[src/trunk]: src/sys/lib/libunwind The return address register entry is the D...

[joerg <joerg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/717eb57ea781
branches:  trunk
changeset: 953012:717eb57ea781
user:      joerg <joerg%NetBSD.org@localhost>
date:      Tue Feb 23 15:07:32 2021 +0000

description:
The return address register entry is the DWARF register. On PowerPC,
this is not the same as the internal encoding, since the Link Register
is deliberately non-continous from the other general purpose register
values. To handle this, always translate the value into the internal
format.

diffstat:

 sys/lib/libunwind/DwarfParser.hpp |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff -r 0dc9f86d759a -r 717eb57ea781 sys/lib/libunwind/DwarfParser.hpp
--- a/sys/lib/libunwind/DwarfParser.hpp Tue Feb 23 15:05:08 2021 +0000
+++ b/sys/lib/libunwind/DwarfParser.hpp Tue Feb 23 15:07:32 2021 +0000
@@ -239,7 +239,7 @@
   // Parse data alignment factor
   cieInfo->dataAlignFactor = addressSpace.getSLEB128(p, cieContentEnd);
   // Parse return address register
-  cieInfo->returnAddressRegister = (uint8_t)addressSpace.getULEB128(p, cieContentEnd);
+  cieInfo->returnAddressRegister = R::dwarf2regno((uint8_t)addressSpace.getULEB128(p, cieContentEnd));
   // Parse augmentation data based on augmentation string.
   if (addressSpace.get8(strStart) == 'z') {
     // parse augmentation data length