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| author |   Helge Deller <deller@gmx.de> | 2021-11-09 22:25:02 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2022-03-18 09:10:14 +0100 |
| commit | 9b046d0245cec982c72a65d3ea1b834959a9708b (patch) | |
| tree | d361a9686a4bc99ccc0122014c0800353e357d14 /arch/parisc/include | |
| parent | parisc: Improve CPU socket and core bootup info text (diff) | |
| download | linux-dev-9b046d0245cec982c72a65d3ea1b834959a9708b.tar.xz linux-dev-9b046d0245cec982c72a65d3ea1b834959a9708b.zip | |
parisc: Avoid using hardware single-step in kprobes
This patch changes the kprobe and kretprobe feature to use another
break instruction instead of relying on the hardware single-step
feature.
That way those kprobes now work in qemu as well, because in qemu we
don't emulate yet single-stepping.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/include')
| -rw-r--r-- | arch/parisc/include/asm/kprobes.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/parisc/include/asm/kprobes.h b/arch/parisc/include/asm/kprobes.h index 904034da4974..0a175ac87698 100644 --- a/arch/parisc/include/asm/kprobes.h +++ b/arch/parisc/include/asm/kprobes.h @@ -18,8 +18,9 @@ #include <linux/notifier.h> #define PARISC_KPROBES_BREAK_INSN 0x3ff801f +#define PARISC_KPROBES_BREAK_INSN2 0x3ff801e #define __ARCH_WANT_KPROBES_INSN_SLOT -#define MAX_INSN_SIZE 1 +#define MAX_INSN_SIZE 2 typedef u32 kprobe_opcode_t; struct kprobe; @@ -29,7 +30,7 @@ void arch_remove_kprobe(struct kprobe *p); #define flush_insn_slot(p) \ flush_icache_range((unsigned long)&(p)->ainsn.insn[0], \ (unsigned long)&(p)->ainsn.insn[0] + \ - sizeof(kprobe_opcode_t)) + MAX_INSN_SIZE*sizeof(kprobe_opcode_t)) #define kretprobe_blacklist_size 0 |