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Re: enable n32 and n64, and move o32 into mips/mips32


On Mar 20, 2003, Alexandre Oliva <aoliva at redhat dot com> wrote:

> I have another idea that I'm exploring right now.  I'll let you know
> when I've got it working.

Seems to have worked, indeed.  It can now pick the ABI choice from
either the tuple (say mips64-linux-gnuabin64) or from the compiler
flags (-mabi=64 in CC, CFLAGS or CPPFLAGS).  The detected ABI is added
to CPPFLAGS such that it's used in configure tests, but CPPFLAGS
doesn't make it to config.make (and it doesn't seem to be used
uniformly anyway), so I explicitly add the chosen ABI to CC in the
sysdeps Makefile.  This is working beautifully, it's limited to
mips64-specific code in configure.in, and it's robust to conflicting
specifications.

I went ahead and made it bi-endian as well.  Ok to install, if it
doesn't regress o32?  (I intend to get at least o32 to a point in
which it builds and works again before putting this in, but it would
be nice to get approval first, such that it doesn't break again
between my fixing it and my getting approval.).  


This can't go in before the following patch either:

	* sysdeps/mips/elf/ldsodefs.h: Add mips-specific elf64 relocation
	data structures and macros.  Protect from multiple inclusion.

and I'd rather not put it in before :

	* sysdeps/unix/sysv/linux/mips/mips64/n32/dl-librecon.h: New file.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/dl-librecon.h: New file.
	* elf/rtld.c (process_envvars): Handle
	EXTRA_LD_PROCESS_ENVVARS_DECLS, EXTRA_LD_LEN14_ENVVARS and
	EXTRA_LD_AFTER_PROCESS_ENVVARS.

These are the only pending patches from my local 2.3.1-based tree for
the mips64-linux-gnu port to be complete.  I'm sure there's at least
one major issue that has to be addressed before it works in mainline
again: the recent atomicity->atomic patches (*), and probably
INLINE_SYSCALLS for n32 and n64.

(*) I find it odd that Uli uses global changes as an argument against
accepting changes that are mips-specific, given that he doesn't care
to make changes to mips-specific code anyway, and he doesn't even
apologize for leaving it out, probably breaking the port.  I take it
that this argument was as much of an attempt to obscure his prejudice
against mips with an argument that would be valid only if he actually
tried to keep mips working when making global changes.


Index: ChangeLog
from  Alexandre Oliva  <aoliva at redhat dot com>
	* configure.in: Add mips64* support.
	* configure: Rebuilt.
	* sysdeps/mips/bits/endian.h: Make it bi-endian.
	* sysdeps/mips/mipsel/bits/endian.h: Removed.
	* sysdeps/mips/mips64/n32/el/bits/endian.h: Removed.
	* sysdeps/mips/mips64/n64/el/bits/endian.h: Removed.
	* sysdeps/mips/mips32/Makefile (CC): Add -mabi=32.
	* sysdeps/mips/mips64/n32/Makefile (CC): Add -mabi=n32.
	* sysdeps/mips/mips64/n64/Makefile (CC): Add -mabi=64.
	* sysdeps/mips/Implies: Moved wordsize-32 to...
	* sysdeps/mips/mips32/Implies: New file.
	* sysdeps/unix/sysv/linux/mips/sysdep.h: Move to...
	* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h: New file.
	* sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h: New file.

Index: configure.in
===================================================================
RCS file: /cvs/glibc/libc/configure.in,v
retrieving revision 1.386
diff -u -p -r1.386 configure.in
--- configure.in 22 Mar 2003 00:05:11 -0000 1.386
+++ configure.in 22 Mar 2003 14:35:29 -0000
@@ -378,8 +378,33 @@ m680?0)		base_machine=m68k machine=m68k/
 m68k)		base_machine=m68k machine=m68k/m68020 ;;
 m88???)		base_machine=m88k machine=m88k/$machine ;;
 m88k)		base_machine=m88k machine=m88k/m88100 ;;
-mips64*)	base_machine=mips64 machine=mips/mips64/$machine ;;
-mips*)		base_machine=mips machine=mips/$machine ;;
+mips64*)	base_machine=mips64
+		case "$CC $CPPFLAGS $CFLAGS " in
+		*" -mabi=n32 "*) mips_cc_abi=n32 ;;
+		*" -mabi=64 "*|*" -mabi=n64 "*) mips_cc_abi=64 ;;
+		*" -mabi=32 "*|*" -mabi=o32 "*) mips_cc_abi=32 ;;
+		*) mips_cc_abi=default ;;
+		esac
+		case $config_os in
+		*abin32*) mips_config_abi=n32 ;;
+		*abi64*|*abin64*) mips_config_abi=64 ;;
+		*abi32*|*abio32*) mips_config_abi=32 ;;
+		*) mips_config_abi=$mips_cc_abi ;;
+		esac
+		case $mips_config_abi in
+		default) machine=mips/mips64/n32 mips_config_abi=n32 ;;
+		n32) machine=mips/mips64/n32 ;;
+		64) machine=mips/mips64/n64 ;;
+		32) machine=mips/mips32/kern64 ;;
+		esac
+		machine=$machine/$config_machine
+		if test $mips_config_abi != $mips_cc_abi; then
+		  # This won't make it to config.make, but we want to
+		  # set this in case configure tests depend on it.
+		  CPPFLAGS="$CPPFLAGS -mabi=$mips_config_abi"
+		fi
+		;;
+mips*)		base_machine=mips machine=mips/mips32/$machine ;;
 powerpc)	base_machine=powerpc machine=powerpc/powerpc32 ;;
 powerpc64)	base_machine=powerpc machine=powerpc/powerpc64 ;;
 s390)           base_machine=s390 machine=s390/s390-32 ;;
Index: sysdeps/mips/Implies
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mips/Implies,v
retrieving revision 1.5
diff -u -p -r1.5 Implies
--- sysdeps/mips/Implies 10 Jan 2000 12:33:45 -0000 1.5
+++ sysdeps/mips/Implies 22 Mar 2003 14:35:30 -0000
@@ -1,4 +1,3 @@
-wordsize-32
 # MIPS uses IEEE 754 floating point.
 ieee754/flt-32
 ieee754/dbl-64
Index: sysdeps/mips/bits/endian.h
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mips/bits/endian.h,v
retrieving revision 1.2
diff -u -p -r1.2 endian.h
--- sysdeps/mips/bits/endian.h 26 Nov 1997 03:52:55 -0000 1.2
+++ sysdeps/mips/bits/endian.h 22 Mar 2003 14:35:30 -0000
@@ -5,4 +5,9 @@
 # error "Never use <bits/endian.h> directly; include <endian.h> instead."
 #endif
 
-#define __BYTE_ORDER __BIG_ENDIAN
+#if __MIPSEB
+# define __BYTE_ORDER __BIG_ENDIAN
+#endif
+#if __MIPSEL
+# define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
Index: sysdeps/mips/mips32/Implies
===================================================================
RCS file: sysdeps/mips/mips32/Implies
diff -N sysdeps/mips/mips32/Implies
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ sysdeps/mips/mips32/Implies 22 Mar 2003 14:35:30 -0000
@@ -0,0 +1,2 @@
+mips
+wordsize-32
Index: sysdeps/mips/mips32/Makefile
===================================================================
RCS file: sysdeps/mips/mips32/Makefile
diff -N sysdeps/mips/mips32/Makefile
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ sysdeps/mips/mips32/Makefile 22 Mar 2003 14:35:30 -0000
@@ -0,0 +1,3 @@
+ifeq ($(filter -mabi=32,$(CC)),)
+CC += -mabi=32
+endif
Index: sysdeps/mips/mips64/n32/Makefile
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mips/mips64/n32/Makefile,v
retrieving revision 1.1
diff -u -p -r1.1 Makefile
--- sysdeps/mips/mips64/n32/Makefile 17 Mar 2003 16:20:44 -0000 1.1
+++ sysdeps/mips/mips64/n32/Makefile 22 Mar 2003 14:35:30 -0000
@@ -1,2 +1,6 @@
 # `long double' is a distinct type we support.
 long-double-fcts = yes
+
+ifeq ($(filter -mabi=n32,$(CC)),)
+CC += -mabi=n32
+endif
Index: sysdeps/mips/mips64/n32/el/bits/endian.h
===================================================================
RCS file: sysdeps/mips/mips64/n32/el/bits/endian.h
diff -N sysdeps/mips/mips64/n32/el/bits/endian.h
--- sysdeps/mips/mips64/n32/el/bits/endian.h 17 Mar 2003 16:20:44 -0000 1.1
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,8 +0,0 @@
-/* The MIPS architecture has selectable endianness.
-   This file is for a machine using little-endian mode.  */
-
-#ifndef _ENDIAN_H
-# error "Never use <bits/endian.h> directly; include <endian.h> instead."
-#endif
-
-#define __BYTE_ORDER __LITTLE_ENDIAN
Index: sysdeps/mips/mips64/n64/Makefile
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mips/mips64/n64/Makefile,v
retrieving revision 1.1
diff -u -p -r1.1 Makefile
--- sysdeps/mips/mips64/n64/Makefile 17 Mar 2003 16:20:44 -0000 1.1
+++ sysdeps/mips/mips64/n64/Makefile 22 Mar 2003 14:35:30 -0000
@@ -1,2 +1,6 @@
 # `long double' is a distinct type we support.
 long-double-fcts = yes
+
+ifeq ($(filter -mabi=64,$(CC)),)
+CC += -mabi=64
+endif
Index: sysdeps/mips/mips64/n64/el/bits/endian.h
===================================================================
RCS file: sysdeps/mips/mips64/n64/el/bits/endian.h
diff -N sysdeps/mips/mips64/n64/el/bits/endian.h
--- sysdeps/mips/mips64/n64/el/bits/endian.h 17 Mar 2003 16:20:44 -0000 1.1
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,8 +0,0 @@
-/* The MIPS architecture has selectable endianness.
-   This file is for a machine using little-endian mode.  */
-
-#ifndef _ENDIAN_H
-# error "Never use <bits/endian.h> directly; include <endian.h> instead."
-#endif
-
-#define __BYTE_ORDER __LITTLE_ENDIAN
Index: sysdeps/mips/mipsel/bits/endian.h
===================================================================
RCS file: sysdeps/mips/mipsel/bits/endian.h
diff -N sysdeps/mips/mipsel/bits/endian.h
--- sysdeps/mips/mipsel/bits/endian.h 26 Nov 1997 03:53:00 -0000 1.2
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,8 +0,0 @@
-/* The MIPS architecture has selectable endianness.
-   This file is for a machine using little-endian mode.  */
-
-#ifndef _ENDIAN_H
-# error "Never use <bits/endian.h> directly; include <endian.h> instead."
-#endif
-
-#define __BYTE_ORDER __LITTLE_ENDIAN
Index: sysdeps/unix/sysv/linux/mips/sysdep.h
===================================================================
RCS file: sysdeps/unix/sysv/linux/mips/sysdep.h
diff -N sysdeps/unix/sysv/linux/mips/sysdep.h
--- sysdeps/unix/sysv/linux/mips/sysdep.h 27 Jan 2003 20:15:03 -0000 1.4
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,282 +0,0 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#ifndef _LINUX_MIPS_SYSDEP_H
-#define _LINUX_MIPS_SYSDEP_H 1
-
-/* There is some commonality.  */
-#include <sysdeps/unix/mips/sysdep.h>
-
-/* For Linux we can use the system call table in the header file
-	/usr/include/asm/unistd.h
-   of the kernel.  But these symbols do not follow the SYS_* syntax
-   so we have to redefine the `SYS_ify' macro here.  */
-#undef SYS_ify
-#ifdef __STDC__
-# define SYS_ify(syscall_name)	__NR_##syscall_name
-#else
-# define SYS_ify(syscall_name)	__NR_/**/syscall_name
-#endif
-
-#ifdef __ASSEMBLER__
-
-/* We don't want the label for the error handler to be visible in the symbol
-   table when we define it here.  */
-#ifdef __PIC__
-# define SYSCALL_ERROR_LABEL 99b
-#endif
-
-#else   /* ! __ASSEMBLER__ */
-
-/* Define a macro which expands into the inline wrapper code for a system
-   call.  */
-#undef INLINE_SYSCALL
-#define INLINE_SYSCALL(name, nr, args...)                               \
-  ({ INTERNAL_SYSCALL_DECL(err);					\
-     long result_var = INTERNAL_SYSCALL (name, err, nr, args);      	\
-     if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) )  		\
-       {                                                                \
-         __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err));      	\
-         result_var = -1L;                               		\
-       }                                                                \
-     result_var; })
-
-#undef INTERNAL_SYSCALL_DECL
-#define INTERNAL_SYSCALL_DECL(err) long err
-
-#undef INTERNAL_SYSCALL_ERROR_P
-#define INTERNAL_SYSCALL_ERROR_P(val, err)   ((long) (err))
-
-#undef INTERNAL_SYSCALL_ERRNO
-#define INTERNAL_SYSCALL_ERRNO(val, err)     (val)
-
-#undef INTERNAL_SYSCALL
-#define INTERNAL_SYSCALL(name, err, nr, args...) internal_syscall##nr(name, err, args)
-
-#define internal_syscall0(name, err, dummy...) 				\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a3 asm("$7"); 					\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"li\t$2, %2\t\t\t# " #name "\n\t"				\
-	"syscall\n\t" 							\
-	".set reorder" 							\
-	: "=r" (__v0), "=r" (__a3) 					\
-	: "i" (SYS_ify(name))						\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall1(name, err, arg1) 				\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a3 asm("$7"); 					\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"li\t$2, %3\t\t\t# " #name "\n\t"				\
-	"syscall\n\t" 							\
-	".set reorder" 							\
-	: "=r" (__v0), "=r" (__a3) 					\
-	: "r" (__a0), "i" (SYS_ify(name)) 				\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall2(name, err, arg1, arg2) 			\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a3 asm("$7"); 					\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"li\t$2, %4\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	".set\treorder" 						\
-	: "=r" (__v0), "=r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "i" (SYS_ify(name))			\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall3(name, err, arg1, arg2, arg3) 			\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a2 asm("$6") = (long) arg3; 			\
-	register long __a3 asm("$7"); 					\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	".set\treorder" 						\
-	: "=r" (__v0), "=r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)) 	\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall4(name, err, arg1, arg2, arg3, arg4) 		\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a2 asm("$6") = (long) arg3; 			\
-	register long __a3 asm("$7") = (long) arg4; 			\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	".set\treorder" 						\
-	: "=r" (__v0), "+r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)) 	\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall5(name, err, arg1, arg2, arg3, arg4, arg5) 	\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a2 asm("$6") = (long) arg3; 			\
-	register long __a3 asm("$7") = (long) arg4; 			\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"lw\t$2, %6\n\t" 						\
-	"subu\t$29, 32\n\t" 						\
-	"sw\t$2, 16($29)\n\t" 						\
-	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	"addiu\t$29, 32\n\t" 						\
-	".set\treorder" 						\
-	: "=r" (__v0), "+r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
-	  "m" ((long)arg5) 						\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall6(name, err, arg1, arg2, arg3, arg4, arg5, arg6)\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a2 asm("$6") = (long) arg3; 			\
-	register long __a3 asm("$7") = (long) arg4; 			\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"lw\t$2, %6\n\t" 						\
-	"lw\t$8, %7\n\t" 						\
-	"subu\t$29, 32\n\t" 						\
-	"sw\t$2, 16($29)\n\t" 						\
-	"sw\t$8, 20($29)\n\t" 						\
-	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	"addiu\t$29, 32\n\t" 						\
-	".set\treorder" 						\
-	: "=r" (__v0), "+r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
-	  "m" ((long)arg5), "m" ((long)arg6)				\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define internal_syscall7(name, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
-({ 									\
-	long _sys_result;						\
-									\
-	{								\
-	register long __v0 asm("$2"); 					\
-	register long __a0 asm("$4") = (long) arg1; 			\
-	register long __a1 asm("$5") = (long) arg2; 			\
-	register long __a2 asm("$6") = (long) arg3; 			\
-	register long __a3 asm("$7") = (long) arg4; 			\
-	__asm__ volatile ( 						\
-	".set\tnoreorder\n\t" 						\
-	"lw\t$2, %6\n\t" 						\
-	"lw\t$8, %7\n\t" 						\
-	"lw\t$9, %8\n\t" 						\
-	"subu\t$29, 32\n\t" 						\
-	"sw\t$2, 16($29)\n\t" 						\
-	"sw\t$8, 20($29)\n\t" 						\
-	"sw\t$9, 24($29)\n\t" 						\
-	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
-	"syscall\n\t" 							\
-	"addiu\t$29, 32\n\t" 						\
-	".set\treorder" 						\
-	: "=r" (__v0), "+r" (__a3) 					\
-	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
-	  "m" ((long)arg5), "m" ((long)arg6), "m" ((long)arg7)		\
-	: __SYSCALL_CLOBBERS); 						\
-	err = __a3;							\
-	_sys_result = __v0;						\
-	}								\
-	_sys_result;							\
-})
-
-#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
-
-#endif /* __ASSEMBLER__ */
-
-#endif /* linux/mips/sysdep.h */
Index: sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
===================================================================
RCS file: sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
diff -N sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ sysdeps/unix/sysv/linux/mips/mips32/sysdep.h 22 Mar 2003 14:35:31 -0000
@@ -0,0 +1,282 @@
+/* Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _LINUX_MIPS_SYSDEP_H
+#define _LINUX_MIPS_SYSDEP_H 1
+
+/* There is some commonality.  */
+#include <sysdeps/unix/mips/sysdep.h>
+
+/* For Linux we can use the system call table in the header file
+	/usr/include/asm/unistd.h
+   of the kernel.  But these symbols do not follow the SYS_* syntax
+   so we have to redefine the `SYS_ify' macro here.  */
+#undef SYS_ify
+#ifdef __STDC__
+# define SYS_ify(syscall_name)	__NR_##syscall_name
+#else
+# define SYS_ify(syscall_name)	__NR_/**/syscall_name
+#endif
+
+#ifdef __ASSEMBLER__
+
+/* We don't want the label for the error handler to be visible in the symbol
+   table when we define it here.  */
+#ifdef __PIC__
+# define SYSCALL_ERROR_LABEL 99b
+#endif
+
+#else   /* ! __ASSEMBLER__ */
+
+/* Define a macro which expands into the inline wrapper code for a system
+   call.  */
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...)                               \
+  ({ INTERNAL_SYSCALL_DECL(err);					\
+     long result_var = INTERNAL_SYSCALL (name, err, nr, args);      	\
+     if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) )  		\
+       {                                                                \
+         __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err));      	\
+         result_var = -1L;                               		\
+       }                                                                \
+     result_var; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) long err
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err)   ((long) (err))
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err)     (val)
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) internal_syscall##nr(name, err, args)
+
+#define internal_syscall0(name, err, dummy...) 				\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a3 asm("$7"); 					\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"li\t$2, %2\t\t\t# " #name "\n\t"				\
+	"syscall\n\t" 							\
+	".set reorder" 							\
+	: "=r" (__v0), "=r" (__a3) 					\
+	: "i" (SYS_ify(name))						\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall1(name, err, arg1) 				\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a3 asm("$7"); 					\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"li\t$2, %3\t\t\t# " #name "\n\t"				\
+	"syscall\n\t" 							\
+	".set reorder" 							\
+	: "=r" (__v0), "=r" (__a3) 					\
+	: "r" (__a0), "i" (SYS_ify(name)) 				\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall2(name, err, arg1, arg2) 			\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a3 asm("$7"); 					\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"li\t$2, %4\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	".set\treorder" 						\
+	: "=r" (__v0), "=r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "i" (SYS_ify(name))			\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall3(name, err, arg1, arg2, arg3) 			\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a2 asm("$6") = (long) arg3; 			\
+	register long __a3 asm("$7"); 					\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	".set\treorder" 						\
+	: "=r" (__v0), "=r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)) 	\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall4(name, err, arg1, arg2, arg3, arg4) 		\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a2 asm("$6") = (long) arg3; 			\
+	register long __a3 asm("$7") = (long) arg4; 			\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	".set\treorder" 						\
+	: "=r" (__v0), "+r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)) 	\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall5(name, err, arg1, arg2, arg3, arg4, arg5) 	\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a2 asm("$6") = (long) arg3; 			\
+	register long __a3 asm("$7") = (long) arg4; 			\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"lw\t$2, %6\n\t" 						\
+	"subu\t$29, 32\n\t" 						\
+	"sw\t$2, 16($29)\n\t" 						\
+	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	"addiu\t$29, 32\n\t" 						\
+	".set\treorder" 						\
+	: "=r" (__v0), "+r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
+	  "m" ((long)arg5) 						\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall6(name, err, arg1, arg2, arg3, arg4, arg5, arg6)\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a2 asm("$6") = (long) arg3; 			\
+	register long __a3 asm("$7") = (long) arg4; 			\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"lw\t$2, %6\n\t" 						\
+	"lw\t$8, %7\n\t" 						\
+	"subu\t$29, 32\n\t" 						\
+	"sw\t$2, 16($29)\n\t" 						\
+	"sw\t$8, 20($29)\n\t" 						\
+	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	"addiu\t$29, 32\n\t" 						\
+	".set\treorder" 						\
+	: "=r" (__v0), "+r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
+	  "m" ((long)arg5), "m" ((long)arg6)				\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define internal_syscall7(name, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
+({ 									\
+	long _sys_result;						\
+									\
+	{								\
+	register long __v0 asm("$2"); 					\
+	register long __a0 asm("$4") = (long) arg1; 			\
+	register long __a1 asm("$5") = (long) arg2; 			\
+	register long __a2 asm("$6") = (long) arg3; 			\
+	register long __a3 asm("$7") = (long) arg4; 			\
+	__asm__ volatile ( 						\
+	".set\tnoreorder\n\t" 						\
+	"lw\t$2, %6\n\t" 						\
+	"lw\t$8, %7\n\t" 						\
+	"lw\t$9, %8\n\t" 						\
+	"subu\t$29, 32\n\t" 						\
+	"sw\t$2, 16($29)\n\t" 						\
+	"sw\t$8, 20($29)\n\t" 						\
+	"sw\t$9, 24($29)\n\t" 						\
+	"li\t$2, %5\t\t\t# " #name "\n\t" 				\
+	"syscall\n\t" 							\
+	"addiu\t$29, 32\n\t" 						\
+	".set\treorder" 						\
+	: "=r" (__v0), "+r" (__a3) 					\
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (SYS_ify(name)), 	\
+	  "m" ((long)arg5), "m" ((long)arg6), "m" ((long)arg7)		\
+	: __SYSCALL_CLOBBERS); 						\
+	err = __a3;							\
+	_sys_result = __v0;						\
+	}								\
+	_sys_result;							\
+})
+
+#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25"
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* linux/mips/sysdep.h */
Index: sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h
===================================================================
RCS file: sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h
diff -N sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ sysdeps/unix/sysv/linux/mips/mips32/kern64/sysdep.h 22 Mar 2003 14:35:31 -0000
@@ -0,0 +1,36 @@
+/* Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _LINUX_MIPS_SYSDEP_H
+#define _LINUX_MIPS_SYSDEP_H 1
+
+/* There is some commonality.  */
+#include <sysdeps/unix/sysv/linux/mips/mips32/sysdep.h>
+
+/* For Linux we can use the system call table in the header file
+	/usr/include/asm/unistd.h
+   of the kernel.  But these symbols do not follow the SYS_* syntax
+   so we have to redefine the `SYS_ify' macro here.  */
+#undef SYS_ify
+#ifdef __STDC__
+# define SYS_ify(syscall_name)	__NR_O32_##syscall_name
+#else
+# define SYS_ify(syscall_name)	__NR_O32_/**/syscall_name
+#endif
+
+#endif /* linux/mips/sysdep.h */
-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva at {redhat dot com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva at {lsd dot ic dot unicamp dot br, gnu.org}
Free Software Evangelist                Professional serial bug killer

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