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[Qemu-devel] [PATCH 5/5] kqemu: Implement lar/lsl in the monitor code in
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH 5/5] kqemu: Implement lar/lsl in the monitor code interpreter |
Date: |
Fri, 29 May 2009 19:18:31 +0200 |
User-agent: |
StGIT/0.14.3 |
This avoids user space for handling lar/lsl via TCG.
Signed-off-by: Jan Kiszka <address@hidden>
---
common/interp.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 109 insertions(+), 2 deletions(-)
diff --git a/common/interp.c b/common/interp.c
index 4f93bc3..577d666 100644
--- a/common/interp.c
+++ b/common/interp.c
@@ -1720,6 +1720,93 @@ void helper_lldt(struct kqemu_state *s, int selector)
env->ldt.selector = selector;
}
+static int helper_lar(struct kqemu_state *s, int selector)
+{
+ uint32_t e1, e2;
+ int rpl, dpl, cpl, type;
+
+ if ((selector & 0xfffc) == 0)
+ goto fail;
+ if (load_segment(s, &e1, &e2, selector) != 0)
+ goto fail;
+ rpl = selector & 3;
+ dpl = (e2 >> DESC_DPL_SHIFT) & 3;
+ cpl = s->cpu_state.cpl;
+ if (e2 & DESC_S_MASK) {
+ if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
+ /* conforming */
+ } else {
+ if (dpl < cpl || dpl < rpl)
+ goto fail;
+ }
+ } else {
+ type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
+ switch(type) {
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 9:
+ case 11:
+ case 12:
+ break;
+ default:
+ goto fail;
+ }
+ if (dpl < cpl || dpl < rpl) {
+ fail:
+ set_reset_eflags(s, 0, CC_Z);
+ return 0;
+ }
+ }
+ set_reset_eflags(s, CC_Z, 0);
+ return e2 & 0x00f0ff00;
+}
+
+static int helper_lsl(struct kqemu_state *s, int selector)
+{
+ unsigned int limit;
+ uint32_t e1, e2;
+ int rpl, dpl, cpl, type;
+
+ if ((selector & 0xfffc) == 0)
+ goto fail;
+ if (load_segment(s, &e1, &e2, selector) != 0)
+ goto fail;
+ rpl = selector & 3;
+ dpl = (e2 >> DESC_DPL_SHIFT) & 3;
+ cpl = s->cpu_state.cpl;
+ if (e2 & DESC_S_MASK) {
+ if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
+ /* conforming */
+ } else {
+ if (dpl < cpl || dpl < rpl)
+ goto fail;
+ }
+ } else {
+ type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
+ switch(type) {
+ case 1:
+ case 2:
+ case 3:
+ case 9:
+ case 11:
+ break;
+ default:
+ goto fail;
+ }
+ if (dpl < cpl || dpl < rpl) {
+ fail:
+ set_reset_eflags(s, 0, CC_Z);
+ return 0;
+ }
+ }
+ limit = get_seg_limit(e1, e2);
+ set_reset_eflags(s, CC_Z, 0);
+ return limit;
+}
+
static void helper_verr(struct kqemu_state *s, int selector)
{
uint32_t e1, e2;
@@ -4616,6 +4703,28 @@ QO( case OT_LONG | 8:\
goto illegal_op;
}
goto insn_next;
+ LABEL(102) /* lar */
+ LABEL(103) /* lsl */
+ if (!(s->cpu_state.cr0 & CR0_PE_MASK) || get_eflags_vm(s))
+ goto illegal_op;
+ ot = s->dflag + OT_WORD;
+ modrm = ldub_code(s);
+ mod = (modrm >> 6);
+ if (mod == 3) {
+ rm = (modrm & 7) | REX_B(s);
+ val = get_regS(s, OT_WORD, rm) & 0xffff;
+ } else {
+ addr = get_modrm(s, modrm);
+ val = ldS(s, OT_WORD, addr);
+ }
+ rm = ((modrm >> 3) & 7) | REX_R(s);
+ if (b == 0x102)
+ val = helper_lar(s, val);
+ else
+ val = helper_lsl(s, val);
+ if (s->regs1.eflags & CC_Z)
+ set_regS(s, ot, rm, val);
+ goto insn_next;
LABEL(108) /* invd */
LABEL(109) /* wbinvd */
if (s->cpu_state.cpl != 0)
@@ -5214,8 +5323,6 @@ QO( case OT_LONG | 8:\
LABEL(10b)
LABEL(10a)
LABEL(104)
- LABEL(103)
- LABEL(102)
LABEL(f1)
LABEL(e2)
LABEL(e1)
- [Qemu-devel] [PATCH 0/5] Some small kqemu fixes and enhancements, Jan Kiszka, 2009/05/29
- [Qemu-devel] [PATCH 4/5] kqemu: Implement verr/verw in the monitor code interpreter, Jan Kiszka, 2009/05/29
- [Qemu-devel] [PATCH 5/5] kqemu: Implement lar/lsl in the monitor code interpreter,
Jan Kiszka <=
- [Qemu-devel] [PATCH 2/5] kqemu: i386: Reorder DS and ES on exception stack, Jan Kiszka, 2009/05/29
- [Qemu-devel] [PATCH 3/5] kqemu: Fix forbidden selector range change, Jan Kiszka, 2009/05/29
- [Qemu-devel] [PATCH 1/5] kqemu: x86-64: Run 16-bit-stack-return in ring 0, Jan Kiszka, 2009/05/29
- Re: [Qemu-devel] [PATCH 0/5] Some small kqemu fixes and enhancements, Andreas Färber, 2009/05/29