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openwrtv3/toolchain/gcc/patches
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Felix Fietkau b050f87d13 gcc: prevent the use of LDRD/STRD on ARMv5TE 
These instructions are for 64-bit load/store. On ARMv5TE, the CPU
requires addresses to be aligned to 64-bit. When misaligned, behavior is
undefined (effectively either loads the same word twice on LDRD, or
corrupts surrounding memory on STRD).

On ARMv6 and newer, unaligned access is safe.

Removing these instructions for ARMv5TE is necessary, because GCC
ignores alignment information in pointers and does unsafe optimizations
that have shown up as bugs in various places.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 39638
2014-02-19 19:20:10 +00:00
..
4.4.7 remove support for ubicom32 2012-11-30 10:53:55 +00:00
4.6-linaro gcc: prevent the use of LDRD/STRD on ARMv5TE 2014-02-19 19:20:10 +00:00
4.8-linaro gcc: prevent the use of LDRD/STRD on ARMv5TE 2014-02-19 19:20:10 +00:00
4.8.0 gcc: prevent the use of LDRD/STRD on ARMv5TE 2014-02-19 19:20:10 +00:00