Hi,
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 observable 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.
Okay to commit?
Bye.
Stefan
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.