1 files changed, 23 insertions, 15 deletions

diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index bf56e33f8257..ac3c2a10dafd 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -17,14 +17,8 @@
 
 #include "bpf_jit.h"
 
-#ifndef __BIG_ENDIAN
-/* There are endianness assumptions herein. */
-#error "Little-endian PPC not supported in BPF compiler"
-#endif
-
 int bpf_jit_enable __read_mostly;
 
-
 static inline void bpf_flush_icache(void *start, void *end)
 {
         smp_wmb();
@@ -193,6 +187,26 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image,
                                 PPC_MUL(r_A, r_A, r_scratch1);
                         }
                         break;
+                case BPF_S_ALU_MOD_X: /* A %= X; */
+                        ctx->seen |= SEEN_XREG;
+                        PPC_CMPWI(r_X, 0);
+                        if (ctx->pc_ret0 != -1) {
+                                PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]);
+                        } else {
+                                PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12);
+                                PPC_LI(r_ret, 0);
+                                PPC_JMP(exit_addr);
+                        }
+                        PPC_DIVWU(r_scratch1, r_A, r_X);
+                        PPC_MUL(r_scratch1, r_X, r_scratch1);
+                        PPC_SUB(r_A, r_A, r_scratch1);
+                        break;
+                case BPF_S_ALU_MOD_K: /* A %= K; */
+                        PPC_LI32(r_scratch2, K);
+                        PPC_DIVWU(r_scratch1, r_A, r_scratch2);
+                        PPC_MUL(r_scratch1, r_scratch2, r_scratch1);
+                        PPC_SUB(r_A, r_A, r_scratch1);
+                        break;
                 case BPF_S_ALU_DIV_X: /* A /= X; */
                         ctx->seen |= SEEN_XREG;
                         PPC_CMPWI(r_X, 0);
@@ -346,18 +360,11 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image,
                         break;
 
                         /*** Ancillary info loads ***/
-
-                        /* None of the BPF_S_ANC* codes appear to be passed by
-                         * sk_chk_filter().  The interpreter and the x86 BPF
-                         * compiler implement them so we do too -- they may be
-                         * planted in future.
-                         */
                 case BPF_S_ANC_PROTOCOL: /* A = ntohs(skb->protocol); */
                         BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff,
                                                   protocol) != 2);
-                        PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
-                                                          protocol));
-                        /* ntohs is a NOP with BE loads. */
+                        PPC_NTOHS_OFFS(r_A, r_skb, offsetof(struct sk_buff,
+                                                            protocol));
                         break;
                 case BPF_S_ANC_IFINDEX:
                         PPC_LD_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff,
@@ -691,4 +698,5 @@ void bpf_jit_free(struct sk_filter *fp)
 {
         if (fp->bpf_func != sk_run_filter)
                 module_free(NULL, fp->bpf_func);
+        kfree(fp);
 }