diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h new file mode 100644 index 000000000..84acf3843 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h @@ -0,0 +1,132 @@ +/* Cancellable system call stubs. Linux/PowerPC version. + Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 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> +#include <tls.h> +#ifndef __ASSEMBLER__ +# include <nptl/pthreadP.h> +#endif + +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .section ".text"; \ + ENTRY (name) \ + cfi_startproc; \ + SINGLE_THREAD_P; \ + bne- .Lpseudo_cancel; \ + .type __##syscall_name##_nocancel,@function; \ + .globl __##syscall_name##_nocancel; \ + __##syscall_name##_nocancel: \ + DO_CALL (SYS_ify (syscall_name)); \ + PSEUDO_RET; \ + .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ + .Lpseudo_cancel: \ + stwu 1,-48(1); \ + cfi_adjust_cfa_offset (48); \ + mflr 9; \ + stw 9,52(1); \ + cfi_offset (lr, 4); \ + CGOTSETUP; \ + DOCARGS_##args; /* save syscall args around CENABLE. */ \ + CENABLE; \ + stw 3,16(1); /* store CENABLE return value (MASK). */ \ + UNDOCARGS_##args; /* restore syscall args. */ \ + DO_CALL (SYS_ify (syscall_name)); \ + mfcr 0; /* save CR/R3 around CDISABLE. */ \ + stw 3,8(1); \ + stw 0,12(1); \ + lwz 3,16(1); /* pass MASK to CDISABLE. */ \ + CDISABLE; \ + lwz 4,52(1); \ + lwz 0,12(1); /* restore CR/R3. */ \ + lwz 3,8(1); \ + CGOTRESTORE; \ + mtlr 4; \ + mtcr 0; \ + addi 1,1,48; \ + cfi_endproc; + +# define DOCARGS_0 +# define UNDOCARGS_0 + +# define DOCARGS_1 stw 3,20(1); DOCARGS_0 +# define UNDOCARGS_1 lwz 3,20(1); UNDOCARGS_0 + +# define DOCARGS_2 stw 4,24(1); DOCARGS_1 +# define UNDOCARGS_2 lwz 4,24(1); UNDOCARGS_1 + +# define DOCARGS_3 stw 5,28(1); DOCARGS_2 +# define UNDOCARGS_3 lwz 5,28(1); UNDOCARGS_2 + +# define DOCARGS_4 stw 6,32(1); DOCARGS_3 +# define UNDOCARGS_4 lwz 6,32(1); UNDOCARGS_3 + +# define DOCARGS_5 stw 7,36(1); DOCARGS_4 +# define UNDOCARGS_5 lwz 7,36(1); UNDOCARGS_4 + +# define DOCARGS_6 stw 8,40(1); DOCARGS_5 +# define UNDOCARGS_6 lwz 8,40(1); UNDOCARGS_5 + +# define CGOTSETUP +# define CGOTRESTORE + +# ifdef IS_IN_libpthread +# define CENABLE bl __pthread_enable_asynccancel@local +# define CDISABLE bl __pthread_disable_asynccancel@local +# elif !defined NOT_IN_libc +# define CENABLE bl __libc_enable_asynccancel@local +# define CDISABLE bl __libc_disable_asynccancel@local +# elif defined IS_IN_librt +# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel) +# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel) +# if defined HAVE_AS_REL16 && defined PIC +# undef CGOTSETUP +# define CGOTSETUP \ + bcl 20,31,1f; \ + 1: stw 30,44(1); \ + mflr 30; \ + addis 30,30,_GLOBAL_OFFSET_TABLE-1b@ha; \ + addi 30,30,_GLOBAL_OFFSET_TABLE-1b@l +# undef CGOTRESTORE +# define CGOTRESTORE \ + lwz 30,44(1) +# endif +# else +# error Unsupported library +# endif + +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +# else +# define SINGLE_THREAD_P \ + lwz 10,MULTIPLE_THREADS_OFFSET(2); \ + cmpwi 10,0 +# endif + +#elif !defined __ASSEMBLER__ + +# define SINGLE_THREAD_P (1) +# define NO_CANCELLATION 1 + +#endif |