From: Leon Woestenberg Date: Mon, 26 Oct 2009 09:03:32 +0000 (+0100) Subject: ppc/85xx: Fix crashes due to generation of SPE instruction X-Git-Tag: v2009.11-rc1~7^2~12 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=da0e5f7ee828f246d85997486fff308837069453;p=oweals%2Fu-boot.git 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 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 Signed-off-by: Kumar Gala --- diff --git a/cpu/mpc85xx/config.mk b/cpu/mpc85xx/config.mk index beb3514e86..84651b87d8 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