mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-09 22:56:35 +00:00
exosphere: properly implement reboot-to-payload
This commit is contained in:
Michael Scire
parent
c9c8f64f09
commit
c6f06e2c40
8 changed files with 262 additions and 11 deletions
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@ -76,14 +76,15 @@ export TOPDIR := $(CURDIR)
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export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
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$(foreach dir,$(DATA),$(CURDIR)/$(dir)) \
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$(TOPDIR)/lp0fw \
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$(TOPDIR)/sc7fw
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$(TOPDIR)/sc7fw \
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$(TOPDIR)/rebootstub
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export DEPSDIR := $(CURDIR)/$(BUILD)
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CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
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CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
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SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
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BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) sc7fw.bin lp0fw.bin
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BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) sc7fw.bin lp0fw.bin rebootstub.bin
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#---------------------------------------------------------------------------------
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# use CXX for linking C++ projects, CC for standard C
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@ -110,7 +111,7 @@ export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
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export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
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.PHONY: $(BUILD) build_sc7fw build_lp0fw clean all
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.PHONY: $(BUILD) build_sc7fw build_lp0fw build_rebootstub clean all
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#---------------------------------------------------------------------------------
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all: $(BUILD)
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@ -121,7 +122,10 @@ check_sc7fw:
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check_lp0fw:
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@$(MAKE) -C lp0fw all
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$(BUILD): check_sc7fw check_lp0fw
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check_rebootstub:
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@$(MAKE) -C lp0fw all
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$(BUILD): check_sc7fw check_lp0fw check_rebootstub
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@[ -d $@ ] || mkdir -p $@
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@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
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@ -130,6 +134,7 @@ clean:
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@echo clean ...
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@$(MAKE) -C $(TOPDIR)/sc7fw clean
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@$(MAKE) -C $(TOPDIR)/lp0fw clean
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@$(MAKE) -C $(TOPDIR)/rebootstub clean
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@rm -fr $(BUILD) $(TARGET).bin $(TARGET).elf
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154
exosphere/rebootstub/Makefile
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154
exosphere/rebootstub/Makefile
Normal file
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@ -0,0 +1,154 @@
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#---------------------------------------------------------------------------------
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.SUFFIXES:
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#---------------------------------------------------------------------------------
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ifeq ($(strip $(DEVKITARM)),)
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$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
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endif
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TOPDIR ?= $(CURDIR)
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include $(DEVKITARM)/base_rules
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#---------------------------------------------------------------------------------
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# TARGET is the name of the output
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# BUILD is the directory where object files & intermediate files will be placed
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# SOURCES is a list of directories containing source code
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# DATA is a list of directories containing data files
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# INCLUDES is a list of directories containing header files
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#---------------------------------------------------------------------------------
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TARGET := $(notdir $(CURDIR))
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BUILD := build
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SOURCES := src
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DATA := data
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INCLUDES := include
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#---------------------------------------------------------------------------------
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# options for code generation
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#---------------------------------------------------------------------------------
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ARCH := -march=armv4t -mtune=arm7tdmi -mthumb -mthumb-interwork
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CFLAGS := \
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-g \
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-O2 \
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-ffunction-sections \
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-fdata-sections \
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-fomit-frame-pointer \
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-fno-inline \
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-std=gnu11 \
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-Werror \
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-Wall \
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$(ARCH) $(DEFINES)
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CFLAGS += $(INCLUDE) -D__BPMP__
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CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11
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ASFLAGS := -g $(ARCH)
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LDFLAGS = -specs=$(TOPDIR)/linker.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
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LIBS :=
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#---------------------------------------------------------------------------------
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# list of directories containing libraries, this must be the top level containing
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# include and lib
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#---------------------------------------------------------------------------------
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LIBDIRS :=
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#---------------------------------------------------------------------------------
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# no real need to edit anything past this point unless you need to add additional
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# rules for different file extensions
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#---------------------------------------------------------------------------------
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ifneq ($(BUILD),$(notdir $(CURDIR)))
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#---------------------------------------------------------------------------------
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export OUTPUT := $(CURDIR)/$(TARGET)
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export TOPDIR := $(CURDIR)
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export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
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$(foreach dir,$(DATA),$(CURDIR)/$(dir))
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export DEPSDIR := $(CURDIR)/$(BUILD)
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CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
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CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
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SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
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BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
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#---------------------------------------------------------------------------------
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# use CXX for linking C++ projects, CC for standard C
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#---------------------------------------------------------------------------------
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ifeq ($(strip $(CPPFILES)),)
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#---------------------------------------------------------------------------------
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export LD := $(CC)
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#---------------------------------------------------------------------------------
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else
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#---------------------------------------------------------------------------------
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export LD := $(CXX)
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#---------------------------------------------------------------------------------
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endif
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#---------------------------------------------------------------------------------
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export OFILES_BIN := $(addsuffix .o,$(BINFILES))
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export OFILES_SRC := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
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export OFILES := $(OFILES_BIN) $(OFILES_SRC)
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export HFILES_BIN := $(addsuffix .h,$(subst .,_,$(BINFILES)))
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export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
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$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
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-I$(CURDIR)/$(BUILD)
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export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
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.PHONY: $(BUILD) clean all
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#---------------------------------------------------------------------------------
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all: $(BUILD)
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$(BUILD):
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@[ -d $@ ] || mkdir -p $@
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@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
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#---------------------------------------------------------------------------------
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clean:
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@echo clean ...
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@rm -fr $(BUILD) $(TARGET).bin $(TARGET).elf
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#---------------------------------------------------------------------------------
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else
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.PHONY: all
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DEPENDS := $(OFILES:.o=.d)
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#---------------------------------------------------------------------------------
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# main targets
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#---------------------------------------------------------------------------------
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all : $(OUTPUT).bin
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$(OUTPUT).bin : $(OUTPUT).elf
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$(OBJCOPY) -S -O binary $< $@
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@echo built ... $(notdir $@)
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$(OUTPUT).elf : $(OFILES)
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%.elf: $(OFILES)
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@echo linking $(notdir $@)
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@$(LD) $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
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@$(NM) -CSn $@ > $(notdir $*.lst)
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$(OFILES_SRC) : $(HFILES_BIN)
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#---------------------------------------------------------------------------------
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# you need a rule like this for each extension you use as binary data
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#---------------------------------------------------------------------------------
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%.bin.o : %.bin
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#---------------------------------------------------------------------------------
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@echo $(notdir $<)
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@$(bin2o)
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-include $(DEPENDS)
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#---------------------------------------------------------------------------------------
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endif
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#---------------------------------------------------------------------------------------
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18
exosphere/rebootstub/linker.ld
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18
exosphere/rebootstub/linker.ld
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@ -0,0 +1,18 @@
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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ENTRY(_start)
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SECTIONS
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{
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. = 0x4003F000;
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__start__ = ABSOLUTE(.);
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.text : ALIGN(4) { *(.text.start) *(.text*); . = ALIGN(4); }
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.rodata : ALIGN(4) { *(.rodata*); . = ALIGN(4); }
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.bss : ALIGN(8) { __bss_start__ = .; *(.bss* COMMON); . = ALIGN(8); __bss_end__ = .; }
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. = ALIGN(4);
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__end__ = ABSOLUTE(.);
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}
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7
exosphere/rebootstub/linker.specs
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7
exosphere/rebootstub/linker.specs
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@ -0,0 +1,7 @@
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%rename link old_link
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*link:
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%(old_link) -T %:getenv(TOPDIR /linker.ld) --nmagic --gc-sections
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*startfile:
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crti%O%s crtbegin%O%s
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45
exosphere/rebootstub/src/start.s
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45
exosphere/rebootstub/src/start.s
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@ -0,0 +1,45 @@
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/*
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* Copyright (c) 2018 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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.section .text.start
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.align 4
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.global _start
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_start:
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b crt0
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.global crt0
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.type crt0, %function
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crt0:
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@ clear all registers
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ldr r0, =0x52425430 @ RBT0
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mov r1, #0x0
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mov r2, #0x0
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mov r3, #0x0
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mov r4, #0x0
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mov r5, #0x0
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mov r6, #0x0
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mov r7, #0x0
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mov r8, #0x0
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mov r9, #0x0
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mov r10, #0x0
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mov r11, #0x0
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mov r12, #0x0
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mov lr, #0x0
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ldr sp, =0x40010000
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ldr pc, =0x40010000
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@ -26,6 +26,14 @@
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#include "utils.h"
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#include "masterkey.h"
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#include "exocfg.h"
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#include "smc_ams.h"
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#include "arm.h"
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#define u8 uint8_t
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#define u32 uint32_t
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#include "rebootstub_bin.h"
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#undef u8
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#undef u32
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static bool g_battery_profile = false;
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static bool g_debugmode_override_user = false, g_debugmode_override_priv = false;
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@ -48,11 +56,22 @@ uint32_t configitem_set(bool privileged, ConfigItem item, uint64_t value) {
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case REBOOT_KIND_TO_WB_PAYLOAD:
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/* Set reboot kind = warmboot. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x450ull) = 0x1;
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/* Patch bootrom to jump to payload. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x630ull) = 0x0010171B; /* Return to bootrom IRAM initialization func. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x634ull) = 0x4000FFA4; /* Overwrite bootrom return address on stack. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x638ull) = 0x40010000; /* Return to start of payload. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x63Cull) = 0x4000FFB4; /* Overwrite bootrom return address on stack. */
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/* Patch SDRAM init to perform an SVC immediately after second write */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x634ull) = 0x2E38DFFF;
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x638ull) = 0x6001DC28;
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/* Set SVC handler to jump to reboot stub in IRAM. */
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x520ull) = 0x4003F000;
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC) + 0x53Cull) = 0x6000F208;
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/* Copy reboot stub payload. */
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ams_map_irampage(0x4003F000);
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for (unsigned int i = 0; i < rebootstub_bin_size; i += 4) {
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MAKE_REG32(MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_AMS_IRAM_PAGE) + i) = read32le(rebootstub_bin, i);
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}
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ams_unmap_irampage();
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/* Ensure stub is flushed. */
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flush_dcache_all();
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break;
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default:
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return 2;
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@ -72,7 +72,7 @@ static void ams_unmap_userpage(void) {
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lock_release(&g_ams_userpage_mapped);
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}
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static void ams_map_irampage(uintptr_t iram_address) {
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void ams_map_irampage(uintptr_t iram_address) {
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lock_acquire(&g_ams_iram_page_mapped);
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static const uint64_t irampage_attributes = MMU_PTE_BLOCK_XN | MMU_PTE_BLOCK_INNER_SHAREBLE | ATTRIB_MEMTYPE_DEVICE;
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uintptr_t *mmu_l3_tbl = (uintptr_t *)TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGMENT_ID_L3_TRANSLATION_TABLE);
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@ -80,7 +80,7 @@ static void ams_map_irampage(uintptr_t iram_address) {
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tlb_invalidate_page_inner_shareable((void *)AMS_IRAM_PAGE_SECURE_MONITOR_ADDR);
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}
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static void ams_unmap_irampage(void) {
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void ams_unmap_irampage(void) {
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uintptr_t *mmu_l3_tbl = (uintptr_t *)TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGMENT_ID_L3_TRANSLATION_TABLE);
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mmu_unmap_page(mmu_l3_tbl, AMS_IRAM_PAGE_SECURE_MONITOR_ADDR);
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tlb_invalidate_page_inner_shareable((void *)AMS_IRAM_PAGE_SECURE_MONITOR_ADDR);
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@ -21,4 +21,7 @@
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uint32_t ams_iram_copy(smc_args_t *args);
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void ams_map_irampage(uintptr_t iram_address);
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void ams_unmap_irampage(void);
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#endif
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