pr_set_mm_env_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>\n  /* Definition of \nPR_*\n constants */
\n#include <sys/prctl.h>

int prctl(PR_SET_MM, PR_SET_MM_ARG_START, unsigned long \naddr\n, 0L, 0L);\n
\nint prctl(PR_SET_MM, PR_SET_MM_ARG_END, unsigned long \naddr\n, 0L, 0L);\n
\nint prctl(PR_SET_MM, PR_SET_MM_ENV_START, unsigned long \naddr\n, 0L, 0L);\n
\nint prctl(PR_SET_MM, PR_SET_MM_ENV_END, unsigned long \naddr\n, 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.

SEE ALSO#

prctl(2), PR_SET_MM(2const)