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9b3128c4d9
if AUTO_SOLIB_LIMIT is not greater than zero.
* somsolib.c (som_solib_create_inferior_hook): No longer warn
about missing __d_pid symbol.
1617 lines
49 KiB
C
1617 lines
49 KiB
C
/* Handle HP SOM shared libraries for GDB, the GNU Debugger.
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Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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Written by the Center for Software Science at the Univerity of Utah
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and by Cygnus Support. */
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#include "defs.h"
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#include "frame.h"
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#include "bfd.h"
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#include "som.h"
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#include "libhppa.h"
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#include "gdbcore.h"
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#include "symtab.h"
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#include "breakpoint.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "inferior.h"
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#include "gdb-stabs.h"
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#include "gdb_stat.h"
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#include "gdbcmd.h"
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#include "assert.h"
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#include "language.h"
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#include "regcache.h"
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#include <fcntl.h>
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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/* Uncomment this to turn on some debugging output.
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*/
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/* #define SOLIB_DEBUG
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*/
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/* Defined in exec.c; used to prevent dangling pointer bug.
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*/
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extern struct target_ops exec_ops;
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/* This lives in hppa-tdep.c. */
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extern struct unwind_table_entry *find_unwind_entry (CORE_ADDR pc);
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/* These ought to be defined in some public interface, but aren't. They
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define the meaning of the various bits in the distinguished __dld_flags
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variable that is declared in every debuggable a.out on HP-UX, and that
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is shared between the debugger and the dynamic linker.
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*/
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#define DLD_FLAGS_MAPPRIVATE 0x1
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#define DLD_FLAGS_HOOKVALID 0x2
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#define DLD_FLAGS_LISTVALID 0x4
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#define DLD_FLAGS_BOR_ENABLE 0x8
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/* TODO:
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* Most of this code should work for hp300 shared libraries. Does
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anyone care enough to weed out any SOM-isms.
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* Support for hpux8 dynamic linker. */
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/* The basic structure which describes a dynamically loaded object. This
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data structure is private to the dynamic linker and isn't found in
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any HPUX include file. */
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struct som_solib_mapped_entry
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{
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/* The name of the library. */
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char *name;
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/* Version of this structure (it is expected to change again in hpux10). */
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unsigned char struct_version;
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/* Binding mode for this library. */
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unsigned char bind_mode;
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/* Version of this library. */
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short library_version;
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/* Start of text address,
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* link-time text location (length of text area),
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* end of text address. */
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CORE_ADDR text_addr;
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CORE_ADDR text_link_addr;
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CORE_ADDR text_end;
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/* Start of data, start of bss and end of data. */
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CORE_ADDR data_start;
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CORE_ADDR bss_start;
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CORE_ADDR data_end;
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/* Value of linkage pointer (%r19). */
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CORE_ADDR got_value;
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/* Next entry. */
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struct som_solib_mapped_entry *next;
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/* There are other fields, but I don't have information as to what is
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contained in them. */
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/* For versions from HPUX-10.30 and up */
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/* Address in target of offset from thread-local register of
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* start of this thread's data. I.e., the first thread-local
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* variable in this shared library starts at *(tsd_start_addr)
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* from that area pointed to by cr27 (mpsfu_hi).
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*
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* We do the indirection as soon as we read it, so from then
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* on it's the offset itself.
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*/
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CORE_ADDR tsd_start_addr;
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/* Following this are longwords holding:
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* ?, ?, ?, ptr to -1, ptr to-1, ptr to lib name (leaf name),
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* ptr to __data_start, ptr to __data_end
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*/
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};
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/* A structure to keep track of all the known shared objects. */
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struct so_list
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{
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struct som_solib_mapped_entry som_solib;
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struct objfile *objfile;
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bfd *abfd;
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struct section_table *sections;
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struct section_table *sections_end;
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/* elz: added this field to store the address in target space (in the
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library) of the library descriptor (handle) which we read into
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som_solib_mapped_entry structure */
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CORE_ADDR solib_addr;
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struct so_list *next;
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};
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static struct so_list *so_list_head;
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/* This is the cumulative size in bytes of the symbol tables of all
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shared objects on the so_list_head list. (When we say size, here
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we mean of the information before it is brought into memory and
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potentially expanded by GDB.) When adding a new shlib, this value
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is compared against the threshold size, held by auto_solib_limit
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(in megabytes). If adding symbols for the new shlib would cause
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the total size to exceed the threshold, then the new shlib's
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symbols are not loaded. */
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static LONGEST som_solib_total_st_size;
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/* When the threshold is reached for any shlib, we refuse to add
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symbols for subsequent shlibs, even if those shlibs' symbols would
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be small enough to fit under the threshold. (Although this may
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result in one, early large shlib preventing the loading of later,
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smalller shlibs' symbols, it allows us to issue one informational
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message. The alternative, to issue a message for each shlib whose
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symbols aren't loaded, could be a big annoyance where the threshold
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is exceeded due to a very large number of shlibs.)
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*/
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static int som_solib_st_size_threshold_exceeded;
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/* These addresses should be filled in by som_solib_create_inferior_hook.
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They are also used elsewhere in this module.
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*/
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typedef struct
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{
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CORE_ADDR address;
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struct unwind_table_entry *unwind;
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}
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addr_and_unwind_t;
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/* When adding fields, be sure to clear them in _initialize_som_solib. */
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static struct
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{
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boolean is_valid;
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addr_and_unwind_t hook;
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addr_and_unwind_t hook_stub;
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addr_and_unwind_t load;
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addr_and_unwind_t load_stub;
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addr_and_unwind_t unload;
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addr_and_unwind_t unload2;
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addr_and_unwind_t unload_stub;
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}
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dld_cache;
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static void som_sharedlibrary_info_command (char *, int);
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static void som_solib_sharedlibrary_command (char *, int);
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static LONGEST
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som_solib_sizeof_symbol_table (char *filename)
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{
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bfd *abfd;
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int desc;
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char *absolute_name;
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LONGEST st_size = (LONGEST) 0;
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asection *sect;
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/* We believe that filename was handed to us by the dynamic linker, and
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is therefore always an absolute path.
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*/
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desc = openp (getenv ("PATH"), 1, filename, O_RDONLY | O_BINARY, 0, &absolute_name);
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if (desc < 0)
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{
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perror_with_name (filename);
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}
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filename = absolute_name;
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abfd = bfd_fdopenr (filename, gnutarget, desc);
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if (!abfd)
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{
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close (desc);
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make_cleanup (xfree, filename);
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error ("\"%s\": can't open to read symbols: %s.", filename,
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bfd_errmsg (bfd_get_error ()));
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}
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if (!bfd_check_format (abfd, bfd_object)) /* Reads in section info */
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{
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bfd_close (abfd); /* This also closes desc */
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make_cleanup (xfree, filename);
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error ("\"%s\": can't read symbols: %s.", filename,
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bfd_errmsg (bfd_get_error ()));
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}
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/* Sum the sizes of the various sections that compose debug info. */
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/* This contains non-DOC information. */
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sect = bfd_get_section_by_name (abfd, "$DEBUG$");
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if (sect)
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st_size += (LONGEST) bfd_section_size (abfd, sect);
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/* This contains DOC information. */
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sect = bfd_get_section_by_name (abfd, "$PINFO$");
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if (sect)
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st_size += (LONGEST) bfd_section_size (abfd, sect);
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bfd_close (abfd); /* This also closes desc */
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xfree (filename);
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/* Unfortunately, just summing the sizes of various debug info
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sections isn't a very accurate measurement of how much heap
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space the debugger will need to hold them. It also doesn't
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account for space needed by linker (aka "minimal") symbols.
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Anecdotal evidence suggests that just summing the sizes of
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debug-info-related sections understates the heap space needed
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to represent it internally by about an order of magnitude.
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Since it's not exactly brain surgery we're doing here, rather
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than attempt to more accurately measure the size of a shlib's
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symbol table in GDB's heap, we'll just apply a 10x fudge-
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factor to the debug info sections' size-sum. No, this doesn't
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account for minimal symbols in non-debuggable shlibs. But it
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all roughly washes out in the end.
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*/
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return st_size * (LONGEST) 10;
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}
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static void
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som_solib_add_solib_objfile (struct so_list *so, char *name, int from_tty,
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CORE_ADDR text_addr)
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{
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obj_private_data_t *obj_private;
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struct obj_section *s;
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so->objfile = symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED);
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so->abfd = so->objfile->obfd;
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/* syms_from_objfile has bizarre section offset code,
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so I do my own right here. */
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for (s = so->objfile->sections; s < so->objfile->sections_end; s++)
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{
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flagword aflag = bfd_get_section_flags(so->abfd, s->the_bfd_section);
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if (aflag & SEC_CODE)
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{
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s->addr += so->som_solib.text_addr - so->som_solib.text_link_addr;
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s->endaddr += so->som_solib.text_addr - so->som_solib.text_link_addr;
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}
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else if (aflag & SEC_DATA)
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{
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s->addr += so->som_solib.data_start;
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s->endaddr += so->som_solib.data_start;
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}
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else
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;
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}
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/* Mark this as a shared library and save private data.
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*/
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so->objfile->flags |= OBJF_SHARED;
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if (so->objfile->obj_private == NULL)
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{
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obj_private = (obj_private_data_t *)
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obstack_alloc (&so->objfile->psymbol_obstack,
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sizeof (obj_private_data_t));
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obj_private->unwind_info = NULL;
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obj_private->so_info = NULL;
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so->objfile->obj_private = (PTR) obj_private;
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}
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obj_private = (obj_private_data_t *) so->objfile->obj_private;
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obj_private->so_info = so;
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if (!bfd_check_format (so->abfd, bfd_object))
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{
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error ("\"%s\": not in executable format: %s.",
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name, bfd_errmsg (bfd_get_error ()));
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}
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}
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static void
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som_solib_load_symbols (struct so_list *so, char *name, int from_tty,
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CORE_ADDR text_addr, struct target_ops *target)
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{
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struct section_table *p;
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int status;
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char buf[4];
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CORE_ADDR presumed_data_start;
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#ifdef SOLIB_DEBUG
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printf ("--Adding symbols for shared library \"%s\"\n", name);
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#endif
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som_solib_add_solib_objfile (so, name, from_tty, text_addr);
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/* Now we need to build a section table for this library since
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we might be debugging a core file from a dynamically linked
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executable in which the libraries were not privately mapped. */
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if (build_section_table (so->abfd,
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&so->sections,
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&so->sections_end))
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{
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error ("Unable to build section table for shared library\n.");
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return;
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}
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/* Relocate all the sections based on where they got loaded. */
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for (p = so->sections; p < so->sections_end; p++)
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{
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if (p->the_bfd_section->flags & SEC_CODE)
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{
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p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile));
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p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile));
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}
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else if (p->the_bfd_section->flags & SEC_DATA)
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{
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p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile));
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p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile));
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}
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}
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/* Now see if we need to map in the text and data for this shared
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library (for example debugging a core file which does not use
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private shared libraries.).
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Carefully peek at the first text address in the library. If the
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read succeeds, then the libraries were privately mapped and were
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included in the core dump file.
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If the peek failed, then the libraries were not privately mapped
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and are not in the core file, we'll have to read them in ourselves. */
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status = target_read_memory (text_addr, buf, 4);
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if (status != 0)
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{
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int old, new;
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new = so->sections_end - so->sections;
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old = target_resize_to_sections (target, new);
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/* Copy over the old data before it gets clobbered. */
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memcpy ((char *) (target->to_sections + old),
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so->sections,
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((sizeof (struct section_table)) * new));
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}
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}
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/* Add symbols from shared libraries into the symtab list, unless the
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size threshold specified by auto_solib_limit (in megabytes) would
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be exceeded. */
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void
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som_solib_add (char *arg_string, int from_tty, struct target_ops *target, int readsyms)
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{
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struct minimal_symbol *msymbol;
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struct so_list *so_list_tail;
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CORE_ADDR addr;
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asection *shlib_info;
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int status;
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unsigned int dld_flags;
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char buf[4], *re_err;
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int threshold_warning_given = 0;
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/* First validate our arguments. */
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if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
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{
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error ("Invalid regexp: %s", re_err);
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}
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/* If we're debugging a core file, or have attached to a running
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process, then som_solib_create_inferior_hook will not have been
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called.
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We need to first determine if we're dealing with a dynamically
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linked executable. If not, then return without an error or warning.
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We also need to examine __dld_flags to determine if the shared library
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list is valid and to determine if the libraries have been privately
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mapped. */
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if (symfile_objfile == NULL)
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return;
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/* First see if the objfile was dynamically linked. */
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shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$");
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if (!shlib_info)
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return;
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/* It's got a $SHLIB_INFO$ section, make sure it's not empty. */
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if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
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return;
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msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL);
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if (msymbol == NULL)
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{
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error ("Unable to find __dld_flags symbol in object file.\n");
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return;
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}
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addr = SYMBOL_VALUE_ADDRESS (msymbol);
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/* Read the current contents. */
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status = target_read_memory (addr, buf, 4);
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if (status != 0)
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{
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error ("Unable to read __dld_flags\n");
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return;
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}
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dld_flags = extract_unsigned_integer (buf, 4);
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/* __dld_list may not be valid. If not, then we punt, warning the user if
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we were called as a result of the add-symfile command.
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|
*/
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if ((dld_flags & DLD_FLAGS_LISTVALID) == 0)
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{
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if (from_tty)
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error ("__dld_list is not valid according to __dld_flags.\n");
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return;
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}
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/* If the libraries were not mapped private, warn the user. */
|
|
if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0)
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warning ("The shared libraries were not privately mapped; setting a\nbreakpoint in a shared library will not work until you rerun the program.\n");
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msymbol = lookup_minimal_symbol ("__dld_list", NULL, NULL);
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if (!msymbol)
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{
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/* Older crt0.o files (hpux8) don't have __dld_list as a symbol,
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but the data is still available if you know where to look. */
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msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL);
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if (!msymbol)
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{
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error ("Unable to find dynamic library list.\n");
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return;
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}
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addr = SYMBOL_VALUE_ADDRESS (msymbol) - 8;
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}
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else
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addr = SYMBOL_VALUE_ADDRESS (msymbol);
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status = target_read_memory (addr, buf, 4);
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if (status != 0)
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{
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error ("Unable to find dynamic library list.\n");
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return;
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}
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addr = extract_unsigned_integer (buf, 4);
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/* If addr is zero, then we're using an old dynamic loader which
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doesn't maintain __dld_list. We'll have to use a completely
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different approach to get shared library information. */
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|
if (addr == 0)
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goto old_dld;
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|
|
/* Using the information in __dld_list is the preferred method
|
|
to get at shared library information. It doesn't depend on
|
|
any functions in /opt/langtools/lib/end.o and has a chance of working
|
|
with hpux10 when it is released. */
|
|
status = target_read_memory (addr, buf, 4);
|
|
if (status != 0)
|
|
{
|
|
error ("Unable to find dynamic library list.\n");
|
|
return;
|
|
}
|
|
|
|
/* addr now holds the address of the first entry in the dynamic
|
|
library list. */
|
|
addr = extract_unsigned_integer (buf, 4);
|
|
|
|
/* Now that we have a pointer to the dynamic library list, walk
|
|
through it and add the symbols for each library. */
|
|
|
|
so_list_tail = so_list_head;
|
|
/* Find the end of the list of shared objects. */
|
|
while (so_list_tail && so_list_tail->next)
|
|
so_list_tail = so_list_tail->next;
|
|
|
|
#ifdef SOLIB_DEBUG
|
|
printf ("--About to read shared library list data\n");
|
|
#endif
|
|
|
|
/* "addr" will always point to the base of the
|
|
* current data entry describing the current
|
|
* shared library.
|
|
*/
|
|
while (1)
|
|
{
|
|
CORE_ADDR name_addr, text_addr;
|
|
unsigned int name_len;
|
|
char *name;
|
|
struct so_list *new_so;
|
|
struct so_list *so_list = so_list_head;
|
|
struct stat statbuf;
|
|
LONGEST st_size;
|
|
int is_main_program;
|
|
|
|
if (addr == 0)
|
|
break;
|
|
|
|
/* Get a pointer to the name of this library. */
|
|
status = target_read_memory (addr, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
name_addr = extract_unsigned_integer (buf, 4);
|
|
name_len = 0;
|
|
while (1)
|
|
{
|
|
target_read_memory (name_addr + name_len, buf, 1);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
name_len++;
|
|
if (*buf == '\0')
|
|
break;
|
|
}
|
|
name = alloca (name_len);
|
|
status = target_read_memory (name_addr, name, name_len);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
/* See if we've already loaded something with this name. */
|
|
while (so_list)
|
|
{
|
|
if (!strcmp (so_list->som_solib.name, name))
|
|
break;
|
|
so_list = so_list->next;
|
|
}
|
|
|
|
/* See if the file exists. If not, give a warning, but don't
|
|
die. */
|
|
status = stat (name, &statbuf);
|
|
if (status == -1)
|
|
{
|
|
warning ("Can't find file %s referenced in dld_list.", name);
|
|
|
|
status = target_read_memory (addr + 36, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
addr = (CORE_ADDR) extract_unsigned_integer (buf, 4);
|
|
continue;
|
|
}
|
|
|
|
/* If we've already loaded this one or it's the main program, skip it. */
|
|
is_main_program = (strcmp (name, symfile_objfile->name) == 0);
|
|
if (so_list || is_main_program)
|
|
{
|
|
/* This is the "next" pointer in the strcuture.
|
|
*/
|
|
status = target_read_memory (addr + 36, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
addr = (CORE_ADDR) extract_unsigned_integer (buf, 4);
|
|
|
|
/* Record the main program's symbol table size. */
|
|
if (is_main_program && !so_list)
|
|
{
|
|
st_size = som_solib_sizeof_symbol_table (name);
|
|
som_solib_total_st_size += st_size;
|
|
}
|
|
|
|
/* Was this a shlib that we noted but didn't load the symbols for?
|
|
If so, were we invoked this time from the command-line, via
|
|
a 'sharedlibrary' or 'add-symbol-file' command? If yes to
|
|
both, we'd better load the symbols this time.
|
|
*/
|
|
if (from_tty && so_list && !is_main_program && (so_list->objfile == NULL))
|
|
som_solib_load_symbols (so_list,
|
|
name,
|
|
from_tty,
|
|
so_list->som_solib.text_addr,
|
|
target);
|
|
|
|
continue;
|
|
}
|
|
|
|
name = obsavestring (name, name_len - 1,
|
|
&symfile_objfile->symbol_obstack);
|
|
|
|
status = target_read_memory (addr + 8, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
text_addr = extract_unsigned_integer (buf, 4);
|
|
|
|
new_so = (struct so_list *) xmalloc (sizeof (struct so_list));
|
|
memset ((char *) new_so, 0, sizeof (struct so_list));
|
|
if (so_list_head == NULL)
|
|
{
|
|
so_list_head = new_so;
|
|
so_list_tail = new_so;
|
|
}
|
|
else
|
|
{
|
|
so_list_tail->next = new_so;
|
|
so_list_tail = new_so;
|
|
}
|
|
|
|
/* Fill in all the entries in GDB's shared library list.
|
|
*/
|
|
|
|
new_so->solib_addr = addr;
|
|
new_so->som_solib.name = name;
|
|
status = target_read_memory (addr + 4, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.struct_version = extract_unsigned_integer (buf + 3, 1);
|
|
new_so->som_solib.bind_mode = extract_unsigned_integer (buf + 2, 1);
|
|
/* Following is "high water mark", highest version number
|
|
* seen, rather than plain version number.
|
|
*/
|
|
new_so->som_solib.library_version = extract_unsigned_integer (buf, 2);
|
|
new_so->som_solib.text_addr = text_addr;
|
|
|
|
/* Q: What about longword at "addr + 8"?
|
|
* A: It's read above, out of order, into "text_addr".
|
|
*/
|
|
|
|
status = target_read_memory (addr + 12, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.text_link_addr = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 16, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.text_end = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 20, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.data_start = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 24, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.bss_start = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 28, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.data_end = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 32, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.got_value = extract_unsigned_integer (buf, 4);
|
|
|
|
status = target_read_memory (addr + 36, buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
new_so->som_solib.next =
|
|
address_to_host_pointer (extract_unsigned_integer (buf, 4));
|
|
|
|
/* Note that we don't re-set "addr" to the next pointer
|
|
* until after we've read the trailing data.
|
|
*/
|
|
|
|
status = target_read_memory (addr + 40, buf, 4);
|
|
new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
|
|
/* Now indirect via that value!
|
|
*/
|
|
status = target_read_memory (new_so->som_solib.tsd_start_addr, buf, 4);
|
|
new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4);
|
|
if (status != 0)
|
|
goto err;
|
|
#ifdef SOLIB_DEBUG
|
|
printf ("\n+ library \"%s\" is described at 0x%x\n", name, addr);
|
|
printf (" 'version' is %d\n", new_so->som_solib.struct_version);
|
|
printf (" 'bind_mode' is %d\n", new_so->som_solib.bind_mode);
|
|
printf (" 'library_version' is %d\n", new_so->som_solib.library_version);
|
|
printf (" 'text_addr' is 0x%x\n", new_so->som_solib.text_addr);
|
|
printf (" 'text_link_addr' is 0x%x\n", new_so->som_solib.text_link_addr);
|
|
printf (" 'text_end' is 0x%x\n", new_so->som_solib.text_end);
|
|
printf (" 'data_start' is 0x%x\n", new_so->som_solib.data_start);
|
|
printf (" 'bss_start' is 0x%x\n", new_so->som_solib.bss_start);
|
|
printf (" 'data_end' is 0x%x\n", new_so->som_solib.data_end);
|
|
printf (" 'got_value' is %x\n", new_so->som_solib.got_value);
|
|
printf (" 'next' is 0x%x\n", new_so->som_solib.next);
|
|
printf (" 'tsd_start_addr' is 0x%x\n", new_so->som_solib.tsd_start_addr);
|
|
#endif
|
|
|
|
/* Go on to the next shared library descriptor.
|
|
*/
|
|
addr = (CORE_ADDR) new_so->som_solib.next;
|
|
|
|
|
|
|
|
/* At this point, we have essentially hooked the shlib into the
|
|
"info share" command. However, we haven't yet loaded its
|
|
symbol table. We must now decide whether we ought to, i.e.,
|
|
whether doing so would exceed the symbol table size threshold.
|
|
|
|
If the threshold has just now been exceeded, then we'll issue
|
|
a warning message (which explains how to load symbols manually,
|
|
if the user so desires).
|
|
|
|
If the threshold has just now or previously been exceeded,
|
|
we'll just add the shlib to the list of object files, but won't
|
|
actually load its symbols. (This is more useful than it might
|
|
sound, for it allows us to e.g., still load and use the shlibs'
|
|
unwind information for stack tracebacks.)
|
|
*/
|
|
|
|
/* Note that we DON'T want to preclude the user from using the
|
|
add-symbol-file command! Thus, we only worry about the threshold
|
|
when we're invoked for other reasons.
|
|
*/
|
|
st_size = som_solib_sizeof_symbol_table (name);
|
|
som_solib_st_size_threshold_exceeded =
|
|
!from_tty &&
|
|
auto_solib_limit > 0 &&
|
|
readsyms &&
|
|
((st_size + som_solib_total_st_size) > (auto_solib_limit * (LONGEST) (1024 * 1024)));
|
|
|
|
if (som_solib_st_size_threshold_exceeded)
|
|
{
|
|
if (!threshold_warning_given)
|
|
warning ("Symbols for some libraries have not been loaded, because\ndoing so would exceed the size threshold specified by auto-solib-limit.\nTo manually load symbols, use the 'sharedlibrary' command.\nTo raise the threshold, set auto-solib-limit to a larger value and rerun\nthe program.\n");
|
|
threshold_warning_given = 1;
|
|
|
|
/* We'll still make note of this shlib, even if we don't
|
|
read its symbols. This allows us to use its unwind
|
|
information well enough to know how to e.g., correctly
|
|
do a traceback from a PC within the shlib, even if we
|
|
can't symbolize those PCs...
|
|
*/
|
|
som_solib_add_solib_objfile (new_so, name, from_tty, text_addr);
|
|
continue;
|
|
}
|
|
|
|
som_solib_total_st_size += st_size;
|
|
|
|
/* This fills in new_so->objfile, among others. */
|
|
som_solib_load_symbols (new_so, name, from_tty, text_addr, target);
|
|
}
|
|
|
|
#ifdef SOLIB_DEBUG
|
|
printf ("--Done reading shared library data\n");
|
|
#endif
|
|
|
|
/* Getting new symbols may change our opinion about what is
|
|
frameless. */
|
|
reinit_frame_cache ();
|
|
return;
|
|
|
|
old_dld:
|
|
error ("Debugging dynamic executables loaded via the hpux8 dld.sl is not supported.\n");
|
|
return;
|
|
|
|
err:
|
|
error ("Error while reading dynamic library list.\n");
|
|
return;
|
|
}
|
|
|
|
|
|
/* This hook gets called just before the first instruction in the
|
|
inferior process is executed.
|
|
|
|
This is our opportunity to set magic flags in the inferior so
|
|
that GDB can be notified when a shared library is mapped in and
|
|
to tell the dynamic linker that a private copy of the library is
|
|
needed (so GDB can set breakpoints in the library).
|
|
|
|
__dld_flags is the location of the magic flags; as of this implementation
|
|
there are 3 flags of interest:
|
|
|
|
bit 0 when set indicates that private copies of the libraries are needed
|
|
bit 1 when set indicates that the callback hook routine is valid
|
|
bit 2 when set indicates that the dynamic linker should maintain the
|
|
__dld_list structure when loading/unloading libraries.
|
|
|
|
Note that shared libraries are not mapped in at this time, so we have
|
|
run the inferior until the libraries are mapped in. Typically this
|
|
means running until the "_start" is called. */
|
|
|
|
void
|
|
som_solib_create_inferior_hook (void)
|
|
{
|
|
struct minimal_symbol *msymbol;
|
|
unsigned int dld_flags, status, have_endo;
|
|
asection *shlib_info;
|
|
char buf[4];
|
|
struct objfile *objfile;
|
|
CORE_ADDR anaddr;
|
|
|
|
/* First, remove all the solib event breakpoints. Their addresses
|
|
may have changed since the last time we ran the program. */
|
|
remove_solib_event_breakpoints ();
|
|
|
|
if (symfile_objfile == NULL)
|
|
return;
|
|
|
|
/* First see if the objfile was dynamically linked. */
|
|
shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$");
|
|
if (!shlib_info)
|
|
return;
|
|
|
|
/* It's got a $SHLIB_INFO$ section, make sure it's not empty. */
|
|
if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
|
|
return;
|
|
|
|
have_endo = 0;
|
|
/* Slam the pid of the process into __d_pid.
|
|
|
|
We used to warn when this failed, but that warning is only useful
|
|
on very old HP systems (hpux9 and older). The warnings are an
|
|
annoyance to users of modern systems and foul up the testsuite as
|
|
well. As a result, the warnings have been disabled. */
|
|
msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
goto keep_going;
|
|
|
|
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
store_unsigned_integer (buf, 4, PIDGET (inferior_ptid));
|
|
status = target_write_memory (anaddr, buf, 4);
|
|
if (status != 0)
|
|
{
|
|
warning ("Unable to write __d_pid");
|
|
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
|
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
|
goto keep_going;
|
|
}
|
|
|
|
/* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook;
|
|
This will force the dynamic linker to call __d_trap when significant
|
|
events occur.
|
|
|
|
Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above,
|
|
the dld provides an export stub named "__d_trap" as well as the
|
|
function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
|
|
We'll look first for the old flavor and then the new.
|
|
*/
|
|
msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
{
|
|
warning ("Unable to find _DLD_HOOK symbol in object file.");
|
|
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
|
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
|
goto keep_going;
|
|
}
|
|
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
dld_cache.hook.address = anaddr;
|
|
|
|
/* Grrr, this might not be an export symbol! We have to find the
|
|
export stub. */
|
|
ALL_OBJFILES (objfile)
|
|
{
|
|
struct unwind_table_entry *u;
|
|
struct minimal_symbol *msymbol2;
|
|
|
|
/* What a crock. */
|
|
msymbol2 = lookup_minimal_symbol_solib_trampoline (SYMBOL_NAME (msymbol),
|
|
NULL, objfile);
|
|
/* Found a symbol with the right name. */
|
|
if (msymbol2)
|
|
{
|
|
struct unwind_table_entry *u;
|
|
/* It must be a shared library trampoline. */
|
|
if (SYMBOL_TYPE (msymbol2) != mst_solib_trampoline)
|
|
continue;
|
|
|
|
/* It must also be an export stub. */
|
|
u = find_unwind_entry (SYMBOL_VALUE (msymbol2));
|
|
if (!u || u->stub_unwind.stub_type != EXPORT)
|
|
continue;
|
|
|
|
/* OK. Looks like the correct import stub. */
|
|
anaddr = SYMBOL_VALUE (msymbol2);
|
|
dld_cache.hook_stub.address = anaddr;
|
|
}
|
|
}
|
|
store_unsigned_integer (buf, 4, anaddr);
|
|
|
|
msymbol = lookup_minimal_symbol ("__dld_hook", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
{
|
|
warning ("Unable to find __dld_hook symbol in object file.");
|
|
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
|
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
|
goto keep_going;
|
|
}
|
|
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
status = target_write_memory (anaddr, buf, 4);
|
|
|
|
/* Now set a shlib_event breakpoint at __d_trap so we can track
|
|
significant shared library events. */
|
|
msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
{
|
|
warning ("Unable to find __dld_d_trap symbol in object file.");
|
|
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
|
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
|
goto keep_going;
|
|
}
|
|
create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol));
|
|
|
|
/* We have all the support usually found in end.o, so we can track
|
|
shl_load and shl_unload calls. */
|
|
have_endo = 1;
|
|
|
|
keep_going:
|
|
|
|
/* Get the address of __dld_flags, if no such symbol exists, then we can
|
|
not debug the shared code. */
|
|
msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL);
|
|
if (msymbol == NULL)
|
|
{
|
|
error ("Unable to find __dld_flags symbol in object file.\n");
|
|
}
|
|
|
|
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
|
|
/* Read the current contents. */
|
|
status = target_read_memory (anaddr, buf, 4);
|
|
if (status != 0)
|
|
{
|
|
error ("Unable to read __dld_flags\n");
|
|
}
|
|
dld_flags = extract_unsigned_integer (buf, 4);
|
|
|
|
/* Turn on the flags we care about. */
|
|
dld_flags |= DLD_FLAGS_MAPPRIVATE;
|
|
if (have_endo)
|
|
dld_flags |= DLD_FLAGS_HOOKVALID;
|
|
store_unsigned_integer (buf, 4, dld_flags);
|
|
status = target_write_memory (anaddr, buf, 4);
|
|
if (status != 0)
|
|
{
|
|
error ("Unable to write __dld_flags\n");
|
|
}
|
|
|
|
/* Now find the address of _start and set a breakpoint there.
|
|
We still need this code for two reasons:
|
|
|
|
* Not all sites have /opt/langtools/lib/end.o, so it's not always
|
|
possible to track the dynamic linker's events.
|
|
|
|
* At this time no events are triggered for shared libraries
|
|
loaded at startup time (what a crock). */
|
|
|
|
msymbol = lookup_minimal_symbol ("_start", NULL, symfile_objfile);
|
|
if (msymbol == NULL)
|
|
{
|
|
error ("Unable to find _start symbol in object file.\n");
|
|
}
|
|
|
|
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
|
|
/* Make the breakpoint at "_start" a shared library event breakpoint. */
|
|
create_solib_event_breakpoint (anaddr);
|
|
|
|
/* Wipe out all knowledge of old shared libraries since their
|
|
mapping can change from one exec to another! */
|
|
while (so_list_head)
|
|
{
|
|
struct so_list *temp;
|
|
|
|
temp = so_list_head;
|
|
xfree (so_list_head);
|
|
so_list_head = temp->next;
|
|
}
|
|
clear_symtab_users ();
|
|
}
|
|
|
|
/* This operation removes the "hook" between GDB and the dynamic linker,
|
|
which causes the dld to notify GDB of shared library events.
|
|
|
|
After this operation completes, the dld will no longer notify GDB of
|
|
shared library events. To resume notifications, GDB must call
|
|
som_solib_create_inferior_hook.
|
|
|
|
This operation does not remove any knowledge of shared libraries which
|
|
GDB may already have been notified of.
|
|
*/
|
|
void
|
|
som_solib_remove_inferior_hook (int pid)
|
|
{
|
|
CORE_ADDR addr;
|
|
struct minimal_symbol *msymbol;
|
|
int status;
|
|
char dld_flags_buffer[TARGET_INT_BIT / TARGET_CHAR_BIT];
|
|
unsigned int dld_flags_value;
|
|
struct cleanup *old_cleanups = save_inferior_ptid ();
|
|
|
|
/* Ensure that we're really operating on the specified process. */
|
|
inferior_ptid = pid_to_ptid (pid);
|
|
|
|
/* We won't bother to remove the solib breakpoints from this process.
|
|
|
|
In fact, on PA64 the breakpoint is hard-coded into the dld callback,
|
|
and thus we're not supposed to remove it.
|
|
|
|
Rather, we'll merely clear the dld_flags bit that enables callbacks.
|
|
*/
|
|
msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL);
|
|
|
|
addr = SYMBOL_VALUE_ADDRESS (msymbol);
|
|
status = target_read_memory (addr, dld_flags_buffer, TARGET_INT_BIT / TARGET_CHAR_BIT);
|
|
|
|
dld_flags_value = extract_unsigned_integer (dld_flags_buffer,
|
|
sizeof (dld_flags_value));
|
|
|
|
dld_flags_value &= ~DLD_FLAGS_HOOKVALID;
|
|
store_unsigned_integer (dld_flags_buffer,
|
|
sizeof (dld_flags_value),
|
|
dld_flags_value);
|
|
status = target_write_memory (addr, dld_flags_buffer, TARGET_INT_BIT / TARGET_CHAR_BIT);
|
|
|
|
do_cleanups (old_cleanups);
|
|
}
|
|
|
|
|
|
/* This function creates a breakpoint on the dynamic linker hook, which
|
|
is called when e.g., a shl_load or shl_unload call is made. This
|
|
breakpoint will only trigger when a shl_load call is made.
|
|
|
|
If filename is NULL, then loads of any dll will be caught. Else,
|
|
only loads of the file whose pathname is the string contained by
|
|
filename will be caught.
|
|
|
|
Undefined behaviour is guaranteed if this function is called before
|
|
som_solib_create_inferior_hook.
|
|
*/
|
|
void
|
|
som_solib_create_catch_load_hook (int pid, int tempflag, char *filename,
|
|
char *cond_string)
|
|
{
|
|
create_solib_load_event_breakpoint ("__d_trap", tempflag, filename, cond_string);
|
|
}
|
|
|
|
/* This function creates a breakpoint on the dynamic linker hook, which
|
|
is called when e.g., a shl_load or shl_unload call is made. This
|
|
breakpoint will only trigger when a shl_unload call is made.
|
|
|
|
If filename is NULL, then unloads of any dll will be caught. Else,
|
|
only unloads of the file whose pathname is the string contained by
|
|
filename will be caught.
|
|
|
|
Undefined behaviour is guaranteed if this function is called before
|
|
som_solib_create_inferior_hook.
|
|
*/
|
|
void
|
|
som_solib_create_catch_unload_hook (int pid, int tempflag, char *filename,
|
|
char *cond_string)
|
|
{
|
|
create_solib_unload_event_breakpoint ("__d_trap", tempflag, filename, cond_string);
|
|
}
|
|
|
|
int
|
|
som_solib_have_load_event (int pid)
|
|
{
|
|
CORE_ADDR event_kind;
|
|
|
|
event_kind = read_register (ARG0_REGNUM);
|
|
return (event_kind == SHL_LOAD);
|
|
}
|
|
|
|
int
|
|
som_solib_have_unload_event (int pid)
|
|
{
|
|
CORE_ADDR event_kind;
|
|
|
|
event_kind = read_register (ARG0_REGNUM);
|
|
return (event_kind == SHL_UNLOAD);
|
|
}
|
|
|
|
static char *
|
|
som_solib_library_pathname (int pid)
|
|
{
|
|
CORE_ADDR dll_handle_address;
|
|
CORE_ADDR dll_pathname_address;
|
|
struct som_solib_mapped_entry dll_descriptor;
|
|
char *p;
|
|
static char dll_pathname[1024];
|
|
|
|
/* Read the descriptor of this newly-loaded library. */
|
|
dll_handle_address = read_register (ARG1_REGNUM);
|
|
read_memory (dll_handle_address, (char *) &dll_descriptor, sizeof (dll_descriptor));
|
|
|
|
/* We can find a pointer to the dll's pathname within the descriptor. */
|
|
dll_pathname_address = (CORE_ADDR) dll_descriptor.name;
|
|
|
|
/* Read the pathname, one byte at a time. */
|
|
p = dll_pathname;
|
|
for (;;)
|
|
{
|
|
char b;
|
|
read_memory (dll_pathname_address++, (char *) &b, 1);
|
|
*p++ = b;
|
|
if (b == '\0')
|
|
break;
|
|
}
|
|
|
|
return dll_pathname;
|
|
}
|
|
|
|
char *
|
|
som_solib_loaded_library_pathname (int pid)
|
|
{
|
|
if (!som_solib_have_load_event (pid))
|
|
error ("Must have a load event to use this query");
|
|
|
|
return som_solib_library_pathname (pid);
|
|
}
|
|
|
|
char *
|
|
som_solib_unloaded_library_pathname (int pid)
|
|
{
|
|
if (!som_solib_have_unload_event (pid))
|
|
error ("Must have an unload event to use this query");
|
|
|
|
return som_solib_library_pathname (pid);
|
|
}
|
|
|
|
static void
|
|
som_solib_desire_dynamic_linker_symbols (void)
|
|
{
|
|
struct objfile *objfile;
|
|
struct unwind_table_entry *u;
|
|
struct minimal_symbol *dld_msymbol;
|
|
|
|
/* Do we already know the value of these symbols? If so, then
|
|
we've no work to do.
|
|
|
|
(If you add clauses to this test, be sure to likewise update the
|
|
test within the loop.)
|
|
*/
|
|
if (dld_cache.is_valid)
|
|
return;
|
|
|
|
ALL_OBJFILES (objfile)
|
|
{
|
|
dld_msymbol = lookup_minimal_symbol ("shl_load", NULL, objfile);
|
|
if (dld_msymbol != NULL)
|
|
{
|
|
dld_cache.load.address = SYMBOL_VALUE (dld_msymbol);
|
|
dld_cache.load.unwind = find_unwind_entry (dld_cache.load.address);
|
|
}
|
|
|
|
dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_load",
|
|
NULL,
|
|
objfile);
|
|
if (dld_msymbol != NULL)
|
|
{
|
|
if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
|
|
{
|
|
u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol));
|
|
if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT))
|
|
{
|
|
dld_cache.load_stub.address = SYMBOL_VALUE (dld_msymbol);
|
|
dld_cache.load_stub.unwind = u;
|
|
}
|
|
}
|
|
}
|
|
|
|
dld_msymbol = lookup_minimal_symbol ("shl_unload", NULL, objfile);
|
|
if (dld_msymbol != NULL)
|
|
{
|
|
dld_cache.unload.address = SYMBOL_VALUE (dld_msymbol);
|
|
dld_cache.unload.unwind = find_unwind_entry (dld_cache.unload.address);
|
|
|
|
/* ??rehrauer: I'm not sure exactly what this is, but it appears
|
|
that on some HPUX 10.x versions, there's two unwind regions to
|
|
cover the body of "shl_unload", the second being 4 bytes past
|
|
the end of the first. This is a large hack to handle that
|
|
case, but since I don't seem to have any legitimate way to
|
|
look for this thing via the symbol table...
|
|
*/
|
|
if (dld_cache.unload.unwind != NULL)
|
|
{
|
|
u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4);
|
|
if (u != NULL)
|
|
{
|
|
dld_cache.unload2.address = u->region_start;
|
|
dld_cache.unload2.unwind = u;
|
|
}
|
|
}
|
|
}
|
|
|
|
dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_unload",
|
|
NULL,
|
|
objfile);
|
|
if (dld_msymbol != NULL)
|
|
{
|
|
if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline)
|
|
{
|
|
u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol));
|
|
if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT))
|
|
{
|
|
dld_cache.unload_stub.address = SYMBOL_VALUE (dld_msymbol);
|
|
dld_cache.unload_stub.unwind = u;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Did we find everything we were looking for? If so, stop. */
|
|
if ((dld_cache.load.address != 0)
|
|
&& (dld_cache.load_stub.address != 0)
|
|
&& (dld_cache.unload.address != 0)
|
|
&& (dld_cache.unload_stub.address != 0))
|
|
{
|
|
dld_cache.is_valid = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
dld_cache.hook.unwind = find_unwind_entry (dld_cache.hook.address);
|
|
dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address);
|
|
|
|
/* We're prepared not to find some of these symbols, which is why
|
|
this function is a "desire" operation, and not a "require".
|
|
*/
|
|
}
|
|
|
|
int
|
|
som_solib_in_dynamic_linker (int pid, CORE_ADDR pc)
|
|
{
|
|
struct unwind_table_entry *u_pc;
|
|
|
|
/* Are we in the dld itself?
|
|
|
|
??rehrauer: Large hack -- We'll assume that any address in a
|
|
shared text region is the dld's text. This would obviously
|
|
fall down if the user attached to a process, whose shlibs
|
|
weren't mapped to a (writeable) private region. However, in
|
|
that case the debugger probably isn't able to set the fundamental
|
|
breakpoint in the dld callback anyways, so this hack should be
|
|
safe.
|
|
*/
|
|
if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000)
|
|
return 1;
|
|
|
|
/* Cache the address of some symbols that are part of the dynamic
|
|
linker, if not already known.
|
|
*/
|
|
som_solib_desire_dynamic_linker_symbols ();
|
|
|
|
/* Are we in the dld callback? Or its export stub? */
|
|
u_pc = find_unwind_entry (pc);
|
|
if (u_pc == NULL)
|
|
return 0;
|
|
|
|
if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind))
|
|
return 1;
|
|
|
|
/* Or the interface of the dld (i.e., "shl_load" or friends)? */
|
|
if ((u_pc == dld_cache.load.unwind)
|
|
|| (u_pc == dld_cache.unload.unwind)
|
|
|| (u_pc == dld_cache.unload2.unwind)
|
|
|| (u_pc == dld_cache.load_stub.unwind)
|
|
|| (u_pc == dld_cache.unload_stub.unwind))
|
|
return 1;
|
|
|
|
/* Apparently this address isn't part of the dld's text. */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Return the GOT value for the shared library in which ADDR belongs. If
|
|
ADDR isn't in any known shared library, return zero. */
|
|
|
|
CORE_ADDR
|
|
som_solib_get_got_by_pc (CORE_ADDR addr)
|
|
{
|
|
struct so_list *so_list = so_list_head;
|
|
CORE_ADDR got_value = 0;
|
|
|
|
while (so_list)
|
|
{
|
|
if (so_list->som_solib.text_addr <= addr
|
|
&& so_list->som_solib.text_end > addr)
|
|
{
|
|
got_value = so_list->som_solib.got_value;
|
|
break;
|
|
}
|
|
so_list = so_list->next;
|
|
}
|
|
return got_value;
|
|
}
|
|
|
|
/* elz:
|
|
Return the address of the handle of the shared library
|
|
in which ADDR belongs. If
|
|
ADDR isn't in any known shared library, return zero. */
|
|
/* this function is used in hppa_fix_call_dummy in hppa-tdep.c */
|
|
|
|
CORE_ADDR
|
|
som_solib_get_solib_by_pc (CORE_ADDR addr)
|
|
{
|
|
struct so_list *so_list = so_list_head;
|
|
|
|
while (so_list)
|
|
{
|
|
if (so_list->som_solib.text_addr <= addr
|
|
&& so_list->som_solib.text_end > addr)
|
|
{
|
|
break;
|
|
}
|
|
so_list = so_list->next;
|
|
}
|
|
if (so_list)
|
|
return so_list->solib_addr;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
som_solib_section_offsets (struct objfile *objfile,
|
|
struct section_offsets *offsets)
|
|
{
|
|
struct so_list *so_list = so_list_head;
|
|
|
|
while (so_list)
|
|
{
|
|
/* Oh what a pain! We need the offsets before so_list->objfile
|
|
is valid. The BFDs will never match. Make a best guess. */
|
|
if (strstr (objfile->name, so_list->som_solib.name))
|
|
{
|
|
asection *private_section;
|
|
|
|
/* The text offset is easy. */
|
|
offsets->offsets[SECT_OFF_TEXT (objfile)]
|
|
= (so_list->som_solib.text_addr
|
|
- so_list->som_solib.text_link_addr);
|
|
offsets->offsets[SECT_OFF_RODATA (objfile)]
|
|
= ANOFFSET (offsets, SECT_OFF_TEXT (objfile));
|
|
|
|
/* We should look at presumed_dp in the SOM header, but
|
|
that's not easily available. This should be OK though. */
|
|
private_section = bfd_get_section_by_name (objfile->obfd,
|
|
"$PRIVATE$");
|
|
if (!private_section)
|
|
{
|
|
warning ("Unable to find $PRIVATE$ in shared library!");
|
|
offsets->offsets[SECT_OFF_DATA (objfile)] = 0;
|
|
offsets->offsets[SECT_OFF_BSS (objfile)] = 0;
|
|
return 1;
|
|
}
|
|
offsets->offsets[SECT_OFF_DATA (objfile)]
|
|
= (so_list->som_solib.data_start - private_section->vma);
|
|
offsets->offsets[SECT_OFF_BSS (objfile)]
|
|
= ANOFFSET (offsets, SECT_OFF_DATA (objfile));
|
|
return 1;
|
|
}
|
|
so_list = so_list->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Dump information about all the currently loaded shared libraries. */
|
|
|
|
static void
|
|
som_sharedlibrary_info_command (char *ignore, int from_tty)
|
|
{
|
|
struct so_list *so_list = so_list_head;
|
|
|
|
if (exec_bfd == NULL)
|
|
{
|
|
printf_unfiltered ("No executable file.\n");
|
|
return;
|
|
}
|
|
|
|
if (so_list == NULL)
|
|
{
|
|
printf_unfiltered ("No shared libraries loaded at this time.\n");
|
|
return;
|
|
}
|
|
|
|
printf_unfiltered ("Shared Object Libraries\n");
|
|
printf_unfiltered (" %-12s%-12s%-12s%-12s%-12s%-12s\n",
|
|
" flags", " tstart", " tend", " dstart", " dend", " dlt");
|
|
while (so_list)
|
|
{
|
|
unsigned int flags;
|
|
|
|
flags = so_list->som_solib.struct_version << 24;
|
|
flags |= so_list->som_solib.bind_mode << 16;
|
|
flags |= so_list->som_solib.library_version;
|
|
printf_unfiltered ("%s", so_list->som_solib.name);
|
|
if (so_list->objfile == NULL)
|
|
printf_unfiltered (" (symbols not loaded)");
|
|
printf_unfiltered ("\n");
|
|
printf_unfiltered (" %-12s", local_hex_string_custom (flags, "08l"));
|
|
printf_unfiltered ("%-12s",
|
|
local_hex_string_custom (so_list->som_solib.text_addr, "08l"));
|
|
printf_unfiltered ("%-12s",
|
|
local_hex_string_custom (so_list->som_solib.text_end, "08l"));
|
|
printf_unfiltered ("%-12s",
|
|
local_hex_string_custom (so_list->som_solib.data_start, "08l"));
|
|
printf_unfiltered ("%-12s",
|
|
local_hex_string_custom (so_list->som_solib.data_end, "08l"));
|
|
printf_unfiltered ("%-12s\n",
|
|
local_hex_string_custom (so_list->som_solib.got_value, "08l"));
|
|
so_list = so_list->next;
|
|
}
|
|
}
|
|
|
|
static void
|
|
som_solib_sharedlibrary_command (char *args, int from_tty)
|
|
{
|
|
dont_repeat ();
|
|
som_solib_add (args, from_tty, (struct target_ops *) 0, 1);
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
som_solib_address (CORE_ADDR addr)
|
|
{
|
|
struct so_list *so = so_list_head;
|
|
|
|
while (so)
|
|
{
|
|
/* Is this address within this shlib's text range? If so,
|
|
return the shlib's name.
|
|
*/
|
|
if ((addr >= so->som_solib.text_addr) && (addr <= so->som_solib.text_end))
|
|
return so->som_solib.name;
|
|
|
|
/* Nope, keep looking... */
|
|
so = so->next;
|
|
}
|
|
|
|
/* No, we couldn't prove that the address is within a shlib. */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void
|
|
som_solib_restart (void)
|
|
{
|
|
struct so_list *sl = so_list_head;
|
|
|
|
/* Before the shlib info vanishes, use it to disable any breakpoints
|
|
that may still be active in those shlibs.
|
|
*/
|
|
disable_breakpoints_in_shlibs (0);
|
|
|
|
/* Discard all the shlib descriptors.
|
|
*/
|
|
while (sl)
|
|
{
|
|
struct so_list *next_sl = sl->next;
|
|
xfree (sl);
|
|
sl = next_sl;
|
|
}
|
|
so_list_head = NULL;
|
|
|
|
som_solib_total_st_size = (LONGEST) 0;
|
|
som_solib_st_size_threshold_exceeded = 0;
|
|
|
|
dld_cache.is_valid = 0;
|
|
|
|
dld_cache.hook.address = 0;
|
|
dld_cache.hook.unwind = NULL;
|
|
|
|
dld_cache.hook_stub.address = 0;
|
|
dld_cache.hook_stub.unwind = NULL;
|
|
|
|
dld_cache.load.address = 0;
|
|
dld_cache.load.unwind = NULL;
|
|
|
|
dld_cache.load_stub.address = 0;
|
|
dld_cache.load_stub.unwind = NULL;
|
|
|
|
dld_cache.unload.address = 0;
|
|
dld_cache.unload.unwind = NULL;
|
|
|
|
dld_cache.unload2.address = 0;
|
|
dld_cache.unload2.unwind = NULL;
|
|
|
|
dld_cache.unload_stub.address = 0;
|
|
dld_cache.unload_stub.unwind = NULL;
|
|
}
|
|
|
|
|
|
/* LOCAL FUNCTION
|
|
|
|
no_shared_libraries -- handle command to explicitly discard symbols
|
|
from shared libraries.
|
|
|
|
DESCRIPTION
|
|
|
|
Implements the command "nosharedlibrary", which discards symbols
|
|
that have been auto-loaded from shared libraries. Symbols from
|
|
shared libraries that were added by explicit request of the user
|
|
are not discarded. Also called from remote.c. */
|
|
|
|
void
|
|
no_shared_libraries (char *ignored, int from_tty)
|
|
{
|
|
/* FIXME */
|
|
}
|
|
|
|
|
|
void
|
|
_initialize_som_solib (void)
|
|
{
|
|
add_com ("sharedlibrary", class_files, som_solib_sharedlibrary_command,
|
|
"Load shared object library symbols for files matching REGEXP.");
|
|
add_info ("sharedlibrary", som_sharedlibrary_info_command,
|
|
"Status of loaded shared object libraries.");
|
|
|
|
add_show_from_set
|
|
(add_set_cmd ("auto-solib-add", class_support, var_boolean,
|
|
(char *) &auto_solib_add,
|
|
"Set autoloading of shared library symbols.\n\
|
|
If \"on\", symbols from all shared object libraries will be loaded\n\
|
|
automatically when the inferior begins execution, when the dynamic linker\n\
|
|
informs gdb that a new library has been loaded, or when attaching to the\n\
|
|
inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.",
|
|
&setlist),
|
|
&showlist);
|
|
|
|
add_show_from_set
|
|
(add_set_cmd ("auto-solib-limit", class_support, var_zinteger,
|
|
(char *) &auto_solib_limit,
|
|
"Set threshold (in Mb) for autoloading shared library symbols.\n\
|
|
When shared library autoloading is enabled, new libraries will be loaded\n\
|
|
only until the total size of shared library symbols exceeds this\n\
|
|
threshold in megabytes. Is ignored when using `sharedlibrary'.",
|
|
&setlist),
|
|
&showlist);
|
|
|
|
/* ??rehrauer: On HP-UX, the kernel parameter MAXDSIZ limits how
|
|
much data space a process can use. We ought to be reading
|
|
MAXDSIZ and setting auto_solib_limit to some large fraction of
|
|
that value. If not that, we maybe ought to be setting it smaller
|
|
than the default for MAXDSIZ (that being 64Mb, I believe).
|
|
However, [1] this threshold is only crudely approximated rather
|
|
than actually measured, and [2] 50 Mbytes is too small for
|
|
debugging gdb itself. Thus, the arbitrary 100 figure. */
|
|
auto_solib_limit = 100; /* Megabytes */
|
|
|
|
som_solib_restart ();
|
|
}
|
|
|
|
/* Get some HPUX-specific data from a shared lib.
|
|
*/
|
|
CORE_ADDR
|
|
so_lib_thread_start_addr (struct so_list *so)
|
|
{
|
|
return so->som_solib.tsd_start_addr;
|
|
}
|