/* Read HP PA/Risc object files for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002,
+ 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
-This file is part of GDB.
+ 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 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 3 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.
+ 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. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "bfd.h"
-#include "som.h"
-#include "libhppa.h"
#include <syms.h>
#include "symtab.h"
#include "symfile.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
-#include <string.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 *, CORE_ADDR, struct objfile *));
-
-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 *));
+#include "som.h"
+#include "libhppa.h"
-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);
-}
+#include "solib-som.h"
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- som_symtab_read -- read the symbol table of a SOM file
+ som_symtab_read -- read the symbol table of a SOM file
-SYNOPSIS
+ SYNOPSIS
- void som_symtab_read (bfd *abfd, CORE_ADDR addr,
- struct objfile *objfile)
+ void som_symtab_read (bfd *abfd, struct objfile *objfile,
+ struct section_offsets *section_offsets)
-DESCRIPTION
+ 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.
-*/
+ 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;
+som_symtab_read (bfd *abfd, struct objfile *objfile,
+ struct section_offsets *section_offsets)
{
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
unsigned int number_of_symbols;
int val, dynamic;
char *stringtab;
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), L_SET);
- val = bfd_read (buf, symsize * number_of_symbols, 1, abfd);
+ /* Allocate a buffer to read in the debug info.
+ We avoid using alloca because the memory size could be so large
+ that we could hit the stack size limit. */
+ buf = xmalloc (symsize * number_of_symbols);
+ make_cleanup (xfree, buf);
+ bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET);
+ val = bfd_bread (buf, symsize * number_of_symbols, 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);
+ error (_("Couldn't read symbol dictionary!"));
+
+ /* Allocate a buffer to read in the som stringtab section of
+ the debugging info. Again, we avoid using alloca because
+ the data could be so large that we could potentially hit
+ the stack size limitat. */
+ stringtab = xmalloc (obj_som_stringtab_size (abfd));
+ make_cleanup (xfree, stringtab);
+ bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET);
+ val = bfd_bread (stringtab, obj_som_stringtab_size (abfd), abfd);
if (val != obj_som_stringtab_size (abfd))
- error ("Can't read in HP string table.");
+ 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;
+ this.
+
+ This code used to rely upon the existence of a $SHLIB_INFO$
+ section to make this determination. HP claims that it is
+ more accurate to check for a nonzero text offset, but they
+ have not provided any information about why that test is
+ more accurate. */
+ dynamic = (text_offset != 0);
endbufp = buf + number_of_symbols;
for (bufp = buf; bufp < endbufp; ++bufp)
case ST_MILLICODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_text;
-#ifdef SMASH_TEXT_ADDRESS
- SMASH_TEXT_ADDRESS (bufp->symbol_value);
-#endif
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
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. */
+ 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
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
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
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
+ bufp->symbol_value += data_offset;
ms_type = mst_data;
break;
default:
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
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
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 '$'. */
+ label prefixes for stabs, constant data, etc. So we need
+ only filter out L$ 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] == '$'))
+ || (symname[0] == '$' && symname[strlen (symname) - 1] == '$')
+ || (symname[0] == 'D' && symname[1] == '$')
+ || (strncmp (symname, "L0\001", 3) == 0)
+ || (strncmp (symname, "$PIC", 4) == 0))
continue;
break;
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
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
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
+ /* SS_LOCAL symbols in a shared library do not have
+ export stubs, so we do not have to worry about
+ using mst_file_text vs mst_solib_trampoline here like
+ we do for SS_UNIVERSAL and SS_EXTERNAL symbols above. */
+ ms_type = mst_file_text;
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
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
+ bufp->symbol_value += text_offset;
+ bufp->symbol_value = gdbarch_smash_text_address
+ (gdbarch, bufp->symbol_value);
break;
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
+ bufp->symbol_value += data_offset;
ms_type = mst_file_data;
goto check_strange_names;
}
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.
+
+ This also happens for weak symbols, but their type is
+ ST_DATA. */
+ case SS_UNSAT:
+ switch (bufp->symbol_type)
+ {
+ case ST_STORAGE:
+ case ST_DATA:
+ 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",
+ error (_("Invalid symbol data; bad HP string table offset: %d"),
bufp->name.n_strx);
- record_minimal_symbol (symname,
- bufp->symbol_value, ms_type,
- objfile);
+ prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type,
+ objfile);
}
}
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
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;
+som_symfile_read (struct objfile *objfile, int symfile_flags)
{
bfd *abfd = objfile->obfd;
struct cleanup *back_to;
- CORE_ADDR offset;
init_minimal_symbol_collection ();
- back_to = make_cleanup (discard_minimal_symbols, 0);
+ back_to = make_cleanup_discard_minimal_symbols ();
- /* FIXME, should take a section_offsets param, not just an offset. */
+ /* Process the normal SOM symbol table first.
+ This reads in the DNTT and string table, but doesn't
+ actually scan the DNTT. It does scan the linker symbol
+ table and thus build up a "minimal symbol table". */
- offset = ANOFFSET (section_offsets, 0);
-
- /* Process the normal SOM symbol table first. */
-
- som_symtab_read (abfd, offset, objfile);
-
- /* Now read information from the stabs debug sections. */
- stabsect_build_psymtabs (objfile, section_offsets, mainline,
- "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
-
-/* start-sanitize-hpread */
- /* Now read the native debug information. */
- hpread_build_psymtabs (objfile, section_offsets, mainline);
-/* end-sanitize-hpread */
+ som_symtab_read (abfd, objfile, objfile->section_offsets);
/* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
+ minimal symbols for this objfile.
+ Further symbol-reading is done incrementally, file-by-file,
+ in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c
+ contains the code to do the actual DNTT scanning and symtab building. */
install_minimal_symbols (objfile);
-
do_cleanups (back_to);
+
+ /* Now read information from the stabs debug sections.
+ This is emitted by gcc. */
+ stabsect_build_psymtabs (objfile,
+ "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
}
/* Initialize anything that needs initializing when a completely new symbol
We reinitialize buildsym, since we may be reading stabs from a SOM file. */
static void
-som_new_init (ignore)
- struct objfile *ignore;
+som_new_init (struct objfile *ignore)
{
stabsread_new_init ();
buildsym_new_init ();
objfile struct from the global list of known objfiles. */
static void
-som_symfile_finish (objfile)
- struct objfile *objfile;
+som_symfile_finish (struct objfile *objfile)
{
- if (objfile -> sym_stab_info != NULL)
+ if (objfile->deprecated_sym_stab_info != NULL)
{
- mfree (objfile -> md, objfile -> sym_stab_info);
+ xfree (objfile->deprecated_sym_stab_info);
}
-/* start-sanitize-hpread */
- hpread_symfile_finish (objfile);
-/* end-sanitize-hpread */
}
-/* SOM specific initialization routine for reading symbols.
+/* SOM specific initialization routine for reading symbols. */
- Nothing SOM specific left to do anymore. */
static void
-som_symfile_init (objfile)
- struct objfile *objfile;
+som_symfile_init (struct objfile *objfile)
{
-/* start-sanitize-hpread */
- hpread_symfile_init (objfile);
-/* end-sanitize-hpread */
+ /* SOM objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
}
/* 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;
+static void
+som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs)
{
- struct section_offsets *section_offsets;
int i;
+ CORE_ADDR text_addr;
+
+ objfile->num_sections = bfd_count_sections (objfile->obfd);
+ objfile->section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile->objfile_obstack,
+ SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
+
+ /* FIXME: ezannoni 2000-04-20 The section names in SOM are not
+ .text, .data, etc, but $TEXT$, $DATA$,... We should initialize
+ SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't
+ know the correspondence between SOM sections and GDB's idea of
+ section names. So for now we default to what is was before these
+ changes.*/
+ objfile->sect_index_text = 0;
+ objfile->sect_index_data = 1;
+ objfile->sect_index_bss = 2;
+ objfile->sect_index_rodata = 3;
+
+ /* First see if we're a shared library. If so, get the section
+ offsets from the library, else get them from addrs. */
+ if (!som_solib_section_offsets (objfile, objfile->section_offsets))
+ {
+ /* Note: Here is OK to compare with ".text" because this is the
+ name that gdb itself gives to that section, not the SOM
+ name. */
+ for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
+ if (strcmp (addrs->other[i].name, ".text") == 0)
+ break;
+ text_addr = addrs->other[i].addr;
- 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;
+ for (i = 0; i < objfile->num_sections; i++)
+ (objfile->section_offsets)->offsets[i] = text_addr;
+ }
}
\f
+
+
/* 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 */
+ 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 */
+ default_symfile_segments, /* sym_segments: Get segment information from
+ a file. */
+ NULL, /* sym_read_linetable */
+ default_symfile_relocate, /* sym_relocate: Relocate a debug section. */
+ NULL /* next: pointer to next struct sym_fns */
};
void
-_initialize_somread ()
+_initialize_somread (void)
{
add_symtab_fns (&som_sym_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff