svn commit: r344871 - head/sys/powerpc/powerpc

[Justin Hibbits]

Author: jhibbits
Date: Thu Mar  7 04:43:08 2019
New Revision: 344871
URL: https://svnweb.freebsd.org/changeset/base/344871

Log:
  powerpc: Save stack pointer in savectx
  
  This allows 'show acttrace' to show backtrace on processes currently running
  on CPUs.
  
  Reported by:	Brandon Bergren
  MFC after:	1 week

Modified:
  head/sys/powerpc/powerpc/swtch32.S
  head/sys/powerpc/powerpc/swtch64.S

Modified: head/sys/powerpc/powerpc/swtch32.S
==============================================================================
--- head/sys/powerpc/powerpc/swtch32.S	Thu Mar  7 04:40:44 2019	(r344870)
+++ head/sys/powerpc/powerpc/swtch32.S	Thu Mar  7 04:43:08 2019	(r344871)
@@ -195,6 +195,7 @@ ENTRY(savectx)
 	stmw	%r12,PCB_CONTEXT(%r3)	/* Save the non-volatile GP regs */
 	mfcr	%r4			/* Save the condition register */
 	stw	%r4,PCB_CR(%r3)
+	stw	%r1,PCB_SP(%r3)		/* Save the stack pointer */
 	mflr	%r4			/* Save the link register */
 	stw	%r4,PCB_LR(%r3)
 	blr

Modified: head/sys/powerpc/powerpc/swtch64.S
==============================================================================
--- head/sys/powerpc/powerpc/swtch64.S	Thu Mar  7 04:40:44 2019	(r344870)
+++ head/sys/powerpc/powerpc/swtch64.S	Thu Mar  7 04:43:08 2019	(r344871)
@@ -276,6 +276,7 @@ ENTRY(savectx)
 
 	mfcr	%r4			/* Save the condition register */
 	std	%r4,PCB_CR(%r3)
+	std	%r1,PCB_SP(%r3)		/* Save the stack pointer */
 	std	%r2,PCB_TOC(%r3)	/* Save the TOC pointer */
 	mflr	%r4			/* Save the link register */
 	std	%r4,PCB_LR(%r3)