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Diffstat (limited to 'gdb/solib-ia64-hpux.c')
| -rw-r--r-- | gdb/solib-ia64-hpux.c | 705 |
1 files changed, 0 insertions, 705 deletions
diff --git a/gdb/solib-ia64-hpux.c b/gdb/solib-ia64-hpux.c deleted file mode 100644 index b133c12..0000000 --- a/gdb/solib-ia64-hpux.c +++ /dev/null @@ -1,705 +0,0 @@ -/* Copyright (C) 2010-2015 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 "ia64-tdep.h" -#include "ia64-hpux-tdep.h" -#include "solib-ia64-hpux.h" -#include "solist.h" -#include "solib.h" -#include "target.h" -#include "gdbtypes.h" -#include "inferior.h" -#include "gdbcore.h" -#include "regcache.h" -#include "opcode/ia64.h" -#include "symfile.h" -#include "objfiles.h" -#include "elf-bfd.h" - -/* Need to define the following macro in order to get the complete - load_module_desc struct definition in dlfcn.h Otherwise, it doesn't - match the size of the struct the loader is providing us during load - events. */ -#define _LOAD_MODULE_DESC_EXT - -#include <sys/ttrace.h> -#include <dlfcn.h> -#include <elf.h> -#include <service_mgr.h> - -/* The following is to have access to the definition of type load_info_t. */ -#include <crt0.h> - -/* The r32 pseudo-register number. - - Like all stacked registers, r32 is treated as a pseudo-register, - because it is not always available for read/write via the ttrace - interface. */ -/* This is a bit of a hack, as we duplicate something hidden inside - ia64-tdep.c, but oh well... */ -#define IA64_R32_PSEUDO_REGNUM (IA64_NAT127_REGNUM + 2) - -/* Our struct so_list private data structure. */ - -struct lm_info -{ - /* The shared library module descriptor. We extract this structure - from the loader at the time the shared library gets mapped. */ - struct load_module_desc module_desc; - - /* The text segment address as defined in the shared library object - (this is not the address where this segment got loaded). This - field is initially set to zero, and computed lazily. */ - CORE_ADDR text_start; - - /* The data segment address as defined in the shared library object - (this is not the address where this segment got loaded). This - field is initially set to zero, and computed lazily. */ - CORE_ADDR data_start; -}; - -/* The list of shared libraries currently mapped by the inferior. */ - -static struct so_list *so_list_head = NULL; - -/* Create a new so_list element. The result should be deallocated - when no longer in use. */ - -static struct so_list * -new_so_list (char *so_name, struct load_module_desc module_desc) -{ - struct so_list *new_so; - - new_so = (struct so_list *) XCNEW (struct so_list); - new_so->lm_info = (struct lm_info *) XCNEW (struct lm_info); - new_so->lm_info->module_desc = module_desc; - - strncpy (new_so->so_name, so_name, SO_NAME_MAX_PATH_SIZE - 1); - new_so->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; - strcpy (new_so->so_original_name, new_so->so_name); - - return new_so; -} - -/* Return non-zero if the instruction at the current PC is a breakpoint - part of the dynamic loading process. - - We identify such instructions by checking that the instruction at - the current pc is a break insn where no software breakpoint has been - inserted by us. We also verify that the operands have specific - known values, to be extra certain. - - PTID is the ptid of the thread that should be checked, but this - function also assumes that inferior_ptid is already equal to PTID. - Ideally, we would like to avoid the requirement on inferior_ptid, - but many routines still use the inferior_ptid global to access - the relevant thread's register and memory. We still have the ptid - as parameter to be able to pass it to the routines that do take a ptid - - that way we avoid increasing explicit uses of the inferior_ptid - global. */ - -static int -ia64_hpux_at_dld_breakpoint_1_p (ptid_t ptid) -{ - struct regcache *regcache = get_thread_regcache (ptid); - CORE_ADDR pc = regcache_read_pc (regcache); - struct address_space *aspace = get_regcache_aspace (regcache); - ia64_insn t0, t1, slot[3], templ, insn; - int slotnum; - bfd_byte bundle[16]; - - /* If this is a regular breakpoint, then it can not be a dld one. */ - if (breakpoint_inserted_here_p (aspace, pc)) - return 0; - - slotnum = ((long) pc) & 0xf; - if (slotnum > 2) - internal_error (__FILE__, __LINE__, - "invalid slot (%d) for address %s", slotnum, - paddress (get_regcache_arch (regcache), pc)); - - pc -= (pc & 0xf); - read_memory (pc, bundle, sizeof (bundle)); - - /* bundles are always in little-endian byte order */ - t0 = bfd_getl64 (bundle); - t1 = bfd_getl64 (bundle + 8); - templ = (t0 >> 1) & 0xf; - slot[0] = (t0 >> 5) & 0x1ffffffffffLL; - slot[1] = ((t0 >> 46) & 0x3ffff) | ((t1 & 0x7fffff) << 18); - slot[2] = (t1 >> 23) & 0x1ffffffffffLL; - - if (templ == 2 && slotnum == 1) - { - /* skip L slot in MLI template: */ - slotnum = 2; - } - - insn = slot[slotnum]; - - return (insn == 0x1c0c9c0 /* break.i 0x070327 */ - || insn == 0x3c0c9c0); /* break.i 0x0f0327 */ -} - -/* Same as ia64_hpux_at_dld_breakpoint_1_p above, with the following - differences: It temporarily sets inferior_ptid to PTID, and also - contains any exception being raised. */ - -int -ia64_hpux_at_dld_breakpoint_p (ptid_t ptid) -{ - ptid_t saved_ptid = inferior_ptid; - int result = 0; - - inferior_ptid = ptid; - TRY - { - result = ia64_hpux_at_dld_breakpoint_1_p (ptid); - } - inferior_ptid = saved_ptid; - CATCH (e, RETURN_MASK_ALL) - { - warning (_("error while checking for dld breakpoint: %s"), e.message); - } - END_CATCH - - return result; -} - -/* Handler for library load event: Read the information provided by - the loader, and then use it to read the shared library symbols. */ - -static void -ia64_hpux_handle_load_event (struct regcache *regcache) -{ - CORE_ADDR module_desc_addr; - ULONGEST module_desc_size; - CORE_ADDR so_path_addr; - char so_path[PATH_MAX]; - struct load_module_desc module_desc; - struct so_list *new_so; - - /* Extract the data provided by the loader as follow: - - r33: Address of load_module_desc structure - - r34: size of struct load_module_desc - - r35: Address of string holding shared library path - */ - regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 1, - &module_desc_addr); - regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 2, - &module_desc_size); - regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM + 3, - &so_path_addr); - - if (module_desc_size != sizeof (struct load_module_desc)) - warning (_("load_module_desc size (%ld) != size returned by kernel (%s)"), - sizeof (struct load_module_desc), - pulongest (module_desc_size)); - - read_memory_string (so_path_addr, so_path, PATH_MAX); - read_memory (module_desc_addr, (gdb_byte *) &module_desc, - sizeof (module_desc)); - - /* Create a new so_list element and insert it at the start of our - so_list_head (we insert at the start of the list only because - it is less work compared to inserting it elsewhere). */ - new_so = new_so_list (so_path, module_desc); - new_so->next = so_list_head; - so_list_head = new_so; -} - -/* Update the value of the PC to point to the begining of the next - instruction bundle. */ - -static void -ia64_hpux_move_pc_to_next_bundle (struct regcache *regcache) -{ - CORE_ADDR pc = regcache_read_pc (regcache); - - pc -= pc & 0xf; - pc += 16; - ia64_write_pc (regcache, pc); -} - -/* Handle loader events. - - PTID is the ptid of the thread corresponding to the event being - handled. Similarly to ia64_hpux_at_dld_breakpoint_1_p, this - function assumes that inferior_ptid is set to PTID. */ - -static void -ia64_hpux_handle_dld_breakpoint_1 (ptid_t ptid) -{ - struct regcache *regcache = get_thread_regcache (ptid); - ULONGEST arg0; - - /* The type of event is provided by the loaded via r32. */ - regcache_cooked_read_unsigned (regcache, IA64_R32_PSEUDO_REGNUM, &arg0); - switch (arg0) - { - case BREAK_DE_SVC_LOADED: - /* Currently, the only service loads are uld and dld, - so we shouldn't need to do anything. Just ignore. */ - break; - case BREAK_DE_LIB_LOADED: - ia64_hpux_handle_load_event (regcache); - solib_add (NULL, 0, ¤t_target, auto_solib_add); - break; - case BREAK_DE_LIB_UNLOADED: - case BREAK_DE_LOAD_COMPLETE: - case BREAK_DE_BOR: - /* Ignore for now. */ - break; - } - - /* Now that we have handled the event, we can move the PC to - the next instruction bundle, past the break instruction. */ - ia64_hpux_move_pc_to_next_bundle (regcache); -} - -/* Same as ia64_hpux_handle_dld_breakpoint_1 above, with the following - differences: This function temporarily sets inferior_ptid to PTID, - and also contains any exception. */ - -void -ia64_hpux_handle_dld_breakpoint (ptid_t ptid) -{ - ptid_t saved_ptid = inferior_ptid; - - inferior_ptid = ptid; - TRY - { - ia64_hpux_handle_dld_breakpoint_1 (ptid); - } - inferior_ptid = saved_ptid; - CATCH (e, RETURN_MASK_ALL) - { - warning (_("error detected while handling dld breakpoint: %s"), e.message); - } - END_CATCH -} - -/* Find the address of the code and data segments in ABFD, and update - TEXT_START and DATA_START accordingly. */ - -static void -ia64_hpux_find_start_vma (bfd *abfd, CORE_ADDR *text_start, - CORE_ADDR *data_start) -{ - Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); - Elf64_Phdr phdr; - int i; - - *text_start = 0; - *data_start = 0; - - if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) - error (_("invalid program header offset in %s"), abfd->filename); - - for (i = 0; i < i_ehdrp->e_phnum; i++) - { - if (bfd_bread (&phdr, sizeof (phdr), abfd) != sizeof (phdr)) - error (_("failed to read segment %d in %s"), i, abfd->filename); - - if (phdr.p_flags & PF_X - && (*text_start == 0 || phdr.p_vaddr < *text_start)) - *text_start = phdr.p_vaddr; - - if (phdr.p_flags & PF_W - && (*data_start == 0 || phdr.p_vaddr < *data_start)) - *data_start = phdr.p_vaddr; - } -} - -/* The "relocate_section_addresses" target_so_ops routine for ia64-hpux. */ - -static void -ia64_hpux_relocate_section_addresses (struct so_list *so, - struct target_section *sec) -{ - CORE_ADDR offset = 0; - - /* If we haven't computed the text & data segment addresses, do so now. - We do this here, because we now have direct access to the associated - bfd, whereas we would have had to open our own if we wanted to do it - while processing the library-load event. */ - if (so->lm_info->text_start == 0 && so->lm_info->data_start == 0) - ia64_hpux_find_start_vma (sec->the_bfd_section->owner, - &so->lm_info->text_start, - &so->lm_info->data_start); - - /* Determine the relocation offset based on which segment - the section belongs to. */ - if ((so->lm_info->text_start < so->lm_info->data_start - && sec->addr < so->lm_info->data_start) - || (so->lm_info->text_start > so->lm_info->data_start - && sec->addr >= so->lm_info->text_start)) - offset = so->lm_info->module_desc.text_base - so->lm_info->text_start; - else if ((so->lm_info->text_start < so->lm_info->data_start - && sec->addr >= so->lm_info->data_start) - || (so->lm_info->text_start > so->lm_info->data_start - && sec->addr < so->lm_info->text_start)) - offset = so->lm_info->module_desc.data_base - so->lm_info->data_start; - - /* And now apply the relocation. */ - sec->addr += offset; - sec->endaddr += offset; - - /* Best effort to set addr_high/addr_low. This is used only by - 'info sharedlibrary'. */ - if (so->addr_low == 0 || sec->addr < so->addr_low) - so->addr_low = sec->addr; - - if (so->addr_high == 0 || sec->endaddr > so->addr_high) - so->addr_high = sec->endaddr; -} - -/* The "free_so" target_so_ops routine for ia64-hpux. */ - -static void -ia64_hpux_free_so (struct so_list *so) -{ - xfree (so->lm_info); -} - -/* The "clear_solib" target_so_ops routine for ia64-hpux. */ - -static void -ia64_hpux_clear_solib (void) -{ - struct so_list *so; - - while (so_list_head != NULL) - { - so = so_list_head; - so_list_head = so_list_head->next; - - ia64_hpux_free_so (so); - xfree (so); - } -} - -/* Assuming the inferior just stopped on an EXEC event, return - the address of the load_info_t structure. */ - -static CORE_ADDR -ia64_hpux_get_load_info_addr (void) -{ - struct type *data_ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; - CORE_ADDR addr; - int status; - - /* The address of the load_info_t structure is stored in the 4th - argument passed to the initial thread of the process (in other - words, in argv[3]). So get the address of these arguments, - and extract the 4th one. */ - status = ttrace (TT_PROC_GET_ARGS, ptid_get_pid (inferior_ptid), - 0, (uintptr_t) &addr, sizeof (CORE_ADDR), 0); - if (status == -1 && errno) - perror_with_name (_("Unable to get argument list")); - return (read_memory_typed_address (addr + 3 * 8, data_ptr_type)); -} - -/* A structure used to aggregate some information extracted from - the dynamic section of the main executable. */ - -struct dld_info -{ - ULONGEST dld_flags; - CORE_ADDR load_map; -}; - -/* Scan the ".dynamic" section referenced by ABFD and DYN_SECT, - and extract the information needed to fill in INFO. */ - -static void -ia64_hpux_read_dynamic_info (struct gdbarch *gdbarch, bfd *abfd, - asection *dyn_sect, struct dld_info *info) -{ - int sect_size; - char *buf; - char *buf_end; - - /* Make sure that info always has initialized data, even if we fail - to read the syn_sect section. */ - memset (info, 0, sizeof (struct dld_info)); - - sect_size = bfd_section_size (abfd, dyn_sect); - buf = alloca (sect_size); - buf_end = buf + sect_size; - - if (bfd_seek (abfd, dyn_sect->filepos, SEEK_SET) != 0 - || bfd_bread (buf, sect_size, abfd) != sect_size) - error (_("failed to read contents of .dynamic section")); - - for (; buf < buf_end; buf += sizeof (Elf64_Dyn)) - { - Elf64_Dyn *dynp = (Elf64_Dyn *) buf; - Elf64_Sxword d_tag; - - d_tag = bfd_h_get_64 (abfd, &dynp->d_tag); - switch (d_tag) - { - case DT_HP_DLD_FLAGS: - info->dld_flags = bfd_h_get_64 (abfd, &dynp->d_un); - break; - - case DT_HP_LOAD_MAP: - { - CORE_ADDR load_map_addr = bfd_h_get_64 (abfd, &dynp->d_un.d_ptr); - - if (target_read_memory (load_map_addr, - (gdb_byte *) &info->load_map, - sizeof (info->load_map)) != 0) - error (_("failed to read load map at %s"), - paddress (gdbarch, load_map_addr)); - } - break; - } - } -} - -/* Wrapper around target_read_memory used with libdl. */ - -static void * -ia64_hpux_read_tgt_mem (void *buffer, uint64_t ptr, size_t bufsiz, int ident) -{ - if (target_read_memory (ptr, (gdb_byte *) buffer, bufsiz) != 0) - return 0; - else - return buffer; -} - -/* Create a new so_list object for a shared library, and store that - new so_list object in our SO_LIST_HEAD list. - - SO_INDEX is an index specifying the placement of the loaded shared - library in the dynamic loader's search list. Normally, this index - is strictly positive, but an index of -1 refers to the loader itself. - - Return nonzero if the so_list object could be created. A null - return value with a positive SO_INDEX normally means that there are - no more entries in the dynamic loader's search list at SO_INDEX or - beyond. */ - -static int -ia64_hpux_add_so_from_dld_info (struct dld_info info, int so_index) -{ - struct load_module_desc module_desc; - uint64_t so_handle; - char *so_path; - struct so_list *so; - - so_handle = dlgetmodinfo (so_index, &module_desc, sizeof (module_desc), - ia64_hpux_read_tgt_mem, 0, info.load_map); - - if (so_handle == 0) - /* No such entry. We probably reached the end of the list. */ - return 0; - - so_path = dlgetname (&module_desc, sizeof (module_desc), - ia64_hpux_read_tgt_mem, 0, info.load_map); - if (so_path == NULL) - { - /* Should never happen, but let's not crash if it does. */ - warning (_("unable to get shared library name, symbols not loaded")); - return 0; - } - - /* Create a new so_list and insert it at the start of our list. - The order is not extremely important, but it's less work to do so - at the end of the list. */ - so = new_so_list (so_path, module_desc); - so->next = so_list_head; - so_list_head = so; - - return 1; -} - -/* Assuming we just attached to a process, update our list of shared - libraries (SO_LIST_HEAD) as well as GDB's list. */ - -static void -ia64_hpux_solib_add_after_attach (void) -{ - bfd *abfd; - asection *dyn_sect; - struct dld_info info; - int i; - - if (symfile_objfile == NULL) - return; - - abfd = symfile_objfile->obfd; - dyn_sect = bfd_get_section_by_name (abfd, ".dynamic"); - - if (dyn_sect == NULL || bfd_section_size (abfd, dyn_sect) == 0) - return; - - ia64_hpux_read_dynamic_info (get_objfile_arch (symfile_objfile), abfd, - dyn_sect, &info); - - if ((info.dld_flags & DT_HP_DEBUG_PRIVATE) == 0) - { - warning (_( -"The shared libraries were not privately mapped; setting a breakpoint\n\ -in a shared library will not work until you rerun the program.\n\ -Use the following command to enable debugging of shared libraries.\n\ -chatr +dbg enable a.out")); - } - - /* Read the symbols of the dynamic loader (dld.so). */ - ia64_hpux_add_so_from_dld_info (info, -1); - - /* Read the symbols of all the other shared libraries. */ - for (i = 1; ; i++) - if (!ia64_hpux_add_so_from_dld_info (info, i)) - break; /* End of list. */ - - /* Resync the library list at the core level. */ - solib_add (NULL, 1, ¤t_target, auto_solib_add); -} - -/* The "create_inferior_hook" target_so_ops routine for ia64-hpux. */ - -static void -ia64_hpux_solib_create_inferior_hook (int from_tty) -{ - CORE_ADDR load_info_addr; - load_info_t load_info; - - /* Initially, we were thinking about adding a check that the program - (accessible through symfile_objfile) was linked against some shared - libraries, by searching for a ".dynamic" section. However, could - this break in the case of a statically linked program that later - uses dlopen? Programs that are fully statically linked are very - rare, and we will worry about them when we encounter one that - causes trouble. */ - - /* Set the LI_TRACE flag in the load_info_t structure. This enables - notifications when shared libraries are being mapped. */ - load_info_addr = ia64_hpux_get_load_info_addr (); - read_memory (load_info_addr, (gdb_byte *) &load_info, sizeof (load_info)); - load_info.li_flags |= LI_TRACE; - write_memory (load_info_addr, (gdb_byte *) &load_info, sizeof (load_info)); - - /* If we just attached to our process, some shard libraries have - already been mapped. Find which ones they are... */ - if (current_inferior ()->attach_flag) - ia64_hpux_solib_add_after_attach (); -} - -/* The "special_symbol_handling" target_so_ops routine for ia64-hpux. */ - -static void -ia64_hpux_special_symbol_handling (void) -{ - /* Nothing to do. */ -} - -/* The "current_sos" target_so_ops routine for ia64-hpux. */ - -static struct so_list * -ia64_hpux_current_sos (void) -{ - /* Return a deep copy of our own list. */ - struct so_list *new_head = NULL, *prev_new_so = NULL; - struct so_list *our_so; - - for (our_so = so_list_head; our_so != NULL; our_so = our_so->next) - { - struct so_list *new_so; - - new_so = new_so_list (our_so->so_name, our_so->lm_info->module_desc); - if (prev_new_so != NULL) - prev_new_so->next = new_so; - prev_new_so = new_so; - if (new_head == NULL) - new_head = new_so; - } - - return new_head; -} - -/* The "open_symbol_file_object" target_so_ops routine for ia64-hpux. */ - -static int -ia64_hpux_open_symbol_file_object (void *from_ttyp) -{ - return 0; -} - -/* The "in_dynsym_resolve_code" target_so_ops routine for ia64-hpux. */ - -static int -ia64_hpux_in_dynsym_resolve_code (CORE_ADDR pc) -{ - return 0; -} - -/* If FADDR is the address of a function inside one of the shared - libraries, return the shared library linkage address. */ - -CORE_ADDR -ia64_hpux_get_solib_linkage_addr (CORE_ADDR faddr) -{ - struct so_list *so = so_list_head; - - while (so != NULL) - { - struct load_module_desc module_desc = so->lm_info->module_desc; - - if (module_desc.text_base <= faddr - && (module_desc.text_base + module_desc.text_size) > faddr) - return module_desc.linkage_ptr; - - so = so->next; - } - - return 0; -} - -/* Create a new target_so_ops structure suitable for ia64-hpux, and - return its address. */ - -static struct target_so_ops * -ia64_hpux_target_so_ops (void) -{ - struct target_so_ops *ops = XCNEW (struct target_so_ops); - - ops->relocate_section_addresses = ia64_hpux_relocate_section_addresses; - ops->free_so = ia64_hpux_free_so; - ops->clear_solib = ia64_hpux_clear_solib; - ops->solib_create_inferior_hook = ia64_hpux_solib_create_inferior_hook; - ops->special_symbol_handling = ia64_hpux_special_symbol_handling; - ops->current_sos = ia64_hpux_current_sos; - ops->open_symbol_file_object = ia64_hpux_open_symbol_file_object; - ops->in_dynsym_resolve_code = ia64_hpux_in_dynsym_resolve_code; - ops->bfd_open = solib_bfd_open; - - return ops; -} - -/* Prevent warning from -Wmissing-prototypes. */ -void _initialize_solib_ia64_hpux (void); - -void -_initialize_solib_ia64_hpux (void) -{ - ia64_hpux_so_ops = ia64_hpux_target_so_ops (); -} |