diff options
Diffstat (limited to 'lib/libc/mips/SYS.h')
| -rw-r--r-- | lib/libc/mips/SYS.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/lib/libc/mips/SYS.h b/lib/libc/mips/SYS.h new file mode 100644 index 0000000..10205b8 --- /dev/null +++ b/lib/libc/mips/SYS.h @@ -0,0 +1,137 @@ +/* $NetBSD: SYS.h,v 1.19 2009/12/14 01:07:41 matt Exp $ */ +/* $FreeBSD$ */ + +/*- + * Copyright (c) 1996 Jonathan Stone + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Jonathan Stone for + * the NetBSD Project. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Ralph Campbell. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: @(#)SYS.h 8.1 (Berkeley) 6/4/93 + */ + +#include <sys/syscall.h> + +#include <machine/asm.h> + +/* + * If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops. + * + * i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after. + * ii) Do interprocedure jumps indirectly via t9, with the side-effect of + * preserving the callee's entry address in t9. + */ +#ifdef __ABICALLS__ + .abicalls +# if defined(__mips_o32) || defined(__mips_o64) +# define PIC_PROLOGUE(x) SETUP_GP +# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9 +# define PIC_RETURN() j ra +# else +# define PIC_PROLOGUE(x) SETUP_GP64(t3, x) +# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9 +# define PIC_RETURN() RESTORE_GP64; j ra +# endif +#else +# define PIC_PROLOGUE(x) +# define PIC_TAILCALL(l) j _C_LABEL(l) +# define PIC_RETURN() j ra +#endif /* __ABICALLS__ */ + +# define SYSTRAP(x) li v0,SYS_ ## x; syscall; + +/* + * Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id) + */ +#define RSYSCALL_NOERROR(x) \ + PSEUDO_NOERROR(x) + +/* + * Do a normal syscall. + */ +#define RSYSCALL(x) \ + PSEUDO(x) + +/* + * Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint + * and syscall name are not the same. + */ +#define PSEUDO_NOERROR(x) \ +LEAF(__sys_ ## x); \ + .weak _C_LABEL(x); \ + _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \ + .weak _C_LABEL(__CONCAT(_,x)); \ + _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \ + SYSTRAP(x); \ + j ra; \ + END(__sys_ ## x) + +#define PSEUDO(x) \ +LEAF(__sys_ ## x); \ + .weak _C_LABEL(x); \ + _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \ + .weak _C_LABEL(__CONCAT(_,x)); \ + _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \ + PIC_PROLOGUE(__sys_ ## x); \ + SYSTRAP(x); \ + bne a3,zero,err; \ + PIC_RETURN(); \ +err: \ + PIC_TAILCALL(__cerror); \ +END(__sys_ ## x) |
