Commit 84b1c40d authored by Puranjay Mohan's avatar Puranjay Mohan Committed by Alexei Starovoitov
Browse files

bpf: arm64: Add support for instructions array 



Add support for the instructions array map type in the arm64 JIT by
calling bpf_prog_update_insn_ptrs() with the offsets that map
xlated_offset to the jited_offset in the final image. arm64 JIT already
has this offset array which was being used for
bpf_prog_fill_jited_linfo() and can be used directly for
bpf_prog_update_insn_ptrs.

Signed-off-by: default avatarPuranjay Mohan <puranjay@kernel.org>
Reviewed-by: default avatarAnton Protopopov <a.s.protopopov@gmail.com>
Acked-by: default avatarXu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/r/20251117130732.11107-2-puranjay@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 792f2588

arch/arm64/net/bpf_jit_comp.c

+7 −0
Original line number Diff line number Diff line
@@ -2231,6 +2231,13 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog) 
		for (i = 0; i <= prog->len; i++)

			ctx.offset[i] *= AARCH64_INSN_SIZE;

		bpf_prog_fill_jited_linfo(prog, ctx.offset + 1);

		/*

		 * The bpf_prog_update_insn_ptrs function expects offsets to

		 * point to the first byte of the jitted instruction (unlike

		 * the bpf_prog_fill_jited_linfo above, which, for historical

		 * reasons, expects to point to the next instruction)

		 */

		bpf_prog_update_insn_ptrs(prog, ctx.offset, ctx.ro_image);

out_off:

		if (!ro_header && priv_stack_ptr) {

			free_percpu(priv_stack_ptr);