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freebsd/sys/amd64/ia32/ia32_misc.c
Konstantin Belousov 7332c129e0 Add support for executing the FreeBSD 1/i386 a.out binaries on amd64.
In particular:
- implement compat shims for old stat(2) variants and ogetdirentries(2);
- implement delivery of signals with ancient stack frame layout and
  corresponding sigreturn(2);
- implement old getpagesize(2);
- provide a user-mode trampoline and LDT call gate for lcall $7,$0;
- port a.out image activator and connect it to the build as a module
  on amd64.

The changes are hidden under COMPAT_43.

MFC after:   1 month
2011-04-01 11:16:29 +00:00

83 lines
2.6 KiB
C

/*-
* Copyright (c) 2009 Konstantin Belousov
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <machine/cpu.h>
#include <machine/sysarch.h>
#include <compat/freebsd32/freebsd32_util.h>
#include <compat/freebsd32/freebsd32.h>
#include <compat/freebsd32/freebsd32_proto.h>
int
freebsd32_sysarch(struct thread *td, struct freebsd32_sysarch_args *uap)
{
struct sysarch_args uap1;
struct i386_ldt_args uapl;
struct i386_ldt_args32 uapl32;
int error;
if (uap->op == I386_SET_LDT || uap->op == I386_GET_LDT) {
if ((error = copyin(uap->parms, &uapl32, sizeof(uapl32))) != 0)
return (error);
uap1.op = uap->op;
uap1.parms = (char *)&uapl;
uapl.start = uapl32.start;
uapl.descs = (struct user_segment_descriptor *)(uintptr_t)
uapl32.descs;
uapl.num = uapl32.num;
return (sysarch_ldt(td, &uap1, UIO_SYSSPACE));
} else {
uap1.op = uap->op;
uap1.parms = uap->parms;
return (sysarch(td, &uap1));
}
}
#ifdef COMPAT_43
int
ofreebsd32_getpagesize(struct thread *td,
struct ofreebsd32_getpagesize_args *uap)
{
td->td_retval[0] = IA32_PAGE_SIZE;
return (0);
}
#endif