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-rw-r--r--.gitignore8
-rw-r--r--.gitmodules3
-rw-r--r--Makefile66
-rw-r--r--compile_flags.txt3
-rw-r--r--initrd/Makefile15
-rwxr-xr-xinitrd/archive/initbin0 -> 4352 bytes
-rw-r--r--initrd/programs/init/Makefile8
-rw-r--r--initrd/programs/init/main.c9
m---------kernel0
-rw-r--r--lib/crt/Makefile8
-rw-r--r--lib/crt/x86_64/crt0.s22
-rw-r--r--lib/crt/x86_64/crti.s11
-rw-r--r--lib/crt/x86_64/crtn.s7
-rw-r--r--lib/jlibc/Makefile12
-rw-r--r--lib/jlibc/stdlib/exit.c5
-rw-r--r--limine.mk9
-rw-r--r--scripts/binutils-2.41.diff78
-rw-r--r--scripts/buildtools.mk63
-rw-r--r--scripts/gcc-13.2.0.diff78
-rw-r--r--shell.nix29
-rw-r--r--sysroot/boot/initrd.tarbin0 -> 10240 bytes
-rw-r--r--sysroot/boot/limine.cfg13
-rw-r--r--sysroot/usr/include/errno.h0
-rw-r--r--sysroot/usr/include/stdint.h319
-rw-r--r--sysroot/usr/include/stdio.h26
-rw-r--r--sysroot/usr/include/stdlib.h17
-rw-r--r--sysroot/usr/include/string.h11
-rw-r--r--sysroot/usr/include/sys/types.h6
-rw-r--r--sysroot/usr/include/time.h4
-rw-r--r--sysroot/usr/include/unistd.h11
30 files changed, 841 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..461a13b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+*.a
+*.o
+*.elf
+*.hdd
+.ccls*
+tools
+ovmf*
+limine
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a550a15
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "kernel"]
+ path = kernel
+ url = ssh://git@git.jonsantmyer.com:49/home/git/jove-kernel
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a342acc
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,66 @@
+TOOLSDIR := $(PWD)/tools
+KERNELDIR := $(PWD)/kernel
+SYSROOTDIR := $(PWD)/sysroot
+INITRDDIR := $(PWD)/initrd
+LIBDIR := $(PWD)/lib
+
+include kernel/config.mk
+
+CC = $(TOOLSDIR)/bin/$(TARGET_TRIPLET)-gcc
+LD = $(TOOLSDIR)/bin/$(TARGET_TRIPLET)-ld
+AS = $(TOOLSDIR)/bin/$(TARGET_TRIPLET)-as
+
+KERNEL_BIN := $(KERNELDIR)/jove.elf
+LIBC := $(SYSROOTDIR)/lib/libc.a
+
+INITRD_TAR := $(SYSROOTDIR)/boot/initrd.tar
+
+TEST_HDD := $(PWD)/test.hdd
+TEST_HDD_SIZEM = 64
+TEST_HDD_DIR := $(PWD)/test_hdd
+
+all: $(KERNEL_BIN)
+
+.PHONY: clean
+clean:
+ $(MAKE) -C $(KERNELDIR) clean
+
+.PHONY: $(KERNEL_BIN)
+$(KERNEL_BIN):
+ $(MAKE) -C $(KERNELDIR) CC=$(CC) LD=$(LD) AS=$(AS)
+
+.PHONY: test
+.ONESHELL:
+test: $(TEST_HDD) $(KERNEL_BIN)
+ sudo rm -rf $(TEST_HDD_DIR)
+ mkdir -p $(TEST_HDD_DIR)
+ export LOOPBACK_DEV=$(shell sudo losetup -Pf --show $(TEST_HDD))
+ sudo partprobe $$LOOPBACK_DEV
+ sudo mkfs.fat -F 32 "$$LOOPBACK_DEV"p1
+ sudo mount "$$LOOPBACK_DEV"p1 $(TEST_HDD_DIR)
+ sudo cp -r $(SYSROOTDIR)/* $(TEST_HDD_DIR)
+ sudo cp $(KERNEL_BIN) $(TEST_HDD_DIR)/boot
+ sudo cp limine/limine.exe $(TEST_HDD_DIR)/boot
+ sudo mkdir -p $(TEST_HDD_DIR)/EFI/BOOT
+ sudo cp limine/BOOTX64.EFI $(TEST_HDD_DIR)/EFI/BOOT
+ sync
+ sudo umount $(TEST_HDD_DIR)
+ sudo losetup -d $$LOOPBACK_DEV
+ sudo rm -rf $(TEST_HDD_DIR)
+ qemu-system-x86_64 -m 512M -M q35 -bios ovmf-x64/OVMF.fd -net none -smp 4 -hda test.hdd -serial stdio -no-shutdown -no-reboot -s
+
+.PHONY: $(TEST_HDD)
+$(TEST_HDD): $(INITRD_TAR)
+ rm -f $(TEST_HDD)
+ dd if=/dev/zero bs=1M count=0 seek=$(TEST_HDD_SIZEM) of=$(TEST_HDD)
+ parted -s $(TEST_HDD) mklabel gpt
+ parted -s $(TEST_HDD) mkpart primary 2048s 100%
+
+.PHONY: $(INITRD_TAR)
+$(INITRD_TAR): $(LIBC)
+ $(MAKE) -C $(INITRDDIR) OUT=$(INITRD_TAR) ABIDIR=$(KERNELDIR)/abi LIBDIR=$(LIBDIR)
+
+.PHONY: $(LIBC)
+$(LIBC):
+ $(MAKE) -C $(LIBDIR)/crt LIBDIR=$(SYSROOTDIR)/lib TARGET_MACHINE=$(TARGET_MACHINE)
+ $(MAKE) -C $(LIBDIR)/jlibc OUT=$@
diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..5e3aaad
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,3 @@
+-Ikernel/abi
+-ffreestanding
+-nostdlib
diff --git a/initrd/Makefile b/initrd/Makefile
new file mode 100644
index 0000000..66f3753
--- /dev/null
+++ b/initrd/Makefile
@@ -0,0 +1,15 @@
+ARCHIVEDIR := archive
+PROGRAMSDIR := programs
+FILESDIR := files
+
+PROGRAMDIRS := $(wildcard $(PROGRAMSDIR)/*)
+PROGRAMBINS := $(patsubst $(PROGRAMSDIR)/%,$(ARCHIVEDIR)/%,$(PROGRAMDIRS))
+
+OUT = initrd.tar
+
+all: ${PROGRAMBINS}
+ tar -cf $(OUT) -C $(ARCHIVEDIR) .
+
+.PHONY: $(ARCHIVEDIR)/%
+$(ARCHIVEDIR)/% : $(PROGRAMSDIR)/%
+ $(MAKE) -C $< OUT=../../$@ ABIDIR=$(ABIDIR)
diff --git a/initrd/archive/init b/initrd/archive/init
new file mode 100755
index 0000000..44e70d6
--- /dev/null
+++ b/initrd/archive/init
Binary files differ
diff --git a/initrd/programs/init/Makefile b/initrd/programs/init/Makefile
new file mode 100644
index 0000000..3a283de
--- /dev/null
+++ b/initrd/programs/init/Makefile
@@ -0,0 +1,8 @@
+CFILES := $(wildcard *.c)
+OFILES := $(patsubst %.c,%.o,$(CFILES))
+
+all: ${OFILES}
+ $(CC) $< -o $(OUT) -lc
+
+%.o : %.c
+ $(CC) -I$(ABIDIR) -g $(CFLAGS) -c $< -o $@
diff --git a/initrd/programs/init/main.c b/initrd/programs/init/main.c
new file mode 100644
index 0000000..870ad28
--- /dev/null
+++ b/initrd/programs/init/main.c
@@ -0,0 +1,9 @@
+#include "syscall.h"
+
+int
+main(int argc, char *argv[])
+{
+ _syscall_log("Hello, Userland!\n");
+ for(;;);
+ return 0;
+}
diff --git a/kernel b/kernel
new file mode 160000
+Subproject d1ff7bcc91886626dc9060ec5fb67ee102ab7c1
diff --git a/lib/crt/Makefile b/lib/crt/Makefile
new file mode 100644
index 0000000..8b809fa
--- /dev/null
+++ b/lib/crt/Makefile
@@ -0,0 +1,8 @@
+SFILES := $(wildcard $(TARGET_MACHINE)/*.s)
+OFILES := $(patsubst %.s,%.o,$(SFILES))
+
+all: ${OFILES}
+ cp ${OFILES} $(LIBDIR)/
+
+%.o:%.s
+ $(AS) $< -o $@
diff --git a/lib/crt/x86_64/crt0.s b/lib/crt/x86_64/crt0.s
new file mode 100644
index 0000000..c5a0ba9
--- /dev/null
+++ b/lib/crt/x86_64/crt0.s
@@ -0,0 +1,22 @@
+.section .text
+.global _start
+_start:
+ #Setup start of stack frame
+ xorq %rbp, %rbp
+ pushq %rbp
+ pushq %rbp
+ movq %rsp, %rbp
+
+ #Save arguments passed to main
+ pushq %rdi
+ pushq %rsi
+
+ #Setup libc and call global constructors
+
+ #Call main
+ call main
+
+ #Exit
+ movq %rax, %rdi
+ call exit
+.size _start, . - _start
diff --git a/lib/crt/x86_64/crti.s b/lib/crt/x86_64/crti.s
new file mode 100644
index 0000000..0f06273
--- /dev/null
+++ b/lib/crt/x86_64/crti.s
@@ -0,0 +1,11 @@
+.section .init
+.global _init
+_init:
+ pushq %rbp
+ movq %rsp, %rbp
+
+.section .fini
+.global _fini
+_fini:
+ pushq %rbp
+ movq %rsp, %rbp
diff --git a/lib/crt/x86_64/crtn.s b/lib/crt/x86_64/crtn.s
new file mode 100644
index 0000000..9e31c23
--- /dev/null
+++ b/lib/crt/x86_64/crtn.s
@@ -0,0 +1,7 @@
+.section .init
+ popq %rbp
+ ret
+
+.section .fini
+ popq %rbp
+ ret
diff --git a/lib/jlibc/Makefile b/lib/jlibc/Makefile
new file mode 100644
index 0000000..65e645c
--- /dev/null
+++ b/lib/jlibc/Makefile
@@ -0,0 +1,12 @@
+CFILES := $(wildcard *.c)
+CFILES += $(wildcard */*.c)
+
+OFILES := $(patsubst %.c,%.o,$(CFILES))
+
+all: $(OUT)
+
+$(OUT): ${OFILES}
+ ar rcs $@ ${OFILES}
+
+%.o:%.c
+ $(CC) $(CFLAGS) -c $< -o $@
diff --git a/lib/jlibc/stdlib/exit.c b/lib/jlibc/stdlib/exit.c
new file mode 100644
index 0000000..225f74e
--- /dev/null
+++ b/lib/jlibc/stdlib/exit.c
@@ -0,0 +1,5 @@
+__attribute__((noreturn))
+void exit(int status)
+{
+
+}
diff --git a/limine.mk b/limine.mk
new file mode 100644
index 0000000..796c8bd
--- /dev/null
+++ b/limine.mk
@@ -0,0 +1,9 @@
+LIMINE_VERSION := 6.x
+LIMINE_GIT := https://github.com/limine-bootloader/limine.git
+LIMINE_DIR := $(PWD)/limine
+
+all: $(LIMINE_DIR)
+
+$(LIMINE_DIR):
+ git clone $(LIMINE_GIT) --branch=v$(LIMINE_VERSION)-branch-binary --depth=1
+
diff --git a/scripts/binutils-2.41.diff b/scripts/binutils-2.41.diff
new file mode 100644
index 0000000..363e9ca
--- /dev/null
+++ b/scripts/binutils-2.41.diff
@@ -0,0 +1,78 @@
+diff -rNau binutils-2.41/bfd/config.bfd binutils-2.41-patched/bfd/config.bfd
+--- binutils-2.41/bfd/config.bfd 2023-07-02 19:00:00.000000000 -0400
++++ binutils-2.41-patched/bfd/config.bfd 2024-03-10 23:19:47.522036207 -0400
+@@ -714,6 +714,13 @@
+ targ_selvecs="i386_elf32_vec iamcu_elf32_vec x86_64_elf32_vec i386_pei_vec x86_64_pe_vec x86_64_pei_vec"
+ want64=true
+ ;;
++#ifdef BFD64
++ x86_64-*-jove*)
++ targ_defvec=x86_64_elf64_vec
++ targ_selvecs=i386_elf32_vec
++ want64=true
++ ;;
++#endif
+ x86_64-*-mingw* | x86_64-*-pe | x86_64-*-pep | x86_64-*-cygwin)
+ targ_defvec=x86_64_pe_vec
+ targ_selvecs="x86_64_pe_vec x86_64_pei_vec x86_64_pe_big_vec x86_64_elf64_vec i386_pe_vec i386_pei_vec i386_elf32_vec iamcu_elf32_vec pdb_vec"
+diff -rNau binutils-2.41/config.sub binutils-2.41-patched/config.sub
+--- binutils-2.41/config.sub 2023-07-02 19:00:00.000000000 -0400
++++ binutils-2.41-patched/config.sub 2024-03-10 23:33:30.546506756 -0400
+@@ -1758,7 +1758,7 @@
+ | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+ | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+ | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
+- | fiwix* | mlibc* )
++ | fiwix* | mlibc* | jove* )
+ ;;
+ # This one is extra strict with allowed versions
+ sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
+diff -rNau binutils-2.41/gas/configure.tgt binutils-2.41-patched/gas/configure.tgt
+--- binutils-2.41/gas/configure.tgt 2023-07-02 19:00:00.000000000 -0400
++++ binutils-2.41-patched/gas/configure.tgt 2024-03-10 23:22:33.351797968 -0400
+@@ -231,6 +231,7 @@
+ i386-*-haiku*) fmt=elf em=haiku ;;
+ i386-*-genode*) fmt=elf ;;
+ i386-*-bsd*) fmt=aout em=386bsd ;;
++ i386-*-jove*) fmt=elf ;;
+ i386-*-netbsd*-gnu* | \
+ i386-*-knetbsd*-gnu | \
+ i386-*-netbsd* | \
+diff -rNau binutils-2.41/ld/configure.tgt binutils-2.41-patched/ld/configure.tgt
+--- binutils-2.41/ld/configure.tgt 2023-07-02 19:00:00.000000000 -0400
++++ binutils-2.41-patched/ld/configure.tgt 2024-03-10 23:24:16.838998259 -0400
+@@ -1053,6 +1053,9 @@
+ targ_extra_ofiles="deffilep.o pdb.o pep-dll.o pe-dll.o"
+ test "$targ" != "$host" && LIB_PATH='${tooldir}/lib/w32api'
+ ;;
++x86_64-*-jove*) targ_emul=elf_x86_64_jove
++ targ_extra_emuls="elf_x86_64"
++ ;;
+ x86_64-*-mingw*) targ_emul=i386pep ;
+ targ_extra_emuls=i386pe
+ targ_extra_ofiles="deffilep.o pdb.o pep-dll.o pe-dll.o"
+diff -rNau binutils-2.41/ld/emulparams/elf_x86_64_jove.sh binutils-2.41-patched/ld/emulparams/elf_x86_64_jove.sh
+--- binutils-2.41/ld/emulparams/elf_x86_64_jove.sh 1969-12-31 19:00:00.000000000 -0500
++++ binutils-2.41-patched/ld/emulparams/elf_x86_64_jove.sh 2024-03-10 23:25:24.152469179 -0400
+@@ -0,0 +1 @@
++source_sh ${srcdir}/emulparams/elf_x86_64.sh
+diff -rNau binutils-2.41/ld/Makefile.am binutils-2.41-patched/ld/Makefile.am
+--- binutils-2.41/ld/Makefile.am 2023-07-02 19:00:00.000000000 -0400
++++ binutils-2.41-patched/ld/Makefile.am 2024-03-10 23:26:41.812851367 -0400
+@@ -951,6 +951,7 @@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf64tilegx_be.Pc@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_mipsel_haiku.Pc@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64.Pc@am__quote@
++@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_jove.Pc@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_cloudabi.Pc@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_fbsd.Pc@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_haiku.Pc@am__quote@
+@@ -455,6 +455,7 @@
+ eelf64tilegx_be.c \
+ eelf_mipsel_haiku.c \
+ eelf_x86_64.c \
++ eelf_x86_64_jove.c \
+ eelf_x86_64_cloudabi.c \
+ eelf_x86_64_fbsd.c \
+ eelf_x86_64_haiku.c \
+
diff --git a/scripts/buildtools.mk b/scripts/buildtools.mk
new file mode 100644
index 0000000..6160d01
--- /dev/null
+++ b/scripts/buildtools.mk
@@ -0,0 +1,63 @@
+BINUTILS_VERSION := 2.41
+GCC_VERSION := 13.2.0
+TOOLCHAIN := x86_64-jove
+
+TOOLDIR := $(PWD)/tools
+SCRIPTDIR := $(PWD)/scripts
+TOOL_SRCDIR := $(TOOLDIR)/src
+TOOL_BUILDDIR := $(TOOLDIR)/build
+SYSROOT_DIR := $(PWD)/sysroot
+
+BINUTILS_ARCHIVE := binutils-$(BINUTILS_VERSION).tar.gz
+BINUTILS_URL := https://ftp.gnu.org/gnu/binutils/$(BINUTILS_ARCHIVE)
+BINUTILS_PATCHFILE := $(SCRIPTDIR)/binutils-$(BINUTILS_VERSION).diff
+BINUTILS_SRCDIR := $(TOOL_SRCDIR)/binutils-$(BINUTILS_VERSION)
+BINUTILS_BUILDDIR := $(TOOL_BUILDDIR)/binutils
+
+GCC_ARCHIVE := gcc-$(GCC_VERSION).tar.gz
+GCC_URL := https://ftp.gnu.org/gnu/gcc/gcc-$(GCC_VERSION)/$(GCC_ARCHIVE)
+GCC_PATCHFILE := $(SCRIPTDIR)/gcc-$(GCC_VERSION).diff
+GCC_SRCDIR := $(TOOL_SRCDIR)/gcc-$(GCC_VERSION)
+GCC_BUILDDIR := $(TOOL_BUILDDIR)/gcc
+
+all: $(TOOLDIR) $(BINUTILS_BUILDDIR) $(GCC_BUILDDIR)
+
+.ONESHELL:
+$(BINUTILS_BUILDDIR): $(BINUTILS_SRCDIR)
+ mkdir -p $(BINUTILS_BUILDDIR)
+ cd $(BINUTILS_BUILDDIR)
+ $(BINUTILS_SRCDIR)/configure --target=$(TOOLCHAIN) --prefix="$(TOOLDIR)" --with-sysroot=$(SYSROOT_DIR) --disable-nls --disable-werror
+ make -j4
+ make install
+
+.PHONY: $(GCC_BUILDDIR)
+.ONESHELL:
+$(GCC_BUILDDIR): $(GCC_SRCDIR)
+ mkdir -p $(GCC_BUILDDIR)
+ cd $(GCC_BUILDDIR)
+ $(GCC_SRCDIR)/configure --target=$(TOOLCHAIN) --prefix="$(TOOLDIR)" --disable-nls --enable-languages=c --with-sysroot=$(SYSROOT_DIR)
+ make all-gcc -j4
+ make all-target-libgcc -j4
+ make install-gcc
+ make install-target-libgcc
+
+$(BINUTILS_SRCDIR): $(TOOLDIR)/$(BINUTILS_ARCHIVE)
+ tar -xzvf $(TOOLDIR)/$(BINUTILS_ARCHIVE) -C $(TOOL_SRCDIR)
+ patch --directory=$(BINUTILS_SRCDIR) --strip=1 < $(BINUTILS_PATCHFILE)
+ cd $(BINUTILS_SRCDIR)/ld && automake
+
+$(GCC_SRCDIR): $(TOOLDIR)/$(GCC_ARCHIVE)
+ tar -xzvf $(TOOLDIR)/$(GCC_ARCHIVE) -C $(TOOL_SRCDIR)
+ patch --directory=$(GCC_SRCDIR) --strip=1 < $(GCC_PATCHFILE)
+ cd $(GCC_SRCDIR) && ./contrib/download_prerequisites
+
+$(TOOLDIR)/$(BINUTILS_ARCHIVE):
+ wget $(BINUTILS_URL) -O $(TOOLDIR)/$(BINUTILS_ARCHIVE)
+
+$(TOOLDIR)/$(GCC_ARCHIVE):
+ wget $(GCC_URL) -O $(TOOLDIR)/$(GCC_ARCHIVE)
+
+$(TOOLDIR):
+ mkdir -p $(TOOLDIR)
+ mkdir -p $(TOOL_SRCDIR)
+ mkdir -p $(TOOL_BUILDDIR)
diff --git a/scripts/gcc-13.2.0.diff b/scripts/gcc-13.2.0.diff
new file mode 100644
index 0000000..45dbe98
--- /dev/null
+++ b/scripts/gcc-13.2.0.diff
@@ -0,0 +1,78 @@
+diff -rNau gcc-13.2.0/config.sub gcc-13.2.0-patched/config.sub
+--- gcc-13.2.0/config.sub 2023-07-27 04:13:03.000000000 -0400
++++ gcc-13.2.0-patched/config.sub 2024-03-10 23:33:56.596289806 -0400
+@@ -1749,7 +1749,7 @@
+ | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+ | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+ | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
+- | fiwix* )
++ | fiwix* | jove* )
+ ;;
+ # This one is extra strict with allowed versions
+ sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
+diff -rNau gcc-13.2.0/fixincludes/mkfixinc.sh gcc-13.2.0-patched/fixincludes/mkfixinc.sh
+--- gcc-13.2.0/fixincludes/mkfixinc.sh 2023-07-27 04:13:03.000000000 -0400
++++ gcc-13.2.0-patched/fixincludes/mkfixinc.sh 2024-03-10 23:49:24.405547826 -0400
+@@ -20,6 +20,7 @@
+ powerpcle-*-eabisim* | \
+ powerpcle-*-eabi* | \
+ *-*-vxworks7* | \
++ *-*-jove* | \
+ *-musl* )
+ # IF there is no include fixing,
+ # THEN create a no-op fixer and exit
+diff -rNau gcc-13.2.0/gcc/config/jove.h gcc-13.2.0-patched/gcc/config/jove.h
+--- gcc-13.2.0/gcc/config/jove.h 1969-12-31 19:00:00.000000000 -0500
++++ gcc-13.2.0-patched/gcc/config/jove.h 2024-03-10 23:44:13.570083205 -0400
+@@ -0,0 +1,8 @@
++#undef TARGET_JOVE
++#define TARGET_JOVE 1
++
++#undef LIB_SPEC
++#define LIB_SPEC "-lc"
++
++#undef STARTFILE_SPEC
++#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
++
++#undef ENDFILE_SPEC
++#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+diff -rNau gcc-13.2.0/gcc/config.gcc gcc-13.2.0-patched/gcc/config.gcc
+--- gcc-13.2.0/gcc/config.gcc 2023-07-27 04:13:04.000000000 -0400
++++ gcc-13.2.0-patched/gcc/config.gcc 2024-03-10 23:42:11.659119360 -0400
+@@ -843,6 +843,12 @@
+ *-*-fuchsia*)
+ native_system_header_dir=/include
+ ;;
++*-*-jove*)
++ gas=yes
++ gnu_ld=yes
++ default_use_cxa_atexit=yes
++ use_gcc_stdint=provide
++ ;;
+ *-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu | *-*-uclinuxfdpiceabi)
+ extra_options="$extra_options gnu-user.opt"
+ gas=yes
+@@ -1891,6 +1897,9 @@
+ x86_64-*-freebsd*)
+ tm_file="${tm_file} i386/unix.h i386/att.h elfos.h ${fbsd_tm_file} i386/x86-64.h i386/freebsd.h i386/freebsd64.h"
+ ;;
++x86_64-*-jove*)
++ tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h jove.h"
++ ;;
+ i[34567]86-*-netbsdelf*)
+ tm_file="${tm_file} i386/unix.h i386/att.h elfos.h ${nbsd_tm_file} i386/netbsd-elf.h"
+ extra_options="${extra_options} netbsd.opt netbsd-elf.opt"
+diff -rNau gcc-13.2.0/libgcc/config.host gcc-13.2.0-patched/libgcc/config.host
+--- gcc-13.2.0/libgcc/config.host 2023-07-27 04:13:07.000000000 -0400
++++ gcc-13.2.0-patched/libgcc/config.host 2024-03-10 23:47:32.669386544 -0400
+@@ -386,6 +386,10 @@
+ esac
+
+ case ${host} in
++x86_64-*-jove*)
++ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
++ extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
++ ;;
+ aarch64*-*-elf | aarch64*-*-rtems*)
+ extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o"
+ extra_parts="$extra_parts crtfastmath.o"
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..7905cf3
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,29 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+ name = "jove-build-env";
+ hardeningDisable = [ "format" ];
+ buildInputs = with pkgs; [
+ # Library depends
+ gmp gmp.dev
+ isl
+ libffi libffi.dev
+ libmpc
+ libxcrypt
+ mpfr mpfr.dev
+ xz xz.dev
+ zlib zlib.dev
+
+ m4
+ bison
+ flex
+ texinfo
+
+ gcc
+ stdenv.cc
+ stdenv.cc.libc stdenv.cc.libc_dev
+
+ # Test suite
+ qemu_kvm
+ parted
+ ];
+}
diff --git a/sysroot/boot/initrd.tar b/sysroot/boot/initrd.tar
new file mode 100644
index 0000000..3165525
--- /dev/null
+++ b/sysroot/boot/initrd.tar
Binary files differ
diff --git a/sysroot/boot/limine.cfg b/sysroot/boot/limine.cfg
new file mode 100644
index 0000000..86ee54c
--- /dev/null
+++ b/sysroot/boot/limine.cfg
@@ -0,0 +1,13 @@
+${JOVE_KERNEL}=boot:///boot/jove.elf
+${INITRD}=boot:///boot/initrd.tar
+
+DEFAULT_ENTRY=1
+TIMEOUT=3
+VERBOSE=yes
+
+:Jove
+ PROTOCOL=limine
+ KERNEL_PATH=${JOVE_KERNEL}
+ KERNEL_CMDLINE=initrd=/boot/initrd.tar init=./init
+
+ MODULE_PATH=${INITRD}
diff --git a/sysroot/usr/include/errno.h b/sysroot/usr/include/errno.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/sysroot/usr/include/errno.h
diff --git a/sysroot/usr/include/stdint.h b/sysroot/usr/include/stdint.h
new file mode 100644
index 0000000..165a201
--- /dev/null
+++ b/sysroot/usr/include/stdint.h
@@ -0,0 +1,319 @@
+/* Copyright (C) 1997-2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/*
+ * ISO C99: 7.18 Integer types <stdint.h>
+ */
+
+#ifndef _STDINT_H
+#define _STDINT_H 1
+
+#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
+#include <bits/libc-header-start.h>
+#include <bits/types.h>
+#include <bits/wchar.h>
+#include <bits/wordsize.h>
+
+/* Exact integral types. */
+
+/* Signed. */
+#include <bits/stdint-intn.h>
+
+/* Unsigned. */
+#include <bits/stdint-uintn.h>
+
+
+/* Small types. */
+
+/* Signed. */
+typedef __int_least8_t int_least8_t;
+typedef __int_least16_t int_least16_t;
+typedef __int_least32_t int_least32_t;
+typedef __int_least64_t int_least64_t;
+
+/* Unsigned. */
+typedef __uint_least8_t uint_least8_t;
+typedef __uint_least16_t uint_least16_t;
+typedef __uint_least32_t uint_least32_t;
+typedef __uint_least64_t uint_least64_t;
+
+
+/* Fast types. */
+
+/* Signed. */
+typedef signed char int_fast8_t;
+#if __WORDSIZE == 64
+typedef long int int_fast16_t;
+typedef long int int_fast32_t;
+typedef long int int_fast64_t;
+#else
+typedef int int_fast16_t;
+typedef int int_fast32_t;
+__extension__
+typedef long long int int_fast64_t;
+#endif
+
+/* Unsigned. */
+typedef unsigned char uint_fast8_t;
+#if __WORDSIZE == 64
+typedef unsigned long int uint_fast16_t;
+typedef unsigned long int uint_fast32_t;
+typedef unsigned long int uint_fast64_t;
+#else
+typedef unsigned int uint_fast16_t;
+typedef unsigned int uint_fast32_t;
+__extension__
+typedef unsigned long long int uint_fast64_t;
+#endif
+
+
+/* Types for `void *' pointers. */
+#if __WORDSIZE == 64
+# ifndef __intptr_t_defined
+typedef long int intptr_t;
+# define __intptr_t_defined
+# endif
+typedef unsigned long int uintptr_t;
+#else
+# ifndef __intptr_t_defined
+typedef int intptr_t;
+# define __intptr_t_defined
+# endif
+typedef unsigned int uintptr_t;
+#endif
+
+
+/* Largest integral types. */
+typedef __intmax_t intmax_t;
+typedef __uintmax_t uintmax_t;
+
+
+# if __WORDSIZE == 64
+# define __INT64_C(c) c ## L
+# define __UINT64_C(c) c ## UL
+# else
+# define __INT64_C(c) c ## LL
+# define __UINT64_C(c) c ## ULL
+# endif
+
+/* Limits of integral types. */
+
+/* Minimum of signed integral types. */
+# define INT8_MIN (-128)
+# define INT16_MIN (-32767-1)
+# define INT32_MIN (-2147483647-1)
+# define INT64_MIN (-__INT64_C(9223372036854775807)-1)
+/* Maximum of signed integral types. */
+# define INT8_MAX (127)
+# define INT16_MAX (32767)
+# define INT32_MAX (2147483647)
+# define INT64_MAX (__INT64_C(9223372036854775807))
+
+/* Maximum of unsigned integral types. */
+# define UINT8_MAX (255)
+# define UINT16_MAX (65535)
+# define UINT32_MAX (4294967295U)
+# define UINT64_MAX (__UINT64_C(18446744073709551615))
+
+
+/* Minimum of signed integral types having a minimum size. */
+# define INT_LEAST8_MIN (-128)
+# define INT_LEAST16_MIN (-32767-1)
+# define INT_LEAST32_MIN (-2147483647-1)
+# define INT_LEAST64_MIN (-__INT64_C(9223372036854775807)-1)
+/* Maximum of signed integral types having a minimum size. */
+# define INT_LEAST8_MAX (127)
+# define INT_LEAST16_MAX (32767)
+# define INT_LEAST32_MAX (2147483647)
+# define INT_LEAST64_MAX (__INT64_C(9223372036854775807))
+
+/* Maximum of unsigned integral types having a minimum size. */
+# define UINT_LEAST8_MAX (255)
+# define UINT_LEAST16_MAX (65535)
+# define UINT_LEAST32_MAX (4294967295U)
+# define UINT_LEAST64_MAX (__UINT64_C(18446744073709551615))
+
+
+/* Minimum of fast signed integral types having a minimum size. */
+# define INT_FAST8_MIN (-128)
+# if __WORDSIZE == 64
+# define INT_FAST16_MIN (-9223372036854775807L-1)
+# define INT_FAST32_MIN (-9223372036854775807L-1)
+# else
+# define INT_FAST16_MIN (-2147483647-1)
+# define INT_FAST32_MIN (-2147483647-1)
+# endif
+# define INT_FAST64_MIN (-__INT64_C(9223372036854775807)-1)
+/* Maximum of fast signed integral types having a minimum size. */
+# define INT_FAST8_MAX (127)
+# if __WORDSIZE == 64
+# define INT_FAST16_MAX (9223372036854775807L)
+# define INT_FAST32_MAX (9223372036854775807L)
+# else
+# define INT_FAST16_MAX (2147483647)
+# define INT_FAST32_MAX (2147483647)
+# endif
+# define INT_FAST64_MAX (__INT64_C(9223372036854775807))
+
+/* Maximum of fast unsigned integral types having a minimum size. */
+# define UINT_FAST8_MAX (255)
+# if __WORDSIZE == 64
+# define UINT_FAST16_MAX (18446744073709551615UL)
+# define UINT_FAST32_MAX (18446744073709551615UL)
+# else
+# define UINT_FAST16_MAX (4294967295U)
+# define UINT_FAST32_MAX (4294967295U)
+# endif
+# define UINT_FAST64_MAX (__UINT64_C(18446744073709551615))
+
+
+/* Values to test for integral types holding `void *' pointer. */
+# if __WORDSIZE == 64
+# define INTPTR_MIN (-9223372036854775807L-1)
+# define INTPTR_MAX (9223372036854775807L)
+# define UINTPTR_MAX (18446744073709551615UL)
+# else
+# define INTPTR_MIN (-2147483647-1)
+# define INTPTR_MAX (2147483647)
+# define UINTPTR_MAX (4294967295U)
+# endif
+
+
+/* Minimum for largest signed integral type. */
+# define INTMAX_MIN (-__INT64_C(9223372036854775807)-1)
+/* Maximum for largest signed integral type. */
+# define INTMAX_MAX (__INT64_C(9223372036854775807))
+
+/* Maximum for largest unsigned integral type. */
+# define UINTMAX_MAX (__UINT64_C(18446744073709551615))
+
+
+/* Limits of other integer types. */
+
+/* Limits of `ptrdiff_t' type. */
+# if __WORDSIZE == 64
+# define PTRDIFF_MIN (-9223372036854775807L-1)
+# define PTRDIFF_MAX (9223372036854775807L)
+# else
+# if __WORDSIZE32_PTRDIFF_LONG
+# define PTRDIFF_MIN (-2147483647L-1)
+# define PTRDIFF_MAX (2147483647L)
+# else
+# define PTRDIFF_MIN (-2147483647-1)
+# define PTRDIFF_MAX (2147483647)
+# endif
+# endif
+
+/* Limits of `sig_atomic_t'. */
+# define SIG_ATOMIC_MIN (-2147483647-1)
+# define SIG_ATOMIC_MAX (2147483647)
+
+/* Limit of `size_t' type. */
+# if __WORDSIZE == 64
+# define SIZE_MAX (18446744073709551615UL)
+# else
+# if __WORDSIZE32_SIZE_ULONG
+# define SIZE_MAX (4294967295UL)
+# else
+# define SIZE_MAX (4294967295U)
+# endif
+# endif
+
+/* Limits of `wchar_t'. */
+# ifndef WCHAR_MIN
+/* These constants might also be defined in <wchar.h>. */
+# define WCHAR_MIN __WCHAR_MIN
+# define WCHAR_MAX __WCHAR_MAX
+# endif
+
+/* Limits of `wint_t'. */
+# define WINT_MIN (0u)
+# define WINT_MAX (4294967295u)
+
+/* Signed. */
+# define INT8_C(c) c
+# define INT16_C(c) c
+# define INT32_C(c) c
+# if __WORDSIZE == 64
+# define INT64_C(c) c ## L
+# else
+# define INT64_C(c) c ## LL
+# endif
+
+/* Unsigned. */
+# define UINT8_C(c) c
+# define UINT16_C(c) c
+# define UINT32_C(c) c ## U
+# if __WORDSIZE == 64
+# define UINT64_C(c) c ## UL
+# else
+# define UINT64_C(c) c ## ULL
+# endif
+
+/* Maximal type. */
+# if __WORDSIZE == 64
+# define INTMAX_C(c) c ## L
+# define UINTMAX_C(c) c ## UL
+# else
+# define INTMAX_C(c) c ## LL
+# define UINTMAX_C(c) c ## ULL
+# endif
+
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
+
+# define INT8_WIDTH 8
+# define UINT8_WIDTH 8
+# define INT16_WIDTH 16
+# define UINT16_WIDTH 16
+# define INT32_WIDTH 32
+# define UINT32_WIDTH 32
+# define INT64_WIDTH 64
+# define UINT64_WIDTH 64
+
+# define INT_LEAST8_WIDTH 8
+# define UINT_LEAST8_WIDTH 8
+# define INT_LEAST16_WIDTH 16
+# define UINT_LEAST16_WIDTH 16
+# define INT_LEAST32_WIDTH 32
+# define UINT_LEAST32_WIDTH 32
+# define INT_LEAST64_WIDTH 64
+# define UINT_LEAST64_WIDTH 64
+
+# define INT_FAST8_WIDTH 8
+# define UINT_FAST8_WIDTH 8
+# define INT_FAST16_WIDTH __WORDSIZE
+# define UINT_FAST16_WIDTH __WORDSIZE
+# define INT_FAST32_WIDTH __WORDSIZE
+# define UINT_FAST32_WIDTH __WORDSIZE
+# define INT_FAST64_WIDTH 64
+# define UINT_FAST64_WIDTH 64
+
+# define INTPTR_WIDTH __WORDSIZE
+# define UINTPTR_WIDTH __WORDSIZE
+
+# define INTMAX_WIDTH 64
+# define UINTMAX_WIDTH 64
+
+# define PTRDIFF_WIDTH __WORDSIZE
+# define SIG_ATOMIC_WIDTH 32
+# define SIZE_WIDTH __WORDSIZE
+# define WCHAR_WIDTH 32
+# define WINT_WIDTH 32
+
+#endif
+
+#endif /* stdint.h */
diff --git a/sysroot/usr/include/stdio.h b/sysroot/usr/include/stdio.h
new file mode 100644
index 0000000..f1f8470
--- /dev/null
+++ b/sysroot/usr/include/stdio.h
@@ -0,0 +1,26 @@
+#ifndef _STDIO_H
+#define _STDIO_H 1
+
+#include <stdarg.h>
+#include <stddef.h>
+
+#define SEEK_SET 0
+typedef struct { int unused; } FILE;
+
+extern FILE *stderr;
+#define stderr stderr
+
+int fclose(FILE *file);
+int fflush(FILE *file);
+FILE *fopen(const char *path, const char *flags);
+
+size_t fread(void *buf, size_t size, size_t nmemb, FILE* file);
+int fseek(FILE *file, long offset, int whence);
+long ftell(FILE *file);
+size_t fwrite(const void *buf, size_t size, size_t nmemb, FILE *file);
+void setbuf(FILE *file, char *buf);
+
+int fprintf(FILE *file, const char *fmt, ...);
+int vfprintf(FILE *file, const char *fmt, va_list ap);
+
+#endif
diff --git a/sysroot/usr/include/stdlib.h b/sysroot/usr/include/stdlib.h
new file mode 100644
index 0000000..f29cce7
--- /dev/null
+++ b/sysroot/usr/include/stdlib.h
@@ -0,0 +1,17 @@
+#ifndef _STDLIB_H
+#define _STDLIB_H 1
+
+#include <stddef.h>
+
+__attribute__((noreturn)) void abort(void);
+int atexit(void (*callback)(void));
+
+int atoi(const char*);
+
+void free(void *ptr);
+void *malloc(size_t size);
+void *calloc(size_t nmemb, size_t size);
+
+char *getenv(const char *key);
+
+#endif
diff --git a/sysroot/usr/include/string.h b/sysroot/usr/include/string.h
new file mode 100644
index 0000000..d55bc37
--- /dev/null
+++ b/sysroot/usr/include/string.h
@@ -0,0 +1,11 @@
+#ifndef _STRING_H
+#define _STRING_H 1
+
+#include <stddef.h>
+
+void *memcpy(void *dest, const void *src, size_t size);
+void *memset(void *dest, int byte, size_t size);
+char *strcpy(char *dest, const char *src);
+size_t strlen(const char *str);
+
+#endif
diff --git a/sysroot/usr/include/sys/types.h b/sysroot/usr/include/sys/types.h
new file mode 100644
index 0000000..058c38a
--- /dev/null
+++ b/sysroot/usr/include/sys/types.h
@@ -0,0 +1,6 @@
+#ifndef _SYS_TYPES_H
+#define _SYS_TYPES_H 1
+
+typedef int pid_t;
+
+#endif
diff --git a/sysroot/usr/include/time.h b/sysroot/usr/include/time.h
new file mode 100644
index 0000000..c73ee97
--- /dev/null
+++ b/sysroot/usr/include/time.h
@@ -0,0 +1,4 @@
+#ifndef _TIME_H
+#define _TIME_H 1
+
+#endif
diff --git a/sysroot/usr/include/unistd.h b/sysroot/usr/include/unistd.h
new file mode 100644
index 0000000..4e14be9
--- /dev/null
+++ b/sysroot/usr/include/unistd.h
@@ -0,0 +1,11 @@
+#ifndef _UNISTD_H
+#define _UNISTD_H 1
+
+#include <sys/types.h>
+
+int execv(const char *pathname, char *const argv[]);
+int execve(const char *pathname, char *const argv[], char *const envp[]);
+int execvp(const char *pathname, char *const argv[]);
+pid_t fork(void);
+
+#endif