doc: sframe: mention errata 1 of SFrame version 2HEADmaster

With the changes of an added flag SFRAME_F_FDE_FUNC_START_PCREL, s390x
support and new section type SHT_GNU_SFRAME, indicate that this document
specifies the errata 1 of SFrame version 2.  This will help distinguish
the document / specification better from previous releases.

libsframe/doc/
	* sframe-spec.texi: Mention errata 1 of SFrame version 2.

1 files changed, 11 insertions, 9 deletions

diff --git a/libsframe/doc/sframe-spec.texi b/libsframe/doc/sframe-spec.texi
index 7307789..f25791e 100644
--- a/libsframe/doc/sframe-spec.texi
+++ b/libsframe/doc/sframe-spec.texi
@@ -20,7 +20,7 @@ License''.
 
 @titlepage
 @title The SFrame Format
-@subtitle Version 2
+@subtitle Version 2 (Errata 1)
 @sp 15
 @center @today{}
 @author Indu Bhagat
@@ -35,9 +35,9 @@ License''.
 @node Top
 @top The SFrame format
 
-This manual describes version 2 of the SFrame file format.  SFrame stands for
-Simple Frame.  The SFrame format keeps track of the minimal necessary
-information needed for generating stack traces:
+This manual describes version 2 (errata 1) of the SFrame file format.  SFrame
+stands for Simple Frame.  The SFrame format keeps track of the minimal
+necessary information needed for generating stack traces:
 
 @itemize @minus
 @item
@@ -130,9 +130,9 @@ the data structure.
 The above two imply that each SFrame function descriptor entry has a fixed size
 of 20 bytes instead of its size of 17 bytes in SFrame format version 1.
 @item
-Add a new flag SFRAME_F_FDE_FUNC_START_PCREL, as an erratum to SFrame
-Version 2, to indicate the encoding of the SFrame FDE function start address
-field:
+[Errata 1] Add a new flag SFRAME_F_FDE_FUNC_START_PCREL, as an erratum to
+SFrame Version 2, to indicate the encoding of the SFrame FDE function start
+address field:
  @itemize @minus
   @item if set, @code{sfde_func_start_address} field contains the offset in
 bytes to the start PC of the associated function from the field itself.
@@ -141,8 +141,8 @@ bytes to the start PC of the associated function from the start of the SFrame
 section.
  @end itemize
 @item
-Add a new ABI/arch identifier SFRAME_ABI_S390X_ENDIAN_BIG for the s390
-architecture (64-bit) s390x ABI.  Other s390x-specific backward compatible
+[Errata 1] Add a new ABI/arch identifier SFRAME_ABI_S390X_ENDIAN_BIG for the
+s390 architecture (64-bit) s390x ABI.  Other s390x-specific backward compatible
 changes including the following helper definitions have been incrementally
 added to SFrame version 2 only:
  @itemize @minus
@@ -165,6 +165,8 @@ CFA offset adjustment and then scale down by CFA offset alignment factor).
   @item SFRAME_V2_S390X_CFA_OFFSET_DECODE: Decode CFA offset (i.e., scale up
 by CFA offset alignment factor and then revert CFA offset adjustment).
  @end itemize
+@item
+[Errata 1] An ELF SFrame section has the type SHT_GNU_SFRAME.
 @end itemize
 
 SFrame version 1 is now obsolete and should not be used.