Menglong Dong ae4a3160d1 bpf: specify the old and new poke_type for bpf_arch_text_poke ...

In the origin logic, the bpf_arch_text_poke() assume that the old and new
instructions have the same opcode. However, they can have different opcode
if we want to replace a "call" insn with a "jmp" insn.

Therefore, add the new function parameter "old_t" along with the "new_t",
which are used to indicate the old and new poke type. Meanwhile, adjust
the implement of bpf_arch_text_poke() for all the archs.

"BPF_MOD_NOP" is added to make the code more readable. In
bpf_arch_text_poke(), we still check if the new and old address is NULL to
determine if nop insn should be used, which I think is more safe.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20251118123639.688444-6-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

2025-11-24 09:47:03 -08:00

..

bpf_jit_comp32.c

riscv, bpf: Introduce shift add helper with Zba optimization

2024-06-03 16:45:23 +02:00

bpf_jit_comp64.c

bpf: specify the old and new poke_type for bpf_arch_text_poke

2025-11-24 09:47:03 -08:00

bpf_jit_core.c

bpf, riscv64: Skip redundant zext instruction after load-acquire

2025-05-09 10:05:27 -07:00

bpf_jit.h

riscv, bpf: Add support arena atomics for RV64

2025-08-15 10:46:51 +02:00

Makefile

riscv, bpf: Add RV32G eBPF JIT

2020-03-05 16:13:47 +01:00