On AArch64 systems with pointer authentication enabled, one needs to
know the PAC mask in order to unwind functions that employ PAC.
This patch extends dwfl_thread_state_registers to handle the PAC mask
information by introducing a special register -2. (-1 is used in a
similar manner already for h
We need to read the PAC mask from a core file when debugging offline
as the information is still needed to demangle return addresses.
This commit pulls out the NT_ARM_PAC_MASK info from the core and feeds
it through to dwfl_thread_state_registers for each thread.
Signed-off-by: Steve Capper
---
From: German Gomez
Demangle mangled return addresses on AARCH64. The value of the masks is
stored in the struct Dwfl_Thread.
Signed-off-by: German Gomez
[SteveC: remove dwfl_thread_state_aarch64_pauth]
Signed-off-by: Steve Capper
---
libdwfl/dwfl_frame.c | 3 +++
libdwfl/frame_unwind.c | 1
From: German Gomez
Implement DW_CFA_AARCH64_negate_ra_state in accordance with the DWARF
AARCH64 ABI [1].
Followup commits will use the value of this register to remove the PAC
from return addresses.
[1]
https://github.com/ARM-software/abi-aa/blob/main/aadwarf64/aadwarf64.rst#44call-frame-inst
From: German Gomez
This register will be used to indicate whether a return address is
mangled with a PAC or not, in accordance with the DWARF AARCH64 ABI [1].
[1]
https://github.com/ARM-software/abi-aa/blob/main/aadwarf64/aadwarf64.rst#41dwarf-register-names
Signed-off-by: German Gomez
[Steve
Hello,
This series enables Pointer Authentication (PAC) support in elfutils.
The first three patches were originally posted by German Gomez. I've
rewritten a new patch to extend the dwfl_thread_state_registers function
to handle the PAC mask and added an extra patch that was required to
debug core
