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revise for ppc64

This commit is contained in:
ross 2006-07-05 18:12:54 +00:00
parent a9ea5c11ba
commit 50500ff1b2
1 changed files with 13 additions and 12 deletions
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25
lib/libc/arch/powerpc64/gen/swapcontext.S
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@ -1,4 +1,4 @@
/* $NetBSD: swapcontext.S,v 1.1 2006/07/01 16:37:20 ross Exp $ */
/* $NetBSD: swapcontext.S,v 1.2 2006/07/05 18:12:54 ross Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -37,30 +37,31 @@
*/
#include "SYS.h"
#include "assym.h"
#if defined(LIBC_SCCS) && !defined(lint)
.text
.asciz "$NetBSD: swapcontext.S,v 1.1 2006/07/01 16:37:20 ross Exp $"
.asciz "$NetBSD: swapcontext.S,v 1.2 2006/07/05 18:12:54 ross Exp $"
#endif /* LIBC_SCCS && !lint */
ENTRY(swapcontext)
mc_off = 56 # offset of uc_mcontext
stdu %r1,-SF_SZ(%r1) # set up new stack frame
mflr %r0
std %r0,SF_SZ+SF_LR(%r1) # save link register
stw %r3,SF_PARAM(%r1) # must save oucp (was 8)
stw %r4,SF_PARAM+8(%r1) # must save ucp (was 12)
bl PIC_PLT(_C_LABEL(_getcontext)) # getcontext(oucp)
std %r0,[SF_SZ+SF_LR](%r1) # save link register
std %r3,SF_PARAM(%r1) # must save oucp (was 8)
std %r4,SF_PARAM+8(%r1) # must save ucp (was 12)
bl ._getcontext # getcontext(oucp)
nop
cmpdi %r3,0
bne 1f
ld %r11,SF_PARAM(%r1) # load oucp for adjustment
lwz %r0,SF_SZ+SF_LR(%r1) # get lr back
stw %r0,(48 + 34 * 4)(%r11) # pc <- lr
ld %r0,SF_SZ+SF_LR(%r1) # get LR back
std %r0,mc_off+34*8(%r11) # pc <- lr
la %r0,16(%r1)
stw %r0,(48 + 1 * 4)(%r11) # adjust sp
lwz %r3,12(%r1) # load ucp
bl PIC_PLT(_C_LABEL(setcontext)) # setcontext(ucp)
std %r0,mc_off+1*8(%r11) # adjust sp
ld %r3,SF_PARAM+8(%r1) # load ucp
bl .setcontext # setcontext(ucp)
nop
1:
ld %r0,SF_SZ+SF_LR(%r1)
mtlr %r0