--- /dev/null
+/* 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 */
projects / platform / upstream / linaro-glibc.git / commitdiff