diff options
| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2017-12-11 08:47:51 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.vnet.ibm.com> | 2017-12-11 08:47:51 +0100 |
| commit | dee943668fdf97e118fe14f7953486b934cbf9c4 (patch) | |
| tree | 486d68e7823f15f9031da4b49bfc3d8b284d336c /ChangeLog | |
| parent | f648728cb17bcf043b6f750f360b6c8960c491fd (diff) | |
S390: Add CFI rule in _dl_runtime_resolve[_vx] for unwinding.
In _dl_runtime_resolve[_vx], unwinding fails after the new stack frame
is created as there is no CFI rule for r15. This is also observeable in
GDB: Backtrace stopped: previous frame inner to this frame (corrupt stack?)
Therefore this patch is now storing r15 on stack and is using cfi_offset rule.
The stmg/lmg instruction is used to store/load r14 and r15 with one instruction.
On 64bit, the offsets of the fprs have moved to store r15 directly after r14.
On 31bit, the r14/r15 is now stored between the other gprs and fprs as the space
wasn't used.
ChangeLog:
* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_resolve):
Store r15 on stack and add cfi rule.
* sysdeps/s390/s390-32/dl-trampoline.h (_dl_runtime_resolve):
Likewise.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -1,3 +1,10 @@ +2017-12-11 Stefan Liebler <stli@linux.vnet.ibm.com> + + * sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_resolve): + Store r15 on stack and add cfi rule. + * sysdeps/s390/s390-32/dl-trampoline.h (_dl_runtime_resolve): + Likewise. + 2017-12-10 Aurelien Jarno <aurelien@aurel32.net> [BZ #22577] |