Alexei Starovoitov f6f2332dce sparc: bpf_jit: fix support for ldx/stx mem and SKF_AD_VLAN_TAG ... fix several issues in sparc BPF JIT compiler. ldx/stx related: . classic BPF instructions that access mem[] slots were not setting SEEN_MEM flag, so stack wasn't allocated. Fix that by advertising correct flags . LDX/STX instructions were missing SEEN_XREG, so register value could have leaked to user space. Fix it. . since stack for mem[] slots is allocated with 'sub %sp' instead of 'save %sp', use %sp as base register instead of %fp. . ldx mem[0] means first slot in classic BPF which should have -4 offset instead of 0. . sparc64 needs 2047 stack bias as per ABI to access stack . emit_stmem() was using LD32I macro instead of ST32I SKF_AD_VLAN_TAG* related: . SKF_AD_VLAN_TAG_PRESENT must return 1 or 0 instead of '> 0' or 0 as per classic BPF de facto standard . SKF_AD_VLAN_TAG needs to mask the field correctly Fixes: 2809a2087c ("net: filter: Just In Time compiler for sparc") Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-09-19 16:01:18 -04:00
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Makefile	net: filter: Just In Time compiler for sparc	2012-04-16 23:15:14 -04:00
bpf_jit.h	net: filter: Fix some more small issues in sparc JIT.	2012-04-17 16:43:46 -04:00
bpf_jit_asm.S	net: filter: Fix some more small issues in sparc JIT.	2012-04-17 16:43:46 -04:00
bpf_jit_comp.c	sparc: bpf_jit: fix support for ldx/stx mem and SKF_AD_VLAN_TAG	2014-09-19 16:01:18 -04:00