From mboxrd@z Thu Jan 1 00:00:00 1970 From: afaerber@suse.de (=?windows-1252?Q?Andreas_F=E4rber?=) Date: Fri, 22 May 2015 22:20:35 +0200 Subject: [PATCH v8 01/16] scripts: link-vmlinux: Don't pass page offset to kallsyms if XIP Kernel In-Reply-To: <555D12F8.4000403@suse.de> References: <1431158038-3813-1-git-send-email-mcoquelin.stm32@gmail.com> <1431158038-3813-2-git-send-email-mcoquelin.stm32@gmail.com> <555D12F8.4000403@suse.de> Message-ID: <555F8F93.7000705@suse.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Am 21.05.2015 um 01:04 schrieb Andreas F?rber: > Hi, > > Am 18.05.2015 um 13:47 schrieb Maxime Coquelin: >> 2015-05-09 9:53 GMT+02:00 Maxime Coquelin : >>> When Kernel is executed in place from ROM, the symbol addresses can be >>> lower than the page offset. >>> >>> Tested-by: Chanwoo Choi >>> Signed-off-by: Maxime Coquelin [...] > Back then on STM32F4 I debugged that disabling KALLSYMS works around it. > > Now on a different XIP target I have confirmed this patch to help show a > stacktrace (my clk driver was missing some CLK_DIVIDER_ALLOW_ZEROs) ... > although my earlyprintk serial output still gets stuck further down the > stacktrace - probably unrelated. FTR confirming my suspicion: insufficient power supply. ;) Andreas > [ 0.000000] ------------[ cut here ]------------ > [ 0.000000] WARNING: CPU: 0 PID: 0 at drivers/clk/clk-divider.c:126 > divider_recalc_rate+0x2b/0x44() > [ 0.000000] SYS: Zero divisor and CLK_DIVIDER_ALLOW_ZERO not set > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted > 4.1.0-rc4-next-20150519+ #23 > [ 0.000000] Hardware name: XMC4000 (Device Tree Support) > [ 0.000000] [<0800bd5d>] (unwind_backtrace) from [<0800b0cb>] > (show_stack+0xb/0xc) > [ 0.000000] [<0800b0cb>] (show_stack) from [<0800e0a5>] > (warn_slowpath_common+0x55/0x78) > [ 0.000000] [<0800e0a5>] (warn_slowpath_common) from [<0800e103>] > (warn_slowpath_fmt+0x1b/0x24) > [ 0.000000] [<0800e103>] (warn_slowpath_fmt) from [<080942e3>] (divide > > But this is definitely an improvement for ARMv7-M debugging, > > Tested-by: Andreas F?rber -- SUSE Linux GmbH, Maxfeldstr. 5, 90409 N?rnberg, Germany GF: Felix Imend?rffer, Jane Smithard, Dilip Upmanyu, Graham Norton; HRB 21284 (AG N?rnberg) -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: OpenPGP digital signature URL: