From bf69f336c3fb680e31a5bb43450739b0b06d95e1 Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Thu, 25 Mar 2021 22:37:33 +0200
Subject: makefile: make makefile recursive

---
 src/linker.ld | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/makefile  | 69 +++++++++++++++++++++++++++++++++++++++++++++--------------
 2 files changed, 114 insertions(+), 16 deletions(-)
 create mode 100644 src/linker.ld

(limited to 'src')

diff --git a/src/linker.ld b/src/linker.ld
new file mode 100644
index 0000000..8eba287
--- /dev/null
+++ b/src/linker.ld
@@ -0,0 +1,61 @@
+ENTRY(_start)
+OUTPUT_FORMAT(elf32-i386)
+
+VADDR_BASE = 0xc0000000;
+
+SECTIONS
+{
+    /*
+     * First put the multiboot header, as it is required to be put very early
+     * early in the image or the bootloader won't recognize the file format.
+     */
+    . = 0;
+    .multiboot : {
+        . = ALIGN(8);
+        begin_multiboot = .;
+        KEEP(*(.multiboot.header))
+        *(.multiboot.text)
+        *(.multiboot.pages))
+        end_multiboot = .;
+    }
+
+    /* Begin putting sections at 4 MiB */
+    . = VADDR_BASE;
+
+    .text ALIGN(4K) : AT(ADDR(.text) - VADDR_BASE + 4M) {
+        begin_text = .;
+        *(.text*)
+        end_text = .;
+    }
+ 
+    /* Read-only data. */
+    .rodata ALIGN(4K) : AT(ADDR(.rodata) - VADDR_BASE + 4M) {
+        begin_rodata = .;
+        *(.rodata*)
+        end_rodata = .;
+    }
+ 
+    /* Read-write data (initialized) */
+    .data ALIGN(4K) : AT(ADDR(.data) - VADDR_BASE + 4M) {
+        begin_data = .;
+        begin_constinit = .;
+        *(.constinit)
+        end_constinit = .;
+
+        begin_ctors = .;
+        KEEP(*(.init_array));   /* global constructors */
+        end_ctors = .;
+
+        *(.data)
+        end_data = .;
+    }
+ 
+    /* Read-write data (uninitialized) and stack */
+    .bss ALIGN(4K) : AT(ADDR(.bss) - VADDR_BASE + 4M) {
+        begin_bss = .;
+        *(.pages)
+        *(.bss*)
+        *(.stack)
+        end_bss = .;
+    }
+}
diff --git a/src/makefile b/src/makefile
index 6e8545d..96507ce 100644
--- a/src/makefile
+++ b/src/makefile
@@ -1,18 +1,21 @@
-AS_OBJ += src/boot.o \
-	  src/idt/stubs.o
-
-CXX_OBJ += src/kernel.o \
-	   src/kernel/dump_gdt.o src/kernel/dump_multiboot.o src/kernel/multiboot.o \
-	   src/cpu/cpu.o \
-	   src/gdt.o \
-	   src/gdt/segmentdescriptor.o \
-	   src/idt.o \
-	   src/idt/exception.o src/idt/interruptgate.o src/idt/interrupthandler.o \
-	   src/vmm.o \
-	   src/allocator.o \
-	   src/scheduler.o src/scheduler/task.o
-
-src/cpu/irq.h: $(OBJ_DIR)/src/idt/stubs.o
+AS_OBJ = boot.o idt/stubs.o
+AS_OBJ := $(addprefix $(OBJ_DIR)/, $(AS_OBJ))
+
+CXX_OBJ = kernel.o \
+	  kernel/dump_gdt.o kernel/dump_multiboot.o kernel/multiboot.o \
+	  cpu/cpu.o \
+	  gdt.o \
+	  gdt/segmentdescriptor.o \
+	  idt.o \
+	  idt/exception.o idt/interruptgate.o idt/interrupthandler.o \
+	  vmm.o \
+	  allocator.o \
+	  scheduler.o scheduler/task.o
+CXX_OBJ := $(addprefix $(OBJ_DIR)/, $(CXX_OBJ))
+CXX_DEP = $(CXX_OBJ:%.o=%.d)
+CXX_JSON = $(CXX_OBJ:.o=.json)
+
+cpu/irq.h: $(OBJ_DIR)/idt/stubs.o
 	@echo "  GEN  $@"
 	@echo '#pragma once' > $@
 	@echo 'extern "C" {' >> $@
@@ -20,4 +23,38 @@ src/cpu/irq.h: $(OBJ_DIR)/src/idt/stubs.o
 	@for x in $^; do $(NM) $$x -g | $(SED) -nr 's/[0-9a-f]{8} T (.+)/void \1();/p'; done >> $@
 	@echo '}' >> $@
 
-autogen := $(autogen) src/cpu/irq.h
+autogen := $(autogen) cpu/irq.h
+
+.PHONY: all test clean
+all: $(OBJ_DIR)/kernel.a
+test: $(TEST_CXX_OBJ)
+
+$(AS_OBJ): $(OBJ_DIR)/%.o: %.S
+	@mkdir -p $(@D)
+	@echo "  AS   $<"
+	@$(AS) -target $(TARGET) $(AS_FLAGS) $(CXX_INCLUDE) -c $^ -o $@
+
+-include $(CXX_DEP)
+$(CXX_OBJ) : $(OBJ_DIR)/%.o : %.cc
+	@mkdir -p $(@D)
+	@echo "  CXX  $<"
+	@$(CXX) -target $(TARGET) $(CXX_FLAGS) $(CXX_INCLUDE) -MMD -MJ$(subst .o,.json,$@) -c $< -o $@
+
+$(OBJ_DIR)/glitch.elf: $(autogen) $(AS_OBJ) $(CXX_OBJ) linker.ld
+	@echo "  LD   $@"
+	@$(LD) $(LD_FLAGS) -o $@ $(AS_OBJ) $(CXX_OBJ) -lk -ld
+
+# constexpr tests
+-include $(TEST_CXX_DEP)
+$(TEST_CXX_OBJ): $(OBJ_DIR)/%.o : %.cc
+	@mkdir -p $(@D)
+	@echo "  TEST $<"
+	@$(TEST_CXX) -target $(TARGET) $(TEST_CXX_FLAGS) $(CXX_INCLUDE) -MMD -c $< -o $@
+
+compile_commands.json: $(CXX_JSON)
+	@echo [ > $@
+	@cat $(CXX_JSON) >> $@
+	@echo ] >> $@
+
+clean:
+	@rm -f $(AS_OBJ) $(CXX_OBJ) $(CXX_TEST_OBJ) $(OBJ_DIR)/glitch.elf
-- 
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