* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h

	(DO_CALL): Add support for 6 system call parameters.
	(DECLARGS_6, ASMFMT_6): Define.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.

3 files changed, 40 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 1d3bcb8d95..b5ea890fa0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2006-02-22  Martin Schwidefsky  <schwidefsky@de.ibm.com>
+
+	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
+	(DO_CALL): Add support for 6 system call parameters.
+	(DECLARGS_6, ASMFMT_6): Define.
+	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
+
 2006-02-28  Roland McGrath  <roland@redhat.com>
 
 	* sysdeps/unix/sysv/linux/sh/bits/fcntl.h: Copy in i386/bits/fcntl.h.
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
index 50c3f42469..b86072bd30 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
+/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006
    Free Software Foundation, Inc.
    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
@@ -149,19 +149,28 @@
 	arg 3		4	     call-clobbered
 	arg 4		5	     call-clobbered
 	arg 5		6	     call-saved
+	arg 6		7	     call-saved
 
    (Of course a function with say 3 arguments does not have entries for
    arguments 4 and 5.)
-   S390 does not need to do ANY stack operations to get its parameters
-   right.
+   For system calls with 6 parameters a stack operation is required
+   to load the 6th parameter to register 7. Call saved register 7 is
+   moved to register 0 and back to avoid an additional stack frame.
  */
 
 #define DO_CALL(syscall, args)						      \
+  .if args > 5;								      \
+    lr %r0,%r7;								      \
+    l %r7,96(%r15);							      \
+  .endif;								      \
   .if SYS_ify (syscall) < 256;						      \
     svc SYS_ify (syscall);						      \
   .else;								      \
     lhi %r1,SYS_ify (syscall);						      \
     svc 0;								      \
+  .endif;								      \
+  .if args > 5;								      \
+    lr %r7,%r0;								      \
   .endif
 
 #define ret                                                                   \
@@ -255,6 +264,9 @@
 #define DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
 	DECLARGS_4(arg1, arg2, arg3, arg4) \
 	register unsigned long gpr6 asm ("6") = (unsigned long)(arg5);
+#define DECLARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+	DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
+	register unsigned long gpr7 asm ("7") = (unsigned long)(arg6);
 
 #define ASMFMT_0
 #define ASMFMT_1 , "0" (gpr2)
@@ -262,6 +274,7 @@
 #define ASMFMT_3 , "0" (gpr2), "d" (gpr3), "d" (gpr4)
 #define ASMFMT_4 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5)
 #define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
+#define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7)
 
 
 /* Pointer mangling support.  */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
index aadbf74c2b..fc80c9ff86 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
@@ -1,5 +1,6 @@
 /* Assembler macros for 64 bit S/390.
-   Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+   Free Software Foundation, Inc.
    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
 
@@ -150,19 +151,28 @@
 	arg 3		4	     call-clobbered
 	arg 4		5	     call-clobbered
 	arg 5		6	     call-saved
+	arg 6		7	     call-saved
 
    (Of course a function with say 3 arguments does not have entries for
    arguments 4 and 5.)
-   S390 does not need to do ANY stack operations to get its parameters
-   right.
+   For system calls with 6 parameters a stack operation is required
+   to load the 6th parameter to register 7. Call saved register 7 is
+   moved to register 0 and back to avoid an additional stack frame.
  */
 
 #define DO_CALL(syscall, args)						      \
+  .if args > 5;								      \
+    lgr %r0,%r7;							      \
+    lg %r7,160(%r15);							      \
+  .endif;								      \
   .if SYS_ify (syscall) < 256;						      \
     svc SYS_ify (syscall);						      \
   .else;								      \
     lghi %r1,SYS_ify (syscall);						      \
     svc 0;								      \
+  .endif;								      \
+  .if args > 5;								      \
+    lgr %r7,%r0;							      \
   .endif
 
 #define ret								      \
@@ -256,6 +266,9 @@
 #define DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
 	DECLARGS_4(arg1, arg2, arg3, arg4) \
 	register unsigned long gpr6 asm ("6") = (unsigned long)(arg5);
+#define DECLARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+	DECLARGS_5(arg1, arg2, arg3, arg4, arg5) \
+	register unsigned long gpr6 asm ("7") = (unsigned long)(arg6);
 
 #define ASMFMT_0
 #define ASMFMT_1 , "0" (gpr2)
@@ -263,6 +276,7 @@
 #define ASMFMT_3 , "0" (gpr2), "d" (gpr3), "d" (gpr4)
 #define ASMFMT_4 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5)
 #define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
+#define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7)
 
 /* Pointer mangling support.  */
 #if defined NOT_IN_libc && defined IS_IN_rtld