mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2025-01-03 12:35:02 +00:00
Code Issues Releases Activity

powerpc64: Fix early exit with invalid kernel SLB entries

Browse Source 
The check for early exit should be checking the SLB entry itself.  As
currently written it was checking the address of the SLB, which is always
non-zero, so would go through the kernel SR restore loop regardless.

Submitted by:	mmacy
MFC after:	2 weeks
This commit is contained in:
Justin Hibbits 2019-03-08 04:20:33 +00:00
parent 9ffdae0fd7
commit 1cd7081eb1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=344916
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/powerpc/aim/trap_subr64.S
View File

@ -89,7 +89,7 @@ restore_kernsrs:
GET_CPUINFO(%r28)
addi %r28,%r28,PC_KERNSLB
ld %r29,16(%r28) /* One past USER_SLB_SLOT */
cmpdi %r28,0
cmpdi %r29,0
beqlr /* If first kernel entry is invalid,
* SLBs not in use, so exit early */