987622b523
(MMALLOC_SRC): Define. (MMALLOC_CFLAGS): Use. (ser-mac.o): Add rule. * dwarfread.c, somread.c, ultra3-nat.c, xcoffread.c: Replace L_SET with SEEK_SET in all calls to bfd_seek. * scm-tags.h (scm_tags): Remove excess comma.
468 lines
14 KiB
C
468 lines
14 KiB
C
/* Read HP PA/Risc object files for GDB.
|
||
Copyright 1991, 1992 Free Software Foundation, Inc.
|
||
Written by Fred Fish at Cygnus Support.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "bfd.h"
|
||
#include "som.h"
|
||
#include "libhppa.h"
|
||
#include <syms.h>
|
||
#include "symtab.h"
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "buildsym.h"
|
||
#include "stabsread.h"
|
||
#include "gdb-stabs.h"
|
||
#include "complaints.h"
|
||
#include "gdb_string.h"
|
||
#include "demangle.h"
|
||
#include <sys/file.h>
|
||
|
||
/* Various things we might complain about... */
|
||
|
||
static void
|
||
som_symfile_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
som_new_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
som_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
|
||
|
||
static void
|
||
som_symfile_finish PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
som_symtab_read PARAMS ((bfd *, struct objfile *,
|
||
struct section_offsets *));
|
||
|
||
static struct section_offsets *
|
||
som_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
|
||
|
||
static void
|
||
record_minimal_symbol PARAMS ((char *, CORE_ADDR,
|
||
enum minimal_symbol_type,
|
||
struct objfile *));
|
||
|
||
static void
|
||
record_minimal_symbol (name, address, ms_type, objfile)
|
||
char *name;
|
||
CORE_ADDR address;
|
||
enum minimal_symbol_type ms_type;
|
||
struct objfile *objfile;
|
||
{
|
||
name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
|
||
prim_record_minimal_symbol (name, address, ms_type, objfile);
|
||
}
|
||
|
||
/*
|
||
|
||
LOCAL FUNCTION
|
||
|
||
som_symtab_read -- read the symbol table of a SOM file
|
||
|
||
SYNOPSIS
|
||
|
||
void som_symtab_read (bfd *abfd, struct objfile *objfile,
|
||
struct section_offsets *section_offsets)
|
||
|
||
DESCRIPTION
|
||
|
||
Given an open bfd, a base address to relocate symbols to, and a
|
||
flag that specifies whether or not this bfd is for an executable
|
||
or not (may be shared library for example), add all the global
|
||
function and data symbols to the minimal symbol table.
|
||
*/
|
||
|
||
static void
|
||
som_symtab_read (abfd, objfile, section_offsets)
|
||
bfd *abfd;
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
{
|
||
unsigned int number_of_symbols;
|
||
int val, dynamic;
|
||
char *stringtab;
|
||
asection *shlib_info;
|
||
struct symbol_dictionary_record *buf, *bufp, *endbufp;
|
||
char *symname;
|
||
CONST int symsize = sizeof (struct symbol_dictionary_record);
|
||
CORE_ADDR text_offset, data_offset;
|
||
|
||
|
||
text_offset = ANOFFSET (section_offsets, 0);
|
||
data_offset = ANOFFSET (section_offsets, 1);
|
||
|
||
number_of_symbols = bfd_get_symcount (abfd);
|
||
|
||
buf = alloca (symsize * number_of_symbols);
|
||
bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET);
|
||
val = bfd_read (buf, symsize * number_of_symbols, 1, abfd);
|
||
if (val != symsize * number_of_symbols)
|
||
error ("Couldn't read symbol dictionary!");
|
||
|
||
stringtab = alloca (obj_som_stringtab_size (abfd));
|
||
bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET);
|
||
val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd);
|
||
if (val != obj_som_stringtab_size (abfd))
|
||
error ("Can't read in HP string table.");
|
||
|
||
/* We need to determine if objfile is a dynamic executable (so we
|
||
can do the right thing for ST_ENTRY vs ST_CODE symbols).
|
||
|
||
There's nothing in the header which easily allows us to do
|
||
this. The only reliable way I know of is to check for the
|
||
existance of a $SHLIB_INFO$ section with a non-zero size. */
|
||
shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
|
||
if (shlib_info)
|
||
dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0);
|
||
else
|
||
dynamic = 0;
|
||
|
||
endbufp = buf + number_of_symbols;
|
||
for (bufp = buf; bufp < endbufp; ++bufp)
|
||
{
|
||
enum minimal_symbol_type ms_type;
|
||
|
||
QUIT;
|
||
|
||
switch (bufp->symbol_scope)
|
||
{
|
||
case SS_UNIVERSAL:
|
||
case SS_EXTERNAL:
|
||
switch (bufp->symbol_type)
|
||
{
|
||
case ST_SYM_EXT:
|
||
case ST_ARG_EXT:
|
||
continue;
|
||
|
||
case ST_CODE:
|
||
case ST_PRI_PROG:
|
||
case ST_SEC_PROG:
|
||
case ST_MILLICODE:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
ms_type = mst_text;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
case ST_ENTRY:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
/* For a dynamic executable, ST_ENTRY symbols are
|
||
the stubs, while the ST_CODE symbol is the real
|
||
function. */
|
||
if (dynamic)
|
||
ms_type = mst_solib_trampoline;
|
||
else
|
||
ms_type = mst_text;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
case ST_STUB:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
ms_type = mst_solib_trampoline;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
case ST_DATA:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
bufp->symbol_value += data_offset;
|
||
ms_type = mst_data;
|
||
break;
|
||
default:
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
#if 0
|
||
/* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */
|
||
case SS_GLOBAL:
|
||
#endif
|
||
case SS_LOCAL:
|
||
switch (bufp->symbol_type)
|
||
{
|
||
case ST_SYM_EXT:
|
||
case ST_ARG_EXT:
|
||
continue;
|
||
|
||
case ST_CODE:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
ms_type = mst_file_text;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
|
||
check_strange_names:
|
||
/* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local
|
||
label prefixes for stabs, constant data, etc. So we need
|
||
only filter out L$ symbols which are left in due to
|
||
limitations in how GAS generates SOM relocations.
|
||
|
||
When linking in the HPUX C-library the HP linker has
|
||
the nasty habit of placing section symbols from the literal
|
||
subspaces in the middle of the program's text. Filter
|
||
those out as best we can. Check for first and last character
|
||
being '$'.
|
||
|
||
And finally, the newer HP compilers emit crud like $PIC_foo$N
|
||
in some circumstance (PIC code I guess). It's also claimed
|
||
that they emit D$ symbols too. What stupidity. */
|
||
if ((symname[0] == 'L' && symname[1] == '$')
|
||
|| (symname[0] == '$' && symname[strlen(symname) - 1] == '$')
|
||
|| (symname[0] == 'D' && symname[1] == '$')
|
||
|| (strncmp (symname, "$PIC", 4) == 0))
|
||
continue;
|
||
break;
|
||
|
||
case ST_PRI_PROG:
|
||
case ST_SEC_PROG:
|
||
case ST_MILLICODE:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
ms_type = mst_file_text;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
case ST_ENTRY:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
/* For a dynamic executable, ST_ENTRY symbols are
|
||
the stubs, while the ST_CODE symbol is the real
|
||
function. */
|
||
if (dynamic)
|
||
ms_type = mst_solib_trampoline;
|
||
else
|
||
ms_type = mst_file_text;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
case ST_STUB:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
ms_type = mst_solib_trampoline;
|
||
bufp->symbol_value += text_offset;
|
||
#ifdef SMASH_TEXT_ADDRESS
|
||
SMASH_TEXT_ADDRESS (bufp->symbol_value);
|
||
#endif
|
||
break;
|
||
|
||
|
||
case ST_DATA:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
bufp->symbol_value += data_offset;
|
||
ms_type = mst_file_data;
|
||
goto check_strange_names;
|
||
|
||
default:
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
/* This can happen for common symbols when -E is passed to the
|
||
final link. No idea _why_ that would make the linker force
|
||
common symbols to have an SS_UNSAT scope, but it does. */
|
||
case SS_UNSAT:
|
||
switch (bufp->symbol_type)
|
||
{
|
||
case ST_STORAGE:
|
||
symname = bufp->name.n_strx + stringtab;
|
||
bufp->symbol_value += data_offset;
|
||
ms_type = mst_data;
|
||
break;
|
||
|
||
default:
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
continue;
|
||
}
|
||
|
||
if (bufp->name.n_strx > obj_som_stringtab_size (abfd))
|
||
error ("Invalid symbol data; bad HP string table offset: %d",
|
||
bufp->name.n_strx);
|
||
|
||
record_minimal_symbol (symname,
|
||
bufp->symbol_value, ms_type,
|
||
objfile);
|
||
}
|
||
}
|
||
|
||
/* Scan and build partial symbols for a symbol file.
|
||
We have been initialized by a call to som_symfile_init, which
|
||
currently does nothing.
|
||
|
||
SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
|
||
in each section. This is ignored, as it isn't needed for SOM.
|
||
|
||
MAINLINE is true if we are reading the main symbol
|
||
table (as opposed to a shared lib or dynamically loaded file).
|
||
|
||
This function only does the minimum work necessary for letting the
|
||
user "name" things symbolically; it does not read the entire symtab.
|
||
Instead, it reads the external and static symbols and puts them in partial
|
||
symbol tables. When more extensive information is requested of a
|
||
file, the corresponding partial symbol table is mutated into a full
|
||
fledged symbol table by going back and reading the symbols
|
||
for real.
|
||
|
||
We look for sections with specific names, to tell us what debug
|
||
format to look for: FIXME!!!
|
||
|
||
somstab_build_psymtabs() handles STABS symbols.
|
||
|
||
Note that SOM files have a "minimal" symbol table, which is vaguely
|
||
reminiscent of a COFF symbol table, but has only the minimal information
|
||
necessary for linking. We process this also, and use the information to
|
||
build gdb's minimal symbol table. This gives us some minimal debugging
|
||
capability even for files compiled without -g. */
|
||
|
||
static void
|
||
som_symfile_read (objfile, section_offsets, mainline)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline;
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
struct cleanup *back_to;
|
||
|
||
init_minimal_symbol_collection ();
|
||
back_to = make_cleanup (discard_minimal_symbols, 0);
|
||
|
||
/* Process the normal SOM symbol table first. */
|
||
|
||
som_symtab_read (abfd, objfile, section_offsets);
|
||
|
||
/* Now read information from the stabs debug sections. */
|
||
stabsect_build_psymtabs (objfile, section_offsets, mainline,
|
||
"$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
|
||
|
||
/* Now read the native debug information. */
|
||
hpread_build_psymtabs (objfile, section_offsets, mainline);
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
install_minimal_symbols (objfile);
|
||
|
||
/* Force hppa-tdep.c to re-read the unwind descriptors. */
|
||
objfile->obj_private = NULL;
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Initialize anything that needs initializing when a completely new symbol
|
||
file is specified (not just adding some symbols from another file, e.g. a
|
||
shared library).
|
||
|
||
We reinitialize buildsym, since we may be reading stabs from a SOM file. */
|
||
|
||
static void
|
||
som_new_init (ignore)
|
||
struct objfile *ignore;
|
||
{
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
som_symfile_finish (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
if (objfile -> sym_stab_info != NULL)
|
||
{
|
||
mfree (objfile -> md, objfile -> sym_stab_info);
|
||
}
|
||
hpread_symfile_finish (objfile);
|
||
}
|
||
|
||
/* SOM specific initialization routine for reading symbols.
|
||
|
||
Nothing SOM specific left to do anymore. */
|
||
static void
|
||
som_symfile_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
hpread_symfile_init (objfile);
|
||
}
|
||
|
||
/* SOM specific parsing routine for section offsets.
|
||
|
||
Plain and simple for now. */
|
||
|
||
static struct section_offsets *
|
||
som_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));
|
||
|
||
/* First see if we're a shared library. If so, get the section
|
||
offsets from the library, else get them from addr. */
|
||
if (!som_solib_section_offsets (objfile, section_offsets))
|
||
{
|
||
for (i = 0; i < SECT_OFF_MAX; i++)
|
||
ANOFFSET (section_offsets, i) = addr;
|
||
}
|
||
|
||
return section_offsets;
|
||
}
|
||
|
||
/* Register that we are able to handle SOM object file formats. */
|
||
|
||
static struct sym_fns som_sym_fns =
|
||
{
|
||
bfd_target_som_flavour,
|
||
som_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
||
som_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
||
som_symfile_read, /* sym_read: read a symbol file into symtab */
|
||
som_symfile_finish, /* sym_finish: finished with file, cleanup */
|
||
som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
|
||
NULL /* next: pointer to next struct sym_fns */
|
||
};
|
||
|
||
void
|
||
_initialize_somread ()
|
||
{
|
||
add_symtab_fns (&som_sym_fns);
|
||
}
|