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| author | Alexei Starovoitov <ast@kernel.org> | 2024-04-17 23:44:06 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-04-18 18:03:21 +0200 |
| commit | 462e5e2a5938d0241ad146d21dd0da1be8e7eaf0 (patch) | |
| tree | 1c446c24e177d405d9aa60cb2c16c7ff271593e1 /arch/x86/net | |
| parent | libbpf: Fix dump of subsequent char arrays (diff) | |
| download | linux-462e5e2a5938d0241ad146d21dd0da1be8e7eaf0.tar.xz linux-462e5e2a5938d0241ad146d21dd0da1be8e7eaf0.zip | |
bpf: Fix JIT of is_mov_percpu_addr instruction.
The codegen for is_mov_percpu_addr instruction works for rax/r8 registers
only. Fix it to generate proper x86 byte code for other registers.
Fixes: 7bdbf7446305 ("bpf: add special internal-only MOV instruction to resolve per-CPU addrs")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240417214406.15788-1-alexei.starovoitov@gmail.com
Diffstat (limited to 'arch/x86/net')
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 2b5a475c4dd0..673fdbd765d7 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -1439,7 +1439,7 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, u8 *rw_image #ifdef CONFIG_SMP /* add <dst>, gs:[<off>] */ EMIT2(0x65, add_1mod(0x48, dst_reg)); - EMIT3(0x03, add_1reg(0x04, dst_reg), 0x25); + EMIT3(0x03, add_2reg(0x04, 0, dst_reg), 0x25); EMIT((u32)(unsigned long)&this_cpu_off, 4); #endif break; |