Daniel Borkmann 738cbe72ad net: bpf: consolidate JIT binary allocator ... Introduced in commit 314beb9bca ("x86: bpf_jit_comp: secure bpf jit against spraying attacks") and later on replicated in aa2d2c73c2 ("s390/bpf,jit: address randomize and write protect jit code") for s390 architecture, write protection for BPF JIT images got added and a random start address of the JIT code, so that it's not on a page boundary anymore. Since both use a very similar allocator for the BPF binary header, we can consolidate this code into the BPF core as it's mostly JIT independant anyway. This will also allow for future archs that support DEBUG_SET_MODULE_RONX to just reuse instead of reimplementing it. JIT tested on x86_64 and s390x with BPF test suite. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-09-09 16:58:56 -07:00
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bpf_jit_comp.c	net: bpf: consolidate JIT binary allocator	2014-09-09 16:58:56 -07:00
bpf_jit.S	net: filter: x86: internal BPF JIT	2014-05-15 16:31:30 -04:00
Makefile