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Puranjay Mohan says: ==================== bpf: arm64: Indirect jumps Changes in v1->v2: v1: https://lore.kernel.org/all/20251117004656.33292-1-puranjay@kernel.org/ - Dropped patch 3 that was ignoring relocations for .jumptables. LLVM has been fixed to not emit relocations for .jumptables, so this patch is not needed. - Added Reviewed-by: Anton Protopopov <a.s.protopopov@gmail.com> This set adds the support of indirect jumps to the arm64 JIT. It involves calling bpf_prog_update_insn_ptrs() to support instructions array map. The second piece is supporting BPF_JMP|BPF_X|BPF_JA, SRC=0, DST=Rx, off=0, imm=0 instruction that is trivial to implement on arm64. The final patch enables selftests on arm64: [root@localhost bpf]# ./test_progs-cpuv4 -a "*gotox*" #20/1 bpf_gotox/one-switch:OK #20/2 bpf_gotox/one-switch-non-zero-sec-offset:OK #20/3 bpf_gotox/two-switches:OK #20/4 bpf_gotox/big-jump-table:OK #20/5 bpf_gotox/static-global:OK #20/6 bpf_gotox/nonstatic-global:OK #20/7 bpf_gotox/other-sec:OK #20/8 bpf_gotox/static-global-other-sec:OK #20/9 bpf_gotox/nonstatic-global-other-sec:OK #20/10 bpf_gotox/one-jump-two-maps:OK #20/11 bpf_gotox/one-map-two-jumps:OK #20 bpf_gotox:OK #537/1 verifier_gotox/jump_table_ok:OK #537/2 verifier_gotox/jump_table_reserved_field_src_reg:OK #537/3 verifier_gotox/jump_table_reserved_field_non_zero_off:OK #537/4 verifier_gotox/jump_table_reserved_field_non_zero_imm:OK #537/5 verifier_gotox/jump_table_no_jump_table:OK #537/6 verifier_gotox/jump_table_incorrect_dst_reg_type:OK #537/7 verifier_gotox/jump_table_invalid_read_size_u32:OK #537/8 verifier_gotox/jump_table_invalid_read_size_u16:OK #537/9 verifier_gotox/jump_table_invalid_read_size_u8:OK #537/10 verifier_gotox/jump_table_misaligned_access:OK #537/11 verifier_gotox/jump_table_invalid_mem_acceess_pos:OK #537/12 verifier_gotox/jump_table_invalid_mem_acceess_neg:OK #537/13 verifier_gotox/jump_table_add_sub_ok:OK #537/14 verifier_gotox/jump_table_no_writes:OK #537/15 verifier_gotox/jump_table_use_reg_r0:OK #537/16 verifier_gotox/jump_table_use_reg_r1:OK #537/17 verifier_gotox/jump_table_use_reg_r2:OK #537/18 verifier_gotox/jump_table_use_reg_r3:OK #537/19 verifier_gotox/jump_table_use_reg_r4:OK #537/20 verifier_gotox/jump_table_use_reg_r5:OK #537/21 verifier_gotox/jump_table_use_reg_r6:OK #537/22 verifier_gotox/jump_table_use_reg_r7:OK #537/23 verifier_gotox/jump_table_use_reg_r8:OK #537/24 verifier_gotox/jump_table_use_reg_r9:OK #537/25 verifier_gotox/jump_table_outside_subprog:OK #537/26 verifier_gotox/jump_table_contains_non_unique_values:OK #537 verifier_gotox:OK Summary: 2/37 PASSED, 0 SKIPPED, 0 FAILED ==================== Link: https://patch.msgid.link/20251117130732.11107-1-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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Linux kernel
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