diff options
| author | Xu Kuohai <[email protected]> | 2023-08-15 11:41:57 -0400 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2023-08-18 15:46:35 +0200 |
| commit | 68b18191fe417459b4ebf4024cdf1b9d7b393de9 (patch) | |
| tree | e22402ac25e55e1e77f9ec9f38c278eddba8d563 /arch/arm64/net/bpf_jit_comp.c | |
| parent | c32b6ee514d26dc6c40c45984e534b2d87fba917 (diff) | |
bpf, arm64: Support signed div/mod instructions
Add JIT for signed div/mod instructions.
Signed-off-by: Xu Kuohai <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Tested-by: Florent Revest <[email protected]>
Acked-by: Florent Revest <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'arch/arm64/net/bpf_jit_comp.c')
| -rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 924b8ef2e46a..150d1c6543f7 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -828,11 +828,17 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, break; case BPF_ALU | BPF_DIV | BPF_X: case BPF_ALU64 | BPF_DIV | BPF_X: - emit(A64_UDIV(is64, dst, dst, src), ctx); + if (!off) + emit(A64_UDIV(is64, dst, dst, src), ctx); + else + emit(A64_SDIV(is64, dst, dst, src), ctx); break; case BPF_ALU | BPF_MOD | BPF_X: case BPF_ALU64 | BPF_MOD | BPF_X: - emit(A64_UDIV(is64, tmp, dst, src), ctx); + if (!off) + emit(A64_UDIV(is64, tmp, dst, src), ctx); + else + emit(A64_SDIV(is64, tmp, dst, src), ctx); emit(A64_MSUB(is64, dst, dst, tmp, src), ctx); break; case BPF_ALU | BPF_LSH | BPF_X: @@ -959,12 +965,18 @@ emit_bswap_uxt: case BPF_ALU | BPF_DIV | BPF_K: case BPF_ALU64 | BPF_DIV | BPF_K: emit_a64_mov_i(is64, tmp, imm, ctx); - emit(A64_UDIV(is64, dst, dst, tmp), ctx); + if (!off) + emit(A64_UDIV(is64, dst, dst, tmp), ctx); + else + emit(A64_SDIV(is64, dst, dst, tmp), ctx); break; case BPF_ALU | BPF_MOD | BPF_K: case BPF_ALU64 | BPF_MOD | BPF_K: emit_a64_mov_i(is64, tmp2, imm, ctx); - emit(A64_UDIV(is64, tmp, dst, tmp2), ctx); + if (!off) + emit(A64_UDIV(is64, tmp, dst, tmp2), ctx); + else + emit(A64_SDIV(is64, tmp, dst, tmp2), ctx); emit(A64_MSUB(is64, dst, dst, tmp, tmp2), ctx); break; case BPF_ALU | BPF_LSH | BPF_K: |