blob: 3fc72b191455d58bc4c5bb3a94fc735b2d17fe5a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2026 Richard Qin
#
# LumeOS Kernel Makefile (Non-Recursive)
#
# Usage:
# make - Build kernel ELF
# make run - Run in QEMU
# make debug - Run in QEMU with GDB server
# make clean - Clean build artifacts
# make fmt - Format all source files
# make disasm - Generate disassembly listing
#
# Reference: docs/specs/00_conventions.md §7
# ============================================================
# Toolchain Detection
# ============================================================
ifndef TOOLCHAIN_PREFIX
TOOLCHAIN_PREFIX := $(shell \
if command -v riscv64-linux-gnu-gcc >/dev/null 2>&1; then \
echo riscv64-linux-gnu-; \
elif command -v riscv64-unknown-linux-gnu-gcc >/dev/null 2>&1; then \
echo riscv64-unknown-linux-gnu-; \
elif command -v riscv64-unknown-elf-gcc >/dev/null 2>&1; then \
echo riscv64-unknown-elf-; \
else \
echo riscv64-linux-gnu-; \
fi)
endif
CC := $(TOOLCHAIN_PREFIX)gcc
CXX := $(TOOLCHAIN_PREFIX)g++
LD := $(TOOLCHAIN_PREFIX)ld
OBJCOPY := $(TOOLCHAIN_PREFIX)objcopy
OBJDUMP := $(TOOLCHAIN_PREFIX)objdump
# ============================================================
# Build Configuration
# ============================================================
ARCH := riscv
BUILD := build
TARGET := $(BUILD)/kernel.elf
IMAGE := $(BUILD)/kernel.bin
LINKER_SCRIPT := linker.ld
# Common flags (base, before module includes)
WARNINGS := -Wall -Wextra -Wno-unused-parameter
INCLUDES := -Iinclude
# ============================================================
# Source Collection (Non-Recursive Module Fragments)
# Module .mk files may append to SRCS_CC, SRCS_S, INCLUDES
# ============================================================
SRCS_CC :=
SRCS_S :=
include arch/$(ARCH)/module.mk
include kernel/module.mk
# include mm/module.mk # Phase 1
# include fs/module.mk # Phase 3
# include drivers/module.mk # As needed
include lib/module.mk
# Compiler flags (defined AFTER includes so INCLUDES is complete)
CFLAGS := $(WARNINGS) -O2 -g \
-ffreestanding -nostdlib \
-mcmodel=medany \
-MMD -MP \
$(INCLUDES)
CXXFLAGS := $(CFLAGS) \
-std=c++17 \
-fno-exceptions -fno-rtti -fno-use-cxa-atexit \
-fno-threadsafe-statics
ASFLAGS := $(CFLAGS)
LDFLAGS := -nostdlib -static
# ============================================================
# Object File Computation
# ============================================================
OBJS := $(patsubst %.cc,$(BUILD)/%.o,$(SRCS_CC)) \
$(patsubst %.S,$(BUILD)/%.o,$(SRCS_S))
DEPS := $(OBJS:.o=.d)
# ============================================================
# Build Rules
# ============================================================
.PHONY: all clean run debug fmt disasm
all: $(IMAGE)
# Link kernel ELF
$(TARGET): $(OBJS) $(LINKER_SCRIPT)
@echo " LD $@"
@mkdir -p $(dir $@)
@$(LD) $(LDFLAGS) -T $(LINKER_SCRIPT) -o $@ $(OBJS)
@$(TOOLCHAIN_PREFIX)size $@
# Generate flat binary for QEMU loading
$(IMAGE): $(TARGET)
@echo " OBJCOPY $@"
@$(OBJCOPY) -O binary $< $@
# Compile C++ sources
$(BUILD)/%.o: %.cc
@echo " CXX $<"
@mkdir -p $(dir $@)
@$(CXX) $(CXXFLAGS) -c $< -o $@
# Assemble RISC-V assembly
$(BUILD)/%.o: %.S
@echo " AS $<"
@mkdir -p $(dir $@)
@$(CC) $(ASFLAGS) -c $< -o $@
# Auto-dependency tracking
-include $(DEPS)
# ============================================================
# Run & Debug
# ============================================================
QEMU := qemu-system-riscv64
QEMU_MACHINE := -machine virt -m 128M -nographic
QEMU_BIOS := -bios default
run: $(IMAGE)
@echo " QEMU Running..."
$(QEMU) $(QEMU_MACHINE) $(QEMU_BIOS) -kernel $(IMAGE)
debug: $(IMAGE)
@echo " QEMU Waiting for GDB on :1234..."
$(QEMU) $(QEMU_MACHINE) $(QEMU_BIOS) -kernel $(IMAGE) -s -S
# ============================================================
# Utilities
# ============================================================
clean:
rm -rf $(BUILD)
disasm: $(TARGET)
@echo " OBJDUMP $<"
@$(OBJDUMP) -d -S $(TARGET) > $(TARGET).asm
@echo " Written to $(TARGET).asm"
fmt:
@echo " FMT Formatting source files..."
@find . -name '*.cc' -o -name '*.h' | xargs clang-format -i 2>/dev/null || true
# Print build info (for debugging Makefile issues)
info:
@echo "TOOLCHAIN_PREFIX = $(TOOLCHAIN_PREFIX)"
@echo "SRCS_CC = $(SRCS_CC)"
@echo "SRCS_S = $(SRCS_S)"
@echo "OBJS = $(OBJS)"
|
