rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.

	.text
	.globl	_entry
_entry:
	.code	16
	bx	pc
	nop

	.code	32
	stmfd	sp!, {r0-r12,lr}
	mrs	r0, CPSR
	mov	r1, sp
	/* supervisor mode, disable all interrupts */
	msr	CPSR_c, #0xd3
	ldr	sp, =stack_bottom
	/* save entry SP and CPSR */
	ldr	r2, =lldbg_entry_cpsr
	str	r0, [r2]
	ldr	r2, =lldbg_entry_sp
	str	r1, [r2]
	b	main