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build: Generally rework build system to easily allow 3rd party toolchains to be used. Drop reliance on libgcc for BIOS builds by shipping our own routines instead

This commit is contained in:
mintsuki 2021-04-03 00:48:38 +02:00
parent 74ef5901a7
commit 8e4de054d7
9 changed files with 101 additions and 87 deletions
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7
.github/workflows/main.yml vendored
View File

@ -25,11 +25,8 @@ jobs:
- name: Install dependencies
run: sudo apt-get update && sudo apt-get install git build-essential nasm gcc-mingw-w64 gcc-multilib wget mtools -y
- name: Build the toolchain (BIOS)
run: make toolchain-bios
- name: Build the toolchain (UEFI)
run: make toolchain-uefi
- name: Build the toolchain
run: make toolchain
- name: Build the bootloader
run: make

17
Makefile
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@ -2,6 +2,8 @@ CC = cc
PREFIX = /usr/local
DESTDIR =
TOOLCHAIN = x86_64-elf
PATH := $(shell pwd)/toolchain/bin:$(PATH)
.PHONY: all bin/limine-install clean install distclean limine-bios limine-uefi limine-bios-clean limine-uefi-clean stage23-bios stage23-bios-clean stage23-uefi stage23-uefi-clean decompressor decompressor-clean toolchain test.hdd echfs-test ext2-test fat16-test fat32-test iso9660-test iso9660-uefi-test pxe-test uefi-test hybrid-iso9660-test
@ -84,19 +86,12 @@ test-clean:
rm -rf test_image test.hdd test.iso
toolchain:
$(MAKE) toolchain-bios
$(MAKE) toolchain-uefi
toolchain-bios:
scripts/make_toolchain_bios.sh "`realpath ./toolchain`" -j`nproc`
toolchain-uefi:
scripts/make_toolchain_uefi.sh "`realpath ./toolchain`" -j`nproc`
scripts/make_toolchain.sh "`realpath ./toolchain`" -j`nproc`
gnu-efi:
git clone https://git.code.sf.net/p/gnu-efi/code --branch=3.0.12 --depth=1 $@
$(MAKE) -C gnu-efi/gnuefi CC=x86_64-elf-gcc AR=x86_64-elf-ar
$(MAKE) -C gnu-efi/lib CC=x86_64-elf-gcc ARCH=x86_64 x86_64/efi_stub.o
git clone https://git.code.sf.net/p/gnu-efi/code --branch=3.0.13 --depth=1 $@
$(MAKE) -C gnu-efi/gnuefi CC="$(TOOLCHAIN)-gcc -m64" AR=$(TOOLCHAIN)-ar
$(MAKE) -C gnu-efi/lib CC="$(TOOLCHAIN)-gcc -m64" ARCH=x86_64 x86_64/efi_stub.o
ovmf:
mkdir -p ovmf

18
decompressor/Makefile
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@ -1,19 +1,23 @@
CC = i386-elf-gcc
LD = i386-elf-gcc
OBJCOPY = i386-elf-objcopy
BUILDDIR =
ifeq ($(BUILDDIR), )
$(error BUILDDIR not specified)
endif
TOOLCHAIN = x86_64-elf
CC = $(TOOLCHAIN)-gcc
OBJCOPY = $(TOOLCHAIN)-objcopy
CFLAGS = -flto -Os -pipe -Wall -Wextra -Werror
INTERNAL_CFLAGS = \
-m32 \
-std=gnu11 \
-ffreestanding \
-fno-stack-protector \
-fno-pic \
-fno-pie \
-fomit-frame-pointer \
-Wno-address-of-packed-member \
-masm=intel \
@ -24,10 +28,12 @@ INTERNAL_CFLAGS = \
LDFLAGS = -flto -Os
INTERNAL_LDFLAGS = \
-lgcc \
-static-libgcc \
-m32 \
-Wl,-melf_i386 \
-nostdlib \
-no-pie \
-fno-pic \
-fno-pie \
-z max-page-size=0x1000 \
-static \
-Tlinker.ld
@ -47,7 +53,7 @@ builddir:
for i in $(OBJ); do mkdir -p `dirname $$i`; done
$(BUILDDIR)/decompressor.bin: $(OBJ)
$(LD) $(OBJ) $(LDFLAGS) $(INTERNAL_LDFLAGS) -o $(BUILDDIR)/decompressor.elf
$(CC) $(OBJ) $(LDFLAGS) $(INTERNAL_LDFLAGS) -o $(BUILDDIR)/decompressor.elf
$(OBJCOPY) -O binary $(BUILDDIR)/decompressor.elf $@
-include $(HEADER_DEPS)

6
scripts/make_toolchain_uefi.sh → scripts/make_toolchain.sh
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@ -7,6 +7,8 @@ TARGET=x86_64-elf
BINUTILSVERSION=2.36.1
GCCVERSION=10.2.0
CFLAGS="-O2 -pipe"
mkdir -p "$1" && cd "$1"
PREFIX="$(pwd)"
@ -30,7 +32,7 @@ tar -xf ../gcc-$GCCVERSION.tar.gz
mkdir build-binutils
cd build-binutils
../binutils-$BINUTILSVERSION/configure --target=$TARGET --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror --enable-targets=x86_64-elf,x86_64-pe --enable-64-bit-bfd
../binutils-$BINUTILSVERSION/configure CFLAGS="$CFLAGS" CXXFLAGS="$CFLAGS" --target=$TARGET --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror --enable-targets=x86_64-elf,x86_64-pe
make
make install
cd ..
@ -40,7 +42,7 @@ contrib/download_prerequisites
cd ..
mkdir build-gcc
cd build-gcc
../gcc-$GCCVERSION/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c --without-headers
../gcc-$GCCVERSION/configure CFLAGS="$CFLAGS" CXXFLAGS="$CFLAGS" --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c --without-headers
make all-gcc
make all-target-libgcc
make install-gcc

48
scripts/make_toolchain_bios.sh
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@ -1,48 +0,0 @@
#!/bin/sh
set -e
set -x
TARGET=i386-elf
BINUTILSVERSION=2.36.1
GCCVERSION=10.2.0
mkdir -p "$1" && cd "$1"
PREFIX="$(pwd)"
export MAKEFLAGS="$2"
export PATH="$PREFIX/bin:$PATH"
if [ ! -f binutils-$BINUTILSVERSION.tar.gz ]; then
wget https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILSVERSION.tar.gz
fi
if [ ! -f gcc-$GCCVERSION.tar.gz ]; then
wget https://ftp.gnu.org/gnu/gcc/gcc-$GCCVERSION/gcc-$GCCVERSION.tar.gz
fi
rm -rf build
mkdir build
cd build
tar -xf ../binutils-$BINUTILSVERSION.tar.gz
tar -xf ../gcc-$GCCVERSION.tar.gz
mkdir build-binutils
cd build-binutils
../binutils-$BINUTILSVERSION/configure --target=$TARGET --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror --enable-64-bit-bfd
make
make install
cd ..
cd gcc-$GCCVERSION
contrib/download_prerequisites
cd ..
mkdir build-gcc
cd build-gcc
../gcc-$GCCVERSION/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c --without-headers
make all-gcc
make all-target-libgcc
make install-gcc
make install-target-libgcc
cd ..

30
stage23/Makefile
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@ -6,13 +6,15 @@ ifeq ($(BUILDDIR), )
endif
ifeq ($(TARGET), bios)
TOOLCHAIN=i386-elf
OBJCOPY_ARCH = elf32-i386
else ifeq ($(TARGET), uefi)
TOOLCHAIN=x86_64-elf
OBJCOPY_ARCH = elf64-x86-64
else
$(error Invalid target)
endif
TOOLCHAIN = x86_64-elf
CC = $(TOOLCHAIN)-gcc
OBJCOPY = $(TOOLCHAIN)-objcopy
OBJDUMP = $(TOOLCHAIN)-objdump
@ -49,15 +51,25 @@ INTERNAL_CFLAGS := \
ifeq ($(TARGET), bios)
INTERNAL_CFLAGS += \
-m32 \
-march=i386 \
-fno-pie
endif
ifeq ($(TARGET), uefi)
INTERNAL_CFLAGS += \
-m64 \
-march=x86-64 \
-I../gnu-efi/inc \
-I../gnu-efi/inc/x86_64 \
-fpie \
-mno-red-zone
INTERNAL_CFLAGS32 := \
$(INTERNAL_CFLAGS) \
-m32 \
-march=i386 \
-fpie
endif
LDFLAGS = -O3 -g
@ -70,15 +82,17 @@ INTERNAL_LDFLAGS := \
ifeq ($(TARGET), bios)
INTERNAL_LDFLAGS += \
-m32 \
-Wl,-melf_i386 \
-static \
-no-pie \
-fno-pie \
-lgcc \
-static-libgcc
-fno-pie
endif
ifeq ($(TARGET), uefi)
INTERNAL_LDFLAGS += \
-m64 \
-Wl,-melf_x86_64 \
-shared \
-Wl,-Bsymbolic \
-Wl,--noinhibit-exec \
@ -117,11 +131,11 @@ $(BUILDDIR)/sys/smp_trampoline.bin: sys/smp_trampoline.real
$(BUILDDIR)/sys/smp_trampoline.o: $(BUILDDIR)/sys/smp_trampoline.bin
cd "`dirname $<`" && \
$(OBJCOPY) -B i8086 -I binary -O default "`basename $<`" $@
$(OBJCOPY) -B i8086 -I binary -O $(OBJCOPY_ARCH) "`basename $<`" $@
$(BUILDDIR)/font.o: font.bin
cd "`dirname $<`" && \
$(OBJCOPY) -B i8086 -I binary -O default "`basename $<`" $@
$(OBJCOPY) -B i8086 -I binary -O $(OBJCOPY_ARCH) "`basename $<`" $@
ifeq ($(TARGET), bios)
@ -191,7 +205,7 @@ endif
ifeq ($(TARGET), uefi)
$(BUILDDIR)/%.32.o: %.32.c
$(CC) -m32 $(CFLAGS) $(INTERNAL_CFLAGS) -c $< -o $@.32
$(CC) $(CFLAGS) $(INTERNAL_CFLAGS32) -c $< -o $@.32
$(OBJCOPY) -I elf32-i386 -O elf64-x86-64 $@.32 $@
rm $@.32
endif

1
stage23/lib/libc.s2.c
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@ -1,7 +1,6 @@
#include <stddef.h>
#include <stdint.h>
#include <lib/libc.h>
#include <limits.h>
#include <stdbool.h>
#include <lib/blib.h>

55
stage23/lib/libgcc.s2.asm Normal file
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@ -0,0 +1,55 @@
section .text
global __udivdi3
__udivdi3:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
div dword [esp+12]
xor edx, edx
ret
global __divdi3
__divdi3:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
idiv dword [esp+12]
xor edx, edx
ret
global __umoddi3
__umoddi3:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
div dword [esp+12]
mov eax, edx
xor edx, edx
ret
global __moddi3
__moddi3:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
idiv dword [esp+12]
mov eax, edx
xor edx, edx
ret
global __udivmoddi4
__udivmoddi4:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
div dword [esp+12]
mov ecx, dword [esp+20]
mov dword [ecx], edx
xor edx, edx
ret
global __udivmoddi4
__divmoddi4:
mov eax, dword [esp+4]
mov edx, dword [esp+8]
idiv dword [esp+12]
mov ecx, dword [esp+20]
mov dword [ecx], edx
xor edx, edx
ret

6
tinf/tinflate.c
View File

@ -25,12 +25,6 @@
#include "tinf.h"
#include <limits.h>
#if defined(UINT_MAX) && (UINT_MAX) < 0xFFFFFFFFUL
# error "tinf requires unsigned int to be at least 32-bit"
#endif
/* -- Internal data structures -- */
struct tinf_tree {