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| author | Jordan Niethe <jniethe5@gmail.com> | 2020-05-06 13:40:39 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:10:38 +1000 |
| commit | 7fccfcfba04f9cb46438f368755d368f6c57f3a0 (patch) | |
| tree | fa9b92c62b0efd6f0d84019e701abb6df206e852 /arch/powerpc/xmon | |
| parent | 6c7a4f0a9f66fc7fdc6e208559e5d562f53e0991 (diff) | |
| download | linux-stable-7fccfcfba04f9cb46438f368755d368f6c57f3a0.tar.gz linux-stable-7fccfcfba04f9cb46438f368755d368f6c57f3a0.tar.bz2 linux-stable-7fccfcfba04f9cb46438f368755d368f6c57f3a0.zip | |
powerpc/xmon: Move insertion of breakpoint for xol'ing
When a new breakpoint is created, the second instruction of that
breakpoint is patched with a trap instruction. This assumes the length
of the instruction is always the same. In preparation for prefixed
instructions, remove this assumption. Insert the trap instruction at the
same time the first instruction is inserted.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-20-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/xmon')
| -rw-r--r-- | arch/powerpc/xmon/xmon.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index d8b29f6925be..00b24f357c2b 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -878,7 +878,6 @@ static struct bpt *new_breakpoint(unsigned long a) if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { bp->address = a; bp->instr = (void *)(bpt_table + ((bp - bpts) * BPT_WORDS)); - patch_instruction(bp->instr + 1, ppc_inst(bpinstr)); return bp; } } @@ -910,6 +909,8 @@ static void insert_bpts(void) continue; } patch_instruction(bp->instr, instr); + patch_instruction((void *)bp->instr + ppc_inst_len(instr), + ppc_inst(bpinstr)); if (bp->enabled & BP_CIABR) continue; if (patch_instruction((struct ppc_inst *)bp->address, |