Messages in this thread | | | Date | Wed, 30 Dec 2009 11:10:16 -0200 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 3/3] perf tools: adjust symbol address |
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Em Wed, Dec 30, 2009 at 11:18:55AM +0800, Xiao Guangrong escreveu: > Using relocation offset adjust symbol address if we get > kernel symbol name form elf file > > diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c > index 79ca6a0..5b58d34 100644 > --- a/tools/perf/util/symbol.c > +++ b/tools/perf/util/symbol.c > @@ -19,6 +19,18 @@ > #define NT_GNU_BUILD_ID 3 > #endif > > +static s32 relocate_offset; > +void update_relocate_offset(s32 offset) > +{ > + relocate_offset = offset; > +} > + > +static inline void update_kernel_address(GElf_Sym *sym, bool kernel) > +{ > + if (kernel) > + sym->st_value += relocate_offset; > +}
This should be done on the dso level, we may process multiple kernels, some with relocation, some without.
Humm, even at the _map_ level, because then we can just use the normal map_ip mechanism, this time the not using the identity map stuff, i.e. we have to get an IP from some event, then subtract the relocate_offset that will be in map->start.
- Arnaldo
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