diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/arch-arm/bionic/atomics_arm.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libc/arch-arm/bionic/atomics_arm.S b/libc/arch-arm/bionic/atomics_arm.S index f8b23e6..4890c76 100644 --- a/libc/arch-arm/bionic/atomics_arm.S +++ b/libc/arch-arm/bionic/atomics_arm.S @@ -139,7 +139,12 @@ __atomic_inc: /* r0(new) r1(addr) -> r0(old) */ __atomic_swap: - swp r0, r0, [r1] +1: + .word 0xe1912f9f /* ldrex r2, [r1] */ + .word 0xe1813f90 /* strex r3, r0, [r1] */ + cmp r3, #0 + bne 1b + mov r0, r2 bx lr /* __futex_wait(*ftx, val, *timespec) */ |