PR_SET_MM_ARG_START(2const)

NAME

PR_SET_MM_ARG_START, PR_SET_MM_ARG_END, PR_SET_MM_ENV_START, PR_SET_MM_ENV_END - modify kernel memory map descriptor fields

LIBRARY

Standard C library (libc, -lc)

SYNOPSIS

#include <linux/prctl.h>  /* Definition of PR_* constants */
#include <sys/prctl.h>

int prctl(PR_SET_MM, PR_SET_MM_ARG_START, unsigned long addr, 0L, 0L);
int prctl(PR_SET_MM, PR_SET_MM_ARG_END, unsigned long addr, 0L, 0L);
int prctl(PR_SET_MM, PR_SET_MM_ENV_START, unsigned long addr, 0L, 0L);
int prctl(PR_SET_MM, PR_SET_MM_ENV_END, unsigned long addr, 0L, 0L);

DESCRIPTION

PR_SET_MM_ARG_START: Set the address above which the program command line is placed.
PR_SET_MM_ARG_END: Set the address below which the program command line is placed.
PR_SET_MM_ENV_START: Set the address above which the program environment is placed.
PR_SET_MM_ENV_END: Set the address below which the program environment is placed.

The address passed with these calls should belong to a process stack area. Thus, the corresponding memory area must be readable, writable, and (depending on the kernel configuration) have the MAP_GROWSDOWN attribute set (see mmap(2)).

RETURN VALUE

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

ERRORS

EINVAL: addr is greater than TASK_SIZE (the limit on the size of the user address space for this architecture).

STANDARDS

Linux.

HISTORY

Linux 3.5.