diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/metag/sysdep-cancel.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/metag/sysdep-cancel.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/metag/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/metag/sysdep-cancel.h new file mode 100644 index 000000000..0be330b73 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/metag/sysdep-cancel.h @@ -0,0 +1,152 @@ +/* Copyright (C) 2003, 2004, 2005, 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <tls.h> +#include <sysdep.h> +#ifndef __ASSEMBLER__ +# include <pthreadP.h> +#endif + +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt + +/* NOTE: We do mark syscalls with unwind annotations, for the benefit of + cancellation; but they're really only accurate at the point of the + syscall. The ARM unwind directives are not rich enough without adding + a custom personality function. */ + +#ifdef __ASSEMBLER__ +#undef ret +#define ret \ + CMP D0Re0, #-4095; \ + MOVLO PC, D1RtP; \ + MOV D1Ar1, D0Re0; \ + B SYSCALL_ERROR; +#endif /* __ASSEMBLER__ */ + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .section ".text"; \ + .type ___##syscall_name##_nocancel,%function; \ + .globl ___##syscall_name##_nocancel; \ + ___##syscall_name##_nocancel: \ + cfi_startproc; \ + DO_CALL (syscall_name, args); \ + MOV PC, D1RtP; \ + cfi_endproc; \ + .size ___##syscall_name##_nocancel,.-___##syscall_name##_nocancel; \ + .globl _##name; \ + .type _##name, @function; \ +name##: \ +_##name##: \ + DOCARGS_##args; \ + SINGLE_THREAD_P; \ + UNDOCARGS_##args; \ + BNE .Lpseudo_cancel; \ + cfi_remember_state; \ + DO_CALL (syscall_name, 0); \ + ret \ + cfi_restore_state; \ + .Lpseudo_cancel: \ + MSETL [A0StP++], D0FrT, D0.5; \ + DOCARGS_##args; /* save syscall args etc. around CENABLE. */ \ + CENABLE; \ + MOV D0FrT, D0Re0; /* put mask in safe place. */ \ + UNDOCARGS_##args; /* restore syscall args. */ \ + DO_CALL(syscall_name, 0); /* do the call. */ \ + MOV D0.5, D0Re0; /* save syscall return value. */ \ + MOV D1Ar1, D0FrT; /* get mask back. */ \ + CDISABLE; \ + MOV D0Re0, D0.5; /* retrieve return value. */ \ + GETL D0.5, D1.5, [--A0StP]; \ + GETL D0FrT, D1RtP, [--A0StP]; + +# define DOCARGS_0 +# define UNDOCARGS_0 + +# define DOCARGS_1 \ + SETL [A0StP++], D1Ar1, D0Ar2 +# define UNDOCARGS_1 \ + GETL D1Ar1, D0Ar2, [--A0StP] + +# define DOCARGS_2 DOCARGS_1 + +# define UNDOCARGS_2 UNDOCARGS_2 + +# define DOCARGS_3 \ + MSETL [A0StP++], D1Ar1, D1Ar3 + +# define UNDOCARGS_3 \ + GETL D1Ar1, D0Ar2, [--A0StP]; \ + GETL D1Ar3, D0Ar4, [--A0StP] + +# define DOCARGS_4 DOCARGS_3 +# define UNDOCARGS_4 UNDOCARGS_3 + +# define DOCARGS_5 \ + MSETL [A0StP++], D1Ar1, D1Ar3, D1Ar5 +# define UNDOCARGS_5 \ + GETL D1Ar1, D0Ar2, [--A0StP]; \ + GETL D1Ar3, D0Ar4, [--A0StP]; \ + GETL D1Ar5, D0Ar6, [--A0StP] + +# define DOCARGS_6 DOCARGS_5 +# define UNDOCARGS_6 UNDOCARGS_5 + +# ifdef IS_IN_libpthread +# define CENABLE CALLR D1RtP, ___pthread_enable_asynccancel@PLT +# define CDISABLE CALLR D1RtP, ___pthread_disable_asynccancel@PLT +# define __local_multiple_threads __pthread_multiple_threads +# elif !defined NOT_IN_libc +# define CENABLE CALLR D1RtP, ___libc_enable_asynccancel@PLT +# define CDISABLE CALLR D1RtP, ___libc_disable_asynccancel@PLT +# define __local_multiple_threads __libc_multiple_threads +# elif defined IS_IN_librt +# define CENABLE CALLR D1RtP, ___librt_enable_asynccancel@PLT +# define CDISABLE CALLR D1RtP, ___librt_disable_asynccancel@PLT +# else +# error Unsupported library +# endif + +#ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + likely(THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0) +#else +# define SINGLE_THREAD_P \ + SETL [A0StP++], D0FrT, D1RtP; \ + CALLR D1RtP, ___metag_load_tp@PLT; \ + SUB D0Re0, D0Re0, #TLS_PRE_TCB_SIZE; \ + GETD D0Re0, [D0Re0 + #MULTIPLE_THREADS_OFFSET]; \ + CMP D0Re0, #0; \ + GETL D0FrT, D1RtP, [--A0StP] +#endif + + +#elif !defined __ASSEMBLER__ + +/* For rtld, et cetera. */ +# define SINGLE_THREAD_P 1 +# define NO_CANCELLATION 1 + +#endif + +#ifndef __ASSEMBLER__ +# define RTLD_SINGLE_THREAD_P \ + likely(THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0) +#endif |