vm_map_stack, vm_map_growstack — manage process stacks

       This manual page was written by Bruce M Simpson <bms@spc.org>.

Debian                                          January 11, 2013                                 VM_MAP_STACK(9)

       The vm_map_stack() function maps a process stack for a new process image.  The stack is mapped addrbos in
       map, with a maximum size of max_ssize.  Copy-on-write flags passed in cow are also  applied  to  the  new
       mapping.  Protection bits are supplied by prot and max.

       It is typically called by execve(2).

       The  vm_map_growstack()  function  is  responsible  for  growing a stack for the process p to the desired
       address addr, similar to the legacy sbrk(2) call.

       The vm_map_stack() function calls vm_map_insert(9) to create its mappings.

       The vm_map_stack() and vm_map_growstack() functions acquire the process lock on p for the duration of the
       call.

       vm_map_stack, vm_map_growstack — manage process stacks

       The vm_map_stack() function returns KERN_SUCCESS if the mapping was allocated successfully.

       Otherwise, if mapping the stack would exceed the process's VMEM  resource  limit,  or  if  the  specified
       bottom-of-stack  address  is  out  of  range for the map, or if there is already a mapping at the address
       which would result, or if max_ssize could not be accommodated within the current  mapping,  KERN_NO_SPACE
       is returned.

       Other possible return values for this function are documented in vm_map_insert(9).

       The vm_map_growstack() function returns KERN_SUCCESS if addr is already mapped, or if the stack was grown
       successfully.

       It  also  returns  KERN_SUCCESS  if  addr  is  outside the stack range; this is done in order to preserve
       compatibility with the deprecated grow() function previously located in the file vm_machdep.c.

vm_map(9), vm_map_insert(9)

#include<sys/param.h>#include<vm/vm.h>#include<vm/vm_map.h>intvm_map_stack(vm_map_tmap,   vm_offset_taddrbos,   vm_size_tmax_ssize,  vm_prot_tprot,  vm_prot_tmax,
           intcow);

       intvm_map_growstack(structproc*p, vm_offset_taddr);