On Thu, 5 Jan 2017 15:47:43 -0300 Arnaldo Carvalho de Melo <a...@kernel.org> wrote:
> Em Thu, Jan 05, 2017 at 12:30:37PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Thu, Jan 05, 2017 at 08:20:19PM +0900, Masami Hiramatsu escreveu: > > > On Wed, 4 Jan 2017 11:48:56 -0300 > > > Arnaldo Carvalho de Melo <a...@kernel.org> wrote: > > > > [acme@jouet linux]$ grep e1000_xmit_frame /proc/kallsyms > > > > ffffffffc046fc10 t e1000_xmit_frame [e1000e] > > > > [acme@jouet linux]$ > > > > OK, it sounds reasonable to me too. BTW, how can I get the map for > > > kallsyms? > > > May machine__findnew_module_map(host_machine, ,"[kernel.kallsyms]") > > > include module symbols too? > > > Probably what you want is: > > > symbol = machine__find_kernel_function_by_name(machine, name, &map); > > > Then, if symbol is not NULL, map->dso->name will have your module name, > > map->dso->long_name will have the .ko path, etc. > > Take a look at 'perf kallsyms' a simple toy cmd that exercises the APIs > you need: > > https://git.kernel.org/cgit/linux/kernel/git/acme/linux.git/commit/?h=perf/core&id=25c92235676d2655e3f31ffe02bd4355d838e5e9 > > Basically: > > struct machine *machine = machine__new_kallsyms(); > struct map *map; > struct symbol *symbol = machine__find_kernel_function_by_name(machine, > symbol_name, &map); > > Then you have symbol->{addr,end,name,etc} and map->dso->{long,short}_name Thanks for the precise information :) I'll make and send it with updated 3rd patch. Thanks again! > > $ perf kallsyms e1000_xmit_frame usb_stor_set_xfer_buf > e1000_xmit_frame: [e1000e] > /lib/modules/4.9.0+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko > 0xffffffffc046fc10-0xffffffffc0470bb0 (0x19c80-0x1ac20) > usb_stor_set_xfer_buf: [usb_storage] > /lib/modules/4.9.0+/kernel/drivers/usb/storage/usb-storage.ko > 0xffffffffc057aea0-0xffffffffc057af19 (0xf10-0xf89) > > - Arnaldo -- Masami Hiramatsu <mhira...@kernel.org>
