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Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysdep.h')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysdep.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysdep.h b/REORG.TODO/sysdeps/unix/sysdep.h new file mode 100644 index 0000000000..c308547dec --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysdep.h @@ -0,0 +1,132 @@ +/* Copyright (C) 1991-2017 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 |