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* somread.c: Renamed from paread.c. Changed function names and 

comments to reflect that this file deals with SOM (an object file
	format), rather than the PA (a cpu).
	(Makefile.in): Chaned appropriately.
	(config/pa/hppabsd.mh, config/pa/hppahpux.mh): Likewise.
	* dbxread.c (somstab_build_psymtabs): Renamed from
	pastab_build_psymtabs.
This commit is contained in:
Jeff Law 1994-06-27 06:09:40 +00:00
parent 6dde66d569
commit bfe2f12bd0
9 changed files with 590 additions and 574 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
gdb/.Sanitize
View File

@ -215,7 +215,6 @@ objfiles.c
objfiles.h
os9kread.c
osfsolib.c
paread.c
parse.c
parser-defs.h
partial-stab.h
@ -261,6 +260,7 @@ sh-tdep.c
signals.h
solib.c
solib.h
somread.c
source.c
sp64-tdep.c
sparc-nat.c

10
gdb/ChangeLog
View File

@ -1,3 +1,13 @@
Sun Jun 26 23:54:08 1994 Jeff Law (law@snake.cs.utah.edu)
* somread.c: Renamed from paread.c. Changed function names and
comments to reflect that this file deals with SOM (an object file
format), rather than the PA (a cpu).
(Makefile.in): Chaned appropriately.
(config/pa/hppabsd.mh, config/pa/hppahpux.mh): Likewise.
* dbxread.c (somstab_build_psymtabs): Renamed from
pastab_build_psymtabs.
Fri Jun 24 08:15:42 1994 Peter Schauer (pes@regent.e-technik.tu-muenchen.de)
* core-sol2.c: New file to handle ELF and BCP core file flavours.

4
gdb/ChangeLog.mpw
View File

@ -1,3 +1,7 @@
Sun Jun 26 23:56:19 1994 Jeff Law (law@snake.cs.utah.edu)
* mpw-make.in: Change references from paread.c to somread.c
Wed Jun 22 11:10:27 1994 Stan Shebs (shebs@andros.cygnus.com)
* mpw-make.in (VERSION): Update to 4.12.3.

2
gdb/config/pa/hppabsd.mh
View File

@ -2,4 +2,4 @@
XDEPFILES=
XM_FILE= xm-hppab.h
NAT_FILE= nm-hppab.h
NATDEPFILES= hppab-nat.o coredep.o corelow.o exec.o inftarg.o fork-child.o paread.o infptrace.o
NATDEPFILES= hppab-nat.o coredep.o corelow.o exec.o inftarg.o fork-child.o somread.o infptrace.o

2
gdb/config/pa/hppahpux.mh
View File

@ -3,7 +3,7 @@ TERMCAP = -lcurses
XDEPFILES=
XM_FILE= xm-hppah.h
NAT_FILE= nm-hppah.h
NATDEPFILES= hppah-nat.o coredep.o corelow.o inftarg.o fork-child.o paread.o infptrace.o
NATDEPFILES= hppah-nat.o coredep.o corelow.o inftarg.o fork-child.o somread.o infptrace.o
REGEX=regex.o
REGEX1=regex.o
HOST_IPC=-DBSD_IPC -DPOSIX_WAIT

46
gdb/dbxread.c
View File

@ -144,6 +144,11 @@ static unsigned int next_file_string_table_offset;
text addresses at location 0. */
static int symfile_relocatable = 0;
/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
to the function start address. */
static int block_address_function_relative = 0;
/* This is the lowest text address we have yet encountered. */
static CORE_ADDR lowest_text_address;
@ -483,7 +488,7 @@ record_minimal_symbol (name, address, type, objfile)
break;
}
if (ms_type == mst_file_text || ms_type == mst_text
if ((ms_type == mst_file_text || ms_type == mst_text)
&& address < lowest_text_address)
lowest_text_address = address;
@ -528,6 +533,16 @@ dbx_symfile_read (objfile, section_offsets, mainline)
|| strcmp (&objfile->name[val-4], ".nlm") == 0)
symfile_relocatable = 1;
/* This is true for Solaris (and all other systems which put stabs
in sections, hopefully, since it would be silly to do things
differently from Solaris), and false for SunOS4 and other a.out
file formats. */
block_address_function_relative =
((0 == strncmp (bfd_get_target (objfile->obfd), "elf", 3))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "som", 3))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "coff", 4))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "nlm", 3)));
sym_bfd = objfile->obfd;
val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
if (val < 0)
@ -1222,7 +1237,6 @@ end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
int number_dependencies;
{
int i;
struct partial_symtab *p1;
struct objfile *objfile = pst -> objfile;
if (capping_symbol_offset != -1)
@ -1307,6 +1321,8 @@ end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
own ending address to our starting address, nor to set addresses on
`dependency' files that have both textlow and texthigh zero. */
if (pst->textlow) {
struct partial_symtab *p1;
ALL_OBJFILE_PSYMTABS (objfile, p1) {
if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
p1->texthigh = pst->textlow;
@ -1712,10 +1728,6 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile)
used to relocate these symbol types rather than SECTION_OFFSETS. */
static CORE_ADDR function_start_offset;
/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
to the function start address. */
int block_address_function_relative;
/* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
file. Used to detect the SunPRO solaris compiler. */
static int n_opt_found;
@ -1724,16 +1736,6 @@ process_one_symbol (type, desc, valu, name, section_offsets, objfile)
N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
static int function_stab_type = 0;
/* This is true for Solaris (and all other systems which put stabs
in sections, hopefully, since it would be silly to do things
differently from Solaris), and false for SunOS4 and other a.out
file formats. */
block_address_function_relative =
((0 == strncmp (bfd_get_target (objfile->obfd), "elf", 3))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "som", 3))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "coff", 4))
|| (0 == strncmp (bfd_get_target (objfile->obfd), "nlm", 3)));
if (!block_address_function_relative)
/* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
function start address, so just use the text offset. */
@ -2379,7 +2381,7 @@ stabsect_build_psymtabs (objfile, section_offsets, mainline, stab_name,
error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
stab_name, stabstr_name);
DBX_SYMFILE_INFO (objfile) = (PTR) xmalloc (sizeof (struct dbx_symfile_info));
objfile->sym_stab_info = (PTR) xmalloc (sizeof (struct dbx_symfile_info));
memset (DBX_SYMFILE_INFO (objfile), 0, sizeof (struct dbx_symfile_info));
DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
@ -2420,8 +2422,8 @@ stabsect_build_psymtabs (objfile, section_offsets, mainline, stab_name,
dbx_symfile_read (objfile, section_offsets, 0);
}
/* Scan and build partial symbols for a PA symbol file.
This PA file has already been processed to get its minimal symbols.
/* Scan and build partial symbols for a SOM symbol file.
This SOM file has already been processed to get its minimal symbols.
OBJFILE is the object file we are reading symbols from.
ADDR is the address relative to which the symbols are (e.g.
@ -2432,7 +2434,7 @@ stabsect_build_psymtabs (objfile, section_offsets, mainline, stab_name,
*/
void
pastab_build_psymtabs (objfile, section_offsets, mainline)
somstab_build_psymtabs (objfile, section_offsets, mainline)
struct objfile *objfile;
struct section_offsets *section_offsets;
int mainline;
@ -2443,8 +2445,8 @@ pastab_build_psymtabs (objfile, section_offsets, mainline)
/* This is needed to debug objects assembled with gas2. */
processing_acc_compilation = 1;
/* In a PA file, we've already installed the minimal symbols that came
from the PA (non-stab) symbol table, so always act like an
/* In a SOM file, we've already installed the minimal symbols that came
from the SOM (non-stab) symbol table, so always act like an
incremental load here. */
dbx_symfile_read (objfile, section_offsets, mainline);

4
gdb/mpw-make.in
View File

@ -347,7 +347,7 @@ ALLDEPFILES = "{s}"29k-share:udi:udip2soc.c "{s}"29k-share:udi:udr.c \Option-d
"{s}"nindy-share:Onindy.c "{s}"nindy-share:nindy.c \Option-d
"{s}"nindy-share:ttyflush.c "{s}"nindy-tdep.c \Option-d
"{s}"ns32k-pinsn.c "{s}"ns32km3-nat.c "{s}"osfsolib.c \Option-d
"{s}"paread.c "{s}"procfs.c "{s}"pyr-pinsn.c "{s}"pyr-tdep.c "{s}"pyr-xdep.c \Option-d
"{s}"somread.c "{s}"procfs.c "{s}"pyr-pinsn.c "{s}"pyr-tdep.c "{s}"pyr-xdep.c \Option-d
"{s}"remote-adapt.c "{s}"remote-bug.c "{s}"remote-e7000.c "{s}"remote-eb.c "{s}"remote-es.c \Option-d
"{s}"remote-hms.c "{s}"remote-mips.c \Option-d
"{s}"remote-mm.c "{s}"remote-mon.c "{s}"remote-nindy.c "{s}"remote-sim.c \Option-d
@ -1349,7 +1349,7 @@ MAKEOVERRIDES=
"{o}"osfsolib.c.o \Option-f "{s}"osfsolib.c {command_h} {defs_h} {gdbcore_h} {inferior_h} \Option-d
"{s}"objfiles.h "{s}"regex.h "{s}"symfile.h "{s}"target.h "{s}"language.h
"{o}"paread.c.o \Option-f "{s}"paread.c {bfd_h} "{s}"buildsym.h "{s}"complaints.h {defs_h} \Option-d
"{o}"somread.c.o \Option-f "{s}"somread.c {bfd_h} "{s}"buildsym.h "{s}"complaints.h {defs_h} \Option-d
"{s}"gdb-stabs.h "{s}"objfiles.h "{s}"symfile.h {symtab_h}
"{o}"parse.c.o \Option-f "{s}"parse.c {command_h} {defs_h} {expression_h} {frame_h} \Option-d

547
gdb/paread.c
View File

@ -1,547 +0,0 @@
/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "bfd.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"
#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 <string.h>
#include "demangle.h"
#include <sys/file.h>
/* Size of n_value and n_strx fields in a stab symbol. */
#define BYTES_IN_WORD 4
#include "aout/aout64.h"
/* Various things we might complain about... */
static void
pa_symfile_init PARAMS ((struct objfile *));
static void
pa_new_init PARAMS ((struct objfile *));
static void
pa_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
static void
pa_symfile_finish PARAMS ((struct objfile *));
static void
pa_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
static void
free_painfo PARAMS ((PTR));
static struct section_offsets *
pa_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
pa_symtab_read -- read the symbol table of a PA file
SYNOPSIS
void pa_symtab_read (bfd *abfd, CORE_ADDR addr,
struct objfile *objfile)
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
pa_symtab_read (abfd, addr, objfile)
bfd *abfd;
CORE_ADDR addr;
struct objfile *objfile;
{
unsigned int number_of_symbols;
unsigned int i;
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);
number_of_symbols = bfd_get_symcount (abfd);
buf = alloca (symsize * number_of_symbols);
bfd_seek (abfd, obj_som_sym_filepos (abfd), L_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), L_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;
#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;
#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;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
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;
#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 '$'. */
if ((symname[0] == 'L' && symname[1] == '$')
|| (symname[0] == '$' && symname[strlen(symname) - 1] == '$'))
continue;
break;
case ST_PRI_PROG:
case ST_SEC_PROG:
case ST_MILLICODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_text;
#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;
#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;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_data;
goto check_strange_names;
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);
}
install_minimal_symbols (objfile);
}
/* Scan and build partial symbols for a symbol file.
We have been initialized by a call to pa_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 the PA.
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!!!
pastab_build_psymtabs() handles STABS symbols.
Note that PA 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
pa_symfile_read (objfile, section_offsets, mainline)
struct objfile *objfile;
struct section_offsets *section_offsets;
int mainline;
{
bfd *abfd = objfile->obfd;
struct cleanup *back_to;
CORE_ADDR offset;
init_minimal_symbol_collection ();
back_to = make_cleanup (discard_minimal_symbols, 0);
make_cleanup (free_painfo, (PTR) objfile);
/* Process the normal PA symbol table first. */
/* FIXME, should take a section_offsets param, not just an offset. */
offset = ANOFFSET (section_offsets, 0);
pa_symtab_read (abfd, offset, objfile);
/* Now process debugging information, which is contained in
special PA sections. */
pastab_build_psymtabs (objfile, section_offsets, mainline);
do_cleanups (back_to);
}
/* This cleans up the objfile's sym_stab_info pointer, and the chain of
stab_section_info's, that might be dangling from it. */
static void
free_painfo (objp)
PTR objp;
{
struct objfile *objfile = (struct objfile *)objp;
struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
objfile->sym_stab_info;
struct stab_section_info *ssi, *nssi;
ssi = dbxinfo->stab_section_info;
while (ssi)
{
nssi = ssi->next;
mfree (objfile->md, ssi);
ssi = nssi;
}
dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
}
/* 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 PA file. */
static void
pa_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
pa_symfile_finish (objfile)
struct objfile *objfile;
{
if (objfile -> sym_stab_info != NULL)
{
mfree (objfile -> md, objfile -> sym_stab_info);
}
}
/* PA specific initialization routine for reading symbols.
It is passed a pointer to 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 can fill with goodies.
This routine is almost a complete ripoff of dbx_symfile_init. The
common parts of these routines should be extracted and used instead of
duplicating this code. FIXME. */
static void
pa_symfile_init (objfile)
struct objfile *objfile;
{
int val;
bfd *sym_bfd = objfile->obfd;
char *name = bfd_get_filename (sym_bfd);
asection *stabsect; /* Section containing symbol table entries */
asection *stringsect; /* Section containing symbol name strings */
stabsect = bfd_get_section_by_name (sym_bfd, "$GDB_SYMBOLS$");
stringsect = bfd_get_section_by_name (sym_bfd, "$GDB_STRINGS$");
/* Allocate struct to keep track of the symfile */
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));
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
#define STRING_TABLE_OFFSET (stringsect->filepos)
#define SYMBOL_TABLE_OFFSET (stabsect->filepos)
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, "$TEXT$");
if (!DBX_TEXT_SECT (objfile))
error ("Can't find $TEXT$ section in symbol file");
if (!stabsect)
return;
if (!stringsect)
error ("Found stabs, but not string section");
/* FIXME: I suspect this should be external_nlist. The size of host
types like long and bfd_vma should not affect how we read the
file. */
DBX_SYMBOL_SIZE (objfile) = sizeof (struct internal_nlist);
DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
/ DBX_SYMBOL_SIZE (objfile);
DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
/* Read the string table and stash it away in the psymbol_obstack. It is
only needed as long as we need to expand psymbols into full symbols,
so when we blow away the psymbol the string table goes away as well.
Note that gdb used to use the results of attempting to malloc the
string table, based on the size it read, as a form of sanity check
for botched byte swapping, on the theory that a byte swapped string
table size would be so totally bogus that the malloc would fail. Now
that we put in on the psymbol_obstack, we can't do this since gdb gets
a fatal error (out of virtual memory) if the size is bogus. We can
however at least check to see if the size is zero or some negative
value. */
DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stringsect);
if (DBX_SYMCOUNT (objfile) == 0
|| DBX_STRINGTAB_SIZE (objfile) == 0)
return;
if (DBX_STRINGTAB_SIZE (objfile) <= 0
|| DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
error ("ridiculous string table size (%d bytes).",
DBX_STRINGTAB_SIZE (objfile));
DBX_STRINGTAB (objfile) =
(char *) obstack_alloc (&objfile -> psymbol_obstack,
DBX_STRINGTAB_SIZE (objfile));
/* Now read in the string table in one big gulp. */
val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
if (val < 0)
perror_with_name (name);
val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
sym_bfd);
if (val == 0)
error ("End of file reading string table");
else if (val < 0)
/* It's possible bfd_read should be setting bfd_error, and we should be
checking that. But currently it doesn't set bfd_error. */
perror_with_name (name);
else if (val != DBX_STRINGTAB_SIZE (objfile))
error ("Short read reading string table");
}
/* PA specific parsing routine for section offsets.
Plain and simple for now. */
static struct section_offsets *
pa_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 that we are able to handle SOM object file formats. */
static struct sym_fns pa_sym_fns =
{
bfd_target_som_flavour,
pa_new_init, /* sym_new_init: init anything gbl to entire symtab */
pa_symfile_init, /* sym_init: read initial info, setup for sym_read() */
pa_symfile_read, /* sym_read: read a symbol file into symtab */
pa_symfile_finish, /* sym_finish: finished with file, cleanup */
pa_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
NULL /* next: pointer to next struct sym_fns */
};
void
_initialize_paread ()
{
add_symtab_fns (&pa_sym_fns);
}

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gdb/somread.c Normal file
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/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "bfd.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"
#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 <string.h>
#include "demangle.h"
#include <sys/file.h>
/* Size of n_value and n_strx fields in a stab symbol. */
#define BYTES_IN_WORD 4
#include "aout/aout64.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 *, CORE_ADDR, struct objfile *));
static void
free_sominfo PARAMS ((PTR));
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, CORE_ADDR addr,
struct objfile *objfile)
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, addr, objfile)
bfd *abfd;
CORE_ADDR addr;
struct objfile *objfile;
{
unsigned int number_of_symbols;
unsigned int i;
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);
number_of_symbols = bfd_get_symcount (abfd);
buf = alloca (symsize * number_of_symbols);
bfd_seek (abfd, obj_som_sym_filepos (abfd), L_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), L_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;
#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;
#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;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
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;
#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 '$'. */
if ((symname[0] == 'L' && symname[1] == '$')
|| (symname[0] == '$' && symname[strlen(symname) - 1] == '$'))
continue;
break;
case ST_PRI_PROG:
case ST_SEC_PROG:
case ST_MILLICODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_text;
#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;
#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;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_data;
goto check_strange_names;
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);
}
install_minimal_symbols (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;
CORE_ADDR offset;
init_minimal_symbol_collection ();
back_to = make_cleanup (discard_minimal_symbols, 0);
make_cleanup (free_sominfo, (PTR) objfile);
/* Process the normal SOM symbol table first. */
/* FIXME, should take a section_offsets param, not just an offset. */
offset = ANOFFSET (section_offsets, 0);
som_symtab_read (abfd, offset, objfile);
/* Now process debugging information, which is contained in
special SOM sections. */
somstab_build_psymtabs (objfile, section_offsets, mainline);
do_cleanups (back_to);
}
/* This cleans up the objfile's sym_stab_info pointer, and the chain of
stab_section_info's, that might be dangling from it. */
static void
free_sominfo (objp)
PTR objp;
{
struct objfile *objfile = (struct objfile *)objp;
struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
objfile->sym_stab_info;
struct stab_section_info *ssi, *nssi;
ssi = dbxinfo->stab_section_info;
while (ssi)
{
nssi = ssi->next;
mfree (objfile->md, ssi);
ssi = nssi;
}
dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
}
/* 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);
}
}
/* SOM specific initialization routine for reading symbols.
It is passed a pointer to 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 can fill with goodies.
This routine is almost a complete ripoff of dbx_symfile_init. The
common parts of these routines should be extracted and used instead of
duplicating this code. FIXME. */
static void
som_symfile_init (objfile)
struct objfile *objfile;
{
int val;
bfd *sym_bfd = objfile->obfd;
char *name = bfd_get_filename (sym_bfd);
asection *stabsect; /* Section containing symbol table entries */
asection *stringsect; /* Section containing symbol name strings */
stabsect = bfd_get_section_by_name (sym_bfd, "$GDB_SYMBOLS$");
stringsect = bfd_get_section_by_name (sym_bfd, "$GDB_STRINGS$");
/* Allocate struct to keep track of the symfile */
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));
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
#define STRING_TABLE_OFFSET (stringsect->filepos)
#define SYMBOL_TABLE_OFFSET (stabsect->filepos)
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, "$TEXT$");
if (!DBX_TEXT_SECT (objfile))
error ("Can't find $TEXT$ section in symbol file");
if (!stabsect)
return;
if (!stringsect)
error ("Found stabs, but not string section");
/* FIXME: I suspect this should be external_nlist. The size of host
types like long and bfd_vma should not affect how we read the
file. */
DBX_SYMBOL_SIZE (objfile) = sizeof (struct internal_nlist);
DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
/ DBX_SYMBOL_SIZE (objfile);
DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
/* Read the string table and stash it away in the psymbol_obstack. It is
only needed as long as we need to expand psymbols into full symbols,
so when we blow away the psymbol the string table goes away as well.
Note that gdb used to use the results of attempting to malloc the
string table, based on the size it read, as a form of sanity check
for botched byte swapping, on the theory that a byte swapped string
table size would be so totally bogus that the malloc would fail. Now
that we put in on the psymbol_obstack, we can't do this since gdb gets
a fatal error (out of virtual memory) if the size is bogus. We can
however at least check to see if the size is zero or some negative
value. */
DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stringsect);
if (DBX_SYMCOUNT (objfile) == 0
|| DBX_STRINGTAB_SIZE (objfile) == 0)
return;
if (DBX_STRINGTAB_SIZE (objfile) <= 0
|| DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
error ("ridiculous string table size (%d bytes).",
DBX_STRINGTAB_SIZE (objfile));
DBX_STRINGTAB (objfile) =
(char *) obstack_alloc (&objfile -> psymbol_obstack,
DBX_STRINGTAB_SIZE (objfile));
/* Now read in the string table in one big gulp. */
val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
if (val < 0)
perror_with_name (name);
val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
sym_bfd);
if (val == 0)
error ("End of file reading string table");
else if (val < 0)
/* It's possible bfd_read should be setting bfd_error, and we should be
checking that. But currently it doesn't set bfd_error. */
perror_with_name (name);
else if (val != DBX_STRINGTAB_SIZE (objfile))
error ("Short read reading string table");
}
/* 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));
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);
}