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2002-10-21 Elena Zannoni <ezannoni@redhat.com>

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* solib-svr4.c (svr4_fetch_objfile_link_map): New function.
        * solib-svr4.h (svr4_fetch_objfile_link_map): Export.
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Elena Zannoni 2002-10-21 18:42:40 +00:00
parent 631cb423b2
commit bc4a16aedd
2 changed files with 76 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2002-10-21 Elena Zannoni <ezannoni@redhat.com>
* solib-svr4.c (svr4_fetch_objfile_link_map): New function.
* solib-svr4.h (svr4_fetch_objfile_link_map): Export.
2002-10-21 Elena Zannoni <ezannoni@redhat.com>
* symtab.h (address_class): Rename

71
gdb/solib-svr4.c
View file

@ -762,6 +762,77 @@ svr4_current_sos (void)
return head;
}
/* Get the address of the link_map for a given OBJFILE. Loop through
the link maps, and return the address of the one corresponding to
the given objfile. Note that this function takes into account that
objfile can be the main executable, not just a shared library. The
main executable has always an empty name field in the linkmap. */
CORE_ADDR
svr4_fetch_objfile_link_map (struct objfile *objfile)
{
CORE_ADDR lm;
if ((debug_base = locate_base ()) == 0)
return 0; /* failed somehow... */
/* Position ourselves on the first link map. */
lm = first_link_map_member ();
while (lm)
{
/* Get info on the layout of the r_debug and link_map structures. */
struct link_map_offsets *lmo = SVR4_FETCH_LINK_MAP_OFFSETS ();
int errcode;
char *buffer;
struct lm_info objfile_lm_info;
struct cleanup *old_chain;
CORE_ADDR name_address;
char *l_name_buf = xmalloc (lmo->l_name_size);
old_chain = make_cleanup (xfree, l_name_buf);
/* Set up the buffer to contain the portion of the link_map
structure that gdb cares about. Note that this is not the
whole link_map structure. */
objfile_lm_info.lm = xmalloc (lmo->link_map_size);
make_cleanup (xfree, objfile_lm_info.lm);
memset (objfile_lm_info.lm, 0, lmo->link_map_size);
/* Read the link map into our internal structure. */
read_memory (lm, objfile_lm_info.lm, lmo->link_map_size);
/* Read address of name from target memory to GDB. */
read_memory (lm + lmo->l_name_offset, l_name_buf, lmo->l_name_size);
/* Extract this object's name. */
name_address = extract_address (l_name_buf,
lmo->l_name_size);
target_read_string (name_address, &buffer,
SO_NAME_MAX_PATH_SIZE - 1, &errcode);
make_cleanup (xfree, buffer);
if (errcode != 0)
{
warning ("svr4_fetch_objfile_link_map: Can't read pathname for load map: %s\n",
safe_strerror (errcode));
}
else
{
/* Is this the linkmap for the file we want? */
/* If the file is not a shared library and has no name,
we are sure it is the main executable, so we return that. */
if ((buffer && strcmp (buffer, objfile->name) == 0)
|| (!(objfile->flags & OBJF_SHARED) && (strcmp (buffer, "") == 0)))
{
do_cleanups (old_chain);
return lm;
}
}
/* Not the file we wanted, continue checking. */
lm = extract_address (objfile_lm_info.lm + lmo->l_next_offset,
lmo->l_next_size);
do_cleanups (old_chain);
}
return 0;
}
/* On some systems, the only way to recognize the link map entry for
the main executable file is by looking at its name. Return