aboutsummaryrefslogtreecommitdiff
path: root/stdlib
diff options
context:
space:
mode:
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/Makefile13
-rw-r--r--stdlib/Versions4
-rw-r--r--stdlib/atexit.c75
-rw-r--r--stdlib/cxa_atexit.c55
-rw-r--r--stdlib/old_atexit.c8
5 files changed, 90 insertions, 65 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index 6faa1c5..193c42b 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -29,7 +29,7 @@ routines := \
abort \
bsearch qsort msort \
getenv putenv setenv secure-getenv \
- exit on_exit atexit cxa_atexit cxa_finalize \
+ exit on_exit atexit cxa_atexit cxa_finalize old_atexit \
abs labs llabs \
div ldiv lldiv \
mblen mbstowcs mbtowc wcstombs wctomb \
@@ -49,6 +49,11 @@ routines := \
strtoimax strtoumax wcstoimax wcstoumax \
getcontext setcontext makecontext swapcontext
+# These routines will be omitted from the libc shared object.
+# Instead the static object files will be included in a special archive
+# linked against when the shared library will be used.
+static-only-routines = atexit
+
distribute := exit.h grouping.h abort-instr.h isomac.c tst-fmtmsg.sh
test-srcs := tst-fmtmsg
tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
@@ -81,6 +86,10 @@ CFLAGS-strfmon.c = -D_IO_MTSAFE_IO
CFLAGS-strfmon_l.c = -D_IO_MTSAFE_IO
endif
+ifeq (yes,$(have-protected))
+CFLAGS-atexit.c = -DHAVE_DOT_HIDDEN
+endif
+
include ../Rules
@@ -141,7 +150,7 @@ test-canon-ARGS = --test-dir=${common-objpfx}stdlib
tst-strtod-ENV = LOCPATH=$(common-objpfx)localedata
# Run a test on the header files we use.
-tests: $(objpfx)isomac.out
+tests: $(objpfx)isomac.out
ifeq (no,$(cross-compiling))
tests: $(objpfx)tst-fmtmsg.out
diff --git a/stdlib/Versions b/stdlib/Versions
index 034125a..c13ef27 100644
--- a/stdlib/Versions
+++ b/stdlib/Versions
@@ -94,4 +94,8 @@ libc {
# used by new G++ ABI
__cxa_atexit; __cxa_finalize;
}
+ GLIBC_2.2.3 {
+ # Used by atexit in libc_nonshared.
+ __new_exitfn;
+ }
}
diff --git a/stdlib/atexit.c b/stdlib/atexit.c
index e9648d6..19a1575 100644
--- a/stdlib/atexit.c
+++ b/stdlib/atexit.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1996, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1996, 1999, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -16,75 +16,24 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-#include <bits/libc-lock.h>
#include <stdlib.h>
#include "exit.h"
+/* This is defined by newer gcc version unique for each module. */
+extern void *__dso_handle __attribute__ ((__weak__));
+
+
/* Register FUNC to be executed by `exit'. */
int
atexit (void (*func) (void))
{
- struct exit_function *new = __new_exitfn ();
-
- if (new == NULL)
- return -1;
-
- new->flavor = ef_at;
- new->func.at = func;
- return 0;
+ return __cxa_atexit ((void (*) (void *)) func, NULL,
+ &__dso_handle == NULL ? NULL : __dso_handle);
}
-
-/* We change global data, so we need locking. */
-__libc_lock_define_initialized (static, lock)
-
-
-static struct exit_function_list initial;
-struct exit_function_list *__exit_funcs = &initial;
-
-struct exit_function *
-__new_exitfn (void)
-{
- struct exit_function_list *l;
- size_t i = 0;
-
- __libc_lock_lock (lock);
-
- for (l = __exit_funcs; l != NULL; l = l->next)
- {
- for (i = 0; i < l->idx; ++i)
- if (l->fns[i].flavor == ef_free)
- break;
- if (i < l->idx)
- break;
-
- if (l->idx < sizeof (l->fns) / sizeof (l->fns[0]))
- {
- i = l->idx++;
- break;
- }
- }
-
- if (l == NULL)
- {
- l = (struct exit_function_list *)
- malloc (sizeof (struct exit_function_list));
- if (l != NULL)
- {
- l->next = __exit_funcs;
- __exit_funcs = l;
-
- l->idx = 1;
- i = 0;
- }
- }
-
- /* Mark entry as used, but we don't know the flavor now. */
- if (l != NULL)
- l->fns[i].flavor = ef_us;
-
- __libc_lock_unlock (lock);
-
- return l == NULL ? NULL : &l->fns[i];
-}
+/* Hide the symbol so that no definition but the one locally in the
+ executable or DSO is used. */
+#ifdef HAVE_DOT_HIDDEN
+asm (".hidden\tatexit");
+#endif
diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
index e07d0ed..f602b7a 100644
--- a/stdlib/cxa_atexit.c
+++ b/stdlib/cxa_atexit.c
@@ -16,6 +16,7 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#include <bits/libc-lock.h>
#include <stdlib.h>
#include "exit.h"
@@ -36,3 +37,57 @@ __cxa_atexit (void (*func) (void *), void *arg, void *d)
new->func.cxa.dso_handle = d;
return 0;
}
+
+
+/* We change global data, so we need locking. */
+__libc_lock_define_initialized (static, lock)
+
+
+static struct exit_function_list initial;
+struct exit_function_list *__exit_funcs = &initial;
+
+struct exit_function *
+__new_exitfn (void)
+{
+ struct exit_function_list *l;
+ size_t i = 0;
+
+ __libc_lock_lock (lock);
+
+ for (l = __exit_funcs; l != NULL; l = l->next)
+ {
+ for (i = 0; i < l->idx; ++i)
+ if (l->fns[i].flavor == ef_free)
+ break;
+ if (i < l->idx)
+ break;
+
+ if (l->idx < sizeof (l->fns) / sizeof (l->fns[0]))
+ {
+ i = l->idx++;
+ break;
+ }
+ }
+
+ if (l == NULL)
+ {
+ l = (struct exit_function_list *)
+ malloc (sizeof (struct exit_function_list));
+ if (l != NULL)
+ {
+ l->next = __exit_funcs;
+ __exit_funcs = l;
+
+ l->idx = 1;
+ i = 0;
+ }
+ }
+
+ /* Mark entry as used, but we don't know the flavor now. */
+ if (l != NULL)
+ l->fns[i].flavor = ef_us;
+
+ __libc_lock_unlock (lock);
+
+ return l == NULL ? NULL : &l->fns[i];
+}
diff --git a/stdlib/old_atexit.c b/stdlib/old_atexit.c
new file mode 100644
index 0000000..45f330b
--- /dev/null
+++ b/stdlib/old_atexit.c
@@ -0,0 +1,8 @@
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2_2)
+# define atexit __dyn_atexit
+# include "atexit.c"
+# undef atexit
+compat_symbol (libc, __dyn_atexit, atexit, GLIBC_2_0);
+#endif