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powerpc64: Fix stack setup in dbtrap

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r330610 relocated the DMAP from the base of memory to the base of the fourth
quadrant of memory.  This broke synthetic traps, such as KDB forced
breakpoints.  Use GET_TOCBASE() so the DMAP offset is handled.

Submitted by:	git_bdragon.rkt0.net
Differential Revision:	https://reviews.freebsd.org/D15973
This commit is contained in:
Justin Hibbits 2018-06-23 01:42:34 +00:00
parent 9f4c522e6b
commit ab42fbe2e9
1 changed files with 1 additions and 1 deletions
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2
sys/powerpc/aim/trap_subr64.S
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@ -896,7 +896,7 @@ dbtrap:
andi. %r1,%r1,0xff00
mtsprg3 %r1
ld %r1,TRAP_TOCBASE(0) /* get new SP */
GET_TOCBASE(%r1) /* get new SP */
ld %r1,TOC_REF(tmpstk)(%r1)
addi %r1,%r1,(TMPSTKSZ-48)