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Commit Graph

Author	SHA1	Message	Date
Felix Fietkau	af4f534244	toolchain/gcc: update linaro-gcc-4.8 to 2014.04 Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 40664	2014-05-02 21:18:02 +00:00
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

Author

SHA1

Message

Date

Felix Fietkau

af4f534244

toolchain/gcc: update linaro-gcc-4.8 to 2014.04

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

SVN-Revision: 40664

2014-05-02 21:18:02 +00:00

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

2 Commits (d11426b32bea7ca5aedb40cea6082756a8aec63d)