[PATCH 1/1] aarch64: fix a crash during maintenance print cooked-registers

[Klaus Gerlicher <klaus.gerlicher@intel.com>]

Hi all, Luis,

I found this accidently while looking at Thiago's GDBserver improvements. Luis
I think added the pseudo register in question, so maybe he can comment
on this issue. I used a aarch64 qemu 9.2.

Thanks
Klaus

On aarch64 with pauth enabled I can see a crash when
using "maintenance print cooked-registers".

This happens because the register dump code tries to read
a pseudo reg that is not handled here because it is supposedly
only used in unwinding.

Fix this by returning a zero value typed as a built-in uint64.
---
 gdb/aarch64-tdep.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 840f9877361..6e712b12b86 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -3290,6 +3290,9 @@ aarch64_pseudo_read_value (gdbarch *gdbarch, const frame_info_ptr &next_frame,
     return aarch64_pseudo_read_value_1 (next_frame, pseudo_reg_num,
 					pseudo_offset - AARCH64_SVE_V0_REGNUM);
 
+  if (tdep->has_pauth () && pseudo_reg_num == tdep->ra_sign_state_regnum)
+    return value::zero (builtin_type (gdbarch)->builtin_uint64, lval_register);
+
   gdb_assert_not_reached ("regnum out of bound");
 }
 
-- 
2.34.1

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