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target-i386: Fix I/O bitmap checks for in/out 

Commit 1b90d56e changed the implementation of in/out imm to not assign
the accessed port number to cpu_T[0] as it appeared unnecessary.
However, currently gen_check_io() makes use of cpu_T[0] to implement the
I/O bitmap checks, so it's in fact still used and the change broke the
check, leading to #GP in legitimate cases (and probably also allowing
access to ports that shouldn't be allowed).

This patch reintroduces the missing assignment for these cases.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Kevin Wolf 2014-01-24 10:57:41 +01:00
parent 46eef33b89
commit 6d093a4f49
1 changed files with 2 additions and 0 deletions
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2
target-i386/translate.c
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@ -6284,6 +6284,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
case 0xe5:
ot = mo_b_d32(b, dflag);
val = cpu_ldub_code(env, s->pc++);
tcg_gen_movi_tl(cpu_T[0], val);
gen_check_io(s, ot, pc_start - s->cs_base,
SVM_IOIO_TYPE_MASK | svm_is_rep(prefixes));
if (use_icount)
@ -6300,6 +6301,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
case 0xe7:
ot = mo_b_d32(b, dflag);
val = cpu_ldub_code(env, s->pc++);
tcg_gen_movi_tl(cpu_T[0], val);
gen_check_io(s, ot, pc_start - s->cs_base,
svm_is_rep(prefixes));
gen_op_mov_v_reg(ot, cpu_T[1], R_EAX);