| /* Copyright (C) 2013-2016 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "solib-aix.h" |
| #include "solist.h" |
| #include "inferior.h" |
| #include "gdb_bfd.h" |
| #include "gdbcore.h" |
| #include "objfiles.h" |
| #include "symtab.h" |
| #include "xcoffread.h" |
| #include "observer.h" |
| #include "gdbcmd.h" |
| |
| /* Variable controlling the output of the debugging traces for |
| this module. */ |
| static int solib_aix_debug; |
| |
| /* Our private data in struct so_list. */ |
| |
| struct lm_info |
| { |
| /* The name of the file mapped by the loader. Apart from the entry |
| for the main executable, this is usually a shared library (which, |
| on AIX, is an archive library file, created using the "ar" |
| command). */ |
| char *filename; |
| |
| /* The name of the shared object file with the actual dynamic |
| loading dependency. This may be NULL (Eg. main executable). */ |
| char *member_name; |
| |
| /* The address in inferior memory where the text section got mapped. */ |
| CORE_ADDR text_addr; |
| |
| /* The size of the text section, obtained via the loader data. */ |
| ULONGEST text_size; |
| |
| /* The address in inferior memory where the data section got mapped. */ |
| CORE_ADDR data_addr; |
| |
| /* The size of the data section, obtained via the loader data. */ |
| ULONGEST data_size; |
| }; |
| |
| typedef struct lm_info *lm_info_p; |
| DEF_VEC_P(lm_info_p); |
| |
| /* Return a deep copy of the given struct lm_info object. */ |
| |
| static struct lm_info * |
| solib_aix_new_lm_info (struct lm_info *info) |
| { |
| struct lm_info *result = XNEW (struct lm_info); |
| |
| memcpy (result, info, sizeof (struct lm_info)); |
| result->filename = xstrdup (info->filename); |
| if (info->member_name != NULL) |
| result->member_name = xstrdup (info->member_name); |
| |
| return result; |
| } |
| |
| /* Free the memory allocated for the given lm_info. */ |
| |
| static void |
| solib_aix_xfree_lm_info (struct lm_info *info) |
| { |
| xfree (info->filename); |
| xfree (info->member_name); |
| xfree (info); |
| } |
| |
| /* This module's per-inferior data. */ |
| |
| struct solib_aix_inferior_data |
| { |
| /* The list of shared libraries. NULL if not computed yet. |
| |
| Note that the first element of this list is always the main |
| executable, which is not technically a shared library. But |
| we need that information to perform its relocation, and |
| the same principles applied to shared libraries also apply |
| to the main executable. So it's simpler to keep it as part |
| of this list. */ |
| VEC (lm_info_p) *library_list; |
| }; |
| |
| /* Key to our per-inferior data. */ |
| static const struct inferior_data *solib_aix_inferior_data_handle; |
| |
| /* Return this module's data for the given inferior. |
| If none is found, add a zero'ed one now. */ |
| |
| static struct solib_aix_inferior_data * |
| get_solib_aix_inferior_data (struct inferior *inf) |
| { |
| struct solib_aix_inferior_data *data; |
| |
| data = ((struct solib_aix_inferior_data *) |
| inferior_data (inf, solib_aix_inferior_data_handle)); |
| if (data == NULL) |
| { |
| data = XCNEW (struct solib_aix_inferior_data); |
| set_inferior_data (inf, solib_aix_inferior_data_handle, data); |
| } |
| |
| return data; |
| } |
| |
| #if !defined(HAVE_LIBEXPAT) |
| |
| /* Dummy implementation if XML support is not compiled in. */ |
| |
| static VEC (lm_info_p) * |
| solib_aix_parse_libraries (const char *library) |
| { |
| static int have_warned; |
| |
| if (!have_warned) |
| { |
| have_warned = 1; |
| warning (_("Can not parse XML library list; XML support was disabled " |
| "at compile time")); |
| } |
| |
| return NULL; |
| } |
| |
| /* Dummy implementation if XML support is not compiled in. */ |
| |
| static void |
| solib_aix_free_library_list (void *p) |
| { |
| } |
| |
| #else /* HAVE_LIBEXPAT */ |
| |
| #include "xml-support.h" |
| |
| /* Handle the start of a <library> element. */ |
| |
| static void |
| library_list_start_library (struct gdb_xml_parser *parser, |
| const struct gdb_xml_element *element, |
| void *user_data, |
| VEC (gdb_xml_value_s) *attributes) |
| { |
| VEC (lm_info_p) **list = (VEC (lm_info_p) **) user_data; |
| struct lm_info *item = XCNEW (struct lm_info); |
| struct gdb_xml_value *attr; |
| |
| attr = xml_find_attribute (attributes, "name"); |
| item->filename = xstrdup ((const char *) attr->value); |
| |
| attr = xml_find_attribute (attributes, "member"); |
| if (attr != NULL) |
| item->member_name = xstrdup ((const char *) attr->value); |
| |
| attr = xml_find_attribute (attributes, "text_addr"); |
| item->text_addr = * (ULONGEST *) attr->value; |
| |
| attr = xml_find_attribute (attributes, "text_size"); |
| item->text_size = * (ULONGEST *) attr->value; |
| |
| attr = xml_find_attribute (attributes, "data_addr"); |
| item->data_addr = * (ULONGEST *) attr->value; |
| |
| attr = xml_find_attribute (attributes, "data_size"); |
| item->data_size = * (ULONGEST *) attr->value; |
| |
| VEC_safe_push (lm_info_p, *list, item); |
| } |
| |
| /* Handle the start of a <library-list-aix> element. */ |
| |
| static void |
| library_list_start_list (struct gdb_xml_parser *parser, |
| const struct gdb_xml_element *element, |
| void *user_data, VEC (gdb_xml_value_s) *attributes) |
| { |
| char *version = (char *) xml_find_attribute (attributes, "version")->value; |
| |
| if (strcmp (version, "1.0") != 0) |
| gdb_xml_error (parser, |
| _("Library list has unsupported version \"%s\""), |
| version); |
| } |
| |
| /* Discard the constructed library list. */ |
| |
| static void |
| solib_aix_free_library_list (void *p) |
| { |
| VEC (lm_info_p) **result = (VEC (lm_info_p) **) p; |
| struct lm_info *info; |
| int ix; |
| |
| if (solib_aix_debug) |
| fprintf_unfiltered (gdb_stdlog, "DEBUG: solib_aix_free_library_list\n"); |
| |
| for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++) |
| solib_aix_xfree_lm_info (info); |
| VEC_free (lm_info_p, *result); |
| *result = NULL; |
| } |
| |
| /* The allowed elements and attributes for an AIX library list |
| described in XML format. The root element is a <library-list-aix>. */ |
| |
| static const struct gdb_xml_attribute library_attributes[] = |
| { |
| { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| { "member", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
| { "text_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| { "text_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| { "data_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| { "data_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
| { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| }; |
| |
| static const struct gdb_xml_element library_list_children[] = |
| { |
| { "library", library_attributes, NULL, |
| GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| library_list_start_library, NULL}, |
| { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| }; |
| |
| static const struct gdb_xml_attribute library_list_attributes[] = |
| { |
| { "version", GDB_XML_AF_NONE, NULL, NULL }, |
| { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| }; |
| |
| static const struct gdb_xml_element library_list_elements[] = |
| { |
| { "library-list-aix", library_list_attributes, library_list_children, |
| GDB_XML_EF_NONE, library_list_start_list, NULL }, |
| { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| }; |
| |
| /* Parse LIBRARY, a string containing the loader info in XML format, |
| and return an lm_info_p vector. |
| |
| Return NULL if the parsing failed. */ |
| |
| static VEC (lm_info_p) * |
| solib_aix_parse_libraries (const char *library) |
| { |
| VEC (lm_info_p) *result = NULL; |
| struct cleanup *back_to = make_cleanup (solib_aix_free_library_list, |
| &result); |
| |
| if (gdb_xml_parse_quick (_("aix library list"), "library-list-aix.dtd", |
| library_list_elements, library, &result) == 0) |
| { |
| /* Parsed successfully, keep the result. */ |
| discard_cleanups (back_to); |
| return result; |
| } |
| |
| do_cleanups (back_to); |
| return NULL; |
| } |
| |
| #endif /* HAVE_LIBEXPAT */ |
| |
| /* Return the loader info for the given inferior (INF), or NULL if |
| the list could not be computed. |
| |
| Cache the result in per-inferior data, so as to avoid recomputing it |
| each time this function is called. |
| |
| If an error occurs while computing this list, and WARNING_MSG |
| is not NULL, then print a warning including WARNING_MSG and |
| a description of the error. */ |
| |
| static VEC (lm_info_p) * |
| solib_aix_get_library_list (struct inferior *inf, const char *warning_msg) |
| { |
| struct solib_aix_inferior_data *data; |
| char *library_document; |
| struct cleanup *cleanup; |
| |
| /* If already computed, return the cached value. */ |
| data = get_solib_aix_inferior_data (inf); |
| if (data->library_list != NULL) |
| return data->library_list; |
| |
| library_document = target_read_stralloc (¤t_target, |
| TARGET_OBJECT_LIBRARIES_AIX, |
| NULL); |
| if (library_document == NULL && warning_msg != NULL) |
| { |
| warning (_("%s (failed to read TARGET_OBJECT_LIBRARIES_AIX)"), |
| warning_msg); |
| return NULL; |
| } |
| cleanup = make_cleanup (xfree, library_document); |
| |
| if (solib_aix_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "DEBUG: TARGET_OBJECT_LIBRARIES_AIX = \n%s\n", |
| library_document); |
| |
| data->library_list = solib_aix_parse_libraries (library_document); |
| if (data->library_list == NULL && warning_msg != NULL) |
| { |
| warning (_("%s (missing XML support?)"), warning_msg); |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| do_cleanups (cleanup); |
| return data->library_list; |
| } |
| |
| /* If the .bss section's VMA is set to an address located before |
| the end of the .data section, causing the two sections to overlap, |
| return the overlap in bytes. Otherwise, return zero. |
| |
| Motivation: |
| |
| The GNU linker sometimes sets the start address of the .bss session |
| before the end of the .data section, making the 2 sections overlap. |
| The loader appears to handle this situation gracefully, by simply |
| loading the bss section right after the end of the .data section. |
| |
| This means that the .data and the .bss sections are sometimes |
| no longer relocated by the same amount. The problem is that |
| the ldinfo data does not contain any information regarding |
| the relocation of the .bss section, assuming that it would be |
| identical to the information provided for the .data section |
| (this is what would normally happen if the program was linked |
| correctly). |
| |
| GDB therefore needs to detect those cases, and make the corresponding |
| adjustment to the .bss section offset computed from the ldinfo data |
| when necessary. This function returns the adjustment amount (or |
| zero when no adjustment is needed). */ |
| |
| static CORE_ADDR |
| solib_aix_bss_data_overlap (bfd *abfd) |
| { |
| struct bfd_section *data_sect, *bss_sect; |
| |
| data_sect = bfd_get_section_by_name (abfd, ".data"); |
| if (data_sect == NULL) |
| return 0; /* No overlap possible. */ |
| |
| bss_sect = bfd_get_section_by_name (abfd, ".bss"); |
| if (bss_sect == NULL) |
| return 0; /* No overlap possible. */ |
| |
| /* Assume the problem only occurs with linkers that place the .bss |
| section after the .data section (the problem has only been |
| observed when using the GNU linker, and the default linker |
| script always places the .data and .bss sections in that order). */ |
| if (bfd_section_vma (abfd, bss_sect) |
| < bfd_section_vma (abfd, data_sect)) |
| return 0; |
| |
| if (bfd_section_vma (abfd, bss_sect) |
| < bfd_section_vma (abfd, data_sect) + bfd_get_section_size (data_sect)) |
| return ((bfd_section_vma (abfd, data_sect) |
| + bfd_get_section_size (data_sect)) |
| - bfd_section_vma (abfd, bss_sect)); |
| |
| return 0; |
| } |
| |
| /* Implement the "relocate_section_addresses" target_so_ops method. */ |
| |
| static void |
| solib_aix_relocate_section_addresses (struct so_list *so, |
| struct target_section *sec) |
| { |
| struct bfd_section *bfd_sect = sec->the_bfd_section; |
| bfd *abfd = bfd_sect->owner; |
| const char *section_name = bfd_section_name (abfd, bfd_sect); |
| struct lm_info *info = so->lm_info; |
| |
| if (strcmp (section_name, ".text") == 0) |
| { |
| sec->addr = info->text_addr; |
| sec->endaddr = sec->addr + info->text_size; |
| |
| /* The text address given to us by the loader contains |
| XCOFF headers, so we need to adjust by this much. */ |
| sec->addr += bfd_sect->filepos; |
| } |
| else if (strcmp (section_name, ".data") == 0) |
| { |
| sec->addr = info->data_addr; |
| sec->endaddr = sec->addr + info->data_size; |
| } |
| else if (strcmp (section_name, ".bss") == 0) |
| { |
| /* The information provided by the loader does not include |
| the address of the .bss section, but we know that it gets |
| relocated by the same offset as the .data section. So, |
| compute the relocation offset for the .data section, and |
| apply it to the .bss section as well. If the .data section |
| is not defined (which seems highly unlikely), do our best |
| by assuming no relocation. */ |
| struct bfd_section *data_sect |
| = bfd_get_section_by_name (abfd, ".data"); |
| CORE_ADDR data_offset = 0; |
| |
| if (data_sect != NULL) |
| data_offset = info->data_addr - bfd_section_vma (abfd, data_sect); |
| |
| sec->addr = bfd_section_vma (abfd, bfd_sect) + data_offset; |
| sec->addr += solib_aix_bss_data_overlap (abfd); |
| sec->endaddr = sec->addr + bfd_section_size (abfd, bfd_sect); |
| } |
| else |
| { |
| /* All other sections should not be relocated. */ |
| sec->addr = bfd_section_vma (abfd, bfd_sect); |
| sec->endaddr = sec->addr + bfd_section_size (abfd, bfd_sect); |
| } |
| } |
| |
| /* Implement the "free_so" target_so_ops method. */ |
| |
| static void |
| solib_aix_free_so (struct so_list *so) |
| { |
| if (solib_aix_debug) |
| fprintf_unfiltered (gdb_stdlog, "DEBUG: solib_aix_free_so (%s)\n", |
| so->so_name); |
| solib_aix_xfree_lm_info (so->lm_info); |
| } |
| |
| /* Implement the "clear_solib" target_so_ops method. */ |
| |
| static void |
| solib_aix_clear_solib (void) |
| { |
| /* Nothing needed. */ |
| } |
| |
| /* Compute and return the OBJFILE's section_offset array, using |
| the associated loader info (INFO). |
| |
| The resulting array is computed on the heap and must be |
| deallocated after use. */ |
| |
| static struct section_offsets * |
| solib_aix_get_section_offsets (struct objfile *objfile, |
| struct lm_info *info) |
| { |
| struct section_offsets *offsets; |
| bfd *abfd = objfile->obfd; |
| |
| offsets = XCNEWVEC (struct section_offsets, objfile->num_sections); |
| |
| /* .text */ |
| |
| if (objfile->sect_index_text != -1) |
| { |
| struct bfd_section *sect |
| = objfile->sections[objfile->sect_index_text].the_bfd_section; |
| |
| offsets->offsets[objfile->sect_index_text] |
| = info->text_addr + sect->filepos - bfd_section_vma (abfd, sect); |
| } |
| |
| /* .data */ |
| |
| if (objfile->sect_index_data != -1) |
| { |
| struct bfd_section *sect |
| = objfile->sections[objfile->sect_index_data].the_bfd_section; |
| |
| offsets->offsets[objfile->sect_index_data] |
| = info->data_addr - bfd_section_vma (abfd, sect); |
| } |
| |
| /* .bss |
| |
| The offset of the .bss section should be identical to the offset |
| of the .data section. If no .data section (which seems hard to |
| believe it is possible), assume it is zero. */ |
| |
| if (objfile->sect_index_bss != -1 |
| && objfile->sect_index_data != -1) |
| { |
| offsets->offsets[objfile->sect_index_bss] |
| = (offsets->offsets[objfile->sect_index_data] |
| + solib_aix_bss_data_overlap (abfd)); |
| } |
| |
| /* All other sections should not need relocation. */ |
| |
| return offsets; |
| } |
| |
| /* Implement the "solib_create_inferior_hook" target_so_ops method. */ |
| |
| static void |
| solib_aix_solib_create_inferior_hook (int from_tty) |
| { |
| const char *warning_msg = "unable to relocate main executable"; |
| VEC (lm_info_p) *library_list; |
| struct lm_info *exec_info; |
| |
| /* We need to relocate the main executable... */ |
| |
| library_list = solib_aix_get_library_list (current_inferior (), |
| warning_msg); |
| if (library_list == NULL) |
| return; /* Warning already printed. */ |
| |
| if (VEC_length (lm_info_p, library_list) < 1) |
| { |
| warning (_("unable to relocate main executable (no info from loader)")); |
| return; |
| } |
| |
| exec_info = VEC_index (lm_info_p, library_list, 0); |
| |
| if (symfile_objfile != NULL) |
| { |
| struct section_offsets *offsets |
| = solib_aix_get_section_offsets (symfile_objfile, exec_info); |
| struct cleanup *cleanup = make_cleanup (xfree, offsets); |
| |
| objfile_relocate (symfile_objfile, offsets); |
| do_cleanups (cleanup); |
| } |
| } |
| |
| /* Implement the "special_symbol_handling" target_so_ops method. */ |
| |
| static void |
| solib_aix_special_symbol_handling (void) |
| { |
| /* Nothing needed. */ |
| } |
| |
| /* Implement the "current_sos" target_so_ops method. */ |
| |
| static struct so_list * |
| solib_aix_current_sos (void) |
| { |
| struct so_list *start = NULL, *last = NULL; |
| VEC (lm_info_p) *library_list; |
| struct lm_info *info; |
| int ix; |
| |
| library_list = solib_aix_get_library_list (current_inferior (), NULL); |
| if (library_list == NULL) |
| return NULL; |
| |
| /* Build a struct so_list for each entry on the list. |
| We skip the first entry, since this is the entry corresponding |
| to the main executable, not a shared library. */ |
| for (ix = 1; VEC_iterate (lm_info_p, library_list, ix, info); ix++) |
| { |
| struct so_list *new_solib = XCNEW (struct so_list); |
| char *so_name; |
| |
| if (info->member_name == NULL) |
| { |
| /* INFO->FILENAME is probably not an archive, but rather |
| a shared object. Unusual, but it should be possible |
| to link a program against a shared object directory, |
| without having to put it in an archive first. */ |
| so_name = xstrdup (info->filename); |
| } |
| else |
| { |
| /* This is the usual case on AIX, where the shared object |
| is a member of an archive. Create a synthetic so_name |
| that follows the same convention as AIX's ldd tool |
| (Eg: "/lib/libc.a(shr.o)"). */ |
| so_name = xstrprintf ("%s(%s)", info->filename, info->member_name); |
| } |
| strncpy (new_solib->so_original_name, so_name, |
| SO_NAME_MAX_PATH_SIZE - 1); |
| new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; |
| memcpy (new_solib->so_name, new_solib->so_original_name, |
| SO_NAME_MAX_PATH_SIZE); |
| new_solib->lm_info = solib_aix_new_lm_info (info); |
| |
| /* Add it to the list. */ |
| if (!start) |
| last = start = new_solib; |
| else |
| { |
| last->next = new_solib; |
| last = new_solib; |
| } |
| } |
| |
| return start; |
| } |
| |
| /* Implement the "open_symbol_file_object" target_so_ops method. */ |
| |
| static int |
| solib_aix_open_symbol_file_object (void *from_ttyp) |
| { |
| return 0; |
| } |
| |
| /* Implement the "in_dynsym_resolve_code" target_so_ops method. */ |
| |
| static int |
| solib_aix_in_dynsym_resolve_code (CORE_ADDR pc) |
| { |
| return 0; |
| } |
| |
| /* Implement the "bfd_open" target_so_ops method. */ |
| |
| static bfd * |
| solib_aix_bfd_open (char *pathname) |
| { |
| /* The pathname is actually a synthetic filename with the following |
| form: "/path/to/sharedlib(member.o)" (double-quotes excluded). |
| split this into archive name and member name. |
| |
| FIXME: This is a little hacky. Perhaps we should provide access |
| to the solib's lm_info here? */ |
| const int path_len = strlen (pathname); |
| char *sep; |
| char *filename; |
| int filename_len; |
| char *member_name; |
| bfd *archive_bfd, *object_bfd; |
| struct cleanup *cleanup; |
| |
| if (pathname[path_len - 1] != ')') |
| return solib_bfd_open (pathname); |
| |
| /* Search for the associated parens. */ |
| sep = strrchr (pathname, '('); |
| if (sep == NULL) |
| { |
| /* Should never happen, but recover as best as we can (trying |
| to open pathname without decoding, possibly leading to |
| a failure), rather than triggering an assert failure). */ |
| warning (_("missing '(' in shared object pathname: %s"), pathname); |
| return solib_bfd_open (pathname); |
| } |
| filename_len = sep - pathname; |
| |
| filename = xstrprintf ("%.*s", filename_len, pathname); |
| cleanup = make_cleanup (xfree, filename); |
| member_name = xstrprintf ("%.*s", path_len - filename_len - 2, sep + 1); |
| make_cleanup (xfree, member_name); |
| |
| archive_bfd = gdb_bfd_open (filename, gnutarget, -1); |
| if (archive_bfd == NULL) |
| { |
| warning (_("Could not open `%s' as an executable file: %s"), |
| filename, bfd_errmsg (bfd_get_error ())); |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| if (bfd_check_format (archive_bfd, bfd_object)) |
| { |
| do_cleanups (cleanup); |
| return archive_bfd; |
| } |
| |
| if (! bfd_check_format (archive_bfd, bfd_archive)) |
| { |
| warning (_("\"%s\": not in executable format: %s."), |
| filename, bfd_errmsg (bfd_get_error ())); |
| gdb_bfd_unref (archive_bfd); |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| object_bfd = gdb_bfd_openr_next_archived_file (archive_bfd, NULL); |
| while (object_bfd != NULL) |
| { |
| bfd *next; |
| |
| if (strcmp (member_name, object_bfd->filename) == 0) |
| break; |
| |
| next = gdb_bfd_openr_next_archived_file (archive_bfd, object_bfd); |
| gdb_bfd_unref (object_bfd); |
| object_bfd = next; |
| } |
| |
| if (object_bfd == NULL) |
| { |
| warning (_("\"%s\": member \"%s\" missing."), filename, member_name); |
| gdb_bfd_unref (archive_bfd); |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| if (! bfd_check_format (object_bfd, bfd_object)) |
| { |
| warning (_("%s(%s): not in object format: %s."), |
| filename, member_name, bfd_errmsg (bfd_get_error ())); |
| gdb_bfd_unref (archive_bfd); |
| gdb_bfd_unref (object_bfd); |
| do_cleanups (cleanup); |
| return NULL; |
| } |
| |
| /* Override the returned bfd's name with our synthetic name in order |
| to allow commands listing all shared libraries to display that |
| synthetic name. Otherwise, we would only be displaying the name |
| of the archive member object. */ |
| xfree (bfd_get_filename (object_bfd)); |
| object_bfd->filename = xstrdup (pathname); |
| |
| gdb_bfd_unref (archive_bfd); |
| do_cleanups (cleanup); |
| return object_bfd; |
| } |
| |
| /* Return the obj_section corresponding to OBJFILE's data section, |
| or NULL if not found. */ |
| /* FIXME: Define in a more general location? */ |
| |
| static struct obj_section * |
| data_obj_section_from_objfile (struct objfile *objfile) |
| { |
| struct obj_section *osect; |
| |
| ALL_OBJFILE_OSECTIONS (objfile, osect) |
| if (strcmp (bfd_section_name (objfile->obfd, osect->the_bfd_section), |
| ".data") == 0) |
| return osect; |
| |
| return NULL; |
| } |
| |
| /* Return the TOC value corresponding to the given PC address, |
| or raise an error if the value could not be determined. */ |
| |
| CORE_ADDR |
| solib_aix_get_toc_value (CORE_ADDR pc) |
| { |
| struct obj_section *pc_osect = find_pc_section (pc); |
| struct obj_section *data_osect; |
| CORE_ADDR result; |
| |
| if (pc_osect == NULL) |
| error (_("unable to find TOC entry for pc %s " |
| "(no section contains this PC)"), |
| core_addr_to_string (pc)); |
| |
| data_osect = data_obj_section_from_objfile (pc_osect->objfile); |
| if (data_osect == NULL) |
| error (_("unable to find TOC entry for pc %s " |
| "(%s has no data section)"), |
| core_addr_to_string (pc), objfile_name (pc_osect->objfile)); |
| |
| result = (obj_section_addr (data_osect) |
| + xcoff_get_toc_offset (pc_osect->objfile)); |
| if (solib_aix_debug) |
| fprintf_unfiltered (gdb_stdlog, |
| "DEBUG: solib_aix_get_toc_value (pc=%s) -> %s\n", |
| core_addr_to_string (pc), |
| core_addr_to_string (result)); |
| |
| return result; |
| } |
| |
| /* This module's normal_stop observer. */ |
| |
| static void |
| solib_aix_normal_stop_observer (struct bpstats *unused_1, int unused_2) |
| { |
| struct solib_aix_inferior_data *data |
| = get_solib_aix_inferior_data (current_inferior ()); |
| |
| /* The inferior execution has been resumed, and it just stopped |
| again. This means that the list of shared libraries may have |
| evolved. Reset our cached value. */ |
| solib_aix_free_library_list (&data->library_list); |
| } |
| |
| /* Implements the "show debug aix-solib" command. */ |
| |
| static void |
| show_solib_aix_debug (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("solib-aix debugging is %s.\n"), value); |
| } |
| |
| /* The target_so_ops for AIX targets. */ |
| struct target_so_ops solib_aix_so_ops; |
| |
| /* -Wmissing-prototypes */ |
| extern initialize_file_ftype _initialize_solib_aix; |
| |
| void |
| _initialize_solib_aix (void) |
| { |
| solib_aix_so_ops.relocate_section_addresses |
| = solib_aix_relocate_section_addresses; |
| solib_aix_so_ops.free_so = solib_aix_free_so; |
| solib_aix_so_ops.clear_solib = solib_aix_clear_solib; |
| solib_aix_so_ops.solib_create_inferior_hook |
| = solib_aix_solib_create_inferior_hook; |
| solib_aix_so_ops.special_symbol_handling |
| = solib_aix_special_symbol_handling; |
| solib_aix_so_ops.current_sos = solib_aix_current_sos; |
| solib_aix_so_ops.open_symbol_file_object |
| = solib_aix_open_symbol_file_object; |
| solib_aix_so_ops.in_dynsym_resolve_code |
| = solib_aix_in_dynsym_resolve_code; |
| solib_aix_so_ops.bfd_open = solib_aix_bfd_open; |
| |
| solib_aix_inferior_data_handle = register_inferior_data (); |
| |
| observer_attach_normal_stop (solib_aix_normal_stop_observer); |
| |
| /* Debug this file's internals. */ |
| add_setshow_boolean_cmd ("aix-solib", class_maintenance, |
| &solib_aix_debug, _("\ |
| Control the debugging traces for the solib-aix module."), _("\ |
| Show whether solib-aix debugging traces are enabled."), _("\ |
| When on, solib-aix debugging traces are enabled."), |
| NULL, |
| show_solib_aix_debug, |
| &setdebuglist, &showdebuglist); |
| } |