Fix all build warnings.

.gitignore

@@ -1,29 +1,7 @@
-# LaTeX intermediate files
-*.aux
-*.idx
-*.ilg
-*.ind
-*.lof
-*.log
-*.out
-*.toc
-*.lot
-*.hst
-*.ver
-
 # Generated files
-*_registers.tex
-*_registers.tex.inc
-*_registers.h
-serial.*
-abstract_commands.*
 build/*.adoc
+build/images
+build/.asciidoctor
+build/*.pdf
 
-# Changelogs
-changelog.tex
-vc.tex
-
-# Resulting PDFs
-riscv-debug-workgroup-notes.pdf
-
-.vscode
+.vscode

Sdext.adoc

@@ -158,7 +158,9 @@ time to complete.
 This mechanism cleanly supports a system which supports multiple
 privilege levels, where the OS or a debug stub runs in M-Mode while the
 program being debugged runs in a less privileged mode. Systems that only
-support M-Mode can use {csr-icount} as well, but count must be able to count several instructions (depending on the software implementation). See [[nativestep]].
+support M-Mode can use {csr-icount} as well, but count must be able to count
+several instructions (depending on the software implementation). See
+xref:nativestep[].
 
 === Reset
 

debug_module.adoc

@@ -449,6 +449,10 @@ what it can do with the program buffer.
 passed through by a hart during run/halt debugging as influenced by the
 different fields of {dm-dmcontrol}, {dm-abstractcs}, <<abstractauto>>, and {dm-command}.
 
+[[abstract_sm]]
+.Run/Halt Debug State Machine for single-hart hardware platforms. As only a small amount of state is visible to the debugger, the states and transitions are conceptual.
+image::./fig/abstract_commands.png[]
+
 [[systembusaccess]]
 === System Bus Access
 
@@ -492,10 +496,6 @@ improve performance when accessing memory. Third, it may provide access
 to devices that a hart does not have access to.
 ====
 
-[[abstract_sm]]
-.Run/Halt Debug State Machine for single-hart hardware platforms. As only a small amount of state is visible to the debugger, the states and transitions are conceptual.
-image::abstract_commands.svg[]
-
 === Minimally Intrusive Debugging
 
 Depending on the task it is performing, some harts can only be halted