A better handling of current_wordsize
On x86_64:
text data bss dec hex filename
435661 26628 47424 509713 7c711 strace_old
435501 26612 47440 509553 7c671 strace_new_clever_wordsize
On x32 and arm it should be even better, current_wordsize becomes
a constant there.
* defs.h: Declare current_wordsize as a variable if needed,
else declare as a constant define.
Remove declatation of personality_wordsize[].
* syscall.c: Make personality_wordsize[] static.
Declare current_wordsize as a variable if needed.
(set_personality): Set current_wordsize only if non-constant.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/defs.h b/defs.h
index 82ffd84..7702aae 100644
--- a/defs.h
+++ b/defs.h
@@ -707,13 +707,20 @@
#if SUPPORTED_PERSONALITIES > 1
extern void set_personality(int personality);
-extern int current_personality;
-extern const int personality_wordsize[];
-# define current_wordsize (personality_wordsize[current_personality])
+extern unsigned current_personality;
#else
# define set_personality(personality) ((void)0)
# define current_personality 0
-# define current_wordsize PERSONALITY0_WORDSIZE
+#endif
+
+#if SUPPORTED_PERSONALITIES == 1
+# define current_wordsize PERSONALITY0_WORDSIZE
+#else
+# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
+# define current_wordsize PERSONALITY0_WORDSIZE
+# else
+extern unsigned current_wordsize;
+# endif
#endif
struct sysent {