This is the same as commit b54b6003612a ("riscv, bpf: Emit fixed-length
instructions for BPF_PSEUDO_FUNC"), but for sparc64. The code sequence
is borrowed from sparc64-linux-gnu-gcc -Os.
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
arch/sparc/net/bpf_jit_comp_64.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/net/bpf_jit_comp_64.c b/arch/sparc/net/bpf_jit_comp_64.c
index fa0759bfe498..59d2d9953aa7 100644
--- a/arch/sparc/net/bpf_jit_comp_64.c
+++ b/arch/sparc/net/bpf_jit_comp_64.c
@@ -1243,10 +1243,19 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
case BPF_LD | BPF_IMM | BPF_DW:
{
const struct bpf_insn insn1 = insn[1];
+ const u8 tmp = bpf2sparc[TMP_REG_1];
u64 imm64;
- imm64 = (u64)insn1.imm << 32 | (u32)imm;
- emit_loadimm64(imm64, dst, ctx);
+ if (bpf_pseudo_func(insn)) {
+ /* fixed-length insns for extra jit pass */
+ emit_set_const(dst, insn1.imm, ctx);
+ emit_set_const(tmp, imm, ctx);
+ emit_alu_K(SLLX, dst, 32, ctx);
+ emit_alu3(ADD, dst, tmp, dst, ctx);
+ } else {
+ imm64 = (u64)insn1.imm << 32 | (u32)imm;
+ emit_loadimm64(imm64, dst, ctx);
+ }
return 1;
}
--
2.39.1
