/* Read HP PA/Risc object files for GDB.
- Copyright (C) 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002,
- 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1991-2014 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
+ 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,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "bfd.h"
-#include <syms.h>
+#include "som/aout.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
-#include "gdb_string.h"
#include "demangle.h"
#include "som.h"
#include "libhppa.h"
+#include "psymtab.h"
#include "solib-som.h"
-/*
-
- 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
+/* Read the symbol table of a SOM file.
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.
- */
+ function and data symbols to the minimal symbol table. */
static void
som_symtab_read (bfd *abfd, struct objfile *objfile,
struct section_offsets *section_offsets)
{
+ struct cleanup *cleanup;
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
unsigned int number_of_symbols;
int val, dynamic;
char *stringtab;
asection *shlib_info;
- struct symbol_dictionary_record *buf, *bufp, *endbufp;
+ struct som_external_symbol_dictionary_record *buf, *bufp, *endbufp;
char *symname;
- CONST int symsize = sizeof (struct symbol_dictionary_record);
- CORE_ADDR text_offset, data_offset;
+ const int symsize = sizeof (struct som_external_symbol_dictionary_record);
- text_offset = ANOFFSET (section_offsets, 0);
- data_offset = ANOFFSET (section_offsets, 1);
-
number_of_symbols = bfd_get_symcount (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);
+ cleanup = 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)
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);
+ dynamic = (ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)) != 0);
endbufp = buf + number_of_symbols;
for (bufp = buf; bufp < endbufp; ++bufp)
{
enum minimal_symbol_type ms_type;
+ unsigned int flags = bfd_getb32 (bufp->flags);
+ unsigned int symbol_type
+ = (flags >> SOM_SYMBOL_TYPE_SH) & SOM_SYMBOL_TYPE_MASK;
+ unsigned int symbol_scope
+ = (flags >> SOM_SYMBOL_SCOPE_SH) & SOM_SYMBOL_SCOPE_MASK;
+ CORE_ADDR symbol_value = bfd_getb32 (bufp->symbol_value);
+ asection *section = NULL;
QUIT;
- switch (bufp->symbol_scope)
+ /* Compute the section. */
+ switch (symbol_scope)
+ {
+ case SS_EXTERNAL:
+ if (symbol_type != ST_STORAGE)
+ section = bfd_und_section_ptr;
+ else
+ section = bfd_com_section_ptr;
+ break;
+
+ case SS_UNSAT:
+ if (symbol_type != ST_STORAGE)
+ section = bfd_und_section_ptr;
+ else
+ section = bfd_com_section_ptr;
+ break;
+
+ case SS_UNIVERSAL:
+ section = bfd_section_from_som_symbol (abfd, bufp);
+ break;
+
+ case SS_LOCAL:
+ section = bfd_section_from_som_symbol (abfd, bufp);
+ break;
+ }
+
+ switch (symbol_scope)
{
case SS_UNIVERSAL:
case SS_EXTERNAL:
- switch (bufp->symbol_type)
+ switch (symbol_type)
{
case ST_SYM_EXT:
case ST_ARG_EXT:
case ST_PRI_PROG:
case ST_SEC_PROG:
case ST_MILLICODE:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_text;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_ENTRY:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
/* For a dynamic executable, ST_ENTRY symbols are
the stubs, while the ST_CODE symbol is the real
function. */
ms_type = mst_solib_trampoline;
else
ms_type = mst_text;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_STUB:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_solib_trampoline;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_DATA:
- symname = bufp->name.n_strx + stringtab;
- bufp->symbol_value += data_offset;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_data;
break;
default:
case SS_GLOBAL:
#endif
case SS_LOCAL:
- switch (bufp->symbol_type)
+ switch (symbol_type)
{
case ST_SYM_EXT:
case ST_ARG_EXT:
continue;
case ST_CODE:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_file_text;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
check_strange_names:
/* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local
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 '$'.
+ being '$'.
And finally, the newer HP compilers emit crud like $PIC_foo$N
in some circumstance (PIC code I guess). It's also claimed
case ST_PRI_PROG:
case ST_SEC_PROG:
case ST_MILLICODE:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_file_text;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_ENTRY:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
/* 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
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_STUB:
- symname = bufp->name.n_strx + stringtab;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_solib_trampoline;
- bufp->symbol_value += text_offset;
- bufp->symbol_value = gdbarch_smash_text_address
- (current_gdbarch, bufp->symbol_value);
+ symbol_value = gdbarch_addr_bits_remove (gdbarch, symbol_value);
break;
case ST_DATA:
- symname = bufp->name.n_strx + stringtab;
- bufp->symbol_value += data_offset;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_file_data;
goto check_strange_names;
This also happens for weak symbols, but their type is
ST_DATA. */
case SS_UNSAT:
- switch (bufp->symbol_type)
+ switch (symbol_type)
{
case ST_STORAGE:
case ST_DATA:
- symname = bufp->name.n_strx + stringtab;
- bufp->symbol_value += data_offset;
+ symname = bfd_getb32 (bufp->name) + stringtab;
ms_type = mst_data;
break;
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);
+ if (bfd_getb32 (bufp->name) > obj_som_stringtab_size (abfd))
+ error (_("Invalid symbol data; bad HP string table offset: %s"),
+ plongest (bfd_getb32 (bufp->name)));
+
+ if (bfd_is_const_section (section))
+ {
+ struct obj_section *iter;
+
+ ALL_OBJFILE_OSECTIONS (objfile, iter)
+ {
+ CORE_ADDR start;
+ CORE_ADDR len;
+
+ if (bfd_is_const_section (iter->the_bfd_section))
+ continue;
+
+ start = bfd_get_section_vma (iter->objfile->obfd,
+ iter->the_bfd_section);
+ len = bfd_get_section_size (iter->the_bfd_section);
+ if (start <= symbol_value && symbol_value < start + len)
+ {
+ section = iter->the_bfd_section;
+ break;
+ }
+ }
+ }
- prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type,
- objfile);
+ prim_record_minimal_symbol_and_info (symname, symbol_value, ms_type,
+ gdb_bfd_section_index (objfile->obfd,
+ section),
+ objfile);
}
+
+ do_cleanups (cleanup);
}
/* Scan and build partial symbols for a symbol file.
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
for real.
We look for sections with specific names, to tell us what debug
- format to look for: FIXME!!!
+ format to look for.
somstab_build_psymtabs() handles STABS symbols.
capability even for files compiled without -g. */
static void
-som_symfile_read (struct objfile *objfile, int mainline)
+som_symfile_read (struct objfile *objfile, int symfile_flags)
{
bfd *abfd = objfile->obfd;
struct cleanup *back_to;
init_minimal_symbol_collection ();
back_to = make_cleanup_discard_minimal_symbols ();
- /* Process the normal SOM symbol table first.
+ /* 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". */
+ actually scan the DNTT. It does scan the linker symbol
+ table and thus build up a "minimal symbol table". */
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. */
+ 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, mainline,
+ stabsect_build_psymtabs (objfile,
"$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
}
}
/* 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
+ 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. */
+ objfile struct from the global list of known objfiles. */
static void
som_symfile_finish (struct objfile *objfile)
{
- if (objfile->deprecated_sym_stab_info != NULL)
- {
- xfree (objfile->deprecated_sym_stab_info);
- }
}
/* SOM specific initialization routine for reading symbols. */
objfile->flags |= OBJF_REORDERED;
}
+/* An object of this type is passed to find_section_offset. */
+
+struct find_section_offset_arg
+{
+ /* The objfile. */
+
+ struct objfile *objfile;
+
+ /* Flags to invert. */
+
+ flagword invert;
+
+ /* Flags to look for. */
+
+ flagword flags;
+
+ /* A text section with non-zero size, if any. */
+
+ asection *best_section;
+
+ /* An empty text section, if any. */
+
+ asection *empty_section;
+};
+
+/* A callback for bfd_map_over_sections that tries to find a section
+ with particular flags in an objfile. */
+
+static void
+find_section_offset (bfd *abfd, asection *sect, void *arg)
+{
+ struct find_section_offset_arg *info = arg;
+ flagword aflag;
+
+ aflag = bfd_get_section_flags (abfd, sect);
+
+ aflag ^= info->invert;
+
+ if ((aflag & info->flags) == info->flags)
+ {
+ if (bfd_section_size (abfd, sect) > 0)
+ {
+ if (info->best_section == NULL)
+ info->best_section = sect;
+ }
+ else
+ {
+ if (info->empty_section == NULL)
+ info->empty_section = sect;
+ }
+ }
+}
+
+/* Set a section index from a BFD. */
+
+static void
+set_section_index (struct objfile *objfile, flagword invert, flagword flags,
+ int *index_ptr)
+{
+ struct find_section_offset_arg info;
+
+ info.objfile = objfile;
+ info.best_section = NULL;
+ info.empty_section = NULL;
+ info.invert = invert;
+ info.flags = flags;
+ bfd_map_over_sections (objfile->obfd, find_section_offset, &info);
+
+ if (info.best_section)
+ *index_ptr = info.best_section->index;
+ else if (info.empty_section)
+ *index_ptr = info.empty_section->index;
+}
+
/* SOM specific parsing routine for section offsets.
Plain and simple for now. */
static void
-som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs)
+som_symfile_offsets (struct objfile *objfile,
+ const struct section_addr_info *addrs)
{
int i;
CORE_ADDR text_addr;
+ asection *sect;
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;
+ set_section_index (objfile, 0, SEC_ALLOC | SEC_CODE,
+ &objfile->sect_index_text);
+ set_section_index (objfile, 0, SEC_ALLOC | SEC_DATA,
+ &objfile->sect_index_data);
+ set_section_index (objfile, SEC_LOAD, SEC_ALLOC | SEC_LOAD,
+ &objfile->sect_index_bss);
+ set_section_index (objfile, 0, SEC_ALLOC | SEC_READONLY,
+ &objfile->sect_index_rodata);
/* First see if we're a shared library. If so, get the section
offsets from the library, else get them from addrs. */
{
/* 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++)
+ name. */
+ for (i = 0; i < addrs->num_sections; i++)
if (strcmp (addrs->other[i].name, ".text") == 0)
break;
text_addr = addrs->other[i].addr;
/* Register that we are able to handle SOM object file formats. */
-static struct sym_fns som_sym_fns =
+static const 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 */
- default_symfile_segments, /* sym_segments: Get segment information from
- a file. */
- NULL /* next: pointer to next struct sym_fns */
+ som_new_init, /* init anything gbl to entire symtab */
+ som_symfile_init, /* read initial info, setup for sym_read() */
+ som_symfile_read, /* read a symbol file into symtab */
+ NULL, /* sym_read_psymbols */
+ som_symfile_finish, /* finished with file, cleanup */
+ som_symfile_offsets, /* Translate ext. to int. relocation */
+ default_symfile_segments, /* Get segment information from a file. */
+ NULL,
+ default_symfile_relocate, /* Relocate a debug section. */
+ NULL, /* sym_get_probes */
+ &psym_functions
};
+initialize_file_ftype _initialize_somread;
+
void
_initialize_somread (void)
{
- add_symtab_fns (&som_sym_fns);
+ add_symtab_fns (bfd_target_som_flavour, &som_sym_fns);
}
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