[Qemu-devel] [PATCH 1/2] linux-user: ppc: mark as long long aligned

[Alexander Graf <agraf@suse.de>]

The PPC32 ABI dictates that long long (64bit) parameters are pass in odd/even
register pairs. Because unlike ARM and MIPS we start at an odd register number,
we can reuse the same aligning code that ARM and MIPS use.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 linux-user/syscall.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 1a38169..8cd56f2 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -587,12 +587,16 @@ extern int setfsgid(int);
 extern int setgroups(int, gid_t *);
 
 /* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
-#ifdef TARGET_ARM 
+#ifdef TARGET_ARM
 static inline int regpairs_aligned(void *cpu_env) {
     return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
 }
 #elif defined(TARGET_MIPS)
 static inline int regpairs_aligned(void *cpu_env) { return 1; }
+#elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
+/* PPC32 expects 64bit parameters to be passed on odd/even pairs of registers
+   which translates to the same as ARM/MIPS, because we start with r3 as arg1 */
+static inline int regpairs_aligned(void *cpu_env) { return 1; }
 #else
 static inline int regpairs_aligned(void *cpu_env) { return 0; }
 #endif
-- 
1.6.0.2