Terry Lambert's loadable kernel module support w/improvements from the
NetBSD group.
This commit is contained in:
David Greenman
parent
6605d9f3db
commit
3edb235c09
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.52 1994/08/13 14:21:42 davidg Exp $
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* $Id: machdep.c,v 1.53 1994/08/18 22:34:40 wollman Exp $
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*/
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#include "npx.h"
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@ -1097,7 +1097,7 @@ init386(first)
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* page with etext in it, the data segment goes to the end of
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* the address space
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*/
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gdt_segs[GCODE_SEL].ssd_limit = i386_btop(i386_round_page(&etext)) - 1;
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gdt_segs[GCODE_SEL].ssd_limit = i386_btop(0) - 1 /* i386_btop(i386_round_page(&etext)) - 1 */;
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gdt_segs[GDATA_SEL].ssd_limit = i386_btop(0) - 1;
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for (x=0; x < NGDT; x++) ssdtosd(gdt_segs+x, gdt+x);
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@ -46,6 +46,7 @@ kern/kern_exit.c standard
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kern/kern_fork.c standard
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kern/kern_ktrace.c standard
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kern/kern_lockf.c standard
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kern/kern_lkm.c optional lkm
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kern/kern_malloc.c standard
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kern/kern_physio.c standard
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kern/kern_proc.c standard
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@ -41,7 +41,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)conf.c 5.8 (Berkeley) 5/12/91
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* $Id: conf.c,v 1.26 1994/05/25 08:52:45 rgrimes Exp $
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* $Id: conf.c,v 1.27 1994/08/18 22:34:39 wollman Exp $
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*/
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#include <sys/param.h>
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@ -69,6 +69,35 @@ typedef int d_mmap_t __P((/* XXX */));
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d_rdwr_t rawread, rawwrite;
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d_strategy_t swstrategy;
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#ifdef LKM
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int lkmenodev();
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#define lkmopen (d_open_t *)lkmenodev
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#define lkmclose (d_close_t *)lkmenodev
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#define lkmread (d_rdwr_t *)lkmenodev
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#define lkmwrite (d_rdwr_t *)lkmenodev
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#define lkmstrategy (d_strategy_t *)lkmenodev
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#define lkmioctl (d_ioctl_t *)lkmenodev
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#define lkmdump (d_dump_t *)lkmenodev
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#define lkmsize (d_psize_t *)0
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#define lkmstop (d_stop_t *)lkmenodev
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#define lkmreset (d_reset_t *)lkmenodev
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#define lkmmmap (d_mmap_t *)lkmenodev
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#define lkmselect (d_select_t *)lkmenodev
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#else
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#define lkmopen (d_open_t *)enxio
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#define lkmclose (d_close_t *)enxio
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#define lkmread (d_rdwr_t *)enxio
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#define lkmwrite (d_rdwr_t *)enxio
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#define lkmstrategy (d_strategy_t *)enxio
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#define lkmioctl (d_ioctl_t *)enxio
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#define lkmdump (d_dump_t *)enxio
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#define lkmsize (d_psize_t *)0
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#define lkmstop (d_stop_t *)enxio
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#define lkmreset (d_reset_t *)enxio
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#define lkmmmap (d_mmap_t *)enxio
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#define lkmselect (d_select_t *)enxio
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#endif
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#include "wd.h"
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#if (NWD > 0)
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d_open_t wdopen;
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@ -226,7 +255,21 @@ struct bdevsw bdevsw[] =
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cddump, cdsize, 0 },
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{ mcdopen, mcdclose, mcdstrategy, mcdioctl, /*7*/
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mcddump, mcdsize, 0 },
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{ 0, } /* block major 8 is reserved for local use */
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#ifdef LKM
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*8*/
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lkmdump, lkmsize, NULL },
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*9*/
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lkmdump, lkmsize, NULL },
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*10*/
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lkmdump, lkmsize, NULL },
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*11*/
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lkmdump, lkmsize, NULL },
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*12*/
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lkmdump, lkmsize, NULL },
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{ lkmopen, lkmclose, lkmstrategy, lkmioctl, /*13*/
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lkmdump, lkmsize, NULL },
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#endif
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{ 0, } /* block major 14 is reserved for local use */
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/*
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* If you need a bdev major number, please contact the FreeBSD team
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* by sending mail to "FreeBSD-hackers@freefall.cdrom.com".
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@ -503,6 +546,16 @@ d_ioctl_t ukioctl;
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#define ukioctl (d_ioctl_t *)enxio
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#endif
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#ifdef LKM
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d_open_t lkmcopen;
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d_close_t lkmcclose;
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d_ioctl_t lkmcioctl;
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#else
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#define lkmcopen (d_open_t *)enxio
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#define lkmcclose (d_close_t *)enxio
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#define lkmcioctl (d_ioctl_t *)enxio
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#endif
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#define noopen (d_open_t *)enodev
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#define noclose (d_close_t *)enodev
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#define noread (d_rdwr_t *)enodev
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@ -618,6 +671,27 @@ struct cdevsw cdevsw[] =
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{ ukopen, ukclose, noread, nowrite, /*31*/
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ukioctl, nostop, nullreset, NULL, /* unknown */
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seltrue, nommap, NULL }, /* scsi */
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{ lkmcopen, lkmcclose, noread, nowrite, /*32*/
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lkmcioctl, nostop, nullreset, NULL,
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noselect, nommap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*33*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*34*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*35*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*36*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*37*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ lkmopen, lkmclose, lkmread, lkmwrite, /*38*/
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lkmioctl, lkmstop, lkmreset, NULL,
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lkmselect, lkmmmap, NULL },
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{ 0, } /* character device 32 is reserved for local use */
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/*
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* If you need a cdev major number, please contact the FreeBSD team
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.52 1994/08/13 14:21:42 davidg Exp $
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* $Id: machdep.c,v 1.53 1994/08/18 22:34:40 wollman Exp $
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*/
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#include "npx.h"
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@ -1097,7 +1097,7 @@ init386(first)
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* page with etext in it, the data segment goes to the end of
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* the address space
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*/
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gdt_segs[GCODE_SEL].ssd_limit = i386_btop(i386_round_page(&etext)) - 1;
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gdt_segs[GCODE_SEL].ssd_limit = i386_btop(0) - 1 /* i386_btop(i386_round_page(&etext)) - 1 */;
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gdt_segs[GDATA_SEL].ssd_limit = i386_btop(0) - 1;
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for (x=0; x < NGDT; x++) ssdtosd(gdt_segs+x, gdt+x);
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@ -2,7 +2,7 @@
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* System call switch table.
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*
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* DO NOT EDIT-- this file is automatically generated.
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* created from @(#)syscalls.master 8.2 (Berkeley) 1/13/94
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* created from $Id: syscalls.master,v 1.3 1994/08/02 07:42:44 davidg Exp $
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*/
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#include <sys/param.h>
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@ -172,6 +172,19 @@ int ftruncate();
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int __sysctl();
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int mlock();
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int munlock();
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#ifdef LKM
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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int lkmnosys();
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#else
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#endif
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#ifdef COMPAT_43
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#define compat(n, name) n, __CONCAT(o,name)
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@ -231,6 +244,9 @@ int ogetdirentries();
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#ifdef LFS
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#else
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#endif
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#ifdef LKM
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#else
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#endif
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#else /* COMPAT_43 */
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#define compat(n, name) 0, nosys
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@ -478,7 +494,29 @@ struct sysent sysent[] = {
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{ 0, nosys }, /* 207 = nosys */
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{ 0, nosys }, /* 208 = nosys */
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{ 0, nosys }, /* 209 = nosys */
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#ifdef LKM
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{ 0, lkmnosys }, /* 210 = lkmnosys */
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{ 0, lkmnosys }, /* 211 = lkmnosys */
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{ 0, lkmnosys }, /* 212 = lkmnosys */
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{ 0, lkmnosys }, /* 213 = lkmnosys */
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{ 0, lkmnosys }, /* 214 = lkmnosys */
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{ 0, lkmnosys }, /* 215 = lkmnosys */
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{ 0, lkmnosys }, /* 216 = lkmnosys */
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{ 0, lkmnosys }, /* 217 = lkmnosys */
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{ 0, lkmnosys }, /* 218 = lkmnosys */
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{ 0, lkmnosys }, /* 219 = lkmnosys */
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#else
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{ 0, nosys }, /* 210 = nosys */
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{ 0, nosys }, /* 211 = nosys */
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{ 0, nosys }, /* 212 = nosys */
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{ 0, nosys }, /* 213 = nosys */
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{ 0, nosys }, /* 214 = nosys */
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{ 0, nosys }, /* 215 = nosys */
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{ 0, nosys }, /* 216 = nosys */
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{ 0, nosys }, /* 217 = nosys */
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{ 0, nosys }, /* 218 = nosys */
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{ 0, nosys }, /* 219 = nosys */
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#endif
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};
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int nsysent = sizeof(sysent) / sizeof(sysent[0]);
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889
sys/kern/kern_lkm.c
Normal file
889
sys/kern/kern_lkm.c
Normal file
@ -0,0 +1,889 @@
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/* $NetBSD: kern_lkm.c,v 1.18 1994/06/29 06:32:31 cgd Exp $ */
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/*
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* Copyright (c) 1994 Christopher G. Demetriou
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* Copyright (c) 1992 Terrence R. Lambert.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Terrence R. Lambert.
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* 4. The name Terrence R. Lambert may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* XXX it's not really safe to unload *any* of the types which are
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* currently loadable; e.g. you could unload a syscall which was being
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* blocked in, etc. In the long term, a solution should be come up
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* with, but "not right now." -- cgd
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/imgact.h>
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#include <sys/lkm.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_kern.h>
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#define PAGESIZE 1024 /* kmem_alloc() allocation quantum */
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#define LKM_ALLOC 0x01
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#define LKM_WANT 0x02
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#define LKMS_IDLE 0x00
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#define LKMS_RESERVED 0x01
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#define LKMS_LOADING 0x02
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#define LKMS_LOADED 0x04
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#define LKMS_UNLOADING 0x08
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static int lkm_v = 0;
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static int lkm_state = LKMS_IDLE;
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#ifndef MAXLKMS
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#define MAXLKMS 20
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#endif
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static struct lkm_table lkmods[MAXLKMS]; /* table of loaded modules */
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static struct lkm_table *curp; /* global for in-progress ops */
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/*ARGSUSED*/
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int
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lkmcopen(dev, flag, devtype, p)
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dev_t dev;
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int flag;
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int devtype;
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struct proc *p;
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{
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int error;
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if (minor(dev) != 0)
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return(ENXIO); /* bad minor # */
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/*
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* Use of the loadable kernel module device must be exclusive; we
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* may try to remove this restriction later, but it's really no
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* hardship.
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*/
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while (lkm_v & LKM_ALLOC) {
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if (flag & FNONBLOCK) /* don't hang */
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return(EBUSY);
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lkm_v |= LKM_WANT;
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/*
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* Sleep pending unlock; we use tsleep() to allow
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* an alarm out of the open.
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*/
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if (error = tsleep((caddr_t)&lkm_v, TTIPRI|PCATCH, "lkmopn", 0))
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return(error); /* leave LKM_WANT set -- no problem */
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}
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lkm_v |= LKM_ALLOC;
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return(0); /* pseudo-device open */
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}
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/*
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* Unreserve the memory associated with the current loaded module; done on
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* a coerced close of the lkm device (close on premature exit of modload)
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* or explicitly by modload as a result of a link failure.
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*/
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static void
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lkmunreserve()
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{
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if (lkm_state == LKMS_IDLE)
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return;
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/*
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* Actually unreserve the memory
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*/
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if (curp && curp->area) {
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kmem_free(kmem_map, curp->area, curp->size);/**/
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curp->area = 0;
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}
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lkm_state = LKMS_IDLE;
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}
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int
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lkmcclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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if (!(lkm_v & LKM_ALLOC)) {
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#ifdef DEBUG
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printf("LKM: close before open!\n");
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#endif /* DEBUG */
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return(EBADF);
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}
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/* do this before waking the herd... */
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if (curp && !curp->used) {
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/*
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* If we close before setting used, we have aborted
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* by way of error or by way of close-on-exit from
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* a premature exit of "modload".
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*/
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lkmunreserve(); /* coerce state to LKM_IDLE */
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}
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lkm_v &= ~LKM_ALLOC;
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wakeup((caddr_t)&lkm_v); /* thundering herd "problem" here */
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return(0); /* pseudo-device closed */
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}
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/*ARGSUSED*/
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int
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lkmcioctl(dev, cmd, data, flag)
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dev_t dev;
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int cmd;
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caddr_t data;
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int flag;
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{
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int err = 0;
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int i;
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struct lmc_resrv *resrvp;
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struct lmc_loadbuf *loadbufp;
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struct lmc_unload *unloadp;
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struct lmc_stat *statp;
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int (*funcp)();
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char istr[MAXLKMNAME];
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switch(cmd) {
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case LMRESERV: /* reserve pages for a module */
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if ((flag & FWRITE) == 0) /* only allow this if writing */
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return EPERM;
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resrvp = (struct lmc_resrv *)data;
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/*
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* Find a free slot.
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*/
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for (i = 0; i < MAXLKMS; i++)
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if (!lkmods[i].used)
|
||||
break;
|
||||
if (i == MAXLKMS) {
|
||||
err = ENOMEM; /* no slots available */
|
||||
break;
|
||||
}
|
||||
curp = &lkmods[i];
|
||||
curp->id = i; /* self reference slot offset */
|
||||
|
||||
resrvp->slot = i; /* return slot */
|
||||
|
||||
/*
|
||||
* Get memory for module
|
||||
*/
|
||||
curp->size = resrvp->size;
|
||||
|
||||
curp->area = kmem_alloc(kmem_map, curp->size);/**/
|
||||
|
||||
curp->offset = 0; /* load offset */
|
||||
|
||||
resrvp->addr = curp->area; /* ret kernel addr */
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("LKM: LMRESERV (actual = 0x%08x)\n", curp->area);
|
||||
printf("LKM: LMRESERV (adjusted = 0x%08x)\n",
|
||||
trunc_page(curp->area));
|
||||
#endif /* DEBUG */
|
||||
lkm_state = LKMS_RESERVED;
|
||||
break;
|
||||
|
||||
case LMLOADBUF: /* Copy in; stateful, follows LMRESERV */
|
||||
if ((flag & FWRITE) == 0) /* only allow this if writing */
|
||||
return EPERM;
|
||||
|
||||
loadbufp = (struct lmc_loadbuf *)data;
|
||||
i = loadbufp->cnt;
|
||||
if ((lkm_state != LKMS_RESERVED && lkm_state != LKMS_LOADING)
|
||||
|| i < 0
|
||||
|| i > MODIOBUF
|
||||
|| i > curp->size - curp->offset) {
|
||||
err = ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
/* copy in buffer full of data */
|
||||
if (err = copyin((caddr_t)loadbufp->data, (caddr_t)curp->area + curp->offset, i))
|
||||
break;
|
||||
|
||||
if ((curp->offset + i) < curp->size) {
|
||||
lkm_state = LKMS_LOADING;
|
||||
#ifdef DEBUG
|
||||
printf("LKM: LMLOADBUF (loading @ %d of %d, i = %d)\n",
|
||||
curp->offset, curp->size, i);
|
||||
#endif /* DEBUG */
|
||||
} else {
|
||||
lkm_state = LKMS_LOADED;
|
||||
#ifdef DEBUG
|
||||
printf("LKM: LMLOADBUF (loaded)\n");
|
||||
#endif /* DEBUG */
|
||||
}
|
||||
curp->offset += i;
|
||||
break;
|
||||
|
||||
case LMUNRESRV: /* discard reserved pages for a module */
|
||||
if ((flag & FWRITE) == 0) /* only allow this if writing */
|
||||
return EPERM;
|
||||
|
||||
lkmunreserve(); /* coerce state to LKM_IDLE */
|
||||
#ifdef DEBUG
|
||||
printf("LKM: LMUNRESERV\n");
|
||||
#endif /* DEBUG */
|
||||
break;
|
||||
|
||||
case LMREADY: /* module loaded: call entry */
|
||||
if ((flag & FWRITE) == 0) /* only allow this if writing */
|
||||
return EPERM;
|
||||
|
||||
switch (lkm_state) {
|
||||
case LKMS_LOADED:
|
||||
break;
|
||||
case LKMS_LOADING:
|
||||
/* The remainder must be bss, so we clear it */
|
||||
bzero((caddr_t)curp->area + curp->offset,
|
||||
curp->size - curp->offset);
|
||||
break;
|
||||
default:
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("lkm_state is %02x\n", lkm_state);
|
||||
#endif /* DEBUG */
|
||||
return ENXIO;
|
||||
}
|
||||
|
||||
curp->entry = (int (*)()) (*((int *) (data)));
|
||||
|
||||
/* call entry(load)... (assigns "private" portion) */
|
||||
if (err = (*(curp->entry))(curp, LKM_E_LOAD, LKM_VERSION)) {
|
||||
/*
|
||||
* Module may refuse loading or may have a
|
||||
* version mismatch...
|
||||
*/
|
||||
lkm_state = LKMS_UNLOADING; /* for lkmunreserve */
|
||||
lkmunreserve(); /* free memory */
|
||||
curp->used = 0; /* free slot */
|
||||
break;
|
||||
}
|
||||
|
||||
curp->used = 1;
|
||||
#ifdef DEBUG
|
||||
printf("LKM: LMREADY\n");
|
||||
#endif /* DEBUG */
|
||||
lkm_state = LKMS_IDLE;
|
||||
break;
|
||||
|
||||
case LMUNLOAD: /* unload a module */
|
||||
if ((flag & FWRITE) == 0) /* only allow this if writing */
|
||||
return EPERM;
|
||||
|
||||
unloadp = (struct lmc_unload *)data;
|
||||
|
||||
if ((i = unloadp->id) == -1) { /* unload by name */
|
||||
/*
|
||||
* Copy name and lookup id from all loaded
|
||||
* modules. May fail.
|
||||
*/
|
||||
if (err = copyinstr(unloadp->name, istr, MAXLKMNAME-1, NULL))
|
||||
break;
|
||||
|
||||
/*
|
||||
* look up id...
|
||||
*/
|
||||
for (i = 0; i < MAXLKMS; i++) {
|
||||
if (!lkmods[i].used)
|
||||
continue;
|
||||
if (!strcmp(istr,
|
||||
lkmods[i].private.lkm_any->lkm_name))
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Range check the value; on failure, return EINVAL
|
||||
*/
|
||||
if (i < 0 || i >= MAXLKMS) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
curp = &lkmods[i];
|
||||
|
||||
if (!curp->used) {
|
||||
err = ENOENT;
|
||||
break;
|
||||
}
|
||||
|
||||
/* call entry(unload) */
|
||||
if ((*(curp->entry))(curp, LKM_E_UNLOAD, LKM_VERSION)) {
|
||||
err = EBUSY;
|
||||
break;
|
||||
}
|
||||
|
||||
lkm_state = LKMS_UNLOADING; /* non-idle for lkmunreserve */
|
||||
lkmunreserve(); /* free memory */
|
||||
curp->used = 0; /* free slot */
|
||||
break;
|
||||
|
||||
case LMSTAT: /* stat a module by id/name */
|
||||
/* allow readers and writers to stat */
|
||||
|
||||
statp = (struct lmc_stat *)data;
|
||||
|
||||
if ((i = statp->id) == -1) { /* stat by name */
|
||||
/*
|
||||
* Copy name and lookup id from all loaded
|
||||
* modules.
|
||||
*/
|
||||
copystr(statp->name, istr, MAXLKMNAME-1, NULL);
|
||||
/*
|
||||
* look up id...
|
||||
*/
|
||||
for (i = 0; i < MAXLKMS; i++) {
|
||||
if (!lkmods[i].used)
|
||||
continue;
|
||||
if (!strcmp(istr,
|
||||
lkmods[i].private.lkm_any->lkm_name))
|
||||
break;
|
||||
}
|
||||
|
||||
if (i == MAXLKMS) { /* Not found */
|
||||
err = ENOENT;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Range check the value; on failure, return EINVAL
|
||||
*/
|
||||
if (i < 0 || i >= MAXLKMS) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
curp = &lkmods[i];
|
||||
|
||||
if (!curp->used) { /* Not found */
|
||||
err = ENOENT;
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy out stat information for this module...
|
||||
*/
|
||||
statp->id = curp->id;
|
||||
statp->offset = curp->private.lkm_any->lkm_offset;
|
||||
statp->type = curp->private.lkm_any->lkm_type;
|
||||
statp->area = curp->area;
|
||||
statp->size = curp->size / PAGESIZE;
|
||||
statp->private = (unsigned long)curp->private.lkm_any;
|
||||
statp->ver = curp->private.lkm_any->lkm_ver;
|
||||
copystr(curp->private.lkm_any->lkm_name,
|
||||
statp->name,
|
||||
MAXLKMNAME - 2,
|
||||
NULL);
|
||||
|
||||
break;
|
||||
|
||||
default: /* bad ioctl()... */
|
||||
err = ENOTTY;
|
||||
break;
|
||||
}
|
||||
|
||||
return (err);
|
||||
}
|
||||
|
||||
/*
|
||||
* Acts like "nosys" but can be identified in sysent for dynamic call
|
||||
* number assignment for a limited number of calls.
|
||||
*
|
||||
* Place holder for system call slots reserved for loadable modules.
|
||||
*/
|
||||
int
|
||||
lkmnosys()
|
||||
{
|
||||
|
||||
return(nosys());
|
||||
}
|
||||
|
||||
/*
|
||||
* Acts like "enodev", but can be identified in cdevsw and bdevsw for
|
||||
* dynamic driver major number assignment for a limited number of
|
||||
* drivers.
|
||||
*
|
||||
* Place holder for device switch slots reserved for loadable modules.
|
||||
*/
|
||||
int
|
||||
lkmenodev()
|
||||
{
|
||||
|
||||
return(enodev());
|
||||
}
|
||||
|
||||
int
|
||||
lkmexists(lkmtp)
|
||||
struct lkm_table *lkmtp;
|
||||
{
|
||||
int i;
|
||||
|
||||
/*
|
||||
* see if name exists...
|
||||
*/
|
||||
for (i = 0; i < MAXLKMS; i++) {
|
||||
/*
|
||||
* An unused module and the one we are testing are not
|
||||
* considered.
|
||||
*/
|
||||
if (!lkmods[i].used || &lkmods[i] == lkmtp)
|
||||
continue;
|
||||
if (!strcmp(lkmtp->private.lkm_any->lkm_name,
|
||||
lkmods[i].private.lkm_any->lkm_name))
|
||||
return(1); /* already loaded... */
|
||||
}
|
||||
|
||||
return(0); /* module not loaded... */
|
||||
}
|
||||
|
||||
/*
|
||||
* For the loadable system call described by the structure pointed to
|
||||
* by lkmtp, load/unload/stat it depending on the cmd requested.
|
||||
*/
|
||||
static int
|
||||
_lkm_syscall(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
struct lkm_syscall *args = lkmtp->private.lkm_syscall;
|
||||
int i;
|
||||
int err = 0;
|
||||
extern int nsysent; /* from init_sysent.c */
|
||||
|
||||
switch(cmd) {
|
||||
case LKM_E_LOAD:
|
||||
/* don't load twice! */
|
||||
if (lkmexists(lkmtp))
|
||||
return(EEXIST);
|
||||
if ((i = args->lkm_offset) == -1) { /* auto */
|
||||
/*
|
||||
* Search the table looking for a slot...
|
||||
*/
|
||||
for (i = 0; i < nsysent; i++)
|
||||
if (sysent[i].sy_call == lkmnosys)
|
||||
break; /* found it! */
|
||||
/* out of allocable slots? */
|
||||
if (i == nsysent) {
|
||||
err = ENFILE;
|
||||
break;
|
||||
}
|
||||
} else { /* assign */
|
||||
if (i < 0 || i >= nsysent) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* save old */
|
||||
bcopy(&sysent[i], &(args->lkm_oldent), sizeof(struct sysent));
|
||||
|
||||
/* replace with new */
|
||||
bcopy(args->lkm_sysent, &sysent[i], sizeof(struct sysent));
|
||||
|
||||
/* done! */
|
||||
args->lkm_offset = i; /* slot in sysent[] */
|
||||
|
||||
break;
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
/* current slot... */
|
||||
i = args->lkm_offset;
|
||||
|
||||
/* replace current slot contents with old contents */
|
||||
bcopy(&(args->lkm_oldent), &sysent[i], sizeof(struct sysent));
|
||||
|
||||
break;
|
||||
|
||||
case LKM_E_STAT: /* no special handling... */
|
||||
break;
|
||||
}
|
||||
|
||||
return(err);
|
||||
}
|
||||
|
||||
/*
|
||||
* For the loadable virtual file system described by the structure pointed
|
||||
* to by lkmtp, load/unload/stat it depending on the cmd requested.
|
||||
*/
|
||||
static int
|
||||
_lkm_vfs(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
struct lkm_vfs *args = lkmtp->private.lkm_vfs;
|
||||
int i;
|
||||
int err = 0;
|
||||
|
||||
#if 0
|
||||
switch(cmd) {
|
||||
case LKM_E_LOAD:
|
||||
/* don't load twice! */
|
||||
if (lkmexists(lkmtp))
|
||||
return(EEXIST);
|
||||
|
||||
/* make sure there's no VFS in the table with this name */
|
||||
for (i = 0; i < nvfssw; i++)
|
||||
if (vfssw[i] != (struct vfsops *)0 &&
|
||||
strncmp(vfssw[i]->vfs_name,
|
||||
args->lkm_vfsops->vfs_name, MFSNAMELEN) == 0)
|
||||
return (EEXIST);
|
||||
|
||||
/* pick the last available empty slot */
|
||||
for (i = nvfssw - 1; i >= 0; i--)
|
||||
if (vfssw[i] == (struct vfsops *)0)
|
||||
break;
|
||||
if (i == -1) { /* or if none, punt */
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set up file system
|
||||
*/
|
||||
vfssw[i] = args->lkm_vfsops;
|
||||
|
||||
/*
|
||||
* Call init function for this VFS...
|
||||
*/
|
||||
(*(vfssw[i]->vfs_init))();
|
||||
|
||||
/* done! */
|
||||
args->lkm_offset = i; /* slot in vfssw[] */
|
||||
break;
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
#ifdef notyet
|
||||
/* current slot... */
|
||||
i = args->lkm_offset;
|
||||
|
||||
/* replace current slot contents with old contents */
|
||||
vfssw[i] = (struct vfsops *)0;
|
||||
#else
|
||||
/* it's not safe to remove a vfs */
|
||||
err = EBUSY;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case LKM_E_STAT: /* no special handling... */
|
||||
break;
|
||||
}
|
||||
#else
|
||||
err = EINVAL;
|
||||
#endif
|
||||
return(err);
|
||||
}
|
||||
|
||||
/*
|
||||
* For the loadable device driver described by the structure pointed to
|
||||
* by lkmtp, load/unload/stat it depending on the cmd requested.
|
||||
*/
|
||||
static int
|
||||
_lkm_dev(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
struct lkm_dev *args = lkmtp->private.lkm_dev;
|
||||
int i;
|
||||
int err = 0;
|
||||
extern int nblkdev, nchrdev; /* from conf.c */
|
||||
|
||||
switch(cmd) {
|
||||
case LKM_E_LOAD:
|
||||
/* don't load twice! */
|
||||
if (lkmexists(lkmtp))
|
||||
return(EEXIST);
|
||||
switch(args->lkm_devtype) {
|
||||
case LM_DT_BLOCK:
|
||||
if ((i = args->lkm_offset) == -1) { /* auto */
|
||||
/*
|
||||
* Search the table looking for a slot...
|
||||
*/
|
||||
for (i = 0; i < nblkdev; i++)
|
||||
if (bdevsw[i].d_open == lkmenodev)
|
||||
break; /* found it! */
|
||||
/* out of allocable slots? */
|
||||
if (i == nblkdev) {
|
||||
err = ENFILE;
|
||||
break;
|
||||
}
|
||||
} else { /* assign */
|
||||
if (i < 0 || i >= nblkdev) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* save old */
|
||||
bcopy(&bdevsw[i], &(args->lkm_olddev.bdev), sizeof(struct bdevsw));
|
||||
|
||||
/* replace with new */
|
||||
bcopy(args->lkm_dev.bdev, &bdevsw[i], sizeof(struct bdevsw));
|
||||
|
||||
/* done! */
|
||||
args->lkm_offset = i; /* slot in bdevsw[] */
|
||||
break;
|
||||
|
||||
case LM_DT_CHAR:
|
||||
if ((i = args->lkm_offset) == -1) { /* auto */
|
||||
/*
|
||||
* Search the table looking for a slot...
|
||||
*/
|
||||
for (i = 0; i < nchrdev; i++)
|
||||
if (cdevsw[i].d_open == lkmenodev)
|
||||
break; /* found it! */
|
||||
/* out of allocable slots? */
|
||||
if (i == nchrdev) {
|
||||
err = ENFILE;
|
||||
break;
|
||||
}
|
||||
} else { /* assign */
|
||||
if (i < 0 || i >= nchrdev) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* save old */
|
||||
bcopy(&cdevsw[i], &(args->lkm_olddev.cdev), sizeof(struct cdevsw));
|
||||
|
||||
/* replace with new */
|
||||
bcopy(args->lkm_dev.cdev, &cdevsw[i], sizeof(struct cdevsw));
|
||||
|
||||
/* done! */
|
||||
args->lkm_offset = i; /* slot in cdevsw[] */
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
err = ENODEV;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
/* current slot... */
|
||||
i = args->lkm_offset;
|
||||
|
||||
switch(args->lkm_devtype) {
|
||||
case LM_DT_BLOCK:
|
||||
/* replace current slot contents with old contents */
|
||||
bcopy(&(args->lkm_olddev.bdev), &bdevsw[i], sizeof(struct bdevsw));
|
||||
break;
|
||||
|
||||
case LM_DT_CHAR:
|
||||
/* replace current slot contents with old contents */
|
||||
bcopy(&(args->lkm_olddev.cdev), &cdevsw[i], sizeof(struct cdevsw));
|
||||
break;
|
||||
|
||||
default:
|
||||
err = ENODEV;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case LKM_E_STAT: /* no special handling... */
|
||||
break;
|
||||
}
|
||||
|
||||
return(err);
|
||||
}
|
||||
|
||||
#ifdef STREAMS
|
||||
/*
|
||||
* For the loadable streams module described by the structure pointed to
|
||||
* by lkmtp, load/unload/stat it depending on the cmd requested.
|
||||
*/
|
||||
static int
|
||||
_lkm_strmod(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
struct lkm_strmod *args = lkmtp->private.lkm_strmod;
|
||||
int i;
|
||||
int err = 0;
|
||||
|
||||
switch(cmd) {
|
||||
case LKM_E_LOAD:
|
||||
/* don't load twice! */
|
||||
if (lkmexists(lkmtp))
|
||||
return(EEXIST);
|
||||
break;
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
break;
|
||||
|
||||
case LKM_E_STAT: /* no special handling... */
|
||||
break;
|
||||
}
|
||||
|
||||
return(err);
|
||||
}
|
||||
#endif /* STREAMS */
|
||||
|
||||
/*
|
||||
* For the loadable execution class described by the structure pointed to
|
||||
* by lkmtp, load/unload/stat it depending on the cmd requested.
|
||||
*/
|
||||
static int
|
||||
_lkm_exec(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
struct lkm_exec *args = lkmtp->private.lkm_exec;
|
||||
int i;
|
||||
int err = 0;
|
||||
|
||||
#if 0
|
||||
switch(cmd) {
|
||||
case LKM_E_LOAD:
|
||||
/* don't load twice! */
|
||||
if (lkmexists(lkmtp))
|
||||
return(EEXIST);
|
||||
if ((i = args->lkm_offset) == -1) { /* auto */
|
||||
/*
|
||||
* Search the table looking for a slot...
|
||||
*/
|
||||
for (i = 0; i < nexecs; i++)
|
||||
if (execsw[i].es_check == NULL)
|
||||
break; /* found it! */
|
||||
/* out of allocable slots? */
|
||||
if (i == nexecs) {
|
||||
err = ENFILE;
|
||||
break;
|
||||
}
|
||||
} else { /* assign */
|
||||
if (i < 0 || i >= nexecs) {
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* save old */
|
||||
bcopy(&execsw[i], &(args->lkm_oldexec), sizeof(struct execsw));
|
||||
|
||||
/* replace with new */
|
||||
bcopy(args->lkm_exec, &execsw[i], sizeof(struct execsw));
|
||||
|
||||
/* realize need to recompute max header size */
|
||||
exec_maxhdrsz = 0;
|
||||
|
||||
/* done! */
|
||||
args->lkm_offset = i; /* slot in execsw[] */
|
||||
|
||||
break;
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
/* current slot... */
|
||||
i = args->lkm_offset;
|
||||
|
||||
/* replace current slot contents with old contents */
|
||||
bcopy(&(args->lkm_oldexec), &execsw[i], sizeof(struct execsw));
|
||||
|
||||
/* realize need to recompute max header size */
|
||||
exec_maxhdrsz = 0;
|
||||
|
||||
break;
|
||||
|
||||
case LKM_E_STAT: /* no special handling... */
|
||||
break;
|
||||
}
|
||||
#else
|
||||
err = EINVAL;
|
||||
#endif
|
||||
return(err);
|
||||
}
|
||||
|
||||
/*
|
||||
* This code handles the per-module type "wiring-in" of loadable modules
|
||||
* into existing kernel tables. For "LM_MISC" modules, wiring and unwiring
|
||||
* is assumed to be done in their entry routines internal to the module
|
||||
* itself.
|
||||
*/
|
||||
int
|
||||
lkmdispatch(lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
int err = 0; /* default = success */
|
||||
|
||||
switch(lkmtp->private.lkm_any->lkm_type) {
|
||||
case LM_SYSCALL:
|
||||
err = _lkm_syscall(lkmtp, cmd);
|
||||
break;
|
||||
|
||||
case LM_VFS:
|
||||
err = _lkm_vfs(lkmtp, cmd);
|
||||
break;
|
||||
|
||||
case LM_DEV:
|
||||
err = _lkm_dev(lkmtp, cmd);
|
||||
break;
|
||||
|
||||
#ifdef STREAMS
|
||||
case LM_STRMOD:
|
||||
{
|
||||
struct lkm_strmod *args = lkmtp->private.lkm_strmod;
|
||||
}
|
||||
break;
|
||||
|
||||
#endif /* STREAMS */
|
||||
|
||||
case LM_EXEC:
|
||||
err = _lkm_exec(lkmtp, cmd);
|
||||
break;
|
||||
|
||||
case LM_MISC: /* ignore content -- no "misc-specific" procedure */
|
||||
break;
|
||||
|
||||
default:
|
||||
err = ENXIO; /* unknown type */
|
||||
break;
|
||||
}
|
||||
|
||||
return(err);
|
||||
}
|
||||
@ -1,6 +1,6 @@
|
||||
#! /bin/sh -
|
||||
# @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93
|
||||
# $Id$
|
||||
# $Id: makesyscalls.sh,v 1.2 1994/08/02 07:42:24 davidg Exp $
|
||||
|
||||
set -e
|
||||
|
||||
@ -101,12 +101,13 @@ awk < $1 "
|
||||
if (NF < 5)
|
||||
$5 = $4
|
||||
}
|
||||
$2 == "STD" {
|
||||
$2 == "STD" || $2 == "NODEF" {
|
||||
printf("int\t%s();\n", $4) > sysdcl
|
||||
printf("\t{ %d, %s },\t\t\t/* %d = %s */\n", \
|
||||
$3, $4, syscall, $5) > sysent
|
||||
printf("\t\"%s\",\t\t\t/* %d = %s */\n", \
|
||||
$5, syscall, $5) > sysnames
|
||||
if ($2 == "STD")
|
||||
printf("#define\tSYS_%s\t%d\n", \
|
||||
$5, syscall) > syshdr
|
||||
syscall++
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
* System call names.
|
||||
*
|
||||
* DO NOT EDIT-- this file is automatically generated.
|
||||
* created from @(#)syscalls.master 8.2 (Berkeley) 1/13/94
|
||||
* created from $Id: syscalls.master,v 1.3 1994/08/02 07:42:44 davidg Exp $
|
||||
*/
|
||||
|
||||
char *syscallnames[] = {
|
||||
@ -247,5 +247,27 @@ char *syscallnames[] = {
|
||||
"#207", /* 207 = nosys */
|
||||
"#208", /* 208 = nosys */
|
||||
"#209", /* 209 = nosys */
|
||||
#ifdef LKM
|
||||
"lkmnosys", /* 210 = lkmnosys */
|
||||
"lkmnosys", /* 211 = lkmnosys */
|
||||
"lkmnosys", /* 212 = lkmnosys */
|
||||
"lkmnosys", /* 213 = lkmnosys */
|
||||
"lkmnosys", /* 214 = lkmnosys */
|
||||
"lkmnosys", /* 215 = lkmnosys */
|
||||
"lkmnosys", /* 216 = lkmnosys */
|
||||
"lkmnosys", /* 217 = lkmnosys */
|
||||
"lkmnosys", /* 218 = lkmnosys */
|
||||
"lkmnosys", /* 219 = lkmnosys */
|
||||
#else
|
||||
"#210", /* 210 = nosys */
|
||||
"#211", /* 211 = nosys */
|
||||
"#212", /* 212 = nosys */
|
||||
"#213", /* 213 = nosys */
|
||||
"#214", /* 214 = nosys */
|
||||
"#215", /* 215 = nosys */
|
||||
"#216", /* 216 = nosys */
|
||||
"#217", /* 217 = nosys */
|
||||
"#218", /* 218 = nosys */
|
||||
"#219", /* 219 = nosys */
|
||||
#endif
|
||||
};
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
$Id$
|
||||
$Id: syscalls.master,v 1.3 1994/08/02 07:42:44 davidg Exp $
|
||||
; from: @(#)syscalls.master 8.2 (Berkeley) 1/13/94
|
||||
;
|
||||
; System call name/number master file.
|
||||
@ -275,4 +275,30 @@
|
||||
207 UNIMPL 0 nosys
|
||||
208 UNIMPL 0 nosys
|
||||
209 UNIMPL 0 nosys
|
||||
|
||||
;
|
||||
; The following are reserved for loadable syscalls
|
||||
;
|
||||
#ifdef LKM
|
||||
210 NODEF 0 lkmnosys
|
||||
211 NODEF 0 lkmnosys
|
||||
212 NODEF 0 lkmnosys
|
||||
213 NODEF 0 lkmnosys
|
||||
214 NODEF 0 lkmnosys
|
||||
215 NODEF 0 lkmnosys
|
||||
216 NODEF 0 lkmnosys
|
||||
217 NODEF 0 lkmnosys
|
||||
218 NODEF 0 lkmnosys
|
||||
219 NODEF 0 lkmnosys
|
||||
#else
|
||||
210 UNIMPL 0 nosys
|
||||
211 UNIMPL 0 nosys
|
||||
212 UNIMPL 0 nosys
|
||||
213 UNIMPL 0 nosys
|
||||
214 UNIMPL 0 nosys
|
||||
215 UNIMPL 0 nosys
|
||||
216 UNIMPL 0 nosys
|
||||
217 UNIMPL 0 nosys
|
||||
218 UNIMPL 0 nosys
|
||||
219 UNIMPL 0 nosys
|
||||
#endif
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)exec.h 8.3 (Berkeley) 1/21/94
|
||||
* $Id$
|
||||
* $Id: exec.h,v 1.3 1994/08/02 07:52:55 davidg Exp $
|
||||
*/
|
||||
|
||||
#include <machine/exec.h>
|
||||
@ -70,3 +70,16 @@ struct execve_args {
|
||||
char **argv;
|
||||
char **envv;
|
||||
};
|
||||
|
||||
struct execsw {
|
||||
int (*ex_imgact)(void * /* struct image_params * */);
|
||||
const char *ex_name;
|
||||
};
|
||||
|
||||
#ifdef KERNEL
|
||||
extern const struct execsw **execsw;
|
||||
|
||||
extern int exec_extract_strings(void * /* struct image_params * */);
|
||||
extern int exec_new_vmspace(void * /* struct image_params * */);
|
||||
#endif
|
||||
|
||||
|
||||
@ -30,7 +30,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: imgact.h,v 1.4 1994/08/13 03:50:34 wollman Exp $
|
||||
* $Id: imgact.h,v 1.5 1994/08/18 22:35:43 wollman Exp $
|
||||
*/
|
||||
|
||||
#ifndef __h_imgact
|
||||
@ -56,16 +56,4 @@ struct image_params {
|
||||
char interpreter_name[64]; /* name of the interpreter */
|
||||
};
|
||||
|
||||
struct execsw {
|
||||
int (*ex_imgact)(struct image_params *);
|
||||
const char *ex_name;
|
||||
};
|
||||
|
||||
#ifdef KERNEL
|
||||
extern const struct execsw **execsw;
|
||||
|
||||
extern int exec_extract_strings(struct image_params *);
|
||||
extern int exec_new_vmspace(struct image_params *);
|
||||
#endif
|
||||
|
||||
#endif /* __h_imgact */
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
* System call numbers.
|
||||
*
|
||||
* DO NOT EDIT-- this file is automatically generated.
|
||||
* created from @(#)syscalls.master 8.2 (Berkeley) 1/13/94
|
||||
* created from $Id: syscalls.master,v 1.3 1994/08/02 07:42:44 davidg Exp $
|
||||
*/
|
||||
|
||||
#define SYS_syscall 0
|
||||
|
||||
Loading…
Reference in New Issue
Block a user