2003-03-17 11:22:52 +00:00
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/* Cancellable system call stubs. Linux/PowerPC version.
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2016-01-04 16:05:18 +00:00
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Copyright (C) 2003-2016 Free Software Foundation, Inc.
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2003-03-17 11:22:52 +00:00
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This file is part of the GNU C Library.
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Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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2003-03-17 11:22:52 +00:00
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#include <sysdep.h>
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#include <tls.h>
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#ifndef __ASSEMBLER__
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# include <nptl/pthreadP.h>
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#endif
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2014-11-24 09:33:45 +00:00
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#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
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2003-03-17 11:22:52 +00:00
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# undef PSEUDO
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# define PSEUDO(name, syscall_name, args) \
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.section ".text"; \
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ENTRY (name) \
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SINGLE_THREAD_P; \
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bne- .Lpseudo_cancel; \
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2003-09-03 02:53:32 +00:00
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.type __##syscall_name##_nocancel,@function; \
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.globl __##syscall_name##_nocancel; \
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__##syscall_name##_nocancel: \
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2003-03-17 11:22:52 +00:00
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DO_CALL (SYS_ify (syscall_name)); \
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PSEUDO_RET; \
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2003-09-03 02:53:32 +00:00
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.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
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2003-03-17 11:22:52 +00:00
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.Lpseudo_cancel: \
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stwu 1,-48(1); \
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2003-07-11 22:50:16 +00:00
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cfi_adjust_cfa_offset (48); \
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2003-03-17 11:22:52 +00:00
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mflr 9; \
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stw 9,52(1); \
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2003-07-11 22:50:16 +00:00
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cfi_offset (lr, 4); \
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2003-03-17 11:22:52 +00:00
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DOCARGS_##args; /* save syscall args around CENABLE. */ \
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CENABLE; \
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stw 3,16(1); /* store CENABLE return value (MASK). */ \
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UNDOCARGS_##args; /* restore syscall args. */ \
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DO_CALL (SYS_ify (syscall_name)); \
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mfcr 0; /* save CR/R3 around CDISABLE. */ \
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stw 3,8(1); \
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stw 0,12(1); \
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lwz 3,16(1); /* pass MASK to CDISABLE. */ \
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CDISABLE; \
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lwz 4,52(1); \
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lwz 0,12(1); /* restore CR/R3. */ \
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lwz 3,8(1); \
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mtlr 4; \
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mtcr 0; \
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2006-01-04 20:05:05 +00:00
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addi 1,1,48;
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2003-03-17 11:22:52 +00:00
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# define DOCARGS_0
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# define UNDOCARGS_0
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# define DOCARGS_1 stw 3,20(1); DOCARGS_0
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# define UNDOCARGS_1 lwz 3,20(1); UNDOCARGS_0
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# define DOCARGS_2 stw 4,24(1); DOCARGS_1
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# define UNDOCARGS_2 lwz 4,24(1); UNDOCARGS_1
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# define DOCARGS_3 stw 5,28(1); DOCARGS_2
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# define UNDOCARGS_3 lwz 5,28(1); UNDOCARGS_2
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# define DOCARGS_4 stw 6,32(1); DOCARGS_3
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# define UNDOCARGS_4 lwz 6,32(1); UNDOCARGS_3
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# define DOCARGS_5 stw 7,36(1); DOCARGS_4
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# define UNDOCARGS_5 lwz 7,36(1); UNDOCARGS_4
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# define DOCARGS_6 stw 8,40(1); DOCARGS_5
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# define UNDOCARGS_6 lwz 8,40(1); UNDOCARGS_5
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2014-11-20 08:52:40 +00:00
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# if IS_IN (libpthread)
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2005-05-21 19:29:13 +00:00
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# define CENABLE bl __pthread_enable_asynccancel@local
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# define CDISABLE bl __pthread_disable_asynccancel@local
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2014-11-24 09:33:45 +00:00
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# elif IS_IN (libc)
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2005-05-21 19:29:13 +00:00
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# define CENABLE bl __libc_enable_asynccancel@local
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# define CDISABLE bl __libc_disable_asynccancel@local
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2014-11-20 07:56:25 +00:00
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# elif IS_IN (librt)
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2007-08-05 13:43:20 +00:00
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# define CENABLE bl __librt_enable_asynccancel@local
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# define CDISABLE bl __librt_disable_asynccancel@local
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2003-06-17 08:58:31 +00:00
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# else
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# error Unsupported library
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2003-03-17 11:22:52 +00:00
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# endif
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# ifndef __ASSEMBLER__
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# define SINGLE_THREAD_P \
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2003-04-25 22:28:13 +00:00
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) == 0, 1)
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2003-03-17 11:22:52 +00:00
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# else
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# define SINGLE_THREAD_P \
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lwz 10,MULTIPLE_THREADS_OFFSET(2); \
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cmpwi 10,0
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# endif
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#elif !defined __ASSEMBLER__
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2006-10-29 21:50:49 +00:00
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# define SINGLE_THREAD_P (1)
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2004-07-06 04:26:42 +00:00
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# define NO_CANCELLATION 1
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2003-03-17 11:22:52 +00:00
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#endif
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2006-10-29 21:50:49 +00:00
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#ifndef __ASSEMBLER__
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# define RTLD_SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) == 0, 1)
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#endif
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