diff options
Diffstat (limited to 'arch/x86/net')
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 54c7f46c453f..e1b0c5ed0b7c 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -2119,10 +2119,15 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *i if (flags & BPF_TRAMP_F_CALL_ORIG) { restore_regs(m, &prog, nr_args, regs_off); - /* call original function */ - if (emit_call(&prog, orig_call, prog)) { - ret = -EINVAL; - goto cleanup; + if (flags & BPF_TRAMP_F_ORIG_STACK) { + emit_ldx(&prog, BPF_DW, BPF_REG_0, BPF_REG_FP, 8); + EMIT2(0xff, 0xd0); /* call *rax */ + } else { + /* call original function */ + if (emit_call(&prog, orig_call, prog)) { + ret = -EINVAL; + goto cleanup; + } } /* remember return value in a stack for bpf prog to access */ emit_stx(&prog, BPF_DW, BPF_REG_FP, BPF_REG_0, -8); |