diff options
| author |   kettenis <kettenis@openbsd.org> | 2015-12-01 15:18:29 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2015-12-01 15:18:29 +0000 |
| commit | 697a24b00b9fb4ee95e42175a8cfed5d34a134c7 (patch) | |
| tree | 99093afe168357169772e2f5c0bf05e01c4d98b4 /lib/libc | |
| parent | Document that "tty" provides read-write access to /dev/tty too. (diff) | |
| download | wireguard-openbsd-697a24b00b9fb4ee95e42175a8cfed5d34a134c7.tar.xz wireguard-openbsd-697a24b00b9fb4ee95e42175a8cfed5d34a134c7.zip | |
Fix __sync_val_compare_and_swap_8() on i386 for code compiled with -fPIC.
In some cases GCC would generate a cmpxchg8b instruction with a memory
reference that used %ebx. This is wrong (and will almost certainly result
in SIGSEGV). This fix uses a new memory constraint "W" to prevent the use
of %ebx in this case. This differs from the approach taken by upstream so
there are no GPLv3 issues here.
Fixes the Mesa i965 dri module on i386.
ok jsg@
Diffstat (limited to 'lib/libc')
0 files changed, 0 insertions, 0 deletions