From: Eduardo Habkost <ehabkost@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
zhugh.fnst@cn.fujitsu.com, "Igor Mammedov" <imammedo@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Andreas Färber" <afaerber@suse.de>,
"Richard Henderson" <rth@twiddle.net>
Subject: [Qemu-devel] [PATCH] target-i386: Fix signedness of MSR_IA32_APICBASE_BASE
Date: Fri, 29 May 2015 16:52:34 -0300 [thread overview]
Message-ID: <1432929154-11818-1-git-send-email-ehabkost@redhat.com> (raw)
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 <peter.maydell@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
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
next reply other threads:[~2015-05-29 20:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-29 19:52 Eduardo Habkost [this message]
2015-06-02 14:20 ` [Qemu-devel] [PATCH] target-i386: Fix signedness of MSR_IA32_APICBASE_BASE Igor Mammedov
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