diff options
| author | Mark Wielaard <[email protected]> | 2013-10-06 17:04:07 +0200 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2013-10-07 11:16:27 +0200 |
| commit | 3dec3e110bb2a2453156868e1221dc8192399e3e (patch) | |
| tree | 65eb424f42bfd80f2bcc2b6a8d1a6d96df5e475a /libebl/ChangeLog | |
| parent | 5dbbc5e32cc1fb3a7cf33e52e0bfc6f47097f3fe (diff) | |
backends: ppc_abi_cfi reg1 use DW_CFA_val_offset not DW_CFA_val_expression.
Register rules using expressions are stored using an offset from the
start of the .eh_frame or .debug_frame ELF section data. Since abi_cfi
rules aren't stored in those ELF sections they should use neither
DW_CFA_expression nor DW_CFA_val_expression. The only backend that used
DW_CFA_val_expression was ppc_cfi.c. It was easier to express the same
rule using DW_CFA_val_offset than to change the code to handle register
rules using expressions. On most architectures this did work by accident.
See the definition of struct dwarf_frame_register value in libdw/cfi.h to
see why. But on ia64 the abi_cfi data and actual frame data were placed
too far apart and caused a crash in tests/run-addrcfi.sh for ppc32.
Signed-off-by: Mark Wielaard <[email protected]>
Diffstat (limited to 'libebl/ChangeLog')
| -rw-r--r-- | libebl/ChangeLog | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libebl/ChangeLog b/libebl/ChangeLog index e81fae90..1bc08689 100644 --- a/libebl/ChangeLog +++ b/libebl/ChangeLog @@ -1,3 +1,8 @@ +2013-10-06 Mark Wielaard <[email protected]> + + * libebl.h (ebl_abi_cfi): Document restrictions using register + rules. + 2013-09-26 Petr Machata <[email protected]> * eblcorenotetypename.c: Handle NT_ARM_TLS, NT_ARM_HW_BREAK, |