diff options
| author | Mark Wielaard <[email protected]> | 2014-06-14 17:15:37 +0200 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2014-06-22 13:47:48 +0200 |
| commit | c1c1c06e30f0b3b4ae66fcfec6318a93b8f31569 (patch) | |
| tree | e5b811236c230f2ea82749f0ad9c2c4ac1bcf396 /libebl/ebl-hooks.h | |
| parent | ba9e5156207e3c2bb85adc747376e774af3c0df6 (diff) | |
libebl: Add ebl_func_addr_mask plus ARM backend implementation.
The ARM EABI says that the zero bit of function symbol st_value indicates
whether the symbol points to a THUMB or ARM function. Also the return
value address in an unwind will contain the same extra bit to indicate
whether to return to a regular ARM or THUMB function. Add a new ebl
function to mask off such bits and turn a function value into a function
address so that we get the actual value that a function symbol or return
address points to. It isn't easily possible to reuse the existing
ebl_resolve_sym_value for this purpose, so we end up with another hook
that can be used from dwfl_module_getsym, handle_cfi and elflint.
Signed-off-by: Mark Wielaard <[email protected]>
Diffstat (limited to 'libebl/ebl-hooks.h')
| -rw-r--r-- | libebl/ebl-hooks.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libebl/ebl-hooks.h b/libebl/ebl-hooks.h index 65c62ec6..e1186f86 100644 --- a/libebl/ebl-hooks.h +++ b/libebl/ebl-hooks.h @@ -187,7 +187,7 @@ bool EBLHOOK(unwind) (Ebl *ebl, Dwarf_Addr pc, ebl_tid_registers_t *setfunc, bool *signal_framep); /* Returns true if the value can be resolved to an address in an - allocated section, which will be returned in *SHNDXP. + allocated section, which will be returned in *ADDR. (e.g. function descriptor resolving) */ bool EBLHOOK(resolve_sym_value) (Ebl *ebl, GElf_Addr *addr); |