initial dreamcast build system

Makefile

@@ -1,34 +1,7 @@
 %.csv: %.ods
 	libreoffice --headless --convert-to csv:"Text - txt - csv (StarCalc)":44,34,76,,,,true --outdir $(dir $@) $<
 
-%.class: %.java
+include java.mk
-	javac $<
-
-java/lang/%.class: java/lang/%.java
-	javac --source 8 --target 8 --boot-class-path . $<
-
-OBJ = \
-	c/decode.o \
-	c/class_file.o \
-	c/debug_class_file.o \
-	c/malloc.o \
-	c/file.o \
-	c/execute.o \
-	c/memory_allocator.o \
-	c/class_resolver.o \
-	c/hash_table.o \
-	c/frame.o \
-	c/printf.o \
-	c/parse.o \
-	c/unparse.o
-
-MAIN_OBJ = \
-	$(OBJ) \
-	c/main.o
-
-PRINT_CLASS_OBJ = \
-	$(OBJ) \
-	c/print_class.o \
 
 CC ?= gcc
 ARCH = -m32
@@ -39,10 +12,10 @@ DEPFLAGS = -MMD -MP
 %.o: %.c
 	$(CC) $(ARCH) $(CFLAGS) $(OPT) $(DEPFLAGS) -MF ${<}.d -c $< -o $@
 
-print_class: $(PRINT_CLASS_OBJ)
+print_class: $(OBJ) $(PRINT_CLASS_OBJ)
 	$(CC) $(ARCH) $^ -o $@
 
-main: $(MAIN_OBJ)
+main: $(OBJ) $(MAIN_HOSTED_OBJ)
 	$(CC) $(ARCH) $^ -o $@
 
 clean:

Makefile.dreamcast.mk

@@ -0,0 +1,51 @@
+all: $(patsubst %.cpp,%.elf,$(wildcard example/*.cpp))
+
+OPT = -O0
+
+MAKEFILE_PATH := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
+LIB ?= $(MAKEFILE_PATH)/dreamcast
+CFLAGS += -D__dreamcast__ -DDEBUG
+CFLAGS += -I$(MAKEFILE_PATH)
+CFLAGS += -I$(MAKEFILE_PATH)/dreamcast/
+CARCH = -m4-single -ml
+
+include dreamcast/base.mk
+include dreamcast/common.mk
+include dreamcast/headers.mk
+
+include java.mk
+
+%.class.o: %.class
+	$(BUILD_BINARY_O)
+
+%.class.h: %.class
+	$(BUILD_BINARY_H)
+
+libgcc/%.o: $(LIBGCC)
+	@mkdir -p $(dir $@)
+	ar x --output $(dir $@) $(LIBGCC) $(notdir $@)
+	sh4-none-elf-objdump -t $@ \
+		| grep -E '[.]hidden' \
+		| grep -vE 'UND' \
+		| cut -d' ' -f10 \
+		| xargs rebind --visibility=default $@
+
+LIBGCC_OBJ = \
+	libgcc/_divdi3.o \
+	libgcc/_udiv_qrnnd_16.o \
+	libgcc/_clz.o \
+	libgcc/_moddi3.o \
+	libgcc/_fixdfdi.o \
+	libgcc/_fixunsdfdi.o \
+	libgcc/_fixunssfdi.o \
+	libgcc/_floatdisf.o \
+	libgcc/_floatdidf.o \
+	libgcc/_sdivsi3.o \
+	libgcc/_fixsfdi.o \
+	libgcc/_div_table.o
+
+CLASS_FILES = \
+	p/Multiply.class.o
+
+main.elf: LDSCRIPT = $(LIB)/main.lds
+main.elf: $(START_OBJ) $(OBJ) $(MAIN_OBJ) $(MAIN_DREAMCAST_OBJ) $(LIBGCC_OBJ) $(CLASS_FILES)

c/assert.h

@@ -1,11 +1,7 @@
 #pragma once
 
-#if defined(__linux__)
+#if defined(__dreamcast__)
-#include "assert_hosted.h"
-#elif defined(_WIN32)
-#include "assert_hosted.h"
-#elif defined(__APPLE__)
-#include "assert_hosted.h"
-#else
 #include "assert_dreamcast.h"
+#else
+#include "assert_hosted.h"
 #endif

c/assert_dreamcast.h

@@ -1,3 +1,11 @@
 #pragma once
 
-#define assert(b)
+#include "printf.h"
+
+#define assert(b)                                                       \
+  do {                                                                  \
+    if (!(b)) {                                                         \
+      printf("%s:%d %s: assertion `%s` failed\n", __FILE__, __LINE__, __func__, #b); \
+      while (1);                                                        \
+    }                                                                   \
+  } while (0);

c/class_resolver.c

@@ -147,9 +147,9 @@ static void class_resolver_allocate_attribute_entry(struct class_entry * class_e
   class_entry->attribute_entry = attribute_entry;
 }
 
-struct hash_table_entry * class_resolver_load_from_buffers(const uint8_t * class_names[],
+struct hash_table_entry * class_resolver_load_from_buffers(const uint8_t ** class_names,
-                                                           const int class_names_length[],
+                                                           const int * class_names_length,
-                                                           uint8_t * buffers[],
+                                                           const uint8_t ** buffers,
                                                            int length,
                                                            int * hash_table_length)
 {

c/class_resolver.h

@@ -48,9 +48,9 @@ struct class_entry {
   } methods;
 };
 
-struct hash_table_entry * class_resolver_load_from_buffers(const uint8_t * class_names[],
+struct hash_table_entry * class_resolver_load_from_buffers(const uint8_t ** class_names,
-                                                           const int class_names_length[],
+                                                           const int * class_names_length,
-                                                           uint8_t * buffers[],
+                                                           const uint8_t ** buffers,
                                                            int length,
                                                            int * hash_table_length);
 struct class_entry * class_resolver_lookup_class(int class_hash_table_length,

c/debug_class_file.c

@@ -1,5 +1,4 @@
 #include <stdint.h>
-#include <inttypes.h>
 
 #include "assert.h"
 #include "class_file.h"
@@ -51,7 +50,7 @@ void print_constant(struct constant * constant)
            *(float *)(&constant->_float.bytes));
     break;
   case CONSTANT_Long:
-    debugf("CONSTANT_Long bytes=%" PRId64 "\n",
+    debugf("CONSTANT_Long bytes=%l\n",
            constant->_long.bytes);
     break;
   case CONSTANT_Double:

c/frame.c

@@ -2,7 +2,6 @@
 
 #include "assert.h"
 #include "class_file.h"
-#include "memory.h"
 #include "debug_class_file.h"
 #include "bytes.h"
 #include "decode.h"
@@ -75,9 +74,17 @@ static int descriptor_nargs(struct constant * descriptor_constant, uint8_t * ret
       nargs += 1;
       while (descriptor_constant->utf8.bytes[i] != ';') i += 1;
       break;
-    default:
+    case 'B': [[fallthrough]];
+    case 'C': [[fallthrough]];
+    case 'F': [[fallthrough]];
+    case 'I': [[fallthrough]];
+    case 'S': [[fallthrough]];
+    case 'Z':
       nargs += 1;
       break;
+    default:
+      assert(false);
+      break;
     }
     i += 1;
   }
@@ -399,6 +406,7 @@ void vm_start(int class_hash_table_length,
                                                                  class_hash_table,
                                                                  main_class,
                                                                  main_class_length);
+
   assert(class_entry != nullptr);
 
   const char * method_name = "main";

c/main_dreamcast.c

@@ -0,0 +1,41 @@
+#include <stdint.h>
+
+#include "string.h"
+#include "class_resolver.h"
+#include "frame.h"
+#include "printf.h"
+
+#include "sh7091_scif.h"
+
+#include "p/Multiply.class.h"
+
+void main()
+{
+  scif_init(0);
+
+  const uint8_t * class_names[1];
+  int class_names_length[1];
+
+  class_names[0] = (const uint8_t *)"p/Multiply";
+  class_names_length[0] = string_length((const char *)class_names[0]);
+
+  const uint8_t * buffers[1];
+  buffers[0] = (const uint8_t *)&_binary_p_Multiply_class_start;
+
+  const uint8_t * main_class = class_names[0];
+  int main_class_length = class_names_length[0];
+
+  int length = (sizeof (class_names)) / (sizeof (class_names[0]));
+
+  int class_hash_table_length;
+  struct hash_table_entry * class_hash_table = class_resolver_load_from_buffers(class_names,
+                                                                                class_names_length,
+                                                                                buffers,
+                                                                                length,
+                                                                                &class_hash_table_length);
+
+  vm_start(class_hash_table_length,
+           class_hash_table,
+           main_class,
+           main_class_length);
+}

c/main_hosted.c

@@ -31,7 +31,7 @@ static struct hash_table_entry * load_from_filenames(const char * filenames[], i
 
   struct hash_table_entry * class_hash_table = class_resolver_load_from_buffers(class_names,
                                                                                 class_names_length,
-                                                                                buffers,
+                                                                                (const uint8_t **)buffers,
                                                                                 length,
                                                                                 hash_table_length);
 

c/sh7091_scif.cpp

@@ -3,6 +3,62 @@
 
 #include "sh7091_scif.h"
 
+void scif_init_wait()
+{
+  sh7091.TMU.TSTR &= (~tmu::tstr::str1::counter_start) & 0xff; // stop TCNT1
+  sh7091.TMU.TOCR = tmu::tocr::tcoe::tclk_is_external_clock_or_input_capture;
+  sh7091.TMU.TCR1 = tmu::tcr1::tpsc::p_phi_1024; // 1024 / 50MHz = 20.48 μs
+  sh7091.TMU.TCOR1 = 0xffff'ffff;
+  sh7091.TMU.TCNT1 = 0xffff'ffff;
+  sh7091.TMU.TSTR |= tmu::tstr::str1::counter_start;
+
+  uint32_t start = sh7091.TMU.TCNT1;
+  while ((start - sh7091.TMU.TCNT1) < 20);
+
+  sh7091.TMU.TSTR &= (~tmu::tstr::str1::counter_start) & 0xff; // stop TCNT1
+}
+
+void scif_init(int bit_rate)
+{
+  using namespace scif;
+
+  sh7091.SCIF.SCSCR2 = 0; // disable transmission / reception
+
+  sh7091.SCIF.SCSPTR2 = 0; // clear output data pins
+
+  sh7091.SCIF.SCFCR2 = scfcr2::tfrst::reset_operation_enabled
+                     | scfcr2::rfrst::reset_operation_enabled;
+
+  sh7091.SCIF.SCSMR2 = scsmr2::chr::_8_bit_data
+		     | scsmr2::pe::parity_disabled
+		     | scsmr2::stop::_1_stop_bit
+		     | scsmr2::cks::p_phi_clock;
+
+  sh7091.SCIF.SCBRR2 = bit_rate; // bps = 1562500 / (SCBRR2 + 1)
+
+  sh7091.SCIF.SCFSR2 = (~scfsr2::er::bit_mask)
+		     & (~scfsr2::tend::bit_mask)
+		     & (~scfsr2::tdfe::bit_mask)
+		     & (~scfsr2::brk::bit_mask)
+		     & (~scfsr2::rdf::bit_mask)
+		     & (~scfsr2::dr::bit_mask)
+		     & 0xffff;
+
+
+  // wait 1 bit interval
+  scif_init_wait();
+
+  sh7091.SCIF.SCFCR2 = scfcr2::rtrg::trigger_on_1_byte
+		     | scfcr2::ttrg::trigger_on_8_bytes
+		     //| scfcr2::mce::modem_signals_enabled
+		     ;
+
+  sh7091.SCIF.SCSCR2 = scscr2::te::transmission_enabled
+                     | scscr2::re::reception_enabled;
+
+  sh7091.SCIF.SCLSR2 = 0; // clear ORER
+}
+
 void scif_character(const char c)
 {
   using namespace scif;

c/sh7091_scif.h

@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+void scif_init_wait();
+void scif_init(int bit_rate);
 void scif_character(const char c);
 
 #ifdef __cplusplus

dreamcast

@@ -0,0 +1 @@
+../dreamcast

java.mk

@@ -0,0 +1,31 @@
+%.class: %.java
+	javac $<
+
+java/lang/%.class: java/lang/%.java
+	javac --source 8 --target 8 --boot-class-path . $<
+
+OBJ = \
+	c/decode.o \
+	c/class_file.o \
+	c/debug_class_file.o \
+	c/malloc.o \
+	c/execute.o \
+	c/memory_allocator.o \
+	c/class_resolver.o \
+	c/hash_table.o \
+	c/frame.o \
+	c/printf.o \
+	c/parse.o \
+	c/unparse.o
+
+MAIN_DREAMCAST_OBJ = \
+	c/sh7091_scif.o \
+	c/main_dreamcast.o
+
+MAIN_HOSTED_OBJ = \
+	c/file.o \
+	c/main_hosted.o
+
+PRINT_CLASS_OBJ = \
+	c/file.o \
+	c/print_class.o

p/Multiply.class.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint32_t _binary_p_Multiply_class_start __asm("_binary_p_Multiply_class_start");
+extern uint32_t _binary_p_Multiply_class_end __asm("_binary_p_Multiply_class_end");
+extern uint32_t _binary_p_Multiply_class_size __asm("_binary_p_Multiply_class_size");
+
+#ifdef __cplusplus
+}
+#endif

p/Multiply.java

@@ -0,0 +1,10 @@
+package p;
+
+class Multiply {
+    static int test(int a, int b) {
+        return a * b;
+    }
+    public static void main() {
+        test(6, 8);
+    }
+}