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powerpc/xmon: Add patch_instruction() support for xmon

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

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Balbir Singh 2017-06-27 17:48:58 +10:00 committed by Michael Ellerman
parent f3eca95638
commit efe4fbb1ac
1 changed files with 5 additions and 2 deletions
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7
arch/powerpc/xmon/xmon.c
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@ -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