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