bpf, riscv: Support riscv jit to provide bpf_line_info

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[ Upstream commit 3cb7041304 ]

Add support for riscv jit to provide bpf_line_info. We need to
consider the prologue offset in ctx->offset, but unlike x86 and
arm64, ctx->offset of riscv does not provide an extra slot for
the prologue, so here we just calculate the len of prologue and
add it to ctx->offset at the end. Both RV64 and RV32 have been
tested.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220530092815.1112406-3-pulehui@huawei.com
Stable-dep-of: c56fb2aab2 ("riscv, bpf: Fix inconsistent JIT image generation")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pu Lehui 2022-05-30 17:28:11 +08:00 • committed by Greg Kroah-Hartman

parent 420d30d367

commit 4e4e1f99bb

2 changed files with 8 additions and 1 deletions

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arch/riscv/net/bpf_jit.h

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8

arch/riscv/net/bpf_jit_core.c

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