From mboxrd@z Thu Jan 1 00:00:00 1970 From: linus.walleij@linaro.org (Linus Walleij) Date: Mon, 2 Jan 2017 21:15:29 +0100 Subject: [PATCH 15/20] ARM/hw_breakpoint: Convert to hotplug state machine In-Reply-To: <20170102150015.GJ14217@n2100.armlinux.org.uk> References: <20161117183541.8588-1-bigeasy@linutronix.de> <20161117183541.8588-16-bigeasy@linutronix.de> <20170102150015.GJ14217@n2100.armlinux.org.uk> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Jan 2, 2017 at 4:00 PM, Russell King - ARM Linux wrote: > On Mon, Jan 02, 2017 at 03:34:32PM +0100, Linus Walleij wrote: >> in the first line of arch_hw_breakpoint_init() in >> arch/arm/kernel/hw_breakpoint.c >> >> I suspect that is not an accepable solution ... >> >> It hangs at PC is at write_wb_reg+0x20c/0x330 >> Which is c03101dc, and looks like this in objdump -d: >> >> c031020c: ee001eba mcr 14, 0, r1, cr0, cr10, {5} >> c0310210: eaffffb3 b c03100e4 > > ... and this is several instructions after the address you mention above. > Presumably c03101dc is accessing a higher numbered register? Ah sorry. It looks like this: c03101dc: ee001ed0 mcr 14, 0, r1, cr0, cr0, {6} c03101e0: eaffffbf b c03100e4 c03101e4: ee001ebf mcr 14, 0, r1, cr0, cr15, {5} c03101e8: eaffffbd b c03100e4 c03101ec: ee001ebe mcr 14, 0, r1, cr0, cr14, {5} c03101f0: eaffffbb b c03100e4 c03101f4: ee001ebd mcr 14, 0, r1, cr0, cr13, {5} c03101f8: eaffffb9 b c03100e4 Yours, Linus Walleij