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author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-05-13 12:32:54 (GMT) |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-05-13 12:32:54 (GMT) |
commit | dc2af52c0d6d00fd530e4a5e300834cdb1bb1c1c (patch) | |
tree | 4573b99fb11e5b93bd011045039b370ddafe45e6 /arch/powerpc/net/bpf_jit_comp.c | |
parent | f1992dde7fef6713a469a5a142b86812b8a47f9e (diff) | |
parent | 36be50515fe2aef61533b516fa2576a2c7fe7664 (diff) | |
download | linux-fsl-qoriq-dc2af52c0d6d00fd530e4a5e300834cdb1bb1c1c.tar.xz |
Merge tag 'v3.4-rc7' into for-3.5
Linux 3.4-rc7
Conflicts):
drivers/base/regmap/regmap.c (overlap with bug fixes)
sound/soc/blackfin/bf5xx-ssm2602.c (overlap with bug fixes)
Diffstat (limited to 'arch/powerpc/net/bpf_jit_comp.c')
-rw-r--r-- | arch/powerpc/net/bpf_jit_comp.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index 73619d3..2dc8b14 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -127,6 +127,9 @@ static void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx) PPC_BLR(); } +#define CHOOSE_LOAD_FUNC(K, func) \ + ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset) + /* Assemble the body code between the prologue & epilogue. */ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, struct codegen_context *ctx, @@ -391,21 +394,16 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, /*** Absolute loads from packet header/data ***/ case BPF_S_LD_W_ABS: - func = sk_load_word; + func = CHOOSE_LOAD_FUNC(K, sk_load_word); goto common_load; case BPF_S_LD_H_ABS: - func = sk_load_half; + func = CHOOSE_LOAD_FUNC(K, sk_load_half); goto common_load; case BPF_S_LD_B_ABS: - func = sk_load_byte; + func = CHOOSE_LOAD_FUNC(K, sk_load_byte); common_load: - /* - * Load from [K]. Reference with the (negative) - * SKF_NET_OFF/SKF_LL_OFF offsets is unsupported. - */ + /* Load from [K]. */ ctx->seen |= SEEN_DATAREF; - if ((int)K < 0) - return -ENOTSUPP; PPC_LI64(r_scratch1, func); PPC_MTLR(r_scratch1); PPC_LI32(r_addr, K); @@ -429,7 +427,7 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, common_load_ind: /* * Load from [X + K]. Negative offsets are tested for - * in the helper functions, and result in a 'ret 0'. + * in the helper functions. */ ctx->seen |= SEEN_DATAREF | SEEN_XREG; PPC_LI64(r_scratch1, func); @@ -443,13 +441,7 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, break; case BPF_S_LDX_B_MSH: - /* - * x86 version drops packet (RET 0) when K<0, whereas - * interpreter does allow K<0 (__load_pointer, special - * ancillary data). common_load returns ENOTSUPP if K<0, - * so we fall back to interpreter & filter works. - */ - func = sk_load_byte_msh; + func = CHOOSE_LOAD_FUNC(K, sk_load_byte_msh); goto common_load; break; |