diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-06-23 10:38:51 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-06-26 10:48:21 +0100 |
| commit | 1ab24a4e3de1ec37d8ed255841d2d94d77e8a4f4 (patch) | |
| tree | b8354bcd27d9f6056a61b1b311a16ec67b8e03f8 | |
| parent | 9eebfe478d1b83389c3ac1bd73a45b6665e356db (diff) | |
| download | linux-1ab24a4e3de1ec37d8ed255841d2d94d77e8a4f4.tar.gz | |
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>
| -rw-r--r-- | arch/mips/net/bpf_jit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c index 8cae27af03dac7..500f97fdc0e148 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 */ |