| /* Handle HP SOM shared libraries for GDB, the GNU Debugger. |
| |
| Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, |
| 2003 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. |
| |
| Written by the Center for Software Science at the Univerity of Utah |
| and by Cygnus Support. */ |
| |
| |
| #include "defs.h" |
| |
| #include "frame.h" |
| #include "bfd.h" |
| #include "som.h" |
| #include "libhppa.h" |
| #include "gdbcore.h" |
| #include "symtab.h" |
| #include "breakpoint.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "inferior.h" |
| #include "gdb-stabs.h" |
| #include "gdb_stat.h" |
| #include "gdbcmd.h" |
| #include "language.h" |
| #include "regcache.h" |
| |
| #include <fcntl.h> |
| |
| #ifndef O_BINARY |
| #define O_BINARY 0 |
| #endif |
| |
| /* Uncomment this to turn on some debugging output. |
| */ |
| |
| /* #define SOLIB_DEBUG |
| */ |
| |
| /* Defined in exec.c; used to prevent dangling pointer bug. |
| */ |
| extern struct target_ops exec_ops; |
| |
| /* This lives in hppa-tdep.c. */ |
| extern struct unwind_table_entry *find_unwind_entry (CORE_ADDR pc); |
| |
| /* These ought to be defined in some public interface, but aren't. They |
| define the meaning of the various bits in the distinguished __dld_flags |
| variable that is declared in every debuggable a.out on HP-UX, and that |
| is shared between the debugger and the dynamic linker. |
| */ |
| #define DLD_FLAGS_MAPPRIVATE 0x1 |
| #define DLD_FLAGS_HOOKVALID 0x2 |
| #define DLD_FLAGS_LISTVALID 0x4 |
| #define DLD_FLAGS_BOR_ENABLE 0x8 |
| |
| /* TODO: |
| |
| * Most of this code should work for hp300 shared libraries. Does |
| anyone care enough to weed out any SOM-isms. |
| |
| * Support for hpux8 dynamic linker. */ |
| |
| /* The basic structure which describes a dynamically loaded object. This |
| data structure is private to the dynamic linker and isn't found in |
| any HPUX include file. */ |
| |
| struct som_solib_mapped_entry |
| { |
| /* The name of the library. */ |
| char *name; |
| |
| /* Version of this structure (it is expected to change again in hpux10). */ |
| unsigned char struct_version; |
| |
| /* Binding mode for this library. */ |
| unsigned char bind_mode; |
| |
| /* Version of this library. */ |
| short library_version; |
| |
| /* Start of text address, |
| * link-time text location (length of text area), |
| * end of text address. */ |
| CORE_ADDR text_addr; |
| CORE_ADDR text_link_addr; |
| CORE_ADDR text_end; |
| |
| /* Start of data, start of bss and end of data. */ |
| CORE_ADDR data_start; |
| CORE_ADDR bss_start; |
| CORE_ADDR data_end; |
| |
| /* Value of linkage pointer (%r19). */ |
| CORE_ADDR got_value; |
| |
| /* Next entry. */ |
| struct som_solib_mapped_entry *next; |
| |
| /* There are other fields, but I don't have information as to what is |
| contained in them. */ |
| |
| /* For versions from HPUX-10.30 and up */ |
| |
| /* Address in target of offset from thread-local register of |
| * start of this thread's data. I.e., the first thread-local |
| * variable in this shared library starts at *(tsd_start_addr) |
| * from that area pointed to by cr27 (mpsfu_hi). |
| * |
| * We do the indirection as soon as we read it, so from then |
| * on it's the offset itself. |
| */ |
| CORE_ADDR tsd_start_addr; |
| |
| /* Following this are longwords holding: |
| |
| * ?, ?, ?, ptr to -1, ptr to-1, ptr to lib name (leaf name), |
| * ptr to __data_start, ptr to __data_end |
| */ |
| |
| |
| }; |
| |
| /* A structure to keep track of all the known shared objects. */ |
| struct so_list |
| { |
| struct som_solib_mapped_entry som_solib; |
| struct objfile *objfile; |
| bfd *abfd; |
| struct section_table *sections; |
| struct section_table *sections_end; |
| /* elz: added this field to store the address in target space (in the |
| library) of the library descriptor (handle) which we read into |
| som_solib_mapped_entry structure */ |
| CORE_ADDR solib_addr; |
| struct so_list *next; |
| |
| }; |
| |
| static struct so_list *so_list_head; |
| |
| |
| /* This is the cumulative size in bytes of the symbol tables of all |
| shared objects on the so_list_head list. (When we say size, here |
| we mean of the information before it is brought into memory and |
| potentially expanded by GDB.) When adding a new shlib, this value |
| is compared against the threshold size, held by auto_solib_limit |
| (in megabytes). If adding symbols for the new shlib would cause |
| the total size to exceed the threshold, then the new shlib's |
| symbols are not loaded. */ |
| static LONGEST som_solib_total_st_size; |
| |
| /* When the threshold is reached for any shlib, we refuse to add |
| symbols for subsequent shlibs, even if those shlibs' symbols would |
| be small enough to fit under the threshold. (Although this may |
| result in one, early large shlib preventing the loading of later, |
| smalller shlibs' symbols, it allows us to issue one informational |
| message. The alternative, to issue a message for each shlib whose |
| symbols aren't loaded, could be a big annoyance where the threshold |
| is exceeded due to a very large number of shlibs.) |
| */ |
| static int som_solib_st_size_threshold_exceeded; |
| |
| /* These addresses should be filled in by som_solib_create_inferior_hook. |
| They are also used elsewhere in this module. |
| */ |
| typedef struct |
| { |
| CORE_ADDR address; |
| struct unwind_table_entry *unwind; |
| } |
| addr_and_unwind_t; |
| |
| /* When adding fields, be sure to clear them in _initialize_som_solib. */ |
| static struct |
| { |
| int is_valid; |
| addr_and_unwind_t hook; |
| addr_and_unwind_t hook_stub; |
| addr_and_unwind_t load; |
| addr_and_unwind_t load_stub; |
| addr_and_unwind_t unload; |
| addr_and_unwind_t unload2; |
| addr_and_unwind_t unload_stub; |
| } |
| dld_cache; |
| |
| |
| |
| static void som_sharedlibrary_info_command (char *, int); |
| |
| static void som_solib_sharedlibrary_command (char *, int); |
| |
| static LONGEST |
| som_solib_sizeof_symbol_table (char *filename) |
| { |
| bfd *abfd; |
| int desc; |
| char *absolute_name; |
| LONGEST st_size = (LONGEST) 0; |
| asection *sect; |
| |
| /* We believe that filename was handed to us by the dynamic linker, and |
| is therefore always an absolute path. |
| */ |
| desc = openp (getenv ("PATH"), 1, filename, O_RDONLY | O_BINARY, 0, &absolute_name); |
| if (desc < 0) |
| { |
| perror_with_name (filename); |
| } |
| filename = absolute_name; |
| |
| abfd = bfd_fdopenr (filename, gnutarget, desc); |
| if (!abfd) |
| { |
| close (desc); |
| make_cleanup (xfree, filename); |
| error ("\"%s\": can't open to read symbols: %s.", filename, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| |
| if (!bfd_check_format (abfd, bfd_object)) /* Reads in section info */ |
| { |
| bfd_close (abfd); /* This also closes desc */ |
| make_cleanup (xfree, filename); |
| error ("\"%s\": can't read symbols: %s.", filename, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| |
| /* Sum the sizes of the various sections that compose debug info. */ |
| |
| /* This contains non-DOC information. */ |
| sect = bfd_get_section_by_name (abfd, "$DEBUG$"); |
| if (sect) |
| st_size += (LONGEST) bfd_section_size (abfd, sect); |
| |
| /* This contains DOC information. */ |
| sect = bfd_get_section_by_name (abfd, "$PINFO$"); |
| if (sect) |
| st_size += (LONGEST) bfd_section_size (abfd, sect); |
| |
| bfd_close (abfd); /* This also closes desc */ |
| xfree (filename); |
| |
| /* Unfortunately, just summing the sizes of various debug info |
| sections isn't a very accurate measurement of how much heap |
| space the debugger will need to hold them. It also doesn't |
| account for space needed by linker (aka "minimal") symbols. |
| |
| Anecdotal evidence suggests that just summing the sizes of |
| debug-info-related sections understates the heap space needed |
| to represent it internally by about an order of magnitude. |
| |
| Since it's not exactly brain surgery we're doing here, rather |
| than attempt to more accurately measure the size of a shlib's |
| symbol table in GDB's heap, we'll just apply a 10x fudge- |
| factor to the debug info sections' size-sum. No, this doesn't |
| account for minimal symbols in non-debuggable shlibs. But it |
| all roughly washes out in the end. |
| */ |
| return st_size * (LONGEST) 10; |
| } |
| |
| |
| static void |
| som_solib_add_solib_objfile (struct so_list *so, char *name, int from_tty, |
| CORE_ADDR text_addr) |
| { |
| obj_private_data_t *obj_private; |
| struct obj_section *s; |
| |
| so->objfile = symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED); |
| so->abfd = so->objfile->obfd; |
| |
| /* syms_from_objfile has bizarre section offset code, |
| so I do my own right here. */ |
| for (s = so->objfile->sections; s < so->objfile->sections_end; s++) |
| { |
| flagword aflag = bfd_get_section_flags(so->abfd, s->the_bfd_section); |
| if (aflag & SEC_CODE) |
| { |
| s->addr += so->som_solib.text_addr - so->som_solib.text_link_addr; |
| s->endaddr += so->som_solib.text_addr - so->som_solib.text_link_addr; |
| } |
| else if (aflag & SEC_DATA) |
| { |
| s->addr += so->som_solib.data_start; |
| s->endaddr += so->som_solib.data_start; |
| } |
| else |
| ; |
| } |
| |
| /* Mark this as a shared library and save private data. |
| */ |
| so->objfile->flags |= OBJF_SHARED; |
| |
| if (so->objfile->obj_private == NULL) |
| { |
| obj_private = (obj_private_data_t *) |
| obstack_alloc (&so->objfile->psymbol_obstack, |
| sizeof (obj_private_data_t)); |
| obj_private->unwind_info = NULL; |
| obj_private->so_info = NULL; |
| so->objfile->obj_private = obj_private; |
| } |
| |
| obj_private = (obj_private_data_t *) so->objfile->obj_private; |
| obj_private->so_info = so; |
| |
| if (!bfd_check_format (so->abfd, bfd_object)) |
| { |
| error ("\"%s\": not in executable format: %s.", |
| name, bfd_errmsg (bfd_get_error ())); |
| } |
| } |
| |
| |
| static void |
| som_solib_load_symbols (struct so_list *so, char *name, int from_tty, |
| CORE_ADDR text_addr, struct target_ops *target) |
| { |
| struct section_table *p; |
| int status; |
| char buf[4]; |
| CORE_ADDR presumed_data_start; |
| |
| #ifdef SOLIB_DEBUG |
| printf ("--Adding symbols for shared library \"%s\"\n", name); |
| #endif |
| |
| som_solib_add_solib_objfile (so, name, from_tty, text_addr); |
| |
| /* Now we need to build a section table for this library since |
| we might be debugging a core file from a dynamically linked |
| executable in which the libraries were not privately mapped. */ |
| if (build_section_table (so->abfd, |
| &so->sections, |
| &so->sections_end)) |
| { |
| error ("Unable to build section table for shared library\n."); |
| return; |
| } |
| |
| /* Relocate all the sections based on where they got loaded. */ |
| for (p = so->sections; p < so->sections_end; p++) |
| { |
| if (p->the_bfd_section->flags & SEC_CODE) |
| { |
| p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile)); |
| p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile)); |
| } |
| else if (p->the_bfd_section->flags & SEC_DATA) |
| { |
| p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile)); |
| p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile)); |
| } |
| } |
| |
| /* Now see if we need to map in the text and data for this shared |
| library (for example debugging a core file which does not use |
| private shared libraries.). |
| |
| Carefully peek at the first text address in the library. If the |
| read succeeds, then the libraries were privately mapped and were |
| included in the core dump file. |
| |
| If the peek failed, then the libraries were not privately mapped |
| and are not in the core file, we'll have to read them in ourselves. */ |
| status = target_read_memory (text_addr, buf, 4); |
| if (status != 0) |
| { |
| int old, new; |
| |
| new = so->sections_end - so->sections; |
| |
| old = target_resize_to_sections (target, new); |
| |
| /* Copy over the old data before it gets clobbered. */ |
| memcpy ((char *) (target->to_sections + old), |
| so->sections, |
| ((sizeof (struct section_table)) * new)); |
| } |
| } |
| |
| |
| /* FIXME: cagney/2003-02-01: This just isn't right. Given an address |
| within the target's address space, this converts the value into an |
| address within the host's (i.e., GDB's) address space. Given that |
| the host/target address spaces are separate, this can't be right. */ |
| |
| static void * |
| hpux_address_to_host_pointer_hack (CORE_ADDR addr) |
| { |
| void *ptr; |
| |
| gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); |
| ADDRESS_TO_POINTER (builtin_type_void_data_ptr, &ptr, addr); |
| return ptr; |
| } |
| |
| /* Add symbols from shared libraries into the symtab list, unless the |
| size threshold specified by auto_solib_limit (in megabytes) would |
| be exceeded. */ |
| |
| void |
| som_solib_add (char *arg_string, int from_tty, struct target_ops *target, int readsyms) |
| { |
| struct minimal_symbol *msymbol; |
| struct so_list *so_list_tail; |
| CORE_ADDR addr; |
| asection *shlib_info; |
| int status; |
| unsigned int dld_flags; |
| char buf[4], *re_err; |
| int threshold_warning_given = 0; |
| |
| /* First validate our arguments. */ |
| re_err = re_comp (arg_string ? arg_string : "."); |
| if (re_err != NULL) |
| { |
| error ("Invalid regexp: %s", re_err); |
| } |
| |
| /* If we're debugging a core file, or have attached to a running |
| process, then som_solib_create_inferior_hook will not have been |
| called. |
| |
| We need to first determine if we're dealing with a dynamically |
| linked executable. If not, then return without an error or warning. |
| |
| We also need to examine __dld_flags to determine if the shared library |
| list is valid and to determine if the libraries have been privately |
| mapped. */ |
| 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; |
| |
| msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
| if (msymbol == NULL) |
| { |
| error ("Unable to find __dld_flags symbol in object file.\n"); |
| return; |
| } |
| |
| addr = SYMBOL_VALUE_ADDRESS (msymbol); |
| /* Read the current contents. */ |
| status = target_read_memory (addr, buf, 4); |
| if (status != 0) |
| { |
| error ("Unable to read __dld_flags\n"); |
| return; |
| } |
| dld_flags = extract_unsigned_integer (buf, 4); |
| |
| /* __dld_list may not be valid. If not, then we punt, warning the user if |
| we were called as a result of the add-symfile command. |
| */ |
| if ((dld_flags & DLD_FLAGS_LISTVALID) == 0) |
| { |
| if (from_tty) |
| error ("__dld_list is not valid according to __dld_flags.\n"); |
| return; |
| } |
| |
| /* If the libraries were not mapped private, warn the user. */ |
| if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0) |
| warning ("The shared libraries were not privately mapped; setting a\nbreakpoint in a shared library will not work until you rerun the program.\n"); |
| |
| msymbol = lookup_minimal_symbol ("__dld_list", NULL, NULL); |
| if (!msymbol) |
| { |
| /* Older crt0.o files (hpux8) don't have __dld_list as a symbol, |
| but the data is still available if you know where to look. */ |
| msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
| if (!msymbol) |
| { |
| error ("Unable to find dynamic library list.\n"); |
| return; |
| } |
| addr = SYMBOL_VALUE_ADDRESS (msymbol) - 8; |
| } |
| else |
| addr = SYMBOL_VALUE_ADDRESS (msymbol); |
| |
| status = target_read_memory (addr, buf, 4); |
| if (status != 0) |
| { |
| error ("Unable to find dynamic library list.\n"); |
| return; |
| } |
| |
| addr = extract_unsigned_integer (buf, 4); |
| |
| /* If addr is zero, then we're using an old dynamic loader which |
| doesn't maintain __dld_list. We'll have to use a completely |
| different approach to get shared library information. */ |
| if (addr == 0) |
| goto old_dld; |
| |
| /* 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; |
| |
| /* FIXME: cagney/2003-02-01: I think som_solib.next should be a |
| CORE_ADDR. */ |
| new_so->som_solib.next = |
| hpux_address_to_host_pointer_hack (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 (DEPRECATED_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; |
| } |