[thirdparty/glibc.git] / nptl / sysdeps / unix / sysv / linux / powerpc / powerpc64 / sysdep-cancel.h

/* Cancellable system call stubs.  Linux/PowerPC64 version.
   Copyright (C) 2003-2013 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.

   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
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif

#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt

# ifdef HAVE_ASM_GLOBAL_DOT_NAME
#  define DASHDASHPFX(str) .__##str
# else
#  define DASHDASHPFX(str) __##str
# endif

#if _CALL_ELF == 2
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16+48)
#define CANCEL_PARM_SAVE (FRAME_MIN_SIZE+16)
#else
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16)
#define CANCEL_PARM_SAVE (CANCEL_FRAMESIZE+FRAME_PARM_SAVE)
#endif

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)				\
  .section ".text";							\
  ENTRY (name)								\
    SINGLE_THREAD_P;							\
    bne- .Lpseudo_cancel;						\
  .type DASHDASHPFX(syscall_name##_nocancel),@function;			\
  .globl DASHDASHPFX(syscall_name##_nocancel);				\
  DASHDASHPFX(syscall_name##_nocancel):					\
    DO_CALL (SYS_ify (syscall_name));					\
    PSEUDO_RET;								\
  .size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel);	\
  .Lpseudo_cancel:							\
    stdu 1,-CANCEL_FRAMESIZE(1);					\
    cfi_adjust_cfa_offset (CANCEL_FRAMESIZE);				\
    mflr 9;								\
    std  9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1);				\
    cfi_offset (lr, FRAME_LR_SAVE);					\
    DOCARGS_##args;	/* save syscall args around CENABLE.  */	\
    CENABLE;								\
    std  3,FRAME_MIN_SIZE(1); /* store CENABLE return value (MASK).  */	\
    UNDOCARGS_##args;	/* restore syscall args.  */			\
    DO_CALL (SYS_ify (syscall_name));					\
    mfcr 0;		/* save CR/R3 around CDISABLE.  */		\
    std  3,FRAME_MIN_SIZE+8(1);						\
    std  0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1);				\
    cfi_offset (cr, FRAME_CR_SAVE);					\
    ld   3,FRAME_MIN_SIZE(1); /* pass MASK to CDISABLE.  */		\
    CDISABLE;								\
    ld   9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1);				\
    ld   0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); /* restore CR/R3. */	\
    ld   3,FRAME_MIN_SIZE+8(1);						\
    mtlr 9;								\
    mtcr 0;								\
    addi 1,1,CANCEL_FRAMESIZE;						\
    cfi_adjust_cfa_offset (-CANCEL_FRAMESIZE);				\
    cfi_restore (lr);							\
    cfi_restore (cr)

# define DOCARGS_0
# define UNDOCARGS_0

# define DOCARGS_1	std 3,CANCEL_PARM_SAVE(1); DOCARGS_0
# define UNDOCARGS_1	ld 3,CANCEL_PARM_SAVE(1); UNDOCARGS_0

# define DOCARGS_2	std 4,CANCEL_PARM_SAVE+8(1); DOCARGS_1
# define UNDOCARGS_2	ld 4,CANCEL_PARM_SAVE+8(1); UNDOCARGS_1

# define DOCARGS_3	std 5,CANCEL_PARM_SAVE+16(1); DOCARGS_2
# define UNDOCARGS_3	ld 5,CANCEL_PARM_SAVE+16(1); UNDOCARGS_2

# define DOCARGS_4	std 6,CANCEL_PARM_SAVE+24(1); DOCARGS_3
# define UNDOCARGS_4	ld 6,CANCEL_PARM_SAVE+24(1); UNDOCARGS_3

# define DOCARGS_5	std 7,CANCEL_PARM_SAVE+32(1); DOCARGS_4
# define UNDOCARGS_5	ld 7,CANCEL_PARM_SAVE+32(1); UNDOCARGS_4

# define DOCARGS_6	std 8,CANCEL_PARM_SAVE+40(1); DOCARGS_5
# define UNDOCARGS_6	ld 8,CANCEL_PARM_SAVE+40(1); UNDOCARGS_5

# ifdef IS_IN_libpthread
#  ifdef SHARED
#   define CENABLE	bl JUMPTARGET(__pthread_enable_asynccancel)
#   define CDISABLE	bl JUMPTARGET(__pthread_disable_asynccancel)
#  else
#   define CENABLE	bl JUMPTARGET(__pthread_enable_asynccancel); nop
#   define CDISABLE	bl JUMPTARGET(__pthread_disable_asynccancel); nop
#  endif
# elif !defined NOT_IN_libc
#  ifdef SHARED
#   define CENABLE	bl JUMPTARGET(__libc_enable_asynccancel)
#   define CDISABLE	bl JUMPTARGET(__libc_disable_asynccancel)
#  else
#   define CENABLE	bl JUMPTARGET(__libc_enable_asynccancel); nop
#   define CDISABLE	bl JUMPTARGET(__libc_disable_asynccancel); nop
#  endif
# elif defined IS_IN_librt
#  ifdef SHARED
#   define CENABLE	bl JUMPTARGET(__librt_enable_asynccancel)
#   define CDISABLE	bl JUMPTARGET(__librt_disable_asynccancel)
#  else
#   define CENABLE	bl JUMPTARGET(__librt_enable_asynccancel); nop
#   define CDISABLE	bl JUMPTARGET(__librt_disable_asynccancel); nop
#  endif
# else
#  error Unsupported library
# endif

# ifndef __ASSEMBLER__
#  define SINGLE_THREAD_P						\
  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				\
				   header.multiple_threads) == 0, 1)
# else
#   define SINGLE_THREAD_P						\
  lwz   10,MULTIPLE_THREADS_OFFSET(13);				\
  cmpwi 10,0
# endif

#elif !defined __ASSEMBLER__

# define SINGLE_THREAD_P (1)
# define NO_CANCELLATION 1

#endif

#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
				   header.multiple_threads) == 0, 1)
#endif
Commit	Line	Data
f3c13160	1	/* Cancellable system call stubs. Linux/PowerPC64 version.
568035b7	2	Copyright (C) 2003-2013 Free Software Foundation, Inc.
f3c13160 RM	3	This file is part of the GNU C Library.
	4	Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	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.
	10
	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
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
f3c13160 RM	19
	20	#include <sysdep.h>
	21	#include <tls.h>
	22	#ifndef __ASSEMBLER__
	23	# include <nptl/pthreadP.h>
	24	#endif
	25
7a114794	26	#if !defined NOT_IN_libc \|\| defined IS_IN_libpthread \|\| defined IS_IN_librt
f3c13160	27
590b40f7 UD	28	# ifdef HAVE_ASM_GLOBAL_DOT_NAME
	29	# define DASHDASHPFX(str) .__##str
	30	# else
	31	# define DASHDASHPFX(str) __##str
	32	# endif
	33
8b8a692c UW	34	#if _CALL_ELF == 2
	35	#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16+48)
	36	#define CANCEL_PARM_SAVE (FRAME_MIN_SIZE+16)
	37	#else
	38	#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16)
	39	#define CANCEL_PARM_SAVE (CANCEL_FRAMESIZE+FRAME_PARM_SAVE)
	40	#endif
	41
f3c13160 RM	42	# undef PSEUDO
	43	# define PSEUDO(name, syscall_name, args) \
	44	.section ".text"; \
	45	ENTRY (name) \
	46	SINGLE_THREAD_P; \
	47	bne- .Lpseudo_cancel; \
590b40f7 UD	48	.type DASHDASHPFX(syscall_name##_nocancel),@function; \
	49	.globl DASHDASHPFX(syscall_name##_nocancel); \
	50	DASHDASHPFX(syscall_name##_nocancel): \
f3c13160 RM	51	DO_CALL (SYS_ify (syscall_name)); \
f3c13160 RM	52	PSEUDO_RET; \
590b40f7	53	.size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel); \
f3c13160	54	.Lpseudo_cancel: \
8b8a692c UW	55	stdu 1,-CANCEL_FRAMESIZE(1); \
8b8a692c UW	56	cfi_adjust_cfa_offset (CANCEL_FRAMESIZE); \
f3c13160	57	mflr 9; \
8b8a692c UW	58	std 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
8b8a692c UW	59	cfi_offset (lr, FRAME_LR_SAVE); \
f3c13160 RM	60	DOCARGS_##args; /* save syscall args around CENABLE. */ \
f3c13160 RM	61	CENABLE; \
8b8a692c	62	std 3,FRAME_MIN_SIZE(1); /* store CENABLE return value (MASK). */ \
f3c13160 RM	63	UNDOCARGS_##args; /* restore syscall args. */ \
	64	DO_CALL (SYS_ify (syscall_name)); \
	65	mfcr 0; /* save CR/R3 around CDISABLE. */ \
8b8a692c UW	66	std 3,FRAME_MIN_SIZE+8(1); \
	67	std 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); \
	68	cfi_offset (cr, FRAME_CR_SAVE); \
	69	ld 3,FRAME_MIN_SIZE(1); /* pass MASK to CDISABLE. */ \
f3c13160	70	CDISABLE; \
8b8a692c UW	71	ld 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
	72	ld 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); /* restore CR/R3. */ \
	73	ld 3,FRAME_MIN_SIZE+8(1); \
f3c13160 RM	74	mtlr 9; \
f3c13160 RM	75	mtcr 0; \
8b8a692c UW	76	addi 1,1,CANCEL_FRAMESIZE; \
8b8a692c UW	77	cfi_adjust_cfa_offset (-CANCEL_FRAMESIZE); \
bebff237 AM	78	cfi_restore (lr); \
bebff237 AM	79	cfi_restore (cr)
f3c13160 RM	80
	81	# define DOCARGS_0
	82	# define UNDOCARGS_0
	83
8b8a692c UW	84	# define DOCARGS_1 std 3,CANCEL_PARM_SAVE(1); DOCARGS_0
8b8a692c UW	85	# define UNDOCARGS_1 ld 3,CANCEL_PARM_SAVE(1); UNDOCARGS_0
f3c13160	86
8b8a692c UW	87	# define DOCARGS_2 std 4,CANCEL_PARM_SAVE+8(1); DOCARGS_1
8b8a692c UW	88	# define UNDOCARGS_2 ld 4,CANCEL_PARM_SAVE+8(1); UNDOCARGS_1
f3c13160	89
8b8a692c UW	90	# define DOCARGS_3 std 5,CANCEL_PARM_SAVE+16(1); DOCARGS_2
8b8a692c UW	91	# define UNDOCARGS_3 ld 5,CANCEL_PARM_SAVE+16(1); UNDOCARGS_2
f3c13160	92
8b8a692c UW	93	# define DOCARGS_4 std 6,CANCEL_PARM_SAVE+24(1); DOCARGS_3
8b8a692c UW	94	# define UNDOCARGS_4 ld 6,CANCEL_PARM_SAVE+24(1); UNDOCARGS_3
f3c13160	95
8b8a692c UW	96	# define DOCARGS_5 std 7,CANCEL_PARM_SAVE+32(1); DOCARGS_4
8b8a692c UW	97	# define UNDOCARGS_5 ld 7,CANCEL_PARM_SAVE+32(1); UNDOCARGS_4
f3c13160	98
8b8a692c UW	99	# define DOCARGS_6 std 8,CANCEL_PARM_SAVE+40(1); DOCARGS_5
8b8a692c UW	100	# define UNDOCARGS_6 ld 8,CANCEL_PARM_SAVE+40(1); UNDOCARGS_5
f3c13160 RM	101
f3c13160 RM	102	# ifdef IS_IN_libpthread
bebff237 AM	103	# ifdef SHARED
	104	# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel)
	105	# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel)
	106	# else
	107	# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel); nop
	108	# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel); nop
	109	# endif
bbde8527	110	# elif !defined NOT_IN_libc
bebff237 AM	111	# ifdef SHARED
	112	# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel)
	113	# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel)
	114	# else
	115	# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel); nop
	116	# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel); nop
	117	# endif
bbde8527	118	# elif defined IS_IN_librt
bebff237 AM	119	# ifdef SHARED
	120	# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel)
	121	# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel)
	122	# else
	123	# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel); nop
	124	# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel); nop
	125	# endif
bbde8527 UD	126	# else
bbde8527 UD	127	# error Unsupported library
f3c13160 RM	128	# endif
	129
	130	# ifndef __ASSEMBLER__
	131	# define SINGLE_THREAD_P \
468777e1 UD	132	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
468777e1 UD	133	header.multiple_threads) == 0, 1)
f3c13160 RM	134	# else
	135	# define SINGLE_THREAD_P \
	136	lwz 10,MULTIPLE_THREADS_OFFSET(13); \
211d90c5	137	cmpwi 10,0
f3c13160 RM	138	# endif
	139
	140	#elif !defined __ASSEMBLER__
	141
6e627806	142	# define SINGLE_THREAD_P (1)
ce6e047f	143	# define NO_CANCELLATION 1
f3c13160 RM	144
f3c13160 RM	145	#endif
6e627806 UD	146
	147	#ifndef __ASSEMBLER__
	148	# define RTLD_SINGLE_THREAD_P \
	149	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
	150	header.multiple_threads) == 0, 1)
	151	#endif