Soft reboot the system with a new kernel and bootimage.
#include <zircon/syscalls.h> zx_status_t zx_system_mexec(zx_handle_t resource, zx_handle_t kernel_vmo, zx_handle_t bootimage_vmo);
zx_system_mexec() accepts two vmo handles: kernel_vmo should contain a
kernel image and bootimage_vmo should contain an initrd whose address shall
be passed to the new kernel as a kernel argument.
To supplant the running kernel, a resource of ZX_RSRC_KIND_ROOT must be supplied.
zx_system_mexec() shall supplant the currently running kernel
image with the kernel image contained within kernel_vmo, load the ramdisk
contained within bootimage_vmo to a location in physical memory and branch
directly into the new kernel while providing the address of the loaded initrd
to the new kernel.
resource must have resource kind ZX_RSRC_KIND_ROOT.
kernel_vmo must be of type ZX_OBJ_TYPE_VMO and have ZX_RIGHT_READ.
bootimage_vmo must be of type ZX_OBJ_TYPE_VMO and have ZX_RIGHT_READ.
zx_system_mexec() shall not return upon success.
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