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realchonkrealchonk
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‎.gitignore

+2
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**/test/
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**/tools/

‎Makefile

+79
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ARCH=i386
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ARCHDIR=arch/$(ARCH)
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CC=i686-elf-gcc
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CPP=i686-elf-g++
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LD=i686-elf-ld -O3
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AS=nasm
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INCLUDES=-Iinclude -Iinclude/libc
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CFLSHARED=-ffreestanding -Wall -Wextra -fstack-protector -fno-builtin -fno-leading-underscore -mfpmath=387
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CFLAGS=-std=gnu11 $(CFLSHARED) $(INCLUDES)
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CPPFLAGS=-std=gnu++11 -fno-exceptions -fno-rtti -fno-use-cxa-atexit $(CFLSHARED) $(INCLUDES)
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LDFLAGS=-melf_i386 -nostdlib -L.
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ASFLAGS=-felf32
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CRT_BEGIN=$(shell $(CC) $(CFLAGS) -print-file-name=crtbegin.o)
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CRT_END=$(shell $(CC) $(CFLAGS) -print-file-name=crtend.o)
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objects_arch_c =$(patsubst $(ARCHDIR)/%.c,$(ARCHDIR)/%.o,$(wildcard $(ARCHDIR)/*.c))
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objects_arch_cpp=$(patsubst $(ARCHDIR)/%.cpp,$(ARCHDIR)/%.o,$(wildcard $(ARCHDIR)/*.cpp))
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objects_arch_asm=$(patsubst $(ARCHDIR)/%.asm,$(ARCHDIR)/%.o,$(wildcard $(ARCHDIR)/*.asm))
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objects_arch=$(objects_arch_c) $(objects_arch_cpp) $(objects_arch_asm)
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objects_kernel_c =$(patsubst kernel/%.c,kernel/%.o,$(wildcard kernel/*.c))
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objects_kernel_cpp=$(patsubst kernel/%.cpp,kernel/%.o,$(wildcard kernel/*.cpp))
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objects_kernel=$(objects_kernel_c) $(objects_kernel_cpp)
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objects_lib_c =$(patsubst lib/%.c,lib/%.o,$(wildcard lib/*.c))
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objects_lib_cpp=$(patsubst lib/%.cpp,lib/%.o,$(wildcard lib/*.cpp))
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objects_lib=$(objects_lib_c) $(objects_lib_cpp)
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objects=crti.o $(objects_arch) $(objects_kernel) $(objects_lib) crtn.o
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kernel.bin: $(objects)
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$(LD) -Tlinker.ld -o $@ $(LDFLAGS) $(CRT_BEGIN) $(objects) $(CRT_END) -lgcc
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%.o: %.asm
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nasm -felf32 -o $@ $<
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$(ARCHDIR)/%.o: $(ARCHDIR)/%.c
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$(CC) -c -o $@ $< $(CFLAGS)
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$(ARCHDIR)/%.o: $(ARCHDIR)/%.cpp
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$(CPP) -c -o $@ $< $(CPPFLAGS)
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$(ARCHDIR)/%.o: $(ARCHDIR)/%.asm
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$(AS) -o $@ $< $(ASFLAGS)
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kernel/%.o: kernel/%.c
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$(CC) -c -o $@ $< $(CFLAGS)
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kernel/%.o: kernel/%.cpp
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$(CPP) -c -o $@ $< $(CPPFLAGS)
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lib/%.o: lib/%.c
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$(CC) -c -o $@ $< $(CFLAGS)
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lib/%.o: lib/%.cpp
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$(CPP) -c -o $@ $< $(CPPFLAGS)
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clean:
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rm -rf $(objects) iso/
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run: kernel.bin
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qemu-system-i386 -kernel kernel.bin -m 64M # -no-reboot-d int,cpu_reset
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runvbox: benos.iso
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virtualbox --startvm BenOS
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benos.iso: kernel.bin grub.cfg
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mkdir -p iso/boot/grub
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cp kernel.bin iso/boot/kernel.bin
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cp grub.cfg iso/boot/grub/grub.cfg
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grub-mkrescue -o $@ iso/
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install: kernel.bin
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sudo cp $< /boot/benos.bin
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device ?= "100101"
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burn: benos.iso
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if [ "$(device)" = "100101" ]; then echo device is empty; exit 1; fi
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sudo dd bs=4M if=$< of=$(device) conv=fdatasync
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.PHONY: clean run runvbox install burn

‎arch/i386/cmath.asm

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section .text
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global sqrt:function (sqrt.end - sqrt)
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global sqrtf:function (sqrtf.end - sqrtf)
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global sin:function (sin.end - sin)
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global sinf:function (sinf.end - sinf)
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global cos:function (cos.end - cos)
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global cosf:function (cosf.end - cosf)
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global fabs:function (fabs.end - fabs)
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global fabsf:function (fabsf.end - fabsf)
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global tan:function (tan.end - tan)
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global tanf:function (tanf.end - tanf)
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global rad2deg:function (rad2deg.end - rad2deg)
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global deg2rad:function (deg2rad.end - deg2rad)
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global round:function (round.end - round)
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global roundf:function (roundf.end - roundf)
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global fmin:function (fmin.end - fmin)
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global fminf:function (fminf.end - fminf)
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global fmax:function (fmax.end - fmax)
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global fmaxf:function (fmaxf.end - fmaxf)
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; +4 x
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sqrt:
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fld qword [esp + 4]
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fsqrt
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ret
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.end:
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; +4 x
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sqrtf:
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fld dword [esp + 4]
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fsqrt
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ret
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.end:
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; +4 x
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sin:
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fld qword [esp + 4]
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fsin
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ret
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.end:
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; +4 x
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sinf:
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fld dword [esp + 4]
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fsin
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ret
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.end:
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; +4 x
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cos:
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fld qword [esp + 4]
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fcos
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ret
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.end:
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; +4 x
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cosf:
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fld dword [esp + 4]
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fcos
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ret
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.end:
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fabs:
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fld qword [esp + 4]
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fabs
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ret
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.end:
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fabsf:
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fld dword [esp + 4]
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fabs
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ret
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.end:
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; +4 x
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tan:
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fld qword [esp + 4]
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fcos
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fld qword [esp + 4]
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fsin
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fdiv st0, st1
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ret
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.end:
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tanf:
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fld dword [esp + 4]
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fsincos
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fdiv
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ret
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.end:
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_180_pi: dd 57.2958
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; +4 x
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rad2deg:
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fld qword [esp + 4]
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fmul dword [_180_pi]
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ret
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.end:
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pi_180: dd 0.0174533
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; +4 x
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deg2rad:
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fld qword [esp + 4]
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fmul dword [pi_180]
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ret
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.end:
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; +8 x
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round:
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push ebp
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mov ebp, esp
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sub esp, byte 8
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fld qword [ebp + 8]
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fistp qword [esp]
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fild qword [esp]
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add esp, byte 8
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pop ebp
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ret
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.end:
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; +8 x
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roundf:
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push ebp
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mov ebp, esp
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sub esp, byte 4
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fld dword [ebp + 8]
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fistp dword [esp]
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fild dword [esp]
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add esp, byte 4
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pop ebp
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ret
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.end:
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; + 4 a
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; +12 b
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fmin:
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; y = a < b ? a : b;
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fld qword [esp + 4]
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fld qword [esp + 12]
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fcompp
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jl .l1
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fld qword [esp + 12]
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ret
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.l1:
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fld qword [esp + 4]
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ret
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.end:
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; +4 a
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; +8 b
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fminf:
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fld dword [esp + 4]
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fld dword [esp + 8]
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fcompp
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jl .l1
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fld dword [esp + 8]
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ret
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.l1:
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fld dword [esp + 4]
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ret
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.end:
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; + 4 a
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; +12 b
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fmax:
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fld qword [esp + 4]
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fld qword [esp + 8]
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fcompp
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jg .l1
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fld qword [esp + 8]
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ret
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.l1:
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fld qword [esp + 4]
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ret
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.end:
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; +4 a
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; +8 b
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fmaxf:
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fld dword [esp + 4]
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fld dword [esp + 8]
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fcompp
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jg .l1
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fld dword [esp + 8]
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ret
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.l1:
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fld dword [esp + 4]
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ret
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.end:

‎arch/i386/cstdlib.asm

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global rand:function (rand.end - rand)
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global srand:function (srand.end - srand)
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global div:function (div.end - div)
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global ldiv:function (div.end - div)
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global lldiv:function (lldiv.end - lldiv)
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rand_seed: dd 1
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rand:
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push edx
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; next = next * 1103515245 + 12345
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mov eax, 1103515245
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mul dword [rand_seed]
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add eax, 12345
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mov dword [rand_seed], eax
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shr eax, byte 16
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mov ecx, 32768
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xor edx, edx
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div ecx
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mov eax, edx
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pop edx
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ret
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.end:
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; +4 seed
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srand:
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mov eax, dword [esp + 4]
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mov dword [rand_seed], eax
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ret
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.end:
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; +16 denom
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; +12 number
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; + 8 return value ptr
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ldiv:
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div:
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push ebp
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mov ebp, esp
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mov ecx, dword [ebp + 8]
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xor edx, edx
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mov eax, dword [ebp + 12]
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div dword [ebp + 16]
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mov dword [ecx], eax
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mov dword [ecx + 4], edx
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pop ebp
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ret 4
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.end:
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; +20 denom
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; +12 number
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; + 8 return value ptr
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unsupported: db "lldiv() is unsupported!", 10, 0
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extern printk
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lldiv:
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push ebp
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mov ebp, esp
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push unsupported
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call printk
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add esp, byte 4
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pop ebp
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ret
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.end:
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