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bpf: arm64: Add support for instructions array

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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: Puranjay Mohan <puranjay@kernel.org>
Reviewed-by: Anton Protopopov <a.s.protopopov@gmail.com>
Acked-by: Xu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/r/20251117130732.11107-2-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Puranjay Mohan
2025-11-17 13:07:29 +00:00
committed by Alexei Starovoitov
parent 792f258803
commit 84b1c40d5b
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/net/bpf_jit_comp.c
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@@ -2231,6 +2231,13 @@ skip_init_ctx:
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);