Apple M-Series Fixes

.clang-format-ignore

@@ -0,0 +1,2 @@
+# 3rd party libs
+lib/debugbreak.h

.github/workflows/build.yml

@@ -23,10 +23,8 @@ jobs:
     - name: Install macOS dependencies
       if: ${{ matrix.os.preset == 'mac' }}
       run: |
-        # Note this is x86_64 Homebrew
-        /usr/local/bin/brew install sdl12-compat sdl2_image
-        curl --output-dir /tmp -fsSLO https://github.com/XQuartz/XQuartz/releases/download/XQuartz-2.8.5/XQuartz-2.8.5.pkg
-        sudo installer -pkg /tmp/XQuartz-2.8.5.pkg -target LocalSystem
+        # Install packages from Homebrew
+        brew bundle install
 
     - name: Configure CMake
       run: cmake --preset ${{matrix.os.preset}} -B ${{github.workspace}}/build

Brewfile

@@ -0,0 +1,9 @@
+# Homebrew dependencies to build Descent3
+
+# XQuartz required for OpenGL and glx.h (not included in Xcode)
+tap "homebrew/cask"
+cask "xquartz"
+
+# SDL
+brew "sdl12-compat"
+brew "sdl2_image"

CMakeLists.txt

@@ -5,9 +5,6 @@ MARK_AS_ADVANCED(CMAKE_BACKWARDS_COMPATIBILITY)
 # allow more human readable "if then else" constructs
 SET( CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS TRUE )
 
-# TODO: Apple Silicon (arm64) later
-SET( CMAKE_OSX_ARCHITECTURES x86_64 CACHE STRING "" FORCE)
-
 
 PROJECT(Descent3)
 

lib/debug.h

@@ -153,37 +153,13 @@ void Debug_ConsoleRedirectMessages(int virtual_window, int physical_window);
 //	DEBUGGING MACROS
 // Break into the debugger, if this feature was enabled in Debug_init()
 #if !defined(RELEASE)
+#include "debugbreak.h"
 #if defined(WIN32)
-#define debug_break()                                                                                                  \
-  do {                                                                                                                 \
-    if (Debug_break)                                                                                                   \
-      __asm int 3                                                                                                      \
-  } while (0)
 #elif defined(__LINUX__)
 void ddio_InternalKeyClose();
-// #define debug_break() do{__asm__ __volatile__ ( "int $3" );}while(0)
-#ifndef MACOSXPPC
-#define debug_break()                                                                                                  \
-  do {                                                                                                                 \
-    ddio_InternalKeyClose();                                                                                           \
-    __asm__ __volatile__("int $3");                                                                                    \
-  } while (0)
-#else
-#define debug_break()                                                                                                  \
-  do {                                                                                                                 \
-    ddio_InternalKeyClose(); /*nop*/                                                                                   \
-  } while (0)
-#endif
 #elif defined(MACINTOSH)
 extern void SuspendControls();
 extern void ResumeControls();
-#define debug_break()                                                                                                  \
-  do {                                                                                                                 \
-    if (Debug_break)                                                                                                   \
-      SuspendControls();                                                                                               \
-    Debugger();                                                                                                        \
-    ResumeControls();                                                                                                  \
-  } while (0)
 #else
 #define debug_break()
 #endif

lib/debugbreak.h

@@ -0,0 +1,174 @@
+/* Copyright (c) 2011-2021, Scott Tsai
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef DEBUG_BREAK_H
+#define DEBUG_BREAK_H
+
+#ifdef _MSC_VER
+
+#define debug_break __debugbreak
+
+#else
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEBUG_BREAK_USE_TRAP_INSTRUCTION 1
+#define DEBUG_BREAK_USE_BULTIN_TRAP      2
+#define DEBUG_BREAK_USE_SIGTRAP          3
+
+#if defined(__i386__) || defined(__x86_64__)
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__inline__ static void trap_instruction(void)
+{
+	__asm__ volatile("int $0x03");
+}
+#elif defined(__thumb__)
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+/* FIXME: handle __THUMB_INTERWORK__ */
+__attribute__((always_inline))
+__inline__ static void trap_instruction(void)
+{
+	/* See 'arm-linux-tdep.c' in GDB source.
+	 * Both instruction sequences below work. */
+#if 1
+	/* 'eabi_linux_thumb_le_breakpoint' */
+	__asm__ volatile(".inst 0xde01");
+#else
+	/* 'eabi_linux_thumb2_le_breakpoint' */
+	__asm__ volatile(".inst.w 0xf7f0a000");
+#endif
+
+	/* Known problem:
+	 * After a breakpoint hit, can't 'stepi', 'step', or 'continue' in GDB.
+	 * 'step' would keep getting stuck on the same instruction.
+	 *
+	 * Workaround: use the new GDB commands 'debugbreak-step' and
+	 * 'debugbreak-continue' that become available
+	 * after you source the script from GDB:
+	 *
+	 * $ gdb -x debugbreak-gdb.py <... USUAL ARGUMENTS ...>
+	 *
+	 * 'debugbreak-step' would jump over the breakpoint instruction with
+	 * roughly equivalent of:
+	 * (gdb) set $instruction_len = 2
+	 * (gdb) tbreak *($pc + $instruction_len)
+	 * (gdb) jump   *($pc + $instruction_len)
+	 */
+}
+#elif defined(__arm__) && !defined(__thumb__)
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__attribute__((always_inline))
+__inline__ static void trap_instruction(void)
+{
+	/* See 'arm-linux-tdep.c' in GDB source,
+	 * 'eabi_linux_arm_le_breakpoint' */
+	__asm__ volatile(".inst 0xe7f001f0");
+	/* Known problem:
+	 * Same problem and workaround as Thumb mode */
+}
+#elif defined(__aarch64__) && defined(__APPLE__)
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_BULTIN_DEBUGTRAP
+#elif defined(__aarch64__)
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__attribute__((always_inline))
+__inline__ static void trap_instruction(void)
+{
+	/* See 'aarch64-tdep.c' in GDB source,
+	 * 'aarch64_default_breakpoint' */
+	__asm__ volatile(".inst 0xd4200000");
+}
+#elif defined(__powerpc__)
+	/* PPC 32 or 64-bit, big or little endian */
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__attribute__((always_inline))
+__inline__ static void trap_instruction(void)
+{
+	/* See 'rs6000-tdep.c' in GDB source,
+	 * 'rs6000_breakpoint' */
+	__asm__ volatile(".4byte 0x7d821008");
+
+	/* Known problem:
+	 * After a breakpoint hit, can't 'stepi', 'step', or 'continue' in GDB.
+	 * 'step' stuck on the same instruction ("twge r2,r2").
+	 *
+	 * The workaround is the same as ARM Thumb mode: use debugbreak-gdb.py
+	 * or manually jump over the instruction. */
+}
+#elif defined(__riscv)
+	/* RISC-V 32 or 64-bit, whether the "C" extension
+	 * for compressed, 16-bit instructions are supported or not */
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__attribute__((always_inline))
+__inline__ static void trap_instruction(void)
+{
+	/* See 'riscv-tdep.c' in GDB source,
+	 * 'riscv_sw_breakpoint_from_kind' */
+	__asm__ volatile(".4byte 0x00100073");
+}
+#else
+	#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_SIGTRAP
+#endif
+
+
+#ifndef DEBUG_BREAK_IMPL
+#error "debugbreak.h is not supported on this target"
+#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_TRAP_INSTRUCTION
+__attribute__((always_inline))
+__inline__ static void debug_break(void)
+{
+	trap_instruction();
+}
+#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_BULTIN_DEBUGTRAP
+__attribute__((always_inline))
+__inline__ static void debug_break(void)
+{
+	__builtin_debugtrap();
+}
+#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_BULTIN_TRAP
+__attribute__((always_inline))
+__inline__ static void debug_break(void)
+{
+	__builtin_trap();
+}
+#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_SIGTRAP
+#include <signal.h>
+__attribute__((always_inline))
+__inline__ static void debug_break(void)
+{
+	raise(SIGTRAP);
+}
+#else
+#error "invalid DEBUG_BREAK_IMPL value"
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ifdef _MSC_VER */
+
+#endif /* ifndef DEBUG_BREAK_H */

lib/linux/linux_fix.h

@@ -2,6 +2,7 @@
 #define __LINUX_FIX_H_
 
 #include <sys/stat.h>
+#include <math.h>
 
 #define LOKI_VERSION ""
 
@@ -46,7 +47,11 @@ inline int _filelength(int fd) {
 #define strcmpi(a, b) stricmp(a, b)
 #define strcmpni(a, b, c) strnicmp(a, b, c)
 #define _chmod(a, b) chmod(a, b)
+#if defined(__arm64__)
+#define _finite(a) isfinite(a)
+#else
 #define _finite(a) finite(a)
+#endif
 #define _min(a, b) min(a, b)
 #define _max(a, b) max(a, b)
 #define __min(a, b) min(a, b)

libmve/mveasm.cpp

@@ -2054,7 +2054,9 @@ void MVE_gfxWaitRetrace(int state);
 void MVE_gfxSetSplit(unsigned line);
 
 #if defined(__LINUX__)
-#ifndef MACOSXPPC
+
+#if !defined(MACOSXPPC) && !defined(__arm64__)
+
 #define int3 __asm__ __volatile__("int $3");
 #else
 #define int3