diff options
| author | Mark Wielaard <[email protected]> | 2017-05-21 23:33:15 +0200 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2017-06-12 20:52:13 +0200 |
| commit | 660aafcf78818424248faccf2ccab4ac9deee582 (patch) | |
| tree | 7a864558f99575e004d42f7ee5da75ddfb58dab3 /tests/backtrace-subr.sh | |
| parent | 6358858c4d65e8fb12a112198ee1d4bcab0be876 (diff) | |
ppc64: Add minimal fallback unwinder.
This adds a minimal fallback unwinder for ppc64[le] in case we cannot find
CFI for a particular address. It simply always sets the program counter to
the link register, picks the previous stack pointer from the backchain,
and the previous link register from the LR save area.
This is enough for some simple situations when we don't have CFI and
seems to work nicely in the case of perf with libdw powerpc support:
https://lkml.org/lkml/2017/5/18/998
Signed-off-by: Mark Wielaard <[email protected]>
Diffstat (limited to 'tests/backtrace-subr.sh')
| -rw-r--r-- | tests/backtrace-subr.sh | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/backtrace-subr.sh b/tests/backtrace-subr.sh index 9731c43a..c1f31569 100644 --- a/tests/backtrace-subr.sh +++ b/tests/backtrace-subr.sh @@ -59,7 +59,7 @@ check_backtracegen() # Ignore it here as it is a bug of OS, not a bug of elfutils. check_err() { - if [ $(egrep -v <$1 'dwfl_thread_getframes: (No DWARF information found|no matching address range|address out of range|Invalid register)$' \ + if [ $(egrep -v <$1 'dwfl_thread_getframes: (No DWARF information found|no matching address range|address out of range|Invalid register|\(null\))$' \ | wc -c) \ -eq 0 ] then |