GDB: doc: Improve AArch64 and ARM subsubsection titles in gdb.texinfo

Fix a couple of issues with the subsubsection titles in the AArch64
configuration-specific subsection:

1. They all start with "AArch64", which IMHO is redundant information.
2. They all end with a period, which looks strange to me.

Also, fix a couple of issues with their @cindex tags:

1. Some of them also end with a period, which I don't think is common
practice.
2. Sometimes there are tags for the feature abbreviation, and sometimes
there aren't. Add them if they're missing.

Similarly, in the Target Description section, under the Standard Target
Features subsection, the subsubsection titles for the AArch64 and ARM
features have the word "feature" in the title and the AArch64 ones have
the word "AArch64".  Remove them.

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index b9fc160a17180f0f2fe70c87a916d8f5433275ac..9c825685cb2a21e159ace3b1a800c9f8e72768c3 100644 (file)
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -26630,8 +26630,9 @@ Show whether AArch64 debugging messages are displayed.
 
 @end table
 
-@subsubsection AArch64 SVE.
-@cindex AArch64 SVE.
+@subsubsection Scalable Vector Extension
+@cindex AArch64 SVE
+@cindex AArch64 Scalable Vector Extension
 
 When @value{GDBN} is debugging the AArch64 architecture, if the Scalable Vector
 Extension (SVE) is present, then @value{GDBN} will provide the vector registers
@@ -26670,7 +26671,7 @@ internally by @value{GDBN} and the Linux Kernel.
 
 @end itemize
 
-@subsubsection AArch64 SME.
+@subsubsection Scalable Matrix Extension
 @anchor{AArch64 SME}
 @cindex SME
 @cindex AArch64 SME
@@ -26866,7 +26867,7 @@ incorrect values for SVE registers (when in streaming mode).
 This is the same limitation we have for the @acronym{SVE} registers, and there
 are plans to address this limitation going forward.
 
-@subsubsection AArch64 SME2.
+@subsubsection Scalable Matrix Extension 2
 @anchor{AArch64 SME2}
 @cindex SME2
 @cindex AArch64 SME2
@@ -26910,8 +26911,9 @@ For more information about @acronym{SME2}, please refer to the
 official @url{https://developer.arm.com/documentation/ddi0487/latest,
 architecture documentation}.
 
-@subsubsection AArch64 Pointer Authentication.
-@cindex AArch64 Pointer Authentication.
+@subsubsection Pointer Authentication
+@cindex AArch64 PAC
+@cindex AArch64 Pointer Authentication
 @anchor{AArch64 PAC}
 
 When @value{GDBN} is debugging the AArch64 architecture, and the program is
@@ -26921,8 +26923,9 @@ When GDB prints a backtrace, any addresses that required unmasking will be
 postfixed with the marker [PAC].  When using the MI, this is printed as part
 of the @code{addr_flags} field.
 
-@subsubsection AArch64 Memory Tagging Extension.
-@cindex AArch64 Memory Tagging Extension.
+@subsubsection Memory Tagging Extension
+@cindex AArch64 MTE
+@cindex AArch64 Memory Tagging Extension
 
 When @value{GDBN} is debugging the AArch64 architecture, the program is
 using the v8.5-A feature Memory Tagging Extension (MTE) and there is support
@@ -49330,7 +49333,7 @@ registers using the capitalization used in the description.
 @subsection AArch64 Features
 @cindex target descriptions, AArch64 features
 
-@subsubsection AArch64 core registers feature
+@subsubsection Core registers
 
 The @samp{org.gnu.gdb.aarch64.core} feature is required for AArch64
 targets.  It must contain the following:
@@ -49358,7 +49361,7 @@ aarch64-core.xml file.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection AArch64 floating-point registers feature
+@subsubsection Floating-point registers
 
 The @samp{org.gnu.gdb.aarch64.fpu} feature is optional.  If present,
 it must contain the following registers:
@@ -49384,7 +49387,7 @@ be found in the aarch64-fpu.xml file.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection AArch64 SVE registers feature
+@subsubsection SVE registers
 
 The @samp{org.gnu.gdb.aarch64.sve} feature is optional.  If present,
 it means the target supports the Scalable Vector Extension and must contain
@@ -49438,7 +49441,7 @@ aarch64-sve.c file, and should match what is described in aarch64-fpu.xml.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection AArch64 Pointer Authentication registers feature
+@subsubsection Pointer Authentication registers
 
 The @samp{org.gnu.gdb.aarch64.pauth} optional feature was introduced so
 @value{GDBN} could detect support for the Pointer Authentication
@@ -49505,7 +49508,7 @@ Authentication support via the @samp{org.gnu.gdb.aarch64.pauth} feature string
 and also report additional registers the older @value{GDBN} does not know
 about, potentially leading to a crash.
 
-@subsubsection AArch64 TLS registers feature
+@subsubsection TLS registers
 
 The @samp{org.gnu.gdb.aarch64.tls} optional feature was introduced to expose
 the TLS registers to @value{GDBN}.  If present, it must contain either one
@@ -49541,7 +49544,7 @@ determined dynamically at runtime.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection AArch64 MTE registers feature
+@subsubsection MTE registers
 
 The @samp{org.gnu.gdb.aarch64.mte} optional feature was introduced so
 @value{GDBN} could detect support for the Memory Tagging Extension and
@@ -49562,7 +49565,7 @@ This restriction may be lifted in the future.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection AArch64 SME registers feature
+@subsubsection SME registers
 
 The @samp{org.gnu.gdb.aarch64.sme} feature is optional.  If present,
 it should contain registers @code{ZA}, @code{SVG} and @code{SVCR}.
@@ -49596,7 +49599,7 @@ Extra registers are allowed in this feature, but they will not affect
 The @samp{org.gnu.gdb.aarch64.sme} feature is required when the target also
 reports support for the @samp{org.gnu.gdb.aarch64.sme2} feature.
 
-@subsubsection AArch64 SME2 registers feature
+@subsubsection SME2 registers
 
 The @samp{org.gnu.gdb.aarch64.sme2} feature is optional.  If present,
 then the @samp{org.gnu.gdb.aarch64.sme} feature must also be present.  The
@@ -49724,7 +49727,7 @@ configurations that are meaningful to M-profiles.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection FPA registers feature (obsolete)
+@subsubsection FPA registers (obsolete)
 
 The @samp{org.gnu.gdb.arm.fpa} feature is obsolete and should not be
 advertised by debugging stubs anymore.  It used to advertise registers for
@@ -49779,7 +49782,7 @@ contents.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection XScale iwMMXt feature
+@subsubsection XScale iwMMXt
 
 The XScale @samp{org.gnu.gdb.xscale.iwmmxt} feature is optional.  If present,
 it must contain the following:
@@ -49813,7 +49816,7 @@ This feature should only be reported if the target is XScale.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection Vector Floating-Point (VFP) feature
+@subsubsection Vector Floating-Point (VFP)
 
 The @samp{org.gnu.gdb.arm.vfp} feature is optional.  If present, it
 should contain one of two possible sets of values depending on whether
@@ -49848,7 +49851,7 @@ registers as pseudo-registers.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection NEON architecture feature
+@subsubsection NEON architecture
 
 The @samp{org.gnu.gdb.arm.neon} feature is optional.  It does not
 need to contain registers; it instructs @value{GDBN} to display the
@@ -49860,7 +49863,7 @@ be present and include 32 double-precision registers.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection M-profile Pointer Authentication and Branch Target Identification feature
+@subsubsection M-profile Pointer Authentication and Branch Target Identification
 
 The @samp{org.gnu.gdb.arm.m-profile-pacbti} feature is optional, and
 acknowledges support for the ARMv8.1-m PACBTI extensions.
@@ -49877,7 +49880,7 @@ AArch64's PAC extension.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection M-profile system registers feature
+@subsubsection M-profile system registers
 
 The @samp{org.gnu.gdb.arm.m-system} optional feature was introduced as a way to
 inform @value{GDBN} about additional system registers.
@@ -49900,7 +49903,7 @@ sees this feature, it will attempt to track the values of @samp{msp} and
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection M-profile Security Extensions feature
+@subsubsection M-profile Security Extensions
 
 The @samp{org.gnu.gdb.arm.secext} optional feature was introduced so
 @value{GDBN} could better support the switching of stack pointers and
@@ -49930,7 +49933,7 @@ unwinding when applications switch between security states.
 Extra registers are allowed in this feature, but they will not affect
 @value{GDBN}.
 
-@subsubsection TLS registers feature
+@subsubsection TLS registers
 
 The optional @samp{org.gnu.gdb.arm.tls} feature contains TLS registers.