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[Qemu-devel] [PATCH for-1.4 1/2] bswap: Fix width of swap in leul_to_cpu
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH for-1.4 1/2] bswap: Fix width of swap in leul_to_cpu |
Date: |
Mon, 4 Feb 2013 16:21:06 -0800 |
The misnamed HOST_LONG_BITS is really HOST_POINTER_BITS. Here we're
explicitly using an unsigned long, rather than uintptr_t, so it is
more correct to select the swap size via ULONG_MAX.
Acked-by: Andreas Färber <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
include/qemu/bswap.h | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
This is one of many patches around that fixes the build on big-endian
hosts. And indeed is not the only one that should be applied, as there
are arguably several bugs involved.
r~
diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
index e6d4798..d3af35d 100644
--- a/include/qemu/bswap.h
+++ b/include/qemu/bswap.h
@@ -2,8 +2,8 @@
#define BSWAP_H
#include "config-host.h"
-
#include <inttypes.h>
+#include <limits.h>
#include "fpu/softfloat.h"
#ifdef CONFIG_MACHINE_BSWAP_H
@@ -458,7 +458,15 @@ static inline void cpu_to_32wu(uint32_t *p, uint32_t v)
static inline unsigned long leul_to_cpu(unsigned long v)
{
- return le_bswap(v, HOST_LONG_BITS);
+ /* In order to break an include loop between here and
+ qemu-common.h, don't rely on HOST_LONG_BITS. */
+#if ULONG_MAX == UINT32_MAX
+ return le_bswap(v, 32);
+#elif ULONG_MAX == UINT64_MAX
+ return le_bswap(v, 64);
+#else
+# error Unknown sizeof long
+#endif
}
#undef le_bswap
--
1.8.1
- [Qemu-devel] [PATCH for-1.4 1/2] bswap: Fix width of swap in leul_to_cpu,
Richard Henderson <=