openwrtv3/toolchain/gcc
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
..
files do not use the wrapper scripts for exportable toolchains internally. on some systems the wrapper scripts are broken, and their use should be opt-in 2009-11-19 17:23:31 +00:00
final gcc: remove the bogus CONFIG_TLS_SUPPORT symbol - TLS support is required by libc. 2013-04-07 10:11:41 +00:00
initial cleanup 2013-04-01 15:43:23 +00:00
minimal gcc: fix up displayed version after r37179 2013-07-05 09:16:08 +00:00
patches gcc: prevent the use of LDRD/STRD on ARMv5TE 2014-02-19 19:20:10 +00:00
common.mk upgrade Linaro GCC 4.8 to 2014.01 2014-02-06 10:28:45 +00:00
Config.in toolchain/gcc: remove 4.6.3, it is unused and unmaintained 2013-09-10 10:30:41 +00:00
Config.version toolchain/gcc: remove 4.6.3, it is unused and unmaintained 2013-09-10 10:30:41 +00:00