/prog/ - What lang is this?

Name: Anonymous 2011-10-23 4:01



#define REMOVE_FROM_ZONE(zone, ret, type)                   \

MACRO_BEGIN                                 \

    (ret) = (type) (zone)->free_elements;                   \

    if ((ret) != (type) 0) {                        \

        if (check_freed_element) {                  \

            if (!is_kernel_data_addr(((vm_offset_t *)(ret))[0]) ||  \

                ((zone)->elem_size >= (2 * sizeof(vm_offset_t)) &&  \

                ((vm_offset_t *)(ret))[((zone)->elem_size/sizeof(vm_offset_t))-1] != \

                ((vm_offset_t *)(ret))[0]))             \

                panic("a freed zone element has been modified");\

            if (zfree_clear) {                  \

                unsigned int ii;                \

                for (ii = sizeof(vm_offset_t) / sizeof(uint32_t); \

                     ii < zone->elem_size/sizeof(uint32_t) - sizeof(vm_offset_t) / sizeof(uint32_t); \

                     ii++)                  \

                    if (((uint32_t *)(ret))[ii] != (uint32_t)0xdeadbeef) \

                        panic("a freed zone element has been modified");\

            }                           \

        }                               \

        (zone)->count++;                        \

        (zone)->free_elements = *((vm_offset_t *)(ret));        \

    }                                   \

MACRO_END

I think its python, not sure. Ignore all the random \

Name: Anonymous 2011-10-23 4:08

One word C thread over.

Name: Anonymous 2011-10-23 4:13

A bit of Googling reveals, this is a listing from a book called "A Guide to Kernel Exploitation: Attacking the Core". Wannabe-hacker?

Name: Anonymous 2011-10-23 4:30

>>3
right you are, thats what its from.
And no im not a wannabe. Its just an interesting read.

Name: Anonymous 2011-10-23 4:50

>Attacking the Core
F0r m4ssive DMG

Name: Anonymous 2011-10-23 6:11

>sizeof(uint32_t)
>0xdeadbeef
Enterprise Cee

Name: Anonymous 2011-10-23 6:52

I saw "zone" and thought you found this in BIND or some other DNS-related software.

Name: Anonymous 2011-10-23 7:21

>>7
Its from this:
http://www.opensource.apple.com/source/xnu/xnu-1456.1.26/osfmk/kern/zalloc.c

Name: Anonymous 2011-10-23 10:40

C + C macros.

Name: Anonymous 2011-10-23 12:05

File: kern/zalloc.c
* Author: Avadis Tevanian, Jr.
*
* Zone-based memory allocator. A zone is a collection of fixed size
* data blocks for which quick allocation/deallocation is possible.

Name: FrozenVoid 2011-10-23 12:14

>>10
>fixed size data blocks
I call them arrays and i don't see any need for expensive malloc calls to manage them.

What lang is this?

1 Name: Anonymous 2011-10-23 4:01

2 Name: Anonymous 2011-10-23 4:08

3 Name: Anonymous 2011-10-23 4:13

4 Name: Anonymous 2011-10-23 4:30

5 Name: Anonymous 2011-10-23 4:50

6 Name: Anonymous 2011-10-23 6:11

7 Name: Anonymous 2011-10-23 6:52

8 Name: Anonymous 2011-10-23 7:21

9 Name: Anonymous 2011-10-23 10:40

10 Name: Anonymous 2011-10-23 12:05

11 Name: FrozenVoid 2011-10-23 12:14