[PATCH 3/3] uprobes/powerpc: ignore trap variants during register
From: Ananth N Mavinakayanahalli The current implementation of uprobes assumes that uprobes always wins even when a register request is at a location with a conditional breakpoint by some other entity. Refer to [1] for more details. Remove the breakpoint instruction check during registration on powerpc, so that uprobes behavior on powerpc matches that of x86. [1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2013-March/104771.html Signed-off-by: Ananth N Mavinakayanahalli --- arch/powerpc/kernel/uprobes.c |6 -- 1 file changed, 6 deletions(-) Index: linux-3.9-rc3/arch/powerpc/kernel/uprobes.c === --- linux-3.9-rc3.orig/arch/powerpc/kernel/uprobes.c +++ linux-3.9-rc3/arch/powerpc/kernel/uprobes.c @@ -53,12 +53,6 @@ int arch_uprobe_analyze_insn(struct arch if (addr & 0x03) return -EINVAL; - /* -* We currently don't support a uprobe on an already -* existing breakpoint instruction underneath -*/ - if (is_trap(auprobe->ainsn)) - return -ENOTSUPP; return 0; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 3/3] uprobes/powerpc: ignore trap variants during register
From: Ananth N Mavinakayanahalli ana...@in.ibm.com The current implementation of uprobes assumes that uprobes always wins even when a register request is at a location with a conditional breakpoint by some other entity. Refer to [1] for more details. Remove the breakpoint instruction check during registration on powerpc, so that uprobes behavior on powerpc matches that of x86. [1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2013-March/104771.html Signed-off-by: Ananth N Mavinakayanahalli ana...@in.ibm.com --- arch/powerpc/kernel/uprobes.c |6 -- 1 file changed, 6 deletions(-) Index: linux-3.9-rc3/arch/powerpc/kernel/uprobes.c === --- linux-3.9-rc3.orig/arch/powerpc/kernel/uprobes.c +++ linux-3.9-rc3/arch/powerpc/kernel/uprobes.c @@ -53,12 +53,6 @@ int arch_uprobe_analyze_insn(struct arch if (addr 0x03) return -EINVAL; - /* -* We currently don't support a uprobe on an already -* existing breakpoint instruction underneath -*/ - if (is_trap(auprobe-ainsn)) - return -ENOTSUPP; return 0; } -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
