[oe] [PATCH] gcc: backport 4.3.x atomic-patches series from openembedded-dev
Koen Kooi
k.kooi at student.utwente.nl
Tue Jul 20 08:06:26 UTC 2010
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 19-07-10 16:58, heinold at inf.fu-berlin.de wrote:
> From: Henning Heinold <h.heinold at tarent.de>
I haven't tried this on stable, but it works good enough on .dev:
Acked-by: Koen Kooi <koen at openembedded.org>
>
> ---
> recipes/gcc/gcc-4.3.1.inc | 4 +-
> .../gcc-4.3.1/debian/armel-atomic-builtins.dpatch | 350 ++++++++++++++++++++
> ...90519-arm-eabi-atomic-builtins-unbreak-v2.patch | 52 +++
> recipes/gcc/gcc-4.3.2.inc | 4 +-
> .../gcc-4.3.2/debian/armel-atomic-builtins.dpatch | 350 ++++++++++++++++++++
> ...90519-arm-eabi-atomic-builtins-unbreak-v2.patch | 52 +++
> recipes/gcc/gcc-4.3.3.inc | 2 +
> .../gcc-4.3.3/debian/armel-atomic-builtins.dpatch | 350 ++++++++++++++++++++
> ...90519-arm-eabi-atomic-builtins-unbreak-v2.patch | 52 +++
> recipes/gcc/gcc-cross-sdk_4.3.1.bb | 2 +-
> recipes/gcc/gcc-cross-sdk_4.3.2.bb | 2 +-
> recipes/gcc/gcc-cross-sdk_4.3.3.bb | 2 +-
> recipes/gcc/gcc-cross_4.3.1.bb | 2 +-
> recipes/gcc/gcc-cross_4.3.2.bb | 2 +-
> recipes/gcc/gcc-cross_4.3.3.bb | 2 +-
> recipes/gcc/gcc_4.3.1.bb | 2 +-
> recipes/gcc/gcc_4.3.2.bb | 2 +-
> recipes/gcc/gcc_4.3.3.bb | 2 +-
> 18 files changed, 1223 insertions(+), 11 deletions(-)
> create mode 100644 recipes/gcc/gcc-4.3.1/debian/armel-atomic-builtins.dpatch
> create mode 100644 recipes/gcc/gcc-4.3.1/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> create mode 100644 recipes/gcc/gcc-4.3.2/debian/armel-atomic-builtins.dpatch
> create mode 100644 recipes/gcc/gcc-4.3.2/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> create mode 100644 recipes/gcc/gcc-4.3.3/debian/armel-atomic-builtins.dpatch
> create mode 100644 recipes/gcc/gcc-4.3.3/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
>
> diff --git a/recipes/gcc/gcc-4.3.1.inc b/recipes/gcc/gcc-4.3.1.inc
> index 132bbe7..0c74889 100644
> --- a/recipes/gcc/gcc-4.3.1.inc
> +++ b/recipes/gcc/gcc-4.3.1.inc
> @@ -21,7 +21,8 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://fedora/gcc43-libgomp-speedup.patch;patch=1;pnum=0 \
> file://fedora/gcc43-i386-libgomp.patch;patch=1;pnum=0 \
> file://fedora/gcc43-rh251682.patch;patch=1;pnum=0 \
> - file://debian/arm-unbreak-eabi-armv4t.dpatch;patch=1 \
> + file://debian/arm-unbreak-eabi-armv4t.dpatch;patch=1 \
> + file://debian/armel-atomic-builtins.dpatch;patch=1;pnum=0 \
> file://debian/libstdc++-pic.dpatch;patch=1;pnum=0 \
> file://debian/gcc-ice-hack.dpatch;patch=1;pnum=0 \
> file://debian/pr30961.dpatch;patch=1;pnum=0 \
> @@ -60,6 +61,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://gcc-4.3.1-ARCH_FLAGS_FOR_TARGET.patch;patch=1 \
> file://zecke-xgcc-cpp.patch;patch=1 \
> file://gcc-flags-for-build.patch;patch=1 \
> + file://gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch;patch=1 \
> "
>
> SRC_URI_append_sh3 = " file://sh3-installfix-fixheaders.patch;patch=1 "
> diff --git a/recipes/gcc/gcc-4.3.1/debian/armel-atomic-builtins.dpatch b/recipes/gcc/gcc-4.3.1/debian/armel-atomic-builtins.dpatch
> new file mode 100644
> index 0000000..f514375
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.1/debian/armel-atomic-builtins.dpatch
> @@ -0,0 +1,350 @@
> +#! /bin/sh -e
> +
> +# DP: Atomic builtins using kernel helpers for ARM Linux/EABI.
> +
> +dir=
> +if [ $# -eq 3 -a "$2" = '-d' ]; then
> + pdir="-d $3"
> + dir="$3/"
> +elif [ $# -ne 1 ]; then
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +fi
> +case "$1" in
> + -patch)
> + patch $pdir -f --no-backup-if-mismatch -p0 < $0
> + ;;
> + -unpatch)
> + patch $pdir -f --no-backup-if-mismatch -R -p0 < $0
> + ;;
> + *)
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +esac
> +exit 0
> +
> +This patch implements the atomic builtins described at:
> +
> + http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Atomic-Builtins.html
> +
> +for ARM EABI Linux. This implementation uses the kernel helpers
> +__kernel_cmpxchg and __kernel_dmb, and so should work on any
> +architecture which supports those. (More-efficient versions are possible
> +using ldrex/strex on architectures >=v6, but those are not written yet.)
> +
> +Atomic operations are provided for data sizes of 1, 2 and 4 bytes (but
> +not 8 bytes). The implementation uses actual functions
> +(__sync_fetch_and_add_2, etc.) rather than expanding code inline.
> +
> +Tested with cross to arm-none-linux-gnueabi, and with some additional
> +hand-written tests which hopefully exercised the atomicity of the
> +operations sufficiently.
> +
> +OK for mainline?
> +
> +Julian
> +
> +ChangeLog
> +
> + gcc/
> + * config/arm/t-linux-eabi (LIB2FUNCS_STATIC_EXTRA): Add
> + config/arm/linux-atomic.c.
> + * config/arm/linux-atomic.c: New.
> +
> +Index: gcc/config/arm/linux-atomic.c
> +===================================================================
> +--- gcc/config/arm/linux-atomic.c (revision 0)
> ++++ gcc/config/arm/linux-atomic.c (revision 0)
> +@@ -0,0 +1,280 @@
> ++/* Linux-specific atomic operations for ARM EABI.
> ++ Copyright (C) 2008 Free Software Foundation, Inc.
> ++ Contributed by CodeSourcery.
> ++
> ++This file is part of GCC.
> ++
> ++GCC is free software; you can redistribute it and/or modify it under
> ++the terms of the GNU General Public License as published by the Free
> ++Software Foundation; either version 2, or (at your option) any later
> ++version.
> ++
> ++In addition to the permissions in the GNU General Public License, the
> ++Free Software Foundation gives you unlimited permission to link the
> ++compiled version of this file into combinations with other programs,
> ++and to distribute those combinations without any restriction coming
> ++from the use of this file. (The General Public License restrictions
> ++do apply in other respects; for example, they cover modification of
> ++the file, and distribution when not linked into a combine
> ++executable.)
> ++
> ++GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> ++WARRANTY; without even the implied warranty of MERCHANTABILITY or
> ++FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> ++for more details.
> ++
> ++You should have received a copy of the GNU General Public License
> ++along with GCC; see the file COPYING. If not, write to the Free
> ++Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
> ++02110-1301, USA. */
> ++
> ++/* Kernel helper for compare-and-exchange. */
> ++typedef int (__kernel_cmpxchg_t) (int oldval, int newval, int *ptr);
> ++#define __kernel_cmpxchg (*(__kernel_cmpxchg_t *) 0xffff0fc0)
> ++
> ++/* Kernel helper for memory barrier. */
> ++typedef void (__kernel_dmb_t) (void);
> ++#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
> ++
> ++/* Note: we implement byte, short and int versions of atomic operations using
> ++ the above kernel helpers, but there is no support for "long long" (64-bit)
> ++ operations as yet. */
> ++
> ++#define HIDDEN __attribute__ ((visibility ("hidden")))
> ++
> ++#ifdef __ARMEL__
> ++#define INVERT_MASK_1 0
> ++#define INVERT_MASK_2 0
> ++#else
> ++#define INVERT_MASK_1 24
> ++#define INVERT_MASK_2 16
> ++#endif
> ++
> ++#define MASK_1 0xffu
> ++#define MASK_2 0xffffu
> ++
> ++#define FETCH_AND_OP_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_fetch_and_##OP##_4 (int *ptr, int val) \
> ++ { \
> ++ int failure, tmp; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return tmp; \
> ++ }
> ++
> ++FETCH_AND_OP_WORD (add, , +)
> ++FETCH_AND_OP_WORD (sub, , -)
> ++FETCH_AND_OP_WORD (or, , |)
> ++FETCH_AND_OP_WORD (and, , &)
> ++FETCH_AND_OP_WORD (xor, , ^)
> ++FETCH_AND_OP_WORD (nand, ~, &)
> ++
> ++#define NAME_oldval(OP, WIDTH) __sync_fetch_and_##OP##_##WIDTH
> ++#define NAME_newval(OP, WIDTH) __sync_##OP##_and_fetch_##WIDTH
> ++
> ++/* Implement both __sync_<op>_and_fetch and __sync_fetch_and_<op> for
> ++ subword-sized quantities. */
> ++
> ++#define SUBWORD_SYNC_OP(OP, PFX_OP, INF_OP, TYPE, WIDTH, RETURN) \
> ++ TYPE HIDDEN \
> ++ NAME##_##RETURN (OP, WIDTH) (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ unsigned int mask, shift, oldval, newval; \
> ++ int failure; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = ((PFX_OP ((oldval & mask) >> shift) \
> ++ INF_OP (unsigned int) val) << shift) & mask; \
> ++ newval |= oldval & ~mask; \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (RETURN & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, oldval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, oldval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, oldval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, oldval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, oldval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, oldval)
> ++
> ++#define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_##OP##_and_fetch_4 (int *ptr, int val) \
> ++ { \
> ++ int tmp, failure; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return PFX_OP tmp INF_OP val; \
> ++ }
> ++
> ++OP_AND_FETCH_WORD (add, , +)
> ++OP_AND_FETCH_WORD (sub, , -)
> ++OP_AND_FETCH_WORD (or, , |)
> ++OP_AND_FETCH_WORD (and, , &)
> ++OP_AND_FETCH_WORD (xor, , ^)
> ++OP_AND_FETCH_WORD (nand, ~, &)
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, newval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, newval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, newval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, newval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, newval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, newval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, newval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, newval)
> ++
> ++int HIDDEN
> ++__sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int actual_oldval, fail;
> ++
> ++ while (1)
> ++ {
> ++ actual_oldval = *ptr;
> ++
> ++ if (oldval != actual_oldval)
> ++ return actual_oldval;
> ++
> ++ fail = __kernel_cmpxchg (actual_oldval, newval, ptr);
> ++
> ++ if (!fail)
> ++ return oldval;
> ++ }
> ++}
> ++
> ++#define SUBWORD_VAL_CAS(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_val_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ int *wordptr = (int *)((unsigned int) ptr & ~3), fail; \
> ++ unsigned int mask, shift, actual_oldval, actual_newval; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ while (1) \
> ++ { \
> ++ actual_oldval = *wordptr; \
> ++ \
> ++ if (((actual_oldval & mask) >> shift) != (unsigned int) oldval) \
> ++ return (actual_oldval & mask) >> shift; \
> ++ \
> ++ actual_newval = (actual_oldval & ~mask) \
> ++ | (((unsigned int) newval << shift) & mask); \
> ++ \
> ++ fail = __kernel_cmpxchg (actual_oldval, actual_newval, \
> ++ wordptr); \
> ++ \
> ++ if (!fail) \
> ++ return oldval; \
> ++ } \
> ++ }
> ++
> ++SUBWORD_VAL_CAS (short, 2)
> ++SUBWORD_VAL_CAS (char, 1)
> ++
> ++typedef unsigned char bool;
> ++
> ++bool HIDDEN
> ++__sync_bool_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int failure = __kernel_cmpxchg (oldval, newval, ptr);
> ++ return (failure == 0);
> ++}
> ++
> ++#define SUBWORD_BOOL_CAS(TYPE, WIDTH) \
> ++ bool HIDDEN \
> ++ __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ TYPE actual_oldval \
> ++ = __sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval); \
> ++ return (oldval == actual_oldval); \
> ++ }
> ++
> ++SUBWORD_BOOL_CAS (short, 2)
> ++SUBWORD_BOOL_CAS (char, 1)
> ++
> ++void HIDDEN
> ++__sync_synchronize (void)
> ++{
> ++ __kernel_dmb ();
> ++}
> ++
> ++int HIDDEN
> ++__sync_lock_test_and_set_4 (int *ptr, int val)
> ++{
> ++ int failure, oldval;
> ++
> ++ do {
> ++ oldval = *ptr;
> ++ failure = __kernel_cmpxchg (oldval, val, ptr);
> ++ } while (failure != 0);
> ++
> ++ return oldval;
> ++}
> ++
> ++#define SUBWORD_TEST_AND_SET(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_lock_test_and_set_##WIDTH (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int failure; \
> ++ unsigned int oldval, newval, shift, mask; \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = (oldval & ~mask) \
> ++ | (((unsigned int) val << shift) & mask); \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (oldval & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_TEST_AND_SET (short, 2)
> ++SUBWORD_TEST_AND_SET (char, 1)
> ++
> ++#define SYNC_LOCK_RELEASE(TYPE, WIDTH) \
> ++ void HIDDEN \
> ++ __sync_lock_release_##WIDTH (TYPE *ptr) \
> ++ { \
> ++ *ptr = 0; \
> ++ __kernel_dmb (); \
> ++ }
> ++
> ++SYNC_LOCK_RELEASE (int, 4)
> ++SYNC_LOCK_RELEASE (short, 2)
> ++SYNC_LOCK_RELEASE (char, 1)
> +Index: gcc/config/arm/t-linux-eabi
> +===================================================================
> +--- gcc/config/arm/t-linux-eabi (revision 136167)
> ++++ gcc/config/arm/t-linux-eabi (working copy)
> +@@ -12,3 +12,5 @@ LIB1ASMFUNCS := $(filter-out _dvmd_tls,$
> + # Multilib the standard Linux files. Don't include crti.o or crtn.o,
> + # which are provided by glibc.
> + EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
> ++
> ++LIB2FUNCS_STATIC_EXTRA += $(srcdir)/config/arm/linux-atomic.c
> +
> +
> diff --git a/recipes/gcc/gcc-4.3.1/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch b/recipes/gcc/gcc-4.3.1/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> new file mode 100644
> index 0000000..6849d46
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.1/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> @@ -0,0 +1,52 @@
> +--- gcc-4.4-20090519/gcc/config/arm/linux-eabi.h.~1~ 2007-11-08 14:44:09.000000000 +0100
> ++++ gcc-4.4-20090519/gcc/config/arm/linux-eabi.h 2009-05-22 20:38:51.000000000 +0200
> +@@ -72,6 +72,49 @@
> + do not use -lfloat. */
> + #undef LIBGCC_SPEC
> +
> ++/* Some symbols are only in the static libgcc. Override REAL_LIBGCC_SPEC
> ++ to always pass -lgcc to the linker, even for --shared-libgcc, otherwise
> ++ shared libraries break. */
> ++#ifdef ENABLE_SHARED_LIBGCC
> ++
> ++#ifndef USE_LD_AS_NEEDED
> ++#define USE_LD_AS_NEEDED 0
> ++#endif
> ++
> ++#if USE_LD_AS_NEEDED
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared-libgcc:-lgcc --as-needed -lgcc_s --no-as-needed} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared: \
> ++ %{!shared-libgcc:-lgcc -lgcc_eh} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}"
> ++#endif
> ++
> ++#ifdef LINK_EH_SPEC
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared: \
> ++ %{!shared-libgcc:-lgcc} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#endif
> ++
> ++#define REAL_LIBGCC_SPEC " \
> ++ %{static|static-libgcc:-lgcc -lgcc_eh} \
> ++ %{!static:%{!static-libgcc: \
> ++ "REAL_LIBGCC_SPEC_1" \
> ++ "REAL_LIBGCC_SPEC_2" \
> ++ }}"
> ++
> ++#else /* !ENABLE_SHARED_LIBGCC */
> ++
> ++#define REAL_LIBGCC_SPEC " -lgcc "
> ++
> ++#endif /* !ENABLE_SHARED_LIBGCC */
> ++
> + /* Clear the instruction cache from `beg' to `end'. This makes an
> + inline system call to SYS_cacheflush. */
> + #undef CLEAR_INSN_CACHE
> diff --git a/recipes/gcc/gcc-4.3.2.inc b/recipes/gcc/gcc-4.3.2.inc
> index e053ba2..cae16e5 100644
> --- a/recipes/gcc/gcc-4.3.2.inc
> +++ b/recipes/gcc/gcc-4.3.2.inc
> @@ -21,7 +21,8 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://fedora/gcc43-libgomp-speedup.patch;patch=1;pnum=0 \
> file://fedora/gcc43-i386-libgomp.patch;patch=1;pnum=0 \
> file://fedora/gcc43-rh251682.patch;patch=1;pnum=0 \
> - file://debian/arm-unbreak-eabi-armv4t.dpatch;patch=1 \
> + file://debian/arm-unbreak-eabi-armv4t.dpatch;patch=1 \
> + file://debian/armel-atomic-builtins.dpatch;patch=1;pnum=0 \
> file://debian/libstdc++-pic.dpatch;patch=1;pnum=0 \
> file://debian/gcc-ice-hack.dpatch;patch=1;pnum=0 \
> file://debian/pr30961.dpatch;patch=1;pnum=0 \
> @@ -56,6 +57,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://gcc-4.3.1-ARCH_FLAGS_FOR_TARGET.patch;patch=1 \
> file://zecke-xgcc-cpp.patch;patch=1 \
> file://gcc-flags-for-build.patch;patch=1 \
> + file://gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch;patch=1 \
> "
>
> SRC_URI_append_sh3 = " file://sh3-installfix-fixheaders.patch;patch=1 "
> diff --git a/recipes/gcc/gcc-4.3.2/debian/armel-atomic-builtins.dpatch b/recipes/gcc/gcc-4.3.2/debian/armel-atomic-builtins.dpatch
> new file mode 100644
> index 0000000..f514375
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.2/debian/armel-atomic-builtins.dpatch
> @@ -0,0 +1,350 @@
> +#! /bin/sh -e
> +
> +# DP: Atomic builtins using kernel helpers for ARM Linux/EABI.
> +
> +dir=
> +if [ $# -eq 3 -a "$2" = '-d' ]; then
> + pdir="-d $3"
> + dir="$3/"
> +elif [ $# -ne 1 ]; then
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +fi
> +case "$1" in
> + -patch)
> + patch $pdir -f --no-backup-if-mismatch -p0 < $0
> + ;;
> + -unpatch)
> + patch $pdir -f --no-backup-if-mismatch -R -p0 < $0
> + ;;
> + *)
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +esac
> +exit 0
> +
> +This patch implements the atomic builtins described at:
> +
> + http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Atomic-Builtins.html
> +
> +for ARM EABI Linux. This implementation uses the kernel helpers
> +__kernel_cmpxchg and __kernel_dmb, and so should work on any
> +architecture which supports those. (More-efficient versions are possible
> +using ldrex/strex on architectures >=v6, but those are not written yet.)
> +
> +Atomic operations are provided for data sizes of 1, 2 and 4 bytes (but
> +not 8 bytes). The implementation uses actual functions
> +(__sync_fetch_and_add_2, etc.) rather than expanding code inline.
> +
> +Tested with cross to arm-none-linux-gnueabi, and with some additional
> +hand-written tests which hopefully exercised the atomicity of the
> +operations sufficiently.
> +
> +OK for mainline?
> +
> +Julian
> +
> +ChangeLog
> +
> + gcc/
> + * config/arm/t-linux-eabi (LIB2FUNCS_STATIC_EXTRA): Add
> + config/arm/linux-atomic.c.
> + * config/arm/linux-atomic.c: New.
> +
> +Index: gcc/config/arm/linux-atomic.c
> +===================================================================
> +--- gcc/config/arm/linux-atomic.c (revision 0)
> ++++ gcc/config/arm/linux-atomic.c (revision 0)
> +@@ -0,0 +1,280 @@
> ++/* Linux-specific atomic operations for ARM EABI.
> ++ Copyright (C) 2008 Free Software Foundation, Inc.
> ++ Contributed by CodeSourcery.
> ++
> ++This file is part of GCC.
> ++
> ++GCC is free software; you can redistribute it and/or modify it under
> ++the terms of the GNU General Public License as published by the Free
> ++Software Foundation; either version 2, or (at your option) any later
> ++version.
> ++
> ++In addition to the permissions in the GNU General Public License, the
> ++Free Software Foundation gives you unlimited permission to link the
> ++compiled version of this file into combinations with other programs,
> ++and to distribute those combinations without any restriction coming
> ++from the use of this file. (The General Public License restrictions
> ++do apply in other respects; for example, they cover modification of
> ++the file, and distribution when not linked into a combine
> ++executable.)
> ++
> ++GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> ++WARRANTY; without even the implied warranty of MERCHANTABILITY or
> ++FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> ++for more details.
> ++
> ++You should have received a copy of the GNU General Public License
> ++along with GCC; see the file COPYING. If not, write to the Free
> ++Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
> ++02110-1301, USA. */
> ++
> ++/* Kernel helper for compare-and-exchange. */
> ++typedef int (__kernel_cmpxchg_t) (int oldval, int newval, int *ptr);
> ++#define __kernel_cmpxchg (*(__kernel_cmpxchg_t *) 0xffff0fc0)
> ++
> ++/* Kernel helper for memory barrier. */
> ++typedef void (__kernel_dmb_t) (void);
> ++#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
> ++
> ++/* Note: we implement byte, short and int versions of atomic operations using
> ++ the above kernel helpers, but there is no support for "long long" (64-bit)
> ++ operations as yet. */
> ++
> ++#define HIDDEN __attribute__ ((visibility ("hidden")))
> ++
> ++#ifdef __ARMEL__
> ++#define INVERT_MASK_1 0
> ++#define INVERT_MASK_2 0
> ++#else
> ++#define INVERT_MASK_1 24
> ++#define INVERT_MASK_2 16
> ++#endif
> ++
> ++#define MASK_1 0xffu
> ++#define MASK_2 0xffffu
> ++
> ++#define FETCH_AND_OP_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_fetch_and_##OP##_4 (int *ptr, int val) \
> ++ { \
> ++ int failure, tmp; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return tmp; \
> ++ }
> ++
> ++FETCH_AND_OP_WORD (add, , +)
> ++FETCH_AND_OP_WORD (sub, , -)
> ++FETCH_AND_OP_WORD (or, , |)
> ++FETCH_AND_OP_WORD (and, , &)
> ++FETCH_AND_OP_WORD (xor, , ^)
> ++FETCH_AND_OP_WORD (nand, ~, &)
> ++
> ++#define NAME_oldval(OP, WIDTH) __sync_fetch_and_##OP##_##WIDTH
> ++#define NAME_newval(OP, WIDTH) __sync_##OP##_and_fetch_##WIDTH
> ++
> ++/* Implement both __sync_<op>_and_fetch and __sync_fetch_and_<op> for
> ++ subword-sized quantities. */
> ++
> ++#define SUBWORD_SYNC_OP(OP, PFX_OP, INF_OP, TYPE, WIDTH, RETURN) \
> ++ TYPE HIDDEN \
> ++ NAME##_##RETURN (OP, WIDTH) (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ unsigned int mask, shift, oldval, newval; \
> ++ int failure; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = ((PFX_OP ((oldval & mask) >> shift) \
> ++ INF_OP (unsigned int) val) << shift) & mask; \
> ++ newval |= oldval & ~mask; \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (RETURN & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, oldval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, oldval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, oldval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, oldval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, oldval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, oldval)
> ++
> ++#define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_##OP##_and_fetch_4 (int *ptr, int val) \
> ++ { \
> ++ int tmp, failure; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return PFX_OP tmp INF_OP val; \
> ++ }
> ++
> ++OP_AND_FETCH_WORD (add, , +)
> ++OP_AND_FETCH_WORD (sub, , -)
> ++OP_AND_FETCH_WORD (or, , |)
> ++OP_AND_FETCH_WORD (and, , &)
> ++OP_AND_FETCH_WORD (xor, , ^)
> ++OP_AND_FETCH_WORD (nand, ~, &)
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, newval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, newval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, newval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, newval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, newval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, newval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, newval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, newval)
> ++
> ++int HIDDEN
> ++__sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int actual_oldval, fail;
> ++
> ++ while (1)
> ++ {
> ++ actual_oldval = *ptr;
> ++
> ++ if (oldval != actual_oldval)
> ++ return actual_oldval;
> ++
> ++ fail = __kernel_cmpxchg (actual_oldval, newval, ptr);
> ++
> ++ if (!fail)
> ++ return oldval;
> ++ }
> ++}
> ++
> ++#define SUBWORD_VAL_CAS(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_val_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ int *wordptr = (int *)((unsigned int) ptr & ~3), fail; \
> ++ unsigned int mask, shift, actual_oldval, actual_newval; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ while (1) \
> ++ { \
> ++ actual_oldval = *wordptr; \
> ++ \
> ++ if (((actual_oldval & mask) >> shift) != (unsigned int) oldval) \
> ++ return (actual_oldval & mask) >> shift; \
> ++ \
> ++ actual_newval = (actual_oldval & ~mask) \
> ++ | (((unsigned int) newval << shift) & mask); \
> ++ \
> ++ fail = __kernel_cmpxchg (actual_oldval, actual_newval, \
> ++ wordptr); \
> ++ \
> ++ if (!fail) \
> ++ return oldval; \
> ++ } \
> ++ }
> ++
> ++SUBWORD_VAL_CAS (short, 2)
> ++SUBWORD_VAL_CAS (char, 1)
> ++
> ++typedef unsigned char bool;
> ++
> ++bool HIDDEN
> ++__sync_bool_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int failure = __kernel_cmpxchg (oldval, newval, ptr);
> ++ return (failure == 0);
> ++}
> ++
> ++#define SUBWORD_BOOL_CAS(TYPE, WIDTH) \
> ++ bool HIDDEN \
> ++ __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ TYPE actual_oldval \
> ++ = __sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval); \
> ++ return (oldval == actual_oldval); \
> ++ }
> ++
> ++SUBWORD_BOOL_CAS (short, 2)
> ++SUBWORD_BOOL_CAS (char, 1)
> ++
> ++void HIDDEN
> ++__sync_synchronize (void)
> ++{
> ++ __kernel_dmb ();
> ++}
> ++
> ++int HIDDEN
> ++__sync_lock_test_and_set_4 (int *ptr, int val)
> ++{
> ++ int failure, oldval;
> ++
> ++ do {
> ++ oldval = *ptr;
> ++ failure = __kernel_cmpxchg (oldval, val, ptr);
> ++ } while (failure != 0);
> ++
> ++ return oldval;
> ++}
> ++
> ++#define SUBWORD_TEST_AND_SET(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_lock_test_and_set_##WIDTH (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int failure; \
> ++ unsigned int oldval, newval, shift, mask; \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = (oldval & ~mask) \
> ++ | (((unsigned int) val << shift) & mask); \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (oldval & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_TEST_AND_SET (short, 2)
> ++SUBWORD_TEST_AND_SET (char, 1)
> ++
> ++#define SYNC_LOCK_RELEASE(TYPE, WIDTH) \
> ++ void HIDDEN \
> ++ __sync_lock_release_##WIDTH (TYPE *ptr) \
> ++ { \
> ++ *ptr = 0; \
> ++ __kernel_dmb (); \
> ++ }
> ++
> ++SYNC_LOCK_RELEASE (int, 4)
> ++SYNC_LOCK_RELEASE (short, 2)
> ++SYNC_LOCK_RELEASE (char, 1)
> +Index: gcc/config/arm/t-linux-eabi
> +===================================================================
> +--- gcc/config/arm/t-linux-eabi (revision 136167)
> ++++ gcc/config/arm/t-linux-eabi (working copy)
> +@@ -12,3 +12,5 @@ LIB1ASMFUNCS := $(filter-out _dvmd_tls,$
> + # Multilib the standard Linux files. Don't include crti.o or crtn.o,
> + # which are provided by glibc.
> + EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
> ++
> ++LIB2FUNCS_STATIC_EXTRA += $(srcdir)/config/arm/linux-atomic.c
> +
> +
> diff --git a/recipes/gcc/gcc-4.3.2/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch b/recipes/gcc/gcc-4.3.2/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> new file mode 100644
> index 0000000..6849d46
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.2/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> @@ -0,0 +1,52 @@
> +--- gcc-4.4-20090519/gcc/config/arm/linux-eabi.h.~1~ 2007-11-08 14:44:09.000000000 +0100
> ++++ gcc-4.4-20090519/gcc/config/arm/linux-eabi.h 2009-05-22 20:38:51.000000000 +0200
> +@@ -72,6 +72,49 @@
> + do not use -lfloat. */
> + #undef LIBGCC_SPEC
> +
> ++/* Some symbols are only in the static libgcc. Override REAL_LIBGCC_SPEC
> ++ to always pass -lgcc to the linker, even for --shared-libgcc, otherwise
> ++ shared libraries break. */
> ++#ifdef ENABLE_SHARED_LIBGCC
> ++
> ++#ifndef USE_LD_AS_NEEDED
> ++#define USE_LD_AS_NEEDED 0
> ++#endif
> ++
> ++#if USE_LD_AS_NEEDED
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared-libgcc:-lgcc --as-needed -lgcc_s --no-as-needed} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared: \
> ++ %{!shared-libgcc:-lgcc -lgcc_eh} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}"
> ++#endif
> ++
> ++#ifdef LINK_EH_SPEC
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared: \
> ++ %{!shared-libgcc:-lgcc} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#endif
> ++
> ++#define REAL_LIBGCC_SPEC " \
> ++ %{static|static-libgcc:-lgcc -lgcc_eh} \
> ++ %{!static:%{!static-libgcc: \
> ++ "REAL_LIBGCC_SPEC_1" \
> ++ "REAL_LIBGCC_SPEC_2" \
> ++ }}"
> ++
> ++#else /* !ENABLE_SHARED_LIBGCC */
> ++
> ++#define REAL_LIBGCC_SPEC " -lgcc "
> ++
> ++#endif /* !ENABLE_SHARED_LIBGCC */
> ++
> + /* Clear the instruction cache from `beg' to `end'. This makes an
> + inline system call to SYS_cacheflush. */
> + #undef CLEAR_INSN_CACHE
> diff --git a/recipes/gcc/gcc-4.3.3.inc b/recipes/gcc/gcc-4.3.3.inc
> index 860c96c..cae16e5 100644
> --- a/recipes/gcc/gcc-4.3.3.inc
> +++ b/recipes/gcc/gcc-4.3.3.inc
> @@ -22,6 +22,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://fedora/gcc43-i386-libgomp.patch;patch=1;pnum=0 \
> file://fedora/gcc43-rh251682.patch;patch=1;pnum=0 \
> file://debian/arm-unbreak-eabi-armv4t.dpatch;patch=1 \
> + file://debian/armel-atomic-builtins.dpatch;patch=1;pnum=0 \
> file://debian/libstdc++-pic.dpatch;patch=1;pnum=0 \
> file://debian/gcc-ice-hack.dpatch;patch=1;pnum=0 \
> file://debian/pr30961.dpatch;patch=1;pnum=0 \
> @@ -56,6 +57,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://gcc-4.3.1-ARCH_FLAGS_FOR_TARGET.patch;patch=1 \
> file://zecke-xgcc-cpp.patch;patch=1 \
> file://gcc-flags-for-build.patch;patch=1 \
> + file://gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch;patch=1 \
> "
>
> SRC_URI_append_sh3 = " file://sh3-installfix-fixheaders.patch;patch=1 "
> diff --git a/recipes/gcc/gcc-4.3.3/debian/armel-atomic-builtins.dpatch b/recipes/gcc/gcc-4.3.3/debian/armel-atomic-builtins.dpatch
> new file mode 100644
> index 0000000..f514375
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.3/debian/armel-atomic-builtins.dpatch
> @@ -0,0 +1,350 @@
> +#! /bin/sh -e
> +
> +# DP: Atomic builtins using kernel helpers for ARM Linux/EABI.
> +
> +dir=
> +if [ $# -eq 3 -a "$2" = '-d' ]; then
> + pdir="-d $3"
> + dir="$3/"
> +elif [ $# -ne 1 ]; then
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +fi
> +case "$1" in
> + -patch)
> + patch $pdir -f --no-backup-if-mismatch -p0 < $0
> + ;;
> + -unpatch)
> + patch $pdir -f --no-backup-if-mismatch -R -p0 < $0
> + ;;
> + *)
> + echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
> + exit 1
> +esac
> +exit 0
> +
> +This patch implements the atomic builtins described at:
> +
> + http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Atomic-Builtins.html
> +
> +for ARM EABI Linux. This implementation uses the kernel helpers
> +__kernel_cmpxchg and __kernel_dmb, and so should work on any
> +architecture which supports those. (More-efficient versions are possible
> +using ldrex/strex on architectures >=v6, but those are not written yet.)
> +
> +Atomic operations are provided for data sizes of 1, 2 and 4 bytes (but
> +not 8 bytes). The implementation uses actual functions
> +(__sync_fetch_and_add_2, etc.) rather than expanding code inline.
> +
> +Tested with cross to arm-none-linux-gnueabi, and with some additional
> +hand-written tests which hopefully exercised the atomicity of the
> +operations sufficiently.
> +
> +OK for mainline?
> +
> +Julian
> +
> +ChangeLog
> +
> + gcc/
> + * config/arm/t-linux-eabi (LIB2FUNCS_STATIC_EXTRA): Add
> + config/arm/linux-atomic.c.
> + * config/arm/linux-atomic.c: New.
> +
> +Index: gcc/config/arm/linux-atomic.c
> +===================================================================
> +--- gcc/config/arm/linux-atomic.c (revision 0)
> ++++ gcc/config/arm/linux-atomic.c (revision 0)
> +@@ -0,0 +1,280 @@
> ++/* Linux-specific atomic operations for ARM EABI.
> ++ Copyright (C) 2008 Free Software Foundation, Inc.
> ++ Contributed by CodeSourcery.
> ++
> ++This file is part of GCC.
> ++
> ++GCC is free software; you can redistribute it and/or modify it under
> ++the terms of the GNU General Public License as published by the Free
> ++Software Foundation; either version 2, or (at your option) any later
> ++version.
> ++
> ++In addition to the permissions in the GNU General Public License, the
> ++Free Software Foundation gives you unlimited permission to link the
> ++compiled version of this file into combinations with other programs,
> ++and to distribute those combinations without any restriction coming
> ++from the use of this file. (The General Public License restrictions
> ++do apply in other respects; for example, they cover modification of
> ++the file, and distribution when not linked into a combine
> ++executable.)
> ++
> ++GCC is distributed in the hope that it will be useful, but WITHOUT ANY
> ++WARRANTY; without even the implied warranty of MERCHANTABILITY or
> ++FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> ++for more details.
> ++
> ++You should have received a copy of the GNU General Public License
> ++along with GCC; see the file COPYING. If not, write to the Free
> ++Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
> ++02110-1301, USA. */
> ++
> ++/* Kernel helper for compare-and-exchange. */
> ++typedef int (__kernel_cmpxchg_t) (int oldval, int newval, int *ptr);
> ++#define __kernel_cmpxchg (*(__kernel_cmpxchg_t *) 0xffff0fc0)
> ++
> ++/* Kernel helper for memory barrier. */
> ++typedef void (__kernel_dmb_t) (void);
> ++#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
> ++
> ++/* Note: we implement byte, short and int versions of atomic operations using
> ++ the above kernel helpers, but there is no support for "long long" (64-bit)
> ++ operations as yet. */
> ++
> ++#define HIDDEN __attribute__ ((visibility ("hidden")))
> ++
> ++#ifdef __ARMEL__
> ++#define INVERT_MASK_1 0
> ++#define INVERT_MASK_2 0
> ++#else
> ++#define INVERT_MASK_1 24
> ++#define INVERT_MASK_2 16
> ++#endif
> ++
> ++#define MASK_1 0xffu
> ++#define MASK_2 0xffffu
> ++
> ++#define FETCH_AND_OP_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_fetch_and_##OP##_4 (int *ptr, int val) \
> ++ { \
> ++ int failure, tmp; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return tmp; \
> ++ }
> ++
> ++FETCH_AND_OP_WORD (add, , +)
> ++FETCH_AND_OP_WORD (sub, , -)
> ++FETCH_AND_OP_WORD (or, , |)
> ++FETCH_AND_OP_WORD (and, , &)
> ++FETCH_AND_OP_WORD (xor, , ^)
> ++FETCH_AND_OP_WORD (nand, ~, &)
> ++
> ++#define NAME_oldval(OP, WIDTH) __sync_fetch_and_##OP##_##WIDTH
> ++#define NAME_newval(OP, WIDTH) __sync_##OP##_and_fetch_##WIDTH
> ++
> ++/* Implement both __sync_<op>_and_fetch and __sync_fetch_and_<op> for
> ++ subword-sized quantities. */
> ++
> ++#define SUBWORD_SYNC_OP(OP, PFX_OP, INF_OP, TYPE, WIDTH, RETURN) \
> ++ TYPE HIDDEN \
> ++ NAME##_##RETURN (OP, WIDTH) (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ unsigned int mask, shift, oldval, newval; \
> ++ int failure; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = ((PFX_OP ((oldval & mask) >> shift) \
> ++ INF_OP (unsigned int) val) << shift) & mask; \
> ++ newval |= oldval & ~mask; \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (RETURN & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, oldval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, oldval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, oldval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, oldval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, oldval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, oldval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, oldval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, oldval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, oldval)
> ++
> ++#define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP) \
> ++ int HIDDEN \
> ++ __sync_##OP##_and_fetch_4 (int *ptr, int val) \
> ++ { \
> ++ int tmp, failure; \
> ++ \
> ++ do { \
> ++ tmp = *ptr; \
> ++ failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return PFX_OP tmp INF_OP val; \
> ++ }
> ++
> ++OP_AND_FETCH_WORD (add, , +)
> ++OP_AND_FETCH_WORD (sub, , -)
> ++OP_AND_FETCH_WORD (or, , |)
> ++OP_AND_FETCH_WORD (and, , &)
> ++OP_AND_FETCH_WORD (xor, , ^)
> ++OP_AND_FETCH_WORD (nand, ~, &)
> ++
> ++SUBWORD_SYNC_OP (add, , +, short, 2, newval)
> ++SUBWORD_SYNC_OP (sub, , -, short, 2, newval)
> ++SUBWORD_SYNC_OP (or, , |, short, 2, newval)
> ++SUBWORD_SYNC_OP (and, , &, short, 2, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, short, 2, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, short, 2, newval)
> ++
> ++SUBWORD_SYNC_OP (add, , +, char, 1, newval)
> ++SUBWORD_SYNC_OP (sub, , -, char, 1, newval)
> ++SUBWORD_SYNC_OP (or, , |, char, 1, newval)
> ++SUBWORD_SYNC_OP (and, , &, char, 1, newval)
> ++SUBWORD_SYNC_OP (xor, , ^, char, 1, newval)
> ++SUBWORD_SYNC_OP (nand, ~, &, char, 1, newval)
> ++
> ++int HIDDEN
> ++__sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int actual_oldval, fail;
> ++
> ++ while (1)
> ++ {
> ++ actual_oldval = *ptr;
> ++
> ++ if (oldval != actual_oldval)
> ++ return actual_oldval;
> ++
> ++ fail = __kernel_cmpxchg (actual_oldval, newval, ptr);
> ++
> ++ if (!fail)
> ++ return oldval;
> ++ }
> ++}
> ++
> ++#define SUBWORD_VAL_CAS(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_val_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ int *wordptr = (int *)((unsigned int) ptr & ~3), fail; \
> ++ unsigned int mask, shift, actual_oldval, actual_newval; \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ while (1) \
> ++ { \
> ++ actual_oldval = *wordptr; \
> ++ \
> ++ if (((actual_oldval & mask) >> shift) != (unsigned int) oldval) \
> ++ return (actual_oldval & mask) >> shift; \
> ++ \
> ++ actual_newval = (actual_oldval & ~mask) \
> ++ | (((unsigned int) newval << shift) & mask); \
> ++ \
> ++ fail = __kernel_cmpxchg (actual_oldval, actual_newval, \
> ++ wordptr); \
> ++ \
> ++ if (!fail) \
> ++ return oldval; \
> ++ } \
> ++ }
> ++
> ++SUBWORD_VAL_CAS (short, 2)
> ++SUBWORD_VAL_CAS (char, 1)
> ++
> ++typedef unsigned char bool;
> ++
> ++bool HIDDEN
> ++__sync_bool_compare_and_swap_4 (int *ptr, int oldval, int newval)
> ++{
> ++ int failure = __kernel_cmpxchg (oldval, newval, ptr);
> ++ return (failure == 0);
> ++}
> ++
> ++#define SUBWORD_BOOL_CAS(TYPE, WIDTH) \
> ++ bool HIDDEN \
> ++ __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \
> ++ TYPE newval) \
> ++ { \
> ++ TYPE actual_oldval \
> ++ = __sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval); \
> ++ return (oldval == actual_oldval); \
> ++ }
> ++
> ++SUBWORD_BOOL_CAS (short, 2)
> ++SUBWORD_BOOL_CAS (char, 1)
> ++
> ++void HIDDEN
> ++__sync_synchronize (void)
> ++{
> ++ __kernel_dmb ();
> ++}
> ++
> ++int HIDDEN
> ++__sync_lock_test_and_set_4 (int *ptr, int val)
> ++{
> ++ int failure, oldval;
> ++
> ++ do {
> ++ oldval = *ptr;
> ++ failure = __kernel_cmpxchg (oldval, val, ptr);
> ++ } while (failure != 0);
> ++
> ++ return oldval;
> ++}
> ++
> ++#define SUBWORD_TEST_AND_SET(TYPE, WIDTH) \
> ++ TYPE HIDDEN \
> ++ __sync_lock_test_and_set_##WIDTH (TYPE *ptr, TYPE val) \
> ++ { \
> ++ int failure; \
> ++ unsigned int oldval, newval, shift, mask; \
> ++ int *wordptr = (int *) ((unsigned int) ptr & ~3); \
> ++ \
> ++ shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
> ++ mask = MASK_##WIDTH << shift; \
> ++ \
> ++ do { \
> ++ oldval = *wordptr; \
> ++ newval = (oldval & ~mask) \
> ++ | (((unsigned int) val << shift) & mask); \
> ++ failure = __kernel_cmpxchg (oldval, newval, wordptr); \
> ++ } while (failure != 0); \
> ++ \
> ++ return (oldval & mask) >> shift; \
> ++ }
> ++
> ++SUBWORD_TEST_AND_SET (short, 2)
> ++SUBWORD_TEST_AND_SET (char, 1)
> ++
> ++#define SYNC_LOCK_RELEASE(TYPE, WIDTH) \
> ++ void HIDDEN \
> ++ __sync_lock_release_##WIDTH (TYPE *ptr) \
> ++ { \
> ++ *ptr = 0; \
> ++ __kernel_dmb (); \
> ++ }
> ++
> ++SYNC_LOCK_RELEASE (int, 4)
> ++SYNC_LOCK_RELEASE (short, 2)
> ++SYNC_LOCK_RELEASE (char, 1)
> +Index: gcc/config/arm/t-linux-eabi
> +===================================================================
> +--- gcc/config/arm/t-linux-eabi (revision 136167)
> ++++ gcc/config/arm/t-linux-eabi (working copy)
> +@@ -12,3 +12,5 @@ LIB1ASMFUNCS := $(filter-out _dvmd_tls,$
> + # Multilib the standard Linux files. Don't include crti.o or crtn.o,
> + # which are provided by glibc.
> + EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
> ++
> ++LIB2FUNCS_STATIC_EXTRA += $(srcdir)/config/arm/linux-atomic.c
> +
> +
> diff --git a/recipes/gcc/gcc-4.3.3/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch b/recipes/gcc/gcc-4.3.3/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> new file mode 100644
> index 0000000..6849d46
> --- /dev/null
> +++ b/recipes/gcc/gcc-4.3.3/gcc-4.4-20090519-arm-eabi-atomic-builtins-unbreak-v2.patch
> @@ -0,0 +1,52 @@
> +--- gcc-4.4-20090519/gcc/config/arm/linux-eabi.h.~1~ 2007-11-08 14:44:09.000000000 +0100
> ++++ gcc-4.4-20090519/gcc/config/arm/linux-eabi.h 2009-05-22 20:38:51.000000000 +0200
> +@@ -72,6 +72,49 @@
> + do not use -lfloat. */
> + #undef LIBGCC_SPEC
> +
> ++/* Some symbols are only in the static libgcc. Override REAL_LIBGCC_SPEC
> ++ to always pass -lgcc to the linker, even for --shared-libgcc, otherwise
> ++ shared libraries break. */
> ++#ifdef ENABLE_SHARED_LIBGCC
> ++
> ++#ifndef USE_LD_AS_NEEDED
> ++#define USE_LD_AS_NEEDED 0
> ++#endif
> ++
> ++#if USE_LD_AS_NEEDED
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared-libgcc:-lgcc --as-needed -lgcc_s --no-as-needed} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_1 "\
> ++ %{!shared: \
> ++ %{!shared-libgcc:-lgcc -lgcc_eh} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}"
> ++#endif
> ++
> ++#ifdef LINK_EH_SPEC
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared: \
> ++ %{!shared-libgcc:-lgcc} \
> ++ %{shared-libgcc:-lgcc_s -lgcc}}" /* always append -lgcc */
> ++#else
> ++#define REAL_LIBGCC_SPEC_2 "\
> ++ %{shared:-lgcc_s -lgcc}" /* always append -lgcc */
> ++#endif
> ++
> ++#define REAL_LIBGCC_SPEC " \
> ++ %{static|static-libgcc:-lgcc -lgcc_eh} \
> ++ %{!static:%{!static-libgcc: \
> ++ "REAL_LIBGCC_SPEC_1" \
> ++ "REAL_LIBGCC_SPEC_2" \
> ++ }}"
> ++
> ++#else /* !ENABLE_SHARED_LIBGCC */
> ++
> ++#define REAL_LIBGCC_SPEC " -lgcc "
> ++
> ++#endif /* !ENABLE_SHARED_LIBGCC */
> ++
> + /* Clear the instruction cache from `beg' to `end'. This makes an
> + inline system call to SYS_cacheflush. */
> + #undef CLEAR_INSN_CACHE
> diff --git a/recipes/gcc/gcc-cross-sdk_4.3.1.bb b/recipes/gcc/gcc-cross-sdk_4.3.1.bb
> index 876c65c..45557b6 100644
> --- a/recipes/gcc/gcc-cross-sdk_4.3.1.bb
> +++ b/recipes/gcc/gcc-cross-sdk_4.3.1.bb
> @@ -1,4 +1,4 @@
> -PR = "r14"
> +PR = "r15"
>
> inherit sdk
>
> diff --git a/recipes/gcc/gcc-cross-sdk_4.3.2.bb b/recipes/gcc/gcc-cross-sdk_4.3.2.bb
> index ee4ce85..297bd8e 100644
> --- a/recipes/gcc/gcc-cross-sdk_4.3.2.bb
> +++ b/recipes/gcc/gcc-cross-sdk_4.3.2.bb
> @@ -1,4 +1,4 @@
> -PR = "r6"
> +PR = "r7"
>
> inherit sdk
>
> diff --git a/recipes/gcc/gcc-cross-sdk_4.3.3.bb b/recipes/gcc/gcc-cross-sdk_4.3.3.bb
> index 7f3e146..7e3a459 100644
> --- a/recipes/gcc/gcc-cross-sdk_4.3.3.bb
> +++ b/recipes/gcc/gcc-cross-sdk_4.3.3.bb
> @@ -1,4 +1,4 @@
> -PR = "r2"
> +PR = "r3"
>
> inherit sdk
>
> diff --git a/recipes/gcc/gcc-cross_4.3.1.bb b/recipes/gcc/gcc-cross_4.3.1.bb
> index a6ebecb..2764039 100644
> --- a/recipes/gcc/gcc-cross_4.3.1.bb
> +++ b/recipes/gcc/gcc-cross_4.3.1.bb
> @@ -1,4 +1,4 @@
> -PR = "r17"
> +PR = "r18"
>
> require gcc-${PV}.inc
> require gcc-cross4.inc
> diff --git a/recipes/gcc/gcc-cross_4.3.2.bb b/recipes/gcc/gcc-cross_4.3.2.bb
> index 9f1ffed..598da3c 100644
> --- a/recipes/gcc/gcc-cross_4.3.2.bb
> +++ b/recipes/gcc/gcc-cross_4.3.2.bb
> @@ -1,4 +1,4 @@
> -PR = "r6"
> +PR = "r8"
> require gcc-${PV}.inc
> require gcc-cross4.inc
> require gcc-configure-cross.inc
> diff --git a/recipes/gcc/gcc-cross_4.3.3.bb b/recipes/gcc/gcc-cross_4.3.3.bb
> index 2ae54d6..d6abff2 100644
> --- a/recipes/gcc/gcc-cross_4.3.3.bb
> +++ b/recipes/gcc/gcc-cross_4.3.3.bb
> @@ -1,4 +1,4 @@
> -PR = "r0"
> +PR = "r2"
> require gcc-${PV}.inc
> require gcc-cross4.inc
> require gcc-configure-cross.inc
> diff --git a/recipes/gcc/gcc_4.3.1.bb b/recipes/gcc/gcc_4.3.1.bb
> index 3c29714..af35244 100644
> --- a/recipes/gcc/gcc_4.3.1.bb
> +++ b/recipes/gcc/gcc_4.3.1.bb
> @@ -1,4 +1,4 @@
> -PR = "r11"
> +PR = "r12"
>
> require gcc-${PV}.inc
> require gcc-configure-target.inc
> diff --git a/recipes/gcc/gcc_4.3.2.bb b/recipes/gcc/gcc_4.3.2.bb
> index e2c6e48..fddf437 100644
> --- a/recipes/gcc/gcc_4.3.2.bb
> +++ b/recipes/gcc/gcc_4.3.2.bb
> @@ -1,4 +1,4 @@
> -PR = "r4"
> +PR = "r5"
> require gcc-${PV}.inc
> require gcc-configure-target.inc
> require gcc-package-target.inc
> diff --git a/recipes/gcc/gcc_4.3.3.bb b/recipes/gcc/gcc_4.3.3.bb
> index 55725b0..83ebff7 100644
> --- a/recipes/gcc/gcc_4.3.3.bb
> +++ b/recipes/gcc/gcc_4.3.3.bb
> @@ -1,4 +1,4 @@
> -PR = "r0"
> +PR = "r1"
> require gcc-${PV}.inc
> require gcc-configure-target.inc
> require gcc-package-target.inc
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