Am 21.05.2015 um 01:04 schrieb Andreas Färber: > Hi, > > Am 18.05.2015 um 13:47 schrieb Maxime Coquelin: >> 2015-05-09 9:53 GMT+02:00 Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>: >>> When Kernel is executed in place from ROM, the symbol addresses can be >>> lower than the page offset. >>> >>> Tested-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> >>> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx> [...] > 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 Färber <afaerber@xxxxxxx> -- SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton; HRB 21284 (AG Nürnberg)
Attachment:
signature.asc
Description: OpenPGP digital signature
