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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
//! Copyright (c) 2025 Freya Murphy <freya@freyacat.org>
const std = @import("std");
const builtin = @import("builtin");
const c_flags = &[_][]const u8{
// lang
"-std=c11",
// warnings
"-Wall",
"-Wextra",
"-pedantic",
// flags
"-fno-pie",
"-fno-stack-protector",
"-fno-omit-frame-pointer",
"-ffreestanding",
"-fno-builtin",
// symbols
"-ggdb",
};
const kernel_src = &[_][]const u8{
"kernel/entry.S", // must be first
"kernel/main.c", // main function
"kernel/cpu/cpu.c",
"kernel/cpu/fpu.c",
"kernel/cpu/idt.c",
"kernel/cpu/idt.S",
"kernel/cpu/pic.c",
"kernel/drivers/acpi.c",
"kernel/drivers/clock.c",
"kernel/drivers/drivers.c",
"kernel/drivers/pci.c",
"kernel/drivers/tty.c",
"kernel/drivers/uart.c",
"kernel/fs/fs.c",
"kernel/lib/atox.c",
"kernel/lib/bound.c",
"kernel/lib/btoa.c",
"kernel/lib/ctoi.c",
"kernel/lib/isdigit.c",
"kernel/lib/isspace.c",
"kernel/lib/itoc.c",
"kernel/lib/kalloc.c",
"kernel/lib/kprintf.c",
"kernel/lib/memcmp.c",
"kernel/lib/memcpy.c",
"kernel/lib/memcpyv.c",
"kernel/lib/memmove.c",
"kernel/lib/memmovev.c",
"kernel/lib/memset.c",
"kernel/lib/memsetv.c",
"kernel/lib/panic.c",
"kernel/lib/stpcpy.c",
"kernel/lib/stpncpy.c",
"kernel/lib/strcat.c",
"kernel/lib/strcpy.c",
"kernel/lib/strlen.c",
"kernel/lib/strncmp.c",
"kernel/lib/strncpy.c",
"kernel/lib/strtoux.c",
"kernel/lib/strtox.c",
"kernel/lib/uxtoa.c",
"kernel/lib/xtoa.c",
"kernel/mboot/mboot.c",
"kernel/mboot/mmap.c",
"kernel/mboot/rsdp.c",
"kernel/memory/memory.c",
"kernel/memory/paging.c",
"kernel/memory/physalloc.c",
"kernel/memory/virtalloc.c",
};
const Prog = struct {
name: []const u8,
source: []const []const u8,
};
const AddSourcesOpts = struct { exe: *std.Build.Step.Compile, sources: []const []const []const u8, c_flags: []const []const u8 };
fn add_sources(b: *std.Build, opts: AddSourcesOpts) void {
// add asm and c source files
for (opts.sources) |source| {
for (source) |file| {
if (std.mem.endsWith(u8, file, ".c")) {
// c file
opts.exe.addCSourceFile(.{ .file = b.path(file), .flags = opts.c_flags });
} else {
// assembly file
opts.exe.addAssemblyFile(b.path(file));
}
}
}
}
const BuildKernBinaryOpts = struct {
name: []const u8,
target: std.Build.ResolvedTarget,
optimize: std.builtin.OptimizeMode,
sources: []const []const []const u8,
linker: ?[]const u8 = null,
entry: []const u8 = "_start",
strip: bool = false,
include: ?[]const u8 = null,
};
fn build_kern_binary(b: *std.Build, opts: BuildKernBinaryOpts) void {
// create compile step
const exe = b.addExecutable(.{
.name = opts.name,
.target = opts.target,
.optimize = opts.optimize,
.strip = opts.strip,
});
// add include path
if (opts.include != null) {
exe.addIncludePath(b.path(opts.include.?));
}
// set entry
exe.entry = .{ .symbol_name = opts.entry };
// add asm and c source files
add_sources(b, .{
.exe = exe,
.sources = opts.sources,
.c_flags = c_flags,
});
if (opts.linker != null) {
exe.setLinkerScript(b.path(opts.linker.?));
}
const step = b.addInstallArtifact(exe, .{ .dest_dir = .{
.override = .{ .custom = "../bin" },
} });
b.getInstallStep().dependOn(&step.step);
}
const BuildNativeBinaryOpts = struct {
name: []const u8,
optimize: std.builtin.OptimizeMode,
sources: []const []const []const u8,
};
fn build_native_binary(b: *std.Build, opts: BuildNativeBinaryOpts) void {
// create compile step
const exe = b.addExecutable(.{
.name = opts.name,
.target = b.graph.host,
.optimize = opts.optimize,
.strip = true,
});
// include libc
exe.linkLibC();
// add asm and c source files
add_sources(b, .{
.exe = exe,
.sources = opts.sources,
.c_flags = &.{},
});
const step = b.addInstallArtifact(exe, .{ .dest_dir = .{
.override = .{ .custom = "../bin" },
} });
b.getInstallStep().dependOn(&step.step);
}
pub fn build(b: *std.Build) !void {
// context
const target64 = std.Build.resolveTargetQuery(b, .{
.cpu_arch = std.Target.Cpu.Arch.x86_64,
.os_tag = std.Target.Os.Tag.freestanding,
.abi = std.Target.Abi.gnu,
.ofmt = std.Target.ObjectFormat.elf,
});
const optimize = std.builtin.OptimizeMode.ReleaseFast;
// kernel
build_kern_binary(b, .{
.name = "kernel",
.target = target64,
.optimize = optimize,
.sources = &.{
kernel_src,
},
.linker = "config/kernel.ld",
.include = "kernel/include",
});
}
|
