2064 lines
56 KiB
C
2064 lines
56 KiB
C
/* Read coff symbol tables and convert to internal format, for GDB.
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Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
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Copyright 1987, 1988, 1989, 1990, 1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "defs.h"
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#include "symtab.h"
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#include "breakpoint.h"
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#include "bfd.h"
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#include "symfile.h"
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#include <obstack.h>
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#include <string.h>
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#include "coff/internal.h" /* Internal format of COFF symbols in BFD */
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#include "libcoff.h" /* FIXME secret internal data from BFD */
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static void add_symbol_to_list ();
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static void read_coff_symtab ();
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static void patch_opaque_types ();
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static struct type *decode_function_type ();
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static struct type *decode_type ();
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static struct type *decode_base_type ();
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static struct type *read_enum_type ();
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static struct type *read_struct_type ();
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static void finish_block ();
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static struct blockvector *make_blockvector ();
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static struct symbol *process_coff_symbol ();
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static int init_stringtab ();
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static void free_stringtab ();
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static char *getfilename ();
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static char *getsymname ();
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static int init_lineno ();
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static void enter_linenos ();
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static void read_one_sym ();
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extern int fclose ();
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/* To be an sdb debug type, type must have at least a basic or primary
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derived type. Using this rather than checking against T_NULL is
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said to prevent core dumps if we try to operate on Michael Bloom
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dbx-in-coff file. */
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#define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
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/*
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* Convert from an sdb register number to an internal gdb register number.
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* This should be defined in tm.h, if REGISTER_NAMES is not set up
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* to map one to one onto the sdb register numbers.
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*/
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#ifndef SDB_REG_TO_REGNUM
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# define SDB_REG_TO_REGNUM(value) (value)
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#endif
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/* Name of source file whose symbol data we are now processing.
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This comes from a symbol named ".file". */
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static char *last_source_file;
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/* Core address of start and end of text of current source file.
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This comes from a ".text" symbol where x_nlinno > 0. */
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static CORE_ADDR cur_src_start_addr;
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static CORE_ADDR cur_src_end_addr;
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/* Core address of the end of the first object file. */
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static CORE_ADDR first_object_file_end;
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/* The addresses of the symbol table stream and number of symbols
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of the object file we are reading (as copied into core). */
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static FILE *nlist_stream_global;
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static int nlist_nsyms_global;
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/* The index in the symbol table of the last coff symbol that was processed. */
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static int symnum;
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/* Vector of types defined so far, indexed by their coff symnum. */
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static struct type **type_vector;
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/* Number of elements allocated for type_vector currently. */
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static int type_vector_length;
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/* Vector of line number information. */
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static struct linetable *line_vector;
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/* Index of next entry to go in line_vector_index. */
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static int line_vector_index;
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/* Last line number recorded in the line vector. */
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static int prev_line_number;
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/* Number of elements allocated for line_vector currently. */
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static int line_vector_length;
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/* Pointers to scratch storage, used for reading raw symbols and auxents. */
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static char *temp_sym;
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static char *temp_aux;
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/* Local variables that hold the shift and mask values for the
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COFF file that we are currently reading. These come back to us
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from BFD, and are referenced by their macro names, as well as
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internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
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macros from ../internalcoff.h . */
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static unsigned local_n_btmask;
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static unsigned local_n_btshft;
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static unsigned local_n_tmask;
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static unsigned local_n_tshift;
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#define N_BTMASK local_n_btmask
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#define N_BTSHFT local_n_btshft
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#define N_TMASK local_n_tmask
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#define N_TSHIFT local_n_tshift
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/* Local variables that hold the sizes in the file of various COFF structures.
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(We only need to know this to read them from the file -- BFD will then
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translate the data in them, into `internal_xxx' structs in the right
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byte order, alignment, etc.) */
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static unsigned local_linesz;
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static unsigned local_symesz;
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static unsigned local_auxesz;
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/* Chain of typedefs of pointers to empty struct/union types.
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They are chained thru the SYMBOL_VALUE_CHAIN. */
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#define HASHSIZE 127
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static struct symbol *opaque_type_chain[HASHSIZE];
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/* Record the symbols defined for each context in a list.
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We don't create a struct block for the context until we
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know how long to make it. */
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struct pending
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{
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struct pending *next;
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struct symbol *symbol;
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};
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/* Here are the three lists that symbols are put on. */
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struct pending *file_symbols; /* static at top level, and types */
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struct pending *global_symbols; /* global functions and variables */
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struct pending *local_symbols; /* everything local to lexical context */
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/* List of unclosed lexical contexts
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(that will become blocks, eventually). */
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struct context_stack
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{
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struct context_stack *next;
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struct pending *locals;
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struct pending_block *old_blocks;
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struct symbol *name;
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CORE_ADDR start_addr;
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int depth;
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};
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struct context_stack *context_stack;
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/* Nonzero if within a function (so symbols should be local,
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if nothing says specifically). */
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int within_function;
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#if 0
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/* The type of the function we are currently reading in. This is
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used by define_symbol to record the type of arguments to a function. */
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struct type *in_function_type;
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#endif
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/* List of blocks already made (lexical contexts already closed).
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This is used at the end to make the blockvector. */
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struct pending_block
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{
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struct pending_block *next;
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struct block *block;
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};
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struct pending_block *pending_blocks;
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extern CORE_ADDR startup_file_start; /* From blockframe.c */
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extern CORE_ADDR startup_file_end; /* From blockframe.c */
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/* Complaints about various problems in the file being read */
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struct complaint ef_complaint =
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{"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0};
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struct complaint bf_no_aux_complaint =
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{"`.bf' symbol %d has no aux entry", 0, 0};
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struct complaint ef_no_aux_complaint =
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{"`.ef' symbol %d has no aux entry", 0, 0};
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struct complaint lineno_complaint =
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{"Line number pointer %d lower than start of line numbers", 0, 0};
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struct complaint unexpected_type_complaint =
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{"Unexpected type for symbol %s", 0, 0};
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struct complaint bad_sclass_complaint =
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{"Bad n_sclass for symbol %s", 0, 0};
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/* Look up a coff type-number index. Return the address of the slot
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where the type for that index is stored.
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The type-number is in INDEX.
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This can be used for finding the type associated with that index
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or for associating a new type with the index. */
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static struct type **
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coff_lookup_type (index)
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register int index;
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{
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if (index >= type_vector_length)
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{
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int old_vector_length = type_vector_length;
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type_vector_length *= 2;
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if (type_vector_length < index) {
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type_vector_length = index * 2;
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}
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type_vector = (struct type **)
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xrealloc (type_vector, type_vector_length * sizeof (struct type *));
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bzero (&type_vector[old_vector_length],
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(type_vector_length - old_vector_length) * sizeof(struct type *));
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}
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return &type_vector[index];
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}
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/* Make sure there is a type allocated for type number index
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and return the type object.
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This can create an empty (zeroed) type object. */
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static struct type *
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coff_alloc_type (index)
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int index;
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{
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register struct type **type_addr = coff_lookup_type (index);
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register struct type *type = *type_addr;
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/* If we are referring to a type not known at all yet,
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allocate an empty type for it.
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We will fill it in later if we find out how. */
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if (type == 0)
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{
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type = (struct type *) obstack_alloc (symbol_obstack,
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sizeof (struct type));
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bzero (type, sizeof (struct type));
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TYPE_VPTR_FIELDNO (type) = -1;
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*type_addr = type;
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}
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return type;
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}
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/* maintain the lists of symbols and blocks */
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/* Add a symbol to one of the lists of symbols. */
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static void
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add_symbol_to_list (symbol, listhead)
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struct symbol *symbol;
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struct pending **listhead;
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{
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register struct pending *link
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= (struct pending *) xmalloc (sizeof (struct pending));
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link->next = *listhead;
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link->symbol = symbol;
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*listhead = link;
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}
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/* Take one of the lists of symbols and make a block from it.
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Put the block on the list of pending blocks. */
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static void
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finish_block (symbol, listhead, old_blocks, start, end)
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struct symbol *symbol;
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struct pending **listhead;
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struct pending_block *old_blocks;
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CORE_ADDR start, end;
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{
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register struct pending *next, *next1;
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register struct block *block;
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register struct pending_block *pblock;
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struct pending_block *opblock;
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register int i;
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/* Count the length of the list of symbols. */
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for (next = *listhead, i = 0; next; next = next->next, i++);
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block = (struct block *)
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obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *));
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/* Copy the symbols into the block. */
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BLOCK_NSYMS (block) = i;
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for (next = *listhead; next; next = next->next)
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BLOCK_SYM (block, --i) = next->symbol;
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BLOCK_START (block) = start;
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BLOCK_END (block) = end;
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BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */
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/* Put the block in as the value of the symbol that names it. */
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if (symbol)
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{
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SYMBOL_BLOCK_VALUE (symbol) = block;
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BLOCK_FUNCTION (block) = symbol;
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}
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else
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BLOCK_FUNCTION (block) = 0;
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/* Now free the links of the list, and empty the list. */
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for (next = *listhead; next; next = next1)
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{
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next1 = next->next;
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free (next);
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}
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*listhead = 0;
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/* Install this block as the superblock
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of all blocks made since the start of this scope
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that don't have superblocks yet. */
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opblock = 0;
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for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
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{
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if (BLOCK_SUPERBLOCK (pblock->block) == 0)
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BLOCK_SUPERBLOCK (pblock->block) = block;
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opblock = pblock;
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}
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/* Record this block on the list of all blocks in the file.
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Put it after opblock, or at the beginning if opblock is 0.
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This puts the block in the list after all its subblocks. */
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pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block));
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pblock->block = block;
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if (opblock)
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{
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pblock->next = opblock->next;
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opblock->next = pblock;
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}
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else
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{
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pblock->next = pending_blocks;
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pending_blocks = pblock;
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}
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}
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static struct blockvector *
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make_blockvector ()
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{
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register struct pending_block *next, *next1;
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register struct blockvector *blockvector;
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register int i;
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/* Count the length of the list of blocks. */
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for (next = pending_blocks, i = 0; next; next = next->next, i++);
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blockvector = (struct blockvector *)
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obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *));
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/* Copy the blocks into the blockvector.
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This is done in reverse order, which happens to put
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the blocks into the proper order (ascending starting address).
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finish_block has hair to insert each block into the list
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after its subblocks in order to make sure this is true. */
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BLOCKVECTOR_NBLOCKS (blockvector) = i;
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for (next = pending_blocks; next; next = next->next)
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BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
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/* Now free the links of the list, and empty the list. */
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for (next = pending_blocks; next; next = next1)
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{
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next1 = next->next;
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free (next);
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}
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pending_blocks = 0;
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return blockvector;
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}
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/* Manage the vector of line numbers. */
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static void
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record_line (line, pc)
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int line;
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CORE_ADDR pc;
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{
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struct linetable_entry *e;
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/* Make sure line vector is big enough. */
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if (line_vector_index + 2 >= line_vector_length)
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{
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line_vector_length *= 2;
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line_vector = (struct linetable *)
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xrealloc (line_vector, sizeof (struct linetable)
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+ (line_vector_length
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* sizeof (struct linetable_entry)));
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}
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e = line_vector->item + line_vector_index++;
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e->line = line; e->pc = pc;
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}
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/* Start a new symtab for a new source file.
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This is called when a COFF ".file" symbol is seen;
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it indicates the start of data for one original source file. */
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static void
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start_symtab ()
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{
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file_symbols = 0;
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global_symbols = 0;
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context_stack = 0;
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within_function = 0;
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last_source_file = 0;
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||
|
||
/* Initialize the source file line number information for this file. */
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||
|
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if (line_vector) /* Unlikely, but maybe possible? */
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free (line_vector);
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line_vector_index = 0;
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line_vector_length = 1000;
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prev_line_number = -2; /* Force first line number to be explicit */
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line_vector = (struct linetable *)
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xmalloc (sizeof (struct linetable)
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+ line_vector_length * sizeof (struct linetable_entry));
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}
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||
|
||
/* Save the vital information from when starting to read a file,
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||
for use when closing off the current file.
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||
NAME is the file name the symbols came from, START_ADDR is the first
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text address for the file, and SIZE is the number of bytes of text. */
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||
|
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static void
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||
complete_symtab (name, start_addr, size)
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char *name;
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CORE_ADDR start_addr;
|
||
unsigned int size;
|
||
{
|
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last_source_file = savestring (name, strlen (name));
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cur_src_start_addr = start_addr;
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cur_src_end_addr = start_addr + size;
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||
|
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if (entry_point < cur_src_end_addr
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||
&& entry_point >= cur_src_start_addr)
|
||
{
|
||
startup_file_start = cur_src_start_addr;
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||
startup_file_end = cur_src_end_addr;
|
||
}
|
||
}
|
||
|
||
/* Finish the symbol definitions for one main source file,
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||
close off all the lexical contexts for that file
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||
(creating struct block's for them), then make the
|
||
struct symtab for that file and put it in the list of all such. */
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||
|
||
static void
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||
end_symtab (objfile)
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||
struct objfile *objfile;
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||
{
|
||
register struct symtab *symtab;
|
||
register struct context_stack *cstk;
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||
register struct blockvector *blockvector;
|
||
register struct linetable *lv;
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||
|
||
/* Finish the lexical context of the last function in the file. */
|
||
|
||
if (context_stack)
|
||
{
|
||
cstk = context_stack;
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||
context_stack = 0;
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (cstk->name, &local_symbols, cstk->old_blocks,
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cstk->start_addr, cur_src_end_addr);
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free (cstk);
|
||
}
|
||
|
||
/* Ignore a file that has no functions with real debugging info. */
|
||
if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0)
|
||
{
|
||
free (line_vector);
|
||
line_vector = 0;
|
||
line_vector_length = -1;
|
||
last_source_file = 0;
|
||
return;
|
||
}
|
||
|
||
/* Create the two top-level blocks for this file (STATIC_BLOCK and
|
||
GLOBAL_BLOCK). */
|
||
finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr);
|
||
finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr);
|
||
|
||
/* Create the blockvector that points to all the file's blocks. */
|
||
blockvector = make_blockvector ();
|
||
|
||
/* Now create the symtab object for this source file. */
|
||
symtab = allocate_symtab (last_source_file, objfile);
|
||
|
||
/* Fill in its components. */
|
||
symtab->blockvector = blockvector;
|
||
symtab->free_code = free_linetable;
|
||
symtab->free_ptr = 0;
|
||
symtab->filename = last_source_file;
|
||
symtab->dirname = NULL;
|
||
lv = line_vector;
|
||
lv->nitems = line_vector_index;
|
||
symtab->linetable = (struct linetable *)
|
||
xrealloc (lv, (sizeof (struct linetable)
|
||
+ lv->nitems * sizeof (struct linetable_entry)));
|
||
|
||
free_named_symtabs (symtab->filename);
|
||
|
||
/* Link the new symtab into the list of such. */
|
||
symtab->next = symtab_list;
|
||
symtab_list = symtab;
|
||
|
||
/* Reinitialize for beginning of new file. */
|
||
line_vector = 0;
|
||
line_vector_length = -1;
|
||
last_source_file = 0;
|
||
}
|
||
|
||
static void
|
||
record_misc_function (name, address)
|
||
char *name;
|
||
CORE_ADDR address;
|
||
{
|
||
/* We don't want TDESC entry points on the misc_function_vector */
|
||
if (name[0] == '@') return;
|
||
|
||
/* mf_text isn't true, but apparently COFF doesn't tell us what it really
|
||
is, so this guess is more useful than mf_unknown. */
|
||
prim_record_misc_function (savestring (name, strlen (name)),
|
||
address,
|
||
(int)mf_text);
|
||
}
|
||
|
||
/* coff_symfile_init ()
|
||
is the coff-specific initialization routine for reading symbols.
|
||
It is passed a struct sym_fns which contains, among other things,
|
||
the BFD for the file whose symbols are being read, and a slot for
|
||
a pointer to "private data" which we fill with cookies and other
|
||
treats for coff_symfile_read ().
|
||
|
||
We will only be called if this is a COFF or COFF-like file.
|
||
BFD handles figuring out the format of the file, and code in symtab.c
|
||
uses BFD's determination to vector to us.
|
||
|
||
The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
|
||
|
||
struct coff_symfile_info {
|
||
file_ptr min_lineno_offset; /* Where in file lowest line#s are */
|
||
file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
|
||
};
|
||
|
||
static int text_bfd_scnum;
|
||
|
||
static void
|
||
coff_symfile_init (sf)
|
||
struct sym_fns *sf;
|
||
{
|
||
asection *section;
|
||
bfd *abfd = sf->sym_bfd;
|
||
|
||
/* Allocate struct to keep track of the symfile */
|
||
/* FIXME memory leak */
|
||
sf->sym_private = xmalloc (sizeof (struct coff_symfile_info));
|
||
|
||
/* Save startup file's range of PC addresses to help blockframe.c
|
||
decide where the bottom of the stack is. */
|
||
if (bfd_get_file_flags (abfd) & EXEC_P)
|
||
{
|
||
/* Executable file -- record its entry point so we'll recognize
|
||
the startup file because it contains the entry point. */
|
||
entry_point = bfd_get_start_address (abfd);
|
||
}
|
||
else
|
||
{
|
||
/* Examination of non-executable.o files. Short-circuit this stuff. */
|
||
/* ~0 will not be in any file, we hope. */
|
||
entry_point = ~0;
|
||
/* set the startup file to be an empty range. */
|
||
startup_file_start = 0;
|
||
startup_file_end = 0;
|
||
}
|
||
/* Save the section number for the text section */
|
||
if (section = bfd_get_section_by_name(abfd,".text"))
|
||
text_bfd_scnum = section->index;
|
||
else
|
||
text_bfd_scnum = -1;
|
||
}
|
||
|
||
/* This function is called for every section; it finds the outer limits
|
||
of the line table (minimum and maximum file offset) so that the
|
||
mainline code can read the whole thing for efficiency. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
find_linenos (abfd, asect, vpinfo)
|
||
bfd *abfd;
|
||
sec_ptr asect;
|
||
void *vpinfo;
|
||
{
|
||
struct coff_symfile_info *info;
|
||
int size, count;
|
||
file_ptr offset, maxoff;
|
||
|
||
/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
|
||
count = asect->lineno_count;
|
||
/* End of warning */
|
||
|
||
if (count == 0)
|
||
return;
|
||
size = count * local_linesz;
|
||
|
||
info = (struct coff_symfile_info *)vpinfo;
|
||
/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
|
||
offset = asect->line_filepos;
|
||
/* End of warning */
|
||
|
||
if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
|
||
info->min_lineno_offset = offset;
|
||
|
||
maxoff = offset + size;
|
||
if (maxoff > info->max_lineno_offset)
|
||
info->max_lineno_offset = maxoff;
|
||
}
|
||
|
||
|
||
/* The BFD for this file -- only good while we're actively reading
|
||
symbols into a psymtab or a symtab. */
|
||
|
||
static bfd *symfile_bfd;
|
||
|
||
/* Read a symbol file, after initialization by coff_symfile_init. */
|
||
/* FIXME! Addr and Mainline are not used yet -- this will not work for
|
||
shared libraries or add_file! */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
coff_symfile_read (sf, addr, mainline)
|
||
struct sym_fns *sf;
|
||
CORE_ADDR addr;
|
||
int mainline;
|
||
{
|
||
struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private;
|
||
bfd *abfd = sf->objfile->obfd;
|
||
coff_data_type *cdata = coff_data (abfd);
|
||
char *name = bfd_get_filename (abfd);
|
||
int desc;
|
||
register int val;
|
||
int num_symbols;
|
||
int symtab_offset;
|
||
int stringtab_offset;
|
||
|
||
symfile_bfd = abfd; /* Kludge for swap routines */
|
||
|
||
/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
|
||
desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */
|
||
num_symbols = bfd_get_symcount (abfd); /* How many syms */
|
||
symtab_offset = cdata->sym_filepos; /* Symbol table file offset */
|
||
stringtab_offset = symtab_offset + /* String table file offset */
|
||
num_symbols * cdata->local_symesz;
|
||
|
||
/* Set a few file-statics that give us specific information about
|
||
the particular COFF file format we're reading. */
|
||
local_linesz = cdata->local_linesz;
|
||
local_n_btmask = cdata->local_n_btmask;
|
||
local_n_btshft = cdata->local_n_btshft;
|
||
local_n_tmask = cdata->local_n_tmask;
|
||
local_n_tshift = cdata->local_n_tshift;
|
||
local_linesz = cdata->local_linesz;
|
||
local_symesz = cdata->local_symesz;
|
||
local_auxesz = cdata->local_auxesz;
|
||
|
||
/* Allocate space for raw symbol and aux entries, based on their
|
||
space requirements as reported by BFD. */
|
||
temp_sym = (char *) xmalloc
|
||
(cdata->local_symesz + cdata->local_auxesz);
|
||
temp_aux = temp_sym + cdata->local_symesz;
|
||
make_cleanup (free_current_contents, &temp_sym);
|
||
/* End of warning */
|
||
|
||
/* Read the line number table, all at once. */
|
||
info->min_lineno_offset = 0;
|
||
info->max_lineno_offset = 0;
|
||
bfd_map_over_sections (abfd, find_linenos, info);
|
||
|
||
val = init_lineno (desc, info->min_lineno_offset,
|
||
info->max_lineno_offset - info->min_lineno_offset);
|
||
if (val < 0)
|
||
error ("\"%s\": error reading line numbers\n", name);
|
||
|
||
/* Now read the string table, all at once. */
|
||
|
||
val = init_stringtab (desc, stringtab_offset);
|
||
if (val < 0)
|
||
error ("\"%s\": can't get string table", name);
|
||
make_cleanup (free_stringtab, 0);
|
||
|
||
/* Position to read the symbol table. Do not read it all at once. */
|
||
val = lseek (desc, (long)symtab_offset, 0);
|
||
if (val < 0)
|
||
perror_with_name (name);
|
||
|
||
init_misc_bunches ();
|
||
make_cleanup (discard_misc_bunches, 0);
|
||
|
||
/* Now that the executable file is positioned at symbol table,
|
||
process it and define symbols accordingly. */
|
||
|
||
read_coff_symtab (desc, num_symbols, sf->objfile);
|
||
|
||
patch_opaque_types ();
|
||
|
||
/* Sort symbols alphabetically within each block. */
|
||
|
||
sort_all_symtab_syms ();
|
||
|
||
/* Go over the misc symbol bunches and install them in vector. */
|
||
|
||
condense_misc_bunches (!mainline);
|
||
}
|
||
|
||
static void
|
||
coff_new_init ()
|
||
{
|
||
/* Nothin' to do */
|
||
}
|
||
|
||
/* Simplified internal version of coff symbol table information */
|
||
|
||
struct coff_symbol {
|
||
char *c_name;
|
||
int c_symnum; /* symbol number of this entry */
|
||
int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */
|
||
long c_value;
|
||
int c_sclass;
|
||
int c_secnum;
|
||
unsigned int c_type;
|
||
};
|
||
|
||
/* Given pointers to a symbol table in coff style exec file,
|
||
analyze them and create struct symtab's describing the symbols.
|
||
NSYMS is the number of symbols in the symbol table.
|
||
We read them one at a time using read_one_sym (). */
|
||
|
||
static void
|
||
read_coff_symtab (desc, nsyms, objfile)
|
||
int desc;
|
||
int nsyms;
|
||
struct objfile *objfile;
|
||
{
|
||
int newfd; /* Avoid multiple closes on same desc */
|
||
FILE *stream;
|
||
register struct context_stack *new;
|
||
struct coff_symbol coff_symbol;
|
||
register struct coff_symbol *cs = &coff_symbol;
|
||
static struct internal_syment main_sym;
|
||
static union internal_auxent main_aux;
|
||
struct coff_symbol fcn_cs_saved;
|
||
static struct internal_syment fcn_sym_saved;
|
||
static union internal_auxent fcn_aux_saved;
|
||
|
||
/* A .file is open. */
|
||
int in_source_file = 0;
|
||
int num_object_files = 0;
|
||
int next_file_symnum = -1;
|
||
|
||
/* Name of the current file. */
|
||
char *filestring = "";
|
||
int depth;
|
||
int fcn_first_line;
|
||
int fcn_last_line;
|
||
int fcn_start_addr;
|
||
long fcn_line_ptr;
|
||
struct cleanup *old_chain;
|
||
|
||
|
||
newfd = dup (desc);
|
||
if (newfd == -1)
|
||
fatal ("Too many open files");
|
||
stream = fdopen (newfd, "r");
|
||
|
||
/* These cleanups will be discarded below if we succeed. */
|
||
old_chain = make_cleanup (free_objfile, objfile);
|
||
make_cleanup (fclose, stream);
|
||
|
||
nlist_stream_global = stream;
|
||
nlist_nsyms_global = nsyms;
|
||
last_source_file = 0;
|
||
bzero (opaque_type_chain, sizeof opaque_type_chain);
|
||
|
||
if (type_vector) /* Get rid of previous one */
|
||
free (type_vector);
|
||
type_vector_length = 160;
|
||
type_vector = (struct type **)
|
||
xmalloc (type_vector_length * sizeof (struct type *));
|
||
bzero (type_vector, type_vector_length * sizeof (struct type *));
|
||
|
||
start_symtab ();
|
||
|
||
symnum = 0;
|
||
while (symnum < nsyms)
|
||
{
|
||
QUIT; /* Make this command interruptable. */
|
||
read_one_sym (cs, &main_sym, &main_aux);
|
||
|
||
#ifdef SEM
|
||
temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 |
|
||
cs->c_name[2] << 8 | cs->c_name[3];
|
||
if (int_sem_val == temp_sem_val)
|
||
last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10);
|
||
#endif
|
||
|
||
if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
|
||
{
|
||
if (last_source_file)
|
||
end_symtab (objfile);
|
||
|
||
start_symtab ();
|
||
complete_symtab ("_globals_", 0, first_object_file_end);
|
||
/* done with all files, everything from here on out is globals */
|
||
}
|
||
|
||
/* Special case for file with type declarations only, no text. */
|
||
if (!last_source_file && SDB_TYPE (cs->c_type)
|
||
&& cs->c_secnum == N_DEBUG)
|
||
complete_symtab (filestring, 0, 0);
|
||
|
||
/* Typedefs should not be treated as symbol definitions. */
|
||
if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
|
||
{
|
||
/* record as misc function. if we get '.bf' next,
|
||
* then we undo this step
|
||
*/
|
||
record_misc_function (cs->c_name, cs->c_value);
|
||
|
||
fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
|
||
fcn_start_addr = cs->c_value;
|
||
fcn_cs_saved = *cs;
|
||
fcn_sym_saved = main_sym;
|
||
fcn_aux_saved = main_aux;
|
||
continue;
|
||
}
|
||
|
||
switch (cs->c_sclass)
|
||
{
|
||
case C_EFCN:
|
||
case C_EXTDEF:
|
||
case C_ULABEL:
|
||
case C_USTATIC:
|
||
case C_LINE:
|
||
case C_ALIAS:
|
||
case C_HIDDEN:
|
||
complain (&bad_sclass_complaint, cs->c_name);
|
||
break;
|
||
|
||
case C_FILE:
|
||
/*
|
||
* c_value field contains symnum of next .file entry in table
|
||
* or symnum of first global after last .file.
|
||
*/
|
||
next_file_symnum = cs->c_value;
|
||
filestring = getfilename (&main_aux);
|
||
/*
|
||
* Complete symbol table for last object file
|
||
* containing debugging information.
|
||
*/
|
||
if (last_source_file)
|
||
{
|
||
end_symtab (objfile);
|
||
start_symtab ();
|
||
}
|
||
in_source_file = 1;
|
||
break;
|
||
|
||
case C_STAT:
|
||
if (cs->c_name[0] == '.') {
|
||
if (strcmp (cs->c_name, ".text") == 0) {
|
||
/* FIXME: don't wire in ".text" as section name
|
||
or symbol name! */
|
||
if (++num_object_files == 1) {
|
||
/* last address of startup file */
|
||
first_object_file_end = cs->c_value +
|
||
main_aux.x_scn.x_scnlen;
|
||
}
|
||
/* Check for in_source_file deals with case of
|
||
a file with debugging symbols
|
||
followed by a later file with no symbols. */
|
||
if (in_source_file)
|
||
complete_symtab (filestring, cs->c_value,
|
||
main_aux.x_scn.x_scnlen);
|
||
in_source_file = 0;
|
||
}
|
||
/* flush rest of '.' symbols */
|
||
break;
|
||
}
|
||
else if (!SDB_TYPE (cs->c_type)
|
||
&& cs->c_name[0] == 'L'
|
||
&& (strncmp (cs->c_name, "LI%", 3) == 0
|
||
|| strncmp (cs->c_name, "LF%", 3) == 0
|
||
|| strncmp (cs->c_name,"LC%",3) == 0
|
||
|| strncmp (cs->c_name,"LP%",3) == 0
|
||
|| strncmp (cs->c_name,"LPB%",4) == 0
|
||
|| strncmp (cs->c_name,"LBB%",4) == 0
|
||
|| strncmp (cs->c_name,"LBE%",4) == 0
|
||
|| strncmp (cs->c_name,"LPBX%",5) == 0))
|
||
/* At least on a 3b1, gcc generates swbeg and string labels
|
||
that look like this. Ignore them. */
|
||
break;
|
||
/* fall in for static symbols that don't start with '.' */
|
||
case C_EXT:
|
||
if (!SDB_TYPE (cs->c_type)) {
|
||
/* FIXME: This is BOGUS Will Robinson!
|
||
Coff should provide the SEC_CODE flag for executable sections,
|
||
then if we could look up sections by section number we
|
||
could see if the flags indicate SEC_CODE. If so, then
|
||
record this symbol as a miscellaneous function. But why
|
||
are absolute syms recorded as functions, anyway? */
|
||
if (cs->c_secnum <= text_bfd_scnum+1) {/* text or abs */
|
||
record_misc_function (cs->c_name, cs->c_value);
|
||
break;
|
||
} else {
|
||
cs->c_type = T_INT;
|
||
}
|
||
}
|
||
(void) process_coff_symbol (cs, &main_aux);
|
||
break;
|
||
|
||
case C_FCN:
|
||
if (strcmp (cs->c_name, ".bf") == 0)
|
||
{
|
||
within_function = 1;
|
||
|
||
/* value contains address of first non-init type code */
|
||
/* main_aux.x_sym.x_misc.x_lnsz.x_lnno
|
||
contains line number of '{' } */
|
||
if (cs->c_naux != 1)
|
||
complain (&bf_no_aux_complaint, cs->c_symnum);
|
||
fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
|
||
|
||
new = (struct context_stack *)
|
||
xmalloc (sizeof (struct context_stack));
|
||
new->depth = depth = 0;
|
||
new->next = 0;
|
||
context_stack = new;
|
||
new->locals = 0;
|
||
new->old_blocks = pending_blocks;
|
||
new->start_addr = fcn_start_addr;
|
||
fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
|
||
new->name = process_coff_symbol (&fcn_cs_saved,
|
||
&fcn_aux_saved);
|
||
}
|
||
else if (strcmp (cs->c_name, ".ef") == 0)
|
||
{
|
||
/* the value of .ef is the address of epilogue code;
|
||
* not useful for gdb
|
||
*/
|
||
/* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
|
||
contains number of lines to '}' */
|
||
new = context_stack;
|
||
if (new == 0)
|
||
{
|
||
complain (&ef_complaint, cs->c_symnum);
|
||
within_function = 0;
|
||
break;
|
||
}
|
||
if (cs->c_naux != 1) {
|
||
complain (&ef_no_aux_complaint, cs->c_symnum);
|
||
fcn_last_line = 0x7FFFFFFF;
|
||
} else {
|
||
fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno;
|
||
}
|
||
enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line);
|
||
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr,
|
||
#if defined (FUNCTION_EPILOGUE_SIZE)
|
||
/* This macro should be defined only on
|
||
machines where the
|
||
fcn_aux_saved.x_sym.x_misc.x_fsize
|
||
field is always zero.
|
||
So use the .bf record information that
|
||
points to the epilogue and add the size
|
||
of the epilogue. */
|
||
cs->c_value + FUNCTION_EPILOGUE_SIZE
|
||
#else
|
||
fcn_cs_saved.c_value +
|
||
fcn_aux_saved.x_sym.x_misc.x_fsize
|
||
#endif
|
||
);
|
||
context_stack = 0;
|
||
within_function = 0;
|
||
free (new);
|
||
}
|
||
break;
|
||
|
||
case C_BLOCK:
|
||
if (strcmp (cs->c_name, ".bb") == 0)
|
||
{
|
||
new = (struct context_stack *)
|
||
xmalloc (sizeof (struct context_stack));
|
||
depth++;
|
||
new->depth = depth;
|
||
new->next = context_stack;
|
||
context_stack = new;
|
||
new->locals = local_symbols;
|
||
new->old_blocks = pending_blocks;
|
||
new->start_addr = cs->c_value;
|
||
new->name = 0;
|
||
local_symbols = 0;
|
||
}
|
||
else if (strcmp (cs->c_name, ".eb") == 0)
|
||
{
|
||
new = context_stack;
|
||
if (new == 0 || depth != new->depth)
|
||
error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
|
||
symnum);
|
||
if (local_symbols && context_stack->next)
|
||
{
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (0, &local_symbols, new->old_blocks,
|
||
new->start_addr, cs->c_value);
|
||
}
|
||
depth--;
|
||
local_symbols = new->locals;
|
||
context_stack = new->next;
|
||
free (new);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
(void) process_coff_symbol (cs, &main_aux);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (last_source_file)
|
||
end_symtab (objfile);
|
||
fclose (stream);
|
||
discard_cleanups (old_chain);
|
||
}
|
||
|
||
/* Routines for reading headers and symbols from executable. */
|
||
|
||
#ifdef FIXME
|
||
/* Move these XXXMAGIC symbol defns into BFD! */
|
||
|
||
/* Read COFF file header, check magic number,
|
||
and return number of symbols. */
|
||
read_file_hdr (chan, file_hdr)
|
||
int chan;
|
||
FILHDR *file_hdr;
|
||
{
|
||
lseek (chan, 0L, 0);
|
||
if (myread (chan, (char *)file_hdr, FILHSZ) < 0)
|
||
return -1;
|
||
|
||
switch (file_hdr->f_magic)
|
||
{
|
||
#ifdef MC68MAGIC
|
||
case MC68MAGIC:
|
||
#endif
|
||
#ifdef NS32GMAGIC
|
||
case NS32GMAGIC:
|
||
case NS32SMAGIC:
|
||
#endif
|
||
#ifdef I386MAGIC
|
||
case I386MAGIC:
|
||
#endif
|
||
#ifdef CLIPPERMAGIC
|
||
case CLIPPERMAGIC:
|
||
#endif
|
||
#if defined (MC68KWRMAGIC) \
|
||
&& (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC)
|
||
case MC68KWRMAGIC:
|
||
#endif
|
||
#ifdef MC68KROMAGIC
|
||
case MC68KROMAGIC:
|
||
case MC68KPGMAGIC:
|
||
#endif
|
||
#ifdef MC88DGMAGIC
|
||
case MC88DGMAGIC:
|
||
#endif
|
||
#ifdef MC88MAGIC
|
||
case MC88MAGIC:
|
||
#endif
|
||
#ifdef I960ROMAGIC
|
||
case I960ROMAGIC: /* Intel 960 */
|
||
#endif
|
||
#ifdef I960RWMAGIC
|
||
case I960RWMAGIC: /* Intel 960 */
|
||
#endif
|
||
return file_hdr->f_nsyms;
|
||
|
||
default:
|
||
#ifdef BADMAG
|
||
if (BADMAG(file_hdr))
|
||
return -1;
|
||
else
|
||
return file_hdr->f_nsyms;
|
||
#else
|
||
return -1;
|
||
#endif
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Read the next symbol, swap it, and return it in both internal_syment
|
||
form, and coff_symbol form. Also return its first auxent, if any,
|
||
in internal_auxent form, and skip any other auxents. */
|
||
|
||
static void
|
||
read_one_sym (cs, sym, aux)
|
||
register struct coff_symbol *cs;
|
||
register struct internal_syment *sym;
|
||
register union internal_auxent *aux;
|
||
{
|
||
int i;
|
||
|
||
cs->c_symnum = symnum;
|
||
fread (temp_sym, local_symesz, 1, nlist_stream_global);
|
||
bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym);
|
||
cs->c_naux = sym->n_numaux & 0xff;
|
||
if (cs->c_naux >= 1)
|
||
{
|
||
fread (temp_aux, local_auxesz, 1, nlist_stream_global);
|
||
bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass,
|
||
(char *)aux);
|
||
/* If more than one aux entry, read past it (only the first aux
|
||
is important). */
|
||
for (i = 1; i < cs->c_naux; i++)
|
||
fread (temp_aux, local_auxesz, 1, nlist_stream_global);
|
||
}
|
||
cs->c_name = getsymname (sym);
|
||
cs->c_value = sym->n_value;
|
||
cs->c_sclass = (sym->n_sclass & 0xff);
|
||
cs->c_secnum = sym->n_scnum;
|
||
cs->c_type = (unsigned) sym->n_type;
|
||
if (!SDB_TYPE (cs->c_type))
|
||
cs->c_type = 0;
|
||
|
||
symnum += 1 + cs->c_naux;
|
||
}
|
||
|
||
/* Support for string table handling */
|
||
|
||
static char *stringtab = NULL;
|
||
|
||
static int
|
||
init_stringtab (chan, offset)
|
||
int chan;
|
||
long offset;
|
||
{
|
||
long length;
|
||
int val;
|
||
unsigned char lengthbuf[4];
|
||
|
||
if (stringtab)
|
||
{
|
||
free (stringtab);
|
||
stringtab = NULL;
|
||
}
|
||
|
||
if (lseek (chan, offset, 0) < 0)
|
||
return -1;
|
||
|
||
val = myread (chan, (char *)lengthbuf, sizeof lengthbuf);
|
||
length = bfd_h_get_32 (symfile_bfd, lengthbuf);
|
||
|
||
/* If no string table is needed, then the file may end immediately
|
||
after the symbols. Just return with `stringtab' set to null. */
|
||
if (val != sizeof length || length < sizeof length)
|
||
return 0;
|
||
|
||
stringtab = (char *) xmalloc (length);
|
||
if (stringtab == NULL)
|
||
return -1;
|
||
|
||
bcopy (&length, stringtab, sizeof length);
|
||
if (length == sizeof length) /* Empty table -- just the count */
|
||
return 0;
|
||
|
||
val = myread (chan, stringtab + sizeof length, length - sizeof length);
|
||
if (val != length - sizeof length || stringtab[length - 1] != '\0')
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
free_stringtab ()
|
||
{
|
||
if (stringtab)
|
||
free (stringtab);
|
||
stringtab = NULL;
|
||
}
|
||
|
||
static char *
|
||
getsymname (symbol_entry)
|
||
struct internal_syment *symbol_entry;
|
||
{
|
||
static char buffer[SYMNMLEN+1];
|
||
char *result;
|
||
|
||
if (symbol_entry->_n._n_n._n_zeroes == 0)
|
||
{
|
||
result = stringtab + symbol_entry->_n._n_n._n_offset;
|
||
}
|
||
else
|
||
{
|
||
strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN);
|
||
buffer[SYMNMLEN] = '\0';
|
||
result = buffer;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static char *
|
||
getfilename (aux_entry)
|
||
union internal_auxent *aux_entry;
|
||
{
|
||
static char buffer[BUFSIZ];
|
||
register char *temp;
|
||
char *result;
|
||
extern char *rindex ();
|
||
|
||
#ifndef COFF_NO_LONG_FILE_NAMES
|
||
#if defined (x_zeroes)
|
||
/* Data General. */
|
||
if (aux_entry->x_zeroes == 0)
|
||
strcpy (buffer, stringtab + aux_entry->x_offset);
|
||
#else /* no x_zeroes */
|
||
if (aux_entry->x_file.x_n.x_zeroes == 0)
|
||
strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset);
|
||
#endif /* no x_zeroes */
|
||
else
|
||
#endif /* COFF_NO_LONG_FILE_NAMES */
|
||
{
|
||
#if defined (x_name)
|
||
/* Data General. */
|
||
strncpy (buffer, aux_entry->x_name, FILNMLEN);
|
||
#else
|
||
strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
|
||
#endif
|
||
buffer[FILNMLEN] = '\0';
|
||
}
|
||
result = buffer;
|
||
if ((temp = rindex (result, '/')) != NULL)
|
||
result = temp + 1;
|
||
return (result);
|
||
}
|
||
|
||
/* Support for line number handling */
|
||
static char *linetab = NULL;
|
||
static long linetab_offset;
|
||
static unsigned long linetab_size;
|
||
|
||
/* Read in all the line numbers for fast lookups later. Leave them in
|
||
external (unswapped) format in memory; we'll swap them as we enter
|
||
them into GDB's data structures. */
|
||
|
||
static int
|
||
init_lineno (chan, offset, size)
|
||
int chan;
|
||
long offset;
|
||
int size;
|
||
{
|
||
int val;
|
||
|
||
linetab_offset = offset;
|
||
linetab_size = size;
|
||
|
||
if (size == 0)
|
||
return 0;
|
||
|
||
if (lseek (chan, offset, 0) < 0)
|
||
return -1;
|
||
|
||
/* Allocate the desired table, plus a sentinel */
|
||
linetab = (char *) xmalloc (size + local_linesz);
|
||
|
||
val = myread (chan, linetab, size);
|
||
if (val != size)
|
||
return -1;
|
||
|
||
/* Terminate it with an all-zero sentinel record */
|
||
bzero (linetab + size, local_linesz);
|
||
|
||
make_cleanup (free, linetab); /* Be sure it gets de-allocated. */
|
||
return 0;
|
||
}
|
||
|
||
#if !defined (L_LNNO32)
|
||
#define L_LNNO32(lp) ((lp)->l_lnno)
|
||
#endif
|
||
|
||
static void
|
||
enter_linenos (file_offset, first_line, last_line)
|
||
long file_offset;
|
||
register int first_line;
|
||
register int last_line;
|
||
{
|
||
register char *rawptr;
|
||
struct internal_lineno lptr;
|
||
|
||
if (file_offset < linetab_offset)
|
||
{
|
||
complain (&lineno_complaint, file_offset);
|
||
if (file_offset > linetab_size) /* Too big to be an offset? */
|
||
return;
|
||
file_offset += linetab_offset; /* Try reading at that linetab offset */
|
||
}
|
||
|
||
rawptr = &linetab[file_offset - linetab_offset];
|
||
|
||
/* skip first line entry for each function */
|
||
rawptr += local_linesz;
|
||
/* line numbers start at one for the first line of the function */
|
||
first_line--;
|
||
|
||
for (;;) {
|
||
bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr);
|
||
rawptr += local_linesz;
|
||
/* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
|
||
if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line)
|
||
record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr);
|
||
else
|
||
break;
|
||
}
|
||
}
|
||
|
||
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)
|
||
{
|
||
c = p[2];
|
||
total += c << 4;
|
||
if (c)
|
||
total += p[3] << 6;
|
||
}
|
||
|
||
return total % HASHSIZE;
|
||
}
|
||
|
||
static void
|
||
patch_type (type, real_type)
|
||
struct type *type;
|
||
struct type *real_type;
|
||
{
|
||
register struct type *target = TYPE_TARGET_TYPE (type);
|
||
register struct type *real_target = TYPE_TARGET_TYPE (real_type);
|
||
int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field);
|
||
|
||
TYPE_LENGTH (target) = TYPE_LENGTH (real_target);
|
||
TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target);
|
||
TYPE_FIELDS (target) = (struct field *)
|
||
obstack_alloc (symbol_obstack, field_size);
|
||
|
||
bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size);
|
||
|
||
if (TYPE_NAME (real_target))
|
||
{
|
||
if (TYPE_NAME (target))
|
||
free (TYPE_NAME (target));
|
||
TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL);
|
||
}
|
||
}
|
||
|
||
/* Patch up all appropriate typedef symbols in the opaque_type_chains
|
||
so that they can be used to print out opaque data structures properly */
|
||
|
||
static void
|
||
patch_opaque_types ()
|
||
{
|
||
struct symtab *s;
|
||
|
||
/* Look at each symbol in the per-file block of each symtab. */
|
||
for (s = symtab_list; s; s = s->next)
|
||
{
|
||
register struct block *b;
|
||
register int i;
|
||
|
||
/* Go through the per-file symbols only */
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
|
||
for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
|
||
{
|
||
register struct symbol *real_sym;
|
||
|
||
/* Find completed typedefs to use to fix opaque ones.
|
||
Remove syms from the chain when their types are stored,
|
||
but search the whole chain, as there may be several syms
|
||
from different files with the same name. */
|
||
real_sym = BLOCK_SYM (b, i);
|
||
if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF &&
|
||
SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE &&
|
||
TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR &&
|
||
TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0)
|
||
{
|
||
register char *name = SYMBOL_NAME (real_sym);
|
||
register int hash = hashname (name);
|
||
register struct symbol *sym, *prev;
|
||
|
||
prev = 0;
|
||
for (sym = opaque_type_chain[hash]; sym;)
|
||
{
|
||
if (name[0] == SYMBOL_NAME (sym)[0] &&
|
||
!strcmp (name + 1, SYMBOL_NAME (sym) + 1))
|
||
{
|
||
if (prev)
|
||
SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
|
||
else
|
||
opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
|
||
|
||
patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym));
|
||
|
||
if (prev)
|
||
sym = SYMBOL_VALUE_CHAIN (prev);
|
||
else
|
||
sym = opaque_type_chain[hash];
|
||
}
|
||
else
|
||
{
|
||
prev = sym;
|
||
sym = SYMBOL_VALUE_CHAIN (sym);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
static struct symbol *
|
||
process_coff_symbol (cs, aux)
|
||
register struct coff_symbol *cs;
|
||
register union internal_auxent *aux;
|
||
{
|
||
register struct symbol *sym
|
||
= (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
|
||
char *name;
|
||
#ifdef NAMES_HAVE_UNDERSCORE
|
||
int offset = 1;
|
||
#else
|
||
int offset = 0;
|
||
#endif
|
||
|
||
bzero (sym, sizeof (struct symbol));
|
||
name = cs->c_name;
|
||
name = (name[0] == '_' ? name + offset : name);
|
||
SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name));
|
||
|
||
/* default assumptions */
|
||
SYMBOL_VALUE (sym) = cs->c_value;
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
|
||
if (ISFCN (cs->c_type))
|
||
{
|
||
#if 0
|
||
/* FIXME: This has NOT been tested. The DBX version has.. */
|
||
/* Generate a template for the type of this function. The
|
||
types of the arguments will be added as we read the symbol
|
||
table. */
|
||
struct type *new = (struct type *)
|
||
obstack_alloc (symbol_obstack, sizeof (struct type));
|
||
|
||
bcopy(lookup_function_type (decode_function_type (cs, cs->c_type, aux)),
|
||
new, sizeof(struct type));
|
||
SYMBOL_TYPE (sym) = new;
|
||
in_function_type = SYMBOL_TYPE(sym);
|
||
#else
|
||
SYMBOL_TYPE(sym) =
|
||
lookup_function_type (decode_function_type (cs, cs->c_type, aux));
|
||
#endif
|
||
|
||
SYMBOL_CLASS (sym) = LOC_BLOCK;
|
||
if (cs->c_sclass == C_STAT)
|
||
add_symbol_to_list (sym, &file_symbols);
|
||
else if (cs->c_sclass == C_EXT)
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
}
|
||
else
|
||
{
|
||
SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux);
|
||
switch (cs->c_sclass)
|
||
{
|
||
case C_NULL:
|
||
break;
|
||
|
||
case C_AUTO:
|
||
SYMBOL_CLASS (sym) = LOC_LOCAL;
|
||
add_symbol_to_list (sym, &local_symbols);
|
||
break;
|
||
|
||
case C_EXT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
break;
|
||
|
||
case C_STAT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value;
|
||
if (within_function) {
|
||
/* Static symbol of local scope */
|
||
add_symbol_to_list (sym, &local_symbols);
|
||
}
|
||
else {
|
||
/* Static symbol at top level of file */
|
||
add_symbol_to_list (sym, &file_symbols);
|
||
}
|
||
break;
|
||
|
||
#ifdef C_GLBLREG /* AMD coff */
|
||
case C_GLBLREG:
|
||
#endif
|
||
case C_REG:
|
||
SYMBOL_CLASS (sym) = LOC_REGISTER;
|
||
SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value);
|
||
add_symbol_to_list (sym, &local_symbols);
|
||
break;
|
||
|
||
case C_LABEL:
|
||
break;
|
||
|
||
case C_ARG:
|
||
SYMBOL_CLASS (sym) = LOC_ARG;
|
||
#if 0
|
||
/* FIXME: This has not been tested. */
|
||
/* Add parameter to function. */
|
||
add_param_to_type(&in_function_type,sym);
|
||
#endif
|
||
add_symbol_to_list (sym, &local_symbols);
|
||
#if !defined (BELIEVE_PCC_PROMOTION)
|
||
/* If PCC says a parameter is a short or a char,
|
||
it is really an int. */
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (builtin_type_int)
|
||
&& TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) {
|
||
SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym))?
|
||
builtin_type_unsigned_int:
|
||
builtin_type_int;
|
||
}
|
||
#endif
|
||
break;
|
||
|
||
case C_REGPARM:
|
||
SYMBOL_CLASS (sym) = LOC_REGPARM;
|
||
SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value);
|
||
add_symbol_to_list (sym, &local_symbols);
|
||
#if !defined (BELIEVE_PCC_PROMOTION)
|
||
/* If PCC says a parameter is a short or a char,
|
||
it is really an int. */
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (builtin_type_int)
|
||
&& TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) {
|
||
SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym))?
|
||
builtin_type_unsigned_int:
|
||
builtin_type_int;
|
||
}
|
||
#endif
|
||
break;
|
||
|
||
case C_TPDEF:
|
||
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
|
||
/* If type has no name, give it one */
|
||
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), NULL);
|
||
|
||
/* Keep track of any type which points to empty structured type,
|
||
so it can be filled from a definition from another file */
|
||
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR &&
|
||
TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0)
|
||
{
|
||
register int i = hashname (SYMBOL_NAME (sym));
|
||
|
||
SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i];
|
||
opaque_type_chain[i] = sym;
|
||
}
|
||
add_symbol_to_list (sym, &file_symbols);
|
||
break;
|
||
|
||
case C_STRTAG:
|
||
case C_UNTAG:
|
||
case C_ENTAG:
|
||
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
|
||
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 ("",
|
||
(cs->c_sclass == C_ENTAG
|
||
? "enum "
|
||
: (cs->c_sclass == C_STRTAG
|
||
? "struct " : "union ")),
|
||
SYMBOL_NAME (sym), NULL);
|
||
add_symbol_to_list (sym, &file_symbols);
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
return sym;
|
||
}
|
||
|
||
/* Decode a coff type specifier;
|
||
return the type that is meant. */
|
||
|
||
static
|
||
struct type *
|
||
decode_type (cs, c_type, aux)
|
||
register struct coff_symbol *cs;
|
||
unsigned int c_type;
|
||
register union internal_auxent *aux;
|
||
{
|
||
register struct type *type = 0;
|
||
unsigned int new_c_type;
|
||
|
||
if (c_type & ~N_BTMASK)
|
||
{
|
||
new_c_type = DECREF (c_type);
|
||
if (ISPTR (c_type))
|
||
{
|
||
type = decode_type (cs, new_c_type, aux);
|
||
type = lookup_pointer_type (type);
|
||
}
|
||
else if (ISFCN (c_type))
|
||
{
|
||
type = decode_type (cs, new_c_type, aux);
|
||
type = lookup_function_type (type);
|
||
}
|
||
else if (ISARY (c_type))
|
||
{
|
||
int i, n;
|
||
register unsigned short *dim;
|
||
struct type *base_type;
|
||
|
||
/* Define an array type. */
|
||
/* auxent refers to array, not base type */
|
||
if (aux->x_sym.x_tagndx.l == 0)
|
||
cs->c_naux = 0;
|
||
|
||
/* shift the indices down */
|
||
dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0];
|
||
i = 1;
|
||
n = dim[0];
|
||
for (i = 0; *dim && i < DIMNUM - 1; i++, dim++)
|
||
*dim = *(dim + 1);
|
||
*dim = 0;
|
||
|
||
type = (struct type *)
|
||
obstack_alloc (symbol_obstack, sizeof (struct type));
|
||
bzero (type, sizeof (struct type));
|
||
|
||
base_type = decode_type (cs, new_c_type, aux);
|
||
|
||
TYPE_CODE (type) = TYPE_CODE_ARRAY;
|
||
TYPE_TARGET_TYPE (type) = base_type;
|
||
TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type);
|
||
}
|
||
return type;
|
||
}
|
||
|
||
/* Reference to existing type */
|
||
if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0)
|
||
{
|
||
type = coff_alloc_type (aux->x_sym.x_tagndx.l);
|
||
return type;
|
||
}
|
||
|
||
return decode_base_type (cs, BTYPE (c_type), aux);
|
||
}
|
||
|
||
/* Decode a coff type specifier for function definition;
|
||
return the type that the function returns. */
|
||
|
||
static
|
||
struct type *
|
||
decode_function_type (cs, c_type, aux)
|
||
register struct coff_symbol *cs;
|
||
unsigned int c_type;
|
||
register union internal_auxent *aux;
|
||
{
|
||
if (aux->x_sym.x_tagndx.l == 0)
|
||
cs->c_naux = 0; /* auxent refers to function, not base type */
|
||
|
||
return decode_type (cs, DECREF (c_type), aux);
|
||
}
|
||
|
||
/* basic C types */
|
||
|
||
static
|
||
struct type *
|
||
decode_base_type (cs, c_type, aux)
|
||
register struct coff_symbol *cs;
|
||
unsigned int c_type;
|
||
register union internal_auxent *aux;
|
||
{
|
||
struct type *type;
|
||
|
||
switch (c_type)
|
||
{
|
||
case T_NULL:
|
||
/* shows up with "void (*foo)();" structure members */
|
||
return builtin_type_void;
|
||
|
||
#if 0
|
||
/* DGUX actually defines both T_ARG and T_VOID to the same value. */
|
||
#ifdef T_ARG
|
||
case T_ARG:
|
||
/* Shows up in DGUX, I think. Not sure where. */
|
||
return builtin_type_void; /* shouldn't show up here */
|
||
#endif
|
||
#endif /* 0 */
|
||
|
||
#ifdef T_VOID
|
||
case T_VOID:
|
||
/* Intel 960 COFF has this symbol and meaning. */
|
||
return builtin_type_void;
|
||
#endif
|
||
|
||
case T_CHAR:
|
||
return builtin_type_char;
|
||
|
||
case T_SHORT:
|
||
return builtin_type_short;
|
||
|
||
case T_INT:
|
||
return builtin_type_int;
|
||
|
||
case T_LONG:
|
||
return builtin_type_long;
|
||
|
||
case T_FLOAT:
|
||
return builtin_type_float;
|
||
|
||
case T_DOUBLE:
|
||
return builtin_type_double;
|
||
|
||
case T_STRUCT:
|
||
if (cs->c_naux != 1)
|
||
{
|
||
/* anonymous structure type */
|
||
type = coff_alloc_type (cs->c_symnum);
|
||
TYPE_CODE (type) = TYPE_CODE_STRUCT;
|
||
TYPE_NAME (type) = concat ("struct ", "<opaque>", NULL);
|
||
INIT_CPLUS_SPECIFIC(type);
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_FIELDS (type) = 0;
|
||
TYPE_NFIELDS (type) = 0;
|
||
}
|
||
else
|
||
{
|
||
type = read_struct_type (cs->c_symnum,
|
||
aux->x_sym.x_misc.x_lnsz.x_size,
|
||
aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
|
||
}
|
||
return type;
|
||
|
||
case T_UNION:
|
||
if (cs->c_naux != 1)
|
||
{
|
||
/* anonymous union type */
|
||
type = coff_alloc_type (cs->c_symnum);
|
||
TYPE_NAME (type) = concat ("union ", "<opaque>", NULL);
|
||
INIT_CPLUS_SPECIFIC(type);
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_FIELDS (type) = 0;
|
||
TYPE_NFIELDS (type) = 0;
|
||
}
|
||
else
|
||
{
|
||
type = read_struct_type (cs->c_symnum,
|
||
aux->x_sym.x_misc.x_lnsz.x_size,
|
||
aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
|
||
}
|
||
TYPE_CODE (type) = TYPE_CODE_UNION;
|
||
return type;
|
||
|
||
case T_ENUM:
|
||
return read_enum_type (cs->c_symnum,
|
||
aux->x_sym.x_misc.x_lnsz.x_size,
|
||
aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
|
||
|
||
case T_MOE:
|
||
/* shouldn't show up here */
|
||
break;
|
||
|
||
case T_UCHAR:
|
||
return builtin_type_unsigned_char;
|
||
|
||
case T_USHORT:
|
||
return builtin_type_unsigned_short;
|
||
|
||
case T_UINT:
|
||
return builtin_type_unsigned_int;
|
||
|
||
case T_ULONG:
|
||
return builtin_type_unsigned_long;
|
||
}
|
||
complain (&unexpected_type_complaint, cs->c_name);
|
||
return builtin_type_void;
|
||
}
|
||
|
||
/* 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 (index, length, lastsym)
|
||
int index;
|
||
int length;
|
||
int lastsym;
|
||
{
|
||
struct nextfield
|
||
{
|
||
struct nextfield *next;
|
||
struct field field;
|
||
};
|
||
|
||
register struct type *type;
|
||
register struct nextfield *list = 0;
|
||
struct nextfield *new;
|
||
int nfields = 0;
|
||
register int n;
|
||
char *name;
|
||
#ifdef NAMES_HAVE_UNDERSCORE
|
||
int offset = 1;
|
||
#else
|
||
int offset = 0;
|
||
#endif
|
||
struct coff_symbol member_sym;
|
||
register struct coff_symbol *ms = &member_sym;
|
||
struct internal_syment sub_sym;
|
||
union internal_auxent sub_aux;
|
||
int done = 0;
|
||
|
||
type = coff_alloc_type (index);
|
||
TYPE_CODE (type) = TYPE_CODE_STRUCT;
|
||
INIT_CPLUS_SPECIFIC(type);
|
||
TYPE_LENGTH (type) = length;
|
||
|
||
while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
|
||
{
|
||
read_one_sym (ms, &sub_sym, &sub_aux);
|
||
name = ms->c_name;
|
||
name = (name[0] == '_' ? name + offset : name);
|
||
|
||
switch (ms->c_sclass)
|
||
{
|
||
case C_MOS:
|
||
case C_MOU:
|
||
|
||
/* Get space to record the next field's data. */
|
||
new = (struct nextfield *) alloca (sizeof (struct nextfield));
|
||
new->next = list;
|
||
list = new;
|
||
|
||
/* Save the data. */
|
||
list->field.name = savestring (name, strlen (name));
|
||
list->field.type = decode_type (ms, ms->c_type, &sub_aux);
|
||
list->field.bitpos = 8 * ms->c_value;
|
||
list->field.bitsize = 0;
|
||
nfields++;
|
||
break;
|
||
|
||
case C_FIELD:
|
||
|
||
/* Get space to record the next field's data. */
|
||
new = (struct nextfield *) alloca (sizeof (struct nextfield));
|
||
new->next = list;
|
||
list = new;
|
||
|
||
/* Save the data. */
|
||
list->field.name = savestring (name, strlen (name));
|
||
list->field.type = decode_type (ms, ms->c_type, &sub_aux);
|
||
list->field.bitpos = ms->c_value;
|
||
list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size;
|
||
nfields++;
|
||
break;
|
||
|
||
case C_EOS:
|
||
done = 1;
|
||
break;
|
||
}
|
||
}
|
||
/* 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;
|
||
}
|
||
|
||
/* 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. */
|
||
/* Currently assumes it's sizeof (int) and doesn't use length. */
|
||
|
||
/* ARGSUSED */
|
||
static struct type *
|
||
read_enum_type (index, length, lastsym)
|
||
int index;
|
||
int length;
|
||
int lastsym;
|
||
{
|
||
register struct symbol *sym;
|
||
register struct type *type;
|
||
int nsyms = 0;
|
||
int done = 0;
|
||
struct pending **symlist;
|
||
struct coff_symbol member_sym;
|
||
register struct coff_symbol *ms = &member_sym;
|
||
struct internal_syment sub_sym;
|
||
union internal_auxent sub_aux;
|
||
struct pending *osyms, *syms;
|
||
register int n;
|
||
char *name;
|
||
#ifdef NAMES_HAVE_UNDERSCORE
|
||
int offset = 1;
|
||
#else
|
||
int offset = 0;
|
||
#endif
|
||
|
||
type = coff_alloc_type (index);
|
||
if (within_function)
|
||
symlist = &local_symbols;
|
||
else
|
||
symlist = &file_symbols;
|
||
osyms = *symlist;
|
||
|
||
while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
|
||
{
|
||
read_one_sym (ms, &sub_sym, &sub_aux);
|
||
name = ms->c_name;
|
||
name = (name[0] == '_' ? name + offset : name);
|
||
|
||
switch (ms->c_sclass)
|
||
{
|
||
case C_MOE:
|
||
sym = (struct symbol *) xmalloc (sizeof (struct symbol));
|
||
bzero (sym, sizeof (struct symbol));
|
||
|
||
SYMBOL_NAME (sym) = savestring (name, strlen (name));
|
||
SYMBOL_CLASS (sym) = LOC_CONST;
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
SYMBOL_VALUE (sym) = ms->c_value;
|
||
add_symbol_to_list (sym, symlist);
|
||
nsyms++;
|
||
break;
|
||
|
||
case C_EOS:
|
||
/* Sometimes the linker (on 386/ix 2.0.2 at least) screws
|
||
up the count of how many symbols to read. So stop
|
||
on .eos. */
|
||
done = 1;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Now fill in the fields of the type-structure. */
|
||
|
||
TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT;
|
||
TYPE_CODE (type) = TYPE_CODE_ENUM;
|
||
TYPE_NFIELDS (type) = nsyms;
|
||
TYPE_FIELDS (type) = (struct field *)
|
||
obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms);
|
||
|
||
/* 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. */
|
||
|
||
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) = 0;
|
||
TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol);
|
||
TYPE_FIELD_BITSIZE (type, n) = 0;
|
||
}
|
||
/* Is this Modula-2's BOOLEAN type? Flag it as such if so. */
|
||
if(TYPE_NFIELDS(type) == 2 &&
|
||
((!strcmp(TYPE_FIELD_NAME(type,0),"TRUE") &&
|
||
!strcmp(TYPE_FIELD_NAME(type,1),"FALSE")) ||
|
||
(!strcmp(TYPE_FIELD_NAME(type,1),"TRUE") &&
|
||
!strcmp(TYPE_FIELD_NAME(type,0),"FALSE"))))
|
||
TYPE_CODE(type) = TYPE_CODE_BOOL;
|
||
return type;
|
||
}
|
||
|
||
/* Register our ability to parse symbols for coff BFD files */
|
||
|
||
static struct sym_fns coff_sym_fns =
|
||
{
|
||
"coff", 4,
|
||
coff_new_init, coff_symfile_init, coff_symfile_read,
|
||
};
|
||
|
||
void
|
||
_initialize_coffread ()
|
||
{
|
||
add_symtab_fns(&coff_sym_fns);
|
||
}
|