diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/m68k/nptl/sysdep-cancel.h')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/nptl/sysdep-cancel.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/nptl/sysdep-cancel.h b/ports/sysdeps/unix/sysv/linux/m68k/nptl/sysdep-cancel.h new file mode 100644 index 0000000000..249e0e29f7 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/nptl/sysdep-cancel.h @@ -0,0 +1,138 @@ +/* Copyright (C) 2010, 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010. + + 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 <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) \ + .text; \ + ENTRY (name) \ + SINGLE_THREAD_P; \ + jne .Lpseudo_cancel; \ + .type __##syscall_name##_nocancel,@function; \ + .globl __##syscall_name##_nocancel; \ + __##syscall_name##_nocancel: \ + DO_CALL (syscall_name, args); \ + cmp.l &-4095, %d0; \ + jcc SYSCALL_ERROR_LABEL; \ + rts; \ + .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ + .Lpseudo_cancel: \ + CENABLE; \ + DOCARGS_##args \ + move.l %d0, -(%sp); /* Save result of CENABLE. */ \ + cfi_adjust_cfa_offset (4); \ + move.l &SYS_ify (syscall_name), %d0; \ + trap &0; \ + move.l %d0, %d2; \ + CDISABLE; \ + addq.l &4, %sp; /* Remove result of CENABLE from the stack. */ \ + cfi_adjust_cfa_offset (-4); \ + move.l %d2, %d0; \ + UNDOCARGS_##args \ + cmp.l &-4095, %d0; \ + jcc SYSCALL_ERROR_LABEL + +/* Note: we use D2 to save syscall's return value as D0 will be clobbered in + CDISABLE. */ +# define DOCARGS_0 move.l %d2, -(%sp); \ + cfi_adjust_cfa_offset (4); cfi_rel_offset (%d2, 0); +# define UNDOCARGS_0 move.l (%sp)+, %d2; \ + cfi_adjust_cfa_offset (-4); cfi_restore (%d2); + +# define DOCARGS_1 _DOCARGS_1 (4); DOCARGS_0 +# define _DOCARGS_1(n) move.l n(%sp), %d1; +# define UNDOCARGS_1 UNDOCARGS_0 + +# define DOCARGS_2 _DOCARGS_2 (8) +# define _DOCARGS_2(n) DOCARGS_0 move.l n+4(%sp), %d2; _DOCARGS_1 (n) +# define UNDOCARGS_2 UNDOCARGS_0 + +/* TODO: We can optimize DOCARGS_{3, 4} by saving registers to a0 and a1 + instead of pushing them on stack. */ +# define DOCARGS_3 _DOCARGS_3 (12) +# define _DOCARGS_3(n) move.l %d3, -(%sp); \ + cfi_adjust_cfa_offset (4); cfi_rel_offset (%d3, 0); \ + move.l n+4(%sp), %d3; _DOCARGS_2 (n) +# define UNDOCARGS_3 UNDOCARGS_2 move.l (%sp)+, %d3; \ + cfi_adjust_cfa_offset (-4); cfi_restore (%d3); + +# define DOCARGS_4 _DOCARGS_4 (16) +# define _DOCARGS_4(n) move.l %d4, -(%sp); \ + cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \ + move.l n+4(%sp), %d4; _DOCARGS_3 (n) +# define UNDOCARGS_4 UNDOCARGS_3 move.l (%sp)+, %d4; \ + cfi_adjust_cfa_offset (-4); cfi_restore (%d4); + +# define DOCARGS_5 _DOCARGS_5 (20) +# define _DOCARGS_5(n) move.l %d5, %a1; cfi_register (%d5, a1); \ + move.l n(%sp), %d5; _DOCARGS_4 (n-4) +# define UNDOCARGS_5 UNDOCARGS_4 move.l %a1, %d5; cfi_restore (%d5); + +# define DOCARGS_6 _DOCARGS_6 (24) +# define _DOCARGS_6(n) move.l n(%sp), %a0; _DOCARGS_5 (n-4) +# define UNDOCARGS_6 UNDOCARGS_5 + +# ifdef PIC +# define PSEUDO_JMP(sym) jbsr sym ## @PLTPC +# else +# define PSEUDO_JMP(sym) jbsr sym +# endif + +# ifdef IS_IN_libpthread +# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel) +# elif !defined NOT_IN_libc +# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel) +# elif defined IS_IN_librt +# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__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 \ + PSEUDO_JMP (__m68k_read_tp); \ + tst.l MULTIPLE_THREADS_OFFSET(%a0) +# 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 |