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authorLeon Woestenberg <leon.woestenberg@gmail.com>2009-10-26 10:03:32 +0100
committerKumar Gala <galak@kernel.crashing.org>2009-10-26 21:35:45 -0500
commitda0e5f7ee828f246d85997486fff308837069453 (patch)
tree53a2d7afcfa6f0bdfab6380d8934b668aa795884
parent654ea1f3184235694306ddc5874baa27ad3018fe (diff)
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ppc/85xx: Fix crashes due to generation of SPE instruction
U-Boot crashed on the last instruction: int parse_stream_outer(struct in_str *inp, int flag) { effa4784: 94 21 ff 38 stwu r1,-200(r1) effa4788: 7c 08 02 a6 mflr r0 effa478c: 42 9f 00 05 bcl- 20,4*cr7+so,effa4790 <parse_stream_outer+0xc> effa4790: 7d 80 00 26 mfcr r12 effa4794: 13 c1 b3 21 evstdd r30,176(r1) ...which is a SPE instruction, although -mno-spe was used. tmp/cross/ppce500v2/bin/powerpc-angstrom-linux-gnuspe-gcc --version powerpc-angstrom-linux-gnuspe-gcc (GCC) 4.3.3 Seems to be a known issue (since 2008-04?!) Googled some, turns out this patch/workaround works for me on MPC8536DS. See http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00311.html for more info Signed-off-by: Leon Woestenberg <leon@sidebranch.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--cpu/mpc85xx/config.mk5
1 files changed, 5 insertions, 0 deletions
diff --git a/cpu/mpc85xx/config.mk b/cpu/mpc85xx/config.mk
index beb3514..84651b8 100644
--- a/cpu/mpc85xx/config.mk
+++ b/cpu/mpc85xx/config.mk
@@ -24,6 +24,11 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
PLATFORM_CPPFLAGS += -ffixed-r2 -Wa,-me500 -msoft-float -mno-string
+
+# -mspe=yes is needed to have -mno-spe accepted by a buggy GCC;
+# see "[PATCH,rs6000] make -mno-spe work as expected" on
+# http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00311.html
+PLATFORM_CPPFLAGS +=$(call cc-option,-mspe=yes)
PLATFORM_CPPFLAGS +=$(call cc-option,-mno-spe)
# Use default linker script. Board port can override in board/*/config.mk