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authorMarkos Chandras <markos.chandras@imgtec.com>2014-06-23 10:38:51 +0100
committerRalf Baechle <ralf@linux-mips.org>2014-06-26 10:48:21 +0100
commit1ab24a4e3de1ec37d8ed255841d2d94d77e8a4f4 (patch)
treeb8354bcd27d9f6056a61b1b311a16ec67b8e03f8 /arch/mips
parent9eebfe478d1b83389c3ac1bd73a45b6665e356db (diff)
MIPS: bpf: Fix branch conditional for BPF_J{GT/GE} cases
The sltiu and sltu instructions will set the scratch register to 1 if A <= X|K so fix the emitted branch conditional to check for scratch != zero rather than scratch >= zero which would complicate the resuling branch logic given that MIPS does not have a BGT or BGET instructions to compare general purpose registers directly. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: David S. Miller <davem@davemloft.net> Cc: Daniel Borkmann <dborkman@redhat.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: netdev@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7126/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/net/bpf_jit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c
index 8cae27af03da..500f97fdc0e1 100644
--- a/arch/mips/net/bpf_jit.c
+++ b/arch/mips/net/bpf_jit.c
@@ -1127,7 +1127,7 @@ jmp_cmp:
}
/* A < (K|X) ? r_scrach = 1 */
b_off = b_imm(i + inst->jf + 1, ctx);
- emit_bcond(MIPS_COND_GT, r_s0, r_zero, b_off,
+ emit_bcond(MIPS_COND_NE, r_s0, r_zero, b_off,
ctx);
emit_nop(ctx);
/* A > (K|X) ? scratch = 0 */