ff76632189
linux_emul_find() that does not use stack gap storage but instead always returns the resulting path in a malloc'd kernel buffer. Implement linux_emul_find() in terms of this function. Also add LCONVPATH* macros that wrap linux_emul_convpath in the same way that the CHECKALT* macros wrap linux_emul_find().
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/*
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* Copyright (c) 1994 Christos Zoulas
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* Copyright (c) 1995 Frank van der Linden
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* Copyright (c) 1995 Scott Bartram
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
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* from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
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* $FreeBSD$
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*/
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/*
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* This file is pretty much the same as Christos' svr4_util.h
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* (for now).
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*/
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#ifndef _LINUX_UTIL_H_
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#define _LINUX_UTIL_H_
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <machine/vmparam.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/cdefs.h>
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#include <sys/uio.h>
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static __inline caddr_t stackgap_init(void);
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static __inline void *stackgap_alloc(caddr_t *, size_t);
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#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
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static __inline caddr_t
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stackgap_init()
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{
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return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE);
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}
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static __inline void *
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stackgap_alloc(sgp, sz)
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caddr_t *sgp;
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size_t sz;
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{
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void *p = (void *) *sgp;
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sz = ALIGN(sz);
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if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode))
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return NULL;
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*sgp += sz;
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return p;
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}
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extern const char linux_emul_path[];
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int linux_emul_convpath(struct thread *, char *, enum uio_seg, char **, int);
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int linux_emul_find(struct thread *, caddr_t *, char *, char **, int);
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#define CHECKALT(p, sgp, path, i) \
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do { \
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int _error; \
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\
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_error = linux_emul_find(p, sgp, path, &path, i); \
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if (_error == EFAULT) \
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return (_error); \
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} while (0)
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#define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0)
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#define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1)
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#define LCONVPATH(td, upath, pathp, i) \
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do { \
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int _error; \
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\
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_error = linux_emul_convpath(td, upath, UIO_USERSPACE, \
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pathp, i); \
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if (*(pathp) == NULL) \
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return (_error); \
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} while (0)
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#define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0)
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#define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1)
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#define LFREEPATH(path) free(path, M_TEMP)
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#define DUMMY(s) \
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int \
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linux_ ## s(struct thread *p, struct linux_ ## s ## _args *args) \
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{ \
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return (unsupported_msg(p, #s)); \
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} \
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struct __hack
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static __inline int
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unsupported_msg(struct thread *td, const char *fname)
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{
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printf("linux: syscall %s is obsoleted or not implemented (pid=%ld)\n",
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fname, (long)td->td_proc->p_pid);
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return (ENOSYS);
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}
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#endif /* !_LINUX_UTIL_H_ */
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