exosphere: properly implement reboot-to-payload
This commit is contained in:
Michael Scire
154
exosphere/rebootstub/Makefile
Normal file
154
exosphere/rebootstub/Makefile
Normal file
@@ -0,0 +1,154 @@
|
||||
#---------------------------------------------------------------------------------
|
||||
.SUFFIXES:
|
||||
#---------------------------------------------------------------------------------
|
||||
|
||||
ifeq ($(strip $(DEVKITARM)),)
|
||||
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
|
||||
endif
|
||||
|
||||
TOPDIR ?= $(CURDIR)
|
||||
include $(DEVKITARM)/base_rules
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# TARGET is the name of the output
|
||||
# BUILD is the directory where object files & intermediate files will be placed
|
||||
# SOURCES is a list of directories containing source code
|
||||
# DATA is a list of directories containing data files
|
||||
# INCLUDES is a list of directories containing header files
|
||||
#---------------------------------------------------------------------------------
|
||||
TARGET := $(notdir $(CURDIR))
|
||||
BUILD := build
|
||||
SOURCES := src
|
||||
DATA := data
|
||||
INCLUDES := include
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# options for code generation
|
||||
#---------------------------------------------------------------------------------
|
||||
ARCH := -march=armv4t -mtune=arm7tdmi -mthumb -mthumb-interwork
|
||||
|
||||
CFLAGS := \
|
||||
-g \
|
||||
-O2 \
|
||||
-ffunction-sections \
|
||||
-fdata-sections \
|
||||
-fomit-frame-pointer \
|
||||
-fno-inline \
|
||||
-std=gnu11 \
|
||||
-Werror \
|
||||
-Wall \
|
||||
$(ARCH) $(DEFINES)
|
||||
|
||||
CFLAGS += $(INCLUDE) -D__BPMP__
|
||||
|
||||
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11
|
||||
|
||||
ASFLAGS := -g $(ARCH)
|
||||
LDFLAGS = -specs=$(TOPDIR)/linker.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
|
||||
|
||||
LIBS :=
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# list of directories containing libraries, this must be the top level containing
|
||||
# include and lib
|
||||
#---------------------------------------------------------------------------------
|
||||
LIBDIRS :=
|
||||
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# no real need to edit anything past this point unless you need to add additional
|
||||
# rules for different file extensions
|
||||
#---------------------------------------------------------------------------------
|
||||
ifneq ($(BUILD),$(notdir $(CURDIR)))
|
||||
#---------------------------------------------------------------------------------
|
||||
|
||||
export OUTPUT := $(CURDIR)/$(TARGET)
|
||||
export TOPDIR := $(CURDIR)
|
||||
|
||||
export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
|
||||
$(foreach dir,$(DATA),$(CURDIR)/$(dir))
|
||||
|
||||
export DEPSDIR := $(CURDIR)/$(BUILD)
|
||||
|
||||
CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
|
||||
CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
|
||||
SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
|
||||
BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# use CXX for linking C++ projects, CC for standard C
|
||||
#---------------------------------------------------------------------------------
|
||||
ifeq ($(strip $(CPPFILES)),)
|
||||
#---------------------------------------------------------------------------------
|
||||
export LD := $(CC)
|
||||
#---------------------------------------------------------------------------------
|
||||
else
|
||||
#---------------------------------------------------------------------------------
|
||||
export LD := $(CXX)
|
||||
#---------------------------------------------------------------------------------
|
||||
endif
|
||||
#---------------------------------------------------------------------------------
|
||||
|
||||
export OFILES_BIN := $(addsuffix .o,$(BINFILES))
|
||||
export OFILES_SRC := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
|
||||
export OFILES := $(OFILES_BIN) $(OFILES_SRC)
|
||||
export HFILES_BIN := $(addsuffix .h,$(subst .,_,$(BINFILES)))
|
||||
|
||||
export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
|
||||
$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
|
||||
-I$(CURDIR)/$(BUILD)
|
||||
|
||||
export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
|
||||
|
||||
.PHONY: $(BUILD) clean all
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
all: $(BUILD)
|
||||
|
||||
$(BUILD):
|
||||
@[ -d $@ ] || mkdir -p $@
|
||||
@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
clean:
|
||||
@echo clean ...
|
||||
@rm -fr $(BUILD) $(TARGET).bin $(TARGET).elf
|
||||
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
else
|
||||
.PHONY: all
|
||||
|
||||
DEPENDS := $(OFILES:.o=.d)
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# main targets
|
||||
#---------------------------------------------------------------------------------
|
||||
all : $(OUTPUT).bin
|
||||
|
||||
$(OUTPUT).bin : $(OUTPUT).elf
|
||||
$(OBJCOPY) -S -O binary $< $@
|
||||
@echo built ... $(notdir $@)
|
||||
|
||||
$(OUTPUT).elf : $(OFILES)
|
||||
|
||||
%.elf: $(OFILES)
|
||||
@echo linking $(notdir $@)
|
||||
@$(LD) $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
|
||||
@$(NM) -CSn $@ > $(notdir $*.lst)
|
||||
|
||||
$(OFILES_SRC) : $(HFILES_BIN)
|
||||
|
||||
#---------------------------------------------------------------------------------
|
||||
# you need a rule like this for each extension you use as binary data
|
||||
#---------------------------------------------------------------------------------
|
||||
%.bin.o : %.bin
|
||||
#---------------------------------------------------------------------------------
|
||||
@echo $(notdir $<)
|
||||
@$(bin2o)
|
||||
|
||||
-include $(DEPENDS)
|
||||
|
||||
#---------------------------------------------------------------------------------------
|
||||
endif
|
||||
#---------------------------------------------------------------------------------------
|
||||
18
exosphere/rebootstub/linker.ld
Normal file
18
exosphere/rebootstub/linker.ld
Normal file
@@ -0,0 +1,18 @@
|
||||
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
|
||||
OUTPUT_ARCH(arm)
|
||||
|
||||
ENTRY(_start)
|
||||
SECTIONS
|
||||
{
|
||||
. = 0x4003F000;
|
||||
|
||||
__start__ = ABSOLUTE(.);
|
||||
|
||||
.text : ALIGN(4) { *(.text.start) *(.text*); . = ALIGN(4); }
|
||||
.rodata : ALIGN(4) { *(.rodata*); . = ALIGN(4); }
|
||||
.bss : ALIGN(8) { __bss_start__ = .; *(.bss* COMMON); . = ALIGN(8); __bss_end__ = .; }
|
||||
|
||||
. = ALIGN(4);
|
||||
|
||||
__end__ = ABSOLUTE(.);
|
||||
}
|
||||
7
exosphere/rebootstub/linker.specs
Normal file
7
exosphere/rebootstub/linker.specs
Normal file
@@ -0,0 +1,7 @@
|
||||
%rename link old_link
|
||||
|
||||
*link:
|
||||
%(old_link) -T %:getenv(TOPDIR /linker.ld) --nmagic --gc-sections
|
||||
|
||||
*startfile:
|
||||
crti%O%s crtbegin%O%s
|
||||
45
exosphere/rebootstub/src/start.s
Normal file
45
exosphere/rebootstub/src/start.s
Normal file
@@ -0,0 +1,45 @@
|
||||
/*
|
||||
* Copyright (c) 2018 Atmosphère-NX
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
.section .text.start
|
||||
.align 4
|
||||
.global _start
|
||||
_start:
|
||||
b crt0
|
||||
|
||||
.global crt0
|
||||
.type crt0, %function
|
||||
crt0:
|
||||
@ clear all registers
|
||||
ldr r0, =0x52425430 @ RBT0
|
||||
mov r1, #0x0
|
||||
mov r2, #0x0
|
||||
mov r3, #0x0
|
||||
mov r4, #0x0
|
||||
mov r5, #0x0
|
||||
mov r6, #0x0
|
||||
mov r7, #0x0
|
||||
mov r8, #0x0
|
||||
mov r9, #0x0
|
||||
mov r10, #0x0
|
||||
mov r11, #0x0
|
||||
mov r12, #0x0
|
||||
mov lr, #0x0
|
||||
ldr sp, =0x40010000
|
||||
ldr pc, =0x40010000
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user