hw_x86_64: Create temporary copy of client RAX in kernel entry

Copy client context RAX value to buffer to enable use of RAX as scratch register.
2015-02-20 16:04:01 +01:00 · 2015-02-20 16:04:01 +01:00 · 16496af371
parent 43bd925c7f
commit 16496af371
1 changed files with 4 additions and 0 deletions
--- a/repos/base-hw/src/core/spec/x86_64/mode_transition.s
+++ b/repos/base-hw/src/core/spec/x86_64/mode_transition.s
@ -73,6 +73,10 @@
 	 */
 	.global _mt_kernel_entry_pic
 	_mt_kernel_entry_pic:
+
+	/* Copy client context RAX to buffer */
+	mov %rax, _mt_buffer
+
 	1: jmp 1b

 	.global _mt_user_entry_pic