diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-close.c | 4 | ||||
| -rw-r--r-- | elf/dl-open.c | 82 | ||||
| -rw-r--r-- | elf/dlfcn.h | 10 |
3 files changed, 69 insertions, 27 deletions
diff --git a/elf/dl-close.c b/elf/dl-close.c index 8b352d0..e1ca142 100644 --- a/elf/dl-close.c +++ b/elf/dl-close.c @@ -62,7 +62,9 @@ _dl_close (struct link_map *map) { struct link_map *imap = list[i]; if (imap->l_opencount == 1 && imap->l_type == lt_loaded - && imap->l_info[DT_FINI]) + && imap->l_info[DT_FINI] + /* Skip any half-cooked objects that were never initialized. */ + && imap->l_init_called) { /* When debugging print a message first. */ if (_dl_debug_impcalls) diff --git a/elf/dl-open.c b/elf/dl-open.c index 2b95909..b595f2d 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -20,6 +20,7 @@ #include <dlfcn.h> #include <errno.h> #include <stdlib.h> +#include <string.h> #include <bits/libc-lock.h> #include <elf/ldsodefs.h> @@ -50,25 +51,31 @@ static size_t _dl_global_scope_alloc; __libc_lock_define_initialized_recursive (, _dl_load_lock) -struct link_map * -internal_function -_dl_open (const char *file, int mode) +/* We must be carefull not to leave us in an inconsistent state. Thus we + catch any error and re-raise it after cleaning up. */ + +struct dl_open_args { + const char *file; + int mode; + struct link_map *map; +}; + +static void +dl_open_worker (void *a) +{ + struct dl_open_args *args = a; + const char *file = args->file; + int mode = args->mode; struct link_map *new, *l; ElfW(Addr) init; struct r_debug *r; - /* Make sure we are alone. */ - __libc_lock_lock (_dl_load_lock); - /* Load the named object. */ - new = _dl_map_object (NULL, file, 0, lt_loaded, 0); + args->map = new = _dl_map_object (NULL, file, 0, lt_loaded, 0); if (new->l_searchlist) - { - /* It was already open. */ - __libc_lock_unlock (_dl_load_lock); - return new; - } + /* It was already open. */ + return; /* Load that object's dependencies. */ _dl_map_object_deps (new, NULL, 0, 0); @@ -147,7 +154,7 @@ _dl_open (const char *file, int mode) { _dl_global_scope = _dl_default_scope; nomem: - _dl_close (new); + new->l_global = 0; _dl_signal_error (ENOMEM, file, "cannot extend global scope"); } _dl_global_scope[2] = _dl_default_scope[2]; @@ -158,8 +165,8 @@ _dl_open (const char *file, int mode) } else { - if (_dl_global_scope_alloc < - (size_t) (_dl_global_scope_end - _dl_global_scope + 2)) + if (_dl_global_scope_end + 2 + == _dl_global_scope + _dl_global_scope_alloc) { /* Must extend the list. */ struct link_map **new = realloc (_dl_global_scope, @@ -167,9 +174,8 @@ _dl_open (const char *file, int mode) * sizeof (struct link_map *)); if (! new) goto nomem; - _dl_global_scope_end = new + (_dl_global_scope_end - - _dl_global_scope); _dl_global_scope = new; + _dl_global_scope_end = new + _dl_global_scope_alloc - 2; _dl_global_scope_alloc *= 2; } @@ -199,9 +205,49 @@ _dl_open (const char *file, int mode) /* We must be the static _dl_open in libc.a. A static program that has loaded a dynamic object now has competition. */ __libc_multiple_libcs = 1; +} + + +struct link_map * +internal_function +_dl_open (const char *file, int mode) +{ + struct dl_open_args args; + char *errstring; + int errcode; + + /* Make sure we are alone. */ + __libc_lock_lock (_dl_load_lock); + + args.file = file; + args.mode = mode; + args.map = NULL; + errcode = _dl_catch_error (&errstring, dl_open_worker, &args); /* Release the lock. */ __libc_lock_unlock (_dl_load_lock); - return new; + if (errstring) + { + /* Some error occured during loading. */ + char *local_errstring; + + /* Reset the global scope. */ + *_dl_global_scope_end = NULL; + + /* Remove the object from memory. It may be in an inconsistent + state if relocation failed, for example. */ + if (args.map) + _dl_close (args.map); + + /* Make a local copy of the error string so that we can release the + memory allocated for it. */ + local_errstring = strdupa (errstring); + free (errstring); + + /* Reraise the error. */ + _dl_signal_error (errcode, NULL, local_errstring); + } + + return args.map; } diff --git a/elf/dlfcn.h b/elf/dlfcn.h index 2f890bf..aa2e32f 100644 --- a/elf/dlfcn.h +++ b/elf/dlfcn.h @@ -81,14 +81,8 @@ extern int dladdr __P ((const void *__address, Dl_info *__info)); into foo = DL_CALL_FCT (fctp, (arg1, arg2)); */ -# if __GNUC__ >= 2 -# define DL_CALL_FCT(fctp, args) \ - (__extension__ ({ _dl_mcount_wrapper_check (fctp); \ - (*fctp) args; })) -# else -/* This feature is not available without GCC. */ -# define DL_CALL_FCT(fctp, args) (*fctp) args -# endif +# define DL_CALL_FCT(fctp, args) \ + (_dl_mcount_wrapper_check (fctp), (*(fctp)) args) /* This function calls the profiling functions. */ extern void _dl_mcount_wrapper_check __P ((void *__selfpc)); |