* patch to make init_array work
@ 2002-10-22 18:46 David Mosberger
0 siblings, 0 replies; only message in thread
From: David Mosberger @ 2002-10-22 18:46 UTC (permalink / raw)
To: libc-hacker; +Cc: hjl, davidm
The init_array support in glibc appears to be incomplete at the
moment. HJ had a patch that made it all work (see
http://sources.redhat.com/ml/libc-alpha/2002-03/msg00047.html) and I
adapted his work for the current CVS tree. With the patch below
applied, the included test cases work properly.
Please apply this patch.
Thanks,
--david
2002-03-12 H.J. Lu <hjl@gnu.org>
* csu/init.c (__libc_preinit_array): New. Define if
HAVE_INITFINI_ARRAY is defined.
(__libc_init_array): Likewise.
(__libc_fini_array): Likewise.
* elf/Makefile (tests): Add tst-array1, tst-array2 and
tst-array3 if $(have-initfini-array) is yes.
(tests-static): Add tst-array3 if $(have-initfini-array) is
yes.
(modules-names): Add tst-array2dep if $(have-initfini-array)
is yes.
($(objpfx)tst-array1.out): New target.
($(objpfx)tst-array2): Likewise.
($(objpfx)tst-array2.out): Likewise.
($(objpfx)tst-array3.out): Likewise.
* elf/tst-array1.c: New file.
* elf/tst-array1.exp: Likewise.
* elf/tst-array2.c: Likewise.
* elf/tst-array2dep.c: Likewise.
* elf/tst-array2.exp: Likewise.
* elf/tst-array3.c: Likewise.
* sysdeps/generic/libc-start.c (__libc_start_main): Process
__libc_preinit_array, __libc_init_array and __libc_fini_array
if HAVE_INITFINI_ARRAY is defined.
Index: csu/init.c
===================================================================
RCS file: /cvs/glibc/libc/csu/init.c,v
retrieving revision 1.4
diff -u -r1.4 init.c
--- csu/csu/init.c 6 Jul 2001 04:54:45 -0000 1.4
+++ csu/csu/init.c 23 Oct 2002 01:34:29 -0000
@@ -25,3 +25,43 @@
const int _IO_stdin_used = _G_IO_IO_FILE_VERSION;
#endif
+
+#ifdef HAVE_INITFINI_ARRAY
+extern void (*__preinit_array_start []) (void);
+extern void (*__preinit_array_end []) (void);
+
+void
+__libc_preinit_array (void)
+{
+ unsigned int size, i;
+
+ size = __preinit_array_end - __preinit_array_start;
+ for (i = 0; i < size; i++)
+ __preinit_array_start [i] ();
+}
+
+extern void (*__init_array_start []) (void);
+extern void (*__init_array_end []) (void);
+
+void
+__libc_init_array (void)
+{
+ unsigned int size, i;
+
+ size = __init_array_end - __init_array_start;
+ for (i = 0; i < size; i++)
+ __init_array_start [i] ();
+}
+
+extern void (*__fini_array_start []) (void);
+extern void (*__fini_array_end []) (void);
+
+void
+__libc_fini_array (void)
+{
+ int i;
+
+ for (i = __fini_array_end - __fini_array_start - 1; i >= 0; i--)
+ __fini_array_start [i] ();
+}
+#endif
Index: elf/Makefile
===================================================================
RCS file: /cvs/glibc/libc/elf/Makefile,v
retrieving revision 1.241
diff -u -r1.241 Makefile
--- elf/elf/Makefile 22 Oct 2002 06:22:38 -0000 1.241
+++ elf/elf/Makefile 23 Oct 2002 01:34:29 -0000
@@ -117,6 +117,9 @@
endif
tests = tst-tls1 tst-tls2 tst-tls9
+ifeq (yes,$(have-initfini-array))
+tests += tst-array1 tst-array2 tst-array3
+endif
ifeq (yes,$(build-static))
tests-static = tst-tls1-static tst-tls2-static
ifeq (yesyesyes,$(build-static)$(build-shared)$(elf))
@@ -156,6 +159,9 @@
tst-tlsmod5 tst-tlsmod6 \
circlemod1 circlemod1a circlemod2 circlemod2a \
circlemod3 circlemod3a
+ifeq (yes,$(have-initfini-array))
+modules-names += tst-array2dep
+endif
modules-vis-yes = vismod1 vismod2 vismod3
modules-nodelete-yes = nodelmod1 nodelmod2 nodelmod3 nodelmod4
modules-nodlopen-yes = nodlopenmod nodlopenmod2
@@ -541,3 +547,22 @@
$(objpfx)tst-tls9-static: $(common-objpfx)dlfcn/libdl.a
$(objpfx)tst-tls9-static.out: $(objpfx)tst-tlsmod5.so $(objpfx)tst-tlsmod6.so
endif
+
+$(objpfx)tst-array1.out: $(objpfx)tst-array1
+ $(elf-objpfx)$(rtld-installed-name) \
+ --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
+ $(objpfx)tst-array1 > $@
+ cmp $@ tst-array1.exp > /dev/null
+
+$(objpfx)tst-array2: $(objpfx)tst-array2dep.so
+$(objpfx)tst-array2.out: $(objpfx)tst-array2
+ $(elf-objpfx)$(rtld-installed-name) \
+ --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
+ $(objpfx)tst-array2 > $@
+ cmp $@ tst-array2.exp > /dev/null
+
+$(objpfx)tst-array3.out: $(objpfx)tst-array3
+ $(elf-objpfx)$(rtld-installed-name) \
+ --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
+ $(objpfx)tst-array3 > $@
+ cmp $@ tst-array1.exp > /dev/null
Index: elf/tst-array1.c
===================================================================
RCS file: elf/tst-array1.c
diff -N elf/tst-array1.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array1.c 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1,101 @@
+#include <unistd.h>
+
+static void init (void) __attribute__ ((constructor));
+
+static void
+init (void)
+{
+ write (STDOUT_FILENO, "init\n", 5);
+}
+
+static void fini (void) __attribute__ ((destructor));
+
+static void
+fini (void)
+{
+ write (STDOUT_FILENO, "fini\n", 5);
+}
+
+static void
+preinit_0 (void)
+{
+ write (STDOUT_FILENO, "preinit array 0\n", 16);
+}
+
+static void
+preinit_1 (void)
+{
+ write (STDOUT_FILENO, "preinit array 1\n", 16);
+}
+
+static void
+preinit_2 (void)
+{
+ write (STDOUT_FILENO, "preinit array 2\n", 16);
+}
+
+void
+(*preinit_array []) (void) __attribute__ ((section (".preinit_array"))) =
+{
+ &preinit_0,
+ &preinit_1,
+ &preinit_2
+};
+
+static void
+init_0 (void)
+{
+ write (STDOUT_FILENO, "init array 0\n", 13);
+}
+
+static void
+init_1 (void)
+{
+ write (STDOUT_FILENO, "init array 1\n", 13);
+}
+
+static void
+init_2 (void)
+{
+ write (STDOUT_FILENO, "init array 2\n", 13);
+}
+
+void
+(*init_array []) (void) __attribute__ ((section (".init_array"))) =
+{
+ &init_0,
+ &init_1,
+ &init_2
+};
+
+static void
+fini_0 (void)
+{
+ write (STDOUT_FILENO, "fini array 0\n", 13);
+}
+
+static void
+fini_1 (void)
+{
+ write (STDOUT_FILENO, "fini array 1\n", 13);
+}
+
+static void
+fini_2 (void)
+{
+ write (STDOUT_FILENO, "fini array 2\n", 13);
+}
+
+void
+(*fini_array []) (void) __attribute__ ((section (".fini_array"))) =
+{
+ &fini_0,
+ &fini_1,
+ &fini_2
+};
+
+int
+main (void)
+{
+ return 0;
+}
Index: elf/tst-array1.exp
===================================================================
RCS file: elf/tst-array1.exp
diff -N elf/tst-array1.exp
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array1.exp 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1,11 @@
+preinit array 0
+preinit array 1
+preinit array 2
+init
+init array 0
+init array 1
+init array 2
+fini array 2
+fini array 1
+fini array 0
+fini
Index: elf/tst-array2.c
===================================================================
RCS file: elf/tst-array2.c
diff -N elf/tst-array2.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array2.c 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1 @@
+#include "tst-array1.c"
Index: elf/tst-array2.exp
===================================================================
RCS file: elf/tst-array2.exp
diff -N elf/tst-array2.exp
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array2.exp 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1,19 @@
+preinit array 0
+preinit array 1
+preinit array 2
+DSO init
+DSO init array 0
+DSO init array 1
+DSO init array 2
+init
+init array 0
+init array 1
+init array 2
+fini array 2
+fini array 1
+fini array 0
+fini
+DSO fini array 2
+DSO fini array 1
+DSO fini array 0
+DSO fini
Index: elf/tst-array2dep.c
===================================================================
RCS file: elf/tst-array2dep.c
diff -N elf/tst-array2dep.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array2dep.c 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1,69 @@
+#include <unistd.h>
+
+static void init (void) __attribute__ ((constructor));
+
+static void
+init (void)
+{
+ write (STDOUT_FILENO, "DSO init\n", 9);
+}
+
+static void fini (void) __attribute__ ((destructor));
+
+static void
+fini (void)
+{
+ write (STDOUT_FILENO, "DSO fini\n", 9);
+}
+
+static void
+init_0 (void)
+{
+ write (STDOUT_FILENO, "DSO init array 0\n", 17);
+}
+
+static void
+init_1 (void)
+{
+ write (STDOUT_FILENO, "DSO init array 1\n", 17);
+}
+
+static void
+init_2 (void)
+{
+ write (STDOUT_FILENO, "DSO init array 2\n", 17);
+}
+
+void
+(*init_array []) (void) __attribute__ ((section (".init_array"))) =
+{
+ &init_0,
+ &init_1,
+ &init_2
+};
+
+static void
+fini_0 (void)
+{
+ write (STDOUT_FILENO, "DSO fini array 0\n", 17);
+}
+
+static void
+fini_1 (void)
+{
+ write (STDOUT_FILENO, "DSO fini array 1\n", 17);
+}
+
+static void
+fini_2 (void)
+{
+ write (STDOUT_FILENO, "DSO fini array 2\n", 17);
+}
+
+void
+(*fini_array []) (void) __attribute__ ((section (".fini_array"))) =
+{
+ &fini_0,
+ &fini_1,
+ &fini_2
+};
Index: elf/tst-array3.c
===================================================================
RCS file: elf/tst-array3.c
diff -N elf/tst-array3.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elf/elf/tst-array3.c 23 Oct 2002 01:34:29 -0000
@@ -0,0 +1 @@
+#include "tst-array1.c"
Index: sysdeps/generic/libc-start.c
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/generic/libc-start.c,v
retrieving revision 1.31
diff -u -r1.31 libc-start.c
--- sysdeps/generic/sysdeps/generic/libc-start.c 15 Sep 2002 05:44:24 -0000 1.31
+++ sysdeps/generic/sysdeps/generic/libc-start.c 23 Oct 2002 01:34:30 -0000
@@ -38,6 +38,16 @@
;
#endif
+#ifdef HAVE_INITFINI_ARRAY
+# ifdef SHARED
+extern void __libc_init_array (void) __attribute__ ((weak));
+extern void __libc_fini_array (void) __attribute__ ((weak));
+# else
+extern void __libc_preinit_array (void);
+extern void __libc_init_array (void);
+extern void __libc_fini_array (void);
+# endif
+#endif
extern int BP_SYM (__libc_start_main) (int (*main) (int, char **, char **),
int argc,
@@ -122,6 +132,17 @@
if (fini)
__cxa_atexit ((void (*) (void *)) fini, NULL, NULL);
+#ifdef HAVE_INITFINI_ARRAY
+# ifdef SHARED
+ if (__libc_fini_array)
+# endif
+ __cxa_atexit ((void (*) (void *)) __libc_fini_array, NULL, NULL);
+
+# ifndef SHARED
+ __libc_preinit_array ();
+# endif
+#endif
+
/* Call the initializer of the program, if any. */
#ifdef SHARED
if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0))
@@ -129,6 +150,13 @@
#endif
if (init)
(*init) ();
+
+#ifdef HAVE_INITFINI_ARRAY
+# ifdef SHARED
+ if (__libc_init_array)
+# endif
+ __libc_init_array ();
+#endif
#ifdef SHARED
if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_IMPCALLS, 0))
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2002-10-22 18:46 patch to make init_array work David Mosberger
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