[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / powerpc / powerpc32 / sysdep.h

/* Copyright (C) 1992-2019 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, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1

#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/powerpc/sysdep.h>
#include <tls.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

#ifndef __ASSEMBLER__

# include <errno.h>

/* Define a macro which expands inline into the wrapper code for a VDSO
   call. This use is for internal calls that do not need to handle errors
   normally. It will never touch errno.
   On powerpc a system call basically clobbers the same registers like a
   function call, with the exception of LR (which is needed for the
   "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
   an error return status).  */
# define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, type, args...)	      \
  ({									      \
    register void *r0  __asm__ ("r0");					      \
    register long int r3  __asm__ ("r3");				      \
    register long int r4  __asm__ ("r4");				      \
    register long int r5  __asm__ ("r5");				      \
    register long int r6  __asm__ ("r6");				      \
    register long int r7  __asm__ ("r7");				      \
    register long int r8  __asm__ ("r8");				      \
    register long int r9  __asm__ ("r9");				      \
    register long int r10 __asm__ ("r10");				      \
    register long int r11 __asm__ ("r11");				      \
    register long int r12 __asm__ ("r12");				      \
    register type rval  __asm__ ("r3");					      \
    LOADARGS_##nr (funcptr, args);					      \
    __asm__ __volatile__						      \
      ("mtctr %0\n\t"							      \
       "bctrl\n\t"							      \
       "mfcr %0"							      \
       : "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5),  "+r" (r6),  "+r" (r7),  \
	 "+r" (r8), "+r" (r9), "+r" (r10), "+r" (r11), "+r" (r12)	      \
       : : "cr0", "ctr", "lr", "memory");				      \
    err = (long int) r0;						      \
    __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3), "r" (r4));	      \
    rval;								      \
  })

#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
  INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, long int, args)

# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...)				\
  ({									\
    INTERNAL_SYSCALL_DECL (sc_err);					\
    long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args);	\
    if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err))			\
      {									\
	__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));		\
	sc_ret = -1L;							\
      }									\
    sc_ret;								\
  })

/* 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.
   On powerpc a system call basically clobbers the same registers like a
   function call, with the exception of LR (which is needed for the
   "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
   an error return status).  */

# undef INTERNAL_SYSCALL_DECL
# define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused))

# undef INTERNAL_SYSCALL
# define INTERNAL_SYSCALL_NCS(name, err, nr, args...)			\
  ({									\
    register long int r0  __asm__ ("r0");				\
    register long int r3  __asm__ ("r3");				\
    register long int r4  __asm__ ("r4");				\
    register long int r5  __asm__ ("r5");				\
    register long int r6  __asm__ ("r6");				\
    register long int r7  __asm__ ("r7");				\
    register long int r8  __asm__ ("r8");				\
    register long int r9  __asm__ ("r9");				\
    register long int r10 __asm__ ("r10");				\
    register long int r11 __asm__ ("r11");				\
    register long int r12 __asm__ ("r12");				\
    LOADARGS_##nr(name, args);						\
    __asm__ __volatile__						\
      ("sc   \n\t"							\
       "mfcr %0"							\
       : "=&r" (r0),							\
	 "=&r" (r3), "=&r" (r4), "=&r" (r5),  "=&r" (r6),  "=&r" (r7),	\
	 "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12)	\
       : ASM_INPUT_##nr							\
       : "cr0", "ctr", "memory");					\
    err = r0;								\
    (int) r3;								\
  })
# 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) \
  ((void) (val), __builtin_expect ((err) & (1 << 28), 0))

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

# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...)  \
  ({									      \
    type sc_ret = ENOSYS;						      \
									      \
    __typeof (__vdso_##name) vdsop = __vdso_##name;			      \
    PTR_DEMANGLE (vdsop);						      \
    if (vdsop != NULL)							      \
      sc_ret = 								      \
        INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, nr, type, ##args);	      \
    else								      \
      err = 1 << 28;							      \
    sc_ret;								      \
  })

/* List of system calls which are supported as vsyscalls.  */
# define HAVE_CLOCK_GETRES_VSYSCALL	1
# define HAVE_CLOCK_GETTIME_VSYSCALL	1
# define HAVE_GETCPU_VSYSCALL		1


# define LOADARGS_0(name, dummy)					      \
	r0 = name
# define LOADARGS_1(name, __arg1) \
	long int arg1 = (long int) (__arg1);	\
  LOADARGS_0(name, 0);					   \
	extern void __illegally_sized_syscall_arg1 (void); \
	if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
	  __illegally_sized_syscall_arg1 (); \
	r3 = arg1
# define LOADARGS_2(name, __arg1, __arg2) \
	long int arg2 = (long int) (__arg2); \
	LOADARGS_1(name, __arg1); \
	extern void __illegally_sized_syscall_arg2 (void); \
	if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 4) \
	  __illegally_sized_syscall_arg2 (); \
	r4 = arg2
# define LOADARGS_3(name, __arg1, __arg2, __arg3) \
	long int arg3 = (long int) (__arg3); \
	LOADARGS_2(name, __arg1, __arg2); \
	extern void __illegally_sized_syscall_arg3 (void); \
	if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 4) \
	  __illegally_sized_syscall_arg3 (); \
	r5 = arg3
# define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
	long int arg4 = (long int) (__arg4); \
	LOADARGS_3(name, __arg1, __arg2, __arg3); \
	extern void __illegally_sized_syscall_arg4 (void); \
	if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 4) \
	  __illegally_sized_syscall_arg4 (); \
	r6 = arg4
# define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
	long int arg5 = (long int) (__arg5); \
	LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
	extern void __illegally_sized_syscall_arg5 (void); \
	if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 4) \
	  __illegally_sized_syscall_arg5 (); \
	r7 = arg5
# define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
	long int arg6 = (long int) (__arg6); \
	LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
	extern void __illegally_sized_syscall_arg6 (void); \
	if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 4) \
	  __illegally_sized_syscall_arg6 (); \
	r8 = arg6

# define ASM_INPUT_0 "0" (r0)
# define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
# define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
# define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
# define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
# define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
# define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)

#endif /* __ASSEMBLER__ */


/* Pointer mangling support.  */
#if IS_IN (rtld)
/* We cannot use the thread descriptor because in ld.so we use setjmp
   earlier than the descriptor is initialized.  */
#else
# ifdef __ASSEMBLER__
#  define PTR_MANGLE(reg, tmpreg) \
	lwz	tmpreg,POINTER_GUARD(r2); \
	xor	reg,tmpreg,reg
#  define PTR_MANGLE2(reg, tmpreg) \
	xor	reg,tmpreg,reg
#  define PTR_MANGLE3(destreg, reg, tmpreg) \
	lwz	tmpreg,POINTER_GUARD(r2); \
	xor	destreg,tmpreg,reg
#  define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
#  define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
#  define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
# else
#  define PTR_MANGLE(var) \
  (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
#  define PTR_DEMANGLE(var)	PTR_MANGLE (var)
# endif
#endif

#endif /* linux/powerpc/powerpc32/sysdep.h */
Commit	Line	Data
04277e02	1	/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
4cca6b86 UD	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
4cca6b86 UD	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
4cca6b86	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6	15	License along with the GNU C Library; if not, see
5a82c748	16	<https://www.gnu.org/licenses/>. */
4cca6b86	17
924102e7 UD	18	#ifndef _LINUX_POWERPC_SYSDEP_H
	19	#define _LINUX_POWERPC_SYSDEP_H 1
	20
fb1cf108	21	#include <sysdeps/unix/sysv/linux/sysdep.h>
be9cd93a	22	#include <sysdeps/unix/powerpc/sysdep.h>
00c2b3b9	23	#include <tls.h>
4cca6b86 UD	24
	25	/* For Linux we can use the system call table in the header file
	26	/usr/include/asm/unistd.h
	27	of the kernel. But these symbols do not follow the SYS_* syntax
	28	so we have to redefine the `SYS_ify' macro here. */
	29	#undef SYS_ify
965a54a4	30	#define SYS_ify(syscall_name) __NR_##syscall_name
4cca6b86	31
735d67f2 RM	32	#ifndef __ASSEMBLER__
	33
	34	# include <errno.h>
	35
8c2e201b UD	36	/* Define a macro which expands inline into the wrapper code for a VDSO
	37	call. This use is for internal calls that do not need to handle errors
	38	normally. It will never touch errno.
	39	On powerpc a system call basically clobbers the same registers like a
	40	function call, with the exception of LR (which is needed for the
	41	"sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
	42	an error return status). */
f534255e	43	# define INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, type, args...) \
8c2e201b UD	44	({ \
	45	register void *r0 __asm__ ("r0"); \
	46	register long int r3 __asm__ ("r3"); \
	47	register long int r4 __asm__ ("r4"); \
	48	register long int r5 __asm__ ("r5"); \
	49	register long int r6 __asm__ ("r6"); \
	50	register long int r7 __asm__ ("r7"); \
	51	register long int r8 __asm__ ("r8"); \
	52	register long int r9 __asm__ ("r9"); \
	53	register long int r10 __asm__ ("r10"); \
	54	register long int r11 __asm__ ("r11"); \
	55	register long int r12 __asm__ ("r12"); \
471a1672	56	register type rval __asm__ ("r3"); \
8c2e201b UD	57	LOADARGS_##nr (funcptr, args); \
	58	__asm__ __volatile__ \
	59	("mtctr %0\n\t" \
	60	"bctrl\n\t" \
	61	"mfcr %0" \
471a1672 AB	62	: "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), \
	63	"+r" (r8), "+r" (r9), "+r" (r10), "+r" (r11), "+r" (r12) \
	64	: : "cr0", "ctr", "lr", "memory"); \
8c2e201b	65	err = (long int) r0; \
471a1672 AB	66	__asm__ __volatile__ ("" : "=r" (rval) : "r" (r3), "r" (r4)); \
471a1672 AB	67	rval; \
8c2e201b UD	68	})
8c2e201b UD	69
f534255e AZ	70	#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
	71	INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, nr, long int, args)
	72
735d67f2	73	# undef INLINE_SYSCALL
704bb2fd RM	74	# define INLINE_SYSCALL(name, nr, args...) \
704bb2fd RM	75	({ \
b398ae3c	76	INTERNAL_SYSCALL_DECL (sc_err); \
c67a469f	77	long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \
b398ae3c	78	if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
704bb2fd	79	{ \
b398ae3c UD	80	__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
b398ae3c UD	81	sc_ret = -1L; \
704bb2fd	82	} \
b398ae3c	83	sc_ret; \
735d67f2 RM	84	})
735d67f2 RM	85
73e9ae88 UD	86	/* Define a macro which expands inline into the wrapper code for a system
73e9ae88 UD	87	call. This use is for internal calls that do not need to handle errors
b398ae3c UD	88	normally. It will never touch errno.
	89	On powerpc a system call basically clobbers the same registers like a
	90	function call, with the exception of LR (which is needed for the
	91	"sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
	92	an error return status). */
73e9ae88	93
6aca81bb	94	# undef INTERNAL_SYSCALL_DECL
20f0018d	95	# define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused))
6aca81bb	96
52f3d213	97	# undef INTERNAL_SYSCALL
2edb61e3	98	# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
73e9ae88	99	({ \
c67a469f UD	100	register long int r0 __asm__ ("r0"); \
	101	register long int r3 __asm__ ("r3"); \
	102	register long int r4 __asm__ ("r4"); \
	103	register long int r5 __asm__ ("r5"); \
	104	register long int r6 __asm__ ("r6"); \
	105	register long int r7 __asm__ ("r7"); \
	106	register long int r8 __asm__ ("r8"); \
	107	register long int r9 __asm__ ("r9"); \
	108	register long int r10 __asm__ ("r10"); \
	109	register long int r11 __asm__ ("r11"); \
	110	register long int r12 __asm__ ("r12"); \
471a1672	111	LOADARGS_##nr(name, args); \
73e9ae88	112	__asm__ __volatile__ \
b398ae3c UD	113	("sc \n\t" \
b398ae3c UD	114	"mfcr %0" \
73e9ae88 UD	115	: "=&r" (r0), \
	116	"=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
	117	"=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
	118	: ASM_INPUT_##nr \
	119	: "cr0", "ctr", "memory"); \
b398ae3c	120	err = r0; \
73e9ae88 UD	121	(int) r3; \
73e9ae88 UD	122	})
2edb61e3 UD	123	# define INTERNAL_SYSCALL(name, err, nr, args...) \
2edb61e3 UD	124	INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
6aca81bb	125
52f3d213	126	# undef INTERNAL_SYSCALL_ERROR_P
6aca81bb	127	# define INTERNAL_SYSCALL_ERROR_P(val, err) \
a2274a08	128	((void) (val), __builtin_expect ((err) & (1 << 28), 0))
6aca81bb	129
52f3d213	130	# undef INTERNAL_SYSCALL_ERRNO
b398ae3c	131	# define INTERNAL_SYSCALL_ERRNO(val, err) (val)
73e9ae88	132
f534255e AZ	133	# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
	134	({ \
	135	type sc_ret = ENOSYS; \
	136	\
	137	__typeof (__vdso_##name) vdsop = __vdso_##name; \
	138	PTR_DEMANGLE (vdsop); \
	139	if (vdsop != NULL) \
	140	sc_ret = \
	141	INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, nr, type, ##args); \
	142	else \
	143	err = 1 << 28; \
	144	sc_ret; \
	145	})
	146
	147	/* List of system calls which are supported as vsyscalls. */
	148	# define HAVE_CLOCK_GETRES_VSYSCALL 1
	149	# define HAVE_CLOCK_GETTIME_VSYSCALL 1
dd26c444	150	# define HAVE_GETCPU_VSYSCALL 1
f534255e AZ	151
f534255e AZ	152
8c2e201b	153	# define LOADARGS_0(name, dummy) \
2edb61e3	154	r0 = name
c67a469f UD	155	# define LOADARGS_1(name, __arg1) \
c67a469f UD	156	long int arg1 = (long int) (__arg1); \
8c2e201b	157	LOADARGS_0(name, 0); \
2edb61e3	158	extern void __illegally_sized_syscall_arg1 (void); \
c67a469f	159	if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
2edb61e3	160	__illegally_sized_syscall_arg1 (); \
c67a469f UD	161	r3 = arg1
	162	# define LOADARGS_2(name, __arg1, __arg2) \
	163	long int arg2 = (long int) (__arg2); \
	164	LOADARGS_1(name, __arg1); \
2edb61e3	165	extern void __illegally_sized_syscall_arg2 (void); \
c67a469f	166	if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 4) \
2edb61e3	167	__illegally_sized_syscall_arg2 (); \
c67a469f UD	168	r4 = arg2
	169	# define LOADARGS_3(name, __arg1, __arg2, __arg3) \
	170	long int arg3 = (long int) (__arg3); \
	171	LOADARGS_2(name, __arg1, __arg2); \
2edb61e3	172	extern void __illegally_sized_syscall_arg3 (void); \
c67a469f	173	if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 4) \
2edb61e3	174	__illegally_sized_syscall_arg3 (); \
c67a469f UD	175	r5 = arg3
	176	# define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
	177	long int arg4 = (long int) (__arg4); \
	178	LOADARGS_3(name, __arg1, __arg2, __arg3); \
2edb61e3	179	extern void __illegally_sized_syscall_arg4 (void); \
c67a469f	180	if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 4) \
2edb61e3	181	__illegally_sized_syscall_arg4 (); \
c67a469f UD	182	r6 = arg4
	183	# define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
	184	long int arg5 = (long int) (__arg5); \
	185	LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
2edb61e3	186	extern void __illegally_sized_syscall_arg5 (void); \
c67a469f	187	if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 4) \
2edb61e3	188	__illegally_sized_syscall_arg5 (); \
c67a469f UD	189	r7 = arg5
	190	# define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
	191	long int arg6 = (long int) (__arg6); \
	192	LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
2edb61e3	193	extern void __illegally_sized_syscall_arg6 (void); \
c67a469f	194	if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 4) \
2edb61e3	195	__illegally_sized_syscall_arg6 (); \
c67a469f	196	r8 = arg6
735d67f2	197
704bb2fd RM	198	# define ASM_INPUT_0 "0" (r0)
	199	# define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
	200	# define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
	201	# define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
	202	# define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
	203	# define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
	204	# define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
735d67f2 RM	205
	206	#endif /* __ASSEMBLER__ */
	207
	208
00c2b3b9	209	/* Pointer mangling support. */
a3848485	210	#if IS_IN (rtld)
00c2b3b9 UD	211	/* We cannot use the thread descriptor because in ld.so we use setjmp
	212	earlier than the descriptor is initialized. */
	213	#else
	214	# ifdef __ASSEMBLER__
	215	# define PTR_MANGLE(reg, tmpreg) \
	216	lwz tmpreg,POINTER_GUARD(r2); \
	217	xor reg,tmpreg,reg
5ad77144	218	# define PTR_MANGLE2(reg, tmpreg) \
4e54d7e4	219	xor reg,tmpreg,reg
4a132246 UD	220	# define PTR_MANGLE3(destreg, reg, tmpreg) \
	221	lwz tmpreg,POINTER_GUARD(r2); \
	222	xor destreg,tmpreg,reg
5ad77144 UD	223	# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
5ad77144 UD	224	# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
4a132246	225	# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
00c2b3b9 UD	226	# else
00c2b3b9 UD	227	# define PTR_MANGLE(var) \
db169ed5	228	(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
00c2b3b9 UD	229	# define PTR_DEMANGLE(var) PTR_MANGLE (var)
	230	# endif
	231	#endif
	232
b398ae3c	233	#endif /* linux/powerpc/powerpc32/sysdep.h */