title: checking the contents of SCTLR
body: <p>I have come across the fact that Arm V7 ISA supports unaligned memory access for some load and store instructions and the    <code>A</code> bit in    <code>SCTLR</code> controls whether an alignment fault is raised when unaligned access is tried .I wanted to know what instruction can be used to write or read the    <code>SCTLR</code> .I found <code>MRS /MSR</code> will act only on <code>CPSR</code></p>