/* Cancellable system call stubs. Linux/PowerPC64 version. Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Franz Sirl , 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 #include #ifndef __ASSEMBLER__ # include #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: \ stdu 1,-128(1); \ cfi_adjust_cfa_offset (128); \ mflr 9; \ std 9,128+16(1); \ cfi_offset (lr, 16); \ DOCARGS_##args; /* save syscall args around CENABLE. */ \ CENABLE; \ std 3,72(1); /* store CENABLE return value (MASK). */ \ UNDOCARGS_##args; /* restore syscall args. */ \ DO_CALL (SYS_ify (syscall_name)); \ mfcr 0; /* save CR/R3 around CDISABLE. */ \ std 3,64(1); \ std 0,8(1); \ ld 3,72(1); /* pass MASK to CDISABLE. */ \ CDISABLE; \ ld 9,128+16(1); \ ld 0,8(1); /* restore CR/R3. */ \ ld 3,64(1); \ mtlr 9; \ mtcr 0; \ addi 1,1,128; \ cfi_endproc; # define DOCARGS_0 # define UNDOCARGS_0 # define DOCARGS_1 std 3,80(1); DOCARGS_0 # define UNDOCARGS_1 ld 3,80(1); UNDOCARGS_0 # define DOCARGS_2 std 4,88(1); DOCARGS_1 # define UNDOCARGS_2 ld 4,88(1); UNDOCARGS_1 # define DOCARGS_3 std 5,96(1); DOCARGS_2 # define UNDOCARGS_3 ld 5,96(1); UNDOCARGS_2 # define DOCARGS_4 std 6,104(1); DOCARGS_3 # define UNDOCARGS_4 ld 6,104(1); UNDOCARGS_3 # define DOCARGS_5 std 7,112(1); DOCARGS_4 # define UNDOCARGS_5 ld 7,112(1); UNDOCARGS_4 # define DOCARGS_6 std 8,120(1); DOCARGS_5 # define UNDOCARGS_6 ld 8,120(1); UNDOCARGS_5 # ifdef IS_IN_libpthread # define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel) # define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel) # elif !defined NOT_IN_libc # define CENABLE bl JUMPTARGET(__libc_enable_asynccancel) # define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel) # elif defined IS_IN_librt # define CENABLE bl JUMPTARGET(__librt_enable_asynccancel) # define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel) # 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(13); \ cmpwi 10,0 # endif #elif !defined __ASSEMBLER__ # define SINGLE_THREAD_P (1) # define NO_CANCELLATION 1 #endif