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filter: bpf_jit_comp: refactor and unify BPF JIT image dump output

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If bpf_jit_enable > 1, then we dump the emitted JIT compiled image
after creation. Currently, only SPARC and PowerPC has similar output
as in the reference implementation on x86_64. Make a small helper
function in order to reduce duplicated code and make the dump output
uniform across architectures x86_64, SPARC, PPC, ARM (e.g. on ARM
flen, pass and proglen are currently not shown, but would be
interesting to know as well), also for future BPF JIT implementations
on other archs.

Cc: Mircea Gherzan <mgherzan@gmail.com>
Cc: Matt Evans <matt@ozlabs.org>
Cc: Eric Dumazet <eric.dumazet@google.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2013-03-21 22:22:03 +01:00
committed by David S. Miller
parent d5e07e6921
commit 79617801ea
5 changed files with 19 additions and 23 deletions
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12
arch/powerpc/net/bpf_jit_comp.c
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@@ -671,16 +671,12 @@ void bpf_jit_compile(struct sk_filter *fp)
}
if (bpf_jit_enable > 1)
pr_info("flen=%d proglen=%u pass=%d image=%p\n",
flen, proglen, pass, image);
/* Note that we output the base address of the code_base
* rather than image, since opcodes are in code_base.
*/
bpf_jit_dump(flen, proglen, pass, code_base);
if (image) {
if (bpf_jit_enable > 1)
print_hex_dump(KERN_ERR, "JIT code: ",
DUMP_PREFIX_ADDRESS,
16, 1, code_base,
proglen, false);
bpf_flush_icache(code_base, code_base + (proglen/4));
/* Function descriptor nastiness: Address + TOC */
((u64 *)image)[0] = (u64)code_base;