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MIPS: bpf: Fix stack space allocation for BPF memwords on MIPS64

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When allocating stack space for BPF memwords we need to use the
appropriate 32 or 64-bit instruction to avoid losing the top 32 bits
of the stack pointer.

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/7135/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Markos Chandras 2014-06-23 10:39:00 +01:00 committed by Ralf Baechle
parent b6a14a9845
commit d8214ef14a
1 changed files with 4 additions and 1 deletions
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5
arch/mips/net/bpf_jit.c
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@ -623,7 +623,10 @@ static void save_bpf_jit_regs(struct jit_ctx *ctx, unsigned offset)
if (ctx->flags & SEEN_MEM) {
if (real_off % (RSIZE * 2))
real_off += RSIZE;
emit_addiu(r_M, r_sp, real_off, ctx);
if (config_enabled(CONFIG_64BIT))
emit_daddiu(r_M, r_sp, real_off, ctx);
else
emit_addiu(r_M, r_sp, real_off, ctx);
}
}