PR_SET_MM - modify kernel memory map descriptor fields

Modify certain kernel memory map descriptor fields of the calling process. Usually these fields are set by the kernel and dynamic loader (see ld.so(8) for more information) and a regular application should not use this feature. However, there are cases, such as self-modifying programs, where a program might find it useful to change its own memory map. The calling process must have the CAP_SYS_RESOURCE capability. The value in op is one of the options below. PR_SET_MM_START_CODEPR_SET_MM_END_CODEPR_SET_MM_START_DATAPR_SET_MM_END_DATAPR_SET_MM_START_STACKPR_SET_MM_START_BRKPR_SET_MM_BRKPR_SET_MM_ARG_STARTPR_SET_MM_ARG_ENDPR_SET_MM_ENV_STARTPR_SET_MM_ENV_ENDPR_SET_MM_AUXVPR_SET_MM_EXE_FILEPR_SET_MM_MAPPR_SET_MM_MAP_SIZE

EINVALop is not a valid value. EPERM The caller does not have the CAP_SYS_RESOURCE capability.

Linux 3.3. Before Linux 3.10, this feature is available only if the kernel is built with the CONFIG_CHECKPOINT_RESTORE option enabled.

Standard C library (libc, -lc)

PR_SET_MM - 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), PR_SET_MM_START_CODE(2const), PR_SET_MM_END_CODE(2const), PR_SET_MM_START_DATA(2const), PR_SET_MM_END_DATA(2const), PR_SET_MM_START_STACK(2const), PR_SET_MM_START_BRK(2const), PR_SET_MM_BRK(2const), PR_SET_MM_ARG_START(2const), PR_SET_MM_ARG_END(2const), PR_SET_MM_ENV_START(2const), PR_SET_MM_ENV_END(2const), PR_SET_MM_EXE_FILE(2const), PR_SET_MM_MAP(2const), PR_SET_MM_MAP_SIZE(2const) Linux man-pages 6.9.1 2024-06-01 PR_SET_MM(2const)

Linux.

#include<linux/prctl.h> /* Definition of PR_* constants */ #include<sys/prctl.h>intprctl(PR_SET_MM,longop,...);