diff options
| author | José Fonseca <[email protected]> | 2014-12-02 20:20:43 +0000 |
|---|---|---|
| committer | José Fonseca <[email protected]> | 2014-12-05 15:17:37 +0000 |
| commit | a1fc6a91e5c6ab098fa8576e63b3a070852aa2a7 (patch) | |
| tree | 5811917989af69511591d995515145317135356b /m4/ax_check_compile_flag.m4 | |
| parent | f9098f09720d9b751e8529b2648971ee7d576b37 (diff) | |
mesa: Ensure stack is realigned on x86.
Nowadays GCC assumes stack pointer is 16-byte aligned even on 32-bits,
but that is an assumption OpenGL drivers (or any dynamic library for
that matter) can't afford to make as there are many closed- and open-
source application binaries out there that only assume 4-byte stack
alignment.
This fix uses force_align_arg_pointer GCC attribute, and is only a
stop-gap measure.
The right fix would be to pass -mstackrealign or
-mincoming-stack-boundary=2 to all source fails that use any -msse*
option, as there is no way to guarantee if/when GCC will decide to spill
SSE registers to the stack.
https://bugs.freedesktop.org/show_bug.cgi?id=86788
Reviewed-by: Brian Paul <[email protected]>
Diffstat (limited to 'm4/ax_check_compile_flag.m4')
0 files changed, 0 insertions, 0 deletions