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

/* Copyright (C) 1996-2019 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, see
   <https://www.gnu.org/licenses/>.  */

#include <sysdeps/unix/sysv/linux/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
#define SYS_ify(syscall_name)	__NR_##syscall_name

#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;
# elif defined _LIBC_REENTRANT
#  if IS_IN (libc)
#   define SYSCALL_ERROR_ERRNO __libc_errno
#  else
#   define SYSCALL_ERROR_ERRNO errno
#  endif
#  define SYSCALL_ERROR_HANDLER						      \
SYSCALL_ERROR_LABEL:							      \
    neg.l %d0;								      \
    move.l %d0, -(%sp);							      \
    cfi_adjust_cfa_offset (4);						      \
    jbsr __m68k_read_tp@PLTPC;						      \
    SYSCALL_ERROR_LOAD_GOT (%a1);					      \
    add.l (SYSCALL_ERROR_ERRNO@TLSIE, %a1), %a0;			      \
    move.l (%sp)+, (%a0);						      \
    cfi_adjust_cfa_offset (-4);						      \
    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 */
/* Store (- %d0) into errno through the GOT.  */
#  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 */
#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; cfi_register (%d2, %a0);	      \
			move.l n(%sp), %d2; _DOARGS_1 (n-4)
#define	UNDOARGS_2	UNDOARGS_1; move.l %a0, %d2; cfi_restore (%d2)

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

#define DOARGS_4	_DOARGS_4 (16)
#define _DOARGS_4(n)	move.l %d4, -(%sp);				      \
			cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0);   \
			move.l n+4(%sp), %d4; _DOARGS_3 (n)
#define UNDOARGS_4	UNDOARGS_3; move.l (%sp)+, %d4;			      \
			cfi_adjust_cfa_offset (-4); cfi_restore (%d4)

#define DOARGS_5	_DOARGS_5 (20)
#define _DOARGS_5(n)	move.l %d5, -(%sp); 				      \
			cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0);   \
			move.l n+4(%sp), %d5; _DOARGS_4 (n)
#define UNDOARGS_5	UNDOARGS_4; move.l (%sp)+, %d5;			      \
			cfi_adjust_cfa_offset (-4); cfi_restore (%d5)

#define DOARGS_6	_DOARGS_6 (24)
#define _DOARGS_6(n)	_DOARGS_5 (n-4); move.l %a0, -(%sp);		      \
			cfi_adjust_cfa_offset (4);			      \
			move.l n+12(%sp), %a0;
#define UNDOARGS_6	move.l (%sp)+, %a0; cfi_adjust_cfa_offset (-4);	      \
			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
Commit	Line	Data
04277e02	1	/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
36e28152 UD	2	This file is part of the GNU C Library.
	3	Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
	4	December 1995.
9298f9e1	5
36e28152	6	The GNU C Library is free software; you can redistribute it and/or
3214b89b AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
9298f9e1	10
36e28152 UD	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
3214b89b	14	Lesser General Public License for more details.
9298f9e1	15
3214b89b	16	You should have received a copy of the GNU Lesser General Public
ab84e3ff	17	License along with the GNU C Library. If not, see
5a82c748	18	<https://www.gnu.org/licenses/>. */
9298f9e1	19
fb1cf108	20	#include <sysdeps/unix/sysv/linux/sysdep.h>
40111cb9	21	#include <tls.h>
9298f9e1	22
9d3831f3 AS	23	/* Defines RTLD_PRIVATE_ERRNO. */
	24	#include <dl-sysdep.h>
	25
b2801dda RM	26	/* For Linux we can use the system call table in the header file
	27	/usr/include/asm/unistd.h
	28	of the kernel. But these symbols do not follow the SYS_* syntax
	29	so we have to redefine the `SYS_ify' macro here. */
	30	#undef SYS_ify
53bce1b5	31	#define SYS_ify(syscall_name) __NR_##syscall_name
b2801dda	32
e0ebc3b2	33	#ifdef __ASSEMBLER__
9298f9e1	34
9298f9e1	35	/* Linux uses a negative return value to indicate syscall errors, unlike
5415516c UD	36	most Unices, which use the condition codes' carry flag.
	37
	38	Since version 2.1 the return value of a system call might be negative
	39	even if the call succeeded. E.g., the `lseek' system call might return
	40	a large offset. Therefore we must not anymore test for < 0, but test
	41	for a real error by making sure the value in %d0 is a real error
dd4b8913	42	number. Linus said he will make sure the no syscall returns a value
6acf09f4	43	in -1 .. -4095 as a valid result so we can savely test with -4095. */
2cd49338 AS	44
	45	/* We don't want the label for the error handler to be visible in the symbol
	46	table when we define it here. */
	47	#ifdef PIC
	48	#define SYSCALL_ERROR_LABEL .Lsyscall_error
	49	#else
	50	#define SYSCALL_ERROR_LABEL __syscall_error
	51	#endif
	52
56d7f029	53	#undef PSEUDO
9298f9e1 RM	54	#define PSEUDO(name, syscall_name, args) \
9298f9e1 RM	55	.text; \
9298f9e1	56	ENTRY (name) \
56d7f029	57	DO_CALL (syscall_name, args); \
6acf09f4	58	cmp.l &-4095, %d0; \
2cd49338	59	jcc SYSCALL_ERROR_LABEL
5415516c UD	60
5415516c UD	61	#undef PSEUDO_END
b8bd7edd UD	62	#define PSEUDO_END(name) \
	63	SYSCALL_ERROR_HANDLER; \
	64	END (name)
9298f9e1	65
98f7320f UD	66	#undef PSEUDO_NOERRNO
	67	#define PSEUDO_NOERRNO(name, syscall_name, args) \
	68	.text; \
	69	ENTRY (name) \
	70	DO_CALL (syscall_name, args)
	71
	72	#undef PSEUDO_END_NOERRNO
	73	#define PSEUDO_END_NOERRNO(name) \
	74	END (name)
	75
fd1f2c4a AS	76	#define ret_NOERRNO rts
	77
	78	/* The function has to return the error code. */
	79	#undef PSEUDO_ERRVAL
	80	#define PSEUDO_ERRVAL(name, syscall_name, args) \
	81	.text; \
	82	ENTRY (name) \
	83	DO_CALL (syscall_name, args); \
	84	negl %d0
	85
	86	#undef PSEUDO_END_ERRVAL
	87	#define PSEUDO_END_ERRVAL(name) \
	88	END (name)
	89
	90	#define ret_ERRVAL rts
64928a88	91
9298f9e1	92	#ifdef PIC
4b5b9a07	93	# if RTLD_PRIVATE_ERRNO
9d3831f3 AS	94	# define SYSCALL_ERROR_HANDLER \
9d3831f3 AS	95	SYSCALL_ERROR_LABEL: \
9c986f87	96	PCREL_OP (lea, rtld_errno, %a0, %a0); \
9d3831f3 AS	97	neg.l %d0; \
	98	move.l %d0, (%a0); \
	99	move.l &-1, %d0; \
	100	/* Copy return value to %a0 for syscalls that are declared to return \
	101	a pointer (e.g., mmap). */ \
	102	move.l %d0, %a0; \
	103	rts;
df62b0cd	104	# elif defined _LIBC_REENTRANT
4f41c682	105	# if IS_IN (libc)
dbd0094b AS	106	# define SYSCALL_ERROR_ERRNO __libc_errno
	107	# else
	108	# define SYSCALL_ERROR_ERRNO errno
	109	# endif
	110	# define SYSCALL_ERROR_HANDLER \
	111	SYSCALL_ERROR_LABEL: \
	112	neg.l %d0; \
	113	move.l %d0, -(%sp); \
50e73d13	114	cfi_adjust_cfa_offset (4); \
dbd0094b	115	jbsr __m68k_read_tp@PLTPC; \
690d264a	116	SYSCALL_ERROR_LOAD_GOT (%a1); \
dbd0094b AS	117	add.l (SYSCALL_ERROR_ERRNO@TLSIE, %a1), %a0; \
dbd0094b AS	118	move.l (%sp)+, (%a0); \
50e73d13	119	cfi_adjust_cfa_offset (-4); \
dbd0094b AS	120	move.l &-1, %d0; \
	121	/* Copy return value to %a0 for syscalls that are declared to return \
	122	a pointer (e.g., mmap). */ \
	123	move.l %d0, %a0; \
	124	rts;
dbd0094b AS	125	# else /* !_LIBC_REENTRANT */
	126	/* Store (- %d0) into errno through the GOT. */
	127	# define SYSCALL_ERROR_HANDLER \
2cd49338	128	SYSCALL_ERROR_LABEL: \
bf4b3107 UD	129	move.l (errno@GOTPC, %pc), %a0; \
	130	neg.l %d0; \
	131	move.l %d0, (%a0); \
5415516c	132	move.l &-1, %d0; \
bf4b3107 UD	133	/* Copy return value to %a0 for syscalls that are declared to return \
	134	a pointer (e.g., mmap). */ \
	135	move.l %d0, %a0; \
	136	rts;
dbd0094b	137	# endif /* _LIBC_REENTRANT */
bf4b3107	138	#else
9d3831f3	139	# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
bf4b3107	140	#endif /* PIC */
9298f9e1 RM	141
	142	/* Linux takes system call arguments in registers:
	143
	144	syscall number %d0 call-clobbered
	145	arg 1 %d1 call-clobbered
	146	arg 2 %d2 call-saved
	147	arg 3 %d3 call-saved
	148	arg 4 %d4 call-saved
	149	arg 5 %d5 call-saved
40111cb9	150	arg 6 %a0 call-clobbered
9298f9e1 RM	151
	152	The stack layout upon entering the function is:
	153
40111cb9	154	24(%sp) Arg# 6
9298f9e1 RM	155	20(%sp) Arg# 5
	156	16(%sp) Arg# 4
	157	12(%sp) Arg# 3
	158	8(%sp) Arg# 2
	159	4(%sp) Arg# 1
	160	(%sp) Return address
	161
	162	(Of course a function with say 3 arguments does not have entries for
	163	arguments 4 and 5.)
	164
	165	Separate move's are faster than movem, but need more space. Since
	166	speed is more important, we don't use movem. Since %a0 and %a1 are
	167	scratch registers, we can use them for saving as well. */
	168
56d7f029 AS	169	#define DO_CALL(syscall_name, args) \
56d7f029 AS	170	move.l &SYS_ify(syscall_name), %d0; \
9298f9e1	171	DOARGS_##args \
5415516c	172	trap &0; \
9298f9e1 RM	173	UNDOARGS_##args
	174
	175	#define DOARGS_0 /* No arguments to frob. */
	176	#define UNDOARGS_0 /* No arguments to unfrob. */
	177	#define _DOARGS_0(n) /* No arguments to frob. */
	178
	179	#define DOARGS_1 _DOARGS_1 (4)
	180	#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
	181	#define UNDOARGS_1 UNDOARGS_0
	182
	183	#define DOARGS_2 _DOARGS_2 (8)
50e73d13 AS	184	#define _DOARGS_2(n) move.l %d2, %a0; cfi_register (%d2, %a0); \
	185	move.l n(%sp), %d2; _DOARGS_1 (n-4)
	186	#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2; cfi_restore (%d2)
9298f9e1 RM	187
9298f9e1 RM	188	#define DOARGS_3 _DOARGS_3 (12)
50e73d13 AS	189	#define _DOARGS_3(n) move.l %d3, %a1; cfi_register (%d3, %a1); \
	190	move.l n(%sp), %d3; _DOARGS_2 (n-4)
	191	#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3; cfi_restore (%d3)
9298f9e1 RM	192
9298f9e1 RM	193	#define DOARGS_4 _DOARGS_4 (16)
50e73d13 AS	194	#define _DOARGS_4(n) move.l %d4, -(%sp); \
	195	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \
	196	move.l n+4(%sp), %d4; _DOARGS_3 (n)
	197	#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4; \
	198	cfi_adjust_cfa_offset (-4); cfi_restore (%d4)
9298f9e1 RM	199
9298f9e1 RM	200	#define DOARGS_5 _DOARGS_5 (20)
50e73d13 AS	201	#define _DOARGS_5(n) move.l %d5, -(%sp); \
	202	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \
	203	move.l n+4(%sp), %d5; _DOARGS_4 (n)
	204	#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5; \
	205	cfi_adjust_cfa_offset (-4); cfi_restore (%d5)
9298f9e1	206
5dde0182	207	#define DOARGS_6 _DOARGS_6 (24)
50e73d13 AS	208	#define _DOARGS_6(n) _DOARGS_5 (n-4); move.l %a0, -(%sp); \
	209	cfi_adjust_cfa_offset (4); \
	210	move.l n+12(%sp), %a0;
	211	#define UNDOARGS_6 move.l (%sp)+, %a0; cfi_adjust_cfa_offset (-4); \
	212	UNDOARGS_5
5dde0182	213
9298f9e1 RM	214
	215	#define ret rts
	216	#if 0 /* Not used by Linux */
	217	#define r0 %d0
	218	#define r1 %d1
	219	#define MOVE(x,y) movel x , y
	220	#endif
	221
dca17080 AS	222	#else /* not __ASSEMBLER__ */
	223
	224	/* Define a macro which expands into the inline wrapper code for a system
	225	call. */
	226	#undef INLINE_SYSCALL
5d384858	227	#define INLINE_SYSCALL(name, nr, args...) \
aeeec7fb UD	228	({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
aeeec7fb UD	229	if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
5d384858	230	{ \
aeeec7fb	231	__set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
5d384858 AS	232	_sys_result = (unsigned int) -1; \
	233	} \
	234	(int) _sys_result; })
	235
aeeec7fb UD	236	#undef INTERNAL_SYSCALL_DECL
	237	#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
	238
5d384858 AS	239	/* Define a macro which expands inline into the wrapper code for a system
	240	call. This use is for internal calls that do not need to handle errors
	241	normally. It will never touch errno. This returns just what the kernel
	242	gave back. */
	243	#undef INTERNAL_SYSCALL
40111cb9	244	#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
dca17080 AS	245	({ unsigned int _sys_result; \
dca17080 AS	246	{ \
693687e6 AS	247	/* Load argument values in temporary variables
	248	to perform side effects like function calls
	249	before the call used registers are set. */ \
dca17080	250	LOAD_ARGS_##nr (args) \
693687e6	251	LOAD_REGS_##nr \
40111cb9	252	register int _d0 asm ("%d0") = name; \
dca17080 AS	253	asm volatile ("trap #0" \
dca17080 AS	254	: "=d" (_d0) \
ec2a735f	255	: "0" (_d0) ASM_ARGS_##nr \
48bfe445	256	: "memory"); \
dca17080 AS	257	_sys_result = _d0; \
dca17080 AS	258	} \
dca17080	259	(int) _sys_result; })
40111cb9 MK	260	#define INTERNAL_SYSCALL(name, err, nr, args...) \
40111cb9 MK	261	INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
dca17080	262
5d384858	263	#undef INTERNAL_SYSCALL_ERROR_P
aeeec7fb UD	264	#define INTERNAL_SYSCALL_ERROR_P(val, err) \
aeeec7fb UD	265	((unsigned int) (val) >= -4095U)
5d384858 AS	266
5d384858 AS	267	#undef INTERNAL_SYSCALL_ERRNO
aeeec7fb	268	#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
5d384858	269
dca17080	270	#define LOAD_ARGS_0()
693687e6	271	#define LOAD_REGS_0
dca17080 AS	272	#define ASM_ARGS_0
dca17080 AS	273	#define LOAD_ARGS_1(a1) \
693687e6 AS	274	LOAD_ARGS_0 () \
	275	int __arg1 = (int) (a1);
	276	#define LOAD_REGS_1 \
	277	register int _d1 asm ("d1") = __arg1; \
	278	LOAD_REGS_0
dca17080 AS	279	#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
dca17080 AS	280	#define LOAD_ARGS_2(a1, a2) \
693687e6 AS	281	LOAD_ARGS_1 (a1) \
	282	int __arg2 = (int) (a2);
	283	#define LOAD_REGS_2 \
	284	register int _d2 asm ("d2") = __arg2; \
	285	LOAD_REGS_1
dca17080 AS	286	#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
dca17080 AS	287	#define LOAD_ARGS_3(a1, a2, a3) \
693687e6 AS	288	LOAD_ARGS_2 (a1, a2) \
	289	int __arg3 = (int) (a3);
	290	#define LOAD_REGS_3 \
	291	register int _d3 asm ("d3") = __arg3; \
	292	LOAD_REGS_2
dca17080 AS	293	#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
dca17080 AS	294	#define LOAD_ARGS_4(a1, a2, a3, a4) \
693687e6 AS	295	LOAD_ARGS_3 (a1, a2, a3) \
	296	int __arg4 = (int) (a4);
	297	#define LOAD_REGS_4 \
	298	register int _d4 asm ("d4") = __arg4; \
	299	LOAD_REGS_3
dca17080 AS	300	#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
dca17080 AS	301	#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
693687e6 AS	302	LOAD_ARGS_4 (a1, a2, a3, a4) \
	303	int __arg5 = (int) (a5);
	304	#define LOAD_REGS_5 \
	305	register int _d5 asm ("d5") = __arg5; \
	306	LOAD_REGS_4
dca17080	307	#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
0798f1ad	308	#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
693687e6 AS	309	LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
	310	int __arg6 = (int) (a6);
	311	#define LOAD_REGS_6 \
	312	register int _a0 asm ("a0") = __arg6; \
	313	LOAD_REGS_5
0798f1ad	314	#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
dca17080 AS	315
dca17080 AS	316	#endif /* not __ASSEMBLER__ */
40111cb9 MK	317
	318	/* Pointer mangling is not yet supported for M68K. */
	319	#define PTR_MANGLE(var) (void) (var)
	320	#define PTR_DEMANGLE(var) (void) (var)
	321
	322	#if defined NEED_DL_SYSINFO \|\| defined NEED_DL_SYSINFO_DSO
	323	/* M68K needs system-supplied DSO to access TLS helpers
	324	even when statically linked. */
	325	# define NEED_STATIC_SYSINFO_DSO 1
	326	#endif