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- /* cancellable system calls for Linux/HPPA.
- Copyright (C) 2003 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Carlos O'Donell <carlos@baldric.uwo.ca>, 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #include <sysdep.h>
- #ifndef __ASSEMBLER__
- # include <linuxthreads/internals.h>
- #endif
- #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
- # ifndef NO_ERROR
- # define NO_ERROR -0x1000
- # endif
- # undef PSEUDO
- # define PSEUDO(name, syscall_name, args) \
- ENTRY (name) \
- SINGLE_THREAD_P ASM_LINE_SEP \
- cmpib,<> 0,%ret0,Lpseudo_cancel ASM_LINE_SEP \
- nop ASM_LINE_SEP \
- DO_CALL(syscall_name, args) ASM_LINE_SEP \
- /* DONE! */ ASM_LINE_SEP \
- bv 0(2) ASM_LINE_SEP \
- nop ASM_LINE_SEP \
- Lpseudo_cancel: ASM_LINE_SEP \
- /* store return ptr */ ASM_LINE_SEP \
- stw %rp, -20(%sr0,%sp) ASM_LINE_SEP \
- /* save syscall args */ ASM_LINE_SEP \
- PUSHARGS_##args /* MACRO */ ASM_LINE_SEP \
- STW_PIC ASM_LINE_SEP \
- CENABLE /* FUNC CALL */ ASM_LINE_SEP \
- ldo 64(%sp), %sp ASM_LINE_SEP \
- ldo -64(%sp), %sp ASM_LINE_SEP \
- LDW_PIC ASM_LINE_SEP \
- /* restore syscall args */ ASM_LINE_SEP \
- POPARGS_##args ASM_LINE_SEP \
- /* save r4 in arg0 stack slot */ ASM_LINE_SEP \
- stw %r4, -36(%sr0,%sp) ASM_LINE_SEP \
- /* save mask from cenable */ ASM_LINE_SEP \
- copy %ret0, %r4 ASM_LINE_SEP \
- ble 0x100(%sr2,%r0) ASM_LINE_SEP \
- ldi SYS_ify (syscall_name), %r20 ASM_LINE_SEP \
- LDW_PIC ASM_LINE_SEP \
- /* pass mask as arg0 to cdisable */ ASM_LINE_SEP \
- copy %r4, %r26 ASM_LINE_SEP \
- copy %ret0, %r4 ASM_LINE_SEP \
- CDISABLE ASM_LINE_SEP \
- ldo 64(%sp), %sp ASM_LINE_SEP \
- ldo -64(%sp), %sp ASM_LINE_SEP \
- LDW_PIC ASM_LINE_SEP \
- /* compare error */ ASM_LINE_SEP \
- ldi NO_ERROR,%r1 ASM_LINE_SEP \
- /* branch if no error */ ASM_LINE_SEP \
- cmpb,>>=,n %r1,%r4,Lpre_end ASM_LINE_SEP \
- nop ASM_LINE_SEP \
- SYSCALL_ERROR_HANDLER ASM_LINE_SEP \
- ldo 64(%sp), %sp ASM_LINE_SEP \
- ldo -64(%sp), %sp ASM_LINE_SEP \
- /* No need to LDW_PIC */ ASM_LINE_SEP \
- /* make syscall res value positive */ ASM_LINE_SEP \
- sub %r0, %r4, %r4 ASM_LINE_SEP \
- /* store into errno location */ ASM_LINE_SEP \
- stw %r4, 0(%sr0,%ret0) ASM_LINE_SEP \
- /* return -1 */ ASM_LINE_SEP \
- ldo -1(%r0), %ret0 ASM_LINE_SEP \
- Lpre_end: ASM_LINE_SEP \
- ldw -20(%sr0,%sp), %rp ASM_LINE_SEP \
- /* No need to LDW_PIC */ ASM_LINE_SEP \
- ldw -36(%sr0,%sp), %r4 ASM_LINE_SEP
- /* Save arguments into our frame */
- # define PUSHARGS_0 /* nothing to do */
- # define PUSHARGS_1 PUSHARGS_0 stw %r26, -36(%sr0,%sp) ASM_LINE_SEP
- # define PUSHARGS_2 PUSHARGS_1 stw %r25, -40(%sr0,%sp) ASM_LINE_SEP
- # define PUSHARGS_3 PUSHARGS_2 stw %r24, -44(%sr0,%sp) ASM_LINE_SEP
- # define PUSHARGS_4 PUSHARGS_3 stw %r23, -48(%sr0,%sp) ASM_LINE_SEP
- # define PUSHARGS_5 PUSHARGS_4 /* Args are on the stack... */
- # define PUSHARGS_6 PUSHARGS_5
- /* Bring them back from the stack */
- # define POPARGS_0 /* nothing to do */
- # define POPARGS_1 POPARGS_0 ldw -36(%sr0,%sp), %r26 ASM_LINE_SEP
- # define POPARGS_2 POPARGS_1 ldw -40(%sr0,%sp), %r25 ASM_LINE_SEP
- # define POPARGS_3 POPARGS_2 ldw -44(%sr0,%sp), %r24 ASM_LINE_SEP
- # define POPARGS_4 POPARGS_3 ldw -48(%sr0,%sp), %r23 ASM_LINE_SEP
- # define POPARGS_5 POPARGS_4 ldw -52(%sr0,%sp), %r22 ASM_LINE_SEP
- # define POPARGS_6 POPARGS_5 ldw -54(%sr0,%sp), %r21 ASM_LINE_SEP
- # ifdef IS_IN_libpthread
- # ifdef __PIC__
- # define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \
- bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \
- bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP
- # else
- # define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \
- bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \
- bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP
- # endif
- # elif !defined NOT_IN_libc
- # ifdef __PIC__
- # define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \
- bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __libc_disable_asynccancel,code ASM_LINE_SEP \
- bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP
- # else
- # define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \
- bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __libc_disable_asynccancel,code ASM_LINE_SEP \
- bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP
- # endif
- # else
- # ifdef __PIC__
- # define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \
- bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \
- bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP
- # else
- # define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \
- bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP
- # define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \
- bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP
- # endif
- # endif
- /* p_header.multiple_threads is +12 from the pthread_descr struct start,
- We could have called __get_cr27() but we really want less overhead */
- # define MULTIPLE_THREADS_OFFSET 0xC
- /* cr27 has been initialized to 0x0 by kernel */
- # define NO_THREAD_CR27 0x0
- # ifdef IS_IN_libpthread
- # define __local_multiple_threads __pthread_multiple_threads
- # elif !defined NOT_IN_libc
- # define __local_multiple_threads __libc_multiple_threads
- # else
- # define __local_multiple_threads __librt_multiple_threads
- # endif
- # ifndef __ASSEMBLER__
- extern int __local_multiple_threads attribute_hidden;
- # define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
- # else
- /* This ALT version requires newer kernel support */
- # define SINGLE_THREAD_P_MFCTL \
- mfctl %cr27, %ret0 ASM_LINE_SEP \
- cmpib,= NO_THREAD_CR27,%ret0,Lstp ASM_LINE_SEP \
- nop ASM_LINE_SEP \
- ldw MULTIPLE_THREADS_OFFSET(%sr0,%ret0),%ret0 ASM_LINE_SEP \
- Lstp: ASM_LINE_SEP
- # ifdef __PIC__
- /* Slower version uses GOT to get value of __local_multiple_threads */
- # define SINGLE_THREAD_P \
- addil LT%__local_multiple_threads, %r19 ASM_LINE_SEP \
- ldw RT%__local_multiple_threads(%sr0,%r1), %ret0 ASM_LINE_SEP \
- ldw 0(%sr0,%ret0), %ret0 ASM_LINE_SEP
- # else
- /* Slow non-pic version using DP */
- # define SINGLE_THREAD_P \
- addil LR%__local_multiple_threads-$global$,%r27 ASM_LINE_SEP \
- ldw RR%__local_multiple_threads-$global$(%sr0,%r1),%ret0 ASM_LINE_SEP
- # endif
- # endif
- #elif !defined __ASSEMBLER__
- /* This code should never be used but we define it anyhow. */
- # define SINGLE_THREAD_P (1)
- #endif
- /* !defined NOT_IN_libc || defined IS_IN_libpthread */
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