Update comments to help explain what's going on
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@ -1,4 +1,4 @@
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/* $NetBSD: swapcontext.S,v 1.3 2018/11/23 11:38:07 skrll Exp $ */
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/* $NetBSD: swapcontext.S,v 1.4 2018/11/23 12:39:18 skrll Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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@ -33,7 +33,7 @@
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#include "assym.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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RCSID("$NetBSD: swapcontext.S,v 1.3 2018/11/23 11:38:07 skrll Exp $")
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RCSID("$NetBSD: swapcontext.S,v 1.4 2018/11/23 12:39:18 skrll Exp $")
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#endif /* LIBC_SCCS && !lint */
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/* LINTSTUB: int swapcontext(ucontext_t * restrict, ucontext_t * restrict); */
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@ -42,12 +42,12 @@ ENTRY(swapcontext)
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sub sp, sp, #32 /* allocate stack frame */
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stp x29, x30, [sp, #16] /* save FP & LR */
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add x29, sp, #16 /* new FP */
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stp x0, x1, [sp, #0] /* save oucp & ucp */
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stp x0, x1, [sp, #0] /* save oucp (x0) & ucp (x1) */
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bl _C_LABEL(_getcontext) /* getcontext(oucp) */
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mov x3, x0 /* save return value */
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ldp x2, x0, [sp, #0] /* restore oucp & ucp */
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ldp x2, x0, [sp, #0] /* load oucp (x2) & ucp (x0) */
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ldp x29, x30, [sp, #16] /* restore FP & LR */
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add sp, sp, #32 /* free stack frame */
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