Subject: [PATCH v1 3/8] powerpc/xmon: Add patch_instruction supporf for xmon

From: Balbir Singh <[email-masked]>
Date: Thu, 25 May 2017 13:36:45 +1000

Move from mwrite() to patch_instruction() for xmon for
breakpoint addition and removal.

Signed-off-by: Balbir Singh <[email-masked]>
---
 arch/powerpc/xmon/xmon.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index f11f656..0952014 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -53,6 +53,7 @@
 #include <asm/xive.h>
 #include <asm/opal.h>
 #include <asm/firmware.h>
+#include <asm/code-patching.h>
 
 #ifdef CONFIG_PPC64
 #include <asm/hvcall.h>
@@ -837,7 +838,8 @@ static void insert_bpts(void)
 		store_inst(&bp->instr[0]);
 		if (bp->enabled & BP_CIABR)
 			continue;
-		if (mwrite(bp->address, &bpinstr, 4) != 4) {
+		if (patch_instruction((unsigned int *)bp->address,
+							bpinstr) != 0) {
 			printf("Couldn't write instruction at %lx, "
 			       "disabling breakpoint there\n", bp->address);
 			bp->enabled &= ~BP_TRAP;
@@ -874,7 +876,8 @@ static void remove_bpts(void)
 			continue;
 		if (mread(bp->address, &instr, 4) == 4
 		    && instr == bpinstr
-		    && mwrite(bp->address, &bp->instr, 4) != 4)
+		    && patch_instruction(
+			(unsigned int *)bp->address, bp->instr[0]) != 0)
 			printf("Couldn't remove breakpoint at %lx\n",
 			       bp->address);
 		else
-- 
2.9.3