[OE-core] [PATCH] gcc: Include patch scheduled for GCC 4.8.3 to fix epilogue on ARM
Martin Jansa
martin.jansa at gmail.com
Fri Jan 31 17:26:33 UTC 2014
On Fri, Jan 31, 2014 at 10:45:17AM +0100, Holger Hans Peter Freyther wrote:
> GCC 4.8.0, 4.8.1 and 4.8.2 can generate broken epilogues for the
> ABI used by the kernel. Apply the patch that is included for GCC
> 4.8.3 from http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854.
>
> The issue was found on Yocto/Dora and the patch should be backported
> to this branch. A kernel built with Dora's GCC 4.8.1 misbehaved on:
>
> while true;
> do
> (for i in `seq 1 100`;
> do
> echo "Log message... $RANDOM";
> done) | logger;
> done
>
> busybox's syslogd would from time to read a huge negative value and
> then exit, strace would get stuck waiting on a syscall. After this
> patch it appears to work better.
>
> Signed-off-by: Holger Hans Peter Freyther <holger at moiji-mobile.com>
> ---
> meta/recipes-devtools/gcc/gcc-4.8.inc | 1 +
> .../0048-PR58854_fix_arm_apcs_epilogue.patch | 23 ++++++++++++++++++++++
> 2 files changed, 24 insertions(+)
> create mode 100644 meta/recipes-devtools/gcc/gcc-4.8/0048-PR58854_fix_arm_apcs_epilogue.patch
>
> diff --git a/meta/recipes-devtools/gcc/gcc-4.8.inc b/meta/recipes-devtools/gcc/gcc-4.8.inc
> index a140573..fdd0c12 100644
> --- a/meta/recipes-devtools/gcc/gcc-4.8.inc
> +++ b/meta/recipes-devtools/gcc/gcc-4.8.inc
> @@ -68,6 +68,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
> file://0045-gcc-4.8-PR57717-PowerPC-E500v2.patch \
> file://0046-libatomic-deptracking.patch \
> file://0047-repomembug.patch \
> + file://0048-PR58854_fix_arm_apcs_epilogue.patch \
You're not the first in this file, but please don't mix tabs and spaces
for indentation.
> "
> SRC_URI[md5sum] = "a3d7d63b9cb6b6ea049469a0c4a43c9d"
> SRC_URI[sha256sum] = "09dc2276c73424bbbfda1dbddc62bbbf900c9f185acf7f3e1d773ce2d7e3cdc8"
> diff --git a/meta/recipes-devtools/gcc/gcc-4.8/0048-PR58854_fix_arm_apcs_epilogue.patch b/meta/recipes-devtools/gcc/gcc-4.8/0048-PR58854_fix_arm_apcs_epilogue.patch
> new file mode 100644
> index 0000000..0ef245a
> --- /dev/null
> +++ b/meta/recipes-devtools/gcc/gcc-4.8/0048-PR58854_fix_arm_apcs_epilogue.patch
> @@ -0,0 +1,23 @@
> +Backport fix for PR target/58854
> +
> +2013-11-11 Ramana Radhakrishnan <ramana.radhakrishnan at arm.com>
> +
> + Backported from mainline
> + 2013-10-30 Ramana Radhakrishnan <ramana.radhakrishnan at arm.com>
> +
> + PR target/58854
> + * config/arm/arm.c (arm_expand_epilogue_apcs_frame): Emit blockage
> +
> +
> +Upstream-Status: Backport
> +
> +--- gcc-4_8-branch/gcc/config/arm/arm.c 2013/11/11 08:00:45 204664
> ++++ gcc-4_8-branch/gcc/config/arm/arm.c 2013/11/11 09:38:14 204665
> +@@ -23555,6 +23555,7 @@
> + num_regs = bit_count (saved_regs_mask);
> + if ((offsets->outgoing_args != (1 + num_regs)) || cfun->calls_alloca)
> + {
> ++ emit_insn (gen_blockage ());
> + /* Unwind the stack to just below the saved registers. */
> + emit_insn (gen_addsi3 (stack_pointer_rtx,
> + hard_frame_pointer_rtx,
> --
> 1.8.5.2
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core at lists.openembedded.org
> http://lists.openembedded.org/mailman/listinfo/openembedded-core
--
Martin 'JaMa' Jansa jabber: Martin.Jansa at gmail.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.openembedded.org/pipermail/openembedded-core/attachments/20140131/5d14187e/attachment-0002.sig>
More information about the Openembedded-core
mailing list