diff options
Diffstat (limited to 'libc/arch-arm/bionic/atomics_arm.S')
| -rw-r--r-- | libc/arch-arm/bionic/atomics_arm.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libc/arch-arm/bionic/atomics_arm.S b/libc/arch-arm/bionic/atomics_arm.S index b2da09f..f8b23e6 100644 --- a/libc/arch-arm/bionic/atomics_arm.S +++ b/libc/arch-arm/bionic/atomics_arm.S @@ -41,6 +41,8 @@ .equ kernel_cmpxchg, 0xFFFF0FC0 .equ kernel_atomic_base, 0xFFFF0FFF __atomic_dec: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r2, r0 1: @ atomic_dec @@ -53,8 +55,11 @@ __atomic_dec: add r0, r1, #1 ldmia sp!, {r4, lr} bx lr + .fnend __atomic_inc: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r2, r0 1: @ atomic_inc @@ -67,9 +72,12 @@ __atomic_inc: sub r0, r1, #1 ldmia sp!, {r4, lr} bx lr + .fnend /* r0(old) r1(new) r2(addr) -> r0(zero_if_succeeded) */ __atomic_cmpxchg: + .fnstart + .save {r4, lr} stmdb sp!, {r4, lr} mov r4, r0 /* r4 = save oldvalue */ 1: @ atomic_cmpxchg @@ -84,6 +92,7 @@ __atomic_cmpxchg: 2: @ atomic_cmpxchg ldmia sp!, {r4, lr} bx lr + .fnend #else #define KUSER_CMPXCHG 0xffffffc0 |