summaryrefslogtreecommitdiff
path: root/samples/bpf/tracex2_kern.c
diff options
context:
space:
mode:
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2016-04-04 22:31:34 +0530
committerDavid S. Miller <davem@davemloft.net>2016-04-06 16:01:29 -0400
commit138d6153a139c318739f20e61309e5778427a73c (patch)
tree0faa155a8266a068779ecc3c02e8c8098ead3275 /samples/bpf/tracex2_kern.c
parent128d1514be3583c3cfd56d66d7cdfba413b867ae (diff)
downloadlinux-sh-138d6153a139c318739f20e61309e5778427a73c.tar.gz
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 <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David S. Miller <davem@davemloft.net> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tracex2_kern.c')
-rw-r--r--samples/bpf/tracex2_kern.c4
1 files changed, 2 insertions, 2 deletions
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)