| /* Copyright (C) 2002-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jakub Jelinek <jakub@redhat.com>, 2002. |
| |
| 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) \ |
| cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \ |
| jne L(pseudo_cancel); \ |
| .type __##syscall_name##_nocancel,@function; \ |
| .globl __##syscall_name##_nocancel; \ |
| __##syscall_name##_nocancel: \ |
| DO_CALL (syscall_name, args); \ |
| cmpl $-4095, %eax; \ |
| jae SYSCALL_ERROR_LABEL; \ |
| ret; \ |
| .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ |
| L(pseudo_cancel): \ |
| CENABLE \ |
| SAVE_OLDTYPE_##args \ |
| PUSHCARGS_##args \ |
| DOCARGS_##args \ |
| movl $SYS_ify (syscall_name), %eax; \ |
| ENTER_KERNEL; \ |
| POPCARGS_##args; \ |
| POPSTATE_##args \ |
| cmpl $-4095, %eax; \ |
| jae SYSCALL_ERROR_LABEL |
| |
| # define SAVE_OLDTYPE_0 movl %eax, %ecx; |
| # define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0 |
| # define SAVE_OLDTYPE_2 pushl %eax; cfi_adjust_cfa_offset (4); |
| # define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2 |
| # define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2 |
| # define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2 |
| # define SAVE_OLDTYPE_6 SAVE_OLDTYPE_2 |
| |
| # define PUSHCARGS_0 /* No arguments to push. */ |
| # define DOCARGS_0 /* No arguments to frob. */ |
| # define POPCARGS_0 /* No arguments to pop. */ |
| # define _PUSHCARGS_0 /* No arguments to push. */ |
| # define _POPCARGS_0 /* No arguments to pop. */ |
| |
| # define PUSHCARGS_1 movl %ebx, %edx; cfi_register (ebx, edx); PUSHCARGS_0 |
| # define DOCARGS_1 _DOARGS_1 (4) |
| # define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; cfi_restore (ebx); |
| # define _PUSHCARGS_1 pushl %ebx; cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (ebx, 0); _PUSHCARGS_0 |
| # define _POPCARGS_1 _POPCARGS_0; popl %ebx; \ |
| cfi_adjust_cfa_offset (-4); cfi_restore (ebx); |
| |
| # define PUSHCARGS_2 PUSHCARGS_1 |
| # define DOCARGS_2 _DOARGS_2 (12) |
| # define POPCARGS_2 POPCARGS_1 |
| # define _PUSHCARGS_2 _PUSHCARGS_1 |
| # define _POPCARGS_2 _POPCARGS_1 |
| |
| # define PUSHCARGS_3 _PUSHCARGS_2 |
| # define DOCARGS_3 _DOARGS_3 (20) |
| # define POPCARGS_3 _POPCARGS_3 |
| # define _PUSHCARGS_3 _PUSHCARGS_2 |
| # define _POPCARGS_3 _POPCARGS_2 |
| |
| # define PUSHCARGS_4 _PUSHCARGS_4 |
| # define DOCARGS_4 _DOARGS_4 (28) |
| # define POPCARGS_4 _POPCARGS_4 |
| # define _PUSHCARGS_4 pushl %esi; cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (esi, 0); _PUSHCARGS_3 |
| # define _POPCARGS_4 _POPCARGS_3; popl %esi; \ |
| cfi_adjust_cfa_offset (-4); cfi_restore (esi); |
| |
| # define PUSHCARGS_5 _PUSHCARGS_5 |
| # define DOCARGS_5 _DOARGS_5 (36) |
| # define POPCARGS_5 _POPCARGS_5 |
| # define _PUSHCARGS_5 pushl %edi; cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (edi, 0); _PUSHCARGS_4 |
| # define _POPCARGS_5 _POPCARGS_4; popl %edi; \ |
| cfi_adjust_cfa_offset (-4); cfi_restore (edi); |
| |
| # define PUSHCARGS_6 _PUSHCARGS_6 |
| # define DOCARGS_6 _DOARGS_6 (44) |
| # define POPCARGS_6 _POPCARGS_6 |
| # define _PUSHCARGS_6 pushl %ebp; cfi_adjust_cfa_offset (4); \ |
| cfi_rel_offset (ebp, 0); _PUSHCARGS_5 |
| # define _POPCARGS_6 _POPCARGS_5; popl %ebp; \ |
| cfi_adjust_cfa_offset (-4); cfi_restore (ebp); |
| |
| # ifdef IS_IN_libpthread |
| # define CENABLE call __pthread_enable_asynccancel; |
| # define CDISABLE call __pthread_disable_asynccancel |
| # elif !defined NOT_IN_libc |
| # define CENABLE call __libc_enable_asynccancel; |
| # define CDISABLE call __libc_disable_asynccancel |
| # elif defined IS_IN_librt |
| # define CENABLE call __librt_enable_asynccancel; |
| # define CDISABLE call __librt_disable_asynccancel |
| # else |
| # error Unsupported library |
| # endif |
| # define POPSTATE_0 \ |
| pushl %eax; cfi_adjust_cfa_offset (4); movl %ecx, %eax; \ |
| CDISABLE; popl %eax; cfi_adjust_cfa_offset (-4); |
| # define POPSTATE_1 POPSTATE_0 |
| # define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; \ |
| cfi_adjust_cfa_offset (-4); |
| # define POPSTATE_3 POPSTATE_2 |
| # define POPSTATE_4 POPSTATE_3 |
| # define POPSTATE_5 POPSTATE_4 |
| # define POPSTATE_6 POPSTATE_5 |
| |
| # ifndef __ASSEMBLER__ |
| # define SINGLE_THREAD_P \ |
| __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ |
| header.multiple_threads) == 0, 1) |
| # else |
| # define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET |
| # 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 |