diff options
Diffstat (limited to 'lib/libc/arch/powerpc64/SYS.h')
| -rw-r--r-- | lib/libc/arch/powerpc64/SYS.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/libc/arch/powerpc64/SYS.h b/lib/libc/arch/powerpc64/SYS.h new file mode 100644 index 00000000000..1d354cbc2ae --- /dev/null +++ b/lib/libc/arch/powerpc64/SYS.h @@ -0,0 +1,99 @@ +/* $OpenBSD: SYS.h,v 1.1 2020/06/25 01:59:27 drahn Exp $ */ +/*- + * Copyright (c) 1994 + * Andrew Cagney. 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 "DEFS.h" +#include <sys/syscall.h> + +/* r0 will be a non zero errno if there was an error, while r3/r4 will + contain the return value */ + +#include "machine/asm.h" + + +/* offsetof(struct tib, tib_errno) - offsetof(struct tib, __tib_tcb) */ +#define TCB_OFFSET_ERRNO (-8) +/* from <powerpc/tcb.h>: TCB address == %r2 - TCB_OFFSET */ +#define TCB_OFFSET 0x7000 + +/* offset of errno from %r2 */ +#define R13_OFFSET_ERRNO (-TCB_OFFSET + TCB_OFFSET_ERRNO) + +#define _CONCAT(x,y) x##y +#define PSEUDO_PREFIX(p,x,y) \ + ENTRY(p##x) \ + li %r0, SYS_##y ; \ + /* sc */ +#define PSEUDO_SUFFIX cmpwi %r0, 0 ; \ + beqlr ; \ + stw %r0, R13_OFFSET_ERRNO(%r13); \ + li %r3, -1; \ + blr + +#define PSEUDO_NOERROR_SUFFIX blr + +#define __END_HIDDEN(p,x) END(p##x); \ + _HIDDEN_FALIAS(x,p##x); \ + END(_HIDDEN(x)) +#define __END(p,x) __END_HIDDEN(p,x); END(x) + + +#define ALIAS(x,y) WEAK_ALIAS(y,_CONCAT(x,y)); + +#define PREFIX_HIDDEN(x) PSEUDO_PREFIX(_thread_sys_,x,x) +#define PREFIX(x) ALIAS(_thread_sys_,x) \ + PREFIX_HIDDEN(x) +#define PSEUDO_NOERROR(x,y) ALIAS(_thread_sys_,x) \ + PSEUDO_PREFIX(_thread_sys_,x,y) ; \ + sc ; \ + PSEUDO_NOERROR_SUFFIX; \ + __END(_thread_sys_,x) + +#define PSEUDO_HIDDEN(x,y) PSEUDO_PREFIX(_thread_sys_,x,y) ; \ + sc ; \ + PSEUDO_SUFFIX; \ + __END_HIDDEN(_thread_sys_,x) +#define PSEUDO(x,y) ALIAS(_thread_sys_,x) \ + PSEUDO_HIDDEN(x,y); \ + END(x) + +#define RSYSCALL(x) PSEUDO(x,x) +#define RSYSCALL_HIDDEN(x) PSEUDO_HIDDEN(x,x) +#define SYSCALL_END_HIDDEN(x) __END_HIDDEN(_thread_sys_,x) +#define SYSCALL_END(x) __END(_thread_sys_,x) + |