old-cross-binutils/gdb/solib.c
Jim Kingdon e1ce8aa5ed The list of changes is too long to fit in the cvs log (since it truncates!).
Look at the ChangeLog for Apr 30 and May 1.
1991-05-02 04:28:42 +00:00

344 lines
9.4 KiB
C

/* Copyright (C) 1990 Free Software Foundation, Inc.
This file is part of GDB.
GDB 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 1, or (at your option)
any later version.
GDB 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 GDB; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/*
** symbol definitions
*/
#include <sys/types.h>
#include <string.h>
#include <link.h>
#include <sys/param.h>
#include <fcntl.h>
#include <stdio.h>
#include "defs.h"
#include "param.h"
#include "symtab.h"
#include "gdbcore.h"
#include "command.h"
#include "target.h"
#include "frame.h"
/*
** local data declarations
*/
#define MAX_PATH_SIZE 256
struct so_list {
struct link_map inferior_lm; /* inferior link map */
struct link_map *inferior_lm_add;
long ld_text;
char inferior_so_name[MAX_PATH_SIZE]; /* Shared Object Library Name */
struct so_list *next; /* Next Structure */
int symbols_loaded;
bfd *so_bfd;
struct section_table *so_sections;
struct section_table *so_sections_end;
};
static struct so_list *so_list_head = 0;
/*
** Build a section map for a shared library, record its text size in
** the so_list structure and set up the text section of the shared lib.
*/
static void
solib_map_sections(so)
struct so_list *so;
{
char *filename;
char *scratch_pathname;
int scratch_chan;
struct section_table *p;
filename = tilde_expand (so->inferior_so_name);
make_cleanup (free, filename);
scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
&scratch_pathname);
if (scratch_chan < 0)
scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, O_RDONLY, 0,
&scratch_pathname);
if (scratch_chan < 0)
perror_with_name (filename);
so->so_bfd = bfd_fdopenr (scratch_pathname, NULL, scratch_chan);
if (!so->so_bfd)
error ("Could not open `%s' as an executable file: %s",
scratch_pathname, bfd_errmsg (bfd_error));
if (!bfd_check_format (so->so_bfd, bfd_object))
error ("\"%s\": not in executable format: %s.",
scratch_pathname, bfd_errmsg (bfd_error));
if (build_section_table (so->so_bfd, &so->so_sections, &so->so_sections_end))
error ("Can't find the file sections in `%s': %s",
exec_bfd->filename, bfd_errmsg (bfd_error));
for (p = so->so_sections; p < so->so_sections_end; p++)
{
if (strcmp (bfd_section_name (so->so_bfd, p->sec_ptr), ".text") == 0)
{
/* Determine length of text section and relocate it. */
so->ld_text = p->endaddr - p->addr;
p->addr += (CORE_ADDR)so->inferior_lm.lm_addr;
p->endaddr += (CORE_ADDR)so->inferior_lm.lm_addr;
}
else
/* All other sections are ignored for now. */
p->addr = p->endaddr = 0;
}
}
/*=======================================================================*/
/* find_solib
**
**Description:
**
** This module contains the routine which finds the names of any loaded
** "images" in the current process. The argument in must be NULL on the
** first call, and then the returned value must be passed in on
** subsequent calls. This provides the capability to "step" down the
** list of loaded objects. On the last object, a NULL value is returned.
** The arg and return value are "struct link_map" pointers, as defined
** in <link.h>.
**
** NOTE: This only works under SunOS4.0.
*/
struct so_list *find_solib(so_list_ptr)
struct so_list *so_list_ptr; /* so_list_head position ptr */
{
struct so_list *so_list_next = 0;
CORE_ADDR inferior_dynamic_ptr = 0;
struct link_map *inferior_lm = 0;
struct link_dynamic inferior_dynamic_cpy;
struct link_dynamic_2 inferior_ld_2_cpy;
struct so_list *new;
int i;
if (!so_list_ptr) {
if (!(so_list_next = so_list_head)) {
for (i = 0; i < misc_function_count; i++) {
if (!strcmp (misc_function_vector[i].name, "_DYNAMIC")) {
inferior_dynamic_ptr = misc_function_vector[i].address;
break;
}
}
if (inferior_dynamic_ptr) {
read_memory(inferior_dynamic_ptr, &inferior_dynamic_cpy, sizeof(struct link_dynamic));
if (inferior_dynamic_cpy.ld_version == 3) {
read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
&inferior_ld_2_cpy,
sizeof(struct link_dynamic_2));
inferior_lm = inferior_ld_2_cpy.ld_loaded;
}
}
}
} else {
/*
** Advance to next local abbreviated load_map structure
*/
if (!(inferior_lm = so_list_ptr->inferior_lm.lm_next)) {
/* See if any were added, but be quiet if we can't read
from the target any more. */
int status;
status = target_read_memory (
(CORE_ADDR)so_list_ptr->inferior_lm_add,
(char *)&so_list_ptr->inferior_lm,
sizeof(struct link_map));
if (status == 0)
inferior_lm = so_list_ptr->inferior_lm.lm_next;
else
inferior_lm = 0;
}
so_list_next = so_list_ptr->next;
}
if ((!so_list_next) && inferior_lm) {
/*
** Get Next LM Structure from inferior image and build
** an local abbreviated load_map structure
*/
new = (struct so_list *) xmalloc(sizeof(struct so_list));
new->inferior_lm_add = inferior_lm;
read_memory((CORE_ADDR)inferior_lm,
&new->inferior_lm,
sizeof(struct link_map));
read_memory((CORE_ADDR)new->inferior_lm.lm_name,
new->inferior_so_name,
MAX_PATH_SIZE - 1);
new->inferior_so_name[MAX_PATH_SIZE - 1] = 0;
/* Zero everything after the first terminating null */
strncpy(new->inferior_so_name, new->inferior_so_name, MAX_PATH_SIZE);
#if 0
/* This doesn't work for core files, so instead get ld_text
using solib_map_sections (below). */
read_memory((CORE_ADDR)new->inferior_lm.lm_ld,
&inferior_dynamic_cpy,
sizeof(struct link_dynamic));
read_memory((CORE_ADDR)inferior_dynamic_cpy.ld_un.ld_2,
&inferior_ld_2_cpy,
sizeof(struct link_dynamic_2));
new->ld_text = inferior_ld_2_cpy.ld_text;
#endif
new->next = 0;
new->symbols_loaded = 0;
new->so_bfd = NULL;
new->so_sections = NULL;
if (so_list_ptr)
so_list_ptr->next = new;
else
so_list_head = new;
solib_map_sections (new);
so_list_next = new;
}
return(so_list_next);
}
/*
** Called by core_xfer_memory if the transfer form the core file failed.
** We try to satisfy the request from the text sections of the shared libs.
*/
int
solib_xfer_memory (memaddr, myaddr, len, write)
CORE_ADDR memaddr;
char *myaddr;
int len;
int write;
{
int res;
register struct so_list *so = 0;
while (so = find_solib(so))
{
res = xfer_memory (memaddr, myaddr, len, write,
so->so_bfd, so->so_sections, so->so_sections_end);
if (res)
return res;
}
return 0;
}
/*=======================================================================*/
void solib_add(arg_string, from_tty)
char *arg_string;
int from_tty;
{
register struct so_list *so = 0; /* link map state variable */
char *val;
if (arg_string == 0)
re_comp (".");
else if (val = (char *) re_comp (arg_string)) {
error ("Invalid regexp: %s", val);
}
/* Getting new symbols may change our opinion about what is
frameless. */
reinit_frame_cache ();
printf_filtered ("All shared libraries");
if (arg_string)
printf_filtered (" matching regular expresion \"%s\"", arg_string);
printf_filtered (":\n");
dont_repeat();
while (so = find_solib(so)) {
if (re_exec(so->inferior_so_name)) {
if (so->symbols_loaded) {
printf("Symbols already loaded for %s\n", so->inferior_so_name);
} else {
symbol_file_add (so->inferior_so_name, from_tty,
(unsigned int)so->inferior_lm.lm_addr, 0);
so->symbols_loaded = 1;
}
}
}
}
/*=======================================================================*/
static void solib_info()
{
register struct so_list *so = 0; /* link map state variable */
while (so = find_solib(so)) {
if (so == so_list_head) {
printf(" Address Range Symbols Shared Object Library\n");
}
printf(" 0x%08x - 0x%08x %s %s\n",
so->inferior_lm.lm_addr,
so->inferior_lm.lm_addr + so->ld_text - 1,
(so->symbols_loaded ? "Yes" : "No "),
so->inferior_so_name);
}
if (!so_list_head) {
printf("No shared libraries loaded at this time.\n");
}
}
/*
** Called by Insert Breakpoint to see if Address is Shared Library Address
*/
int
solib_address(address)
CORE_ADDR address;
{
register struct so_list *so = 0; /* link map state variable */
while (so = find_solib(so)) {
if ((address >= (CORE_ADDR) so->inferior_lm.lm_addr) &&
(address < (CORE_ADDR) so->inferior_lm.lm_addr + so->ld_text))
return 1;
}
return 0;
}
/*
** Called by free_all_symtabs
*/
void
clear_solib()
{
struct so_list *next;
while (so_list_head) {
if (so_list_head->so_sections)
free (so_list_head->so_sections);
if (so_list_head->so_bfd)
bfd_close (so_list_head->so_bfd);
next = so_list_head->next;
free(so_list_head);
so_list_head = next;
}
}
void
_initialize_solib()
{
add_com("sharedlibrary", class_files, solib_add,
"Load shared object library symbols for files matching REGEXP.");
add_info("sharedlibrary", solib_info,
"Status of loaded shared object libraries");
}