PR_SET_MM_START_DATA, PR_SET_MM_END_DATA - modify kernel memory map descriptor fields

PR_SET_MM_START_DATA Set the address above which initialized and uninitialized (bss) data are placed. The corresponding memory area must be readable and writable, but not executable or shareable. PR_SET_MM_END_DATA Set the address below which initialized and uninitialized (bss) data are placed. The corresponding memory area must be readable and writable, but not executable or shareable.

EINVALaddr is greater than TASK_SIZE (the limit on the size of the user address space for this architecture). EINVAL The permissions of the corresponding memory area are not as required.

Linux 3.3.

Standard C library (libc, -lc)

PR_SET_MM_START_DATA, PR_SET_MM_END_DATA - modify kernel memory map descriptor fields

On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.

prctl(2) Linux man-pages 6.9.1 2024-06-01 PR_SET_MM_START_DATA(2const)

Linux.

#include<linux/prctl.h> /* Definition of PR_* constants */ #include<sys/prctl.h>intprctl(PR_SET_MM,PR_SET_MM_START_DATA,unsignedlongaddr,0L,0L);intprctl(PR_SET_MM,PR_SET_MM_END_DATA,unsignedlongaddr,0L,0L);