[Qemu-devel] [PATCH] target-i386: Fix signedness of MSR_IA32_APICBASE_BASE

[Eduardo Habkost]

Existing definition triggers the following when using clang
-fsanitize=undefined:

    hw/intc/apic_common.c:314:55: runtime error: left shift of 1048575 by 12
        places cannot be represented in type 'int'

Fix it so we won't try to shift a 1 to the sign bit of a signed integer.

Suggested-by: Peter Maydell <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
 target-i386/cpu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 4ee12ca..26182bd 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -305,7 +305,7 @@
 #define MSR_IA32_APICBASE               0x1b
 #define MSR_IA32_APICBASE_BSP           (1<<8)
 #define MSR_IA32_APICBASE_ENABLE        (1<<11)
-#define MSR_IA32_APICBASE_BASE          (0xfffff<<12)
+#define MSR_IA32_APICBASE_BASE          (0xfffffU<<12)
 #define MSR_IA32_FEATURE_CONTROL        0x0000003a
 #define MSR_TSC_ADJUST                  0x0000003b
 #define MSR_IA32_TSCDEADLINE            0x6e0
-- 
2.1.0