From: Paul Mundt Date: Tue, 22 Dec 2009 03:40:38 +0000 (+0900) Subject: sh: Don't NOTIFY_STOP for non-UBC breakpoint traps. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b74ab703b1326aafadb5604ff6200da62c61df49;p=mv-sheeva.git sh: Don't NOTIFY_STOP for non-UBC breakpoint traps. Presently the hw_breakpoint code is the primary notifier dispatch for breakpoint traps, although it's only UBC traps that are of particular interest there. This patches in a check to allow non-UBC generated breakpoints to pass through down the remainder of the notifier chain, giving things like kgdb a chance at getting notified. Signed-off-by: Paul Mundt --- diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c index 75b8c471120..022d8ed66bd 100644 --- a/arch/sh/kernel/hw_breakpoint.c +++ b/arch/sh/kernel/hw_breakpoint.c @@ -398,9 +398,18 @@ BUILD_TRAP_HANDLER(breakpoint) int __kprobes hw_breakpoint_exceptions_notify(struct notifier_block *unused, unsigned long val, void *data) { + struct die_args *args = data; + if (val != DIE_BREAKPOINT) return NOTIFY_DONE; + /* + * If the breakpoint hasn't been triggered by the UBC, it's + * probably from a debugger, so don't do anything more here. + */ + if (args->trapnr != 0x1e0) + return NOTIFY_DONE; + return hw_breakpoint_handler(data); }