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authorJiong Wang <jiong.wang@netronome.com>2019-01-26 20:26:08 +0300
committerAlexei Starovoitov <ast@kernel.org>2019-01-27 00:33:02 +0300
commit654b65a04880454efb7d3287f011f2f790963b32 (patch)
tree7f311663caeb410b22c79de77089d9d05a1939b1 /arch/arm64/net
parent69f827eb6e14bdc9c7894fba3a00ca93aaa98a73 (diff)
downloadlinux-654b65a04880454efb7d3287f011f2f790963b32.tar.xz
arm64: bpf: implement jitting of JMP32
This patch implements code-gen for new JMP32 instructions on arm64. Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Zi Shen Lim <zlim.lnx@gmail.com> Signed-off-by: Jiong Wang <jiong.wang@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/arm64/net')
-rw-r--r--arch/arm64/net/bpf_jit_comp.c37
1 files changed, 30 insertions, 7 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 1542df00b23c..aaddc0217e73 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -362,7 +362,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx,
const s16 off = insn->off;
const s32 imm = insn->imm;
const int i = insn - ctx->prog->insnsi;
- const bool is64 = BPF_CLASS(code) == BPF_ALU64;
+ const bool is64 = BPF_CLASS(code) == BPF_ALU64 ||
+ BPF_CLASS(code) == BPF_JMP;
const bool isdw = BPF_SIZE(code) == BPF_DW;
u8 jmp_cond;
s32 jmp_offset;
@@ -559,7 +560,17 @@ emit_bswap_uxt:
case BPF_JMP | BPF_JSLT | BPF_X:
case BPF_JMP | BPF_JSGE | BPF_X:
case BPF_JMP | BPF_JSLE | BPF_X:
- emit(A64_CMP(1, dst, src), ctx);
+ case BPF_JMP32 | BPF_JEQ | BPF_X:
+ case BPF_JMP32 | BPF_JGT | BPF_X:
+ case BPF_JMP32 | BPF_JLT | BPF_X:
+ case BPF_JMP32 | BPF_JGE | BPF_X:
+ case BPF_JMP32 | BPF_JLE | BPF_X:
+ case BPF_JMP32 | BPF_JNE | BPF_X:
+ case BPF_JMP32 | BPF_JSGT | BPF_X:
+ case BPF_JMP32 | BPF_JSLT | BPF_X:
+ case BPF_JMP32 | BPF_JSGE | BPF_X:
+ case BPF_JMP32 | BPF_JSLE | BPF_X:
+ emit(A64_CMP(is64, dst, src), ctx);
emit_cond_jmp:
jmp_offset = bpf2a64_offset(i + off, i, ctx);
check_imm19(jmp_offset);
@@ -601,7 +612,8 @@ emit_cond_jmp:
emit(A64_B_(jmp_cond, jmp_offset), ctx);
break;
case BPF_JMP | BPF_JSET | BPF_X:
- emit(A64_TST(1, dst, src), ctx);
+ case BPF_JMP32 | BPF_JSET | BPF_X:
+ emit(A64_TST(is64, dst, src), ctx);
goto emit_cond_jmp;
/* IF (dst COND imm) JUMP off */
case BPF_JMP | BPF_JEQ | BPF_K:
@@ -614,12 +626,23 @@ emit_cond_jmp:
case BPF_JMP | BPF_JSLT | BPF_K:
case BPF_JMP | BPF_JSGE | BPF_K:
case BPF_JMP | BPF_JSLE | BPF_K:
- emit_a64_mov_i(1, tmp, imm, ctx);
- emit(A64_CMP(1, dst, tmp), ctx);
+ case BPF_JMP32 | BPF_JEQ | BPF_K:
+ case BPF_JMP32 | BPF_JGT | BPF_K:
+ case BPF_JMP32 | BPF_JLT | BPF_K:
+ case BPF_JMP32 | BPF_JGE | BPF_K:
+ case BPF_JMP32 | BPF_JLE | BPF_K:
+ case BPF_JMP32 | BPF_JNE | BPF_K:
+ case BPF_JMP32 | BPF_JSGT | BPF_K:
+ case BPF_JMP32 | BPF_JSLT | BPF_K:
+ case BPF_JMP32 | BPF_JSGE | BPF_K:
+ case BPF_JMP32 | BPF_JSLE | BPF_K:
+ emit_a64_mov_i(is64, tmp, imm, ctx);
+ emit(A64_CMP(is64, dst, tmp), ctx);
goto emit_cond_jmp;
case BPF_JMP | BPF_JSET | BPF_K:
- emit_a64_mov_i(1, tmp, imm, ctx);
- emit(A64_TST(1, dst, tmp), ctx);
+ case BPF_JMP32 | BPF_JSET | BPF_K:
+ emit_a64_mov_i(is64, tmp, imm, ctx);
+ emit(A64_TST(is64, dst, tmp), ctx);
goto emit_cond_jmp;
/* function call */
case BPF_JMP | BPF_CALL: