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> This issue was reported by Stefan Agner in 2014 for the VF610 [1], not sure if I asked already whether there should be a Reported-by line? Stefan, have you had a chance to test this patch? 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. [ 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> > [Hi Michal, ...] could you consider > taking it for v4.2? Regards, Andreas [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-November/307297.html -- SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton; HRB 21284 (AG Nürnberg)
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