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Changes to new sysent structure. TODO MOD_EXEC support.

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Søren Schmidt 1994-08-26 08:42:07 +00:00
parent 9f99fb8402
commit 75c34c34d6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=2292
1 changed files with 17 additions and 12 deletions
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29
sys/kern/kern_lkm.c
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@ -1,8 +1,6 @@
/* $NetBSD: kern_lkm.c,v 1.18 1994/06/29 06:32:31 cgd Exp $ */
/*
* Copyright (c) 1994 Christopher G. Demetriou
/*-
* Copyright (c) 1992 Terrence R. Lambert.
* Copyright (c) 1994 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -51,6 +49,7 @@
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/sysent.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/lkm.h>
@ -493,7 +492,7 @@ _lkm_syscall(lkmtp, cmd)
struct lkm_syscall *args = lkmtp->private.lkm_syscall;
int i;
int err = 0;
extern int nsysent; /* from init_sysent.c */
extern struct sysentvec aout_sysvec;
switch(cmd) {
case LKM_E_LOAD:
@ -504,26 +503,30 @@ _lkm_syscall(lkmtp, cmd)
/*
* Search the table looking for a slot...
*/
for (i = 0; i < nsysent; i++)
if (sysent[i].sy_call == lkmnosys)
for (i = 0; i < aout_sysvec.sv_size; i++)
if (aout_sysvec.sv_table[i].sy_call == lkmnosys)
break; /* found it! */
/* out of allocable slots? */
if (i == nsysent) {
if (i == aout_sysvec.sv_size) {
err = ENFILE;
break;
}
} else { /* assign */
if (i < 0 || i >= nsysent) {
if (i < 0 || i >= aout_sysvec.sv_size) {
err = EINVAL;
break;
}
}
/* save old */
bcopy(&sysent[i], &(args->lkm_oldent), sizeof(struct sysent));
bcopy(&aout_sysvec.sv_table[i],
&(args->lkm_oldent),
sizeof(struct sysent));
/* replace with new */
bcopy(args->lkm_sysent, &sysent[i], sizeof(struct sysent));
bcopy(args->lkm_sysent,
&aout_sysvec.sv_table[i],
sizeof(struct sysent));
/* done! */
args->lkm_offset = i; /* slot in sysent[] */
@ -535,7 +538,9 @@ _lkm_syscall(lkmtp, cmd)
i = args->lkm_offset;
/* replace current slot contents with old contents */
bcopy(&(args->lkm_oldent), &sysent[i], sizeof(struct sysent));
bcopy(&(args->lkm_oldent),
&aout_sysvec.sv_table[i],
sizeof(struct sysent));
break;