[Qemu-devel] [PATCH v2 06/10] elfload: only give abi_long/ulong the alignment specified by the target

[Paolo Bonzini <pbonzini@redhat.com>]

Previously, this was done for target_long/ulong, and propagated to
abi_long/ulong via a typedef.  But target_long/ulong should not
have any specific alignment, it is never used to access guest
memory.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure                    |  9 ---------
 include/exec/cpu-defs.h      |  8 ++++----
 include/exec/user/abitypes.h | 19 +++++++++++++------
 target-m68k/cpu.h            |  1 +
 4 files changed, 18 insertions(+), 19 deletions(-)

diff --git a/configure b/configure
index 8276e79..0763047 100755
--- a/configure
+++ b/configure
@@ -4011,7 +4011,6 @@ bflt="no"
 target_nptl="no"
 interp_prefix1=`echo "$interp_prefix" | sed "s/%M/$target_arch2/g"`
 gdb_xml_files=""
-target_long_alignment=4
 target_llong_alignment=8
 target_libs_softmmu=
 
@@ -4024,10 +4023,8 @@ case "$target_arch2" in
   ;;
   x86_64)
     TARGET_BASE_ARCH=i386
-    target_long_alignment=8
   ;;
   alpha)
-    target_long_alignment=8
     target_nptl="yes"
   ;;
   arm|armeb)
@@ -4046,7 +4043,6 @@ case "$target_arch2" in
   m68k)
     bflt="yes"
     gdb_xml_files="cf-core.xml cf-fp.xml"
-    target_long_alignment=2
     target_llong_alignment=2
   ;;
   microblaze|microblazeel)
@@ -4069,7 +4065,6 @@ case "$target_arch2" in
     TARGET_ARCH=mips64
     TARGET_BASE_ARCH=mips
     echo "TARGET_ABI_MIPSN64=y" >> $config_target_mak
-    target_long_alignment=8
   ;;
   moxie)
   ;;
@@ -4091,7 +4086,6 @@ case "$target_arch2" in
     TARGET_BASE_ARCH=ppc
     TARGET_ABI_DIR=ppc
     gdb_xml_files="power64-core.xml power-fpu.xml power-altivec.xml power-spe.xml"
-    target_long_alignment=8
   ;;
   ppc64abi32)
     TARGET_ARCH=ppc64
@@ -4109,7 +4103,6 @@ case "$target_arch2" in
   ;;
   sparc64)
     TARGET_BASE_ARCH=sparc
-    target_long_alignment=8
   ;;
   sparc32plus)
     TARGET_ARCH=sparc64
@@ -4119,7 +4112,6 @@ case "$target_arch2" in
   ;;
   s390x)
     target_nptl="yes"
-    target_long_alignment=8
   ;;
   unicore32)
   ;;
@@ -4151,7 +4143,6 @@ case "$cpu" in
   ;;
 esac
 
-echo "TARGET_LONG_ALIGNMENT=$target_long_alignment" >> $config_target_mak
 echo "TARGET_LLONG_ALIGNMENT=$target_llong_alignment" >> $config_target_mak
 echo "TARGET_ARCH=$TARGET_ARCH" >> $config_target_mak
 target_arch_name="`upper $TARGET_ARCH`"
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index 2aa9331..3cf1272 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -40,14 +40,14 @@ typedef int64_t target_llong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
 typedef uint64_t target_ullong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
 /* target_ulong is the type of a virtual address */
 #if TARGET_LONG_SIZE == 4
-typedef int32_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
-typedef uint32_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
+typedef int32_t target_long;
+typedef uint32_t target_ulong;
 #define TARGET_FMT_lx "%08x"
 #define TARGET_FMT_ld "%d"
 #define TARGET_FMT_lu "%u"
 #elif TARGET_LONG_SIZE == 8
-typedef int64_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
-typedef uint64_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
+typedef int64_t target_long;
+typedef uint64_t target_ulong;
 #define TARGET_FMT_lx "%016" PRIx64
 #define TARGET_FMT_ld "%" PRId64
 #define TARGET_FMT_lu "%" PRIu64
diff --git a/include/exec/user/abitypes.h b/include/exec/user/abitypes.h
index 97a87a6..9bf916a 100644
--- a/include/exec/user/abitypes.h
+++ b/include/exec/user/abitypes.h
@@ -2,12 +2,21 @@
 #define QEMU_TYPES_H
 #include "cpu.h"
 
+#ifdef TARGET_ABI32
+#define TARGET_ABI_BITS 32
+#else
+#define TARGET_ABI_BITS TARGET_LONG_BITS
+#endif
+
 #ifndef ABI_SHORT_ALIGNMENT
 #define ABI_SHORT_ALIGNMENT 2
 #endif
 #ifndef ABI_INT_ALIGNMENT
 #define ABI_INT_ALIGNMENT 4
 #endif
+#ifndef ABI_LONG_ALIGNMENT
+#define ABI_LONG_ALIGNMENT (TARGET_ABI_BITS / 8)
+#endif
 
 typedef int16_t abi_short __attribute__ ((aligned(ABI_SHORT_ALIGNMENT)));
 typedef uint16_t abi_ushort __attribute__((aligned(ABI_SHORT_ALIGNMENT)));
@@ -15,12 +24,11 @@ typedef int32_t abi_int __attribute__((aligned(ABI_INT_ALIGNMENT)));
 typedef uint32_t abi_uint __attribute__((aligned(ABI_INT_ALIGNMENT)));
 
 #ifdef TARGET_ABI32
-typedef uint32_t abi_ulong;
-typedef int32_t abi_long;
+typedef uint32_t abi_ulong __attribute__((aligned(ABI_LONG_ALIGNMENT)));
+typedef int32_t abi_long __attribute__((aligned(ABI_LONG_ALIGNMENT)));
 #define TARGET_ABI_FMT_lx "%08x"
 #define TARGET_ABI_FMT_ld "%d"
 #define TARGET_ABI_FMT_lu "%u"
-#define TARGET_ABI_BITS 32
 
 static inline abi_ulong tswapal(abi_ulong v)
 {
@@ -28,12 +36,11 @@ static inline abi_ulong tswapal(abi_ulong v)
 }
 
 #else
-typedef target_ulong abi_ulong;
-typedef target_long abi_long;
+typedef target_ulong abi_ulong __attribute__((aligned(ABI_LONG_ALIGNMENT)));
+typedef target_long abi_long __attribute__((aligned(ABI_LONG_ALIGNMENT)));
 #define TARGET_ABI_FMT_lx TARGET_FMT_lx
 #define TARGET_ABI_FMT_ld TARGET_FMT_ld
 #define TARGET_ABI_FMT_lu TARGET_FMT_lu
-#define TARGET_ABI_BITS TARGET_LONG_BITS
 /* for consistency, define ABI32 too */
 #if TARGET_ABI_BITS == 32
 #define TARGET_ABI32 1
diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h
index 29cc887..6825e7c 100644
--- a/target-m68k/cpu.h
+++ b/target-m68k/cpu.h
@@ -22,6 +22,7 @@
 
 #define TARGET_LONG_BITS 32
 #define ABI_INT_ALIGNMENT 2
+#define ABI_LONG_ALIGNMENT 2
 
 #define CPUArchState struct CPUM68KState
 
-- 
1.8.1.4