26eea19eff
- disable the BSD userland emulation support for now, it's not widely useful yet - workaround for incorrect time_t type assumption, from stsp@ N.B. As of QEMU 1.0 the i386 target has been renamed from qemu to qemu-system-i386, you will need to change scripts/command lines as necessary. ok stsp@ dcoppa@
33 lines
1.5 KiB
Plaintext
33 lines
1.5 KiB
Plaintext
$OpenBSD: patch-target-i386_translate_c,v 1.6 2011/12/12 10:56:56 sthen Exp $
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--- target-i386/translate.c.orig Mon Nov 7 16:24:56 2011
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+++ target-i386/translate.c Mon Nov 7 17:39:18 2011
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@@ -4870,20 +4870,24 @@ static target_ulong disas_insn(DisasContext *s, target
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tcg_gen_sub_tl(t2, cpu_regs[R_EAX], t0);
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gen_extu(ot, t2);
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tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, label1);
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+ label2 = gen_new_label();
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if (mod == 3) {
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- label2 = gen_new_label();
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gen_op_mov_reg_v(ot, R_EAX, t0);
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tcg_gen_br(label2);
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gen_set_label(label1);
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gen_op_mov_reg_v(ot, rm, t1);
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- gen_set_label(label2);
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} else {
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- tcg_gen_mov_tl(t1, t0);
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+ /* perform no-op store cycle like physical cpu; must be
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+ before changing accumulator to ensure idempotency if
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+ the store faults and the instruction is restarted
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+ */
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+ gen_op_st_v(ot + s->mem_index, t0, a0);
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gen_op_mov_reg_v(ot, R_EAX, t0);
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+ tcg_gen_br(label2);
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gen_set_label(label1);
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- /* always store */
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gen_op_st_v(ot + s->mem_index, t1, a0);
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}
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+ gen_set_label(label2);
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tcg_gen_mov_tl(cpu_cc_src, t0);
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tcg_gen_mov_tl(cpu_cc_dst, t2);
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s->cc_op = CC_OP_SUBB + ot;
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