| /* Copyright (C) 1991-2015 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 <sysdeps/generic/sysdep.h> |
| |
| #include <sys/syscall.h> |
| #define HAVE_SYSCALLS |
| |
| /* Note that using a `PASTE' macro loses. */ |
| #define SYSCALL__(name, args) PSEUDO (__##name, name, args) |
| #define SYSCALL(name, args) PSEUDO (name, name, args) |
| |
| /* Cancellation macros. */ |
| #define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,n,...) n |
| #define __SYSCALL_NARGS(...) \ |
| __SYSCALL_NARGS_X (__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0,) |
| |
| #define SYSCALL_CANCEL(name, ...) \ |
| ({ \ |
| long int sc_ret; \ |
| if (SINGLE_THREAD_P) \ |
| sc_ret = INLINE_SYSCALL (name, __SYSCALL_NARGS(__VA_ARGS__), \ |
| __VA_ARGS__); \ |
| else \ |
| { \ |
| int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \ |
| sc_ret = INLINE_SYSCALL (name, __SYSCALL_NARGS (__VA_ARGS__), \ |
| __VA_ARGS__); \ |
| LIBC_CANCEL_RESET (sc_cancel_oldtype); \ |
| } \ |
| sc_ret; \ |
| }) |
| |
| /* Machine-dependent sysdep.h files are expected to define the macro |
| PSEUDO (function_name, syscall_name) to emit assembly code to define the |
| C-callable function FUNCTION_NAME to do system call SYSCALL_NAME. |
| r0 and r1 are the system call outputs. MOVE(x, y) should be defined as |
| an instruction such that "MOVE(r1, r0)" works. ret should be defined |
| as the return instruction. */ |
| |
| #ifndef SYS_ify |
| #define SYS_ify(syscall_name) SYS_##syscall_name |
| #endif |
| |
| /* Terminate a system call named SYM. This is used on some platforms |
| to generate correct debugging information. */ |
| #ifndef PSEUDO_END |
| #define PSEUDO_END(sym) |
| #endif |
| #ifndef PSEUDO_END_NOERRNO |
| #define PSEUDO_END_NOERRNO(sym) PSEUDO_END(sym) |
| #endif |
| #ifndef PSEUDO_END_ERRVAL |
| #define PSEUDO_END_ERRVAL(sym) PSEUDO_END(sym) |
| #endif |
| |
| /* Wrappers around system calls should normally inline the system call code. |
| But sometimes it is not possible or implemented and we use this code. */ |
| #ifndef INLINE_SYSCALL |
| #define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args) |
| #endif |