313 lines
7.2 KiB
C
313 lines
7.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 1999 Assar Westerlund
|
|
* 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/param.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/malloc.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
|
|
|
|
MALLOC_DEFINE(M_CONTIGMEM, "contigmem", "contigmem(4) allocations");
|
|
|
|
// struct syscall_hello {
|
|
// unsigned long size;
|
|
// };
|
|
|
|
struct syscall_alloc {
|
|
int size;
|
|
int malloc;
|
|
// int *newSize;
|
|
// void *addr;
|
|
};
|
|
|
|
// syscall for allocating contigous memory.
|
|
static int
|
|
Alloc(struct thread *td, struct syscall_alloc *uap)
|
|
{
|
|
|
|
// struct syscall_alloc *uap;
|
|
// uap = (struct syscall_alloc *)arg;
|
|
|
|
struct syscall_alloc state_copy;
|
|
|
|
state_copy = *uap;
|
|
|
|
int uap_size = 4;
|
|
// int malloc = uap->malloc;
|
|
|
|
printf("size %d \n", state_copy.size);
|
|
|
|
// printf("malloc tried 1 %d \n",*uap->malloc);
|
|
|
|
if(state_copymalloc == 1) {
|
|
// Calculate next power of 2
|
|
|
|
printf("Malloc called \n");
|
|
|
|
int alignment = 1;
|
|
|
|
// 2 refers to the size
|
|
while ( alignment <= uap_size) {
|
|
alignment = alignment << 1 ;
|
|
}
|
|
|
|
// uap->size = 3;
|
|
|
|
// td->td_retval[0] = uap;
|
|
|
|
|
|
// printf("Changing size \n");
|
|
|
|
state_copy.size = 10;
|
|
|
|
*uap = state_copy;
|
|
|
|
// *arg = uap;
|
|
|
|
printf("alignment %d \n", alignment);
|
|
|
|
// To call contig alloc and free based on
|
|
// hardcoded physical allocations and adding
|
|
// doing array allocations and frees.
|
|
// void *addr;
|
|
|
|
// int alignmentInt;
|
|
// // alignmentInt = nextPowerOf2(2);
|
|
// unsigned long alignment = ( unsigned long ) alignmentInt ;
|
|
|
|
// addr = contigmalloc(uap_size, M_CONTIGMEM, M_ZERO,
|
|
// 0, BUS_SPACE_MAXADDR, alignment, 0);
|
|
|
|
// uap->addr = addr;
|
|
|
|
// printf("Malloc complete");
|
|
|
|
// to write address to /proc and to read allocated address from /proc
|
|
|
|
return (4);
|
|
|
|
} else {
|
|
|
|
// printf("Free called complete");
|
|
|
|
// contigfree(uap->addr,uap->size, M_CONTIGMEM);
|
|
|
|
// printf("Free complete");
|
|
}
|
|
|
|
|
|
|
|
|
|
return (0);
|
|
}
|
|
|
|
// // syscall for allocating contigous memory.
|
|
// static int
|
|
// Free(struct thread *td, void *arg)
|
|
// {
|
|
|
|
// struct syscall_alloc *uap;
|
|
// uap = (struct syscall_alloc *)arg;
|
|
|
|
// unsigned long uap_size = uap->size;
|
|
|
|
// printf("free size %lu \n", uap_size);
|
|
|
|
|
|
// // // Calculate next power of 2
|
|
|
|
// // unsigned long alignment = 1;
|
|
|
|
// // // 2 refers to the size
|
|
// // while ( alignment <= uap_size) {
|
|
// // alignment = alignment << 1 ;
|
|
// // }
|
|
|
|
// // printf("alignment %lu \n", alignment);
|
|
|
|
// // // To call contig alloc and free based on
|
|
// // // hardcoded physical allocations and adding
|
|
// // // doing array allocations and frees.
|
|
// // void *addr;
|
|
|
|
// // int alignmentInt;
|
|
// // // alignmentInt = nextPowerOf2(2);
|
|
// // unsigned long alignment = ( unsigned long ) alignmentInt ;
|
|
|
|
// contigfree(uap->addr,uap->size, M_CONTIGMEM);
|
|
|
|
// // addr = contigmalloc(uap_size, M_CONTIGMEM, M_ZERO,
|
|
// // 0, BUS_SPACE_MAXADDR, alignment, 0);
|
|
|
|
// // int *addr1;
|
|
// // addr1 = contigmalloc(2, M_CONTIGMEM, M_ZERO,
|
|
// // 0, BUS_SPACE_MAXADDR, alignment, 0);
|
|
|
|
// // uap->addr = addr;
|
|
|
|
// // addr1[0] = 2;
|
|
|
|
// // printf("address 0 %i \n", addr[0]);
|
|
// // printf("address 0 %i \n", addr1[0]);
|
|
|
|
// // contigfree(addr,2, M_CONTIGMEM);
|
|
// // contigfree(addr1,2, M_CONTIGMEM);
|
|
|
|
// // printf("contigfree complete");
|
|
|
|
// // printf("hello kernel 1\n");
|
|
|
|
// // printf("hello kernel\n");
|
|
// return (0);
|
|
// }
|
|
// define custom args.
|
|
/*
|
|
* The function for implementing the syscall.
|
|
*/
|
|
// static int
|
|
// hello(struct thread *td, void *arg)
|
|
// {
|
|
|
|
// struct syscall_hello *uap;
|
|
// uap = (struct syscall_hello *)arg;
|
|
|
|
// unsigned long uap_size = uap->size;
|
|
|
|
// printf("size %lu \n", uap_size);
|
|
|
|
|
|
// // Calculate next power of 2
|
|
|
|
// unsigned long alignment = 1;
|
|
|
|
// // 2 refers to the size
|
|
// while ( alignment <= 2) {
|
|
// alignment = alignment << 1 ;
|
|
// }
|
|
|
|
// printf("alignment %lu \n", alignment);
|
|
|
|
// // To call contig alloc and free based on
|
|
// // hardcoded physical allocations and adding
|
|
// // doing array allocations and frees.
|
|
// int *addr;
|
|
|
|
// // int alignmentInt;
|
|
// // // alignmentInt = nextPowerOf2(2);
|
|
// // unsigned long alignment = ( unsigned long ) alignmentInt ;
|
|
|
|
// addr = contigmalloc(2, M_CONTIGMEM, M_ZERO,
|
|
// 0, BUS_SPACE_MAXADDR, alignment, 0);
|
|
|
|
// addr[0] = 1;
|
|
|
|
// int *addr1;
|
|
// addr1 = contigmalloc(2, M_CONTIGMEM, M_ZERO,
|
|
// 0, BUS_SPACE_MAXADDR, alignment, 0);
|
|
|
|
// addr1[0] = 2;
|
|
|
|
// printf("address 0 %i \n", addr[0]);
|
|
// printf("address 0 %i \n", addr1[0]);
|
|
|
|
// contigfree(addr,2, M_CONTIGMEM);
|
|
// contigfree(addr1,2, M_CONTIGMEM);
|
|
|
|
// printf("contigfree complete");
|
|
|
|
// printf("hello kernel 1\n");
|
|
|
|
// printf("hello kernel\n");
|
|
// return (0);
|
|
// }
|
|
|
|
// calculate next power of 2
|
|
// int nextPowerOf2 (unsigned int x) {
|
|
// int value = 1;
|
|
|
|
// while ( value <= x) {
|
|
// value = value << 1 ;
|
|
// }
|
|
|
|
// return value;
|
|
// }
|
|
|
|
/*
|
|
* The `sysent' for the new syscall
|
|
*/
|
|
static struct sysent Malloc_sysent = {
|
|
.sy_narg = 1,
|
|
.sy_call = (sy_call_t*)Alloc
|
|
};
|
|
|
|
// static struct sysent Free_sysent = {
|
|
// .sy_narg = 0,
|
|
// .sy_call = Free
|
|
// };
|
|
|
|
/*
|
|
* The offset in sysent where the syscall is allocated.
|
|
*/
|
|
static int Mallocoffset = NO_SYSCALL;
|
|
// static int Freeoffset = NO_SYSCALL;
|
|
|
|
/*
|
|
* The function called at load/unload.
|
|
*/
|
|
static int
|
|
load(struct module *module, int cmd, void *arg)
|
|
{
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
case MOD_LOAD :
|
|
printf("Malloc syscall loaded at %d\n", Mallocoffset);
|
|
// printf("Free syscall loaded at %d\n", Freeoffset);
|
|
break;
|
|
case MOD_UNLOAD :
|
|
printf("Malloc syscall unloaded from %d\n", Mallocoffset);
|
|
// printf("Free syscall unloaded from %d\n", Freeoffset);
|
|
break;
|
|
default :
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCALL_MODULE(syscall, &Mallocoffset, &Malloc_sysent, load, NULL);
|
|
// SYSCALL_MODULE(syscall, &Freeoffset, &Free_sysent, load, NULL);
|