[PATCH 05/12] powerpc/ftrace: ftrace_graph_caller() needs to save/restore toc

[Michael Ellerman]

Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
---
 arch/powerpc/kernel/entry_64.S | 8 ++++++++
 1 file changed, 8 insertions(+)

Squash.

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 2a7313cfbc7d..9e77a2c8f218 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -1237,6 +1237,11 @@ _GLOBAL(ftrace_graph_caller)
 	std	r5, 64(r1)
 	std	r4, 56(r1)
 	std	r3, 48(r1)
+
+	/* Save callee's TOC in the ABI compliant location */
+	std	r2, 24(r1)
+	ld	r2, PACATOC(r13)	/* get kernel TOC in r2 */
+
 	mfctr	r4		/* ftrace_caller has moved local addr here */
 	std	r4, 40(r1)
 	mflr	r3		/* ftrace_caller has restored LR from stack */
@@ -1262,6 +1267,9 @@ _GLOBAL(ftrace_graph_caller)
 	ld	r4, 56(r1)
 	ld	r3, 48(r1)
 
+	/* Restore callee's TOC */
+	ld	r2, 24(r1)
+
 	addi	r1, r1, 112
 	mflr	r0
 	std	r0, LRSAVE(r1)
-- 
2.5.0