/* Handle PA64 shared libraries for GDB, the GNU Debugger.
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/* Handle PA64 shared libraries for GDB, the GNU Debugger.
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Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Copyright (C) 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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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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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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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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HP in their infinite stupidity choose not to use standard ELF dynamic
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HP in their infinite stupidity choose not to use standard ELF dynamic
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linker interfaces. They also choose not to make their ELF dymamic
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linker interfaces. They also choose not to make their ELF dymamic
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linker interfaces compatible with the SOM dynamic linker. The
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linker interfaces compatible with the SOM dynamic linker. The
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net result is we can not use either of the existing somsolib.c or
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net result is we can not use either of the existing somsolib.c or
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solib.c. What a crock.
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solib.c. What a crock.
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Even more disgusting. This file depends on functions provided only
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Even more disgusting. This file depends on functions provided only
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in certain PA64 libraries. Thus this file is supposed to only be
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in certain PA64 libraries. Thus this file is supposed to only be
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used native. When will HP ever learn that they need to provide the
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used native. When will HP ever learn that they need to provide the
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same functionality in all their libraries! */
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same functionality in all their libraries! */
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#include "defs.h"
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#include "defs.h"
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#include "symtab.h"
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#include "symtab.h"
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#include "bfd.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "objfiles.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "target.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "hppa-tdep.h"
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#include "hppa-tdep.h"
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#include "solist.h"
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#include "solist.h"
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#include "solib.h"
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#include "solib.h"
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#include "solib-pa64.h"
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#include "solib-pa64.h"
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#undef SOLIB_PA64_DBG
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#undef SOLIB_PA64_DBG
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/* We can build this file only when running natively on 64-bit HP/UX.
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/* We can build this file only when running natively on 64-bit HP/UX.
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We check for that by checking for the elf_hp.h header file. */
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We check for that by checking for the elf_hp.h header file. */
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#if defined(HAVE_ELF_HP_H) && defined(__LP64__)
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#if defined(HAVE_ELF_HP_H) && defined(__LP64__)
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/* FIXME: kettenis/20041213: These includes should be eliminated. */
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/* FIXME: kettenis/20041213: These includes should be eliminated. */
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#include <dlfcn.h>
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#include <dlfcn.h>
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#include <elf.h>
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#include <elf.h>
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#include <elf_hp.h>
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#include <elf_hp.h>
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struct lm_info {
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struct lm_info {
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struct load_module_desc desc;
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struct load_module_desc desc;
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CORE_ADDR desc_addr;
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CORE_ADDR desc_addr;
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};
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};
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/* When adding fields, be sure to clear them in _initialize_pa64_solib. */
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/* When adding fields, be sure to clear them in _initialize_pa64_solib. */
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typedef struct
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typedef struct
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{
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{
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CORE_ADDR dld_flags_addr;
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CORE_ADDR dld_flags_addr;
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LONGEST dld_flags;
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LONGEST dld_flags;
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struct bfd_section *dyninfo_sect;
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struct bfd_section *dyninfo_sect;
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int have_read_dld_descriptor;
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int have_read_dld_descriptor;
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int is_valid;
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int is_valid;
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CORE_ADDR load_map;
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CORE_ADDR load_map;
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CORE_ADDR load_map_addr;
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CORE_ADDR load_map_addr;
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struct load_module_desc dld_desc;
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struct load_module_desc dld_desc;
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}
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}
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dld_cache_t;
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dld_cache_t;
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static dld_cache_t dld_cache;
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static dld_cache_t dld_cache;
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static int
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static int
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read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p);
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read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p);
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static void
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static void
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pa64_relocate_section_addresses (struct so_list *so,
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pa64_relocate_section_addresses (struct so_list *so,
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struct target_section *sec)
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struct target_section *sec)
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{
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{
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asection *asec = sec->the_bfd_section;
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asection *asec = sec->the_bfd_section;
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CORE_ADDR load_offset;
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CORE_ADDR load_offset;
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/* Relocate all the sections based on where they got loaded. */
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/* Relocate all the sections based on where they got loaded. */
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load_offset = bfd_section_vma (so->abfd, asec) - asec->filepos;
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load_offset = bfd_section_vma (so->abfd, asec) - asec->filepos;
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if (asec->flags & SEC_CODE)
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if (asec->flags & SEC_CODE)
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{
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{
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sec->addr += so->lm_info->desc.text_base - load_offset;
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sec->addr += so->lm_info->desc.text_base - load_offset;
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sec->endaddr += so->lm_info->desc.text_base - load_offset;
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sec->endaddr += so->lm_info->desc.text_base - load_offset;
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}
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}
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else if (asec->flags & SEC_DATA)
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else if (asec->flags & SEC_DATA)
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{
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{
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sec->addr += so->lm_info->desc.data_base - load_offset;
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sec->addr += so->lm_info->desc.data_base - load_offset;
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sec->endaddr += so->lm_info->desc.data_base - load_offset;
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sec->endaddr += so->lm_info->desc.data_base - load_offset;
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}
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}
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}
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}
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static void
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static void
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pa64_free_so (struct so_list *so)
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pa64_free_so (struct so_list *so)
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{
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{
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xfree (so->lm_info);
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xfree (so->lm_info);
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}
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}
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static void
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static void
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pa64_clear_solib (void)
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pa64_clear_solib (void)
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{
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{
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}
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}
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/* Wrapper for target_read_memory for dlgetmodinfo. */
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/* Wrapper for target_read_memory for dlgetmodinfo. */
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static void *
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static void *
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pa64_target_read_memory (void *buffer, CORE_ADDR ptr, size_t bufsiz, int ident)
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pa64_target_read_memory (void *buffer, CORE_ADDR ptr, size_t bufsiz, int ident)
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{
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{
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if (target_read_memory (ptr, buffer, bufsiz) != 0)
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if (target_read_memory (ptr, buffer, bufsiz) != 0)
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return 0;
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return 0;
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return buffer;
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return buffer;
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}
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}
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/* Read the dynamic linker's internal shared library descriptor.
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/* Read the dynamic linker's internal shared library descriptor.
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This must happen after dld starts running, so we can't do it in
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This must happen after dld starts running, so we can't do it in
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read_dynamic_info. Record the fact that we have loaded the
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read_dynamic_info. Record the fact that we have loaded the
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descriptor. If the library is archive bound or the load map
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descriptor. If the library is archive bound or the load map
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hasn't been setup, then return zero; else return nonzero. */
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hasn't been setup, then return zero; else return nonzero. */
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static int
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static int
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read_dld_descriptor (void)
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read_dld_descriptor (void)
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{
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{
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char *dll_path;
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char *dll_path;
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asection *dyninfo_sect;
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asection *dyninfo_sect;
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/* If necessary call read_dynamic_info to extract the contents of the
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/* If necessary call read_dynamic_info to extract the contents of the
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.dynamic section from the shared library. */
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.dynamic section from the shared library. */
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if (!dld_cache.is_valid)
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if (!dld_cache.is_valid)
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{
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{
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if (symfile_objfile == NULL)
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if (symfile_objfile == NULL)
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error (_("No object file symbols."));
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error (_("No object file symbols."));
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dyninfo_sect = bfd_get_section_by_name (symfile_objfile->obfd,
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dyninfo_sect = bfd_get_section_by_name (symfile_objfile->obfd,
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".dynamic");
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".dynamic");
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if (!dyninfo_sect)
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if (!dyninfo_sect)
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{
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{
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return 0;
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return 0;
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}
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}
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if (!read_dynamic_info (dyninfo_sect, &dld_cache))
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if (!read_dynamic_info (dyninfo_sect, &dld_cache))
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error (_("Unable to read in .dynamic section information."));
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error (_("Unable to read in .dynamic section information."));
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}
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}
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/* Read the load map pointer. */
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/* Read the load map pointer. */
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if (target_read_memory (dld_cache.load_map_addr,
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if (target_read_memory (dld_cache.load_map_addr,
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(char *) &dld_cache.load_map,
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(char *) &dld_cache.load_map,
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sizeof (dld_cache.load_map))
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sizeof (dld_cache.load_map))
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!= 0)
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!= 0)
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{
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{
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error (_("Error while reading in load map pointer."));
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error (_("Error while reading in load map pointer."));
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}
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}
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if (!dld_cache.load_map)
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if (!dld_cache.load_map)
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return 0;
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return 0;
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/* Read in the dld load module descriptor */
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/* Read in the dld load module descriptor */
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if (dlgetmodinfo (-1,
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if (dlgetmodinfo (-1,
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&dld_cache.dld_desc,
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&dld_cache.dld_desc,
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sizeof (dld_cache.dld_desc),
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sizeof (dld_cache.dld_desc),
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pa64_target_read_memory,
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pa64_target_read_memory,
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0,
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0,
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dld_cache.load_map)
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dld_cache.load_map)
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== 0)
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== 0)
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{
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{
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error (_("Error trying to get information about dynamic linker."));
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error (_("Error trying to get information about dynamic linker."));
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}
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}
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/* Indicate that we have loaded the dld descriptor. */
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/* Indicate that we have loaded the dld descriptor. */
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dld_cache.have_read_dld_descriptor = 1;
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dld_cache.have_read_dld_descriptor = 1;
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return 1;
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return 1;
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}
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}
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/* Read the .dynamic section and extract the information of interest,
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/* Read the .dynamic section and extract the information of interest,
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which is stored in dld_cache. The routine elf_locate_base in solib.c
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which is stored in dld_cache. The routine elf_locate_base in solib.c
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was used as a model for this. */
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was used as a model for this. */
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static int
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static int
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read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p)
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read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p)
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{
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{
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char *buf;
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char *buf;
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char *bufend;
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char *bufend;
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CORE_ADDR dyninfo_addr;
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CORE_ADDR dyninfo_addr;
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int dyninfo_sect_size;
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int dyninfo_sect_size;
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CORE_ADDR entry_addr;
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CORE_ADDR entry_addr;
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/* Read in .dynamic section, silently ignore errors. */
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/* Read in .dynamic section, silently ignore errors. */
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dyninfo_addr = bfd_section_vma (symfile_objfile->obfd, dyninfo_sect);
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dyninfo_addr = bfd_section_vma (symfile_objfile->obfd, dyninfo_sect);
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dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect);
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dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect);
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buf = alloca (dyninfo_sect_size);
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buf = alloca (dyninfo_sect_size);
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if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size))
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if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size))
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return 0;
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return 0;
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/* Scan the .dynamic section and record the items of interest.
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/* Scan the .dynamic section and record the items of interest.
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In particular, DT_HP_DLD_FLAGS */
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In particular, DT_HP_DLD_FLAGS */
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for (bufend = buf + dyninfo_sect_size, entry_addr = dyninfo_addr;
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for (bufend = buf + dyninfo_sect_size, entry_addr = dyninfo_addr;
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buf < bufend;
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buf < bufend;
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buf += sizeof (Elf64_Dyn), entry_addr += sizeof (Elf64_Dyn))
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buf += sizeof (Elf64_Dyn), entry_addr += sizeof (Elf64_Dyn))
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{
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{
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Elf64_Dyn *x_dynp = (Elf64_Dyn*)buf;
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Elf64_Dyn *x_dynp = (Elf64_Dyn*)buf;
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Elf64_Sxword dyn_tag;
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Elf64_Sxword dyn_tag;
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CORE_ADDR dyn_ptr;
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CORE_ADDR dyn_ptr;
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dyn_tag = bfd_h_get_64 (symfile_objfile->obfd,
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dyn_tag = bfd_h_get_64 (symfile_objfile->obfd,
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(bfd_byte*) &x_dynp->d_tag);
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(bfd_byte*) &x_dynp->d_tag);
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|
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/* We can't use a switch here because dyn_tag is 64 bits and HP's
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/* We can't use a switch here because dyn_tag is 64 bits and HP's
|
lame comiler does not handle 64bit items in switch statements. */
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lame comiler does not handle 64bit items in switch statements. */
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if (dyn_tag == DT_NULL)
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if (dyn_tag == DT_NULL)
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break;
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break;
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else if (dyn_tag == DT_HP_DLD_FLAGS)
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else if (dyn_tag == DT_HP_DLD_FLAGS)
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{
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{
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/* Set dld_flags_addr and dld_flags in *dld_cache_p */
|
/* Set dld_flags_addr and dld_flags in *dld_cache_p */
|
dld_cache_p->dld_flags_addr = entry_addr + offsetof(Elf64_Dyn, d_un);
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dld_cache_p->dld_flags_addr = entry_addr + offsetof(Elf64_Dyn, d_un);
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if (target_read_memory (dld_cache_p->dld_flags_addr,
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if (target_read_memory (dld_cache_p->dld_flags_addr,
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(char*) &dld_cache_p->dld_flags,
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(char*) &dld_cache_p->dld_flags,
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sizeof (dld_cache_p->dld_flags))
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sizeof (dld_cache_p->dld_flags))
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!= 0)
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!= 0)
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{
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{
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error (_("Error while reading in .dynamic section of the program."));
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error (_("Error while reading in .dynamic section of the program."));
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}
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}
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}
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}
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else if (dyn_tag == DT_HP_LOAD_MAP)
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else if (dyn_tag == DT_HP_LOAD_MAP)
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{
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{
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/* Dld will place the address of the load map at load_map_addr
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/* Dld will place the address of the load map at load_map_addr
|
after it starts running. */
|
after it starts running. */
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if (target_read_memory (entry_addr + offsetof(Elf64_Dyn,
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if (target_read_memory (entry_addr + offsetof(Elf64_Dyn,
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d_un.d_ptr),
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d_un.d_ptr),
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(char*) &dld_cache_p->load_map_addr,
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(char*) &dld_cache_p->load_map_addr,
|
sizeof (dld_cache_p->load_map_addr))
|
sizeof (dld_cache_p->load_map_addr))
|
!= 0)
|
!= 0)
|
{
|
{
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error (_("Error while reading in .dynamic section of the program."));
|
error (_("Error while reading in .dynamic section of the program."));
|
}
|
}
|
}
|
}
|
else
|
else
|
{
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{
|
/* tag is not of interest */
|
/* tag is not of interest */
|
}
|
}
|
}
|
}
|
|
|
/* Record other information and set is_valid to 1. */
|
/* Record other information and set is_valid to 1. */
|
dld_cache_p->dyninfo_sect = dyninfo_sect;
|
dld_cache_p->dyninfo_sect = dyninfo_sect;
|
|
|
/* Verify that we read in required info. These fields are re-set to zero
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/* Verify that we read in required info. These fields are re-set to zero
|
in pa64_solib_restart. */
|
in pa64_solib_restart. */
|
|
|
if (dld_cache_p->dld_flags_addr != 0 && dld_cache_p->load_map_addr != 0)
|
if (dld_cache_p->dld_flags_addr != 0 && dld_cache_p->load_map_addr != 0)
|
dld_cache_p->is_valid = 1;
|
dld_cache_p->is_valid = 1;
|
else
|
else
|
return 0;
|
return 0;
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/*
|
/*
|
bfd_lookup_symbol -- lookup the value for a specific symbol
|
bfd_lookup_symbol -- lookup the value for a specific symbol
|
|
|
An expensive way to lookup the value of a single symbol for
|
An expensive way to lookup the value of a single symbol for
|
bfd's that are only temporary anyway. This is used by the
|
bfd's that are only temporary anyway. This is used by the
|
shared library support to find the address of the debugger
|
shared library support to find the address of the debugger
|
interface structures in the shared library.
|
interface structures in the shared library.
|
|
|
Note that 0 is specifically allowed as an error return (no
|
Note that 0 is specifically allowed as an error return (no
|
such symbol).
|
such symbol).
|
*/
|
*/
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
bfd_lookup_symbol (bfd *abfd, char *symname)
|
bfd_lookup_symbol (bfd *abfd, char *symname)
|
{
|
{
|
unsigned int storage_needed;
|
unsigned int storage_needed;
|
asymbol *sym;
|
asymbol *sym;
|
asymbol **symbol_table;
|
asymbol **symbol_table;
|
unsigned int number_of_symbols;
|
unsigned int number_of_symbols;
|
unsigned int i;
|
unsigned int i;
|
struct cleanup *back_to;
|
struct cleanup *back_to;
|
CORE_ADDR symaddr = 0;
|
CORE_ADDR symaddr = 0;
|
|
|
storage_needed = bfd_get_symtab_upper_bound (abfd);
|
storage_needed = bfd_get_symtab_upper_bound (abfd);
|
|
|
if (storage_needed > 0)
|
if (storage_needed > 0)
|
{
|
{
|
symbol_table = (asymbol **) xmalloc (storage_needed);
|
symbol_table = (asymbol **) xmalloc (storage_needed);
|
back_to = make_cleanup (xfree, symbol_table);
|
back_to = make_cleanup (xfree, symbol_table);
|
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
|
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
|
|
|
for (i = 0; i < number_of_symbols; i++)
|
for (i = 0; i < number_of_symbols; i++)
|
{
|
{
|
sym = *symbol_table++;
|
sym = *symbol_table++;
|
if (strcmp (sym->name, symname) == 0)
|
if (strcmp (sym->name, symname) == 0)
|
{
|
{
|
/* Bfd symbols are section relative. */
|
/* Bfd symbols are section relative. */
|
symaddr = sym->value + sym->section->vma;
|
symaddr = sym->value + sym->section->vma;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
do_cleanups (back_to);
|
do_cleanups (back_to);
|
}
|
}
|
return (symaddr);
|
return (symaddr);
|
}
|
}
|
|
|
|
|
/* This hook gets called just before the first instruction in the
|
/* This hook gets called just before the first instruction in the
|
inferior process is executed.
|
inferior process is executed.
|
|
|
This is our opportunity to set magic flags in the inferior so
|
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
|
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
|
to tell the dynamic linker that a private copy of the library is
|
needed (so GDB can set breakpoints in the library).
|
needed (so GDB can set breakpoints in the library).
|
|
|
We need to set DT_HP_DEBUG_CALLBACK to indicate that we want the
|
We need to set DT_HP_DEBUG_CALLBACK to indicate that we want the
|
dynamic linker to call the breakpoint routine for significant events.
|
dynamic linker to call the breakpoint routine for significant events.
|
We used to set DT_HP_DEBUG_PRIVATE to indicate that shared libraries
|
We used to set DT_HP_DEBUG_PRIVATE to indicate that shared libraries
|
should be mapped private. However, this flag can be set using
|
should be mapped private. However, this flag can be set using
|
"chatr +dbg enable". Not setting DT_HP_DEBUG_PRIVATE allows debugging
|
"chatr +dbg enable". Not setting DT_HP_DEBUG_PRIVATE allows debugging
|
with shared libraries mapped shareable. */
|
with shared libraries mapped shareable. */
|
|
|
static void
|
static void
|
pa64_solib_create_inferior_hook (int from_tty)
|
pa64_solib_create_inferior_hook (int from_tty)
|
{
|
{
|
struct minimal_symbol *msymbol;
|
struct minimal_symbol *msymbol;
|
unsigned int dld_flags, status;
|
unsigned int dld_flags, status;
|
asection *shlib_info, *interp_sect;
|
asection *shlib_info, *interp_sect;
|
char buf[4];
|
char buf[4];
|
struct objfile *objfile;
|
struct objfile *objfile;
|
CORE_ADDR anaddr;
|
CORE_ADDR anaddr;
|
|
|
/* First, remove all the solib event breakpoints. Their addresses
|
/* First, remove all the solib event breakpoints. Their addresses
|
may have changed since the last time we ran the program. */
|
may have changed since the last time we ran the program. */
|
remove_solib_event_breakpoints ();
|
remove_solib_event_breakpoints ();
|
|
|
if (symfile_objfile == NULL)
|
if (symfile_objfile == NULL)
|
return;
|
return;
|
|
|
/* First see if the objfile was dynamically linked. */
|
/* First see if the objfile was dynamically linked. */
|
shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, ".dynamic");
|
shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, ".dynamic");
|
if (!shlib_info)
|
if (!shlib_info)
|
return;
|
return;
|
|
|
/* It's got a .dynamic section, make sure it's not empty. */
|
/* It's got a .dynamic section, make sure it's not empty. */
|
if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
|
if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
|
return;
|
return;
|
|
|
/* Read in the .dynamic section. */
|
/* Read in the .dynamic section. */
|
if (! read_dynamic_info (shlib_info, &dld_cache))
|
if (! read_dynamic_info (shlib_info, &dld_cache))
|
error (_("Unable to read the .dynamic section."));
|
error (_("Unable to read the .dynamic section."));
|
|
|
/* If the libraries were not mapped private, warn the user. */
|
/* If the libraries were not mapped private, warn the user. */
|
if ((dld_cache.dld_flags & DT_HP_DEBUG_PRIVATE) == 0)
|
if ((dld_cache.dld_flags & DT_HP_DEBUG_PRIVATE) == 0)
|
warning
|
warning
|
(_("Private mapping of shared library text was not specified\n"
|
(_("Private mapping of shared library text was not specified\n"
|
"by the executable; setting a breakpoint in a shared library which\n"
|
"by the executable; setting a breakpoint in a shared library which\n"
|
"is not privately mapped will not work. See the HP-UX 11i v3 chatr\n"
|
"is not privately mapped will not work. See the HP-UX 11i v3 chatr\n"
|
"manpage for methods to privately map shared library text."));
|
"manpage for methods to privately map shared library text."));
|
|
|
/* Turn on the flags we care about. */
|
/* Turn on the flags we care about. */
|
dld_cache.dld_flags |= DT_HP_DEBUG_CALLBACK;
|
dld_cache.dld_flags |= DT_HP_DEBUG_CALLBACK;
|
status = target_write_memory (dld_cache.dld_flags_addr,
|
status = target_write_memory (dld_cache.dld_flags_addr,
|
(char *) &dld_cache.dld_flags,
|
(char *) &dld_cache.dld_flags,
|
sizeof (dld_cache.dld_flags));
|
sizeof (dld_cache.dld_flags));
|
if (status != 0)
|
if (status != 0)
|
error (_("Unable to modify dynamic linker flags."));
|
error (_("Unable to modify dynamic linker flags."));
|
|
|
/* Now we have to create a shared library breakpoint in the dynamic
|
/* Now we have to create a shared library breakpoint in the dynamic
|
linker. This can be somewhat tricky since the symbol is inside
|
linker. This can be somewhat tricky since the symbol is inside
|
the dynamic linker (for which we do not have symbols or a base
|
the dynamic linker (for which we do not have symbols or a base
|
load address! Luckily I wrote this code for solib.c years ago. */
|
load address! Luckily I wrote this code for solib.c years ago. */
|
interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
|
interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
|
if (interp_sect)
|
if (interp_sect)
|
{
|
{
|
unsigned int interp_sect_size;
|
unsigned int interp_sect_size;
|
char *buf;
|
char *buf;
|
CORE_ADDR load_addr;
|
CORE_ADDR load_addr;
|
bfd *tmp_bfd;
|
bfd *tmp_bfd;
|
CORE_ADDR sym_addr = 0;
|
CORE_ADDR sym_addr = 0;
|
|
|
/* Read the contents of the .interp section into a local buffer;
|
/* Read the contents of the .interp section into a local buffer;
|
the contents specify the dynamic linker this program uses. */
|
the contents specify the dynamic linker this program uses. */
|
interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
|
interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
|
buf = alloca (interp_sect_size);
|
buf = alloca (interp_sect_size);
|
bfd_get_section_contents (exec_bfd, interp_sect,
|
bfd_get_section_contents (exec_bfd, interp_sect,
|
buf, 0, interp_sect_size);
|
buf, 0, interp_sect_size);
|
|
|
/* Now we need to figure out where the dynamic linker was
|
/* Now we need to figure out where the dynamic linker was
|
loaded so that we can load its symbols and place a breakpoint
|
loaded so that we can load its symbols and place a breakpoint
|
in the dynamic linker itself.
|
in the dynamic linker itself.
|
|
|
This address is stored on the stack. However, I've been unable
|
This address is stored on the stack. However, I've been unable
|
to find any magic formula to find it for Solaris (appears to
|
to find any magic formula to find it for Solaris (appears to
|
be trivial on GNU/Linux). Therefore, we have to try an alternate
|
be trivial on GNU/Linux). Therefore, we have to try an alternate
|
mechanism to find the dynamic linker's base address. */
|
mechanism to find the dynamic linker's base address. */
|
tmp_bfd = bfd_openr (buf, gnutarget);
|
tmp_bfd = bfd_openr (buf, gnutarget);
|
if (tmp_bfd == NULL)
|
if (tmp_bfd == NULL)
|
return;
|
return;
|
|
|
/* Make sure the dynamic linker's really a useful object. */
|
/* Make sure the dynamic linker's really a useful object. */
|
if (!bfd_check_format (tmp_bfd, bfd_object))
|
if (!bfd_check_format (tmp_bfd, bfd_object))
|
{
|
{
|
warning (_("Unable to grok dynamic linker %s as an object file"), buf);
|
warning (_("Unable to grok dynamic linker %s as an object file"), buf);
|
bfd_close (tmp_bfd);
|
bfd_close (tmp_bfd);
|
return;
|
return;
|
}
|
}
|
|
|
/* We find the dynamic linker's base address by examining the
|
/* We find the dynamic linker's base address by examining the
|
current pc (which point at the entry point for the dynamic
|
current pc (which point at the entry point for the dynamic
|
linker) and subtracting the offset of the entry point.
|
linker) and subtracting the offset of the entry point.
|
|
|
Also note the breakpoint is the second instruction in the
|
Also note the breakpoint is the second instruction in the
|
routine. */
|
routine. */
|
load_addr = regcache_read_pc (get_current_regcache ())
|
load_addr = regcache_read_pc (get_current_regcache ())
|
- tmp_bfd->start_address;
|
- tmp_bfd->start_address;
|
sym_addr = bfd_lookup_symbol (tmp_bfd, "__dld_break");
|
sym_addr = bfd_lookup_symbol (tmp_bfd, "__dld_break");
|
sym_addr = load_addr + sym_addr + 4;
|
sym_addr = load_addr + sym_addr + 4;
|
|
|
/* Create the shared library breakpoint. */
|
/* Create the shared library breakpoint. */
|
{
|
{
|
struct breakpoint *b
|
struct breakpoint *b
|
= create_solib_event_breakpoint (target_gdbarch, sym_addr);
|
= create_solib_event_breakpoint (target_gdbarch, sym_addr);
|
|
|
/* The breakpoint is actually hard-coded into the dynamic linker,
|
/* The breakpoint is actually hard-coded into the dynamic linker,
|
so we don't need to actually insert a breakpoint instruction
|
so we don't need to actually insert a breakpoint instruction
|
there. In fact, the dynamic linker's code is immutable, even to
|
there. In fact, the dynamic linker's code is immutable, even to
|
ttrace, so we shouldn't even try to do that. For cases like
|
ttrace, so we shouldn't even try to do that. For cases like
|
this, we have "permanent" breakpoints. */
|
this, we have "permanent" breakpoints. */
|
make_breakpoint_permanent (b);
|
make_breakpoint_permanent (b);
|
}
|
}
|
|
|
/* We're done with the temporary bfd. */
|
/* We're done with the temporary bfd. */
|
bfd_close (tmp_bfd);
|
bfd_close (tmp_bfd);
|
}
|
}
|
}
|
}
|
|
|
static void
|
static void
|
pa64_special_symbol_handling (void)
|
pa64_special_symbol_handling (void)
|
{
|
{
|
}
|
}
|
|
|
static struct so_list *
|
static struct so_list *
|
pa64_current_sos (void)
|
pa64_current_sos (void)
|
{
|
{
|
struct so_list *head = 0;
|
struct so_list *head = 0;
|
struct so_list **link_ptr = &head;
|
struct so_list **link_ptr = &head;
|
int dll_index;
|
int dll_index;
|
|
|
/* Read in the load map pointer if we have not done so already. */
|
/* Read in the load map pointer if we have not done so already. */
|
if (! dld_cache.have_read_dld_descriptor)
|
if (! dld_cache.have_read_dld_descriptor)
|
if (! read_dld_descriptor ())
|
if (! read_dld_descriptor ())
|
return NULL;
|
return NULL;
|
|
|
for (dll_index = -1; ; dll_index++)
|
for (dll_index = -1; ; dll_index++)
|
{
|
{
|
struct load_module_desc dll_desc;
|
struct load_module_desc dll_desc;
|
char *dll_path;
|
char *dll_path;
|
struct so_list *new;
|
struct so_list *new;
|
struct cleanup *old_chain;
|
struct cleanup *old_chain;
|
|
|
if (dll_index == 0)
|
if (dll_index == 0)
|
continue;
|
continue;
|
|
|
/* Read in the load module descriptor. */
|
/* Read in the load module descriptor. */
|
if (dlgetmodinfo (dll_index, &dll_desc, sizeof (dll_desc),
|
if (dlgetmodinfo (dll_index, &dll_desc, sizeof (dll_desc),
|
pa64_target_read_memory, 0, dld_cache.load_map)
|
pa64_target_read_memory, 0, dld_cache.load_map)
|
== 0)
|
== 0)
|
break;
|
break;
|
|
|
/* Get the name of the shared library. */
|
/* Get the name of the shared library. */
|
dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
|
dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
|
pa64_target_read_memory,
|
pa64_target_read_memory,
|
0, dld_cache.load_map);
|
0, dld_cache.load_map);
|
|
|
new = (struct so_list *) xmalloc (sizeof (struct so_list));
|
new = (struct so_list *) xmalloc (sizeof (struct so_list));
|
memset (new, 0, sizeof (struct so_list));
|
memset (new, 0, sizeof (struct so_list));
|
new->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info));
|
new->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info));
|
memset (new->lm_info, 0, sizeof (struct lm_info));
|
memset (new->lm_info, 0, sizeof (struct lm_info));
|
|
|
strncpy (new->so_name, dll_path, SO_NAME_MAX_PATH_SIZE - 1);
|
strncpy (new->so_name, dll_path, SO_NAME_MAX_PATH_SIZE - 1);
|
new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
|
new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
|
strcpy (new->so_original_name, new->so_name);
|
strcpy (new->so_original_name, new->so_name);
|
|
|
memcpy (&new->lm_info->desc, &dll_desc, sizeof (dll_desc));
|
memcpy (&new->lm_info->desc, &dll_desc, sizeof (dll_desc));
|
|
|
#ifdef SOLIB_PA64_DBG
|
#ifdef SOLIB_PA64_DBG
|
{
|
{
|
struct load_module_desc *d = &new->lm_info->desc;
|
struct load_module_desc *d = &new->lm_info->desc;
|
printf ("\n+ library \"%s\" is described at index %d\n", new->so_name,
|
printf ("\n+ library \"%s\" is described at index %d\n", new->so_name,
|
dll_index);
|
dll_index);
|
printf (" text_base = 0x%llx\n", d->text_base);
|
printf (" text_base = 0x%llx\n", d->text_base);
|
printf (" text_size = 0x%llx\n", d->text_size);
|
printf (" text_size = 0x%llx\n", d->text_size);
|
printf (" data_base = 0x%llx\n", d->data_base);
|
printf (" data_base = 0x%llx\n", d->data_base);
|
printf (" data_size = 0x%llx\n", d->data_size);
|
printf (" data_size = 0x%llx\n", d->data_size);
|
printf (" unwind_base = 0x%llx\n", d->unwind_base);
|
printf (" unwind_base = 0x%llx\n", d->unwind_base);
|
printf (" linkage_ptr = 0x%llx\n", d->linkage_ptr);
|
printf (" linkage_ptr = 0x%llx\n", d->linkage_ptr);
|
printf (" phdr_base = 0x%llx\n", d->phdr_base);
|
printf (" phdr_base = 0x%llx\n", d->phdr_base);
|
printf (" tls_size = 0x%llx\n", d->tls_size);
|
printf (" tls_size = 0x%llx\n", d->tls_size);
|
printf (" tls_start_addr = 0x%llx\n", d->tls_start_addr);
|
printf (" tls_start_addr = 0x%llx\n", d->tls_start_addr);
|
printf (" unwind_size = 0x%llx\n", d->unwind_size);
|
printf (" unwind_size = 0x%llx\n", d->unwind_size);
|
printf (" tls_index = 0x%llx\n", d->tls_index);
|
printf (" tls_index = 0x%llx\n", d->tls_index);
|
}
|
}
|
#endif
|
#endif
|
|
|
/* Link the new object onto the list. */
|
/* Link the new object onto the list. */
|
new->next = NULL;
|
new->next = NULL;
|
*link_ptr = new;
|
*link_ptr = new;
|
link_ptr = &new->next;
|
link_ptr = &new->next;
|
}
|
}
|
|
|
return head;
|
return head;
|
}
|
}
|
|
|
static int
|
static int
|
pa64_open_symbol_file_object (void *from_ttyp)
|
pa64_open_symbol_file_object (void *from_ttyp)
|
{
|
{
|
int from_tty = *(int *)from_ttyp;
|
int from_tty = *(int *)from_ttyp;
|
char buf[4];
|
char buf[4];
|
struct load_module_desc dll_desc;
|
struct load_module_desc dll_desc;
|
char *dll_path;
|
char *dll_path;
|
|
|
if (symfile_objfile)
|
if (symfile_objfile)
|
if (!query (_("Attempt to reload symbols from process? ")))
|
if (!query (_("Attempt to reload symbols from process? ")))
|
return 0;
|
return 0;
|
|
|
/* Read in the load map pointer if we have not done so already. */
|
/* Read in the load map pointer if we have not done so already. */
|
if (! dld_cache.have_read_dld_descriptor)
|
if (! dld_cache.have_read_dld_descriptor)
|
if (! read_dld_descriptor ())
|
if (! read_dld_descriptor ())
|
return 0;
|
return 0;
|
|
|
/* Read in the load module descriptor. */
|
/* Read in the load module descriptor. */
|
if (dlgetmodinfo (0, &dll_desc, sizeof (dll_desc),
|
if (dlgetmodinfo (0, &dll_desc, sizeof (dll_desc),
|
pa64_target_read_memory, 0, dld_cache.load_map) == 0)
|
pa64_target_read_memory, 0, dld_cache.load_map) == 0)
|
return 0;
|
return 0;
|
|
|
/* Get the name of the shared library. */
|
/* Get the name of the shared library. */
|
dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
|
dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
|
pa64_target_read_memory,
|
pa64_target_read_memory,
|
0, dld_cache.load_map);
|
0, dld_cache.load_map);
|
|
|
/* Have a pathname: read the symbol file. */
|
/* Have a pathname: read the symbol file. */
|
symbol_file_add_main (dll_path, from_tty);
|
symbol_file_add_main (dll_path, from_tty);
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Return nonzero if PC is an address inside the dynamic linker. */
|
/* Return nonzero if PC is an address inside the dynamic linker. */
|
static int
|
static int
|
pa64_in_dynsym_resolve_code (CORE_ADDR pc)
|
pa64_in_dynsym_resolve_code (CORE_ADDR pc)
|
{
|
{
|
asection *shlib_info;
|
asection *shlib_info;
|
|
|
if (symfile_objfile == NULL)
|
if (symfile_objfile == NULL)
|
return 0;
|
return 0;
|
|
|
if (!dld_cache.have_read_dld_descriptor)
|
if (!dld_cache.have_read_dld_descriptor)
|
if (!read_dld_descriptor ())
|
if (!read_dld_descriptor ())
|
return 0;
|
return 0;
|
|
|
return (pc >= dld_cache.dld_desc.text_base
|
return (pc >= dld_cache.dld_desc.text_base
|
&& pc < dld_cache.dld_desc.text_base + dld_cache.dld_desc.text_size);
|
&& pc < dld_cache.dld_desc.text_base + dld_cache.dld_desc.text_size);
|
}
|
}
|
|
|
|
|
/* Return the GOT value for the shared library in which ADDR belongs. If
|
/* Return the GOT value for the shared library in which ADDR belongs. If
|
ADDR isn't in any known shared library, return zero. */
|
ADDR isn't in any known shared library, return zero. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
pa64_solib_get_got_by_pc (CORE_ADDR addr)
|
pa64_solib_get_got_by_pc (CORE_ADDR addr)
|
{
|
{
|
struct so_list *so_list = master_so_list ();
|
struct so_list *so_list = master_so_list ();
|
CORE_ADDR got_value = 0;
|
CORE_ADDR got_value = 0;
|
|
|
while (so_list)
|
while (so_list)
|
{
|
{
|
if (so_list->lm_info->desc.text_base <= addr
|
if (so_list->lm_info->desc.text_base <= addr
|
&& ((so_list->lm_info->desc.text_base
|
&& ((so_list->lm_info->desc.text_base
|
+ so_list->lm_info->desc.text_size)
|
+ so_list->lm_info->desc.text_size)
|
> addr))
|
> addr))
|
{
|
{
|
got_value = so_list->lm_info->desc.linkage_ptr;
|
got_value = so_list->lm_info->desc.linkage_ptr;
|
break;
|
break;
|
}
|
}
|
so_list = so_list->next;
|
so_list = so_list->next;
|
}
|
}
|
return got_value;
|
return got_value;
|
}
|
}
|
|
|
/* Get some HPUX-specific data from a shared lib. */
|
/* Get some HPUX-specific data from a shared lib. */
|
static CORE_ADDR
|
static CORE_ADDR
|
pa64_solib_thread_start_addr (struct so_list *so)
|
pa64_solib_thread_start_addr (struct so_list *so)
|
{
|
{
|
return so->lm_info->desc.tls_start_addr;
|
return so->lm_info->desc.tls_start_addr;
|
}
|
}
|
|
|
|
|
/* Return the address of the handle of the shared library in which ADDR
|
/* 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. */
|
belongs. If ADDR isn't in any known shared library, return zero. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
pa64_solib_get_solib_by_pc (CORE_ADDR addr)
|
pa64_solib_get_solib_by_pc (CORE_ADDR addr)
|
{
|
{
|
struct so_list *so_list = master_so_list ();
|
struct so_list *so_list = master_so_list ();
|
CORE_ADDR retval = 0;
|
CORE_ADDR retval = 0;
|
|
|
while (so_list)
|
while (so_list)
|
{
|
{
|
if (so_list->lm_info->desc.text_base <= addr
|
if (so_list->lm_info->desc.text_base <= addr
|
&& ((so_list->lm_info->desc.text_base
|
&& ((so_list->lm_info->desc.text_base
|
+ so_list->lm_info->desc.text_size)
|
+ so_list->lm_info->desc.text_size)
|
> addr))
|
> addr))
|
{
|
{
|
retval = so_list->lm_info->desc_addr;
|
retval = so_list->lm_info->desc_addr;
|
break;
|
break;
|
}
|
}
|
so_list = so_list->next;
|
so_list = so_list->next;
|
}
|
}
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* pa64 libraries do not seem to set the section offsets in a standard (i.e.
|
/* pa64 libraries do not seem to set the section offsets in a standard (i.e.
|
SVr4) way; the text section offset stored in the file doesn't correspond
|
SVr4) way; the text section offset stored in the file doesn't correspond
|
to the place where the library is actually loaded into memory. Instead,
|
to the place where the library is actually loaded into memory. Instead,
|
we rely on the dll descriptor to tell us where things were loaded. */
|
we rely on the dll descriptor to tell us where things were loaded. */
|
static CORE_ADDR
|
static CORE_ADDR
|
pa64_solib_get_text_base (struct objfile *objfile)
|
pa64_solib_get_text_base (struct objfile *objfile)
|
{
|
{
|
struct so_list *so;
|
struct so_list *so;
|
|
|
for (so = master_so_list (); so; so = so->next)
|
for (so = master_so_list (); so; so = so->next)
|
if (so->objfile == objfile)
|
if (so->objfile == objfile)
|
return so->lm_info->desc.text_base;
|
return so->lm_info->desc.text_base;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct target_so_ops pa64_so_ops;
|
static struct target_so_ops pa64_so_ops;
|
|
|
extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
|
extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
|
|
|
void
|
void
|
_initialize_pa64_solib (void)
|
_initialize_pa64_solib (void)
|
{
|
{
|
pa64_so_ops.relocate_section_addresses = pa64_relocate_section_addresses;
|
pa64_so_ops.relocate_section_addresses = pa64_relocate_section_addresses;
|
pa64_so_ops.free_so = pa64_free_so;
|
pa64_so_ops.free_so = pa64_free_so;
|
pa64_so_ops.clear_solib = pa64_clear_solib;
|
pa64_so_ops.clear_solib = pa64_clear_solib;
|
pa64_so_ops.solib_create_inferior_hook = pa64_solib_create_inferior_hook;
|
pa64_so_ops.solib_create_inferior_hook = pa64_solib_create_inferior_hook;
|
pa64_so_ops.special_symbol_handling = pa64_special_symbol_handling;
|
pa64_so_ops.special_symbol_handling = pa64_special_symbol_handling;
|
pa64_so_ops.current_sos = pa64_current_sos;
|
pa64_so_ops.current_sos = pa64_current_sos;
|
pa64_so_ops.open_symbol_file_object = pa64_open_symbol_file_object;
|
pa64_so_ops.open_symbol_file_object = pa64_open_symbol_file_object;
|
pa64_so_ops.in_dynsym_resolve_code = pa64_in_dynsym_resolve_code;
|
pa64_so_ops.in_dynsym_resolve_code = pa64_in_dynsym_resolve_code;
|
pa64_so_ops.bfd_open = solib_bfd_open;
|
pa64_so_ops.bfd_open = solib_bfd_open;
|
|
|
memset (&dld_cache, 0, sizeof (dld_cache));
|
memset (&dld_cache, 0, sizeof (dld_cache));
|
}
|
}
|
|
|
void pa64_solib_select (struct gdbarch *gdbarch)
|
void pa64_solib_select (struct gdbarch *gdbarch)
|
{
|
{
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
set_solib_ops (gdbarch, &pa64_so_ops);
|
set_solib_ops (gdbarch, &pa64_so_ops);
|
|
|
tdep->solib_thread_start_addr = pa64_solib_thread_start_addr;
|
tdep->solib_thread_start_addr = pa64_solib_thread_start_addr;
|
tdep->solib_get_got_by_pc = pa64_solib_get_got_by_pc;
|
tdep->solib_get_got_by_pc = pa64_solib_get_got_by_pc;
|
tdep->solib_get_solib_by_pc = pa64_solib_get_solib_by_pc;
|
tdep->solib_get_solib_by_pc = pa64_solib_get_solib_by_pc;
|
tdep->solib_get_text_base = pa64_solib_get_text_base;
|
tdep->solib_get_text_base = pa64_solib_get_text_base;
|
}
|
}
|
|
|
#else /* HAVE_ELF_HP_H */
|
#else /* HAVE_ELF_HP_H */
|
|
|
extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
|
extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
|
|
|
void
|
void
|
_initialize_pa64_solib (void)
|
_initialize_pa64_solib (void)
|
{
|
{
|
}
|
}
|
|
|
void pa64_solib_select (struct gdbarch *gdbarch)
|
void pa64_solib_select (struct gdbarch *gdbarch)
|
{
|
{
|
/* For a SOM-only target, there is no pa64 solib support. This is needed
|
/* For a SOM-only target, there is no pa64 solib support. This is needed
|
for hppa-hpux-tdep.c to build. */
|
for hppa-hpux-tdep.c to build. */
|
error (_("Cannot select pa64 solib support for this configuration."));
|
error (_("Cannot select pa64 solib support for this configuration."));
|
}
|
}
|
#endif
|
#endif
|
|
|
