Always use an odd/even register pair for our 64-bit registers, so that
we're able to use the double-word load/store instructions in the future.
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
arch/arm/net/bpf_jit_32.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index f0cad9692952..006ff9615850 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -47,27 +47,27 @@
* The callee saved registers depends on whether frame pointers are enabled.
* With frame pointers (to be compliant with the ABI):
*
- * high
- * original ARM_SP => +------------------+ \
- * | pc | |
- * current ARM_FP => +------------------+ } callee saved registers
- * |r4-r8,r10,fp,ip,lr| |
- * +------------------+ /
- * low
+ * high
+ * original ARM_SP => +--------------+ \
+ * | pc | |
+ * current ARM_FP => +--------------+ } callee saved registers
+ * |r4-r9,fp,ip,lr| |
+ * +--------------+ /
+ * low
*
* Without frame pointers:
*
- * high
- * original ARM_SP => +------------------+
- * | r4-r8,r10,fp,lr | callee saved registers
- * current ARM_FP => +------------------+
- * low
+ * high
+ * original ARM_SP => +--------------+
+ * | r4-r9,fp,lr | callee saved registers
+ * current ARM_FP => +--------------+
+ * low
*
* When popping registers off the stack at the end of a BPF function, we
* reference them via the current ARM_FP register.
*/
#define CALLEE_MASK (1 << ARM_R4 | 1 << ARM_R5 | 1 << ARM_R6 | \
- 1 << ARM_R7 | 1 << ARM_R8 | 1 << ARM_R10 | \
+ 1 << ARM_R7 | 1 << ARM_R8 | 1 << ARM_R9 | \
1 << ARM_FP)
#define CALLEE_PUSH_MASK (CALLEE_MASK | 1 << ARM_LR)
#define CALLEE_POP_MASK (CALLEE_MASK | 1 << ARM_PC)
@@ -157,7 +157,7 @@ static const s8 bpf2a32[][2] = {
* for constant blindings and others.
*/
[TMP_REG_1] = {ARM_R7, ARM_R6},
- [TMP_REG_2] = {ARM_R10, ARM_R8},
+ [TMP_REG_2] = {ARM_R9, ARM_R8},
/* Tail call count. Stored on stack scratch space. */
[TCALL_CNT] = {STACK_OFFSET(BPF_TC_HI), STACK_OFFSET(BPF_TC_LO)},
/* temporary register for blinding constants.
--
2.7.4
