diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/or1k/sysdep-cancel.h')
-rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/or1k/sysdep-cancel.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/sysdep-cancel.h new file mode 100644 index 000000000..286fa0cce --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/sysdep-cancel.h @@ -0,0 +1,116 @@ +/* Copyright (C) 2014 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, 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) \ +ENTRY(__##syscall_name##_nocancel); \ +L(pseudo_nocancel): \ + DO_CALL(syscall_name); \ + l.j L(pseudo_finish); \ + l.nop; \ +END(__##syscall_name##_nocancel); \ +ENTRY(name); \ + SINGLE_THREAD_P(r13); \ + l.sfeq r13,r0; \ + l.bnf L(pseudo_nocancel); \ + l.nop; \ + /* Reserve the same amount of stack space, effectivly disregarding \ + * how many args we're supposed to push. This makes the code easier. */ \ + l.addi r1,r1,-28; \ + cfi_adjust_cfa_offset(28); \ + PUSHARGS_##args; /* CENABLE is a function call, save args for syscall. */ \ + CENABLE; \ + l.sw 24(r1),r11; \ + POPARGS_##args; \ + DO_CALL(syscall_name); \ + l.lwz r3,24(r1); /* pass return value from CENABLE to CDISABLE. */ \ + l.sw 24(r1),r11; /* save syscall return value for after CDISABLE. */ \ + CDISABLE; \ + l.lwz r11,24(r1); /* restore syscall return value. */ \ + cfi_adjust_cfa_offset(-28); \ + l.addi r1,r1,28; \ +L(pseudo_finish): \ + /* if -4096 < ret < 0 holds, it's an error */ \ + l.sfgeui r11,0xf001; \ + l.bf L(pseudo_end); \ + l.nop + +# undef PSEUDO_END +# define PSEUDO_END(name) \ +L(pseudo_end): \ + l.j SYSCALL_ERROR_NAME; \ + l.ori r3,r11,0; \ + END(name) + +# define PUSHARGS_0 /* nothing to do */ +# define PUSHARGS_1 PUSHARGS_0 l.sw 0(r1),r3; +# define PUSHARGS_2 PUSHARGS_1 l.sw 4(r1),r4; +# define PUSHARGS_3 PUSHARGS_2 l.sw 8(r1),r5; +# define PUSHARGS_4 PUSHARGS_3 l.sw 12(r1),r6; +# define PUSHARGS_5 PUSHARGS_4 l.sw 16(r1),r7; +# define PUSHARGS_6 PUSHARGS_5 l.sw 20(r1),r8; + +# define POPARGS_0 /* nothing to do */ +# define POPARGS_1 POPARGS_0 l.lwz r3,0(r1); +# define POPARGS_2 POPARGS_1 l.lwz r4,4(r1); +# define POPARGS_3 POPARGS_2 l.lwz r5,8(r1); +# define POPARGS_4 POPARGS_3 l.lwz r6,12(r1); +# define POPARGS_5 POPARGS_4 l.lwz r7,16(r1); +# define POPARGS_6 POPARGS_5 l.lwz r8,20(r1); + +# define PSEUDO_JMP(sym) l.jal sym; l.nop; + +# ifdef IS_IN_libpthread +# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel) +# elif defined IS_IN_librt +# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel) +# else +# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel) +# endif + +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +# else +/* It's not super nice to have "r10" hardcoded here */ +# define SINGLE_THREAD_P(reg) l.lwz reg, MULTIPLE_THREADS_OFFSET(r10) +#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 |