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| author | Mark Wielaard <mjw@redhat.com> | 2013-12-18 11:05:54 +0100 |
|---|---|---|
| committer | Mark Wielaard <mjw@redhat.com> | 2013-12-20 10:09:49 +0100 |
| commit | 159ac52b061c60947a943c102298cd692223274f (patch) | |
| tree | d3d3a07d249704f95424072064e160df4ae4c156 /libebl/libebl.h | |
| parent | 565149d564cfe9da3b5cd94c9387ee0473d0704a (diff) | |
| download | android_external_elfutils-159ac52b061c60947a943c102298cd692223274f.tar.gz android_external_elfutils-159ac52b061c60947a943c102298cd692223274f.tar.bz2 android_external_elfutils-159ac52b061c60947a943c102298cd692223274f.zip | |
libdwfl: Introduce dwfl_module_getsym_info and dwfl_module_addrinfo.
Some arches like ppc64 use function descriptor values instead of function
addresses causing matching of names and addresses to fail when using
dwfl_module_getsym or dwfl_module_addrsym.
Add ebl hook to resolve any function descriptor values found in non-ET_REL
modules.
The new function dwfl_module_getsym_info doesn't adjust the symbol value
in any way, but returns the adjusted and/or resolved address associated
with the symbol separately. The new function dwfl_module_addrinfo resolves
against both the address associated with the symbol (which could be the
function entry address) value and the adjusted st_value. So that it is
easy to resolve and match either function descriptors and/or function
entry addresses.
Since these new functions also return more information they replace the
dwfl_module_getsym_elf and dwfl_module_addrsym_elf functions that never
made it into a released elfutils version.
addr2line and readelf now use the new functions when looking up functions
names. addr2line will now also display the section the address was found
in when given -x.
Extra testcases were added for both addr2line and the dwflsyms testscase.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Diffstat (limited to 'libebl/libebl.h')
| -rw-r--r-- | libebl/libebl.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libebl/libebl.h b/libebl/libebl.h index 84c2f4cd..50d6baab 100644 --- a/libebl/libebl.h +++ b/libebl/libebl.h @@ -439,6 +439,12 @@ extern bool ebl_unwind (Ebl *ebl, Dwarf_Addr pc, ebl_tid_registers_t *setfunc, bool *signal_framep) __nonnull_attribute__ (1, 3, 4, 5, 7); +/* Returns true if the value can be resolved to an address in an + allocated section, which will be returned in *ADDR + (e.g. function descriptor resolving) */ +extern bool ebl_resolve_sym_value (Ebl *ebl, GElf_Addr *addr) + __nonnull_attribute__ (2); + #ifdef __cplusplus } #endif |