/prog/ - a few pointers

Name: Anonymous 2011-05-29 17:48

what's at the 0 memory address

Name: Anonymous 2011-05-29 17:56

NO EXCEPTIONS!

Name: Anonymous 2011-05-29 17:59

Does anyone know a code to automatically stop at a frame in flash I'm using AS2

Name: Anonymous 2011-05-29 18:01

>>1
Depends on OS and processor. On modern OSes on x86, address 0 is reserved and trying to access it would net you a segmentation fault or access violation.

Name: Anonymous 2011-05-29 18:04

interrupt

Name: Anonymous 2011-05-29 18:05

ahndles

Name: Anonymous 2011-05-29 18:09

Boot vector

Name: Anonymous 2011-05-29 18:20

the interrupt vector table at startup on x86

though from the POV of a user space process on a modern operating system, a non-present page will be mapped there in order to trap null pointer derefs

Name: Anonymous 2011-05-29 18:25

ISN'T IT A BUNCH OF SHIT THAT THE BITCHES THAT ARCHITECT THIS SHIT WON'T LET YOU USE ADDRESS 0. WHAT IS THIS?? AUSCHWITZ!!?!?!1FUCK1!

Name: Anonymous 2011-05-29 18:37

what happens if you read a word-sized quantity at 0xffffffff on x86-32

Name: Anonymous 2011-05-29 20:02

>>10
Page-fault.

Name: Anonymous 2011-05-29 20:09

>>1
JEWS!

>>10
Wrap around

Name: Anonymous 2011-05-29 20:19

>>10
That reminds me of http://download.intel.com/design/mobile/SPECUPDT/30922214.pdf - see AE2 on page 19.

Name: Anonymous 2011-05-29 21:11

>>13
Holy shit. No wonder mission-critical applications use outdated, but thoroughly known CPUs.

Name: Anonymous 2011-05-30 2:09

http://www.codeproject.com/KB/system/soviet_kernel_hack.aspx

Name: Anonymous 2011-05-30 3:09

>>10
That depends on what CPU you're using. On AMD, you double fault, in Intel you wrap around. That was one of the bugs in the security system of the original Xbox (they originally designed the system for AMD, switched to Intel late before release and didn't realize there was a difference).

a few pointers

1 Name: Anonymous 2011-05-29 17:48

2 Name: Anonymous 2011-05-29 17:56

3 Name: Anonymous 2011-05-29 17:59

4 Name: Anonymous 2011-05-29 18:01

5 Name: Anonymous 2011-05-29 18:04

6 Name: Anonymous 2011-05-29 18:05

7 Name: Anonymous 2011-05-29 18:09

8 Name: Anonymous 2011-05-29 18:20

9 Name: Anonymous 2011-05-29 18:25

10 Name: Anonymous 2011-05-29 18:37

11 Name: Anonymous 2011-05-29 20:02

12 Name: Anonymous 2011-05-29 20:09

13 Name: Anonymous 2011-05-29 20:19

14 Name: Anonymous 2011-05-29 21:11

15 Name: Anonymous 2011-05-30 2:09

16 Name: Anonymous 2011-05-30 3:09