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

/* Copyright (C) 1996-2021 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.  */
#undef SYSCALL_ERROR_LABEL
#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 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, 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, nr, args...)	\
  INTERNAL_SYSCALL_NCS (__NR_##name, nr, ##args)

#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)

#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL
#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1

#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
2b778ceb	1	/* Copyright (C) 1996-2021 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. */
fcb78a55	47	#undef SYSCALL_ERROR_LABEL
2cd49338 AS	48	#ifdef PIC
	49	#define SYSCALL_ERROR_LABEL .Lsyscall_error
	50	#else
	51	#define SYSCALL_ERROR_LABEL __syscall_error
	52	#endif
	53
56d7f029	54	#undef PSEUDO
9298f9e1 RM	55	#define PSEUDO(name, syscall_name, args) \
9298f9e1 RM	56	.text; \
9298f9e1	57	ENTRY (name) \
56d7f029	58	DO_CALL (syscall_name, args); \
6acf09f4	59	cmp.l &-4095, %d0; \
2cd49338	60	jcc SYSCALL_ERROR_LABEL
5415516c UD	61
5415516c UD	62	#undef PSEUDO_END
b8bd7edd UD	63	#define PSEUDO_END(name) \
	64	SYSCALL_ERROR_HANDLER; \
	65	END (name)
9298f9e1	66
98f7320f UD	67	#undef PSEUDO_NOERRNO
	68	#define PSEUDO_NOERRNO(name, syscall_name, args) \
	69	.text; \
	70	ENTRY (name) \
	71	DO_CALL (syscall_name, args)
	72
	73	#undef PSEUDO_END_NOERRNO
	74	#define PSEUDO_END_NOERRNO(name) \
	75	END (name)
	76
fd1f2c4a AS	77	#define ret_NOERRNO rts
	78
	79	/* The function has to return the error code. */
	80	#undef PSEUDO_ERRVAL
	81	#define PSEUDO_ERRVAL(name, syscall_name, args) \
	82	.text; \
	83	ENTRY (name) \
	84	DO_CALL (syscall_name, args); \
	85	negl %d0
	86
	87	#undef PSEUDO_END_ERRVAL
	88	#define PSEUDO_END_ERRVAL(name) \
	89	END (name)
	90
	91	#define ret_ERRVAL rts
64928a88	92
9298f9e1	93	#ifdef PIC
4b5b9a07	94	# if RTLD_PRIVATE_ERRNO
9d3831f3 AS	95	# define SYSCALL_ERROR_HANDLER \
9d3831f3 AS	96	SYSCALL_ERROR_LABEL: \
9c986f87	97	PCREL_OP (lea, rtld_errno, %a0, %a0); \
9d3831f3 AS	98	neg.l %d0; \
	99	move.l %d0, (%a0); \
	100	move.l &-1, %d0; \
	101	/* Copy return value to %a0 for syscalls that are declared to return \
	102	a pointer (e.g., mmap). */ \
	103	move.l %d0, %a0; \
	104	rts;
df62b0cd	105	# elif defined _LIBC_REENTRANT
4f41c682	106	# if IS_IN (libc)
dbd0094b AS	107	# define SYSCALL_ERROR_ERRNO __libc_errno
	108	# else
	109	# define SYSCALL_ERROR_ERRNO errno
	110	# endif
	111	# define SYSCALL_ERROR_HANDLER \
	112	SYSCALL_ERROR_LABEL: \
	113	neg.l %d0; \
	114	move.l %d0, -(%sp); \
50e73d13	115	cfi_adjust_cfa_offset (4); \
dbd0094b	116	jbsr __m68k_read_tp@PLTPC; \
690d264a	117	SYSCALL_ERROR_LOAD_GOT (%a1); \
dbd0094b AS	118	add.l (SYSCALL_ERROR_ERRNO@TLSIE, %a1), %a0; \
dbd0094b AS	119	move.l (%sp)+, (%a0); \
50e73d13	120	cfi_adjust_cfa_offset (-4); \
dbd0094b AS	121	move.l &-1, %d0; \
	122	/* Copy return value to %a0 for syscalls that are declared to return \
	123	a pointer (e.g., mmap). */ \
	124	move.l %d0, %a0; \
	125	rts;
dbd0094b AS	126	# else /* !_LIBC_REENTRANT */
	127	/* Store (- %d0) into errno through the GOT. */
	128	# define SYSCALL_ERROR_HANDLER \
2cd49338	129	SYSCALL_ERROR_LABEL: \
bf4b3107 UD	130	move.l (errno@GOTPC, %pc), %a0; \
	131	neg.l %d0; \
	132	move.l %d0, (%a0); \
5415516c	133	move.l &-1, %d0; \
bf4b3107 UD	134	/* Copy return value to %a0 for syscalls that are declared to return \
	135	a pointer (e.g., mmap). */ \
	136	move.l %d0, %a0; \
	137	rts;
dbd0094b	138	# endif /* _LIBC_REENTRANT */
bf4b3107	139	#else
9d3831f3	140	# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
bf4b3107	141	#endif /* PIC */
9298f9e1 RM	142
	143	/* Linux takes system call arguments in registers:
	144
	145	syscall number %d0 call-clobbered
	146	arg 1 %d1 call-clobbered
	147	arg 2 %d2 call-saved
	148	arg 3 %d3 call-saved
	149	arg 4 %d4 call-saved
	150	arg 5 %d5 call-saved
40111cb9	151	arg 6 %a0 call-clobbered
9298f9e1 RM	152
	153	The stack layout upon entering the function is:
	154
40111cb9	155	24(%sp) Arg# 6
9298f9e1 RM	156	20(%sp) Arg# 5
	157	16(%sp) Arg# 4
	158	12(%sp) Arg# 3
	159	8(%sp) Arg# 2
	160	4(%sp) Arg# 1
	161	(%sp) Return address
	162
	163	(Of course a function with say 3 arguments does not have entries for
	164	arguments 4 and 5.)
	165
	166	Separate move's are faster than movem, but need more space. Since
	167	speed is more important, we don't use movem. Since %a0 and %a1 are
	168	scratch registers, we can use them for saving as well. */
	169
56d7f029 AS	170	#define DO_CALL(syscall_name, args) \
56d7f029 AS	171	move.l &SYS_ify(syscall_name), %d0; \
9298f9e1	172	DOARGS_##args \
5415516c	173	trap &0; \
9298f9e1 RM	174	UNDOARGS_##args
	175
	176	#define DOARGS_0 /* No arguments to frob. */
	177	#define UNDOARGS_0 /* No arguments to unfrob. */
	178	#define _DOARGS_0(n) /* No arguments to frob. */
	179
	180	#define DOARGS_1 _DOARGS_1 (4)
	181	#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
	182	#define UNDOARGS_1 UNDOARGS_0
	183
	184	#define DOARGS_2 _DOARGS_2 (8)
50e73d13 AS	185	#define _DOARGS_2(n) move.l %d2, %a0; cfi_register (%d2, %a0); \
	186	move.l n(%sp), %d2; _DOARGS_1 (n-4)
	187	#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2; cfi_restore (%d2)
9298f9e1 RM	188
9298f9e1 RM	189	#define DOARGS_3 _DOARGS_3 (12)
50e73d13 AS	190	#define _DOARGS_3(n) move.l %d3, %a1; cfi_register (%d3, %a1); \
	191	move.l n(%sp), %d3; _DOARGS_2 (n-4)
	192	#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3; cfi_restore (%d3)
9298f9e1 RM	193
9298f9e1 RM	194	#define DOARGS_4 _DOARGS_4 (16)
50e73d13 AS	195	#define _DOARGS_4(n) move.l %d4, -(%sp); \
	196	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \
	197	move.l n+4(%sp), %d4; _DOARGS_3 (n)
	198	#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4; \
	199	cfi_adjust_cfa_offset (-4); cfi_restore (%d4)
9298f9e1 RM	200
9298f9e1 RM	201	#define DOARGS_5 _DOARGS_5 (20)
50e73d13 AS	202	#define _DOARGS_5(n) move.l %d5, -(%sp); \
	203	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \
	204	move.l n+4(%sp), %d5; _DOARGS_4 (n)
	205	#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5; \
	206	cfi_adjust_cfa_offset (-4); cfi_restore (%d5)
9298f9e1	207
5dde0182	208	#define DOARGS_6 _DOARGS_6 (24)
50e73d13 AS	209	#define _DOARGS_6(n) _DOARGS_5 (n-4); move.l %a0, -(%sp); \
	210	cfi_adjust_cfa_offset (4); \
	211	move.l n+12(%sp), %a0;
	212	#define UNDOARGS_6 move.l (%sp)+, %a0; cfi_adjust_cfa_offset (-4); \
	213	UNDOARGS_5
5dde0182	214
9298f9e1 RM	215
	216	#define ret rts
	217	#if 0 /* Not used by Linux */
	218	#define r0 %d0
	219	#define r1 %d1
	220	#define MOVE(x,y) movel x , y
	221	#endif
	222
dca17080 AS	223	#else /* not __ASSEMBLER__ */
dca17080 AS	224
5d384858 AS	225	/* Define a macro which expands inline into the wrapper code for a system
	226	call. This use is for internal calls that do not need to handle errors
	227	normally. It will never touch errno. This returns just what the kernel
	228	gave back. */
	229	#undef INTERNAL_SYSCALL
bc2eb932	230	#define INTERNAL_SYSCALL_NCS(name, nr, args...) \
dca17080 AS	231	({ unsigned int _sys_result; \
dca17080 AS	232	{ \
693687e6 AS	233	/* Load argument values in temporary variables
	234	to perform side effects like function calls
	235	before the call used registers are set. */ \
dca17080	236	LOAD_ARGS_##nr (args) \
693687e6	237	LOAD_REGS_##nr \
40111cb9	238	register int _d0 asm ("%d0") = name; \
dca17080 AS	239	asm volatile ("trap #0" \
dca17080 AS	240	: "=d" (_d0) \
ec2a735f	241	: "0" (_d0) ASM_ARGS_##nr \
48bfe445	242	: "memory"); \
dca17080 AS	243	_sys_result = _d0; \
dca17080 AS	244	} \
dca17080	245	(int) _sys_result; })
bc2eb932 AZ	246	#define INTERNAL_SYSCALL(name, nr, args...) \
bc2eb932 AZ	247	INTERNAL_SYSCALL_NCS (__NR_##name, nr, ##args)
dca17080 AS	248
dca17080 AS	249	#define LOAD_ARGS_0()
693687e6	250	#define LOAD_REGS_0
dca17080 AS	251	#define ASM_ARGS_0
dca17080 AS	252	#define LOAD_ARGS_1(a1) \
693687e6 AS	253	LOAD_ARGS_0 () \
	254	int __arg1 = (int) (a1);
	255	#define LOAD_REGS_1 \
	256	register int _d1 asm ("d1") = __arg1; \
	257	LOAD_REGS_0
dca17080 AS	258	#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
dca17080 AS	259	#define LOAD_ARGS_2(a1, a2) \
693687e6 AS	260	LOAD_ARGS_1 (a1) \
	261	int __arg2 = (int) (a2);
	262	#define LOAD_REGS_2 \
	263	register int _d2 asm ("d2") = __arg2; \
	264	LOAD_REGS_1
dca17080 AS	265	#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
dca17080 AS	266	#define LOAD_ARGS_3(a1, a2, a3) \
693687e6 AS	267	LOAD_ARGS_2 (a1, a2) \
	268	int __arg3 = (int) (a3);
	269	#define LOAD_REGS_3 \
	270	register int _d3 asm ("d3") = __arg3; \
	271	LOAD_REGS_2
dca17080 AS	272	#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
dca17080 AS	273	#define LOAD_ARGS_4(a1, a2, a3, a4) \
693687e6 AS	274	LOAD_ARGS_3 (a1, a2, a3) \
	275	int __arg4 = (int) (a4);
	276	#define LOAD_REGS_4 \
	277	register int _d4 asm ("d4") = __arg4; \
	278	LOAD_REGS_3
dca17080 AS	279	#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
dca17080 AS	280	#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
693687e6 AS	281	LOAD_ARGS_4 (a1, a2, a3, a4) \
	282	int __arg5 = (int) (a5);
	283	#define LOAD_REGS_5 \
	284	register int _d5 asm ("d5") = __arg5; \
	285	LOAD_REGS_4
dca17080	286	#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
0798f1ad	287	#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
693687e6 AS	288	LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
	289	int __arg6 = (int) (a6);
	290	#define LOAD_REGS_6 \
	291	register int _a0 asm ("a0") = __arg6; \
	292	LOAD_REGS_5
0798f1ad	293	#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
dca17080	294
72048093 AZ	295	#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL
	296	#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1
	297
dca17080	298	#endif /* not __ASSEMBLER__ */
40111cb9 MK	299
	300	/* Pointer mangling is not yet supported for M68K. */
	301	#define PTR_MANGLE(var) (void) (var)
	302	#define PTR_DEMANGLE(var) (void) (var)
	303
	304	#if defined NEED_DL_SYSINFO \|\| defined NEED_DL_SYSINFO_DSO
	305	/* M68K needs system-supplied DSO to access TLS helpers
	306	even when statically linked. */
	307	# define NEED_STATIC_SYSINFO_DSO 1
	308	#endif