[thirdparty/glibc.git] / ports / sysdeps / unix / sysv / linux / m68k / nptl / sysdep-cancel.h

/* Copyright (C) 2010-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.

   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

# undef PSEUDO
# define PSEUDO(name, syscall_name, args)				      \
  .text;								      \
  ENTRY (name)								      \
    SINGLE_THREAD_P;							      \
    jne .Lpseudo_cancel;						      \
  .type __##syscall_name##_nocancel,@function;			              \
  .globl __##syscall_name##_nocancel;				 	      \
  __##syscall_name##_nocancel:					              \
    DO_CALL (syscall_name, args);					      \
    cmp.l &-4095, %d0;							      \
    jcc SYSCALL_ERROR_LABEL;						      \
    rts;								      \
  .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	      \
  .Lpseudo_cancel:							      \
    CENABLE;								      \
    DOCARGS_##args							      \
    move.l %d0, -(%sp); /* Save result of CENABLE.  */  		      \
    cfi_adjust_cfa_offset (4); \
    move.l &SYS_ify (syscall_name), %d0;				      \
    trap &0;								      \
    move.l %d0, %d2;							      \
    CDISABLE;								      \
    addq.l &4, %sp; /* Remove result of CENABLE from the stack.  */           \
    cfi_adjust_cfa_offset (-4); \
    move.l %d2, %d0;							      \
    UNDOCARGS_##args							      \
    cmp.l &-4095, %d0;							      \
    jcc SYSCALL_ERROR_LABEL

/* Note: we use D2 to save syscall's return value as D0 will be clobbered in
   CDISABLE.  */
# define DOCARGS_0	move.l %d2, -(%sp);		\
  cfi_adjust_cfa_offset (4); cfi_rel_offset (%d2, 0);
# define UNDOCARGS_0	move.l (%sp)+, %d2;	\
  cfi_adjust_cfa_offset (-4); cfi_restore (%d2);

# define DOCARGS_1	_DOCARGS_1 (4); DOCARGS_0
# define _DOCARGS_1(n)	move.l n(%sp), %d1;
# define UNDOCARGS_1	UNDOCARGS_0

# define DOCARGS_2	_DOCARGS_2 (8)
# define _DOCARGS_2(n)	DOCARGS_0 move.l n+4(%sp), %d2; _DOCARGS_1 (n)
# define UNDOCARGS_2	UNDOCARGS_0

# define DOCARGS_3	_DOCARGS_3 (12)
# define _DOCARGS_3(n)	move.l %d3, -(%sp);				\
  cfi_adjust_cfa_offset (4); cfi_rel_offset (%d3, 0);			\
  move.l n+4(%sp), %d3; _DOCARGS_2 (n)
# define UNDOCARGS_3	UNDOCARGS_2 move.l (%sp)+, %d3;		\
  cfi_adjust_cfa_offset (-4); cfi_restore (%d3);

# define DOCARGS_4	_DOCARGS_4 (16)
# define _DOCARGS_4(n)	move.l %d4, -(%sp);			\
  cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0);		\
  move.l n+4(%sp), %d4; _DOCARGS_3 (n)
# define UNDOCARGS_4	UNDOCARGS_3 move.l (%sp)+, %d4;	\
  cfi_adjust_cfa_offset (-4); cfi_restore (%d4);

# define DOCARGS_5	_DOCARGS_5 (20)
# define _DOCARGS_5(n)	move.l %d5, -(%sp);			\
  cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0);		\
  move.l n+4(%sp), %d5; _DOCARGS_4 (n)
# define UNDOCARGS_5	UNDOCARGS_4 move.l (%sp)+, %d5; \
  cfi_adjust_cfa_offset (-4); cfi_restore (%d5);

# define DOCARGS_6	_DOCARGS_6 (24)
# define _DOCARGS_6(n)	move.l n(%sp), %a0; _DOCARGS_5 (n-4)
# define UNDOCARGS_6	UNDOCARGS_5

# ifdef PIC
#  define PSEUDO_JMP(sym) jbsr sym ## @PLTPC
# else
#  define PSEUDO_JMP(sym) jbsr sym
# endif

# ifdef IS_IN_libpthread
#  define CENABLE	PSEUDO_JMP (__pthread_enable_asynccancel)
#  define CDISABLE	PSEUDO_JMP (__pthread_disable_asynccancel)
# elif !defined NOT_IN_libc
#  define CENABLE	PSEUDO_JMP (__libc_enable_asynccancel)
#  define CDISABLE	PSEUDO_JMP (__libc_disable_asynccancel)
# elif defined IS_IN_librt
#  define CENABLE	PSEUDO_JMP (__librt_enable_asynccancel)
#  define CDISABLE	PSEUDO_JMP (__librt_disable_asynccancel)
# 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			\
  PSEUDO_JMP (__m68k_read_tp);		        \
  tst.l MULTIPLE_THREADS_OFFSET(%a0)
# 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
d4697bc9	1	/* Copyright (C) 2010-2014 Free Software Foundation, Inc.
40111cb9 MK	2	This file is part of the GNU C Library.
	3	Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
ab84e3ff PE	16	License along with the GNU C Library. If not, see
ab84e3ff PE	17	<http://www.gnu.org/licenses/>. */
40111cb9 MK	18
	19	#include <sysdep.h>
	20	#include <tls.h>
	21	#ifndef __ASSEMBLER__
	22	# include <nptl/pthreadP.h>
	23	#endif
	24
	25	#if !defined NOT_IN_libc \|\| defined IS_IN_libpthread \|\| defined IS_IN_librt
	26
	27	# undef PSEUDO
	28	# define PSEUDO(name, syscall_name, args) \
	29	.text; \
	30	ENTRY (name) \
	31	SINGLE_THREAD_P; \
	32	jne .Lpseudo_cancel; \
	33	.type __##syscall_name##_nocancel,@function; \
	34	.globl __##syscall_name##_nocancel; \
	35	__##syscall_name##_nocancel: \
	36	DO_CALL (syscall_name, args); \
	37	cmp.l &-4095, %d0; \
	38	jcc SYSCALL_ERROR_LABEL; \
	39	rts; \
	40	.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
	41	.Lpseudo_cancel: \
40111cb9 MK	42	CENABLE; \
	43	DOCARGS_##args \
	44	move.l %d0, -(%sp); /* Save result of CENABLE. */ \
	45	cfi_adjust_cfa_offset (4); \
	46	move.l &SYS_ify (syscall_name), %d0; \
	47	trap &0; \
	48	move.l %d0, %d2; \
	49	CDISABLE; \
	50	addq.l &4, %sp; /* Remove result of CENABLE from the stack. */ \
	51	cfi_adjust_cfa_offset (-4); \
	52	move.l %d2, %d0; \
	53	UNDOCARGS_##args \
	54	cmp.l &-4095, %d0; \
50e73d13	55	jcc SYSCALL_ERROR_LABEL
40111cb9 MK	56
	57	/* Note: we use D2 to save syscall's return value as D0 will be clobbered in
	58	CDISABLE. */
	59	# define DOCARGS_0 move.l %d2, -(%sp); \
	60	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d2, 0);
	61	# define UNDOCARGS_0 move.l (%sp)+, %d2; \
	62	cfi_adjust_cfa_offset (-4); cfi_restore (%d2);
	63
	64	# define DOCARGS_1 _DOCARGS_1 (4); DOCARGS_0
	65	# define _DOCARGS_1(n) move.l n(%sp), %d1;
	66	# define UNDOCARGS_1 UNDOCARGS_0
	67
	68	# define DOCARGS_2 _DOCARGS_2 (8)
	69	# define _DOCARGS_2(n) DOCARGS_0 move.l n+4(%sp), %d2; _DOCARGS_1 (n)
	70	# define UNDOCARGS_2 UNDOCARGS_0
	71
40111cb9 MK	72	# define DOCARGS_3 _DOCARGS_3 (12)
	73	# define _DOCARGS_3(n) move.l %d3, -(%sp); \
	74	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d3, 0); \
	75	move.l n+4(%sp), %d3; _DOCARGS_2 (n)
	76	# define UNDOCARGS_3 UNDOCARGS_2 move.l (%sp)+, %d3; \
	77	cfi_adjust_cfa_offset (-4); cfi_restore (%d3);
	78
	79	# define DOCARGS_4 _DOCARGS_4 (16)
	80	# define _DOCARGS_4(n) move.l %d4, -(%sp); \
	81	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \
	82	move.l n+4(%sp), %d4; _DOCARGS_3 (n)
	83	# define UNDOCARGS_4 UNDOCARGS_3 move.l (%sp)+, %d4; \
	84	cfi_adjust_cfa_offset (-4); cfi_restore (%d4);
	85
	86	# define DOCARGS_5 _DOCARGS_5 (20)
67f2b51c AS	87	# define _DOCARGS_5(n) move.l %d5, -(%sp); \
	88	cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \
	89	move.l n+4(%sp), %d5; _DOCARGS_4 (n)
	90	# define UNDOCARGS_5 UNDOCARGS_4 move.l (%sp)+, %d5; \
	91	cfi_adjust_cfa_offset (-4); cfi_restore (%d5);
40111cb9 MK	92
	93	# define DOCARGS_6 _DOCARGS_6 (24)
	94	# define _DOCARGS_6(n) move.l n(%sp), %a0; _DOCARGS_5 (n-4)
	95	# define UNDOCARGS_6 UNDOCARGS_5
	96
	97	# ifdef PIC
	98	# define PSEUDO_JMP(sym) jbsr sym ## @PLTPC
	99	# else
	100	# define PSEUDO_JMP(sym) jbsr sym
	101	# endif
	102
	103	# ifdef IS_IN_libpthread
	104	# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
	105	# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
	106	# elif !defined NOT_IN_libc
	107	# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
	108	# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
	109	# elif defined IS_IN_librt
	110	# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
	111	# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
	112	# else
	113	# error Unsupported library
	114	# endif
	115
	116	# ifndef __ASSEMBLER__
	117	# define SINGLE_THREAD_P \
	118	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
	119	header.multiple_threads) == 0, 1)
	120	# else
	121	# define SINGLE_THREAD_P \
	122	PSEUDO_JMP (__m68k_read_tp); \
	123	tst.l MULTIPLE_THREADS_OFFSET(%a0)
	124	# endif
	125
	126	#elif !defined __ASSEMBLER__
	127
	128	# define SINGLE_THREAD_P (1)
	129	# define NO_CANCELLATION (1)
	130
	131	#endif
	132
	133	#ifndef __ASSEMBLER__
	134	# define RTLD_SINGLE_THREAD_P \
	135	__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
	136	header.multiple_threads) == 0, \
	137	1)
	138	#endif