| /* Cancellable system call stubs. Linux/PowerPC version. |
| Copyright (C) 2003, 2004, 2005, 2006, 2007 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., 51 Franklin Street, Fifth Floor, Boston MA |
| 02110-1301 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) \ |
| 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); \ |
| 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); \ |
| mtlr 4; \ |
| mtcr 0; \ |
| addi 1,1,48; |
| |
| # 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 |
| |
| # 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 __librt_enable_asynccancel@local |
| # define CDISABLE bl __librt_disable_asynccancel@local |
| # 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 |
| |
| #ifndef __ASSEMBLER__ |
| # define RTLD_SINGLE_THREAD_P \ |
| __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ |
| header.multiple_threads) == 0, 1) |
| #endif |