[binutils-gdb] sframe: doc: update documentation for pauth key in SFrame FDE

[Indu Bhagat]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2440ed038a23d879b536ae14af7c0657e01f998c

commit 2440ed038a23d879b536ae14af7c0657e01f998c
Author: Indu Bhagat <indu.bhagat@oracle.com>
Date:   Thu Dec 22 09:58:21 2022 -0800

    sframe: doc: update documentation for pauth key in SFrame FDE
    
    ChangeLog:
    
            * libsframe/doc/sframe-spec.texi

Diff:
---
 libsframe/doc/sframe-spec.texi | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libsframe/doc/sframe-spec.texi b/libsframe/doc/sframe-spec.texi
index fa66d801dd3..345b8f93036 100644
--- a/libsframe/doc/sframe-spec.texi
+++ b/libsframe/doc/sframe-spec.texi
@@ -398,10 +398,16 @@ The info word is a bitfield split into three parts.  >From MSB to LSB:
 
 @multitable {Bit offset} {@code{isroot}} {Length of variable-length data for this type (some kinds only).}
 @headitem Bit offset @tab Name @tab Description
-@item 7--5
+@item 7--6
 @tab @code{unused}
 @tab Unused bits.
 
+@item 5
+@tab @code{pauth_key}
+@tab Specify which key is used for signing the return addresses in the SFrame
+FDE.  Two possible values: SFRAME_AARCH64_PAUTH_KEY_A (0) or
+SFRAME_AARCH64_PAUTH_KEY_B (1).
+
 @item 4
 @tab @code{fdetype}
 @tab SFRAME_FDE_TYPE_PCMASK (1) or SFRAME_FDE_TYPE_PCINC (0). @xref{The SFrame FDE types}.