2071 lines
58 KiB
C
2071 lines
58 KiB
C
/* Read coff symbol tables and convert to internal format, for GDB.
|
||
Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
|
||
Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993
|
||
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. */
|
||
|
||
#include "defs.h"
|
||
#include "symtab.h"
|
||
#include "gdbtypes.h"
|
||
#include "breakpoint.h"
|
||
|
||
#include "bfd.h"
|
||
#include <obstack.h>
|
||
|
||
#include <string.h>
|
||
|
||
#include <time.h> /* For time_t in libbfd.h. */
|
||
#include <sys/types.h> /* For time_t, if not in time.h. */
|
||
#include "libbfd.h" /* FIXME secret internal data from BFD */
|
||
#include "coff/internal.h" /* Internal format of COFF symbols in BFD */
|
||
#include "libcoff.h" /* FIXME secret internal data from BFD */
|
||
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "buildsym.h"
|
||
#include "gdb-stabs.h"
|
||
#include "stabsread.h"
|
||
#include "complaints.h"
|
||
|
||
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 */
|
||
|
||
asection *stabsect; /* Section pointer for .stab section */
|
||
asection *stabstrsect; /* Section pointer for .stab section */
|
||
asection *stabindexsect; /* Section pointer for .stab.index section */
|
||
char *stabstrdata;
|
||
};
|
||
|
||
/* Translate an external name string into a user-visible name. */
|
||
#define EXTERNAL_NAME(string, abfd) \
|
||
(string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string)
|
||
|
||
/* To be an sdb debug type, type must have at least a basic or primary
|
||
derived type. Using this rather than checking against T_NULL is
|
||
said to prevent core dumps if we try to operate on Michael Bloom
|
||
dbx-in-coff file. */
|
||
|
||
#define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
|
||
|
||
/*
|
||
* Convert from an sdb register number to an internal gdb register number.
|
||
* This should be defined in tm.h, if REGISTER_NAMES is not set up
|
||
* to map one to one onto the sdb register numbers.
|
||
*/
|
||
#ifndef SDB_REG_TO_REGNUM
|
||
# define SDB_REG_TO_REGNUM(value) (value)
|
||
#endif
|
||
|
||
/* Core address of start and end of text of current source file.
|
||
This comes from a ".text" symbol where x_nlinno > 0. */
|
||
|
||
static CORE_ADDR cur_src_start_addr;
|
||
static CORE_ADDR cur_src_end_addr;
|
||
|
||
/* The addresses of the symbol table stream and number of symbols
|
||
of the object file we are reading (as copied into core). */
|
||
|
||
static GDB_FILE *nlist_stream_global;
|
||
static int nlist_nsyms_global;
|
||
|
||
/* Vector of line number information. */
|
||
|
||
static struct linetable *line_vector;
|
||
|
||
/* Index of next entry to go in line_vector_index. */
|
||
|
||
static int line_vector_index;
|
||
|
||
/* Last line number recorded in the line vector. */
|
||
|
||
static int prev_line_number;
|
||
|
||
/* Number of elements allocated for line_vector currently. */
|
||
|
||
static int line_vector_length;
|
||
|
||
/* Pointers to scratch storage, used for reading raw symbols and auxents. */
|
||
|
||
static char *temp_sym;
|
||
static char *temp_aux;
|
||
|
||
/* Local variables that hold the shift and mask values for the
|
||
COFF file that we are currently reading. These come back to us
|
||
from BFD, and are referenced by their macro names, as well as
|
||
internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
|
||
macros from ../internalcoff.h . */
|
||
|
||
static unsigned local_n_btmask;
|
||
static unsigned local_n_btshft;
|
||
static unsigned local_n_tmask;
|
||
static unsigned local_n_tshift;
|
||
|
||
#define N_BTMASK local_n_btmask
|
||
#define N_BTSHFT local_n_btshft
|
||
#define N_TMASK local_n_tmask
|
||
#define N_TSHIFT local_n_tshift
|
||
|
||
/* Local variables that hold the sizes in the file of various COFF structures.
|
||
(We only need to know this to read them from the file -- BFD will then
|
||
translate the data in them, into `internal_xxx' structs in the right
|
||
byte order, alignment, etc.) */
|
||
|
||
static unsigned local_linesz;
|
||
static unsigned local_symesz;
|
||
static unsigned local_auxesz;
|
||
|
||
|
||
/* Chain of typedefs of pointers to empty struct/union types.
|
||
They are chained thru the SYMBOL_VALUE_CHAIN. */
|
||
|
||
static struct symbol *opaque_type_chain[HASHSIZE];
|
||
|
||
#if 0
|
||
/* The type of the function we are currently reading in. This is
|
||
used by define_symbol to record the type of arguments to a function. */
|
||
|
||
struct type *in_function_type;
|
||
#endif
|
||
|
||
struct pending_block *pending_blocks;
|
||
|
||
/* Complaints about various problems in the file being read */
|
||
|
||
struct complaint ef_complaint =
|
||
{"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0};
|
||
|
||
struct complaint bf_no_aux_complaint =
|
||
{"`.bf' symbol %d has no aux entry", 0, 0};
|
||
|
||
struct complaint ef_no_aux_complaint =
|
||
{"`.ef' symbol %d has no aux entry", 0, 0};
|
||
|
||
struct complaint lineno_complaint =
|
||
{"Line number pointer %d lower than start of line numbers", 0, 0};
|
||
|
||
struct complaint unexpected_type_complaint =
|
||
{"Unexpected type for symbol %s", 0, 0};
|
||
|
||
struct complaint bad_sclass_complaint =
|
||
{"Bad n_sclass for symbol %s", 0, 0};
|
||
|
||
struct complaint misordered_blocks_complaint =
|
||
{"Blocks out of order at address %x", 0, 0};
|
||
|
||
struct complaint tagndx_bad_complaint =
|
||
{"Symbol table entry for %s has bad tagndx value", 0, 0};
|
||
|
||
struct complaint eb_complaint =
|
||
{"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
|
||
|
||
/* 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;
|
||
};
|
||
|
||
static struct type *
|
||
coff_read_struct_type PARAMS ((int, int, int));
|
||
|
||
static struct type *
|
||
decode_base_type PARAMS ((struct coff_symbol *, unsigned int,
|
||
union internal_auxent *));
|
||
|
||
static struct type *
|
||
decode_type PARAMS ((struct coff_symbol *, unsigned int,
|
||
union internal_auxent *));
|
||
|
||
static struct type *
|
||
decode_function_type PARAMS ((struct coff_symbol *, unsigned int,
|
||
union internal_auxent *));
|
||
|
||
static struct type *
|
||
coff_read_enum_type PARAMS ((int, int, int));
|
||
|
||
static struct symbol *
|
||
process_coff_symbol PARAMS ((struct coff_symbol *, union internal_auxent *,
|
||
struct objfile *));
|
||
|
||
static void
|
||
patch_opaque_types PARAMS ((struct symtab *));
|
||
|
||
static void
|
||
patch_type PARAMS ((struct type *, struct type *));
|
||
|
||
static void
|
||
enter_linenos PARAMS ((long, int, int));
|
||
|
||
static void
|
||
free_linetab PARAMS ((void));
|
||
|
||
static int
|
||
init_lineno PARAMS ((int, long, int));
|
||
|
||
static char *
|
||
getsymname PARAMS ((struct internal_syment *));
|
||
|
||
static void
|
||
free_stringtab PARAMS ((void));
|
||
|
||
static int
|
||
init_stringtab PARAMS ((int, long));
|
||
|
||
static void
|
||
read_one_sym PARAMS ((struct coff_symbol *, struct internal_syment *,
|
||
union internal_auxent *));
|
||
|
||
static void
|
||
read_coff_symtab PARAMS ((long, int, struct objfile *));
|
||
|
||
static void
|
||
find_linenos PARAMS ((bfd *, sec_ptr, PTR));
|
||
|
||
static void
|
||
coff_symfile_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
coff_new_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
coff_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
|
||
|
||
static void
|
||
coff_symfile_finish PARAMS ((struct objfile *));
|
||
|
||
static void record_minimal_symbol
|
||
PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, struct objfile *));
|
||
|
||
static void
|
||
coff_end_symtab PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int));
|
||
|
||
static void
|
||
coff_start_symtab PARAMS ((void));
|
||
|
||
static void
|
||
coff_record_line PARAMS ((int, CORE_ADDR));
|
||
|
||
static struct type *
|
||
coff_alloc_type PARAMS ((int));
|
||
|
||
static struct type **
|
||
coff_lookup_type PARAMS ((int));
|
||
|
||
|
||
static void
|
||
coff_locate_sections PARAMS ((bfd *, asection *, PTR));
|
||
|
||
/* We are called once per section from coff_symfile_read. We
|
||
need to examine each section we are passed, check to see
|
||
if it is something we are interested in processing, and
|
||
if so, stash away some access information for the section.
|
||
|
||
FIXME: The section names should not be hardwired strings (what
|
||
should they be? I don't think most object file formats have enough
|
||
section flags to specify what kind of debug section it is
|
||
-kingdon). */
|
||
|
||
static void
|
||
coff_locate_sections (ignore_abfd, sectp, csip)
|
||
bfd *ignore_abfd;
|
||
asection *sectp;
|
||
PTR csip;
|
||
{
|
||
register struct coff_symfile_info *csi;
|
||
|
||
csi = (struct coff_symfile_info *) csip;
|
||
if (STREQ (sectp->name, ".stab"))
|
||
{
|
||
csi->stabsect = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, ".stabstr"))
|
||
{
|
||
csi->stabstrsect = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, ".stab.index"))
|
||
{
|
||
csi->stabindexsect = sectp;
|
||
}
|
||
}
|
||
|
||
/* Look up a coff type-number index. Return the address of the slot
|
||
where the type for that index is stored.
|
||
The type-number is in INDEX.
|
||
|
||
This can be used for finding the type associated with that index
|
||
or for associating a new type with the index. */
|
||
|
||
static struct type **
|
||
coff_lookup_type (index)
|
||
register int index;
|
||
{
|
||
if (index >= type_vector_length)
|
||
{
|
||
int old_vector_length = type_vector_length;
|
||
|
||
type_vector_length *= 2;
|
||
if (index /* is still */ >= type_vector_length) {
|
||
type_vector_length = index * 2;
|
||
}
|
||
type_vector = (struct type **)
|
||
xrealloc ((char *) type_vector,
|
||
type_vector_length * sizeof (struct type *));
|
||
memset (&type_vector[old_vector_length], 0,
|
||
(type_vector_length - old_vector_length) * sizeof(struct type *));
|
||
}
|
||
return &type_vector[index];
|
||
}
|
||
|
||
/* Make sure there is a type allocated for type number index
|
||
and return the type object.
|
||
This can create an empty (zeroed) type object. */
|
||
|
||
static struct type *
|
||
coff_alloc_type (index)
|
||
int index;
|
||
{
|
||
register struct type **type_addr = coff_lookup_type (index);
|
||
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 == NULL)
|
||
{
|
||
type = alloc_type (current_objfile);
|
||
*type_addr = type;
|
||
}
|
||
return type;
|
||
}
|
||
|
||
/* Record a line number entry for line LINE at address PC.
|
||
FIXME: Use record_line instead. */
|
||
|
||
static void
|
||
coff_record_line (line, pc)
|
||
int line;
|
||
CORE_ADDR pc;
|
||
{
|
||
struct linetable_entry *e;
|
||
/* Make sure line vector is big enough. */
|
||
|
||
if (line_vector_index + 2 >= line_vector_length)
|
||
{
|
||
line_vector_length *= 2;
|
||
line_vector = (struct linetable *)
|
||
xrealloc ((char *) line_vector, sizeof (struct linetable)
|
||
+ (line_vector_length
|
||
* sizeof (struct linetable_entry)));
|
||
}
|
||
|
||
e = line_vector->item + line_vector_index++;
|
||
e->line = line; e->pc = pc;
|
||
}
|
||
|
||
/* Start a new symtab for a new source file.
|
||
This is called when a COFF ".file" symbol is seen;
|
||
it indicates the start of data for one original source file. */
|
||
|
||
static void
|
||
coff_start_symtab ()
|
||
{
|
||
start_symtab (
|
||
/* We fill in the filename later. start_symtab
|
||
puts this pointer into last_source file and in
|
||
coff_end_symtab we assume we can free() it.
|
||
FIXME: leaks memory. */
|
||
savestring ("", 0),
|
||
/* We never know the directory name for COFF. */
|
||
NULL,
|
||
/* The start address is irrelevant, since we set
|
||
last_source_start_addr in coff_end_symtab. */
|
||
0);
|
||
|
||
/* Initialize the source file line number information for this file. */
|
||
|
||
if (line_vector) /* Unlikely, but maybe possible? */
|
||
free ((PTR)line_vector);
|
||
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 (struct linetable_entry));
|
||
}
|
||
|
||
/* Save the vital information from when starting to read a file,
|
||
for use when closing off the current file.
|
||
NAME is the file name the symbols came from, START_ADDR is the first
|
||
text address for the file, and SIZE is the number of bytes of text. */
|
||
|
||
static void
|
||
complete_symtab (name, start_addr, size)
|
||
char *name;
|
||
CORE_ADDR start_addr;
|
||
unsigned int size;
|
||
{
|
||
last_source_file = savestring (name, strlen (name));
|
||
cur_src_start_addr = start_addr;
|
||
cur_src_end_addr = start_addr + size;
|
||
|
||
if (current_objfile -> ei.entry_point >= cur_src_start_addr &&
|
||
current_objfile -> ei.entry_point < cur_src_end_addr)
|
||
{
|
||
current_objfile -> ei.entry_file_lowpc = cur_src_start_addr;
|
||
current_objfile -> ei.entry_file_highpc = cur_src_end_addr;
|
||
}
|
||
}
|
||
|
||
/* 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. */
|
||
|
||
static void
|
||
coff_end_symtab (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
struct symtab *symtab;
|
||
|
||
last_source_start_addr = cur_src_start_addr;
|
||
|
||
/* For no good reason, this file stores the number of entries in a
|
||
separate variable instead of in line_vector->nitems. Fix it. */
|
||
if (line_vector)
|
||
line_vector->nitems = line_vector_index;
|
||
|
||
/* For COFF, we only have one subfile, so we can just look at
|
||
subfiles and not worry about there being other elements in the
|
||
chain. We fill in various fields now because we didn't know them
|
||
before (or because doing it now is simply an artifact of how this
|
||
file used to be written). */
|
||
subfiles->line_vector = line_vector;
|
||
subfiles->name = last_source_file;
|
||
|
||
/* sort_pending is needed for amdcoff, at least.
|
||
sort_linevec is needed for the SCO compiler. */
|
||
symtab = end_symtab (cur_src_end_addr, 1, 1, objfile, 0);
|
||
|
||
if (symtab != NULL)
|
||
free_named_symtabs (symtab->filename);
|
||
|
||
/* Reinitialize for beginning of new file. */
|
||
line_vector = 0;
|
||
line_vector_length = -1;
|
||
last_source_file = NULL;
|
||
}
|
||
|
||
static void
|
||
record_minimal_symbol (name, address, type, objfile)
|
||
char *name;
|
||
CORE_ADDR address;
|
||
enum minimal_symbol_type type;
|
||
struct objfile *objfile;
|
||
{
|
||
/* We don't want TDESC entry points in the minimal symbol table */
|
||
if (name[0] == '@') return;
|
||
|
||
prim_record_minimal_symbol (savestring (name, strlen (name)), address, type,
|
||
objfile);
|
||
}
|
||
|
||
/* coff_symfile_init ()
|
||
is the coff-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 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). */
|
||
|
||
static int text_bfd_scnum;
|
||
|
||
static void
|
||
coff_symfile_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
asection *section;
|
||
bfd *abfd = objfile->obfd;
|
||
|
||
/* Allocate struct to keep track of stab reading. */
|
||
objfile->sym_stab_info = (PTR)
|
||
xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
|
||
|
||
memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
|
||
|
||
/* Allocate struct to keep track of the symfile */
|
||
objfile -> sym_private = xmmalloc (objfile -> md,
|
||
sizeof (struct coff_symfile_info));
|
||
|
||
memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info));
|
||
|
||
init_entry_point_info (objfile);
|
||
|
||
/* Save the section number for the text section */
|
||
section = bfd_get_section_by_name (abfd, ".text");
|
||
if (section)
|
||
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;
|
||
PTR 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 (objfile, section_offsets, mainline)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline;
|
||
{
|
||
struct coff_symfile_info *info;
|
||
struct dbx_symfile_info *dbxinfo;
|
||
bfd *abfd = 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;
|
||
struct cleanup *back_to;
|
||
int stabsize, stabstrsize;
|
||
|
||
info = (struct coff_symfile_info *) objfile -> sym_private;
|
||
dbxinfo = (struct dbx_symfile_info *) objfile->sym_stab_info;
|
||
symfile_bfd = abfd; /* Kludge for swap routines */
|
||
|
||
/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
|
||
desc = fileno ((GDB_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;
|
||
back_to = 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, (PTR) info);
|
||
|
||
make_cleanup (free_linetab, 0);
|
||
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. */
|
||
|
||
make_cleanup (free_stringtab, 0);
|
||
val = init_stringtab (desc, stringtab_offset);
|
||
if (val < 0)
|
||
error ("\"%s\": can't get string table", name);
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup (discard_minimal_symbols, 0);
|
||
|
||
/* Now that the executable file is positioned at symbol table,
|
||
process it and define symbols accordingly. */
|
||
|
||
read_coff_symtab ((long)symtab_offset, num_symbols, objfile);
|
||
|
||
/* Sort symbols alphabetically within each block. */
|
||
|
||
{
|
||
struct symtab *s;
|
||
for (s = objfile -> symtabs; s != NULL; s = s -> next)
|
||
{
|
||
sort_symtab_syms (s);
|
||
}
|
||
}
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
|
||
install_minimal_symbols (objfile);
|
||
|
||
bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info);
|
||
|
||
if (info->stabsect)
|
||
{
|
||
/* FIXME: dubious. Why can't we use something normal like
|
||
bfd_get_section_contents? */
|
||
fseek ((GDB_FILE *) abfd->iostream, abfd->where, 0);
|
||
|
||
stabsize = bfd_section_size (abfd, info->stabsect);
|
||
stabstrsize = bfd_section_size (abfd, info->stabstrsect);
|
||
|
||
coffstab_build_psymtabs (objfile,
|
||
section_offsets,
|
||
mainline,
|
||
info->stabsect->filepos, stabsize,
|
||
info->stabstrsect->filepos, stabstrsize);
|
||
}
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
coff_new_init (ignore)
|
||
struct objfile *ignore;
|
||
{
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
coff_symfile_finish (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
if (objfile -> sym_private != NULL)
|
||
{
|
||
mfree (objfile -> md, objfile -> sym_private);
|
||
}
|
||
}
|
||
|
||
|
||
/* 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 (symtab_offset, nsyms, objfile)
|
||
long symtab_offset;
|
||
int nsyms;
|
||
struct objfile *objfile;
|
||
{
|
||
GDB_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;
|
||
struct symtab *s;
|
||
|
||
/* A .file is open. */
|
||
int in_source_file = 0;
|
||
int next_file_symnum = -1;
|
||
|
||
/* Name of the current file. */
|
||
char *filestring = "";
|
||
int depth = 0;
|
||
int fcn_first_line = 0;
|
||
int fcn_last_line = 0;
|
||
int fcn_start_addr = 0;
|
||
long fcn_line_ptr = 0;
|
||
int val;
|
||
|
||
stream = bfd_cache_lookup(objfile->obfd);
|
||
if (!stream)
|
||
perror_with_name(objfile->name);
|
||
|
||
/* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
|
||
it's hard to know I've really worked around it. The fix should be
|
||
harmless, anyway). The symptom of the bug is that the first
|
||
fread (in read_one_sym), will (in my example) actually get data
|
||
from file offset 268, when the fseek was to 264 (and ftell shows
|
||
264). This causes all hell to break loose. I was unable to
|
||
reproduce this on a short test program which operated on the same
|
||
file, performing (I think) the same sequence of operations.
|
||
|
||
It stopped happening when I put in this rewind().
|
||
|
||
FIXME: Find out if this has been reported to Sun, whether it has
|
||
been fixed in a later release, etc. */
|
||
|
||
rewind (stream);
|
||
|
||
/* Position to read the symbol table. */
|
||
val = fseek (stream, (long)symtab_offset, 0);
|
||
if (val < 0)
|
||
perror_with_name (objfile->name);
|
||
|
||
current_objfile = objfile;
|
||
nlist_stream_global = stream;
|
||
nlist_nsyms_global = nsyms;
|
||
last_source_file = NULL;
|
||
memset (opaque_type_chain, 0, sizeof opaque_type_chain);
|
||
|
||
if (type_vector) /* Get rid of previous one */
|
||
free ((PTR)type_vector);
|
||
type_vector_length = 160;
|
||
type_vector = (struct type **)
|
||
xmalloc (type_vector_length * sizeof (struct type *));
|
||
memset (type_vector, 0, type_vector_length * sizeof (struct type *));
|
||
|
||
coff_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)
|
||
coff_end_symtab (objfile);
|
||
|
||
coff_start_symtab ();
|
||
complete_symtab ("_globals_", 0, 0);
|
||
/* 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 all functions -- external and static -- in minsyms. */
|
||
record_minimal_symbol (cs->c_name, cs->c_value, mst_text, objfile);
|
||
|
||
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;
|
||
if (cs->c_naux > 0)
|
||
filestring = coff_getfilename (&main_aux);
|
||
else
|
||
filestring = "";
|
||
|
||
/*
|
||
* Complete symbol table for last object file
|
||
* containing debugging information.
|
||
*/
|
||
if (last_source_file)
|
||
{
|
||
coff_end_symtab (objfile);
|
||
coff_start_symtab ();
|
||
}
|
||
in_source_file = 1;
|
||
break;
|
||
|
||
case C_STAT:
|
||
if (cs->c_name[0] == '.') {
|
||
if (STREQ (cs->c_name, ".text")) {
|
||
/* FIXME: don't wire in ".text" as section name
|
||
or symbol name! */
|
||
/* 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:
|
||
/* Record external symbols in minsyms if we don't have debug
|
||
info for them. FIXME, this is probably the wrong thing
|
||
to do. Why don't we record them even if we do have
|
||
debug symbol info? What really belongs in the minsyms
|
||
anyway? Fred!?? */
|
||
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 function in the minimal symbol table.
|
||
But why are absolute syms recorded as functions, anyway? */
|
||
if (cs->c_secnum <= text_bfd_scnum+1) {/* text or abs */
|
||
record_minimal_symbol (cs->c_name, cs->c_value,
|
||
mst_text, objfile);
|
||
break;
|
||
} else {
|
||
record_minimal_symbol (cs->c_name, cs->c_value,
|
||
mst_data, objfile);
|
||
break;
|
||
}
|
||
}
|
||
process_coff_symbol (cs, &main_aux, objfile);
|
||
break;
|
||
|
||
case C_FCN:
|
||
if (STREQ (cs->c_name, ".bf"))
|
||
{
|
||
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;
|
||
|
||
/* Might want to check that locals are 0 and
|
||
context_stack_depth is zero, and complain if not. */
|
||
|
||
depth = 0;
|
||
new = push_context (depth, fcn_start_addr);
|
||
fcn_cs_saved.c_name = getsymname (&fcn_sym_saved);
|
||
new->name = process_coff_symbol (&fcn_cs_saved,
|
||
&fcn_aux_saved, objfile);
|
||
}
|
||
else if (STREQ (cs->c_name, ".ef"))
|
||
{
|
||
/* 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 = pop_context ();
|
||
/* Stack must be empty now. */
|
||
if (context_stack_depth > 0 || new == NULL)
|
||
{
|
||
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
|
||
objfile
|
||
);
|
||
within_function = 0;
|
||
}
|
||
break;
|
||
|
||
case C_BLOCK:
|
||
if (STREQ (cs->c_name, ".bb"))
|
||
{
|
||
push_context (++depth, cs->c_value);
|
||
}
|
||
else if (STREQ (cs->c_name, ".eb"))
|
||
{
|
||
new = pop_context ();
|
||
if (depth-- != new->depth)
|
||
{
|
||
complain (&eb_complaint, symnum);
|
||
break;
|
||
}
|
||
if (local_symbols && context_stack_depth > 0)
|
||
{
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (0, &local_symbols, new->old_blocks,
|
||
new->start_addr, cs->c_value, objfile);
|
||
}
|
||
/* Now pop locals of block just finished. */
|
||
local_symbols = new->locals;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
process_coff_symbol (cs, &main_aux, objfile);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (last_source_file)
|
||
coff_end_symtab (objfile);
|
||
|
||
/* Patch up any opaque types (references to types that are not defined
|
||
in the file where they are referenced, e.g. "struct foo *bar"). */
|
||
ALL_OBJFILE_SYMTABS (objfile, s)
|
||
patch_opaque_types (s);
|
||
|
||
current_objfile = NULL;
|
||
}
|
||
|
||
/* 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,
|
||
0, cs->c_naux, (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];
|
||
|
||
free_stringtab ();
|
||
|
||
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 lengthbuf || length < sizeof lengthbuf)
|
||
return 0;
|
||
|
||
stringtab = (char *) xmalloc (length);
|
||
memcpy (stringtab, &length, sizeof length);
|
||
if (length == sizeof length) /* Empty table -- just the count */
|
||
return 0;
|
||
|
||
val = myread (chan, stringtab + sizeof lengthbuf, length - sizeof lengthbuf);
|
||
if (val != length - sizeof lengthbuf || 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;
|
||
}
|
||
|
||
/* Extract the file name from the aux entry of a C_FILE symbol. Return
|
||
only the last component of the name. Result is in static storage and
|
||
is only good for temporary use. */
|
||
|
||
char *
|
||
coff_getfilename (aux_entry)
|
||
union internal_auxent *aux_entry;
|
||
{
|
||
static char buffer[BUFSIZ];
|
||
register char *temp;
|
||
char *result;
|
||
|
||
if (aux_entry->x_file.x_n.x_zeroes == 0)
|
||
strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset);
|
||
else
|
||
{
|
||
strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
|
||
buffer[FILNMLEN] = '\0';
|
||
}
|
||
result = buffer;
|
||
if ((temp = strrchr (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;
|
||
|
||
free_linetab();
|
||
|
||
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 */
|
||
memset (linetab + size, 0, local_linesz);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
free_linetab ()
|
||
{
|
||
if (linetab)
|
||
free (linetab);
|
||
linetab = NULL;
|
||
}
|
||
|
||
#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)
|
||
coff_record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr);
|
||
else
|
||
break;
|
||
}
|
||
}
|
||
|
||
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 *) TYPE_ALLOC (target, field_size);
|
||
|
||
memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_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 (s)
|
||
struct symtab *s;
|
||
{
|
||
register struct block *b;
|
||
register int i;
|
||
register struct symbol *real_sym;
|
||
|
||
/* Go through the per-file symbols only */
|
||
b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
|
||
for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
|
||
{
|
||
/* 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] &&
|
||
STREQ (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, objfile)
|
||
register struct coff_symbol *cs;
|
||
register union internal_auxent *aux;
|
||
struct objfile *objfile;
|
||
{
|
||
register struct symbol *sym
|
||
= (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
|
||
sizeof (struct symbol));
|
||
char *name;
|
||
struct type *temptype;
|
||
|
||
memset (sym, 0, sizeof (struct symbol));
|
||
name = cs->c_name;
|
||
name = EXTERNAL_NAME (name, objfile->obfd);
|
||
SYMBOL_NAME (sym) = obstack_copy0 (&objfile->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 (&objfile->symbol_obstack, sizeof (struct type));
|
||
|
||
memcpy (new, lookup_function_type (decode_function_type (cs, cs->c_type, aux)),
|
||
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) && (TARGET_BYTE_ORDER == BIG_ENDIAN)
|
||
/* If PCC says a parameter is a short or a char,
|
||
aligned on an int boundary, realign it to the "little end"
|
||
of the int. */
|
||
temptype = lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
|
||
&& TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
|
||
&& 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype))
|
||
{
|
||
SYMBOL_VALUE (sym) += TYPE_LENGTH (temptype)
|
||
- TYPE_LENGTH (SYMBOL_TYPE (sym));
|
||
}
|
||
#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)
|
||
/* FIXME: This should retain the current type, since it's just
|
||
a register value. gnu@adobe, 26Feb93 */
|
||
/* If PCC says a parameter is a short or a char,
|
||
it is really an int. */
|
||
temptype = lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
|
||
&& TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
|
||
{
|
||
SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym))
|
||
? lookup_fundamental_type (current_objfile,
|
||
FT_UNSIGNED_INTEGER)
|
||
: temptype;
|
||
}
|
||
#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_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. A
|
||
simple forward reference (TYPE_CODE_UNDEF) is not an
|
||
empty structured type, though; the forward references
|
||
work themselves out via the magic of coff_lookup_type. */
|
||
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR &&
|
||
TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 &&
|
||
TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) !=
|
||
TYPE_CODE_UNDEF)
|
||
{
|
||
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;
|
||
|
||
/* Some compilers try to be helpful by inventing "fake"
|
||
names for anonymous enums, structures, and unions, like
|
||
"~0fake" or ".0fake". Thanks, but no thanks... */
|
||
if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
|
||
if (SYMBOL_NAME(sym) != NULL
|
||
&& *SYMBOL_NAME(sym) != '~'
|
||
&& *SYMBOL_NAME(sym) != '.')
|
||
TYPE_TAG_NAME (SYMBOL_TYPE (sym)) =
|
||
concat (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, *index_type, *range_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;
|
||
|
||
base_type = decode_type (cs, new_c_type, aux);
|
||
index_type = lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
range_type =
|
||
create_range_type ((struct type *) NULL, index_type, 0, n - 1);
|
||
type =
|
||
create_array_type ((struct type *) NULL, base_type, range_type);
|
||
}
|
||
return type;
|
||
}
|
||
|
||
/* Reference to existing type. This only occurs with the
|
||
struct, union, and enum types. EPI a29k coff
|
||
fakes us out by producing aux entries with a nonzero
|
||
x_tagndx for definitions of structs, unions, and enums, so we
|
||
have to check the c_sclass field. SCO 3.2v4 cc gets confused
|
||
with pointers to pointers to defined structs, and generates
|
||
negative x_tagndx fields. */
|
||
if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0)
|
||
{
|
||
if (cs->c_sclass != C_STRTAG
|
||
&& cs->c_sclass != C_UNTAG
|
||
&& cs->c_sclass != C_ENTAG
|
||
&& aux->x_sym.x_tagndx.l >= 0)
|
||
{
|
||
type = coff_alloc_type (aux->x_sym.x_tagndx.l);
|
||
return type;
|
||
} else {
|
||
complain (&tagndx_bad_complaint, cs->c_name);
|
||
/* And fall through to decode_base_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 lookup_fundamental_type (current_objfile, FT_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 lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */
|
||
#endif
|
||
#endif /* 0 */
|
||
|
||
#ifdef T_VOID
|
||
case T_VOID:
|
||
/* Intel 960 COFF has this symbol and meaning. */
|
||
return lookup_fundamental_type (current_objfile, FT_VOID);
|
||
#endif
|
||
|
||
case T_CHAR:
|
||
return lookup_fundamental_type (current_objfile, FT_CHAR);
|
||
|
||
case T_SHORT:
|
||
return lookup_fundamental_type (current_objfile, FT_SHORT);
|
||
|
||
case T_INT:
|
||
return lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
|
||
case T_LONG:
|
||
return lookup_fundamental_type (current_objfile, FT_LONG);
|
||
|
||
case T_FLOAT:
|
||
return lookup_fundamental_type (current_objfile, FT_FLOAT);
|
||
|
||
case T_DOUBLE:
|
||
return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
|
||
|
||
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) = NULL;
|
||
/* This used to set the tag to "<opaque>". But I think setting it
|
||
to NULL is right, and the printing code can print it as
|
||
"struct {...}". */
|
||
TYPE_TAG_NAME (type) = NULL;
|
||
INIT_CPLUS_SPECIFIC(type);
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_FIELDS (type) = 0;
|
||
TYPE_NFIELDS (type) = 0;
|
||
}
|
||
else
|
||
{
|
||
type = coff_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) = NULL;
|
||
/* This used to set the tag to "<opaque>". But I think setting it
|
||
to NULL is right, and the printing code can print it as
|
||
"union {...}". */
|
||
TYPE_TAG_NAME (type) = NULL;
|
||
INIT_CPLUS_SPECIFIC(type);
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_FIELDS (type) = 0;
|
||
TYPE_NFIELDS (type) = 0;
|
||
}
|
||
else
|
||
{
|
||
type = coff_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:
|
||
if (cs->c_naux != 1)
|
||
{
|
||
/* anonymous enum type */
|
||
type = coff_alloc_type (cs->c_symnum);
|
||
TYPE_CODE (type) = TYPE_CODE_ENUM;
|
||
TYPE_NAME (type) = NULL;
|
||
/* This used to set the tag to "<opaque>". But I think setting it
|
||
to NULL is right, and the printing code can print it as
|
||
"enum {...}". */
|
||
TYPE_TAG_NAME (type) = NULL;
|
||
TYPE_LENGTH (type) = 0;
|
||
TYPE_FIELDS (type) = 0;
|
||
TYPE_NFIELDS(type) = 0;
|
||
}
|
||
else
|
||
{
|
||
type = coff_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);
|
||
}
|
||
return type;
|
||
|
||
case T_MOE:
|
||
/* shouldn't show up here */
|
||
break;
|
||
|
||
case T_UCHAR:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
|
||
|
||
case T_USHORT:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
|
||
|
||
case T_UINT:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
|
||
|
||
case T_ULONG:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
|
||
}
|
||
complain (&unexpected_type_complaint, cs->c_name);
|
||
return lookup_fundamental_type (current_objfile, FT_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 *
|
||
coff_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;
|
||
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 = EXTERNAL_NAME (name, current_objfile->obfd);
|
||
|
||
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 *)
|
||
TYPE_ALLOC (type, 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. */
|
||
|
||
/* ARGSUSED */
|
||
static struct type *
|
||
coff_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;
|
||
int o_nsyms;
|
||
register int n;
|
||
char *name;
|
||
|
||
type = coff_alloc_type (index);
|
||
if (within_function)
|
||
symlist = &local_symbols;
|
||
else
|
||
symlist = &file_symbols;
|
||
osyms = *symlist;
|
||
o_nsyms = osyms ? osyms->nsyms : 0;
|
||
|
||
while (!done && symnum < lastsym && symnum < nlist_nsyms_global)
|
||
{
|
||
read_one_sym (ms, &sub_sym, &sub_aux);
|
||
name = ms->c_name;
|
||
name = EXTERNAL_NAME (name, current_objfile->obfd);
|
||
|
||
switch (ms->c_sclass)
|
||
{
|
||
case C_MOE:
|
||
sym = (struct symbol *) xmalloc (sizeof (struct symbol));
|
||
memset (sym, 0, 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. */
|
||
|
||
if (length > 0)
|
||
TYPE_LENGTH (type) = length;
|
||
else
|
||
TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */
|
||
TYPE_CODE (type) = TYPE_CODE_ENUM;
|
||
TYPE_NFIELDS (type) = nsyms;
|
||
TYPE_FIELDS (type) = (struct field *)
|
||
TYPE_ALLOC (type, 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. */
|
||
/* Note that we preserve the order of the enum constants, so
|
||
that in something like "enum {FOO, LAST_THING=FOO}" we print
|
||
FOO, not LAST_THING. */
|
||
|
||
for (syms = *symlist, n = 0; syms; syms = syms->next)
|
||
{
|
||
int j = 0;
|
||
if (syms == osyms)
|
||
j = o_nsyms;
|
||
for (; j < syms->nsyms; j++,n++)
|
||
{
|
||
struct symbol *xsym = syms->symbol[j];
|
||
SYMBOL_TYPE (xsym) = type;
|
||
TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym);
|
||
TYPE_FIELD_VALUE (type, n) = 0;
|
||
TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
|
||
TYPE_FIELD_BITSIZE (type, n) = 0;
|
||
}
|
||
if (syms == osyms)
|
||
break;
|
||
}
|
||
|
||
#if 0
|
||
/* This screws up perfectly good C programs with enums. FIXME. */
|
||
/* Is this Modula-2's BOOLEAN type? Flag it as such if so. */
|
||
if(TYPE_NFIELDS(type) == 2 &&
|
||
((STREQ(TYPE_FIELD_NAME(type,0),"TRUE") &&
|
||
STREQ(TYPE_FIELD_NAME(type,1),"FALSE")) ||
|
||
(STREQ(TYPE_FIELD_NAME(type,1),"TRUE") &&
|
||
STREQ(TYPE_FIELD_NAME(type,0),"FALSE"))))
|
||
TYPE_CODE(type) = TYPE_CODE_BOOL;
|
||
#endif
|
||
return type;
|
||
}
|
||
|
||
struct section_offsets *
|
||
coff_symfile_offsets (objfile, addr)
|
||
struct objfile *objfile;
|
||
CORE_ADDR addr;
|
||
{
|
||
struct section_offsets *section_offsets;
|
||
int i;
|
||
|
||
objfile->num_sections = SECT_OFF_MAX;
|
||
section_offsets = (struct section_offsets *)
|
||
obstack_alloc (&objfile -> psymbol_obstack,
|
||
sizeof (struct section_offsets)
|
||
+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
|
||
|
||
for (i = 0; i < SECT_OFF_MAX; i++)
|
||
ANOFFSET (section_offsets, i) = addr;
|
||
|
||
return section_offsets;
|
||
}
|
||
|
||
/* Register our ability to parse symbols for coff BFD files */
|
||
|
||
static struct sym_fns coff_sym_fns =
|
||
{
|
||
bfd_target_coff_flavour,
|
||
coff_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
||
coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
||
coff_symfile_read, /* sym_read: read a symbol file into symtab */
|
||
coff_symfile_finish, /* sym_finish: finished with file, cleanup */
|
||
coff_symfile_offsets, /* sym_offsets: xlate external to internal form */
|
||
NULL /* next: pointer to next struct sym_fns */
|
||
};
|
||
|
||
void
|
||
_initialize_coffread ()
|
||
{
|
||
add_symtab_fns(&coff_sym_fns);
|
||
}
|