plucky (2) PR_SET_VMA.2const.gz

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NAME
       PR_SET_VMA - set an attribute for virtual memory areas


LIBRARY
       Standard C library (libc, -lc)


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

       int prctl(PR_SET_VMA, long attr, unsigned long addr, unsigned long size,
                 const char *_Nullable val);


DESCRIPTION
       Sets  an attribute specified in attr for virtual memory areas starting from the address specified in addr
       and spanning the size specified in size.  val specifies the value of the attribute to be set.

       Note that assigning an attribute to a virtual memory  area  might  prevent  it  from  being  merged  with
       adjacent virtual memory areas due to the difference in that attribute's value.

       Currently, attr must be one of:

       PR_SET_VMA_ANON_NAME
              Set  a  name  for  anonymous  virtual  memory areas.  val should be a pointer to a null-terminated
              string containing the name.  The name length including null byte cannot exceed 80 bytes.   If  val
              is  NULL,  the name of the appropriate anonymous virtual memory areas will be reset.  The name can
              contain only printable ascii characters (isprint(3)), except '[', ']', '\', '$', and '`'.


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


ERRORS
       EINVAL attr is not a valid attribute.

       EINVAL addr is an invalid address.


STANDARDS
       Linux.


HISTORY
       Linux 5.17.


SEE ALSO
       prctl(2)