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| author | Saul Wold <sgw@linux.intel.com> | 2011-06-01 17:50:22 -0700 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2011-06-02 14:47:26 +0100 |
| commit | 347c30801b6f935a6aefa5578d723a8afcf52790 (patch) | |
| tree | 53e69648d210df3c90a0554abd4ac63e0d3c2d9b /meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch | |
| parent | d3fc33760a80b0a067b41ff88e99941f1c40c8f9 (diff) | |
| download | openembedded-core-347c30801b6f935a6aefa5578d723a8afcf52790.tar.gz openembedded-core-347c30801b6f935a6aefa5578d723a8afcf52790.tar.bz2 openembedded-core-347c30801b6f935a6aefa5578d723a8afcf52790.tar.xz openembedded-core-347c30801b6f935a6aefa5578d723a8afcf52790.zip | |
gcc: Fix volatile access issue for ARM
[YOCTO #1130]
This patch brings in a patch from gcc for the following issue:
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01477.html
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch new file mode 100644 index 000000000..9c8681728 --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-4.6.0/volatile_access_backport.patch @@ -0,0 +1,28 @@ +Pulled from http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01477.html + +Upstream-Status: Backport + +Signed-off-by: Saul Wold <sgw@linux.intel.com> + + gcc/ + * expr.c (expand_expr_real_1): Only use BLKmode for volatile + accesses which are not naturally aligned. + +Index: gcc-4.6.0/gcc/expr.c +=================================================================== +--- gcc-4.6.0.orig/gcc/expr.c 2011-06-01 15:28:55.000000000 -0700 ++++ gcc-4.6.0/gcc/expr.c 2011-06-01 15:41:17.154848182 -0700 +@@ -9178,8 +9178,11 @@ + && modifier != EXPAND_CONST_ADDRESS + && modifier != EXPAND_INITIALIZER) + /* If the field is volatile, we always want an aligned +- access. */ +- || (volatilep && flag_strict_volatile_bitfields > 0) ++ access. Only do this if the access is not already naturally ++ aligned, otherwise "normal" (non-bitfield) volatile fields ++ become non-addressable. */ ++ || (volatilep && flag_strict_volatile_bitfields > 0 ++ && (bitpos % GET_MODE_ALIGNMENT (mode) != 0)) + /* If the field isn't aligned enough to fetch as a memref, + fetch it as a bit field. */ + || (mode1 != BLKmode |