Hi All
I have a structure pointer and setting that pointer as NULL. When i tried to access the elements in the structure i am getting the error message.
"Cannot access memory at address 0x8". This i tried in LINUX.
When the same program is tried thro UNIX (HP-UX), i am not getting the message instead the null value "\0" is printed.
Can any of you tell me why it is so and if possible what is the necessary action that needs to be taken in LInux to avoid that error message.
I have the following program
I have a need to allow only certain IP addresses to access a machine running solaris 9. I am not sure how this can be accomplished.
Thanks in advance for your help.
Patch (2 Replies)
Hi, I try to marshal a unsigned int and a char * into a buffer, and then unmarshal them later to get them out. I need to put the char * in the front and unsigned int at the end of the buffer. However, my system always give me "BUS ERROR". I am using Sun Sparcs Sloris 2.10.
My code to marshal... (6 Replies)
Hi,
The following error message occured when I was trying to reboot my SUN machine:
Memory address not aligned
Its a Sun 280 R , Ultra SPARC III
What should I do.
Varma (3 Replies)
Hi All
i need to use RSH ( i can hear you all banging your head against a wall ) but i want to block a certain IP address from access my machine via RSH, is there way to do this
thanks
A (3 Replies)
HI,
I'm doing a research on client/server connection. I need to run the server code to open socket connection with the client code. To make the test real, I need to run the server code from a a machine far away from the client over the Internet. IN ORDER TO RUN THE CODE, the client has to know the... (3 Replies)
We want to disable graphical logins on our Solaris 10(64bit sparc )boxes, but I haven't found any information on how to do it via google. Most likely I am using the wrong search terms (i've been looking for "xdmcp" and "x11" "disable") .
While looking through the output of "svcs -a | grep... (3 Replies)
Hello Everyone,
We plan to restrict all RSS news feed access soon based on IP address. This means that if you have a website or application that using our site RSS feeds, you can still do it; but your must register you site in this thread.
So please reply with your IP address of your server... (7 Replies)
Discussion started by: Neo
7 Replies
9. Post Here to Contact Site Administrators and Moderators
Hello Everyone,
We now (only) permit access to our RSS news feed access based on IP address. This means that if you have a website or application that using our site RSS feeds, you can still do it; but your must register you site in this thread.
So please reply with your IP address of your... (9 Replies)
How would I write a value to a physical memory address?
I was able to read a physical memory address (for example, 0x400) using this line:
dd if=/dev/mem count=4 bs=1 skip=$(( 0x400 ))
But I get an error:
dd: 'standard input': cannot skip to specified offset
when I try to write using... (1 Reply)
Discussion started by: rabrandt
1 Replies
LEARN ABOUT OPENSOLARIS
mem
mem(7D) Devices mem(7D)NAME
mem, kmem, allkmem - physical or virtual memory access
SYNOPSIS
/dev/mem
/dev/kmem
/dev/allkmem
DESCRIPTION
The file /dev/mem is a special file that provides access to the physical memory of the computer.
The file /dev/kmem is a special file that provides access to the virtual address space of the operating system kernel, excluding memory
that is associated with an I/O device.
The file /dev/allkmem is a special file that provides access to the virtual address space of the operating system kernel, including memory
that is associated with an I/O device. You can use any of these devices to examine and modify the system.
Byte addresses in /dev/mem are interpreted as physical memory addresses. Byte addresses in /dev/kmem and /dev/allkmem are interpreted as
kernel virtual memory addresses. A reference to a non-existent location returns an error. See ERRORS for more information.
The file /dev/mem accesses physical memory; the size of the file is equal to the amount of physical memory in the computer. This size may
be larger than 4GB on a system running the 32-bit operating environment. In this case, you can access memory beyond 4GB using a series of
read(2) and write(2) calls, a pread64() or pwrite64() call, or a combination of llseek(2) and read(2) or write(2).
ERRORS
EFAULT Occurs when trying to write(2) a read-only location (allkmem), read(2) a write-only location (allkmem), or read(2) or write(2) a
non-existent or unimplemented location (mem, kmem, allkmem).
EIO Occurs when trying to read(2) or write(2) a memory location that is associated with an I/O device using the /dev/kmem special
file.
ENXIO Results from attempting to mmap(2) a non-existent physical (mem) or virtual (kmem, allkmem) memory address.
FILES
/dev/mem Provides access to the computer's physical memory.
/dev/kmem Provides access to the virtual address space of the operating system kernel, excluding memory that is associated with an
I/O device.
/dev/allkmem Provides access to the virtual address space of the operating system kernel, including memory that is associated with an
I/O device.
SEE ALSO llseek(2), mmap(2), read(2), write(2)WARNINGS
Using these devices to modify (that is, write to) the address space of a live running operating system or to modify the state of a
hardware device is extremely dangerous and may result in a system panic if kernel data structures are damaged or if device state is
changed.
SunOS 5.11 18 Feb 2002 mem(7D)