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authorHolger Hans Peter Freyther <holger@moiji-mobile.com>2014-02-14 10:40:57 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-02-14 12:27:46 +0000
commitacef5185492287b9569f7fbbc3e9570d688e9c9f (patch)
tree2d116620d51e7070853a9964b98550c4361b1ef8
parent7ee4d9e1b29a1c0a2552a008fc264c592ef5ae4a (diff)
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gcc: Include patch scheduled for GCC 4.8.3 to fix epilogue on ARM
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... $RANDOM"; done) | logger; done busybox's syslogd would from time to read a huge negative value and then exit, strace would get stuck waiting on a syscall. After this patch it appears to work better. (From OE-Core master rev: 3004eb3b7ee5fd8dfe9c4e5749b4e125d0bd4b59) Signed-off-by: Holger Hans Peter Freyther <holger@moiji-mobile.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-devtools/gcc/gcc-4.8.inc1
-rw-r--r--meta/recipes-devtools/gcc/gcc-4.8/0048-PR58854_fix_arm_apcs_epilogue.patch23
2 files changed, 24 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.8.inc b/meta/recipes-devtools/gcc/gcc-4.8.inc
index b34c7ae3c4..f1260af3a3 100644
--- a/meta/recipes-devtools/gcc/gcc-4.8.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.8.inc
@@ -78,6 +78,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
file://0046-libatomic-deptracking.patch \
file://0047-repomembug.patch \
file://0048-PR57532.patch \
+ file://0048-PR58854_fix_arm_apcs_epilogue.patch \
"
SRC_URI[md5sum] = "3b2386c114cd74185aa3754b58a79304"
SRC_URI[sha256sum] = "545b44be3ad9f2c4e90e6880f5c9d4f0a8f0e5f67e1ffb0d45da9fa01bb05813"
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 0000000000..0ef245a17f
--- /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@arm.com>
+
+ Backported from mainline
+ 2013-10-30 Ramana Radhakrishnan <ramana.radhakrishnan@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,