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| author | Aaron Durbin <adurbin@chromium.org> | 2013-10-10 12:44:11 -0500 |
|---|---|---|
| committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-08-25 23:33:20 +0200 |
| commit | 8414d3c0b407d9afc6a2446dba3ca358da2c7bb6 (patch) | |
| tree | 58ec86e36aaae70fc41a3bdd760e70fd9501a8e2 /util/xcompile | |
| parent | 9518b56ab079f4c12eefe83cc9b4fa24b413ebe8 (diff) | |
| download | coreboot-8414d3c0b407d9afc6a2446dba3ca358da2c7bb6.tar.xz | |
xcompile: always use -march=i686
When compiling coreboot for x86 on gcc the compiler is
free to pick whatever defaults it is using at the time of
gcc's compile/configuration when no -march is specified.
Not properly specifying -march then opens up the use of SSE
instructions for compilation units it should not be used such
as the SMM module as this module doesn't save/restore SSE
registers.
Change-Id: I64d4a6c5fa9fadb4b35bc7097458e992a094dcba
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/172640
Reviewed-by: Stefan Reinauer <reinauer@google.com>
(cherry picked from commit d49358f7959bb52c3e7ff67d37c21a1b294adf72)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6716
Tested-by: build bot (Jenkins)
Diffstat (limited to 'util/xcompile')
| -rwxr-xr-x | util/xcompile/xcompile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/util/xcompile/xcompile b/util/xcompile/xcompile index 01d75bf337..4b18942be2 100755 --- a/util/xcompile/xcompile +++ b/util/xcompile/xcompile @@ -138,6 +138,11 @@ detect_special_flags() { x86) testcc "$CC" "$CFLAGS -Wa,--divide" && CFLAGS="$CFLAGS -Wa,--divide" + # Always build for i686 -- no sse/mmx instructions since SMM + # modules are compiled using these flags. Note that this + # doesn't prevent a project using xcompile to explicitly + # specify -mmsse, etc flags. + CFLAGS="$CFLAGS -march=i686" ;; esac } |