From 138d6153a139c318739f20e61309e5778427a73c Mon Sep 17 00:00:00 2001 From: "Naveen N. Rao" Date: Mon, 4 Apr 2016 22:31:34 +0530 Subject: samples/bpf: Enable powerpc support Add the necessary definitions for building bpf samples on ppc. Since ppc doesn't store function return address on the stack, modify how PT_REGS_RET() and PT_REGS_FP() work. Also, introduce PT_REGS_IP() to access the instruction pointer. Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: David S. Miller Cc: Ananth N Mavinakayanahalli Cc: Michael Ellerman Signed-off-by: Naveen N. Rao Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/tracex2_kern.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'samples/bpf/tracex2_kern.c') diff --git a/samples/bpf/tracex2_kern.c b/samples/bpf/tracex2_kern.c index 09c1adc27d42..6d6eefd0d465 100644 --- a/samples/bpf/tracex2_kern.c +++ b/samples/bpf/tracex2_kern.c @@ -27,10 +27,10 @@ int bpf_prog2(struct pt_regs *ctx) long init_val = 1; long *value; - /* x64/s390x specific: read ip of kfree_skb caller. + /* read ip of kfree_skb caller. * non-portable version of __builtin_return_address(0) */ - bpf_probe_read(&loc, sizeof(loc), (void *)PT_REGS_RET(ctx)); + BPF_KPROBE_READ_RET_IP(loc, ctx); value = bpf_map_lookup_elem(&my_map, &loc); if (value) -- cgit v1.2.3