Differential D28497 Diff 84007 stand/efi/loader/arch/amd64/amd64_tramp.S

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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.		* SUCH DAMAGE.
*		*
* $FreeBSD$		* $FreeBSD$
*/		*/

#include <machine/asmacros.h>		#include <machine/asmacros.h>

		#define ASM_FILE
		#include "multiboot2.h"

.text		.text
.globl amd64_tramp		.globl amd64_tramp

/*		/*
* void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend,		* void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend,
* uint64_t modulep, uint64_t pagetable, uint64_t entry)		* uint64_t modulep, uint64_t pagetable, uint64_t entry)
*/		*/
amd64_tramp:		amd64_tramp:
Show All 11 Lines	amd64_tramp:
salq $32,%r13 /* Shift modulep and push it. */		salq $32,%r13 /* Shift modulep and push it. */
pushq %r13		pushq %r13
pushq %r15 /* Push the entry address. */		pushq %r15 /* Push the entry address. */
movq %r14,%cr3 /* Switch page tables. */		movq %r14,%cr3 /* Switch page tables. */
ret /* "Return" to kernel entry. */		ret /* "Return" to kernel entry. */

ALIGN_TEXT		ALIGN_TEXT
amd64_tramp_end:		amd64_tramp_end:

		/* void multiboot2_exec(uint64_t entry, uint64_t multiboot_info, uint64_t stack) */
		.globl multiboot2_exec
		multiboot2_exec:
		movq %rdx,%rsp
		pushq %rdi
		movq %rsi,%rbx
		movq $MULTIBOOT2_BOOTLOADER_MAGIC,%rax
		ret

.data		.data
.globl amd64_tramp_size		.globl amd64_tramp_size
amd64_tramp_size:		amd64_tramp_size:
.long amd64_tramp_end-amd64_tramp		.long amd64_tramp_end-amd64_tramp