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authorAndreas Schwab <schwab@suse.de>2004-04-08 23:30:26 +0000
committerAndreas Schwab <schwab@suse.de>2004-04-08 23:30:26 +0000
commit2114e3242b584a8592abdf394b9890bf4c2e3e3c (patch)
treeadf8015ad6331503184af5244100db4b1c2350f6 /sysdeps
parentadcd516432811caa50970d80eb3e66d83a6dc7c6 (diff)
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(INTERNAL_SYSCALL): Add LOAD_REGS_##nr. (LOAD_ARGS_0, LOAD_ARGS_1, LOAD_ARGS_2, LOAD_ARGS_3, LOAD_ARGS_4) (LOAD_ARGS_5, LOAD_ARGS_6): Load argument values into temporary variables. (LOAD_REGS_0, LOAD_REGS_1, LOAD_REGS_2, LOAD_REGS_3, LOAD_REGS_4) (LOAD_REGS_5, LOAD_REGS_6): New macros to actually load the syscall argument registers.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/m68k/sysdep.h49
1 files changed, 36 insertions, 13 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h
index 3c6266bae4..234ce32f4f 100644
--- a/sysdeps/unix/sysv/linux/m68k/sysdep.h
+++ b/sysdeps/unix/sysv/linux/m68k/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996, 1997, 1998, 2000, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
    December 1995.
@@ -225,7 +225,11 @@ SYSCALL_ERROR_LABEL:							      \
 #define INTERNAL_SYSCALL(name, err, nr, args...)	\
   ({ unsigned int _sys_result;				\
      {							\
+       /* Load argument values in temporary variables
+	  to perform side effects like function calls
+	  before the call used registers are set.  */	\
        LOAD_ARGS_##nr (args)				\
+       LOAD_REGS_##nr					\
        register int _d0 asm ("%d0") = __NR_##name;	\
        asm volatile ("trap #0"				\
 		     : "=d" (_d0)			\
@@ -243,30 +247,49 @@ SYSCALL_ERROR_LABEL:							      \
 #define INTERNAL_SYSCALL_ERRNO(val, err)	(-(val))
 
 #define LOAD_ARGS_0()
+#define LOAD_REGS_0
 #define ASM_ARGS_0
 #define LOAD_ARGS_1(a1)				\
-  register int _d1 asm ("d1") = (int) (a1);	\
-  LOAD_ARGS_0 ()
+  LOAD_ARGS_0 ()				\
+  int __arg1 = (int) (a1);
+#define LOAD_REGS_1				\
+  register int _d1 asm ("d1") = __arg1;		\
+  LOAD_REGS_0
 #define ASM_ARGS_1	ASM_ARGS_0, "d" (_d1)
 #define LOAD_ARGS_2(a1, a2)			\
-  register int _d2 asm ("d2") = (int) (a2);	\
-  LOAD_ARGS_1 (a1)
+  LOAD_ARGS_1 (a1)				\
+  int __arg2 = (int) (a2);
+#define LOAD_REGS_2				\
+  register int _d2 asm ("d2") = __arg2;		\
+  LOAD_REGS_1
 #define ASM_ARGS_2	ASM_ARGS_1, "d" (_d2)
 #define LOAD_ARGS_3(a1, a2, a3)			\
-  register int _d3 asm ("d3") = (int) (a3);	\
-  LOAD_ARGS_2 (a1, a2)
+  LOAD_ARGS_2 (a1, a2)				\
+  int __arg3 = (int) (a3);
+#define LOAD_REGS_3				\
+  register int _d3 asm ("d3") = __arg3;		\
+  LOAD_REGS_2
 #define ASM_ARGS_3	ASM_ARGS_2, "d" (_d3)
 #define LOAD_ARGS_4(a1, a2, a3, a4)		\
-  register int _d4 asm ("d4") = (int) (a4);	\
-  LOAD_ARGS_3 (a1, a2, a3)
+  LOAD_ARGS_3 (a1, a2, a3)			\
+  int __arg4 = (int) (a4);
+#define LOAD_REGS_4				\
+  register int _d4 asm ("d4") = __arg4;		\
+  LOAD_REGS_3
 #define ASM_ARGS_4	ASM_ARGS_3, "d" (_d4)
 #define LOAD_ARGS_5(a1, a2, a3, a4, a5)		\
-  register int _d5 asm ("d5") = (int) (a5);	\
-  LOAD_ARGS_4 (a1, a2, a3, a4)
+  LOAD_ARGS_4 (a1, a2, a3, a4)			\
+  int __arg5 = (int) (a5);
+#define LOAD_REGS_5				\
+  register int _d5 asm ("d5") = __arg5;		\
+  LOAD_REGS_4
 #define ASM_ARGS_5	ASM_ARGS_4, "d" (_d5)
 #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6)	\
-  register int _a0 asm ("a0") = (int) (a6);	\
-  LOAD_ARGS_5 (a1, a2, a3, a4, a5)
+  LOAD_ARGS_5 (a1, a2, a3, a4, a5)		\
+  int __arg6 = (int) (a6);
+#define LOAD_REGS_6				\
+  register int _a0 asm ("a0") = __arg6;		\
+  LOAD_REGS_5
 #define ASM_ARGS_6	ASM_ARGS_5, "a" (_a0)
 
 #endif /* not __ASSEMBLER__ */