345 lines
9.4 KiB
C
345 lines
9.4 KiB
C
/* Copyright (C) 1990 Free Software Foundation, Inc.
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This file is part of GDB.
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GDB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GDB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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** symbol definitions
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*/
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#include <sys/types.h>
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#include <string.h>
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#include <link.h>
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#include <sys/param.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include "defs.h"
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#include "param.h"
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#include "symtab.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "target.h"
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#include "frame.h"
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/*
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** local data declarations
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*/
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#define MAX_PATH_SIZE 256
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struct so_list {
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struct link_map inferior_lm; /* inferior link map */
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struct link_map *inferior_lm_add;
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long ld_text;
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char inferior_so_name[MAX_PATH_SIZE]; /* Shared Object Library Name */
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struct so_list *next; /* Next Structure */
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int symbols_loaded;
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bfd *so_bfd;
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struct section_table *so_sections;
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struct section_table *so_sections_end;
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};
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static struct so_list *so_list_head = 0;
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/*
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** Build a section map for a shared library, record its text size in
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** the so_list structure and set up the text section of the shared lib.
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*/
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static void
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solib_map_sections(so)
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struct so_list *so;
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{
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char *filename;
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char *scratch_pathname;
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int scratch_chan;
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struct section_table *p;
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filename = tilde_expand (so->inferior_so_name);
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make_cleanup (free, filename);
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scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
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&scratch_pathname);
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if (scratch_chan < 0)
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scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, O_RDONLY, 0,
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&scratch_pathname);
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if (scratch_chan < 0)
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perror_with_name (filename);
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so->so_bfd = bfd_fdopenr (scratch_pathname, NULL, scratch_chan);
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if (!so->so_bfd)
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error ("Could not open `%s' as an executable file: %s",
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scratch_pathname, bfd_errmsg (bfd_error));
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if (!bfd_check_format (so->so_bfd, bfd_object))
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error ("\"%s\": not in executable format: %s.",
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scratch_pathname, bfd_errmsg (bfd_error));
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if (build_section_table (so->so_bfd, &so->so_sections, &so->so_sections_end))
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error ("Can't find the file sections in `%s': %s",
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exec_bfd->filename, bfd_errmsg (bfd_error));
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for (p = so->so_sections; p < so->so_sections_end; p++)
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{
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if (strcmp (bfd_section_name (so->so_bfd, p->sec_ptr), ".text") == 0)
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{
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/* Determine length of text section and relocate it. */
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so->ld_text = p->endaddr - p->addr;
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p->addr += (CORE_ADDR)so->inferior_lm.lm_addr;
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p->endaddr += (CORE_ADDR)so->inferior_lm.lm_addr;
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}
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else
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/* All other sections are ignored for now. */
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p->addr = p->endaddr = 0;
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}
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}
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/*=======================================================================*/
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/* find_solib
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**
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**Description:
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**
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** This module contains the routine which finds the names of any loaded
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** "images" in the current process. The argument in must be NULL on the
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** first call, and then the returned value must be passed in on
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** subsequent calls. This provides the capability to "step" down the
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** list of loaded objects. On the last object, a NULL value is returned.
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** The arg and return value are "struct link_map" pointers, as defined
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** in <link.h>.
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**
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** NOTE: This only works under SunOS4.0.
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*/
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struct so_list *find_solib(so_list_ptr)
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struct so_list *so_list_ptr; /* so_list_head position ptr */
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{
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struct so_list *so_list_next = 0;
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CORE_ADDR inferior_dynamic_ptr = 0;
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struct link_map *inferior_lm = 0;
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struct link_dynamic inferior_dynamic_cpy;
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struct link_dynamic_2 inferior_ld_2_cpy;
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struct so_list *new;
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int i;
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if (!so_list_ptr) {
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if (!(so_list_next = so_list_head)) {
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for (i = 0; i < misc_function_count; i++) {
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if (!strcmp (misc_function_vector[i].name, "_DYNAMIC")) {
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inferior_dynamic_ptr = misc_function_vector[i].address;
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break;
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}
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}
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if (inferior_dynamic_ptr) {
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read_memory(inferior_dynamic_ptr, &inferior_dynamic_cpy, sizeof(struct link_dynamic));
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if (inferior_dynamic_cpy.ld_version == 3) {
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read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
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&inferior_ld_2_cpy,
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sizeof(struct link_dynamic_2));
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inferior_lm = inferior_ld_2_cpy.ld_loaded;
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}
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}
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}
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} else {
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/*
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** Advance to next local abbreviated load_map structure
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*/
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if (!(inferior_lm = so_list_ptr->inferior_lm.lm_next)) {
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/* See if any were added, but be quiet if we can't read
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from the target any more. */
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int status;
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status = target_read_memory (
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(CORE_ADDR)so_list_ptr->inferior_lm_add,
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(char *)&so_list_ptr->inferior_lm,
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sizeof(struct link_map));
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if (status == 0)
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inferior_lm = so_list_ptr->inferior_lm.lm_next;
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else
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inferior_lm = 0;
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}
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so_list_next = so_list_ptr->next;
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}
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if ((!so_list_next) && inferior_lm) {
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/*
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** Get Next LM Structure from inferior image and build
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** an local abbreviated load_map structure
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*/
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new = (struct so_list *) xmalloc(sizeof(struct so_list));
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new->inferior_lm_add = inferior_lm;
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read_memory((CORE_ADDR)inferior_lm,
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&new->inferior_lm,
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sizeof(struct link_map));
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read_memory((CORE_ADDR)new->inferior_lm.lm_name,
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new->inferior_so_name,
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MAX_PATH_SIZE - 1);
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new->inferior_so_name[MAX_PATH_SIZE - 1] = 0;
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/* Zero everything after the first terminating null */
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strncpy(new->inferior_so_name, new->inferior_so_name, MAX_PATH_SIZE);
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#if 0
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/* This doesn't work for core files, so instead get ld_text
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using solib_map_sections (below). */
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read_memory((CORE_ADDR)new->inferior_lm.lm_ld,
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&inferior_dynamic_cpy,
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sizeof(struct link_dynamic));
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read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
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&inferior_ld_2_cpy,
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sizeof(struct link_dynamic_2));
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new->ld_text = inferior_ld_2_cpy.ld_text;
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#endif
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new->next = 0;
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new->symbols_loaded = 0;
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new->so_bfd = NULL;
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new->so_sections = NULL;
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if (so_list_ptr)
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so_list_ptr->next = new;
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else
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so_list_head = new;
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solib_map_sections (new);
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so_list_next = new;
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}
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return(so_list_next);
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}
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/*
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** Called by core_xfer_memory if the transfer form the core file failed.
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** We try to satisfy the request from the text sections of the shared libs.
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*/
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int
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solib_xfer_memory (memaddr, myaddr, len, write)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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int write;
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{
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int res;
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register struct so_list *so = 0;
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while (so = find_solib(so))
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{
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res = xfer_memory (memaddr, myaddr, len, write,
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so->so_bfd, so->so_sections, so->so_sections_end);
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if (res)
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return res;
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}
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return 0;
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}
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/*=======================================================================*/
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void solib_add(arg_string, from_tty)
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char *arg_string;
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int from_tty;
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{
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register struct so_list *so = 0; /* link map state variable */
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char *val;
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if (arg_string == 0)
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re_comp (".");
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else if (val = (char *) re_comp (arg_string)) {
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error ("Invalid regexp: %s", val);
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}
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/* Getting new symbols may change our opinion about what is
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frameless. */
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reinit_frame_cache ();
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printf_filtered ("All shared libraries");
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if (arg_string)
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printf_filtered (" matching regular expresion \"%s\"", arg_string);
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printf_filtered (":\n");
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dont_repeat();
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while (so = find_solib(so)) {
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if (re_exec(so->inferior_so_name)) {
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if (so->symbols_loaded) {
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printf("Symbols already loaded for %s\n", so->inferior_so_name);
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} else {
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symbol_file_add (so->inferior_so_name, from_tty,
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(unsigned int)so->inferior_lm.lm_addr, 0);
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so->symbols_loaded = 1;
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}
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}
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}
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}
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/*=======================================================================*/
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static void solib_info()
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{
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register struct so_list *so = 0; /* link map state variable */
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while (so = find_solib(so)) {
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if (so == so_list_head) {
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printf(" Address Range Symbols Shared Object Library\n");
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}
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printf(" 0x%08x - 0x%08x %s %s\n",
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so->inferior_lm.lm_addr,
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so->inferior_lm.lm_addr + so->ld_text - 1,
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(so->symbols_loaded ? "Yes" : "No "),
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so->inferior_so_name);
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}
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if (!so_list_head) {
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printf("No shared libraries loaded at this time.\n");
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}
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}
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/*
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** Called by Insert Breakpoint to see if Address is Shared Library Address
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*/
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int
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solib_address(address)
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CORE_ADDR address;
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{
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register struct so_list *so = 0; /* link map state variable */
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while (so = find_solib(so)) {
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if ((address >= (CORE_ADDR) so->inferior_lm.lm_addr) &&
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(address < (CORE_ADDR) so->inferior_lm.lm_addr + so->ld_text))
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return 1;
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}
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return 0;
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}
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/*
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** Called by free_all_symtabs
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*/
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void
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clear_solib()
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{
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struct so_list *next;
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while (so_list_head) {
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if (so_list_head->so_sections)
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free (so_list_head->so_sections);
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if (so_list_head->so_bfd)
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bfd_close (so_list_head->so_bfd);
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next = so_list_head->next;
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free(so_list_head);
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so_list_head = next;
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}
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}
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void
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_initialize_solib()
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{
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add_com("sharedlibrary", class_files, solib_add,
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"Load shared object library symbols for files matching REGEXP.");
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add_info("sharedlibrary", solib_info,
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"Status of loaded shared object libraries");
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}
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