zx_vmar_unmap

SUMMARY

Unmap virtual memory pages.

DECLARATION

#include <zircon/syscalls.h>

zx_status_t zx_vmar_unmap(zx_handle_t handle, zx_vaddr_t addr, size_t len);

DESCRIPTION

zx_vmar_unmap() unmaps all VMO mappings and destroys (as if [zx_vmar_destroy()] were called) all sub-regions within the absolute range including addr and ending before exclusively at addr + len. Any sub-region that is in the range must be fully in the range (i.e. partial overlaps are an error). If a mapping is only partially in the range, the mapping is split and the requested portion is unmapped.

len must be page-aligned.

RIGHTS

TODO(fxbug.dev/32253)

RETURN VALUE

zx_vmar_unmap() returns ZX_OK on success.

ERRORS

ZX_ERR_BAD_HANDLE handle is not a valid handle.

ZX_ERR_WRONG_TYPE handle is not a VMAR handle.

ZX_ERR_INVALID_ARGS addr is not page-aligned, len is 0 or not page-aligned, or the requested range partially overlaps a sub-region.

ZX_ERR_BAD_STATE handle refers to a destroyed handle.

ZX_ERR_NOT_FOUND Could not find the requested mapping.