* dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs? @ 2018-12-13 20:27 Luke Diamand [not found] ` <CAORpzuOC4yGnrbtYjD=kxhJ-ytfJ0tQ3+iDq1NPZ9g8jenVi0g@mail.gmail.com> 0 siblings, 1 reply; 4+ messages in thread From: Luke Diamand @ 2018-12-13 20:27 UTC (permalink / raw) To: elfutils-devel; +Cc: Roland McGrath I'm trying to get callstacks out of a core file using libdwfl where the ELF files live in a sysroot (and are from a different architecture, ARM). I'm possibly doing something stupid as I find that dwfl_link_map_report() opens /lib/libpthread.so on the *host* rather than the libpthread.so from my sysroot. It obviously doesn't then get very far. I called elf_begin(), dwfl_begin() and then dwfl_core_file_report(), passing in the path to the executable (in the sysroot). There's a comment in link_map.c around line 390 which says: // XXX hook for sysroot So inspired by this, I hacked in some code to open files relative to my sysroot and it all started working. Am I just missing some obvious setup, or is this just missing sysroot support? Thanks! Luke ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <CAORpzuOC4yGnrbtYjD=kxhJ-ytfJ0tQ3+iDq1NPZ9g8jenVi0g@mail.gmail.com>]
* Re: dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs? [not found] ` <CAORpzuOC4yGnrbtYjD=kxhJ-ytfJ0tQ3+iDq1NPZ9g8jenVi0g@mail.gmail.com> @ 2018-12-14 13:44 ` Luke Diamand 2019-01-06 21:04 ` Mark Wielaard 0 siblings, 1 reply; 4+ messages in thread From: Luke Diamand @ 2018-12-14 13:44 UTC (permalink / raw) To: Roland McGrath; +Cc: elfutils-devel On Thu, 13 Dec 2018 at 22:37, Roland McGrath <roland@hack.frob.com> wrote: > > I think it's just missing. The hardest part is just deciding how the configuration should work. Thanks. My current attempt adds a new function call, dwfl_set_sysroot(), which works, but feels a bit clunky. I might see if I can just use the find_elf callback instead. > > On Thu, Dec 13, 2018, 12:27 Luke Diamand <luke@diamand.org wrote: >> >> I'm trying to get callstacks out of a core file using libdwfl where >> the ELF files live in a sysroot (and are from a different >> architecture, ARM). >> >> I'm possibly doing something stupid as I find that >> dwfl_link_map_report() opens /lib/libpthread.so on the *host* rather >> than the libpthread.so from my sysroot. It obviously doesn't then get >> very far. >> >> I called elf_begin(), dwfl_begin() and then dwfl_core_file_report(), >> passing in the path to the executable (in the sysroot). >> >> There's a comment in link_map.c around line 390 which says: >> >> // XXX hook for sysroot >> >> So inspired by this, I hacked in some code to open files relative to >> my sysroot and it all started working. >> >> Am I just missing some obvious setup, or is this just missing sysroot support? >> >> Thanks! >> Luke >> > -- > > > Thanks, > Roland ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs? 2018-12-14 13:44 ` Luke Diamand @ 2019-01-06 21:04 ` Mark Wielaard 2019-01-06 22:04 ` Luke Diamand 0 siblings, 1 reply; 4+ messages in thread From: Mark Wielaard @ 2019-01-06 21:04 UTC (permalink / raw) To: Luke Diamand; +Cc: Roland McGrath, elfutils-devel On Fri, Dec 14, 2018 at 01:44:17PM +0000, Luke Diamand wrote: > On Thu, 13 Dec 2018 at 22:37, Roland McGrath <roland@hack.frob.com> wrote: > > > > I think it's just missing. The hardest part is just deciding how the configuration should work. > > Thanks. My current attempt adds a new function call, > dwfl_set_sysroot(), which works, but feels a bit clunky. I might see > if I can just use the find_elf callback instead. If you got this working please let us know. It might help others and/or deciding how to add a proper interface/config/hook for it. Thanks, Mark ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs? 2019-01-06 21:04 ` Mark Wielaard @ 2019-01-06 22:04 ` Luke Diamand 0 siblings, 0 replies; 4+ messages in thread From: Luke Diamand @ 2019-01-06 22:04 UTC (permalink / raw) To: Mark Wielaard; +Cc: Roland McGrath, elfutils-devel On Sun, 6 Jan 2019 at 21:04, Mark Wielaard <mark@klomp.org> wrote: > > On Fri, Dec 14, 2018 at 01:44:17PM +0000, Luke Diamand wrote: > > On Thu, 13 Dec 2018 at 22:37, Roland McGrath <roland@hack.frob.com> wrote: > > > > > > I think it's just missing. The hardest part is just deciding how the configuration should work. > > > > Thanks. My current attempt adds a new function call, > > dwfl_set_sysroot(), which works, but feels a bit clunky. I might see > > if I can just use the find_elf callback instead. > > If you got this working please let us know. > It might help others and/or deciding how to add a proper > interface/config/hook for it. > I have a fix which I think does the right thing - I've been playing around with core files from a Raspberry Pi and analysing them on a Linux x86 PC using eu-stack. Christmas and New Year intervened but I hope to submit something once I've recovered from that. Thanks! Luke ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-01-06 22:04 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2018-12-13 20:27 dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs? Luke Diamand [not found] ` <CAORpzuOC4yGnrbtYjD=kxhJ-ytfJ0tQ3+iDq1NPZ9g8jenVi0g@mail.gmail.com> 2018-12-14 13:44 ` Luke Diamand 2019-01-06 21:04 ` Mark Wielaard 2019-01-06 22:04 ` Luke Diamand
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