system/boot: Add support for multiple bootloaders

This commit is contained in:
Jessica Hamilton
2018-10-17 14:47:46 -05:00
committed by Alexander von Gluck IV
parent f15270537a
commit 1f96a3cbde
41 changed files with 754 additions and 551 deletions
+62 -40
View File
@@ -239,13 +239,15 @@ rule KernelArchitectureSetup architecture
switch $(cpu) {
case ppc :
HAIKU_BOOT_PLATFORM ?= openfirmware ;
HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 2880 ; # in kB
HAIKU_KERNEL_PLATFORM ?= openfirmware ;
HAIKU_BOOT_TARGETS += openfirmware ;
HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 1440 ; # in kB
# offset in floppy image (>= sizeof(haiku_loader))
HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 384 ; # in kB
case arm :
HAIKU_BOOT_PLATFORM ?= u-boot ;
HAIKU_KERNEL_PLATFORM ?= u-boot ;
HAIKU_BOOT_TARGETS += u-boot ;
HAIKU_BOOT_SDIMAGE_SIZE ?= 128 ;
# SOC's like allwinner need an offset to skip the hardcoded initial loader
@@ -269,7 +271,9 @@ rule KernelArchitectureSetup architecture
HAIKU_BOOT_LOADER_BASE ?= 0x1000000 ;
case x86 :
HAIKU_BOOT_PLATFORM ?= bios_ia32 ;
HAIKU_KERNEL_PLATFORM ?= bios_ia32 ;
HAIKU_BOOT_TARGETS += bios_ia32 pxe_ia32 ;
HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 2880 ; # in kB
# offset in floppy image (>= sizeof(haiku_loader))
HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 320 ; # in kB
@@ -280,8 +284,10 @@ rule KernelArchitectureSetup architecture
}
case x86_64 :
# x86_64 completely shares the x86 bootloader.
HAIKU_BOOT_PLATFORM ?= bios_ia32 ;
# x86_64 completely shares the x86 bootloader for MBR.
HAIKU_KERNEL_PLATFORM ?= bios_ia32 ;
HAIKU_BOOT_TARGETS += bios_ia32 efi pxe_ia32 ;
HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 2880 ; # in kB
# offset in floppy image (>= sizeof(haiku_loader))
HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET = 320 ; # in kB
@@ -295,8 +301,9 @@ rule KernelArchitectureSetup architecture
}
case m68k :
HAIKU_BOOT_PLATFORM ?= atari_m68k ;
switch $(HAIKU_BOOT_PLATFORM) {
HAIKU_KERNEL_PLATFORM ?= atari_m68k ;
HAIKU_BOOT_TARGETS += atari_m68k ;
switch $(HAIKU_KERNEL_PLATFORM) {
case atari_m68k :
{
HAIKU_BOOT_FLOPPY_IMAGE_SIZE = 1440 ; # in kB
@@ -319,7 +326,7 @@ rule KernelArchitectureSetup architecture
# private kernel headers to be used when compiling kernel code
HAIKU_PRIVATE_KERNEL_HEADERS =
[ PrivateHeaders $(DOT) kernel libroot shared
kernel/boot/platform/$(HAIKU_BOOT_PLATFORM) ]
kernel/boot/platform/$(HAIKU_KERNEL_PLATFORM) ]
[ ArchHeaders $(HAIKU_KERNEL_ARCH) ]
[ FDirName $(HAIKU_COMMON_DEBUG_OBJECT_DIR_$(architecture)) system
kernel ]
@@ -379,11 +386,8 @@ rule KernelArchitectureSetup architecture
HAIKU_KERNEL_C++FLAGS += -mtune=68020-60 ;
case x86 :
# EFI Bootloader
if $(HAIKU_BOOT_PLATFORM) = efi {
HAIKU_BOOT_CCFLAGS += -mno-red-zone -maccumulate-outgoing-args ;
HAIKU_BOOT_C++FLAGS += -mno-red-zone -maccumulate-outgoing-args ;
}
HAIKU_KERNEL_CCFLAGS += -march=pentium ;
HAIKU_KERNEL_C++FLAGS += -march=pentium ;
case x86_64 :
# Kernel lives in the top 2GB of the address space, use kernel code
@@ -398,23 +402,6 @@ rule KernelArchitectureSetup architecture
HAIKU_KERNEL_PIC_LINKFLAGS += -z max-page-size=0x1000 ;
HAIKU_KERNEL_ADDON_LINKFLAGS += -z max-page-size=0x1000 ;
# BIOS Bootloader is 32-bit.
if $(HAIKU_BOOT_PLATFORM) = bios_ia32 {
if $(HAIKU_CC_IS_CLANG_$(architecture)) = 1 {
HAIKU_BOOT_LINKFLAGS += -m elf_i386 ;
} else {
HAIKU_BOOT_LINKFLAGS += -m elf_i386_haiku ;
}
HAIKU_BOOT_CCFLAGS += -m32 -march=pentium ;
HAIKU_BOOT_C++FLAGS += -m32 -march=pentium ;
}
# EFI Bootloader
if $(HAIKU_BOOT_PLATFORM) = efi {
HAIKU_BOOT_CCFLAGS += -mno-red-zone -maccumulate-outgoing-args ;
HAIKU_BOOT_C++FLAGS += -mno-red-zone -maccumulate-outgoing-args ;
}
if x86 in $(HAIKU_ARCHS[2-]) || x86_gcc2 in $(HAIKU_ARCHS[2-]) {
Echo "Enable kernel ia32 compatibility" ;
HAIKU_KERNEL_DEFINES += _COMPAT_MODE ;
@@ -422,15 +409,50 @@ rule KernelArchitectureSetup architecture
}
}
if $(HAIKU_BOOT_PLATFORM) = efi {
HAIKU_BOOT_CCFLAGS += -fpic -fno-stack-protector -fPIC -fshort-wchar
-Wno-error=unused-variable ;
HAIKU_BOOT_C++FLAGS += -fpic -fno-stack-protector -fPIC -fshort-wchar
-Wno-error=unused-variable ;
HAIKU_BOOT_LDFLAGS = -Bstatic -Bsymbolic -shared -nostdlib -znocombreloc -nostartfiles -no-undefined ;
} else {
HAIKU_BOOT_CCFLAGS += -fno-pic ;
HAIKU_BOOT_C++FLAGS += -fno-pic ;
local bootTarget ;
for bootTarget in $(HAIKU_BOOT_TARGETS) {
switch $(bootTarget) {
case efi :
# efi bootloader is PIC
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -fpic -fno-stack-protector
-fPIC -fshort-wchar -mno-red-zone -maccumulate-outgoing-args
-Wno-error=unused-variable -Wno-error=main ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -fpic -fno-stack-protector
-fPIC -fshort-wchar -mno-red-zone -maccumulate-outgoing-args
-Wno-error=unused-variable -Wno-error=main ;
HAIKU_BOOT_$(bootTarget:U)_LDFLAGS = -Bstatic -Bsymbolic
-nostdlib -znocombreloc -nostartfiles -no-undefined ;
case bios_ia32 :
# bios_ia32 is non-PIC
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -fno-pic -march=pentium ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -fno-pic -march=pentium ;
if $(HAIKU_CC_IS_CLANG_$(architecture)) = 1 {
HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386 ;
} else {
HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386_haiku ;
}
if $(gccVersion[1]) >= 3 {
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -Wno-error=main -m32 ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -Wno-error=main -m32 ;
}
case pxe_ia32 :
# pxe_ia32 is non-PIC
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -fno-pic -march=pentium ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -fno-pic -march=pentium ;
if $(HAIKU_CC_IS_CLANG_$(architecture)) = 1 {
HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386 ;
} else {
HAIKU_BOOT_$(bootTarget:U)_LDFLAGS += -m elf_i386_haiku ;
}
if $(gccVersion[1]) >= 3 {
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -Wno-error=main -m32 ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -Wno-error=main -m32 ;
}
case * :
# all other bootloaders are non-PIC
HAIKU_BOOT_$(bootTarget:U)_CCFLAGS += -fno-pic -Wno-error=main ;
HAIKU_BOOT_$(bootTarget:U)_C++FLAGS += -fno-pic -Wno-error=main ;
}
}
# warning flags
+86 -15
View File
@@ -1,10 +1,72 @@
rule MultiBootSubDirSetup bootTargets
{
local result ;
local bootTarget ;
bootTargets ?= $(HAIKU_BOOT_TARGETS) ;
for bootTarget in $(bootTargets) {
local bootTargetObject = $(bootTarget:G=<boot-target-object>) ;
result += $(bootTargetObject) ;
TARGET_BOOT_PLATFORM on $(bootTargetObject) = $(bootTarget) ;
SOURCE_GRIST on $(bootTargetObject)
= $(SOURCE_GRIST:E=)!$(bootTarget) ;
HDRGRIST on $(bootTargetObject)
= $(HDRGRIST:E=)!$(bootTarget) ;
local var ;
for var in TARGET_ARCH {
$(var) on $(architectureObject) = $($(var)_$(architecture)) ;
}
# Clone the current config variable values and the variables SubDir
# resets.
for var in $(AUTO_SET_UP_CONFIG_VARIABLES) SUBDIR$(SUBDIRRESET) {
$(var) on $(architectureObject) = $($(var)) ;
}
local hostTarget = HOST TARGET ;
local objectDirVars =
COMMON_ARCH COMMON_DEBUG DEBUG_$(HAIKU_DEBUG_LEVELS)
;
objectDirVars =
COMMON_PLATFORM_LOCATE_TARGET
$(hostTarget)_$(objectDirVars)_LOCATE_TARGET
LOCATE_TARGET
LOCATE_SOURCE
SEARCH_SOURCE
;
for var in $(objectDirVars) {
$(var) on $(bootTargetObject) = ;
}
on $(bootTargetObject) {
SetupObjectsDir ;
SetupFeatureObjectsDir $(bootTarget) ;
for var in $(objectDirVars) {
$(var) on $(bootTargetObject) = $($(var)) ;
}
}
}
return $(result) ;
}
rule MultiBootGristFiles files
{
return $(files:G=$(TARGET_BOOT_PLATFORM)) ;
}
rule SetupBoot
{
# Usage SetupBoot <sources_or_objects> : <extra_cc_flags> : <include_private_headers> ;
#
# <sources_or_objects> - Ideally sources, otherwise HDRSEARCH can not be
# set for the sources and the sources some header
# dependencies might be missing.
# set for the sources and the sources some header
# dependencies might be missing.
local sources = [ FGristFiles $(1) ] ;
local objects = $(sources:S=$(SUFOBJ)) ;
@@ -19,20 +81,27 @@ rule SetupBoot
$(HAIKU_BOOT_C++_HEADERS_DIR_$(TARGET_PACKAGING_ARCH)) ;
}
# MultiBootSubDirSetup sets the target boot platform on the target object,
# so this will be correct here in SetupBoot.
# This does mean, however, that MultiBootSubDirSetup needs to be used in
# all Jamfiles for things to work correctly.
# Also means ArchitectureRules need to use platform specific variables,
# rather than the previously generic TARGET_BOOT_CCFLAGS and friends.
local platform = $(TARGET_BOOT_PLATFORM:U) ;
local object ;
for object in $(objects) {
# add boot flags for the object
ObjectCcFlags $(object) : $(TARGET_BOOT_CCFLAGS) $(2) ;
ObjectC++Flags $(object) : $(TARGET_BOOT_C++FLAGS) $(2) ;
ObjectCcFlags $(object) : $(HAIKU_BOOT_CCFLAGS) $(HAIKU_BOOT_$(platform)_CCFLAGS) $(2) ;
ObjectC++Flags $(object) : $(HAIKU_BOOT_C++FLAGS) $(HAIKU_BOOT_$(platform)_C++FLAGS) $(2) ;
ObjectDefines $(object) : $(TARGET_KERNEL_DEFINES) ;
ASFLAGS on $(object) = $(TARGET_BOOT_CCFLAGS) ;
ASFLAGS on $(object) = $(HAIKU_BOOT_$(platform)_CCFLAGS) ;
# override warning flags
TARGET_WARNING_CCFLAGS_$(TARGET_PACKAGING_ARCH) on $(object)
= $(TARGET_KERNEL_WARNING_CCFLAGS) ;
TARGET_WARNING_C++FLAGS_$(TARGET_PACKAGING_ARCH) on $(object)
= $(TARGET_KERNEL_WARNING_C++FLAGS) ;
}
}
}
rule BootObjects
@@ -47,18 +116,20 @@ rule BootLd
LINK on $(1) = $(TARGET_LD_$(TARGET_PACKAGING_ARCH)) ;
LINKFLAGS on $(1) = $(TARGET_BOOT_LINKFLAGS) $(4) ;
LINKFLAGS on $(1) = $(HAIKU_BOOT_$(TARGET_BOOT_PLATFORM:U)_LDFLAGS) $(4) ;
if $(3) { LINKFLAGS on $(1) += --script=$(3) ; }
# Remove any preset LINKLIBS, but link against libgcc.a. Linking against
# libsupc++ is opt-out.
local libs ;
if ! [ on $(1) return $(HAIKU_NO_LIBSUPC++) ] {
libs += [ TargetBootLibsupc++ true ] ;
Depends $(1) : [ TargetBootLibsupc++ ] ;
if $(TARGET_BOOT_PLATFORM) != efi {
local libs ;
if ! [ on $(1) return $(HAIKU_NO_LIBSUPC++) ] {
libs += [ TargetBootLibsupc++ true ] ;
Depends $(1) : [ TargetBootLibsupc++ ] ;
}
LINKLIBS on $(1) = $(libs) [ TargetBootLibgcc true ] ;
Depends $(1) : [ TargetBootLibgcc ] ;
}
LINKLIBS on $(1) = $(libs) [ TargetBootLibgcc true ] ;
Depends $(1) : [ TargetBootLibgcc ] ;
# TODO: Do we really want to invoke SetupBoot here? The objects should
# have been compiled with BootObjects anyway, so we're doing that twice.
@@ -93,13 +164,13 @@ rule BootMergeObject
# <sources>: Sources to be compiled. Grist will be added.
# <extra CFLAGS>: Additional flags for compilation.
# <other objects>: Object files or static libraries to be merged. No grist
# will be added.
# will be added.
#
SetupBoot $(2) : $(3) ;
Objects $(2) ;
MergeObjectFromObjects $(1) : $(2:S=$(SUFOBJ)) : $(4) ;
LINKFLAGS on $(1) += $(TARGET_BOOT_LINKFLAGS) ;
LINKFLAGS on $(1) += $(HAIKU_BOOT_$(TARGET_BOOT_PLATFORM:U)_LDFLAGS) ;
}
rule BootStaticLibrary
+1 -1
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@@ -656,7 +656,7 @@ for var in $(archDependentBuildVars)_$(TARGET_PACKAGING_ARCHS) {
TARGET_BOOT_LIBGCC = $(HAIKU_BOOT_LIBGCC_$(TARGET_PACKAGING_ARCH)) ;
TARGET_BOOT_LIBSUPC++ = $(HAIKU_BOOT_LIBSUPC++_$(TARGET_PACKAGING_ARCH)) ;
TARGET_BOOT_PLATFORM ?= $(HAIKU_BOOT_PLATFORM) ;
TARGET_KERNEL_PLATFORM ?= $(HAIKU_KERNEL_PLATFORM) ;
local architecture ;
for architecture in $(TARGET_PACKAGING_ARCHS) {
+26 -6
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@@ -1492,12 +1492,12 @@ rule BuildFloppyBootImage image : haikuLoader : archive
FLOPPY_IMAGE_SIZE on $(image) = $(HAIKU_BOOT_FLOPPY_IMAGE_SIZE) ;
ARCHIVE_IMAGE_OFFSET on $(image) = $(HAIKU_BOOT_ARCHIVE_IMAGE_OFFSET) ;
BuildFloppyBootImage1 $(image) : $(haikuLoader) $(archive) ;
if $(HAIKU_BOOT_PLATFORM) = atari_m68k {
if $(HAIKU_KERNEL_PLATFORM) = atari_m68k {
Depends $(image) : <build>fixup_tos_boot_checksum ;
BuildFloppyBootImageFixupM68K $(image)
: <build>fixup_tos_boot_checksum ;
}
if $(HAIKU_BOOT_PLATFORM) = amiga_m68k {
if $(HAIKU_KERNEL_PLATFORM) = amiga_m68k {
Depends $(image) : <build>fixup_amiga_boot_checksum ;
BuildFloppyBootImageFixupM68K $(image)
: <build>fixup_amiga_boot_checksum ;
@@ -1544,20 +1544,21 @@ actions BuildFloppyBootImageFixupM68K
#pragma mark - CD Boot Image rules
rule BuildCDBootImage image : bootfloppy : extrafiles
rule BuildCDBootImage image : bootfloppy : bootefi : extrafiles
{
Depends $(image) : $(bootfloppy) ;
Depends $(image) : $(bootefi) ;
Depends $(image) : $(extrafiles) ;
BOOTIMG on $(image) = $(bootfloppy) ;
BOOTEFI on $(image) = $(bootefi) ;
BuildCDBootImage1 $(image) : $(bootfloppy) $(extrafiles) ;
BuildCDBootImage1 $(image) : $(bootfloppy) $(bootefi) $(extrafiles) ;
}
actions BuildCDBootImage1
{
$(RM) $(<)
mkisofs -b $(BOOTIMG) -r -J -V bootimg -o $(<) $(>[1]) $(>[2-]) \
|| genisoimage -b $(BOOTIMG) -r -J -V bootimg -o $(<) $(>[1]) $(>[2-])
mkisofs -b $(BOOTIMG) -eltorito-alt-boot -no-emul-boot -e $(BOOTEFI) -r -J -V bootimg -o $(<) $(>[1]) $(>[2]) $(>[3-])
}
@@ -1600,3 +1601,22 @@ actions BuildCDBootPPCImage1 bind MAPS
boot/haikuloader.xcf -r -o $(<) $(HAIKU_OUTPUT_DIR)/cd
$(RM) -r $(HAIKU_OUTPUT_DIR)/cd
}
#pragma mark - EFI System Partition rules
rule BuildEfiSystemPartition image : efiLoader
{
Depends $(image) : $(efiLoader) ;
BuildEfiSystemPartition1 $(image) : $(efiLoader) ;
}
actions BuildEfiSystemPartition1
{
$(RM) $(<)
dd if=/dev/zero of=$(<) bs=1024 count=2880
mformat -i $(<) -n 36 -h 2 -t 80
mmd -D s -i $(<) ::/EFI
mmd -D s -i $(<) ::/EFI/BOOT
mcopy -D o -i $(<) $(>) ::/EFI/BOOT/BOOTX64.EFI
}
+1 -1
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@@ -3,7 +3,7 @@
HAIKU_BOARD_DESCRIPTION = "ACube Sam460ex" ;
# must force both since they are set before this file is read.
HAIKU_BOOT_PLATFORM = u-boot ;
HAIKU_KERNEL_PLATFORM = u-boot ;
#FIXME!!!!!!!!!!!!!!!
#
+30 -2
View File
@@ -19,13 +19,41 @@ actions BuildAnybootImage1 {
$(2[1]) -b $(2[2]) $(2[3]) $(2[4]) $(1)
}
rule BuildAnybootImageEfi anybootImage : mbrPart : efiPart : isoPart : imageFile {
local anyboot = <build>anyboot ;
Depends $(anybootImage) : $(anyboot) ;
Depends $(anybootImage) : $(isoPart) ;
Depends $(anybootImage) : $(mbrPart) ;
Depends $(anybootImage) : $(efiPart) ;
Depends $(anybootImage) : $(imageFile) ;
BuildAnybootImageEfi1 $(anybootImage) : $(anyboot) $(mbrPart) $(efiPart) $(isoPart) $(imageFile) ;
}
actions BuildAnybootImageEfi1 {
$(2[1]) -b $(2[2]) -e $(2[3]) $(2[4]) $(2[5]) $(1)
}
local baseMBR = base_mbr.bin ;
local mbrSource = [ FDirName $(HAIKU_TOP) src bin writembr mbr.S ] ;
BuildMBR $(baseMBR) : $(mbrSource) ;
MakeLocate $(baseMBR) : $(HAIKU_OUTPUT_DIR) ;
MakeLocate $(HAIKU_ANYBOOT) : $(HAIKU_ANYBOOT_DIR) ;
BuildAnybootImage $(HAIKU_ANYBOOT) : $(baseMBR) : $(HAIKU_CD_BOOT_IMAGE)
: $(HAIKU_IMAGE_NAME) ;
if $(HAIKU_ANYBOOT_UEFI) = 1 {
Echo "Anyboot is MBR/UEFI hybrid" ;
local efiLoader = haiku_loader.efi ;
local efiPartition = esp.image ;
MakeLocate $(efiPartition) ;
BuildEfiSystemPartition $(efiPartition) : $(efiLoader) ;
BuildAnybootImageEfi $(HAIKU_ANYBOOT) : $(baseMBR) : $(efiPartition) : $(HAIKU_CD_BOOT_IMAGE)
: $(HAIKU_IMAGE_NAME) ;
} else {
Echo "Anyboot is MBR only" ;
BuildAnybootImage $(HAIKU_ANYBOOT) : $(baseMBR) : $(HAIKU_CD_BOOT_IMAGE)
: $(HAIKU_IMAGE_NAME) ;
}
# TODO: this one seems to cause the build to fail each other run (caching?)
#RmTemps $(HAIKU_ANYBOOT) : $(baseMBR) ;
+7 -2
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@@ -28,9 +28,14 @@ if $(TARGET_ARCH) = ppc {
BuildCDBootPPCImage $(HAIKU_CD_BOOT_IMAGE) : $(hfsmaps) : $(elfloader) : $(coffloader) : $(chrpscript) : $(extras) ;
} else {
SEARCH on $(extras) = [ FDirName $(HAIKU_TOP) data boot_cd ] ;
local efiLoader = haiku_loader.efi ;
local efiPartition = esp.image ;
MakeLocate $(efiPartition) : $(HAIKU_OUTPUT_DIR) ;
BuildEfiSystemPartition $(efiPartition) : $(efiLoader) ;
BuildCDBootImage $(HAIKU_CD_BOOT_IMAGE) : $(HAIKU_BOOT_FLOPPY) : $(extras) ;
BuildCDBootImage $(HAIKU_CD_BOOT_IMAGE) : $(HAIKU_BOOT_FLOPPY) : $(efiPartition) : $(extras) ;
SEARCH on $(extras) = [ FDirName $(HAIKU_TOP) data boot_cd ] ;
}
NotFile haiku-boot-cd ;
+1 -1
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@@ -169,7 +169,7 @@ Depends haiku-floppyboot-archive : $(HAIKU_FLOPPY_BOOT_ARCHIVE) ;
HAIKU_BOOT_FLOPPY = haiku-boot-floppy.image ;
MakeLocate $(HAIKU_BOOT_FLOPPY) : $(HAIKU_OUTPUT_DIR) ;
BuildFloppyBootImage $(HAIKU_BOOT_FLOPPY) : haiku_loader
BuildFloppyBootImage $(HAIKU_BOOT_FLOPPY) : haiku_loader.$(HAIKU_KERNEL_PLATFORM)
: $(HAIKU_FLOPPY_BOOT_ARCHIVE) ;
# remove the archive
+1 -1
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@@ -3,7 +3,7 @@ HaikuPackage $(haikuLoaderPackage) ;
# boot loader
AddFilesToPackage : haiku_loader ;
AddFilesToPackage : haiku_loader.$(HAIKU_KERNEL_PLATFORM) ;
# Force no compression, so the stage one loader can directly execute the boot