Commit 1b2411c2 authored Oct 26, 2015 by Richard Weinberger

um: Simplify STUB_DATA loading



As long STUB_DATA fits into 32bits we can use a plain mov.
If it will grow at some point in future we will switch to movabsq.
In any case the code is smaller and more easy to read
than the current one

Signed-off-by: Richard Weinberger <richard@nod.at>

parent 246d254f

arch/x86/um/stub_64.S

+1 −4

Original line number	Diff line number	Diff line
		@@ -3,10 +3,7 @@
		.section .__syscall_stub, "ax"
		.globl batch_syscall_stub
		batch_syscall_stub:
		mov $(STUB_DATA >> 32), %rbx
		sal $32, %rbx
		mov $(STUB_DATA & 0xffffffff), %rax
		or %rax, %rbx
		mov $(STUB_DATA), %rbx
		/* load pointer to first operation */
		mov %rbx, %rsp
		add $0x10, %rsp