GDB stub (#1583)

* gdbstub beginnings

* gdbstub: finish gdb impl things, next up is integration with melonDS

* holy fuck the gdbstub works

* gdb breakpoints work, but there's a mysterious crash on continue

* fix memory corruption that sometimes happened, and make resetting the console thru gdb work

* remove some gdb debug printing

* fix things in gdbstub

* separate option for enabling gdbstub

* add mode-dependent CPU registers

* C++ize the GDBstub code

* add gdbstub config in emu settings dialog

* make sure gdb is disabled when jit is enabled

* Remove unnecessary compiler flags, mark ARMJIT assembly code as no-execute-stack

This hardens the binary a little bit against common exploitation methods

* add option to wait for debugger attach on startup

* only insert GNU stack notes on linux

* disable gdbstub enable checkbox when jit is enabled

* fix non-linux incompatibilities

* enable gdbstub by default

* fix issues with gdbstub settings disable stuff

* format stuff

* update gdb test code

* Fix segfault when calling StubCallbacks->GetCPU()

C++ overrides are hard. Please I'm just a lowly C programmer.

* fix packet size not being sent correctly

Thanks to @GlowingUmbreon on Github for troubleshooting this

* fix select(2) calls (i should read docs more properly)

* fix GDB command sequencing/parsing issue (hopefully)

* [GDB] implement no-ack mode

* fix sending ack on handshake

* get lldb to work

1 files changed, 28 insertions, 0 deletions

diff --git a/src/debug/gdb_test/Makefile b/src/debug/gdb_test/Makefile
new file mode 100644
index 0000000..e835795
--- /dev/null
+++ b/src/debug/gdb_test/Makefile
@@ -0,0 +1,28 @@
+
+default: all
+
+all: test-gdb
+
+CPPFLAGS += -Werror=implicit-function-declaration -Werror=int-conversion \
+    -Werror=return-type -Werror=uninitialized \
+    -I../ -I../../ -Og -g -Wall \
+    -Wno-switch -Wno-pointer-sign
+
+obj/:
+	@mkdir -vp "$@"
+
+test-gdb: obj/GdbProto.o obj/GdbStub.o obj/GdbCmds.o obj/main.o obj/CRC32.o
+	$(CXX) $(CPPFLAGS) $(LDFLAGS) -o "$@" $^
+
+obj/Gdb%.o: ../Gdb%.cpp obj/
+	$(CXX) $(CPPFLAGS) -c -o "$@" "$<"
+
+obj/main.o: main.cpp obj/
+	$(CXX) $(CPPFLAGS) -c -o "$@" "$<"
+
+obj/CRC32.o: ../../CRC32.cpp obj/
+	$(CXX) $(CPPFLAGS) -c -o "$@" "$<"
+
+clean:
+	@$(RM) -rv obj/ test-gdb
+