emudbg: use autoconf and provide static lib to build on mingw

This is the last commit to bring feature parity between Linux/macOS and
mingw build (windows 10 + WSL)

Resolves: #3

debugger/COPYING

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+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+
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+
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debugger/ChangeLog

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+2018-10-29  Damien Ciabrini  <damien.ciabrini@gmail.com>
+
+	* Initial version, to allow basic instrumentation.
+

debugger/Makefile.am

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+SUBDIRS = src
+
+pkgconfig_DATA = emudbg.pc

debugger/README

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+emudbg - emulator-agnostic source-level debugging API
+Copyright (c) 2015-2018 Damien Ciabrini
+
+emudbg defines a simple debugging API that can be implemented by
+emulators to expose simple step-by-step execution and memory
+inspection capabilities over a standard GDB remote serial protocol [1]
+
+emudbg implements a generic RSP server that can be targeted by any
+debugger implementing the GDB remote serial protocol. It controls
+the execution of the emulated software by calling the debugging API
+whose implementation has to be provided by the emulator.
+
+[1] https://sourceware.org/gdb/onlinedocs/gdb/Remote-Protocol.html

debugger/configure.ac

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+AC_INIT([libemudbg], [0.2])
+AC_CANONICAL_TARGET
+AM_INIT_AUTOMAKE([-Wall])
+PKG_INSTALLDIR
+AC_PROG_CC
+AM_PROG_AR
+AC_PROG_RANLIB
+
+case $target_os in
+    *mingw*)
+    EMUDBG_PKGLIB="$EMUDBG_PKGLIB -lws2_32"
+    ;;
+esac
+
+dnl AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_FILES([
+ emudbg.pc
+ Makefile
+ src/Makefile
+])
+AC_SUBST(EMUDBG_PKGLIB)
+AC_OUTPUT

debugger/emudbg.pc.in

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+# emudbg pkg-config source file
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: emudbg
+Description: emulator-agnostic source level debugging API and server
+Version: @VERSION@
+Requires:
+Conflicts:
+Libs: -L${libdir} -lemudbg @EMUDBG_PKGLIB@
+Cflags: -I${includedir}

debugger/src/Makefile.am

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+lib_LIBRARIES = libemudbg.a
+libemudbg_a_SOURCES = emudbg.c gdbserver.c
+
+include_HEADERS = emudbg.h

debugger/src/emudbg.c

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+/*
+ * emudbg - emulator-agnostic source level debugging API
+ * Copyright (c) 2015-2018 Damien Ciabrini
+ * This file is part of ngdevkit
+ *
+ * ngdevkit is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ngdevkit is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with ngdevkit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "emudbg.h"
+#include "emudbg_ctx.h"
+#include "gdbserver.h"
+
+#if defined(__WIN32__)
+#include <ws2tcpip.h>
+#define IOCTL ioctlsocket
+#define BYTES_AVAIL_T u_long
+#define NO_SOCKET_YET INVALID_SOCKET
+#else
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#define IOCTL ioctl
+#define BYTES_AVAIL_T int
+#define NO_SOCKET_YET 0
+#endif
+
+#define DEFAULT_HOST "127.0.0.1"
+#define DEFAULT_PORT 2159
+
+int emudbg_init(struct emudbg_api_t *impl, void **emudbg_ctx)
+{
+#if defined(__WIN32__)
+    WORD version;
+    WSADATA data;
+    version = MAKEWORD(2, 2);
+
+    int err = WSAStartup(version, &data);
+    if (err != 0) { return 1; }
+#endif
+
+    struct emudbg_ctx_t *ctx = malloc(sizeof(struct emudbg_ctx_t));
+    ctx->listen_socket = NO_SOCKET_YET;
+    ctx->client_socket = NO_SOCKET_YET;
+    memset(ctx->data, 0, sizeof(ctx->data));
+    memset(ctx->send_data, 0, sizeof(ctx->send_data));
+    ctx->next_cmd_ptr = NULL;
+    ctx->debugger_impl = impl;
+
+    *emudbg_ctx = ctx;
+
+    return 0;
+}
+
+
+int emudbg_wait_for_client(void *emudbg_ctx)
+{
+    struct emudbg_ctx_t *ctx=(struct emudbg_ctx_t*)emudbg_ctx;
+
+    struct sockaddr_in listen_addr;
+    int r=0;
+    listen_addr.sin_family = AF_INET;
+    listen_addr.sin_addr.s_addr = inet_addr(DEFAULT_HOST);
+    listen_addr.sin_port = htons(DEFAULT_PORT);
+
+    ctx->listen_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+    r=bind(ctx->listen_socket, (struct sockaddr *)&listen_addr, sizeof(listen_addr));
+    // printf("BOUND SOCKET: %x - %d (errno: %d)\n", ctx->listen_socket, r, EMUDBG_SOCKET_ERRNO);
+
+    // printf("LISTEN:\n");
+    r=listen(ctx->listen_socket, SOMAXCONN);
+    // printf("LISTEN FINISHED: %d (errno: %d) - %d\n", r, EMUDBG_SOCKET_ERRNO, SOCKET_ERROR);
+
+    struct sockaddr client_addr;
+    socklen_t addrlen=sizeof(client_addr);
+    ctx->client_socket = accept(ctx->listen_socket, &client_addr, &addrlen);
+    // printf("ACCEPTED CLIENT SOCKET: %x (errno: %d)\n", ctx->client_socket, EMUDBG_SOCKET_ERRNO);
+
+}
+
+
+int emudbg_client_command_pending(void *emudbg_ctx)
+{
+    struct emudbg_ctx_t *ctx=(struct emudbg_ctx_t*)emudbg_ctx;
+
+    BYTES_AVAIL_T bytes_avail=0;
+    if (ctx->client_socket != FD_NONE) {
+        IOCTL(ctx->client_socket, FIONREAD, &bytes_avail);
+        if (bytes_avail>0) {
+	  // printf("bytes avail: %d\n",bytes_avail);
+        }
+    }
+    return bytes_avail>0;
+}
+
+
+int emudbg_server_loop(void *emudbg_ctx, int emu_suspended, struct emudbg_cmd_t *next_cmd)
+{
+    return emudbg_gdb_server_loop(emudbg_ctx, emu_suspended, next_cmd);
+}
+
+
+void emudbg_disconnect_from_client(void *emudbg_ctx)
+{
+    struct emudbg_ctx_t *ctx=(struct emudbg_ctx_t*)emudbg_ctx;
+
+    close(ctx->client_socket);
+    ctx->client_socket;
+    close(ctx->listen_socket);
+    ctx->listen_socket;
+
+    free(ctx);
+}