-/* Copyright (C) 1991, 92, 93, 96 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2020 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#include <sysdeps/generic/sysdep.h>
-
-#include <syscall.h>
+#include <single-thread.h>
+#include <sys/syscall.h>
#define HAVE_SYSCALLS
/* Note that using a `PASTE' macro loses. */
-#ifdef __STDC__
#define SYSCALL__(name, args) PSEUDO (__##name, name, args)
-#else
-#define SYSCALL__(name, args) PSEUDO (__/**/name, name, args)
-#endif
#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; \
+ })
+
+/* Issue a syscall defined by syscall number plus any other argument
+ required. Any error will be returned unmodified (including errno). */
+#define INTERNAL_SYSCALL_CANCEL(...) \
+ ({ \
+ long int sc_ret; \
+ if (SINGLE_THREAD_P) \
+ sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \
+ else \
+ { \
+ int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \
+ sc_ret = INTERNAL_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.
an instruction such that "MOVE(r1, r0)" works. ret should be defined
as the return instruction. */
-#ifdef __STDC__
+#ifndef SYS_ify
#define SYS_ify(syscall_name) SYS_##syscall_name
-#else
-#define SYS_ify(syscall_name) SYS_/**/syscall_name
#endif
/* Terminate a system call named SYM. This is used on some platforms
#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
projects / thirdparty / glibc.git / blobdiff