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| 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 /argp | |
| parent | f648728cb17bcf043b6f750f360b6c8960c491fd (diff) | |
| download | glibc-dee943668fdf97e118fe14f7953486b934cbf9c4.tar.gz glibc-dee943668fdf97e118fe14f7953486b934cbf9c4.tar.xz glibc-dee943668fdf97e118fe14f7953486b934cbf9c4.zip | |
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 'argp')
0 files changed, 0 insertions, 0 deletions