9de0904cce
message if bfd_close fails. * exec.c (exec_close), solib.c (clear_solib), corelow.c (core_close), objfiles.c (free_objfile), irix5-nat.c (clear_solib), osfsolib.c (clear_solib), remote-utils.c (gr_load_image): Check for errors from bfd_close. * solib.c (look_for_base), remote-utils.c (gr_load_image), remote-udi.c (download), corelow.c (core_open), symfile.c (symfile_bfd_open), symfile.c (generic_load): Add comment regarding error from bfd_close. * remote-udi.c (download), remote-utils.c (gr_load_image): Add comment about bogus handling of errors from bfd_openr. * exec.c (exec_close): Add comment regarding memory leak and dangling reference to vp->name.
802 lines
20 KiB
C
802 lines
20 KiB
C
/* Handle OSF/1 shared libraries for GDB, the GNU Debugger.
|
|
Copyright 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/* FIXME: Most of this code could be merged with solib.c by using
|
|
next_link_map_member and xfer_link_map_member in solib.c. */
|
|
|
|
#include "defs.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "symtab.h"
|
|
#include "bfd.h"
|
|
#include "symfile.h"
|
|
#include "objfiles.h"
|
|
#include "gdbcore.h"
|
|
#include "command.h"
|
|
#include "target.h"
|
|
#include "frame.h"
|
|
#include "regex.h"
|
|
#include "inferior.h"
|
|
#include "language.h"
|
|
|
|
#define MAX_PATH_SIZE 256 /* FIXME: Should be dynamic */
|
|
|
|
/* FIXME: This is a terrible hack for shared library support under OSF/1.
|
|
The main problem is that the needed definitions are not contained in
|
|
the system header files.
|
|
The ldr_* routines described in loader(3) would be the way to go here.
|
|
But they do not work for arbitrary target processes (as documented). */
|
|
|
|
#ifndef USE_LDR_ROUTINES
|
|
#define RLD_CONTEXT_ADDRESS 0x3ffc0000000
|
|
|
|
typedef struct
|
|
{
|
|
CORE_ADDR next;
|
|
CORE_ADDR previous;
|
|
CORE_ADDR unknown;
|
|
char *module_name;
|
|
CORE_ADDR modinfo_addr;
|
|
} ldr_module_info_t;
|
|
|
|
typedef struct
|
|
{
|
|
CORE_ADDR unknown1;
|
|
CORE_ADDR unknown2;
|
|
CORE_ADDR head;
|
|
CORE_ADDR tail;
|
|
} ldr_context_t;
|
|
|
|
static ldr_context_t ldr_context;
|
|
#else
|
|
#include <loader.h>
|
|
#endif
|
|
|
|
/* Define our own link_map structure.
|
|
This will help to share code with solib.c. */
|
|
|
|
struct link_map {
|
|
CORE_ADDR l_addr; /* address at which object mapped */
|
|
char *l_name; /* full name of loaded object */
|
|
ldr_module_info_t module_info; /* corresponding module info */
|
|
};
|
|
|
|
#define LM_ADDR(so) ((so) -> lm.l_addr)
|
|
#define LM_NAME(so) ((so) -> lm.l_name)
|
|
|
|
struct so_list {
|
|
struct so_list *next; /* next structure in linked list */
|
|
struct link_map lm; /* copy of link map from inferior */
|
|
struct link_map *lmaddr; /* addr in inferior lm was read from */
|
|
CORE_ADDR lmend; /* upper addr bound of mapped object */
|
|
char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */
|
|
char symbols_loaded; /* flag: symbols read in yet? */
|
|
char from_tty; /* flag: print msgs? */
|
|
struct objfile *objfile; /* objfile for loaded lib */
|
|
struct section_table *sections;
|
|
struct section_table *sections_end;
|
|
struct section_table *textsection;
|
|
bfd *abfd;
|
|
};
|
|
|
|
static struct so_list *so_list_head; /* List of known shared objects */
|
|
|
|
extern int
|
|
fdmatch PARAMS ((int, int)); /* In libiberty */
|
|
|
|
/* Local function prototypes */
|
|
|
|
static void
|
|
sharedlibrary_command PARAMS ((char *, int));
|
|
|
|
static void
|
|
info_sharedlibrary_command PARAMS ((char *, int));
|
|
|
|
static int
|
|
symbol_add_stub PARAMS ((char *));
|
|
|
|
static struct so_list *
|
|
find_solib PARAMS ((struct so_list *));
|
|
|
|
static struct link_map *
|
|
first_link_map_member PARAMS ((void));
|
|
|
|
static struct link_map *
|
|
next_link_map_member PARAMS ((struct so_list *));
|
|
|
|
static void
|
|
xfer_link_map_member PARAMS ((struct so_list *, struct link_map *));
|
|
|
|
static void
|
|
solib_map_sections PARAMS ((struct so_list *));
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
solib_map_sections -- open bfd and build sections for shared lib
|
|
|
|
SYNOPSIS
|
|
|
|
static void solib_map_sections (struct so_list *so)
|
|
|
|
DESCRIPTION
|
|
|
|
Given a pointer to one of the shared objects in our list
|
|
of mapped objects, use the recorded name to open a bfd
|
|
descriptor for the object, build a section table, and then
|
|
relocate all the section addresses by the base address at
|
|
which the shared object was mapped.
|
|
|
|
FIXMES
|
|
|
|
In most (all?) cases the shared object file name recorded in the
|
|
dynamic linkage tables will be a fully qualified pathname. For
|
|
cases where it isn't, do we really mimic the systems search
|
|
mechanism correctly in the below code (particularly the tilde
|
|
expansion stuff?).
|
|
*/
|
|
|
|
static void
|
|
solib_map_sections (so)
|
|
struct so_list *so;
|
|
{
|
|
char *filename;
|
|
char *scratch_pathname;
|
|
int scratch_chan;
|
|
struct section_table *p;
|
|
struct cleanup *old_chain;
|
|
bfd *abfd;
|
|
|
|
filename = tilde_expand (so -> so_name);
|
|
old_chain = 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);
|
|
}
|
|
/* Leave scratch_pathname allocated. bfd->name will point to it. */
|
|
|
|
abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
|
|
if (!abfd)
|
|
{
|
|
close (scratch_chan);
|
|
error ("Could not open `%s' as an executable file: %s",
|
|
scratch_pathname, bfd_errmsg (bfd_get_error ()));
|
|
}
|
|
/* Leave bfd open, core_xfer_memory and "info files" need it. */
|
|
so -> abfd = abfd;
|
|
abfd -> cacheable = true;
|
|
|
|
if (!bfd_check_format (abfd, bfd_object))
|
|
{
|
|
error ("\"%s\": not in executable format: %s.",
|
|
scratch_pathname, bfd_errmsg (bfd_get_error ()));
|
|
}
|
|
if (build_section_table (abfd, &so -> sections, &so -> sections_end))
|
|
{
|
|
error ("Can't find the file sections in `%s': %s",
|
|
bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ()));
|
|
}
|
|
|
|
for (p = so -> sections; p < so -> sections_end; p++)
|
|
{
|
|
/* Relocate the section binding addresses as recorded in the shared
|
|
object's file by the base address to which the object was actually
|
|
mapped. */
|
|
p -> addr += (CORE_ADDR) LM_ADDR (so);
|
|
p -> endaddr += (CORE_ADDR) LM_ADDR (so);
|
|
so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
|
|
if (STREQ (p -> the_bfd_section -> name, ".text"))
|
|
{
|
|
so -> textsection = p;
|
|
}
|
|
}
|
|
|
|
/* Free the file names, close the file now. */
|
|
do_cleanups (old_chain);
|
|
}
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
first_link_map_member -- locate first member in dynamic linker's map
|
|
|
|
SYNOPSIS
|
|
|
|
static struct link_map *first_link_map_member (void)
|
|
|
|
DESCRIPTION
|
|
|
|
Read in a copy of the first member in the inferior's dynamic
|
|
link map from the inferior's dynamic linker structures, and return
|
|
a pointer to the copy in our address space.
|
|
*/
|
|
|
|
static struct link_map *
|
|
first_link_map_member ()
|
|
{
|
|
struct link_map *lm = NULL;
|
|
static struct link_map first_lm;
|
|
|
|
#ifdef USE_LDR_ROUTINES
|
|
ldr_module_t mod_id = LDR_NULL_MODULE;
|
|
size_t retsize;
|
|
|
|
if (ldr_next_module(inferior_pid, &mod_id) != 0
|
|
|| mod_id == LDR_NULL_MODULE
|
|
|| ldr_inq_module(inferior_pid, mod_id,
|
|
&first_lm.module_info, sizeof(ldr_module_info_t),
|
|
&retsize) != 0)
|
|
return lm;
|
|
#else
|
|
CORE_ADDR ldr_context_addr;
|
|
|
|
if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS,
|
|
(char *) &ldr_context_addr,
|
|
sizeof (CORE_ADDR)) != 0
|
|
|| target_read_memory (ldr_context_addr,
|
|
(char *) &ldr_context,
|
|
sizeof (ldr_context_t)) != 0
|
|
|| target_read_memory ((CORE_ADDR) ldr_context.head,
|
|
(char *) &first_lm.module_info,
|
|
sizeof (ldr_module_info_t)) != 0)
|
|
return lm;
|
|
#endif
|
|
|
|
lm = &first_lm;
|
|
|
|
/* The first entry is for the main program and should be skipped. */
|
|
lm->l_name = NULL;
|
|
|
|
return lm;
|
|
}
|
|
|
|
static struct link_map *
|
|
next_link_map_member (so_list_ptr)
|
|
struct so_list *so_list_ptr;
|
|
{
|
|
struct link_map *lm = NULL;
|
|
static struct link_map next_lm;
|
|
#ifdef USE_LDR_ROUTINES
|
|
ldr_module_t mod_id = lm->module_info.lmi_modid;
|
|
size_t retsize;
|
|
|
|
if (ldr_next_module(inferior_pid, &mod_id) != 0
|
|
|| mod_id == LDR_NULL_MODULE
|
|
|| ldr_inq_module(inferior_pid, mod_id,
|
|
&next_lm.module_info, sizeof(ldr_module_info_t),
|
|
&retsize) != 0)
|
|
return lm;
|
|
|
|
lm = &next_lm;
|
|
lm->l_name = lm->module_info.lmi_name;
|
|
#else
|
|
CORE_ADDR ldr_context_addr;
|
|
|
|
/* Reread context in case ldr_context.tail was updated. */
|
|
|
|
if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS,
|
|
(char *) &ldr_context_addr,
|
|
sizeof (CORE_ADDR)) != 0
|
|
|| target_read_memory (ldr_context_addr,
|
|
(char *) &ldr_context,
|
|
sizeof (ldr_context_t)) != 0
|
|
|| so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail
|
|
|| target_read_memory (so_list_ptr->lm.module_info.next,
|
|
(char *) &next_lm.module_info,
|
|
sizeof (ldr_module_info_t)) != 0)
|
|
return lm;
|
|
|
|
lm = &next_lm;
|
|
lm->l_name = lm->module_info.module_name;
|
|
#endif
|
|
return lm;
|
|
}
|
|
|
|
static void
|
|
xfer_link_map_member (so_list_ptr, lm)
|
|
struct so_list *so_list_ptr;
|
|
struct link_map *lm;
|
|
{
|
|
so_list_ptr->lm = *lm;
|
|
|
|
/* OSF/1 has absolute addresses in shared libraries. */
|
|
LM_ADDR (so_list_ptr) = 0;
|
|
|
|
/* There is one entry that has no name (for the inferior executable)
|
|
since it is not a shared object. */
|
|
if (LM_NAME (so_list_ptr) != 0)
|
|
{
|
|
|
|
#ifdef USE_LDR_ROUTINES
|
|
int len = strlen (LM_NAME (so_list_ptr) + 1);
|
|
|
|
if (len > MAX_PATH_SIZE)
|
|
len = MAX_PATH_SIZE;
|
|
strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE);
|
|
#else
|
|
int errcode;
|
|
char *buffer;
|
|
target_read_string ((CORE_ADDR) LM_NAME (so_list_ptr), &buffer,
|
|
MAX_PATH_SIZE - 1, &errcode);
|
|
if (errcode != 0)
|
|
error ("xfer_link_map_member: Can't read pathname for load map: %s\n",
|
|
safe_strerror (errcode));
|
|
strncpy (so_list_ptr->so_name, buffer, MAX_PATH_SIZE - 1);
|
|
free (buffer);
|
|
#endif
|
|
so_list_ptr->so_name[MAX_PATH_SIZE - 1] = '\0';
|
|
|
|
solib_map_sections (so_list_ptr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
find_solib -- step through list of shared objects
|
|
|
|
SYNOPSIS
|
|
|
|
struct so_list *find_solib (struct so_list *so_list_ptr)
|
|
|
|
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>.
|
|
*/
|
|
|
|
static struct so_list *
|
|
find_solib (so_list_ptr)
|
|
struct so_list *so_list_ptr; /* Last lm or NULL for first one */
|
|
{
|
|
struct so_list *so_list_next = NULL;
|
|
struct link_map *lm = NULL;
|
|
struct so_list *new;
|
|
|
|
if (so_list_ptr == NULL)
|
|
{
|
|
/* We are setting up for a new scan through the loaded images. */
|
|
if ((so_list_next = so_list_head) == NULL)
|
|
{
|
|
/* Find the first link map list member. */
|
|
lm = first_link_map_member ();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* We have been called before, and are in the process of walking
|
|
the shared library list. Advance to the next shared object. */
|
|
lm = next_link_map_member (so_list_ptr);
|
|
so_list_next = so_list_ptr -> next;
|
|
}
|
|
if ((so_list_next == NULL) && (lm != NULL))
|
|
{
|
|
/* Get next link map structure from inferior image and build a local
|
|
abbreviated load_map structure */
|
|
new = (struct so_list *) xmalloc (sizeof (struct so_list));
|
|
memset ((char *) new, 0, sizeof (struct so_list));
|
|
new -> lmaddr = lm;
|
|
/* Add the new node as the next node in the list, or as the root
|
|
node if this is the first one. */
|
|
if (so_list_ptr != NULL)
|
|
{
|
|
so_list_ptr -> next = new;
|
|
}
|
|
else
|
|
{
|
|
so_list_head = new;
|
|
}
|
|
so_list_next = new;
|
|
xfer_link_map_member (new, lm);
|
|
}
|
|
return (so_list_next);
|
|
}
|
|
|
|
/* A small stub to get us past the arg-passing pinhole of catch_errors. */
|
|
|
|
static int
|
|
symbol_add_stub (arg)
|
|
char *arg;
|
|
{
|
|
register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
|
|
|
|
so -> objfile = symbol_file_add (so -> so_name, so -> from_tty,
|
|
so -> textsection -> addr,
|
|
0, 0, 0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
|
|
GLOBAL FUNCTION
|
|
|
|
solib_add -- add a shared library file to the symtab and section list
|
|
|
|
SYNOPSIS
|
|
|
|
void solib_add (char *arg_string, int from_tty,
|
|
struct target_ops *target)
|
|
|
|
DESCRIPTION
|
|
|
|
*/
|
|
|
|
void
|
|
solib_add (arg_string, from_tty, target)
|
|
char *arg_string;
|
|
int from_tty;
|
|
struct target_ops *target;
|
|
{
|
|
register struct so_list *so = NULL; /* link map state variable */
|
|
|
|
/* Last shared library that we read. */
|
|
struct so_list *so_last = NULL;
|
|
|
|
char *re_err;
|
|
int count;
|
|
int old;
|
|
|
|
if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
|
|
{
|
|
error ("Invalid regexp: %s", re_err);
|
|
}
|
|
|
|
|
|
/* Add the shared library sections to the section table of the
|
|
specified target, if any. */
|
|
if (target)
|
|
{
|
|
/* Count how many new section_table entries there are. */
|
|
so = NULL;
|
|
count = 0;
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
count += so -> sections_end - so -> sections;
|
|
}
|
|
}
|
|
|
|
if (count)
|
|
{
|
|
/* Reallocate the target's section table including the new size. */
|
|
if (target -> to_sections)
|
|
{
|
|
old = target -> to_sections_end - target -> to_sections;
|
|
target -> to_sections = (struct section_table *)
|
|
xrealloc ((char *)target -> to_sections,
|
|
(sizeof (struct section_table)) * (count + old));
|
|
}
|
|
else
|
|
{
|
|
old = 0;
|
|
target -> to_sections = (struct section_table *)
|
|
xmalloc ((sizeof (struct section_table)) * count);
|
|
}
|
|
target -> to_sections_end = target -> to_sections + (count + old);
|
|
|
|
/* Add these section table entries to the target's table. */
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
count = so -> sections_end - so -> sections;
|
|
memcpy ((char *) (target -> to_sections + old),
|
|
so -> sections,
|
|
(sizeof (struct section_table)) * count);
|
|
old += count;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now add the symbol files. */
|
|
so = NULL;
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0] && re_exec (so -> so_name))
|
|
{
|
|
so -> from_tty = from_tty;
|
|
if (so -> symbols_loaded)
|
|
{
|
|
if (from_tty)
|
|
{
|
|
printf_unfiltered ("Symbols already loaded for %s\n", so -> so_name);
|
|
}
|
|
}
|
|
else if (catch_errors
|
|
(symbol_add_stub, (char *) so,
|
|
"Error while reading shared library symbols:\n",
|
|
RETURN_MASK_ALL))
|
|
{
|
|
so_last = so;
|
|
so -> symbols_loaded = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Getting new symbols may change our opinion about what is
|
|
frameless. */
|
|
if (so_last)
|
|
reinit_frame_cache ();
|
|
}
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
info_sharedlibrary_command -- code for "info sharedlibrary"
|
|
|
|
SYNOPSIS
|
|
|
|
static void info_sharedlibrary_command ()
|
|
|
|
DESCRIPTION
|
|
|
|
Walk through the shared library list and print information
|
|
about each attached library.
|
|
*/
|
|
|
|
static void
|
|
info_sharedlibrary_command (ignore, from_tty)
|
|
char *ignore;
|
|
int from_tty;
|
|
{
|
|
register struct so_list *so = NULL; /* link map state variable */
|
|
int header_done = 0;
|
|
|
|
if (exec_bfd == NULL)
|
|
{
|
|
printf_unfiltered ("No exec file.\n");
|
|
return;
|
|
}
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0])
|
|
{
|
|
unsigned long txt_start = 0;
|
|
unsigned long txt_end = 0;
|
|
|
|
if (!header_done)
|
|
{
|
|
printf_unfiltered("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read",
|
|
"Shared Object Library");
|
|
header_done++;
|
|
}
|
|
if (so -> textsection)
|
|
{
|
|
txt_start = (unsigned long) so -> textsection -> addr;
|
|
txt_end = (unsigned long) so -> textsection -> endaddr;
|
|
}
|
|
printf_unfiltered ("%-20s", local_hex_string_custom (txt_start, "08l"));
|
|
printf_unfiltered ("%-20s", local_hex_string_custom (txt_end, "08l"));
|
|
printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
|
|
printf_unfiltered ("%s\n", so -> so_name);
|
|
}
|
|
}
|
|
if (so_list_head == NULL)
|
|
{
|
|
printf_unfiltered ("No shared libraries loaded at this time.\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
GLOBAL FUNCTION
|
|
|
|
solib_address -- check to see if an address is in a shared lib
|
|
|
|
SYNOPSIS
|
|
|
|
int solib_address (CORE_ADDR address)
|
|
|
|
DESCRIPTION
|
|
|
|
Provides a hook for other gdb routines to discover whether or
|
|
not a particular address is within the mapped address space of
|
|
a shared library. Any address between the base mapping address
|
|
and the first address beyond the end of the last mapping, is
|
|
considered to be within the shared library address space, for
|
|
our purposes.
|
|
|
|
For example, this routine is called at one point to disable
|
|
breakpoints which are in shared libraries that are not currently
|
|
mapped in.
|
|
*/
|
|
|
|
int
|
|
solib_address (address)
|
|
CORE_ADDR address;
|
|
{
|
|
register struct so_list *so = 0; /* link map state variable */
|
|
|
|
while ((so = find_solib (so)) != NULL)
|
|
{
|
|
if (so -> so_name[0] && so -> textsection)
|
|
{
|
|
if ((address >= (CORE_ADDR) so -> textsection -> addr) &&
|
|
(address < (CORE_ADDR) so -> textsection -> endaddr))
|
|
{
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/* Called by free_all_symtabs */
|
|
|
|
void
|
|
clear_solib()
|
|
{
|
|
struct so_list *next;
|
|
char *bfd_filename;
|
|
|
|
while (so_list_head)
|
|
{
|
|
if (so_list_head -> sections)
|
|
{
|
|
free ((PTR)so_list_head -> sections);
|
|
}
|
|
if (so_list_head -> abfd)
|
|
{
|
|
bfd_filename = bfd_get_filename (so_list_head -> abfd);
|
|
if (!bfd_close (so_list_head -> abfd))
|
|
warning ("cannot close \"%s\": %s",
|
|
bfd_filename, bfd_errmsg (bfd_get_error ()));
|
|
}
|
|
else
|
|
/* This happens for the executable on SVR4. */
|
|
bfd_filename = NULL;
|
|
|
|
next = so_list_head -> next;
|
|
if (bfd_filename)
|
|
free ((PTR)bfd_filename);
|
|
free ((PTR)so_list_head);
|
|
so_list_head = next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
|
|
GLOBAL FUNCTION
|
|
|
|
solib_create_inferior_hook -- shared library startup support
|
|
|
|
SYNOPSIS
|
|
|
|
void solib_create_inferior_hook()
|
|
|
|
DESCRIPTION
|
|
|
|
When gdb starts up the inferior, it nurses it along (through the
|
|
shell) until it is ready to execute it's first instruction. At this
|
|
point, this function gets called via expansion of the macro
|
|
SOLIB_CREATE_INFERIOR_HOOK.
|
|
For a statically bound executable, this first instruction is the
|
|
one at "_start", or a similar text label. No further processing is
|
|
needed in that case.
|
|
For a dynamically bound executable, this first instruction is somewhere
|
|
in the rld, and the actual user executable is not yet mapped in.
|
|
We continue the inferior again, rld then maps in the actual user
|
|
executable and any needed shared libraries and then sends
|
|
itself a SIGTRAP.
|
|
At that point we discover the names of all shared libraries and
|
|
read their symbols in.
|
|
|
|
FIXME
|
|
|
|
This code does not properly handle hitting breakpoints which the
|
|
user might have set in the rld itself. Proper handling would have
|
|
to check if the SIGTRAP happened due to a kill call.
|
|
|
|
Also, what if child has exit()ed? Must exit loop somehow.
|
|
*/
|
|
|
|
void
|
|
solib_create_inferior_hook()
|
|
{
|
|
|
|
/* Nothing to do for statically bound executables. */
|
|
|
|
if (symfile_objfile == NULL
|
|
|| symfile_objfile->obfd == NULL
|
|
|| ((bfd_get_file_flags (symfile_objfile->obfd) & DYNAMIC) == 0))
|
|
return;
|
|
|
|
/* Now run the target. It will eventually get a SIGTRAP, at
|
|
which point all of the libraries will have been mapped in and we
|
|
can go groveling around in the rld structures to find
|
|
out what we need to know about them. */
|
|
|
|
clear_proceed_status ();
|
|
stop_soon_quietly = 1;
|
|
stop_signal = TARGET_SIGNAL_0;
|
|
do
|
|
{
|
|
target_resume (-1, 0, stop_signal);
|
|
wait_for_inferior ();
|
|
}
|
|
while (stop_signal != TARGET_SIGNAL_TRAP);
|
|
|
|
/* solib_add will call reinit_frame_cache.
|
|
But we are stopped in the runtime loader and we do not have symbols
|
|
for the runtime loader. So heuristic_proc_start will be called
|
|
and will put out an annoying warning.
|
|
Delaying the resetting of stop_soon_quietly until after symbol loading
|
|
suppresses the warning. */
|
|
solib_add ((char *) 0, 0, (struct target_ops *) 0);
|
|
stop_soon_quietly = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
|
|
LOCAL FUNCTION
|
|
|
|
sharedlibrary_command -- handle command to explicitly add library
|
|
|
|
SYNOPSIS
|
|
|
|
static void sharedlibrary_command (char *args, int from_tty)
|
|
|
|
DESCRIPTION
|
|
|
|
*/
|
|
|
|
static void
|
|
sharedlibrary_command (args, from_tty)
|
|
char *args;
|
|
int from_tty;
|
|
{
|
|
dont_repeat ();
|
|
solib_add (args, from_tty, (struct target_ops *) 0);
|
|
}
|
|
|
|
void
|
|
_initialize_solib()
|
|
{
|
|
|
|
add_com ("sharedlibrary", class_files, sharedlibrary_command,
|
|
"Load shared object library symbols for files matching REGEXP.");
|
|
add_info ("sharedlibrary", info_sharedlibrary_command,
|
|
"Status of loaded shared object libraries.");
|
|
}
|