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authorRoland McGrath <roland@gnu.org>2006-02-28 09:34:41 +0000
committerRoland McGrath <roland@gnu.org>2006-02-28 09:34:41 +0000
commit8d2e6a0383b6958311f021ee0b8b7eba44110f5a (patch)
treee995118b74707ad2e2273c46977d9321deb4cbad /sysdeps
parent88fe017b926bbddc4190f260b61cdf7b0f1d668f (diff)
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* 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.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h19
-rw-r--r--sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h20
2 files changed, 33 insertions, 6 deletions
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