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Miller" Subject: [PATCH bpf-next v3 04/12] bpf: sparc64: Emit fixed-length instructions for BPF_PSEUDO_FUNC Date: Wed, 22 Feb 2023 23:37:06 +0100 Message-Id: <20230222223714.80671-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230222223714.80671-1-iii@linux.ibm.com> References: <20230222223714.80671-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 3poLbGLbcq0ryIbk4NB76tyTk_msG5Fx X-Proofpoint-GUID: TTegQ7HCz9xwOOiqQaNmkak9eIXNKj6p X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-22_10,2023-02-22_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 adultscore=0 spamscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302220195 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org 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 Signed-off-by: Ilya Leoshkevich --- 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