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- /* 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, see
- <http://www.gnu.org/licenses/>. */
- #include <sysdep.h>
- #include <tls.h>
- #ifndef __ASSEMBLER__
- # include <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
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