VM_MAP_INSERT(9) BSD Kernel Developer's Manual VM_MAP_INSERT(9)NAME
vm_map_insert -- insert an object into a map
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
int
vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset, vm_offset_t start, vm_offset_t end, vm_prot_t prot, vm_prot_t max,
int cow);
DESCRIPTION
The vm_map_insert() function inserts a mapping for the entire vm_object object into the target map map.
The offset argument specifies the offset into the object at which to begin mapping. The object's size should match that of the specified
address range.
The start and end arguments specify the bounds of the mapped object's window in the address space of map.
The cow argument specifies the flags which should be propagated to the new entry, for example, to indicate that this is a copy-on-write map-
ping.
IMPLEMENTATION NOTES
This function implicitly creates a new vm_map_entry by calling the internal function vm_map_entry_create().
RETURN VALUES
The vm_map_insert() function returns KERN_SUCCESS if the mapping could be made successfully.
Otherwise, KERN_INVALID_ADDRESS will be returned if the start of the range could not be found, or KERN_NO_SPACE if the range was found to be
part of an existing entry or if it overlaps the end of the map.
SEE ALSO vm_map(9)AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.
BSD January 11, 2013 BSD
Check Out this Related Man Page
VM_MAP_STACK(9) BSD Kernel Developer's Manual VM_MAP_STACK(9)NAME
vm_map_stack, vm_map_growstack -- manage process stacks
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
int
vm_map_stack(vm_map_t map, vm_offset_t addrbos, vm_size_t max_ssize, vm_prot_t prot, vm_prot_t max, int cow);
int
vm_map_growstack(struct proc *p, vm_offset_t addr);
DESCRIPTION
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.
IMPLEMENTATION NOTES
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.
RETURN VALUES
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.
SEE ALSO vm_map(9), vm_map_insert(9)AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.
BSD January 11, 2013 BSD
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