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2000-11-20 Michael Snyder <msnyder@cleaver.cygnus.com>

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* solist.h: Declare new function solib_open.
        * solib.c (solib_open): New function.  Abstracts some of the
        code from solib_map_sections, for finding the binary solib file.
        (solib_map_sections): Call solib_open.
        * solib-svr4.c (enable_break): Call solib_open.
This commit is contained in:
Michael Snyder 2000-11-21 01:09:54 +00:00
parent 22c720812e
commit e4f7b8c818
4 changed files with 103 additions and 51 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2000-11-20 Michael Snyder <msnyder@cleaver.cygnus.com>
* solist.h: Declare new function solib_open.
* solib.c (solib_open): New function. Abstracts some of the
code from solib_map_sections, for finding the binary solib file.
(solib_map_sections): Call solib_open.
* solib-svr4.c (enable_break): Call solib_open.
2000-11-20 J.T. Conklin <jtc@redback.com>
* gdbserver/low-nbsd.c (fetch_inferior_registers,

21
gdb/solib-svr4.c
View File

@ -287,7 +287,6 @@ IGNORE_FIRST_LINK_MAP_ENTRY (struct so_list *so)
#endif /* !SVR4_SHARED_LIBS */
static CORE_ADDR debug_base; /* Base of dynamic linker structures */
static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
@ -295,16 +294,6 @@ static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
static int match_main (char *);
/* If non-zero, this is a prefix that will be added to the front of the name
shared libraries with an absolute filename for loading. */
static char *solib_absolute_prefix = NULL;
/* If non-empty, this is a search path for loading non-absolute shared library
symbol files. This takes precedence over the environment variables PATH
and LD_LIBRARY_PATH. */
static char *solib_search_path = NULL;
#ifndef SVR4_SHARED_LIBS
/* Allocate the runtime common object file. */
@ -1269,7 +1258,9 @@ enable_break (void)
unsigned int interp_sect_size;
char *buf;
CORE_ADDR load_addr;
bfd *tmp_bfd;
bfd *tmp_bfd = NULL;
int tmp_fd = -1;
char *tmp_pathname = NULL;
CORE_ADDR sym_addr = 0;
/* Read the contents of the .interp section into a local buffer;
@ -1287,7 +1278,11 @@ enable_break (void)
to find any magic formula to find it for Solaris (appears to
be trivial on GNU/Linux). Therefore, we have to try an alternate
mechanism to find the dynamic linker's base address. */
tmp_bfd = bfd_openr (buf, gnutarget);
tmp_fd = solib_open (buf, &tmp_pathname);
if (tmp_fd >= 0)
tmp_bfd = bfd_fdopenr (tmp_pathname, gnutarget, tmp_fd);
if (tmp_bfd == NULL)
goto bkpt_at_symbol;

122
gdb/solib.c
View File

@ -64,6 +64,85 @@ static char *solib_absolute_prefix = NULL;
and LD_LIBRARY_PATH. */
static char *solib_search_path = NULL;
/*
GLOBAL FUNCTION
solib_open -- Find a shared library file and open it.
SYNOPSIS
int solib_open (char *in_patname, char **found_pathname);
DESCRIPTION
Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory
to search for shared libraries if they have an absolute path.
Global variable SOLIB_SEARCH_PATH is used as a prefix directory
(or set of directories, as in LD_LIBRARY_PATH) to search for all
shared libraries if not found in SOLIB_ABSOLUTE_PREFIX.
Search order:
* If path is absolute, look in SOLIB_ABSOLUTE_PREFIX.
* If path is absolute, look for it literally (unmodified).
* Look in SOLIB_SEARCH_PATH.
* Look in inferior's $PATH.
* Look in inferior's $LD_LIBRARY_PATH.
RETURNS
file handle for opened solib, or -1 for failure. */
int
solib_open (char *in_pathname, char **found_pathname)
{
int found_file = -1;
char *temp_pathname = NULL;
if (solib_absolute_prefix != NULL &&
ROOTED_P (in_pathname))
{
int prefix_len = strlen (solib_absolute_prefix);
/* Remove trailing slashes from absolute prefix. */
while (prefix_len > 0 && SLASH_P (solib_absolute_prefix[prefix_len - 1]))
prefix_len--;
/* Cat the prefixed pathname together. */
temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
strncpy (temp_pathname, solib_absolute_prefix, prefix_len);
temp_pathname[prefix_len] = '\0';
strcat (temp_pathname, in_pathname);
/* Now see if we can open it. */
found_file = open (temp_pathname, O_RDONLY, 0);
}
/* If not found, next search the solib_search_path (if any). */
if (found_file < 0 && solib_search_path != NULL)
found_file = openp (solib_search_path,
1, in_pathname, O_RDONLY, 0, &temp_pathname);
/* If not found, next search the inferior's $PATH environment variable. */
if (found_file < 0 && solib_search_path != NULL)
found_file = openp (get_in_environ (inferior_environ, "PATH"),
1, in_pathname, O_RDONLY, 0, &temp_pathname);
/* If not found, next search the inferior's $LD_LIBRARY_PATH
environment variable. */
if (found_file < 0 && solib_search_path != NULL)
found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
1, in_pathname, O_RDONLY, 0, &temp_pathname);
/* Done. If not found, tough luck. Return found_file and
(optionally) found_pathname. */
if (found_pathname != NULL)
*found_pathname = strsave (temp_pathname);
return found_file;
}
/*
LOCAL FUNCTION
@ -104,49 +183,15 @@ solib_map_sections (PTR arg)
filename = tilde_expand (so->so_name);
if (solib_absolute_prefix && ROOTED_P (filename))
/* Prefix shared libraries with absolute filenames with
SOLIB_ABSOLUTE_PREFIX. */
{
char *pfxed_fn;
int pfx_len;
pfx_len = strlen (solib_absolute_prefix);
/* Remove trailing slashes. */
while (pfx_len > 0 && SLASH_P (solib_absolute_prefix[pfx_len - 1]))
pfx_len--;
pfxed_fn = xmalloc (pfx_len + strlen (filename) + 1);
strcpy (pfxed_fn, solib_absolute_prefix);
strcat (pfxed_fn, filename);
free (filename);
filename = pfxed_fn;
}
old_chain = make_cleanup (free, filename);
scratch_chan = solib_open (filename, &scratch_pathname);
scratch_chan = -1;
if (solib_search_path)
scratch_chan = openp (solib_search_path,
1, filename, O_RDONLY, 0, &scratch_pathname);
if (scratch_chan < 0)
scratch_chan = openp (get_in_environ (inferior_environ, "PATH"),
1, filename, O_RDONLY, 0, &scratch_pathname);
if (scratch_chan < 0)
{
scratch_chan = openp (get_in_environ
(inferior_environ, "LD_LIBRARY_PATH"),
1, filename, O_RDONLY, 0, &scratch_pathname);
}
if (scratch_chan < 0)
{
perror_with_name (filename);
}
/* Leave scratch_pathname allocated. abfd->name will point to it. */
/* Leave scratch_pathname allocated. abfd->name will point to it. */
abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
if (!abfd)
{
@ -154,12 +199,13 @@ solib_map_sections (PTR arg)
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;
/* copy full path name into so_name, so that later symbol_file_add can find
it */
/* copy full path name into so_name, so that later symbol_file_add
can find it */
if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE)
error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure.");
strcpy (so->so_name, scratch_pathname);

3
gdb/solist.h
View File

@ -93,6 +93,9 @@ struct target_so_ops
void free_so (struct so_list *so);
/* Find solib binary file and open it. */
extern int solib_open (char *in_pathname, char **found_pathname);
/* FIXME: gdbarch needs to control this variable */
extern struct target_so_ops *current_target_so_ops;