rvinterf: begin change to backslash escape output format Right now throughout the rvinterf suite, any time we emit output that is expected to be ASCII, but may contain non-printable garbage, we use 'cat -v' form of garbage character representation. Unfortunately, this transformation is lossy (can't be reversed 100% reliably in the user's wetware), hence we would like to migrate to C-style backslash escapes, including doubling of any already-present backslashes - this escape mechanism is lossless. Begin this change by converting the output of RV and L1 traces in rvinterf and rvtdump.

#include "halt.h"

	.text
	.code	32
	.global	_entry
_entry:
	ldr	sp, =stack_bottom
@ zero bss
	ldr	r0, =__bss_start
	ldr	r2, =__bss_end
	sub	r1, r2, r0
	bl	bzero
@ C code entry
	bl	main
	mov	r0, #HALTCODE_MAINEXITED
	.global	_exit
_exit:	nop
1:	nop
	b	1b