| /* Copyright (C) 2010-2014 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 |
| |
| # 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, -(%sp); \ |
| cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \ |
| move.l n+4(%sp), %d5; _DOCARGS_4 (n) |
| # define UNDOCARGS_5 UNDOCARGS_4 move.l (%sp)+, %d5; \ |
| cfi_adjust_cfa_offset (-4); 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 |
