| /* Copyright (C) 1991-2018 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) |
| |
| #define __SYSCALL_CONCAT_X(a,b) a##b |
| #define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X (a, b) |
| |
| |
| #define __INTERNAL_SYSCALL0(name, err) \ |
| INTERNAL_SYSCALL (name, err, 0) |
| #define __INTERNAL_SYSCALL1(name, err, a1) \ |
| INTERNAL_SYSCALL (name, err, 1, a1) |
| #define __INTERNAL_SYSCALL2(name, err, a1, a2) \ |
| INTERNAL_SYSCALL (name, err, 2, a1, a2) |
| #define __INTERNAL_SYSCALL3(name, err, a1, a2, a3) \ |
| INTERNAL_SYSCALL (name, err, 3, a1, a2, a3) |
| #define __INTERNAL_SYSCALL4(name, err, a1, a2, a3, a4) \ |
| INTERNAL_SYSCALL (name, err, 4, a1, a2, a3, a4) |
| #define __INTERNAL_SYSCALL5(name, err, a1, a2, a3, a4, a5) \ |
| INTERNAL_SYSCALL (name, err, 5, a1, a2, a3, a4, a5) |
| #define __INTERNAL_SYSCALL6(name, err, a1, a2, a3, a4, a5, a6) \ |
| INTERNAL_SYSCALL (name, err, 6, a1, a2, a3, a4, a5, a6) |
| #define __INTERNAL_SYSCALL7(name, err, a1, a2, a3, a4, a5, a6, a7) \ |
| INTERNAL_SYSCALL (name, err, 7, a1, a2, a3, a4, a5, a6, a7) |
| |
| #define __INTERNAL_SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,o,...) o |
| #define __INTERNAL_SYSCALL_NARGS(...) \ |
| __INTERNAL_SYSCALL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,) |
| #define __INTERNAL_SYSCALL_DISP(b,...) \ |
| __SYSCALL_CONCAT (b,__INTERNAL_SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__) |
| |
| /* Issue a syscall defined by syscall number plus any other argument required. |
| It is similar to INTERNAL_SYSCALL macro, but without the need to pass the |
| expected argument number as second parameter. */ |
| #define INTERNAL_SYSCALL_CALL(...) \ |
| __INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL, __VA_ARGS__) |
| |
| #define __INLINE_SYSCALL0(name) \ |
| INLINE_SYSCALL (name, 0) |
| #define __INLINE_SYSCALL1(name, a1) \ |
| INLINE_SYSCALL (name, 1, a1) |
| #define __INLINE_SYSCALL2(name, a1, a2) \ |
| INLINE_SYSCALL (name, 2, a1, a2) |
| #define __INLINE_SYSCALL3(name, a1, a2, a3) \ |
| INLINE_SYSCALL (name, 3, a1, a2, a3) |
| #define __INLINE_SYSCALL4(name, a1, a2, a3, a4) \ |
| INLINE_SYSCALL (name, 4, a1, a2, a3, a4) |
| #define __INLINE_SYSCALL5(name, a1, a2, a3, a4, a5) \ |
| INLINE_SYSCALL (name, 5, a1, a2, a3, a4, a5) |
| #define __INLINE_SYSCALL6(name, a1, a2, a3, a4, a5, a6) \ |
| INLINE_SYSCALL (name, 6, a1, a2, a3, a4, a5, a6) |
| #define __INLINE_SYSCALL7(name, a1, a2, a3, a4, a5, a6, a7) \ |
| INLINE_SYSCALL (name, 7, a1, a2, a3, a4, a5, a6, a7) |
| |
| #define __INLINE_SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n |
| #define __INLINE_SYSCALL_NARGS(...) \ |
| __INLINE_SYSCALL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,) |
| #define __INLINE_SYSCALL_DISP(b,...) \ |
| __SYSCALL_CONCAT (b,__INLINE_SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__) |
| |
| /* Issue a syscall defined by syscall number plus any other argument |
| required. Any error will be handled using arch defined macros and errno |
| will be set accordingly. |
| It is similar to INLINE_SYSCALL macro, but without the need to pass the |
| expected argument number as second parameter. */ |
| #define INLINE_SYSCALL_CALL(...) \ |
| __INLINE_SYSCALL_DISP (__INLINE_SYSCALL, __VA_ARGS__) |
| |
| #define SYSCALL_CANCEL(...) \ |
| ({ \ |
| long int sc_ret; \ |
| if (SINGLE_THREAD_P) \ |
| sc_ret = INLINE_SYSCALL_CALL (__VA_ARGS__); \ |
| else \ |
| { \ |
| int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \ |
| sc_ret = INLINE_SYSCALL_CALL (__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 |