Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
x86/emulator.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/x86/emulator.c b/x86/emulator.c
index e251933..24b33d1 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -803,6 +803,22 @@ static void test_lldt(volatile uint16_t *mem)
report("lldt", sldt() == *mem);
}
+static void test_ltr(volatile uint16_t *mem)
+{
+ struct descriptor_table_ptr gdt_ptr;
+ uint64_t *gdt, *trp;
+ uint16_t tr = str();
+ uint64_t busy_mask = (uint64_t)1 << 41;
+
+ sgdt(&gdt_ptr);
+ gdt = (uint64_t *)gdt_ptr.base;
+ trp = &gdt[tr >> 3];
+ *trp &= ~busy_mask;
+ *mem = tr;
+ asm volatile("ltr %0" : : "m"(*mem) : "memory");
+ report("ltr", str() == tr && (*trp & busy_mask));
+}
+
int main()
{
void *mem;
@@ -856,6 +872,7 @@ int main()
//test_lgdt_lidt(mem);
test_sreg(mem);
test_lldt(mem);
+ test_ltr(mem);
test_mmx_movq_mf(mem, insn_page, alt_insn_page, insn_ram);
--
1.7.11
--
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