PHYS(2) System Calls Manual PHYS(2)NAME
phys - allow a process to access physical addresses (2BSD)
SYNOPSIS
phys(segreg, size, physaddr)
unsigned int segreg, size, physaddr;
DESCRIPTION
The argument segreg specifies a process virtual (data-space) address range of 8K bytes starting at virtual address segregx8K bytes. This
address range is mapped into physical address physaddrx64 bytes. Only the first sizex64 bytes of this mapping is addressable. If size is
zero, any previous mapping of this virtual address range is nullified. For example, the call
phys(7, 1, 0177775);
will map virtual addresses 0160000-0160077 into physical addresses 017777500-017777577. In particular, virtual address 0160060 is the
PDP-11 console located at physical address 017777560.
This call may only be executed by the super-user.
ERRORS
[EPERM] The process's effective user ID is not the super-user.
[EINVAL] Segreg is less than 0 or greater than 7.
[EINVAL] Size is less than 0 or greater than 128.
SEE ALSO
PDP-11 segmentation hardware
BUGS
On systems with ENABLE/34(tm) memory mapping boards, phys cannot be used to map in the I/O page.
This system call is very dangerous. It is not considered a permanent part of the system.
Phys is unique to the PDP-11 and 2BSD; its use is discouraged.
3rd Berkeley Distribution January 22, 1987 PHYS(2)
Check Out this Related Man Page
MEM(4) Kernel Interfaces Manual MEM(4)NAME
mem, kmem - main memory
SYNOPSIS
major device number(s):
raw: 1
minor device encoding:
mem: 0; kmem: 1; null: 2
DESCRIPTION
Mem is a special file that is an image of the main memory of the computer. It may be used, for example, to examine (and even to patch) the
system.
Byte addresses in mem are interpreted as physical memory addresses. References to non-existent locations cause errors to be returned.
The file kmem is the same as mem except that kernel virtual memory rather than physical memory is accessed. Only kernel virtual addresses
that are mapped to memory are allowed. Examining and patching device registers is likely to lead to unexpected results when read-only or
write-only bits are present.
On PDP-11s, the I/O page begins at location 0160000 of kmem and the per-process data segment for the current process begins at 0140000 and
is USIZE clicks (64 bytes each) long.
FILES
/dev/mem
/dev/kmem
/dev/MAKEDEV script to create special files
/dev/MAKEDEV.local script to localize special files
BUGS
On PDP-11's, specifying an odd kernel or user address, or an odd transfer count is [generally] slower than using all even parameters.
On machines with ENABLE/34(tm) memory mapping boards the I/O page can be accessed only through kmem.
3rd Berkeley Distribution January 28, 1988 MEM(4)
i am running solaris 9 i now how to create virtual ip address but how do i keep them so when the server reboots they are still there?...THANX (2 Replies)
Hi all,
Even after reading many explanation the question still haunting me what's the difference between physical and linear addresses.Can we directly access physical addresses .If not then paging circuitry would have ensure contiguous physical addresses regardless of any linear addresses but this... (2 Replies)
I'm looking for a way in RHL 5.1 to use two NICs on one host with two physical IP addresses and map them under one virtual IP address, i.e. NIC 1 10.10.10.1 NIC2 10.10.10.2 VIP 192.168.10.1
Basically I want either one of the NICs to ARP for the VIP. No load balancing required just HA. (2 Replies)
Hi,
I am looking to work on unix systems which include (hp-ux, ibm aix, solaris and linux). I want to get the total virtual address space of a process, the used virtual memory i am able to get without any problem. I have tried using getrlimit and getrlimit64, but that gives only ... (4 Replies)
I am trying to generate a report with below file :
File1 :
EQADM,edrtere9-phys,8122caef0,gpatmon,/bin/ksh,nuten Erick
EQADM,edrtere11-phys,8227caef0,gpatmon,/bin/ksh,nuten Erick
EQADM,edrtere3-phys,822caef0,gpatmon,/bin/ksh,nuten Erick
can you help me convert it to html and add... (9 Replies)
Hello,
I do not know Linux. It is a black box.
We have 2 virtuals servers (SAPVM01 and SAPVM06) in one physical server.
The first virtual system (SAPVM01) has a total size of 420 Gb and a free space of 170 GB. A SAP system is running.
The second virtual system (SAPVM06) has a total... (3 Replies)
Hi guys,
I got one problem which I definetily no idea.
What would the physical address be for virtual address?
1) 2ABC
2) 3F4B
Here is the page table:see attached
Thank you sos sososososso much!! (0 Replies)
We know for every process, it has 4G virtual memory on a 32bit machine.
since virtual memory is not physical memory, why don't operating system allocate all it's virtual memory to it, but set a "program break" to limit it's heap space?
Even if the operating system allocate all the 4G virtual... (6 Replies)
Hi
I am looking to automate the process in PERL of allocating IP addresses from a set range of addresses (for example a /22 network 10.10.224.1 - 10.10.227.254)
I am able to query the IP addresses that are already in use in the above range, which will produce me a list like this for example... (3 Replies)
Have 2 nics on physical system
net0 phys 1500 up --
net1 phys 1500 up --
1. I want to create a link aggregation with LACP enabled with above 2 nics
2. Create port-group(Like we create on ESXi) with VLAN-ID 2141
3. And assign this... (0 Replies)
In the process of restoring a few DEC PDP-11/34's (34a, and 34). Curious what BSD versions will run on the 34 (if any).
It looks like 1BSD or 2BSD might run on it, but not sure. Curious if anyone knows, or has done this. (1 Reply)
Hello Guys,
Can some help me with a configuration from 2x10g cards to 4 Ldoms and a Vlan configuration,
Solaris 11
dladm show-phys
LINK MEDIA STATE SPEED DUPLEX DEVICE
net0 Ethernet up 1000 full ixgbe0
net1 Ethernet ... (2 Replies)