
+ buildsym_new_init ();
+ init_header_files ();
+}
- /* Record this block on the list of all blocks in the file.
- Put it after opblock, or at the beginning if opblock is 0.
- This puts the block in the list after all its subblocks. */
- pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block));
- pblock->block = block;
- if (opblock)
- {
- pblock->next = opblock->next;
- opblock->next = pblock;
- }
- else
- {
- pblock->next = pending_blocks;
- pending_blocks = pblock;
- }
-}
+/* 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.
-static struct blockvector *
-make_blockvector ()
+ 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. */
+
+static void
+dbx_symfile_init (objfile)
+ struct objfile *objfile;
{
- register struct pending_block *next, *next1;
- register struct blockvector *blockvector;
- register int i;
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+ unsigned char size_temp[4];
+
+ /* Allocate struct to keep track of the symfile */
+ objfile->sym_private = (PTR)
+ xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
+
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+#ifdef GDB_TARGET_IS_HPPA
+#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_dbx_str_filepos (sym_bfd))
+#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_dbx_sym_filepos (sym_bfd))
+#define HP_STRING_TABLE_OFFSET (sym_bfd->origin + obj_hp_str_filepos (sym_bfd))
+#define HP_SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_hp_sym_filepos (sym_bfd))
+#else
+#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
+#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
+#endif
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+
+ DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
+ DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
+ if (!DBX_TEXT_SECT (objfile))
+ error ("Can't find .text section in symbol file");
- /* Count the length of the list of blocks. */
+#ifdef GDB_TARGET_IS_HPPA
+ HP_SYMCOUNT (objfile) = obj_hp_sym_count (sym_bfd);
+ DBX_SYMCOUNT (objfile) = obj_dbx_sym_count (sym_bfd);
+#else
+ DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
+ DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
+#endif
+ DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
+
+ /* Read the string table and stash it away in the psymbol_obstack. It is
+ only needed as long as we need to expand psymbols into full symbols,
+ so when we blow away the psymbol the string table goes away as well.
+ Note that gdb used to use the results of attempting to malloc the
+ string table, based on the size it read, as a form of sanity check
+ for botched byte swapping, on the theory that a byte swapped string
+ table size would be so totally bogus that the malloc would fail. Now
+ that we put in on the psymbol_obstack, we can't do this since gdb gets
+ a fatal error (out of virtual memory) if the size is bogus. We can
+ however at least check to see if the size is zero or some negative
+ value. */
+
+#ifdef GDB_TARGET_IS_HPPA
+ DBX_STRINGTAB_SIZE (objfile) = obj_dbx_stringtab_size (sym_bfd);
+ HP_STRINGTAB_SIZE (objfile) = obj_hp_stringtab_size (sym_bfd);
+#else
+ val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
+ if (val < 0)
+ perror_with_name (name);
+
+ val = bfd_read ((PTR)size_temp, sizeof (long), 1, sym_bfd);
+ if (val < 0)
+ perror_with_name (name);
- for (next = pending_blocks, i = 0; next; next = next->next, i++);
+ DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
+#endif
- blockvector = (struct blockvector *) obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *));
+ if (DBX_STRINGTAB_SIZE (objfile) <= 0)
+ error ("ridiculous string table size (%d bytes).",
+ DBX_STRINGTAB_SIZE (objfile));
+
+ DBX_STRINGTAB (objfile) =
+ (char *) obstack_alloc (&objfile -> psymbol_obstack,
+ DBX_STRINGTAB_SIZE (objfile));
+#ifdef GDB_TARGET_IS_HPPA
+ if (HP_STRINGTAB_SIZE (objfile) <= 0)
+ error ("ridiculous string table size (%d bytes).",
+ HP_STRINGTAB_SIZE (objfile));
+
+ HP_STRINGTAB (objfile) =
+ (char *) obstack_alloc (&objfile -> psymbol_obstack,
+ HP_STRINGTAB_SIZE (objfile));
+#endif
- /* Copy the blocks into the blockvector.
- This is done in reverse order, which happens to put
- the blocks into the proper order (ascending starting address).
- finish_block has hair to insert each block into the list
- after its subblocks in order to make sure this is true. */
+ /* Now read in the string table in one big gulp. */
- BLOCKVECTOR_NBLOCKS (blockvector) = i;
- for (next = pending_blocks; next; next = next->next)
- BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
+ val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
+ sym_bfd);
+ if (val != DBX_STRINGTAB_SIZE (objfile))
+ perror_with_name (name);
+#ifdef GDB_TARGET_IS_HPPA
+ val = bfd_seek (sym_bfd, HP_STRING_TABLE_OFFSET, L_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (HP_STRINGTAB (objfile), HP_STRINGTAB_SIZE (objfile), 1,
+ sym_bfd);
+ if (val != HP_STRINGTAB_SIZE (objfile))
+ perror_with_name (name);
+#endif
+#ifdef GDB_TARGET_IS_HPPA
+ HP_SYMTAB_OFFSET (objfile) = HP_SYMBOL_TABLE_OFFSET;
+#endif
+}
- /* Now free the links of the list, and empty the list. */
+/* 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. */
- for (next = pending_blocks; next; next = next1)
+static void
+dbx_symfile_finish (objfile)
+ struct objfile *objfile;
+{
+ if (objfile->sym_private != NULL)
{
- next1 = next->next;
- free (next);
+ mfree (objfile -> md, objfile->sym_private);
}
- pending_blocks = 0;
-
- return blockvector;
+ free_header_files ();
}
+
\f
-/* Manage the vector of line numbers. */
+/* Buffer for reading the symbol table entries. */
+static struct internal_nlist symbuf[4096];
+static int symbuf_idx;
+static int symbuf_end;
+
+/* 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. */
+static char *stringtab_global;
+
+/* 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
-record_line (line, pc)
- int line;
- CORE_ADDR pc;
+static void
+fill_symbuf (sym_bfd)
+ bfd *sym_bfd;
{
- /* Ignore the dummy line number in libg.o */
+ int nbytes = bfd_read ((PTR)symbuf, sizeof (symbuf), 1, 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;
+}
+#ifdef GDB_TARGET_IS_HPPA
+/* same as above for the HP symbol table */
- if (line == 0xffff)
- return;
+static struct symbol_dictionary_record hp_symbuf[4096];
+static int hp_symbuf_idx;
+static int hp_symbuf_end;
+
+static int
+fill_hp_symbuf (sym_bfd)
+ bfd *sym_bfd;
+{
+ int nbytes = bfd_read ((PTR)hp_symbuf, sizeof (hp_symbuf), 1, sym_bfd);
+ if (nbytes <= 0)
+ error ("error or end of file reading symbol table");
+ hp_symbuf_end = nbytes / sizeof (struct symbol_dictionary_record);
+ hp_symbuf_idx = 0;
+ return 1;
+}
+#endif
- /* Make sure line vector is big enough. */
+#define SWAP_SYMBOL(symp, abfd) \
+ { \
+ (symp)->n_strx = bfd_h_get_32(abfd, \
+ (unsigned char *)&(symp)->n_strx); \
+ (symp)->n_desc = bfd_h_get_16 (abfd, \
+ (unsigned char *)&(symp)->n_desc); \
+ (symp)->n_value = bfd_h_get_32 (abfd, \
+ (unsigned char *)&(symp)->n_value); \
+ }
- if (line_vector_index + 1 >= line_vector_length)
- {
- line_vector_length *= 2;
- line_vector = (struct linetable *)
- xrealloc (line_vector,
- sizeof (struct linetable) + line_vector_length * sizeof (int));
- current_subfile->line_vector = line_vector;
- }
+/* 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. */
- /* If this line is not continguous with previous one recorded,
- record a line-number entry for it. */
- if (line != prev_line_number + 1)
- line_vector->item[line_vector_index++] = - line;
- prev_line_number = line;
+/* 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. */
- /* Record the core address of the line. */
- line_vector->item[line_vector_index++] = pc;
+static char *
+dbx_next_symbol_text ()
+{
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf (symfile_bfd);
+ symnum++;
+ SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd);
+ return symbuf[symbuf_idx++].n_strx + stringtab_global
+ + file_string_table_offset;
}
\f
-/* Start a new symtab for a new source file.
- This is called when a dbx symbol of type N_SO is seen;
- it indicates the start of data for one original source file. */
+/* Initializes storage for all of the partial symbols that will be
+ created by read_dbx_symtab and subsidiaries. */
static void
-start_symtab (name, start_addr)
- char *name;
- CORE_ADDR start_addr;
+init_psymbol_list (objfile)
+ struct objfile *objfile;
{
- register struct symtab *s;
-
- last_source_file = name;
- last_source_start_addr = start_addr;
- file_symbols = 0;
- global_symbols = 0;
- context_stack = 0;
- within_function = 0;
-
- new_object_header_files ();
-
- for (s = symseg_chain; s; s = s->next)
- if (s->ldsymoff == symnum * sizeof (struct nlist))
- break;
- current_symseg = s;
-
- type_vector_length = 160;
- type_vector = (struct typevector *) xmalloc (sizeof (struct typevector) + type_vector_length * sizeof (struct type *));
- bzero (type_vector->type, type_vector_length * sizeof (struct type *));
+ /* Free any previously allocated psymbol lists. */
+ if (objfile -> global_psymbols.list)
+ mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
+ if (objfile -> static_psymbols.list)
+ mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
+
+ /* Current best guess is that there are approximately a twentieth
+ of the total symbols (in a debugging file) are global or static
+ oriented symbols */
+#ifdef GDB_TARGET_IS_HPPA
+ objfile -> global_psymbols.size = (DBX_SYMCOUNT (objfile) +
+ HP_SYMCOUNT (objfile)) / 10;
+ objfile -> static_psymbols.size = (DBX_SYMCOUNT (objfile) +
+ HP_SYMCOUNT (objfile)) / 10;
+#else
+ objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
+ objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10;
+#endif
+ objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *)
+ xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol));
+ objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *)
+ xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol));
+}
- /* Initialize the list of sub source files with one entry
- for this file (the top-level source file). */
+/* Initialize the list of bincls to contain none and have some
+ allocated. */
- subfiles = 0;
- current_subfile = 0;
- start_subfile (name);
+static void
+init_bincl_list (number, objfile)
+ 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));
}
-/* Handle an N_SOL symbol, which indicates the start of
- code that came from an included (or otherwise merged-in)
- source file with a different name. */
+/* Add a bincl to the list. */
static void
-start_subfile (name)
+add_bincl_to_list (pst, name, instance)
+ struct partial_symtab *pst;
char *name;
+ int instance;
{
- register struct subfile *subfile;
-
- /* Save the current subfile's line vector data. */
-
- if (current_subfile)
+ if (next_bincl >= bincl_list + bincls_allocated)
{
- current_subfile->line_vector_index = line_vector_index;
- current_subfile->line_vector_length = line_vector_length;
- current_subfile->prev_line_number = prev_line_number;
+ 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;
+}
- /* See if this subfile is already known as a subfile of the
- current main source file. */
+/* Given a name, value pair, find the corresponding
+ bincl in the list. Return the partial symtab associated
+ with that header_file_location. */
- for (subfile = subfiles; subfile; subfile = subfile->next)
- {
- if (!strcmp (subfile->name, name))
- {
- line_vector = subfile->line_vector;
- line_vector_index = subfile->line_vector_index;
- line_vector_length = subfile->line_vector_length;
- prev_line_number = subfile->prev_line_number;
- current_subfile = subfile;
- return;
- }
- }
+static struct partial_symtab *
+find_corresponding_bincl_psymtab (name, instance)
+ char *name;
+ int instance;
+{
+ struct header_file_location *bincl;
- /* This subfile is not known. Add an entry for it. */
+ for (bincl = bincl_list; bincl < next_bincl; bincl++)
+ if (bincl->instance == instance
+ && !strcmp (name, bincl->name))
+ return bincl->pst;
- line_vector_index = 0;
- line_vector_length = 1000;
- prev_line_number = -2; /* Force first line number to be explicit */
- line_vector = (struct linetable *)
- xmalloc (sizeof (struct linetable) + line_vector_length * sizeof (int));
+ return (struct partial_symtab *) 0;
+}
- /* Make an entry for this subfile in the list of all subfiles
- of the current main source file. */
+/* Free the storage allocated for the bincl list. */
- subfile = (struct subfile *) xmalloc (sizeof (struct subfile));
- subfile->next = subfiles;
- subfile->name = savestring (name, strlen (name));
- subfile->line_vector = line_vector;
- subfiles = subfile;
- current_subfile = subfile;
+static void
+free_bincl_list (objfile)
+ struct objfile *objfile;
+{
+ mfree (objfile -> md, (PTR)bincl_list);
+ bincls_allocated = 0;
}
-/* Finish the symbol definitions for one main source file,
- close off all the lexical contexts for that file
- (creating struct block's for them), then make the struct symtab
- for that file and put it in the list of all such.
-
- END_ADDR is the address of the end of the file's text. */
+/* Given pointers to an a.out symbol table in core containing dbx
+ style data, setup partial_symtab's describing each source file for
+ which debugging information is available.
+ SYMFILE_NAME is the name of the file we are reading from
+ and SECTION_OFFSETS is the set of offsets for the various sections
+ of the file (a set of zeros if the mainline program). */
static void
-end_symtab (end_addr)
- CORE_ADDR end_addr;
+read_dbx_symtab (section_offsets, objfile, text_addr, text_size)
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+ CORE_ADDR text_addr;
+ int text_size;
{
- register struct symtab *symtab;
- register struct context_stack *cstk;
- register struct blockvector *blockvector;
- register struct subfile *subfile;
- register struct linetable *lv;
- struct subfile *nextsub;
+ register struct internal_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
+ register char *namestring;
+ int nsl;
+ int past_first_source_file = 0;
+ CORE_ADDR last_o_file_start = 0;
+ struct cleanup *old_chain;
+ bfd *abfd;
+#ifdef GDB_TARGET_IS_HPPA
+ /* HP stuff */
+ struct symbol_dictionary_record *hp_bufp;
+ int hp_symnum;
+ /* A hack: the first text symbol in the debugging library */
+ int dbsubc_addr = 0;
+#endif
- /* Finish the lexical context of the last function in the file. */
- if (context_stack)
- {
- cstk = context_stack;
- /* Make a block for the local symbols within. */
- finish_block (cstk->name, &local_symbols, cstk->old_blocks,
- cstk->start_addr, end_addr);
- free (cstk);
- }
+ /* End of the text segment of the executable file. */
+ CORE_ADDR end_of_text_addr;
- /* Finish defining all the blocks of this symtab. */
- if (current_symseg == 0)
- {
- finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr);
- finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr);
- blockvector = make_blockvector ();
- }
- current_subfile->line_vector_index = line_vector_index;
+ /* Current partial symtab */
+ struct partial_symtab *pst;
- /* Now create the symtab objects proper, one for each subfile. */
- /* (The main file is one of them.) */
+ /* List of current psymtab's include files */
+ char **psymtab_include_list;
+ int includes_allocated;
+ int includes_used;
- for (subfile = subfiles; subfile; subfile = nextsub)
- {
- symtab = (struct symtab *) xmalloc (sizeof (struct symtab));
- /* Fill in its components. */
- if (current_symseg)
- {
- bcopy (current_symseg, symtab, sizeof (struct symtab));
- symtab->free_code = free_linetable;
- symtab->free_ptr = 0;
- }
- else
- {
- symtab->blockvector = blockvector;
- type_vector->length = type_vector_length;
- symtab->typevector = type_vector;
- symtab->free_code = free_linetable;
- if (subfile->next == 0)
- symtab->free_ptr = (char *) type_vector;
- }
- symtab->filename = subfile->name;
- lv = subfile->line_vector;
- lv->nitems = subfile->line_vector_index;
- symtab->linetable = (struct linetable *)
- xrealloc (lv, sizeof (struct linetable) + lv->nitems * sizeof (int));
- symtab->nlines = 0;
- symtab->line_charpos = 0;
-
- /* Link the new symtab into the list of such. */
- symtab->next = symtab_list;
- symtab_list = symtab;
-
- nextsub = subfile->next;
- free (subfile);
- }
+ /* Index within current psymtab dependency list */
+ struct partial_symtab **dependency_list;
+ int dependencies_used, dependencies_allocated;
- type_vector = 0;
- type_vector_length = -1;
- line_vector = 0;
- line_vector_length = -1;
- last_source_file = 0;
-}
-\f
-#ifdef N_BINCL
+ /* 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;
-/* Handle the N_BINCL and N_EINCL symbol types
- that act like N_SOL for switching source files
- (different subfiles, as we call them) within one object file,
- but using a stack rather than in an arbitrary order. */
+#ifdef GDB_TARGET_IS_HPPA
+ stringtab_global = HP_STRINGTAB (objfile);
+#else
+ stringtab_global = DBX_STRINGTAB (objfile);
+#endif
+
+ pst = (struct partial_symtab *) 0;
-struct subfile_stack
-{
- struct subfile_stack *next;
- char *name;
- int prev_index;
-};
+ includes_allocated = 30;
+ includes_used = 0;
+ psymtab_include_list = (char **) alloca (includes_allocated *
+ sizeof (char *));
-struct subfile_stack *subfile_stack;
+ dependencies_allocated = 30;
+ dependencies_used = 0;
+ dependency_list =
+ (struct partial_symtab **) alloca (dependencies_allocated *
+ sizeof (struct partial_symtab *));
-static void
-push_subfile ()
-{
- register struct subfile_stack *tem
- = (struct subfile_stack *) xmalloc (sizeof (struct subfile_stack));
-
- tem->next = subfile_stack;
- subfile_stack = tem;
- if (current_subfile == 0 || current_subfile->name == 0)
- abort ();
- tem->name = current_subfile->name;
- tem->prev_index = header_file_prev_index;
-}
+ old_chain = make_cleanup (free_objfile, objfile);
-static char *
-pop_subfile ()
-{
- register char *name;
- register struct subfile_stack *link = subfile_stack;
+ /* Init bincl list */
+ init_bincl_list (20, objfile);
+ make_cleanup (free_bincl_list, objfile);
- if (link == 0)
- abort ();
+ last_source_file = NULL;
- name = link->name;
- subfile_stack = link->next;
- header_file_prev_index = link->prev_index;
- free (link);
-
- return name;
-}
-#endif /* Have N_BINCL */
-\f
-/* Accumulate the misc functions in bunches of 127.
- At the end, copy them all into one newly allocated structure. */
-
-#define MISC_BUNCH_SIZE 127
-
-struct misc_bunch
-{
- struct misc_bunch *next;
- struct misc_function contents[MISC_BUNCH_SIZE];
-};
-
-/* Bunch currently being filled up.
- The next field points to chain of filled bunches. */
-
-static struct misc_bunch *misc_bunch;
-
-/* Number of slots filled in current bunch. */
-
-static int misc_bunch_index;
-
-/* Total number of misc functions recorded so far. */
+#ifdef END_OF_TEXT_DEFAULT
+ end_of_text_addr = END_OF_TEXT_DEFAULT;
+#else
+ end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT]
+ + text_size; /* Relocate */
+#endif
-static int misc_count;
+ symfile_bfd = objfile->obfd; /* For next_text_symbol */
+ abfd = objfile->obfd;
+ symbuf_end = symbuf_idx = 0;
+ next_symbol_text_func = dbx_next_symbol_text;
-static void
-init_misc_functions ()
-{
- misc_count = 0;
- misc_bunch = 0;
- misc_bunch_index = MISC_BUNCH_SIZE;
-}
+#ifdef GDB_TARGET_IS_HPPA
+ /* On pa machines, the global symbols are all in the regular HP-UX
+ symbol table. Read them in first. */
-static void
-record_misc_function (name, address)
- char *name;
- CORE_ADDR address;
-{
- register struct misc_bunch *new;
+ hp_symbuf_end = hp_symbuf_idx = 0;
+ bfd_seek (abfd, HP_SYMTAB_OFFSET (objfile), 0);
- if (misc_bunch_index == MISC_BUNCH_SIZE)
+ for (hp_symnum = 0; hp_symnum < HP_SYMCOUNT (objfile); hp_symnum++)
{
- new = (struct misc_bunch *) xmalloc (sizeof (struct misc_bunch));
- misc_bunch_index = 0;
- new->next = misc_bunch;
- misc_bunch = new;
+ int dbx_type;
+
+ QUIT;
+ if (hp_symbuf_idx == hp_symbuf_end)
+ fill_hp_symbuf (abfd);
+ hp_bufp = &hp_symbuf[hp_symbuf_idx++];
+ switch (hp_bufp->symbol_type)
+ {
+ case ST_SYM_EXT:
+ case ST_ARG_EXT:
+ continue;
+ case ST_CODE:
+ case ST_PRI_PROG:
+ case ST_SEC_PROG:
+ case ST_ENTRY:
+ case ST_MILLICODE:
+ dbx_type = N_TEXT;
+ hp_bufp->symbol_value &= ~3; /* clear out permission bits */
+ break;
+ case ST_DATA:
+ dbx_type = N_DATA;
+ break;
+#ifdef KERNELDEBUG
+ case ST_ABSOLUTE:
+ {
+ extern int kernel_debugging;
+ if (!kernel_debugging)
+ continue;
+ dbx_type = N_ABS;
+ break;
+ }
+#endif
+ default:
+ continue;
+ }
+ /* Use the address of dbsubc to finish the last psymtab. */
+ if (hp_bufp->symbol_type == ST_CODE &&
+ HP_STRINGTAB (objfile)[hp_bufp->name.n_strx] == '_' &&
+ !strcmp (HP_STRINGTAB (objfile) + hp_bufp->name.n_strx, "_dbsubc"))
+ dbsubc_addr = hp_bufp->symbol_value;
+ if (hp_bufp->symbol_scope == SS_UNIVERSAL)
+ {
+ if (hp_bufp->name.n_strx > HP_STRINGTAB_SIZE (objfile))
+ error ("Invalid symbol data; bad HP string table offset: %d",
+ hp_bufp->name.n_strx);
+ /* A hack, but gets the job done. */
+ if (!strcmp (hp_bufp->name.n_strx + HP_STRINGTAB (objfile),
+ "$START$"))
+ objfile -> ei.entry_file_lowpc = hp_bufp->symbol_value;
+ if (!strcmp (hp_bufp->name.n_strx + HP_STRINGTAB (objfile),
+ "_sr4export"))
+ objfile -> ei.entry_file_highpc = hp_bufp->symbol_value;
+ record_minimal_symbol (hp_bufp->name.n_strx + HP_STRINGTAB (objfile),
+ hp_bufp->symbol_value, dbx_type | N_EXT,
+ objfile);
+ }
}
- misc_bunch->contents[misc_bunch_index].name = name;
- misc_bunch->contents[misc_bunch_index].address = address;
- misc_bunch_index++;
- misc_count++;
-}
-
-static int
-compare_misc_functions (fn1, fn2)
- struct misc_function *fn1, *fn2;
-{
- /* Return a signed result based on unsigned comparisons
- so that we sort into unsigned numeric order. */
- if (fn1->address < fn2->address)
- return -1;
- if (fn1->address > fn2->address)
- return 1;
- return 0;
-}
-
-static void
-discard_misc_bunches ()
-{
- register struct misc_bunch *next;
+ bfd_seek (abfd, DBX_SYMTAB_OFFSET (objfile), 0);
+#endif
- while (misc_bunch)
+ for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
{
- next = misc_bunch->next;
- free (misc_bunch);
- misc_bunch = next;
+ /* 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 (bufp->n_type == (unsigned char)N_SLINE) continue;
+
+ SWAP_SYMBOL (bufp, abfd);
+
+ /* 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.
+ */
+
+/* Set namestring based on bufp. 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. */
+
+/*FIXME: Too many adds and indirections in here for the inner loop. */
+#define SET_NAMESTRING()\
+ if (((unsigned)bufp->n_strx + file_string_table_offset) >= \
+ DBX_STRINGTAB_SIZE (objfile)) { \
+ complain (&string_table_offset_complaint, (char *) symnum); \
+ namestring = "foo"; \
+ } else \
+ namestring = bufp->n_strx + file_string_table_offset + \
+ DBX_STRINGTAB (objfile)
+
+#define CUR_SYMBOL_TYPE bufp->n_type
+#define CUR_SYMBOL_VALUE bufp->n_value
+#define DBXREAD_ONLY
+#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
+ start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
+#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
+ end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)
+
+#include "partial-stab.h"
}
-}
-static void
-condense_misc_bunches ()
-{
- register int i, j;
- register struct misc_bunch *bunch;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
+ /* If there's stuff to be cleaned up, clean it up. */
+#ifndef GDB_TARGET_IS_HPPA
+ 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 < bufp->n_value
+ && objfile -> ei.entry_point >= last_o_file_start)
+ {
+ objfile -> ei.entry_file_lowpc = last_o_file_start;
+ objfile -> ei.entry_file_highpc = bufp->n_value;
+ }
#endif
- misc_function_vector
- = (struct misc_function *)
- xmalloc (misc_count * sizeof (struct misc_function));
-
- j = 0;
- bunch = misc_bunch;
- while (bunch)
+ if (pst)
{
- for (i = 0; i < misc_bunch_index; i++)
- {
- misc_function_vector[j] = bunch->contents[i];
- misc_function_vector[j].name
- = concat (misc_function_vector[j].name
- + (misc_function_vector[j].name[0] == '_' ? offset : 0),
- "", "");
- j++;
- }
- bunch = bunch->next;
- misc_bunch_index = MISC_BUNCH_SIZE;
+#ifdef GDB_TARGET_IS_HPPA
+ end_psymtab (pst, psymtab_include_list, includes_used,
+ symnum * symbol_size, dbsubc_addr,
+ dependency_list, dependencies_used);
+#else
+ end_psymtab (pst, psymtab_include_list, includes_used,
+ symnum * symbol_size, end_of_text_addr,
+ dependency_list, dependencies_used);
+#endif
}
- misc_function_count = j;
+ free_bincl_list (objfile);
+ discard_cleanups (old_chain);
+}
- /* Sort the misc functions by address. */
+/* Allocate and partially fill a partial symtab. It will be
+ completely filled at the end of the symbol list.
- qsort (misc_function_vector, j, sizeof (struct misc_function),
- compare_misc_functions);
-}
-\f
-/* Call sort_syms to sort alphabetically
- the symbols of each block of each symtab. */
+ 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 int
-compare_symbols (s1, s2)
- struct symbol **s1, **s2;
+
+struct partial_symtab *
+start_psymtab (objfile, section_offsets,
+ filename, textlow, ldsymoff, global_syms, static_syms)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ char *filename;
+ CORE_ADDR textlow;
+ int ldsymoff;
+ struct partial_symbol *global_syms;
+ struct partial_symbol *static_syms;
{
- /* Names that are less should come first. */
- register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0) return namediff;
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
+ struct partial_symtab *result =
+ start_psymtab_common(objfile, section_offsets,
+ filename, textlow, global_syms, static_syms);
+
+ result->read_symtab_private = (char *)
+ obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
+ 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);
+
+ return result;
}
-static void
-sort_syms ()
-{
- register struct symtab *s;
- register int i, nbl;
- register struct blockvector *bv;
- register struct block *b;
+/* Close off the current usage of a partial_symbol table entry. This
+ involves setting the correct number of includes (with a realloc),
+ setting the high text mark, setting the symbol length in the
+ executable, and setting the length of the global and static lists
+ of psymbols.
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- nbl = BLOCKVECTOR_NBLOCKS (bv);
- for (i = 0; i < nbl; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
- }
- }
-}
-\f
-/* This is the symbol-file command. Read the file, analyze its symbols,
- and add a struct symtab to symtab_list. */
+ The global symbols and static symbols are then seperately sorted.
+
+ Then the partial symtab is put on the global list.
+ *** List variables and peculiarities of same. ***
+ */
void
-symbol_file_command (name)
- char *name;
+end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
+ capping_text, dependency_list, number_dependencies)
+ 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;
+/* struct partial_symbol *capping_global, *capping_static;*/
{
- register int desc;
- struct exec hdr;
- struct nlist *nlist;
- char *stringtab;
- long buffer;
- register int val;
- extern void close ();
- struct cleanup *old_chain;
-
- dont_repeat ();
-
- if (name == 0)
- {
- if (symtab_list && !query ("Discard symbol table? ", 0))
- error ("Not confirmed.");
- free_all_symtabs ();
- return;
+ int i;
+ struct partial_symtab *p1;
+ struct objfile *objfile = pst -> objfile;
+
+ if (capping_symbol_offset != -1)
+ LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst);
+ pst->texthigh = capping_text;
+
+ /* 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 in partial-stab.h: if we see a static
+ or global function, and the textlow for the current pst
+ is still 0, 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 in partial-stab.h). 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.
+
+ Unfortunately, that does not cover the case where the last function
+ in the file is static. See the paragraph below for more comments
+ on this situation.
+
+ Finally, if we have a valid textlow for the current file, we run
+ down the partial_symtab_list filling in previous texthighs that
+ are still unknown. */
+
+ if (pst->texthigh == 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 + 1);
+ strncpy (p, last_function_name, n);
+ p[n] = 0;
+
+ minsym = lookup_minimal_symbol (p, objfile);
+
+ if (minsym) {
+ pst->texthigh = minsym->address + (int)minsym->info;
+ } else {
+ /* This file ends with a static function, and it's
+ difficult to imagine how hard it would be to track down
+ the elf symbol. Luckily, most of the time no one will notice,
+ since the next file will likely be compiled with -g, so
+ the code below will copy the first fuction's start address
+ back to our texthigh variable. (Also, if this file is the
+ last one in a dynamically linked program, texthigh already
+ has the right value.) If the next file isn't compiled
+ with -g, then the last function in this file winds up owning
+ all of the text space up to the next -g file, or the end (minus
+ shared libraries). This only matters for single stepping,
+ and even then it will still work, except that it will single
+ step through all of the covered functions, instead of setting
+ breakpoints around them as it usualy does. This makes it
+ pretty slow, but at least it doesn't fail.
+
+ We can fix this with a fairly big change to bfd, but we need
+ to coordinate better with Cygnus if we want to do that. FIXME. */
}
+ last_function_name = NULL;
+ }
- if (symtab_list && !query ("Load new symbol table from \"%s\"? ", name))
- error ("Not confirmed.");
-
- if (symfile)
- free (symfile);
- symfile = 0;
-
- {
- char *absolute_name;
- desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name);
- if (desc < 0)
- perror_with_name (name);
- else
- name = absolute_name;
+ /* this test will be true if the last .o file is only data */
+ if (pst->textlow == 0)
+ pst->textlow = pst->texthigh;
+
+ /* 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. */
+ if (pst->textlow) {
+ ALL_OBJFILE_PSYMTABS (objfile, p1) {
+ if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
+ p1->texthigh = pst->textlow;
+ /* if this file has only data, then make textlow match texthigh */
+ if (p1->textlow == 0)
+ p1->textlow = p1->texthigh;
+ }
+ }
}
- old_chain = make_cleanup (close, desc);
- make_cleanup (free_current_contents, &name);
+ /* End of kludge for patching Solaris textlow and texthigh. */
- val = myread (desc, &hdr, sizeof hdr);
- if (val < 0)
- perror_with_name (name);
- if (N_BADMAG (hdr))
- error ("File \"%s\" not in executable format.", name);
+ 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);
- if (hdr.a_syms == 0)
+ pst->number_of_dependencies = number_dependencies;
+ if (number_dependencies)
{
- free_all_symtabs ();
- printf ("%s does not have a symbol-table.\n", name);
- fflush (stdout);
- return;
+ 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;
- /* Now read the string table, all at once. */
- val = lseek (desc, N_SYMOFF (hdr) + hdr.a_syms, 0);
- if (val < 0)
- perror_with_name (name);
- val = myread (desc, &buffer, sizeof buffer);
- if (val < 0)
- perror_with_name (name);
- stringtab = (char *) alloca (buffer);
- bcopy (&buffer, stringtab, sizeof buffer);
- val = myread (desc, stringtab + sizeof buffer, buffer - sizeof buffer);
- if (val < 0)
- perror_with_name (name);
-
-#ifdef READ_GDB_SYMSEGS
- /* That puts us at the symsegs. Read them. */
- symseg_chain = read_symsegs (desc, name);
- hash_symsegs ();
-#else
- /* Where people are using the 4.2 ld program, must not check for
- symsegs, because that ld puts randonm garbage at the end of
- the output file and that would trigger an error message. */
- symseg_chain = 0;
-#endif
-
- /* Position to read the symbol table. Do not read it all at once. */
- val = lseek (desc, N_SYMOFF (hdr), 0);
- if (val < 0)
- perror_with_name (name);
+ for (i = 0; i < num_includes; i++)
+ {
+ struct partial_symtab *subpst =
+ allocate_psymtab (include_list[i], objfile);
+
+ subpst->section_offsets = pst->section_offsets;
+ subpst->read_symtab_private =
+ (char *) obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct symloc));
+ LDSYMOFF(subpst) =
+ LDSYMLEN(subpst) =
+ subpst->textlow =
+ subpst->texthigh = 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 = dbx_psymtab_to_symtab;
+ }
- printf ("Reading symbol data from %s...", name);
- fflush (stdout);
+ sort_pst_symbols (pst);
- /* Throw away the old symbol table. */
+ /* 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);
- free_all_symtabs ();
+ if (num_includes == 0
+ && number_dependencies == 0
+ && pst->n_global_syms == 0
+ && pst->n_static_syms == 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. */
+ struct partial_symtab *prev_pst;
- init_misc_functions ();
- make_cleanup (discard_misc_bunches, 0);
- init_header_files ();
- make_cleanup (free_header_files, 0);
+ /* First, snip it out of the psymtab chain */
- /* Now that the symbol table data of the executable file are all in core,
- process them and define symbols accordingly. Closes desc. */
+ if (pst->objfile->psymtabs == pst)
+ pst->objfile->psymtabs = pst->next;
+ else
+ for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
+ if (prev_pst->next == pst)
+ prev_pst->next = pst->next;
- read_dbx_symtab (desc, stringtab, hdr.a_syms / sizeof (struct nlist));
+ /* Next, put it on a free list for recycling */
- /* Sort symbols alphabetically within each block. */
+ pst->next = pst->objfile->free_psymtabs;
+ pst->objfile->free_psymtabs = pst;
+ }
+}
+\f
+static void
+dbx_psymtab_to_symtab_1 (pst)
+ struct partial_symtab *pst;
+{
+ struct cleanup *old_chain;
+ int i;
+
+ if (!pst)
+ return;
- sort_syms ();
+ if (pst->readin)
+ {
+ fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
+ }
- /* Go over the misc functions and install them in vector. */
+ /* 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 (" ", stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", stdout);
+ wrap_here ("");
+ printf_filtered ("%s...", pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output */
+ fflush (stdout);
+ }
+ dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
- condense_misc_bunches ();
+ 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);
+#ifdef GDB_TARGET_IS_HPPA
+ symbol_size = obj_dbx_symbol_entry_size (pst->objfile->obfd);
+#else
+ symbol_size = SYMBOL_SIZE (pst);
+#endif
- /* Don't allow char * to have a typename (else would get caddr_t.) */
+ /* Read in this file's symbols */
+ bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), L_SET);
+ pst->symtab =
+ read_ofile_symtab (pst->objfile, LDSYMOFF(pst), LDSYMLEN(pst),
+ pst->textlow, pst->texthigh - pst->textlow,
+ pst->section_offsets);
+ sort_symtab_syms (pst->symtab);
- TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
+ do_cleanups (old_chain);
+ }
- /* Make a default for file to list. */
+ pst->readin = 1;
+}
- select_source_symtab (symtab_list);
+/* Read in all of the symbols for a given psymtab for real.
+ Be verbose about it if the user wants that. */
- symfile = savestring (name, strlen (name));
+static void
+dbx_psymtab_to_symtab (pst)
+ struct partial_symtab *pst;
+{
+ bfd *sym_bfd;
- do_cleanups (old_chain);
+ if (!pst)
+ return;
- /* Free the symtabs made by read_symsegs, but not their contents,
- which have been copied into symtabs on symtab_list. */
- while (symseg_chain)
+ if (pst->readin)
{
- register struct symtab *s = symseg_chain->next;
- free (symseg_chain);
- symseg_chain = s;
+ fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
}
- printf ("done.\n");
- fflush (stdout);
-}
+ 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);
+ fflush (stdout);
+ }
-/* Return name of file symbols were loaded from, or 0 if none.. */
+ sym_bfd = pst->objfile->obfd;
-char *
-get_sym_file ()
-{
- return symfile;
+ 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");
+ }
}
-\f
-/* Given pointers to a a.out symbol table in core containing dbx style data,
- analyze them and create struct symtab's describing the symbols.
- NLISTLEN is the number of symbols in the symbol table.
- We read them one at a time using stdio.
- All symbol names are given as offsets relative to STRINGTAB. */
-static void
-read_dbx_symtab (desc, stringtab, nlistlen)
- int desc;
- register char *stringtab;
- register int nlistlen;
+/* Read in a defined section of a specific object file's symbols.
+
+ DESC is the file descriptor for the file, positioned at the
+ beginning of the symtab
+ SYM_OFFSET is the offset within the file of
+ the beginning of the symbols we want to read
+ SYM_SIZE is the size of the symbol info to read in.
+ TEXT_OFFSET is the beginning of the text segment we are reading symbols for
+ TEXT_SIZE is the size of the text segment read in.
+ SECTION_OFFSETS are the relocation offsets which get added to each symbol. */
+
+static struct symtab *
+read_ofile_symtab (objfile, sym_offset, sym_size, text_offset, text_size,
+ section_offsets)
+ struct objfile *objfile;
+ int sym_offset;
+ int sym_size;
+ CORE_ADDR text_offset;
+ int text_size;
+ struct section_offsets *section_offsets;
{
- FILE *stream = fdopen (desc, "r");
- struct nlist buf;
register char *namestring;
- register struct symbol *sym, *prev;
- int hash;
- int num_object_files = 0;
+ register struct internal_nlist *bufp;
+ unsigned char type;
+ unsigned max_symnum;
+ register bfd *abfd;
+ struct symtab *rtn;
+
+ current_objfile = objfile;
+ subfile_stack = NULL;
-#ifdef N_BINCL
- subfile_stack = 0;
+#ifdef GDB_TARGET_IS_HPPA
+ stringtab_global = HP_STRINGTAB (objfile);
+#else
+ stringtab_global = DBX_STRINGTAB (objfile);
#endif
+ last_source_file = NULL;
+
+ abfd = objfile->obfd;
+ symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
+ symbuf_end = symbuf_idx = 0;
- nlist_stream_global = stream;
- nlist_size_global = nlistlen;
- stringtab_global = stringtab;
- last_source_file = 0;
- bzero (global_sym_chain, sizeof global_sym_chain);
+ /* 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.
- for (symnum = 0; symnum < nlistlen; symnum++)
+ 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)
{
- fread (&buf, sizeof buf, 1, stream);
- namestring = buf.n_un.n_strx ? buf.n_un.n_strx + stringtab : "";
- if (buf.n_type & N_STAB)
- process_one_symbol (buf.n_type, buf.n_desc,
- buf.n_value, namestring);
- /* A static text symbol whose name ends in ".o"
- can only mean the start of another object file.
- So end the symtab of the source file we have been processing.
- This is how we avoid counting the libraries as part
- or the last source file.
- Also this way we find end of first object file (crt0). */
- else if (buf.n_type == N_TEXT
- && !strcmp (namestring + strlen (namestring) - 2, ".o"))
+ bfd_seek (symfile_bfd, sym_offset - symbol_size, L_INCR);
+ fill_symbuf (abfd);
+ bufp = &symbuf[symbuf_idx++];
+ SWAP_SYMBOL (bufp, abfd);
+
+ SET_NAMESTRING ();
+
+ processing_gcc_compilation = 0;
+ if (bufp->n_type == N_TEXT)
{
- if (num_object_files++ == 1)
- first_object_file_end = buf.n_value;
- if (last_source_file)
- end_symtab (buf.n_value);
+ if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
+ processing_gcc_compilation = 1;
+ else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
+ processing_gcc_compilation = 2;
}
- else if (buf.n_type & N_EXT || buf.n_type == N_TEXT)
+
+ /* Try to select a C++ demangling based on the compilation unit
+ producer. */
+
+ if (processing_gcc_compilation)
{
- int used_up = 0;
-
- /* Record the location of _etext. */
- if (buf.n_type == (N_TEXT | N_EXT)
- && !strcmp (namestring, "_etext"))
- end_of_text_addr = buf.n_value;
-
- /* Global symbol: see if we came across a dbx definition
- 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. */
- if (buf.n_type & N_EXT)
+#if 1 /* Works, but is experimental. -fnf */
+ if (AUTO_DEMANGLING)
{
- prev = 0;
-#ifdef NAMES_HAVE_UNDERSCORE
- hash = hashname (namestring + 1);
-#else /* not NAMES_HAVE_UNDERSCORE */
- hash = hashname (namestring);
-#endif /* not NAMES_HAVE_UNDERSCORE */
- for (sym = global_sym_chain[hash];
- sym;)
- {
- if (
-#ifdef NAMES_HAVE_UNDERSCORE
- *namestring == '_'
- && namestring[1] == SYMBOL_NAME (sym)[0]
- &&
- !strcmp (namestring + 2, SYMBOL_NAME (sym) + 1)
-#else /* NAMES_HAVE_UNDERSCORE */
- namestring[0] == SYMBOL_NAME (sym)[0]
- &&
- !strcmp (namestring + 1, SYMBOL_NAME (sym) + 1)
-#endif /* NAMES_HAVE_UNDERSCORE */
- )
- {
- if (prev)
- SYMBOL_VALUE (prev) = SYMBOL_VALUE (sym);
- else
- global_sym_chain[hash]
- = (struct symbol *) SYMBOL_VALUE (sym);
- SYMBOL_VALUE (sym) = buf.n_value;
- if (prev)
- sym = (struct symbol *) SYMBOL_VALUE (prev);
- else
- sym = global_sym_chain[hash];
-
- used_up = 1;
- }
- else
- {
- prev = sym;
- sym = (struct symbol *) SYMBOL_VALUE (sym);
- }
- }
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
}
-
- /* Defined global or text symbol: record as a misc function
- if it didn't give its address to a debugger symbol above. */
- if (buf.n_type <= (N_TYPE | N_EXT)
- && buf.n_type != N_EXT
- && ! used_up)
- record_misc_function (namestring, buf.n_value);
+#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, L_INCR);
+ processing_gcc_compilation = 0;
+ }
- if (last_source_file)
- end_symtab (end_of_text_addr);
-
- fclose (stream);
-}
-
-/* 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. */
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf (abfd);
+ bufp = &symbuf[symbuf_idx];
+ if (bufp->n_type != (unsigned char)N_SO)
+ error("First symbol in segment of executable not a source symbol");
-static char *
-next_symbol_text ()
-{
- struct nlist buf;
- fread (&buf, sizeof buf, 1, nlist_stream_global);
- symnum++;
- return buf.n_un.n_strx + stringtab_global;
-}
+ max_symnum = sym_size / symbol_size;
-static int
-hashname (name)
- char *name;
-{
- register char *p = name;
- register int total = p[0];
- register int c;
-
- c = p[1];
- total += c << 2;
- if (c)
+ for (symnum = 0;
+ symnum < max_symnum;
+ symnum++)
{
- c = p[2];
- total += c << 4;
- if (c)
- total += p[3] << 6;
- }
-
- return total % HASHSIZE;
-}
+ QUIT; /* Allow this to be interruptable */
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf(abfd);
+ bufp = &symbuf[symbuf_idx++];
+ SWAP_SYMBOL (bufp, abfd);
-/* Put all appropriate global symbols in the symseg data
- onto the hash chains so that their addresses will be stored
- when seen later in loader global symbols. */
+ type = bufp->n_type;
-static void
-hash_symsegs ()
-{
- /* Look at each symbol in each block in each symseg symtab. */
- struct symtab *s;
- for (s = symseg_chain; s; s = s->next)
- {
- register int n;
- for (n = BLOCKVECTOR_NBLOCKS (BLOCKVECTOR (s)) - 1; n >= 0; n--)
+ SET_NAMESTRING ();
+
+ if (type & N_STAB) {
+ process_one_symbol (type, bufp->n_desc, bufp->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)
{
- register struct block *b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), n);
- register int i;
- for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
+ /* 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. */
+
+ processing_gcc_compilation = 0;
+ if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
+ processing_gcc_compilation = 1;
+ else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
+ processing_gcc_compilation = 2;
+
+#if 1 /* Works, but is experimental. -fnf */
+ if (AUTO_DEMANGLING)
{
- register struct symbol *sym = BLOCK_SYM (b, i);
-
- /* Put the symbol on a chain if its value is an address
- that is figured out by the loader. */
-
- if (SYMBOL_CLASS (sym) == LOC_EXTERNAL)
- {
- register int hash = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE (sym) = (int) global_sym_chain[hash];
- global_sym_chain[hash] = sym;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- }
+ 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 pst->textlow is correct. */
+ if (last_source_start_addr == 0)
+ last_source_start_addr = text_offset;
+
+ rtn = end_symtab (text_offset + text_size, 0, 0, objfile);
+ end_stabs ();
+ return (rtn);
}
\f
-static void
-process_one_symbol (type, desc, value, name)
+/* 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.
+ 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 (type, desc, valu, name, section_offsets, objfile)
int type, desc;
- CORE_ADDR value;
+ CORE_ADDR valu;
char *name;
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
{
+#ifndef SUN_FIXED_LBRAC_BUG
+ /* 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;
+ char *colon_pos;
+
/* Something is wrong if we see real data before
seeing a source file name. */
-
-#ifdef N_NSYMS
- if (type == N_NSYMS) return;
-#endif
- if (type != N_SO && last_source_file == 0)
- error ("Invalid symbol data: does not start by identifying a source file.");
+ if (last_source_file == NULL && type != (unsigned char)N_SO)
+ {
+ /* Currently this ignores N_ENTRY on Gould machines, N_NSYM on machines
+ where that code is defined. */
+ if (IGNORE_SYMBOL (type))
+ return;
+
+ /* FIXME, this should not be an error, since it precludes extending
+ the symbol table information in this way... */
+ error ("Invalid symbol data: does not start by identifying a source file.");
+ }
switch (type)
{
case N_FUN:
case N_FNAME:
+#if 0
+/* It seems that the Sun ANSI C compiler (acc) replaces N_FUN with N_GSYM and
+ N_STSYM with a type code of f or F. Can't enable this until we get some
+ stuff straightened out with psymtabs. FIXME. */
+
+ case N_GSYM:
+ case N_STSYM:
+#endif /* 0 */
+
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+
/* Either of these types of symbols indicates the start of
a new function. We must process its "name" normally for dbx,
but also record the start of a new lexical context, and possibly
also the end of the lexical context for the previous function. */
- new = context_stack;
+ /* This is not always true. This type of symbol may indicate a
+ text segment variable. */
+
+ colon_pos = strchr (name, ':');
+ if (!colon_pos++
+ || (*colon_pos != 'f' && *colon_pos != 'F'))
+ {
+ define_symbol (valu, name, desc, type, objfile);
+ break;
+ }
+
+#ifndef SUN_FIXED_LBRAC_BUG
+ last_pc_address = valu; /* Save for SunOS bug circumcision */
+#endif
+
+#ifdef BLOCK_ADDRESS_FUNCTION_RELATIVE
+ /* On 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;
+#else
+ /* Default on ordinary systems */
+ function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT);
+#endif
+
within_function = 1;
- if (new)
+ 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, value);
- }
- else
- {
- new = (struct context_stack *) xmalloc (sizeof (struct context_stack));
- new->next = 0;
- new->depth = -1;
- context_stack = new;
+ new->start_addr, valu, objfile);
}
- new->locals = 0;
- new->old_blocks = pending_blocks;
- new->start_addr = value;
- new->name = define_symbol (value, name, desc);
- local_symbols = 0;
+ /* Stack must be empty now. */
+ if (context_stack_depth != 0)
+ complain (&lbrac_unmatched_complaint, (char *) symnum);
+
+ new = push_context (0, valu);
+ new->name = define_symbol (valu, name, desc, type, objfile);
break;
case N_LBRAC:
/* This "symbol" just indicates the start of an inner lexical
context within a function. */
- new = (struct context_stack *) xmalloc (sizeof (struct context_stack));
- new->depth = desc;
- new->next = context_stack;
- context_stack = new;
- new->locals = local_symbols;
- new->old_blocks = pending_blocks;
- new->start_addr = value;
- new->name = 0;
- local_symbols = 0;
+
+#if defined(BLOCK_ADDRESS_ABSOLUTE) || defined(BLOCK_ADDRESS_FUNCTION_RELATIVE)
+ /* Relocate for dynamic loading and 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;
+#endif
+
+#ifndef SUN_FIXED_LBRAC_BUG
+ if (valu < last_pc_address) {
+ /* Patch current LBRAC pc value to match last handy pc value */
+ complain (&lbrac_complaint, 0);
+ 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_RBRAC. */
- new = context_stack;
- if (new == 0 || desc != new->depth)
- error ("Invalid symbol data: N_LBRAC/N_RBRAC symbol mismatch, symtab pos %d.", symnum);
- local_symbols = new->locals;
- context_stack = new->next;
+ context that was started with N_LBRAC. */
+
+#if defined(BLOCK_ADDRESS_ABSOLUTE) || defined(BLOCK_ADDRESS_FUNCTION_RELATIVE)
+ /* Relocate for dynamic loading and 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;
+#endif
+
+ new = pop_context();
+ if (desc != new->depth)
+ complain (&lbrac_mismatch_complaint, (char *) 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 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. Defined the block for them.
If 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. */
- if (local_symbols && context_stack->next)
+ to be attached to the function's own block. However, if
+ it is so, we need to indicate that we just moved outside
+ of the function. */
+ if (local_symbols
+ && (context_stack_depth
+ > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)))
{
- /* Muzzle a compiler bug that makes end > start. */
- if (new->start_addr > value)
- new->start_addr = value;
+ /* FIXME Muzzle a compiler bug that makes end < start. */
+ if (new->start_addr > valu)
+ {
+ complain(&lbrac_rbrac_complaint, 0);
+ new->start_addr = valu;
+ }
/* Make a block for the local symbols within. */
finish_block (0, &local_symbols, new->old_blocks,
- new->start_addr + last_source_start_addr,
- value + last_source_start_addr);
+ new->start_addr, valu, objfile);
+ }
+ else
+ {
+ within_function = 0;
}
- free (new);
+ if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
+ /* Now pop locals of block just finished. */
+ local_symbols = new->locals;
break;
case N_FN:
- /* This kind of symbol supposedly indicates the start
- of an object file. In fact this type does not appear. */
+ 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);
break;
case N_SO:
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);
+
+#ifndef 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)
- end_symtab (value);
- start_symtab (name, value);
+ {
+ /* 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 == N_SO)
+ {
+ patch_subfile_names (current_subfile, name);
+ break; /* Ignore repeated SOs */
+ }
+ end_symtab (valu, 0, 0, objfile);
+ end_stabs ();
+ }
+ start_stabs ();
+ start_symtab (name, NULL, valu);
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.) */
- start_subfile (name);
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ start_subfile (name, current_subfile->dirname);
break;
-#ifdef N_BINCL
case N_BINCL:
push_subfile ();
- add_new_header_file (name, value);
- start_subfile (name);
+ add_new_header_file (name, valu);
+ start_subfile (name, current_subfile->dirname);
break;
case N_EINCL:
- start_subfile (pop_subfile ());
+ start_subfile (pop_subfile (), current_subfile->dirname);
break;
case N_EXCL:
- add_old_header_file (name, value);
+ add_old_header_file (name, valu);
break;
-#endif /* have N_BINCL */
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. */
- record_line (desc, value);
+ /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
+ valu += function_start_offset;
+#ifndef SUN_FIXED_LBRAC_BUG
+ last_pc_address = valu; /* Save for SunOS bug circumcision */
+#endif
+ record_line (current_subfile, desc, valu);
break;
- default:
- if (name)
- define_symbol (value, name, desc);
- }
-}
-\f
-static struct symbol *
-define_symbol (value, string, desc)
- int value;
- char *string;
- int desc;
-{
- register struct symbol *sym
- = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
- char *p = (char *) index (string, ':');
- int deftype;
- register int i;
+ case N_BCOMM:
+ if (common_block)
+ error ("Invalid symbol data: common within common at symtab pos %d",
+ symnum);
+ common_block = local_symbols;
+ common_block_i = local_symbols ? local_symbols->nsyms : 0;
+ break;
- bzero (sym, sizeof (struct symbol));
- SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, string, p - string);
- p++;
- /* Determine the type of name being defined. */
- if ((*p >= '0' && *p <= '9') || *p == '(')
- deftype = 'l';
- else
- deftype = *p++;
+ case N_ECOMM:
+ /* Symbols declared since the BCOMM are to have the common block
+ start address added in when we know it. common_block points to
+ the first symbol after the BCOMM in the local_symbols list;
+ copy the list and hang it off the symbol for the common block name
+ for later fixup. */
+ {
+ int i;
+ struct symbol *sym =
+ (struct symbol *) xmmalloc (objfile -> md, sizeof (struct symbol));
+ memset (sym, 0, sizeof *sym);
+ SYMBOL_NAME (sym) = savestring (name, strlen (name));
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
+ SYMBOL_NAMESPACE (sym) = (enum namespace)((long)
+ copy_pending (local_symbols, common_block_i, common_block));
+ i = hashname (SYMBOL_NAME (sym));
+ SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
+ global_sym_chain[i] = sym;
+ common_block = 0;
+ break;
+ }
- /* c is a special case, not followed by a type-number.
- SYMBOL:c=iVALUE for an integer constant symbol.
- SYMBOL:c=rVALUE for a floating constant symbol. */
- if (deftype == 'c')
- {
- if (*p++ != '=')
- error ("Invalid symbol data at symtab pos %d.", symnum);
- switch (*p++)
- {
- case 'r':
- {
- double d = atof (p);
- char *value;
-
- SYMBOL_TYPE (sym) = builtin_type_double;
- value = (char *) obstack_alloc (symbol_obstack, sizeof (double));
- bcopy (&d, value, sizeof (double));
- SYMBOL_VALUE_BYTES (sym) = value;
- SYMBOL_CLASS (sym) = LOC_CONST;
- }
- break;
- case 'i':
+ /* 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. FIXME.
+ Solaris2's stabs-in-coff makes *most* symbols relative
+ but leaves a few absolute. 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;
+ p = strchr (name, ':');
+ if (p != 0 && p[1] == 'S')
{
- SYMBOL_TYPE (sym) = builtin_type_int;
- SYMBOL_VALUE (sym) = atoi (p);
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
+ /* FIXME! We relocate it by the TEXT offset, in case the
+ whole module moved in memory. But this is wrong, since
+ the sections can side around independently. */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ goto define_a_symbol;
}
- break;
- default:
- error ("Invalid symbol data at symtab pos %d.", symnum);
+ /* 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: abort();
}
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- return sym;
- }
-
- /* Now usually comes a number that says which data type,
- and possibly more stuff to define the type
- (all of which is handled by read_type) */
-
- if (deftype == 'p' && *p == 'F')
- /* pF is a two-letter code that means a function parameter in Fortran.
- The type-number specifies the type of the return value.
- Translate it into a pointer-to-function type. */
- {
- p++;
- SYMBOL_TYPE (sym)
- = lookup_pointer_type (lookup_function_type (read_type (&p)));
- }
- else
- SYMBOL_TYPE (sym) = read_type (&p);
-
- switch (deftype)
- {
- case 'f':
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'F':
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- case 'G':
- /* For a class G (global) symbol, it appears that the
- value is not correct. It is necessary to search for the
- corresponding linker definition to find the value.
- These definitions appear at the end of the namelist. */
- i = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE (sym) = (int) global_sym_chain[i];
- global_sym_chain[i] = sym;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- /* This case is faked by a conditional above,
- when there is no code letter in the dbx data.
- Dbx data never actually contains 'l'. */
- case 'l':
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'p':
- SYMBOL_CLASS (sym) = LOC_ARG;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- /* DESC == 0 implies compiled with GCC.
- In this case, if it says `short', believe it. */
- if (desc == 0)
- break;
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- if (SYMBOL_TYPE (sym) == builtin_type_char
- || SYMBOL_TYPE (sym) == builtin_type_short)
- SYMBOL_TYPE (sym) = builtin_type_int;
- else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_short)
- SYMBOL_TYPE (sym) = builtin_type_unsigned_int;
- break;
-
- case 'r':
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'S':
- /* Static symbol at top level of file */
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 't':
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym)) = concat (SYMBOL_NAME (sym), "", "");
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'T':
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym))
- = concat ("",
- (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_ENUM
- ? "enum "
- : (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- ? "struct " : "union ")),
- SYMBOL_NAME (sym));
- add_symbol_to_list (sym, &file_symbols);
- break;
+ }
- case 'V':
- case 'v':
- /* Static symbol of local scope */
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
+ case_N_STSYM: /* Static symbol in data seg */
+ case N_DSLINE: /* Source line number, data seg */
+ valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
+ 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);
+ goto define_a_symbol;
+
+ case_N_ROSYM: /* Static symbol in Read-only data seg */
+ valu += ANOFFSET (section_offsets, SECT_OFF_RODATA);
+ goto define_a_symbol;
+
+ case N_ENTRY: /* Alternate entry point */
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ goto define_a_symbol;
+
+ /* 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)
+ define_symbol (valu, name, desc, type, objfile);
break;
- default:
- error ("Invalid symbol data: unknown symbol-type code `%c' at symtab pos %d.", deftype, symnum);
- }
- return sym;
-}
-\f
-/* Read a number by which a type is referred to in dbx data,
- or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
- Just a single number N is equivalent to (0,N).
- Return the two numbers by storing them in the vector TYPENUMS.
- TYPENUMS will then be used as an argument to dbx_lookup_type. */
-
-static void
-read_type_number (pp, typenums)
- register char **pp;
- register int *typenums;
-{
- if (**pp == '(')
- {
- (*pp)++;
- typenums[0] = read_number (pp, ',');
- typenums[1] = read_number (pp, ')');
- }
- else
- {
- typenums[0] = 0;
- typenums[1] = read_number (pp, 0);
- }
-}
-
-/* Read a dbx type reference or definition;
- return the type that is meant.
- This can be just a number, in which case it references
- a type already defined and placed in type_vector.
- Or the number can be followed by an =, in which case
- it means to define a new type according to the text that
- follows the =. */
-
-static
-struct type *
-read_type (pp)
- register char **pp;
-{
- register struct type *type = 0;
- register int n;
- struct type *type1;
- int typenums[2];
- int xtypenums[2];
-
- read_type_number (pp, typenums);
-
- /* Detect random reference to type not yet defined.
- Allocate a type object but leave it zeroed. */
- if (**pp != '=')
- return dbx_alloc_type (typenums);
-
- *pp += 2;
- switch ((*pp)[-1])
- {
- case 'x':
- type = dbx_alloc_type (typenums);
- /* Set the type code according to the following letter. */
- switch ((*pp)[0])
+ /* 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)
{
- case 's':
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- break;
- case 'u':
- TYPE_CODE (type) = TYPE_CODE_UNION;
- break;
- case 'e':
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- break;
+ if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
+ {
+ processing_gcc_compilation = 2;
+#if 1 /* Works, but is experimental. -fnf */
+ if (AUTO_DEMANGLING)
+ {
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
+ }
+#endif
+ }
}
- /* Skip the name the cross-ref points to. */
- *pp = (char *) index (*pp, ',');
- /* Just allocate the type and leave it zero if nothing known */
- return dbx_alloc_type (typenums);
-
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '(':
- (*pp)--;
- read_type_number (pp, xtypenums);
- type = *dbx_lookup_type (xtypenums);
- if (type == 0)
- type = builtin_type_void;
- *dbx_lookup_type (typenums) = type;
- break;
-
- case '*':
- type = dbx_alloc_type (typenums);
- smash_to_pointer_type (type, read_type (pp));
- break;
-
- case 'f':
- type = dbx_alloc_type (typenums);
- smash_to_function_type (type, read_type (pp));
- break;
-
- case 'r':
- type = read_range_type (pp, typenums);
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 'e':
- type = dbx_alloc_type (typenums);
- type = read_enum_type (pp, type);
- *dbx_lookup_type (typenums) = type;
break;
- case 's':
- type = dbx_alloc_type (typenums);
- type = read_struct_type (pp, type);
+ /* 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_MAIN: /* Name of main routine. */
break;
-
- case 'u':
- type = dbx_alloc_type (typenums);
- type = read_struct_type (pp, type);
- TYPE_CODE (type) = TYPE_CODE_UNION;
- break;
-
- case 'a':
- /* Define an array type. */
- type = dbx_alloc_type (typenums);
-
- /* dbx expresses array types in terms of a range type for the index,
- and that range type is specified right inside the array type spec
- making ar1;MIN;MAX;VALTYPE */
- if (!strncmp (*pp, "r1;0;", 5))
- (*pp) += 5;
- else if (!strncmp (*pp, "r(0,1);0;", 9))
- (*pp) += 9;
- else break;
-
- TYPE_CODE (type) = TYPE_CODE_ARRAY;
- /* In Fortran, an upper bound may be T... meaning a parameter specifies
- the length of the data. In this case, just pretend the bound is 1.
- This happens only for array parameters, which are really passed
- as pointers anyway, and we will translate them into such. */
- if (**pp == 'T')
- {
- n = 1;
- while (**pp != ';')
- (*pp)++;
- }
- else
- n = read_number (pp, ';') + 1;
- TYPE_TARGET_TYPE (type) = read_type (pp);
- TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)) * n;
- break;
-
+
+ /* The following symbol types we don't know how to process. Handle
+ them in a "default" way, but complain to people who care. */
default:
- error ("Invalid symbol data: unrecognized type-code `%c' at symtab pos %d.",
- (*pp)[-1], symnum);
+ 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));
+ if (name)
+ define_symbol (valu, name, desc, type, objfile);
}
- if (type == 0)
- abort ();
-
-#if 0
- /* If this is an overriding temporary alteration for a header file's
- contents, and this type number is unknown in the global definition,
- put this type into the global definition at this type number. */
- if (header_file_prev_index >= 0)
- {
- register struct type **tp
- = explicit_lookup_type (header_file_prev_index, typenums[1]);
- if (*tp == 0)
- *tp = type;
- }
-#endif
- return type;
+ previous_stab_code = type;
}
\f
-/* This page contains subroutines of read_type. */
-
-/* Read the description of a structure (or union type)
- and return an object describing the type. */
-
-static struct type *
-read_struct_type (pp, type)
- char **pp;
- register struct type *type;
+/* Copy a pending list, used to record the contents of a common
+ block for later fixup. */
+static struct pending *
+copy_pending (beg, begi, end)
+ struct pending *beg;
+ int begi;
+ struct pending *end;
{
- struct nextfield
- {
- struct nextfield *next;
- struct field field;
- };
-
- register struct nextfield *list = 0;
- struct nextfield *new;
- int totalsize;
- char *name;
- register char *p;
- int nfields = 0;
- register int n;
-
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
-
- /* First comes the total size in bytes. */
-
- TYPE_LENGTH (type) = read_number (pp, 0);
-
- /* Now come the fields, as NAME:TYPENUM,BITPOS,BITSIZE; for each one.
- At the end, we see a semicolon instead of a field. */
+ struct pending *new = 0;
+ struct pending *next;
- while (**pp != ';')
+ for (next = beg; next != 0 && (next != end || begi < end->nsyms);
+ next = next->next, begi = 0)
{
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\')
- *pp = next_symbol_text ();
-
- /* Get space to record the next field's data. */
- new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new->next = list;
- list = new;
-
- /* Read the data. */
- p = *pp;
- while (*p != ':') p++;
- list->field.name = savestring (*pp, p - *pp);
- *pp = p + 1;
- list->field.type = read_type (pp);
- if (**pp != ',')
- error ("Invalid symbol data: bad structure-type format at symtab pos %d.",
- symnum);
- (*pp)++; /* Skip the comma. */
- list->field.bitpos = read_number (pp, ',');
- list->field.bitsize = read_number (pp, ';');
- /* Detect an unpacked field and mark it as such.
- dbx gives a bit size for all fields.
- Also detect forward refs to structures and unions,
- and treat enums as if they had the width of ints. */
- if ((list->field.bitsize == 8 * TYPE_LENGTH (list->field.type)
- || TYPE_CODE (list->field.type) == TYPE_CODE_STRUCT
- || TYPE_CODE (list->field.type) == TYPE_CODE_UNION
- || (TYPE_CODE (list->field.type) == TYPE_CODE_ENUM
- && list->field.bitsize == 8 * TYPE_LENGTH (builtin_type_int)))
- &&
- list->field.bitpos % 8 == 0)
- list->field.bitsize = 0;
- nfields++;
+ register int j;
+ for (j = begi; j < next->nsyms; j++)
+ add_symbol_to_list (next->symbol[j], &new);
}
-
- (*pp)++; /* Skip the terminating ';'. */
-
- /* Now create the vector of fields, and record how big it is. */
-
- TYPE_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack,
- sizeof (struct field) * nfields);
-
- /* Copy the saved-up fields into the field vector. */
-
- for (n = nfields; list; list = list->next)
- TYPE_FIELD (type, --n) = list->field;
-
- return type;
+ return new;
}
+\f
+/* 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. */
-/* Read a definition of an enumeration type,
- and create and return a suitable type object.
- Also defines the symbols that represent the values of the type. */
-
-static struct type *
-read_enum_type (pp, type)
- register char **pp;
- register struct type *type;
+void
+elfstab_build_psymtabs (objfile, section_offsets, mainline,
+ staboffset, stabsize,
+ stabstroffset, stabstrsize)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+ unsigned int staboffset;
+ unsigned int stabsize;
+ unsigned int stabstroffset;
+ unsigned int stabstrsize;
{
- register char *p;
- char *name;
- register long n;
- register struct symbol *sym;
- int nsyms = 0;
- struct pending **symlist;
- struct pending *osyms, *syms;
-
- if (within_function)
- symlist = &local_symbols;
- else
- symlist = &file_symbols;
- osyms = *symlist;
-
- /* Read the value-names and their values.
- The input syntax is NAME:VALUE,NAME:VALUE, and so on.
- A semicolon instead of a NAME means the end. */
- while (**pp && **pp != ';')
- {
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\')
- *pp = next_symbol_text ();
-
- p = *pp;
- while (*p != ':') p++;
- name = savestring (*pp, p - *pp);
- *pp = p + 1;
- n = read_number (pp, ',');
-
- sym = (struct symbol *) xmalloc (sizeof (struct symbol));
- bzero (sym, sizeof (struct symbol));
- SYMBOL_NAME (sym) = name;
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_VALUE (sym) = n;
- add_symbol_to_list (sym, symlist);
- nsyms++;
- }
+ 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 = (struct dbx_symfile_info *) objfile->sym_private;
+
+ DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
+ if (!DBX_TEXT_SECT (objfile))
+ error ("Can't find .text section in symbol file");
+
+#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 < 0) /* FIXME: stabstrsize is unsigned; never true! */
+ error ("ridiculous string table size: %d bytes", stabstrsize);
+ DBX_STRINGTAB (objfile) = (char *)
+ obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1);
- (*pp)++; /* Skip the semicolon. */
+ /* Now read in the string table in one big gulp. */
- /* Now fill in the fields of the type-structure. */
+ val = bfd_seek (sym_bfd, stabstroffset, L_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
+ if (val != stabstrsize)
+ perror_with_name (name);
- TYPE_LENGTH (type) = sizeof (int);
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- TYPE_NFIELDS (type) = nsyms;
- TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms);
+ stabsread_new_init ();
+ buildsym_new_init ();
+ free_header_files ();
+ init_header_files ();
+ install_minimal_symbols (objfile);
- /* Find the symbols for the values and put them into the type.
- The symbols can be found in the symlist that we put them on
- to cause them to be defined. osyms contains the old value
- of that symlist; everything up to there was defined by us. */
+ processing_acc_compilation = 1;
- for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next)
- {
- SYMBOL_TYPE (syms->symbol) = type;
- TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol);
- TYPE_FIELD_VALUE (type, n) = SYMBOL_VALUE (syms->symbol);
- TYPE_FIELD_BITPOS (type, n) = 0;
- TYPE_FIELD_BITSIZE (type, n) = 0;
- }
-
- return type;
+ /* 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, section_offsets, 0);
}
-
-static struct type *
-read_range_type (pp, typenums)
- char **pp;
- int typenums[2];
-{
- char *errp = *pp;
- int rangenums[2];
- int n1, n2, n3;
-
- /* First comes a type we are a subrange of.
- In practice it is usually 0, 1 or the type being defined. */
- read_type_number (pp, rangenums);
- n1 = rangenums[1];
-
- /* A semicolon should now follow; skip it. */
- if (**pp == ';')
- (*pp)++;
-
- /* The remaining two operands are usually lower and upper bounds
- of the range. But in some special cases they mean something else. */
- n2 = read_number (pp, ';');
- n3 = read_number (pp, ';');
-
- /* A type defined as a subrange of itself, with bounds both 0, is void. */
- if (rangenums[0] == typenums[0] && rangenums[1] == typenums[1]
- && n2 == 0 && n3 == 0)
- return builtin_type_void;
-
- /* If n3 is zero and n2 is not, we want a floating type,
- and n2 is the width in bytes.
-
- Fortran programs appear to use this for complex types also,
- and they give no way to distinguish between double and single-complex!
- We don't have complex types, so we would lose on all fortran files!
- So return type `double' for all of those. It won't work right
- for the complex values, but at least it makes the file loadable. */
-
- if (n3 == 0 && n2 > 0)
- {
- if (n2 == sizeof (float))
- return builtin_type_float;
- return builtin_type_double;
- }
-
- /* If the upper bound is -1, it must really be an unsigned int. */
-
- else if (n2 == 0 && n3 == -1)
- {
- if (sizeof (int) == sizeof (long))
- return builtin_type_unsigned_int;
- else
- return builtin_type_unsigned_long;
- }
-
- /* Detect unsigned subranges of int. Int is normally 1.
- Note that `char' is usually given bounds of 0 to 127,
- and would therefore appear unsigned; but it is described
- as a subrange of itself, so we reject it here. */
+\f
+/* Parse the user's idea of an offset for dynamic linking, into our idea
+ of how to represent it for fast symbol reading. */
- else if (n2 == 0 && n1 == 1)
- {
- /* an unsigned type */
- if (n3 == (1 << (8 * sizeof (int))) - 1)
- return builtin_type_unsigned_int;
- if (n3 == (1 << (8 * sizeof (short))) - 1)
- return builtin_type_unsigned_short;
- if (n3 == (1 << (8 * sizeof (char))) - 1)
- return builtin_type_unsigned_char;
- }
- else
- {
- /* a signed type */
- if (n3 == (1 << (8 * sizeof (int) - 1)) - 1)
- return builtin_type_int;
- if (n3 == (1 << (8 * sizeof (long) - 1)) - 1)
- return builtin_type_long;
- if (n3 == (1 << (8 * sizeof (short) - 1)) - 1)
- return builtin_type_short;
- if (n3 == (1 << (8 * sizeof (char) - 1)) - 1)
- return builtin_type_char;
- }
- error ("Invalid symbol data: range type spec %s at symtab pos %d.",
- errp - 1, symnum);
+struct section_offsets *
+dbx_symfile_offsets (objfile, addr)
+ struct objfile *objfile;
+ CORE_ADDR addr;
+{
+ struct section_offsets *section_offsets;
+ int i;
+
+ section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile -> psymbol_obstack,
+ sizeof (struct section_offsets) +
+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
+
+ for (i = 0; i < SECT_OFF_MAX; i++)
+ ANOFFSET (section_offsets, i) = addr;
+
+ return section_offsets;
}
-
-/* Read a number from the string pointed to by *PP.
- The value of *PP is advanced over the number.
- If END is nonzero, the character that ends the
- number must match END, or an error happens;
- and that character is skipped if it does match.
- If END is zero, *PP is left pointing to that character. */
-
-static long
-read_number (pp, end)
- char **pp;
- int end;
+\f
+/* Register our willingness to decode symbols for SunOS and a.out and
+ b.out files handled by BFD... */
+static struct sym_fns sunos_sym_fns =
{
- register char *p = *pp;
- register long n = 0;
- register int c;
- int sign = 1;
-
- /* Handle an optional leading minus sign. */
-
- if (*p == '-')
- {
- sign = -1;
- p++;
- }
-
- /* Read the digits, as far as they go. */
+ "sunOs", /* sym_name: name or name prefix of BFD target type */
+ 6, /* sym_namelen: number of significant sym_name chars */
+ 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 */
+ dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
- while ((c = *p++) >= '0' && c <= '9')
- {
- n *= 10;
- n += c - '0';
- }
- if (end)
- {
- if (c != end)
- error ("Invalid symbol data: invalid character \\%03o at symbol pos %d.", c, symnum);
- }
- else
- --p;
+static struct sym_fns aout_sym_fns =
+{
+ "a.out", /* sym_name: name or name prefix of BFD target type */
+ 5, /* sym_namelen: number of significant sym_name chars */
+ 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 */
+ dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
- *pp = p;
- return n * sign;
-}
+static struct sym_fns bout_sym_fns =
+{
+ "b.out", /* sym_name: name or name prefix of BFD target type */
+ 5, /* sym_namelen: number of significant sym_name chars */
+ 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 */
+ dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
-static
-initialize ()
+/* This is probably a mistake. FIXME. Why can't the HP's use an ordinary
+ file format name with an -hppa suffix? */
+static struct sym_fns hppa_sym_fns =
{
- symfile = 0;
+ "hppa", /* sym_name: name or name prefix of BFD target type */
+ 4, /* sym_namelen: number of significant sym_name chars */
+ 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 */
+ dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
- add_com ("symbol-file", class_files, symbol_file_command,
- "Load symbol table (in dbx format) from executable file FILE.");
+void
+_initialize_dbxread ()
+{
+ add_symtab_fns(&sunos_sym_fns);
+ add_symtab_fns(&aout_sym_fns);
+ add_symtab_fns(&bout_sym_fns);
+ add_symtab_fns(&hppa_sym_fns);
}
-
-END_FILE
-
-#endif /* READ_DBX_FORMAT */
projects / deliverable / binutils-gdb.git / blobdiff