[binutils-gdb] Support for a new pacbti unwind opcode.

[Alan Modra]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=09854a8870e63bd0d976d4d0dd7bd6b9b91348b1

commit 09854a8870e63bd0d976d4d0dd7bd6b9b91348b1
Author: Tejas Belagod <tejas.belagod@arm.com>
Date:   Tue Oct 5 08:43:12 2021 +0000

    Support for a new pacbti unwind opcode.
    
    This patch adds readelf support for decoding the exception table
    opcode for restoring the RA_AUTH_CODE pseudo register defined by the
    EHABI
    (https://github.com/ARM-software/abi-aa/releases/download/2021Q1/ehabi32.pdf
    Section 10.3).
    
            * readelf.c (decode_arm_unwind_bytecode): Add support to decode
            restoring RA_AUTH_CODE pseudo register.

Diff:
---
 binutils/readelf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 682eacdef14..1fa7ef45708 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -9419,6 +9419,8 @@ decode_arm_unwind_bytecode (Filedata *                 filedata,
 	    printf ("-D%d", first + last);
 	  printf ("}");
 	}
+      else if (op == 0xb4)
+	printf (_("     pop {ra_auth_code}"));
       else if ((op & 0xf8) == 0xb8 || (op & 0xf8) == 0xd0)
 	{
 	  unsigned int count = op & 0x07;