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freebsd/sys/modules/linux/linux.c
Alexander Langer 514058dc0d Unregister the glibc2 brand at module unload time.
Change the ELF registration/unregistration scheme to be less error prone.
Adding a new brand requires a single addition to linux_brandlist instead of
modifying linux_load(), linux_unload(), and linux_elf_init().

Approved by:	jkh
Reviewed by:	msmith
1998-10-11 21:08:02 +00:00

88 lines
2.7 KiB
C

/*-
* Copyright (c) 1994 Søren Schmidt
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough 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.
*
* $Id: linux.c,v 1.13 1998/09/17 22:08:34 msmith Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/exec.h>
#include <sys/conf.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#include <sys/imgact_elf.h>
#include "i386/linux/linux.h"
extern const struct execsw linux_execsw;
MOD_EXEC(linux, -1, &linux_execsw);
extern Elf32_Brandinfo *linux_brandlist[];
static int
linux_load(struct lkm_table *lkmtp, int cmd)
{
Elf32_Brandinfo **brandinfo;
int error;
error = 0;
for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo)
if (elf_insert_brand_entry(*brandinfo) < 0)
error = 1;
if (error)
printf("Could not install ELF interpreter entry\n");
/* uprintf("Linux emulator installed\n"); XXX - shut up, you! */
return 0;
}
static int
linux_unload(struct lkm_table *lkmtp, int cmd)
{
Elf32_Brandinfo **brandinfo;
int error;
error = 0;
for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; ++brandinfo)
if (elf_remove_brand_entry(*brandinfo) < 0)
error = 1;
if (error)
uprintf("Could not deinstall ELF interpreter entry\n");
uprintf("Linux emulator removed\n");
return 0;
}
int
linux_mod(struct lkm_table *lkmtp, int cmd, int ver)
{
MOD_DISPATCH(linux,lkmtp, cmd, ver,
linux_load, linux_unload, lkm_nullcmd);
}