LoongArch: BPF: Adjust the jump offset of tail calls

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commit 61319d15a5 upstream.

Call the next bpf prog and skip the first instruction of TCC
initialization.

A total of 7 instructions are skipped:
'move t0, ra'			1 inst
'move_imm + jirl'		5 inst
'addid REG_TCC, zero, 0'	1 inst

Relevant test cases: the tailcalls test item in selftests/bpf.

Cc: stable@vger.kernel.org
Fixes: 677e6123e3 ("LoongArch: BPF: Disable trampoline for kernel module function trace")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Chenghao Duan 2025-12-31 15:19:21 +08:00 • committed by Greg Kroah-Hartman

parent 85fdef3dcc

commit a6493ebd6d

1 changed files with 1 additions and 1 deletions

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arch/loongarch/net/bpf_jit.c

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