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Community source repository for glibc add-on ports branch, master, updated. glibc-2.15-36-g92e4706
- From: jsm28 at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 8 Feb 2012 23:35:57 -0000
- Subject: Community source repository for glibc add-on ports branch, master, updated. glibc-2.15-36-g92e4706
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc-ports.git;a=commitdiff;h=92e47068b33040b59efdbedfbeedab1cba1e1e62
commit 92e47068b33040b59efdbedfbeedab1cba1e1e62
Author: Joseph Myers <joseph@codesourcery.com>
Date: Wed Feb 8 23:35:36 2012 +0000
Convert ARM to crti.S/crtn.S.
diff --git a/ChangeLog.arm b/ChangeLog.arm
index 62531a4..75c8f54 100644
--- a/ChangeLog.arm
+++ b/ChangeLog.arm
@@ -1,3 +1,11 @@
+2012-02-08 Joseph Myers <joseph@codesourcery.com>
+
+ * sysdeps/arm/crti.S, sysdeps/arm/crtn.S: New files, based on
+ compiler output for sysdeps/generic/initfini.c.
+ * sysdeps/arm/initfini.c: Remove file.
+ * sysdeps/arm/eabi/Makefile (CFLAGS-initfini.s)
+ (CFLAGS-pt-initfini.s): Remove variables.
+
2012-01-08 Joseph Myers <joseph@codesourcery.com>
* sysdeps/arm/eabi/bits/fenv.h: Use const instead of __const.
diff --git a/sysdeps/arm/initfini.c b/sysdeps/arm/crti.S
similarity index 57%
copy from sysdeps/arm/initfini.c
copy to sysdeps/arm/crti.S
index 659ee91..facb1e6 100644
--- a/sysdeps/arm/initfini.c
+++ b/sysdeps/arm/crti.S
@@ -1,5 +1,5 @@
-/* Special .init and .fini section support. ARM version.
- Copyright (C) 2006 Free Software Foundation, Inc.
+/* Special .init and .fini section support for ARM.
+ Copyright (C) 1995-2012 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
@@ -34,9 +34,61 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-/* Prevent this function from being inlined. Otherwise half of its
- constant pool will end up in crti and the other half in crtn. */
+/* crti.S puts a function prologue at the beginning of the .init and
+ .fini sections and defines global symbols for those addresses, so
+ they can be called as functions. The symbols _init and _fini are
+ magic and cause the linker to emit DT_INIT and DT_FINI. */
-static void call_gmon_start (void) __attribute__((noinline));
+#include <libc-symbols.h>
+#include <sysdep.h>
-#include <sysdeps/generic/initfini.c>
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+ weak_extern (PREINIT_FUNCTION)
+#else
+ .hidden PREINIT_FUNCTION
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+ .p2align 2
+ .type call_weak_fn, %function
+call_weak_fn:
+ ldr r3, .LGOT
+ ldr r2, .LGOT+4
+.LPIC:
+ add r3, pc, r3
+ ldr r2, [r3, r2]
+ cmp r2, #0
+ bxeq lr
+ b PREINIT_FUNCTION
+ .p2align 2
+.LGOT:
+ .word _GLOBAL_OFFSET_TABLE_-(.LPIC+8)
+ .word PREINIT_FUNCTION(GOT)
+#endif
+
+ .section .init,"ax",%progbits
+ .p2align 2
+ .globl _init
+ .type _init, %function
+_init:
+ stmfd sp!, {r3, lr}
+#if PREINIT_FUNCTION_WEAK
+ bl call_weak_fn
+#else
+ bl PREINIT_FUNCTION
+#endif
+
+ .section .fini,"ax",%progbits
+ .p2align 2
+ .globl _fini
+ .type _fini, %function
+_fini:
+ stmfd sp!, {r3, lr}
diff --git a/sysdeps/arm/initfini.c b/sysdeps/arm/crtn.S
similarity index 78%
rename from sysdeps/arm/initfini.c
rename to sysdeps/arm/crtn.S
index 659ee91..18be5cc 100644
--- a/sysdeps/arm/initfini.c
+++ b/sysdeps/arm/crtn.S
@@ -1,5 +1,5 @@
-/* Special .init and .fini section support. ARM version.
- Copyright (C) 2006 Free Software Foundation, Inc.
+/* Special .init and .fini section support for ARM.
+ Copyright (C) 1995-2012 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
@@ -34,9 +34,23 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-/* Prevent this function from being inlined. Otherwise half of its
- constant pool will end up in crti and the other half in crtn. */
-
-static void call_gmon_start (void) __attribute__((noinline));
-
-#include <sysdeps/generic/initfini.c>
+#include <sysdep.h>
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+ corresponding to the prologues in crti.S. */
+
+ .section .init,"ax",%progbits
+#ifdef __ARM_ARCH_4T__
+ ldmfd sp!, {r3, lr}
+ bx lr
+#else
+ ldmfd sp!, {r3, pc}
+#endif
+
+ .section .fini,"ax",%progbits
+#ifdef __ARM_ARCH_4T__
+ ldmfd sp!, {r3, lr}
+ bx lr
+#else
+ ldmfd sp!, {r3, pc}
+#endif
diff --git a/sysdeps/arm/eabi/Makefile b/sysdeps/arm/eabi/Makefile
index 20572d4..025465a 100644
--- a/sysdeps/arm/eabi/Makefile
+++ b/sysdeps/arm/eabi/Makefile
@@ -3,7 +3,6 @@ aeabi_constants = aeabi_lcsts aeabi_sighandlers aeabi_math
aeabi_routines = aeabi_assert aeabi_localeconv aeabi_errno_addr \
aeabi_mb_cur_max aeabi_atexit aeabi_memclr aeabi_memcpy \
aeabi_memmove aeabi_memset
-CFLAGS-initfini.s += -fno-asynchronous-unwind-tables -fno-unwind-tables
sysdep_routines += $(aeabi_constants) $(aeabi_routines)
static-only-routines += $(aeabi_constants)
@@ -29,7 +28,3 @@ endif
ifeq ($(subdir),math)
$(objpfx)libm.so: $(elfobjdir)/ld.so
endif
-
-ifeq ($(subdir),nptl)
-CFLAGS-pt-initfini.s += -fno-asynchronous-unwind-tables -fno-unwind-tables
-endif
-----------------------------------------------------------------------
Summary of changes:
ChangeLog.arm | 8 +++++
sysdeps/{m68k => arm}/crti.S | 53 +++++++++++++++++++++--------------
sysdeps/arm/{initfini.c => crtn.S} | 30 +++++++++++++++-----
sysdeps/arm/eabi/Makefile | 5 ---
4 files changed, 62 insertions(+), 34 deletions(-)
copy sysdeps/{m68k => arm}/crti.S (78%)
rename sysdeps/arm/{initfini.c => crtn.S} (78%)
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