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| author |   Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2016-04-04 22:31:34 +0530 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-04-06 16:01:29 -0400 |
| commit | 138d6153a139c318739f20e61309e5778427a73c (patch) | |
| tree | 0faa155a8266a068779ecc3c02e8c8098ead3275 /samples/bpf/tracex2_kern.c | |
| parent | samples/bpf: Use llc in PATH, rather than a hardcoded value (diff) | |
| download | wireguard-linux-138d6153a139c318739f20e61309e5778427a73c.tar.xz wireguard-linux-138d6153a139c318739f20e61309e5778427a73c.zip | |
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.c | 4 |
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) |