[glibc.git] / sysdeps / unix / sysv / linux / m68k / sysdep.h

/* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004, 2006, 2010
   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.

   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_M68K_SYSDEP_H
#define _LINUX_M68K_SYSDEP_H 1

#include <sysdeps/unix/sysdep.h>
#include <sysdeps/m68k/sysdep.h>
#include <tls.h>

/* Defines RTLD_PRIVATE_ERRNO.  */
#include <dl-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__

/* Linux uses a negative return value to indicate syscall errors, unlike
   most Unices, which use the condition codes' carry flag.

   Since version 2.1 the return value of a system call might be negative
   even if the call succeeded.  E.g., the `lseek' system call might return
   a large offset.  Therefore we must not anymore test for < 0, but test
   for a real error by making sure the value in %d0 is a real error
   number.  Linus said he will make sure the no syscall returns a value
   in -1 .. -4095 as a valid result so we can savely test with -4095.  */

/* 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 .Lsyscall_error
#else
#define SYSCALL_ERROR_LABEL __syscall_error
#endif

#undef PSEUDO
#define	PSEUDO(name, syscall_name, args)				      \
  .text;								      \
  ENTRY (name)								      \
    DO_CALL (syscall_name, args);					      \
    cmp.l &-4095, %d0;							      \
    jcc SYSCALL_ERROR_LABEL

#undef PSEUDO_END
#define PSEUDO_END(name)						      \
  SYSCALL_ERROR_HANDLER;						      \
  END (name)

#undef PSEUDO_NOERRNO
#define	PSEUDO_NOERRNO(name, syscall_name, args)			      \
  .text;								      \
  ENTRY (name)								      \
    DO_CALL (syscall_name, args)

#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name)					      \
  END (name)

#define ret_NOERRNO rts

/* The function has to return the error code.  */
#undef	PSEUDO_ERRVAL
#define	PSEUDO_ERRVAL(name, syscall_name, args) \
  .text;								      \
  ENTRY (name)								      \
    DO_CALL (syscall_name, args);					      \
    negl %d0

#undef	PSEUDO_END_ERRVAL
#define	PSEUDO_END_ERRVAL(name) \
  END (name)

#define ret_ERRVAL rts

#ifdef PIC
# if RTLD_PRIVATE_ERRNO
#  define SYSCALL_ERROR_HANDLER						      \
SYSCALL_ERROR_LABEL:							      \
    PCREL_OP (lea, rtld_errno, %a0, %a0);				      \
    neg.l %d0;								      \
    move.l %d0, (%a0);							      \
    move.l &-1, %d0;							      \
    /* Copy return value to %a0 for syscalls that are declared to return      \
       a pointer (e.g., mmap).  */					      \
    move.l %d0, %a0;							      \
    rts;
# else /* !RTLD_PRIVATE_ERRNO */
/* Store (- %d0) into errno through the GOT.  */
#  if defined _LIBC_REENTRANT
#   define SYSCALL_ERROR_HANDLER					      \
SYSCALL_ERROR_LABEL:							      \
    neg.l %d0;								      \
    move.l %d0, -(%sp);							      \
    jbsr __errno_location@PLTPC;					      \
    move.l (%sp)+, (%a0);						      \
    move.l &-1, %d0;							      \
    /* Copy return value to %a0 for syscalls that are declared to return      \
       a pointer (e.g., mmap).  */					      \
    move.l %d0, %a0;							      \
    rts;
#  else /* !_LIBC_REENTRANT */
#   define SYSCALL_ERROR_HANDLER					      \
SYSCALL_ERROR_LABEL:							      \
    move.l (errno@GOTPC, %pc), %a0;					      \
    neg.l %d0;								      \
    move.l %d0, (%a0);							      \
    move.l &-1, %d0;							      \
    /* Copy return value to %a0 for syscalls that are declared to return      \
       a pointer (e.g., mmap).  */					      \
    move.l %d0, %a0;							      \
    rts;
#  endif /* _LIBC_REENTRANT */
# endif /* RTLD_PRIVATE_ERRNO */
#else
# define SYSCALL_ERROR_HANDLER	/* Nothing here; code in sysdep.S is used.  */
#endif /* PIC */

/* Linux takes system call arguments in registers:

	syscall number	%d0	     call-clobbered
	arg 1		%d1	     call-clobbered
	arg 2		%d2	     call-saved
	arg 3		%d3	     call-saved
	arg 4		%d4	     call-saved
	arg 5		%d5	     call-saved
	arg 6		%a0	     call-clobbered

   The stack layout upon entering the function is:

	24(%sp)		Arg# 6
	20(%sp)		Arg# 5
	16(%sp)		Arg# 4
	12(%sp)		Arg# 3
	 8(%sp)		Arg# 2
	 4(%sp)		Arg# 1
	  (%sp)		Return address

   (Of course a function with say 3 arguments does not have entries for
   arguments 4 and 5.)

   Separate move's are faster than movem, but need more space.  Since
   speed is more important, we don't use movem.  Since %a0 and %a1 are
   scratch registers, we can use them for saving as well.  */

#define DO_CALL(syscall_name, args)			      		      \
    move.l &SYS_ify(syscall_name), %d0;					      \
    DOARGS_##args							      \
    trap &0;								      \
    UNDOARGS_##args

#define	DOARGS_0	/* No arguments to frob.  */
#define	UNDOARGS_0	/* No arguments to unfrob.  */
#define	_DOARGS_0(n)	/* No arguments to frob.  */

#define	DOARGS_1	_DOARGS_1 (4)
#define	_DOARGS_1(n)	move.l n(%sp), %d1; _DOARGS_0 (n)
#define	UNDOARGS_1	UNDOARGS_0

#define	DOARGS_2	_DOARGS_2 (8)
#define	_DOARGS_2(n)	move.l %d2, %a0; move.l n(%sp), %d2; _DOARGS_1 (n-4)
#define	UNDOARGS_2	UNDOARGS_1; move.l %a0, %d2

#define DOARGS_3	_DOARGS_3 (12)
#define _DOARGS_3(n)	move.l %d3, %a1; move.l n(%sp), %d3; _DOARGS_2 (n-4)
#define UNDOARGS_3	UNDOARGS_2; move.l %a1, %d3

#define DOARGS_4	_DOARGS_4 (16)
#define _DOARGS_4(n)	move.l %d4, -(%sp); move.l n+4(%sp), %d4; _DOARGS_3 (n)
#define UNDOARGS_4	UNDOARGS_3; move.l (%sp)+, %d4

#define DOARGS_5	_DOARGS_5 (20)
#define _DOARGS_5(n)	move.l %d5, -(%sp); move.l n+4(%sp), %d5; _DOARGS_4 (n)
#define UNDOARGS_5	UNDOARGS_4; move.l (%sp)+, %d5

#define DOARGS_6	_DOARGS_6 (24)
#define _DOARGS_6(n)	_DOARGS_5 (n-4); move.l %a0, -(%sp); move.l n+12(%sp), %a0;
#define UNDOARGS_6	move.l (%sp)+, %a0; UNDOARGS_5


#define	ret	rts
#if 0 /* Not used by Linux */
#define	r0	%d0
#define	r1	%d1
#define	MOVE(x,y)	movel x , y
#endif

#else /* not __ASSEMBLER__ */

/* Define a macro which expands into the inline wrapper code for a system
   call.  */
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...)				\
  ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args);	\
     if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
       {								\
	 __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, ));		\
	 _sys_result = (unsigned int) -1;				\
       }								\
     (int) _sys_result; })

#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)

/* Define a macro which expands inline into the wrapper code for a system
   call.  This use is for internal calls that do not need to handle errors
   normally.  It will never touch errno.  This returns just what the kernel
   gave back.  */
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL_NCS(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") = name;		\
       asm volatile ("trap #0"				\
		     : "=d" (_d0)			\
		     : "0" (_d0) ASM_ARGS_##nr		\
		     : "memory");			\
       _sys_result = _d0;				\
     }							\
     (int) _sys_result; })
#define INTERNAL_SYSCALL(name, err, nr, args...)	\
  INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)

#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err)		\
  ((unsigned int) (val) >= -4095U)

#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err)	(-(val))

#define LOAD_ARGS_0()
#define LOAD_REGS_0
#define ASM_ARGS_0
#define LOAD_ARGS_1(a1)				\
  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)			\
  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)			\
  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)		\
  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)		\
  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)	\
  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__ */

/* Pointer mangling is not yet supported for M68K.  */
#define PTR_MANGLE(var) (void) (var)
#define PTR_DEMANGLE(var) (void) (var)

#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
/* M68K needs system-supplied DSO to access TLS helpers
   even when statically linked.  */
# define NEED_STATIC_SYSINFO_DSO 1
#endif

#endif
Commit	Line	Data
40111cb9 MK	1	/* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004, 2006, 2010
40111cb9 MK	2	Free Software Foundation, Inc.
36e28152 UD	3	This file is part of the GNU C Library.
	4	Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
	5	December 1995.
9298f9e1	6
36e28152	7	The GNU C Library is free software; you can redistribute it and/or
3214b89b AJ	8	modify it under the terms of the GNU Lesser General Public
	9	License as published by the Free Software Foundation; either
	10	version 2.1 of the License, or (at your option) any later version.
9298f9e1	11
36e28152 UD	12	The GNU C Library is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
3214b89b	15	Lesser General Public License for more details.
9298f9e1	16
3214b89b AJ	17	You should have received a copy of the GNU Lesser General Public
	18	License along with the GNU C Library; if not, write to the Free
	19	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	02111-1307 USA. */
9298f9e1	21
9c986f87 AS	22	#ifndef _LINUX_M68K_SYSDEP_H
	23	#define _LINUX_M68K_SYSDEP_H 1
	24
9298f9e1	25	#include <sysdeps/unix/sysdep.h>
56d7f029	26	#include <sysdeps/m68k/sysdep.h>
40111cb9	27	#include <tls.h>
9298f9e1	28
9d3831f3 AS	29	/* Defines RTLD_PRIVATE_ERRNO. */
	30	#include <dl-sysdep.h>
	31
b2801dda RM	32	/* For Linux we can use the system call table in the header file
	33	/usr/include/asm/unistd.h
	34	of the kernel. But these symbols do not follow the SYS_* syntax
	35	so we have to redefine the `SYS_ify' macro here. */
	36	#undef SYS_ify
	37	#ifdef __STDC__
	38	# define SYS_ify(syscall_name) __NR_##syscall_name
	39	#else
	40	# define SYS_ify(syscall_name) __NR_/**/syscall_name
	41	#endif
	42
e0ebc3b2	43	#ifdef __ASSEMBLER__
9298f9e1	44
9298f9e1	45	/* Linux uses a negative return value to indicate syscall errors, unlike
5415516c UD	46	most Unices, which use the condition codes' carry flag.
	47
	48	Since version 2.1 the return value of a system call might be negative
	49	even if the call succeeded. E.g., the `lseek' system call might return
	50	a large offset. Therefore we must not anymore test for < 0, but test
	51	for a real error by making sure the value in %d0 is a real error
dd4b8913	52	number. Linus said he will make sure the no syscall returns a value
6acf09f4	53	in -1 .. -4095 as a valid result so we can savely test with -4095. */
2cd49338 AS	54
	55	/* We don't want the label for the error handler to be visible in the symbol
	56	table when we define it here. */
	57	#ifdef PIC
	58	#define SYSCALL_ERROR_LABEL .Lsyscall_error
	59	#else
	60	#define SYSCALL_ERROR_LABEL __syscall_error
	61	#endif
	62
56d7f029	63	#undef PSEUDO
9298f9e1 RM	64	#define PSEUDO(name, syscall_name, args) \
9298f9e1 RM	65	.text; \
9298f9e1	66	ENTRY (name) \
56d7f029	67	DO_CALL (syscall_name, args); \
6acf09f4	68	cmp.l &-4095, %d0; \
2cd49338	69	jcc SYSCALL_ERROR_LABEL
5415516c UD	70
5415516c UD	71	#undef PSEUDO_END
b8bd7edd UD	72	#define PSEUDO_END(name) \
	73	SYSCALL_ERROR_HANDLER; \
	74	END (name)
9298f9e1	75
98f7320f UD	76	#undef PSEUDO_NOERRNO
	77	#define PSEUDO_NOERRNO(name, syscall_name, args) \
	78	.text; \
	79	ENTRY (name) \
	80	DO_CALL (syscall_name, args)
	81
	82	#undef PSEUDO_END_NOERRNO
	83	#define PSEUDO_END_NOERRNO(name) \
	84	END (name)
	85
fd1f2c4a AS	86	#define ret_NOERRNO rts
	87
	88	/* The function has to return the error code. */
	89	#undef PSEUDO_ERRVAL
	90	#define PSEUDO_ERRVAL(name, syscall_name, args) \
	91	.text; \
	92	ENTRY (name) \
	93	DO_CALL (syscall_name, args); \
	94	negl %d0
	95
	96	#undef PSEUDO_END_ERRVAL
	97	#define PSEUDO_END_ERRVAL(name) \
	98	END (name)
	99
	100	#define ret_ERRVAL rts
64928a88	101
9298f9e1	102	#ifdef PIC
4b5b9a07	103	# if RTLD_PRIVATE_ERRNO
9d3831f3 AS	104	# define SYSCALL_ERROR_HANDLER \
9d3831f3 AS	105	SYSCALL_ERROR_LABEL: \
9c986f87	106	PCREL_OP (lea, rtld_errno, %a0, %a0); \
9d3831f3 AS	107	neg.l %d0; \
	108	move.l %d0, (%a0); \
	109	move.l &-1, %d0; \
	110	/* Copy return value to %a0 for syscalls that are declared to return \
	111	a pointer (e.g., mmap). */ \
	112	move.l %d0, %a0; \
	113	rts;
	114	# else /* !RTLD_PRIVATE_ERRNO */
9298f9e1	115	/* Store (- %d0) into errno through the GOT. */
9d3831f3	116	# if defined _LIBC_REENTRANT
4b5b9a07	117	# define SYSCALL_ERROR_HANDLER \
2cd49338	118	SYSCALL_ERROR_LABEL: \
1c03144c	119	neg.l %d0; \
bf4b3107	120	move.l %d0, -(%sp); \
1120c0ed	121	jbsr __errno_location@PLTPC; \
bf4b3107	122	move.l (%sp)+, (%a0); \
5415516c	123	move.l &-1, %d0; \
9298f9e1 RM	124	/* Copy return value to %a0 for syscalls that are declared to return \
	125	a pointer (e.g., mmap). */ \
	126	move.l %d0, %a0; \
	127	rts;
9d3831f3	128	# else /* !_LIBC_REENTRANT */
4b5b9a07	129	# define SYSCALL_ERROR_HANDLER \
2cd49338	130	SYSCALL_ERROR_LABEL: \
bf4b3107 UD	131	move.l (errno@GOTPC, %pc), %a0; \
	132	neg.l %d0; \
	133	move.l %d0, (%a0); \
5415516c	134	move.l &-1, %d0; \
bf4b3107 UD	135	/* Copy return value to %a0 for syscalls that are declared to return \
	136	a pointer (e.g., mmap). */ \
	137	move.l %d0, %a0; \
	138	rts;
9d3831f3 AS	139	# endif /* _LIBC_REENTRANT */
9d3831f3 AS	140	# endif /* RTLD_PRIVATE_ERRNO */
bf4b3107	141	#else
9d3831f3	142	# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
bf4b3107	143	#endif /* PIC */
9298f9e1 RM	144
	145	/* Linux takes system call arguments in registers:
	146
	147	syscall number %d0 call-clobbered
	148	arg 1 %d1 call-clobbered
	149	arg 2 %d2 call-saved
	150	arg 3 %d3 call-saved
	151	arg 4 %d4 call-saved
	152	arg 5 %d5 call-saved
40111cb9	153	arg 6 %a0 call-clobbered
9298f9e1 RM	154
	155	The stack layout upon entering the function is:
	156
40111cb9	157	24(%sp) Arg# 6
9298f9e1 RM	158	20(%sp) Arg# 5
	159	16(%sp) Arg# 4
	160	12(%sp) Arg# 3
	161	8(%sp) Arg# 2
	162	4(%sp) Arg# 1
	163	(%sp) Return address
	164
	165	(Of course a function with say 3 arguments does not have entries for
	166	arguments 4 and 5.)
	167
	168	Separate move's are faster than movem, but need more space. Since
	169	speed is more important, we don't use movem. Since %a0 and %a1 are
	170	scratch registers, we can use them for saving as well. */
	171
56d7f029 AS	172	#define DO_CALL(syscall_name, args) \
56d7f029 AS	173	move.l &SYS_ify(syscall_name), %d0; \
9298f9e1	174	DOARGS_##args \
5415516c	175	trap &0; \
9298f9e1 RM	176	UNDOARGS_##args
	177
	178	#define DOARGS_0 /* No arguments to frob. */
	179	#define UNDOARGS_0 /* No arguments to unfrob. */
	180	#define _DOARGS_0(n) /* No arguments to frob. */
	181
	182	#define DOARGS_1 _DOARGS_1 (4)
	183	#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
	184	#define UNDOARGS_1 UNDOARGS_0
	185
	186	#define DOARGS_2 _DOARGS_2 (8)
	187	#define _DOARGS_2(n) move.l %d2, %a0; move.l n(%sp), %d2; _DOARGS_1 (n-4)
	188	#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2
	189
	190	#define DOARGS_3 _DOARGS_3 (12)
	191	#define _DOARGS_3(n) move.l %d3, %a1; move.l n(%sp), %d3; _DOARGS_2 (n-4)
	192	#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3
	193
	194	#define DOARGS_4 _DOARGS_4 (16)
	195	#define _DOARGS_4(n) move.l %d4, -(%sp); move.l n+4(%sp), %d4; _DOARGS_3 (n)
	196	#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4
	197
	198	#define DOARGS_5 _DOARGS_5 (20)
	199	#define _DOARGS_5(n) move.l %d5, -(%sp); move.l n+4(%sp), %d5; _DOARGS_4 (n)
	200	#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5
	201
5dde0182 AS	202	#define DOARGS_6 _DOARGS_6 (24)
	203	#define _DOARGS_6(n) _DOARGS_5 (n-4); move.l %a0, -(%sp); move.l n+12(%sp), %a0;
	204	#define UNDOARGS_6 move.l (%sp)+, %a0; UNDOARGS_5
	205
9298f9e1 RM	206
	207	#define ret rts
	208	#if 0 /* Not used by Linux */
	209	#define r0 %d0
	210	#define r1 %d1
	211	#define MOVE(x,y) movel x , y
	212	#endif
	213
dca17080 AS	214	#else /* not __ASSEMBLER__ */
	215
	216	/* Define a macro which expands into the inline wrapper code for a system
	217	call. */
	218	#undef INLINE_SYSCALL
5d384858	219	#define INLINE_SYSCALL(name, nr, args...) \
aeeec7fb UD	220	({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
aeeec7fb UD	221	if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
5d384858	222	{ \
aeeec7fb	223	__set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
5d384858 AS	224	_sys_result = (unsigned int) -1; \
	225	} \
	226	(int) _sys_result; })
	227
aeeec7fb UD	228	#undef INTERNAL_SYSCALL_DECL
	229	#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
	230
5d384858 AS	231	/* Define a macro which expands inline into the wrapper code for a system
	232	call. This use is for internal calls that do not need to handle errors
	233	normally. It will never touch errno. This returns just what the kernel
	234	gave back. */
	235	#undef INTERNAL_SYSCALL
40111cb9	236	#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
dca17080 AS	237	({ unsigned int _sys_result; \
dca17080 AS	238	{ \
693687e6 AS	239	/* Load argument values in temporary variables
	240	to perform side effects like function calls
	241	before the call used registers are set. */ \
dca17080	242	LOAD_ARGS_##nr (args) \
693687e6	243	LOAD_REGS_##nr \
40111cb9	244	register int _d0 asm ("%d0") = name; \
dca17080 AS	245	asm volatile ("trap #0" \
dca17080 AS	246	: "=d" (_d0) \
ec2a735f	247	: "0" (_d0) ASM_ARGS_##nr \
48bfe445	248	: "memory"); \
dca17080 AS	249	_sys_result = _d0; \
dca17080 AS	250	} \
dca17080	251	(int) _sys_result; })
40111cb9 MK	252	#define INTERNAL_SYSCALL(name, err, nr, args...) \
40111cb9 MK	253	INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
dca17080	254
5d384858	255	#undef INTERNAL_SYSCALL_ERROR_P
aeeec7fb UD	256	#define INTERNAL_SYSCALL_ERROR_P(val, err) \
aeeec7fb UD	257	((unsigned int) (val) >= -4095U)
5d384858 AS	258
5d384858 AS	259	#undef INTERNAL_SYSCALL_ERRNO
aeeec7fb	260	#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
5d384858	261
dca17080	262	#define LOAD_ARGS_0()
693687e6	263	#define LOAD_REGS_0
dca17080 AS	264	#define ASM_ARGS_0
dca17080 AS	265	#define LOAD_ARGS_1(a1) \
693687e6 AS	266	LOAD_ARGS_0 () \
	267	int __arg1 = (int) (a1);
	268	#define LOAD_REGS_1 \
	269	register int _d1 asm ("d1") = __arg1; \
	270	LOAD_REGS_0
dca17080 AS	271	#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
dca17080 AS	272	#define LOAD_ARGS_2(a1, a2) \
693687e6 AS	273	LOAD_ARGS_1 (a1) \
	274	int __arg2 = (int) (a2);
	275	#define LOAD_REGS_2 \
	276	register int _d2 asm ("d2") = __arg2; \
	277	LOAD_REGS_1
dca17080 AS	278	#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
dca17080 AS	279	#define LOAD_ARGS_3(a1, a2, a3) \
693687e6 AS	280	LOAD_ARGS_2 (a1, a2) \
	281	int __arg3 = (int) (a3);
	282	#define LOAD_REGS_3 \
	283	register int _d3 asm ("d3") = __arg3; \
	284	LOAD_REGS_2
dca17080 AS	285	#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
dca17080 AS	286	#define LOAD_ARGS_4(a1, a2, a3, a4) \
693687e6 AS	287	LOAD_ARGS_3 (a1, a2, a3) \
	288	int __arg4 = (int) (a4);
	289	#define LOAD_REGS_4 \
	290	register int _d4 asm ("d4") = __arg4; \
	291	LOAD_REGS_3
dca17080 AS	292	#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
dca17080 AS	293	#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
693687e6 AS	294	LOAD_ARGS_4 (a1, a2, a3, a4) \
	295	int __arg5 = (int) (a5);
	296	#define LOAD_REGS_5 \
	297	register int _d5 asm ("d5") = __arg5; \
	298	LOAD_REGS_4
dca17080	299	#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
0798f1ad	300	#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
693687e6 AS	301	LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
	302	int __arg6 = (int) (a6);
	303	#define LOAD_REGS_6 \
	304	register int _a0 asm ("a0") = __arg6; \
	305	LOAD_REGS_5
0798f1ad	306	#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
dca17080 AS	307
dca17080 AS	308	#endif /* not __ASSEMBLER__ */
40111cb9 MK	309
	310	/* Pointer mangling is not yet supported for M68K. */
	311	#define PTR_MANGLE(var) (void) (var)
	312	#define PTR_DEMANGLE(var) (void) (var)
	313
	314	#if defined NEED_DL_SYSINFO \|\| defined NEED_DL_SYSINFO_DSO
	315	/* M68K needs system-supplied DSO to access TLS helpers
	316	even when statically linked. */
	317	# define NEED_STATIC_SYSINFO_DSO 1
	318	#endif
	319
9c986f87	320	#endif