freemyipod r469 - Code Review

Repository:	freemyipod
Revision:	< r468‎ \| r469 \| r470 >
Date:	03:02, 22 January 2011
Author:	theseven
Status:	new
Tags:
Comment:	emCORE: Allow libraries to not have an initialization functionAdd emCORE Booting Library (for now it just contains verify_rockbox_checksum)
Modified paths:	/libs (added) (history) /libs/boot (added) (history) /libs/boot/Makefile (added) (history) /libs/boot/SOURCES (added) (history) /libs/boot/export (added) (history) /libs/boot/export/libboot.h (added) (history) /libs/boot/ls.x (added) (history) /libs/boot/main.c (added) (history) /libs/boot/version.h (added) (history)

Diff [purge]

Index: libs/boot/export/libboot.h
—	—	@@ -0,0 +1,52 @@
	2	+//
	3	+//
	4	+// Copyright 2010 TheSeven
	5	+//
	6	+//
	7	+// This file is part of emCORE.
	8	+//
	9	+// emCORE is free software: you can redistribute it and/or
	10	+// modify it under the terms of the GNU General Public License as
	11	+// published by the Free Software Foundation, either version 2 of the
	12	+// License, or (at your option) any later version.
	13	+//
	14	+// emCORE is distributed in the hope that it will be useful,
	15	+// but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	17	+// See the GNU General Public License for more details.
	18	+//
	19	+// You should have received a copy of the GNU General Public License along
	20	+// with emCORE. If not, see <http://www.gnu.org/licenses/>.
	21	+//
	22	+//
	23	+
	24	+
	25	+#ifndef __LIBBOOT_H__
	26	+#define __LIBBOOT_H__
	27	+
	28	+#include "emcorelib.h"
	29	+
	30	+
	31	+int verify_rockbox_checksum(void* image, size_t size);
	32	+
	33	+
	34	+/* increase this every time the api struct changes */
	35	+#define LIBBOOT_API_VERSION 1
	36	+
	37	+/* update this to latest version if a change to the api struct breaks
	38	+ backwards compatibility (and please take the opportunity to sort in any
	39	+ new function which are "waiting" at the end of the function table) */
	40	+#define LIBBOOT_MIN_API_VERSION 1
	41	+
	42	+/* NOTE: To support backwards compatibility, only add new functions at
	43	+ the end of the structure. Every time you add a new function,
	44	+ remember to increase LIBBOOT_API_VERSION. If you make changes to the
	45	+ existing APIs, also update LIBBOOT_MIN_API_VERSION to current version */
	46	+
	47	+struct libboot_api
	48	+{
	49	+ typeof(verify_rockbox_checksum)* verify_rockbox_checksum;
	50	+};
	51	+
	52	+
	53	+#endif
Property changes on: libs/boot/export/libboot.h
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	54	+*
\ No newline at end of property
Index: libs/boot/SOURCES
—	—	@@ -0,0 +1 @@
	2	+main.c
Property changes on: libs/boot/SOURCES
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	3	+*
\ No newline at end of property
Index: libs/boot/ls.x
—	—	@@ -0,0 +1,42 @@
	2	+ENTRY(__emcore_lib_header)
	3	+OUTPUT_FORMAT(elf32-littlearm)
	4	+OUTPUT_ARCH(arm)
	5	+
	6	+MEMORY
	7	+{
	8	+ VIRTUAL : ORIGIN = 0x00000000, LENGTH = 0x10000000
	9	+}
	10	+
	11	+SECTIONS
	12	+{
	13	+ .text :
	14	+ {
	15	+ __emcore_lib_base = .;
	16	+ KEEP(.emcoreentrypoint*)
	17	+ (.emcoreentrypoint)
	18	+ (.text)
	19	+ *(.glue_7)
	20	+ *(.glue_7t)
	21	+ . = ALIGN(0x4);
	22	+ } > VIRTUAL
	23	+
	24	+ .data :
	25	+ {
	26	+ (.rodata)
	27	+ . = ALIGN(0x4);
	28	+ (.data)
	29	+ . = ALIGN(0x4);
	30	+ } > VIRTUAL
	31	+
	32	+ .bss (NOLOAD) :
	33	+ {
	34	+ (.bss)
	35	+ *(COMMON)
	36	+ } > VIRTUAL
	37	+
	38	+ /DISCARD/ :
	39	+ {
	40	+ *(.eh_frame)
	41	+ }
	42	+
	43	+}
Property changes on: libs/boot/ls.x
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	44	+*
\ No newline at end of property
Index: libs/boot/main.c
—	—	@@ -0,0 +1,64 @@
	2	+//
	3	+//
	4	+// Copyright 2010 TheSeven
	5	+//
	6	+//
	7	+// This file is part of emCORE.
	8	+//
	9	+// emCORE is free software: you can redistribute it and/or
	10	+// modify it under the terms of the GNU General Public License as
	11	+// published by the Free Software Foundation, either version 2 of the
	12	+// License, or (at your option) any later version.
	13	+//
	14	+// emCORE is distributed in the hope that it will be useful,
	15	+// but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	17	+// See the GNU General Public License for more details.
	18	+//
	19	+// You should have received a copy of the GNU General Public License along
	20	+// with emCORE. If not, see <http://www.gnu.org/licenses/>.
	21	+//
	22	+//
	23	+
	24	+
	25	+#include "emcorelib.h"
	26	+#include "export/libboot.h"
	27	+
	28	+
	29	+struct libboot_api apitable =
	30	+{
	31	+ .verify_rockbox_checksum = verify_rockbox_checksum
	32	+};
	33	+
	34	+
	35	+EMCORE_LIB_HEADER(0x4c424365, LIBBOOT_API_VERSION, LIBBOOT_MIN_API_VERSION, NULL, NULL, apitable)
	36	+
	37	+
	38	+int verify_rockbox_checksum(void* image, size_t size)
	39	+{
	40	+ int i;
	41	+ uint8_t* data = (uint8_t*)image;
	42	+ uint32_t checksum = data[3] \| (data[2] << 8) \| (data[1] << 16) \| (data[0] << 24);
	43	+ uint32_t platform;
	44	+ switch (get_platform_id())
	45	+ {
	46	+ case 0x47324e49: // IN2G
	47	+ checksum -= 62;
	48	+ platform = 0x67326e6e; // nn2g
	49	+ break;
	50	+ case 0x4c435049: // IPCL
	51	+ checksum -= 71;
	52	+ platform = 0x67367069; // ip6g
	53	+ break;
	54	+ default:
	55	+ return -3;
	56	+ }
	57	+ if (((uint32_t)&data[4]) != platform) return -2;
	58	+ for (i = 0; i < size - 8; i++)
	59	+ {
	60	+ data[i] = data[i + 8];
	61	+ checksum -= data[i + 8];
	62	+ }
	63	+ if (checksum) return -1;
	64	+ return 0;
	65	+}
Property changes on: libs/boot/main.c
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	66	+*
\ No newline at end of property
Index: libs/boot/version.h
—	—	@@ -0,0 +1,36 @@
	2	+//
	3	+//
	4	+// Copyright 2010 TheSeven
	5	+//
	6	+//
	7	+// This file is part of emBIOS.
	8	+//
	9	+// emBIOS is free software: you can redistribute it and/or
	10	+// modify it under the terms of the GNU General Public License as
	11	+// published by the Free Software Foundation, either version 2 of the
	12	+// License, or (at your option) any later version.
	13	+//
	14	+// emBIOS is distributed in the hope that it will be useful,
	15	+// but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	17	+// See the GNU General Public License for more details.
	18	+//
	19	+// You should have received a copy of the GNU General Public License along
	20	+// with emBIOS. If not, see <http://www.gnu.org/licenses/>.
	21	+//
	22	+//
	23	+
	24	+
	25	+#ifndef __VERSION_H__
	26	+#define __VERSION_H__
	27	+
	28	+
	29	+#define VERSION "0.0.1pre"
	30	+#define VERSION_MAJOR 0
	31	+#define VERSION_MINOR 0
	32	+#define VERSION_PATCH 1
	33	+#define VERSION_SVN "$REVISION$"
	34	+#define VERSION_SVN_INT $REVISIONINT$
	35	+
	36	+
	37	+#endif
\ No newline at end of file
Property changes on: libs/boot/version.h
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	38	+*
\ No newline at end of property
Index: libs/boot/Makefile
—	—	@@ -0,0 +1,109 @@
	2	+NAME := boot
	3	+COMPRESS := true
	4	+
	5	+EMCOREDIR ?= ../../emcore/trunk/
	6	+
	7	+ifeq ($(shell uname),WindowsNT)
	8	+CCACHE :=
	9	+else
	10	+CCACHE := $(shell which ccache)
	11	+endif
	12	+
	13	+CROSS ?= arm-elf-eabi-
	14	+CC := $(CCACHE) $(CROSS)gcc
	15	+AS := $(CROSS)as
	16	+LD := $(CROSS)ld
	17	+OBJCOPY := $(CROSS)objcopy
	18	+ELF2ECA := $(CROSS)elf2emcoreapp
	19	+
	20	+CFLAGS += -Os -fno-pie -fno-stack-protector -fomit-frame-pointer -I. -I$(EMCOREDIR)/export -ffunction-sections -fdata-sections -mcpu=arm940t
	21	+LDFLAGS += "$(shell $(CC) -print-libgcc-file-name)" -d -r --gc-sections
	22	+
	23	+preprocess = $(shell $(CC) $(PPCFLAGS) $(2) -E -P -x c $(1) \| grep -v "^\#")
	24	+preprocesspaths = $(shell $(CC) $(PPCFLAGS) $(2) -E -P -x c $(1) \| grep -v "^\#" \| sed -e "s:^..*:$(dir $(1))&:")
	25	+
	26	+REVISION := $(shell svnversion .)
	27	+REVISIONINT := $(shell echo $(REVISION) \| sed -e "s/[^0-9].*$$//")
	28	+
	29	+HELPERS := build/__emcore_armhelpers.o
	30	+
	31	+SRC := $(call preprocesspaths,SOURCES,-I. -I..)
	32	+OBJ := $(SRC:%.c=build/%.o)
	33	+OBJ := $(OBJ:%.S=build/%.o) $(HELPERS)
	34	+
	35	+all: $(NAME)
	36	+
	37	+-include $(OBJ:%=%.dep)
	38	+
	39	+$(NAME): build/$(NAME).emcorelib
	40	+
	41	+build/$(NAME).emcorelib: build/$(NAME).elf
	42	+ @echo [EMCLIB] $<
	43	+ifeq ($(COMPRESS),true)
	44	+ @$(ELF2ECA) -l -z -s 0 -o $@ $^
	45	+else
	46	+ @$(ELF2ECA) -l -s 0 -o $@ $^
	47	+endif
	48	+
	49	+build/$(NAME).elf: ls.x $(OBJ)
	50	+ @echo [LD] $@
	51	+ @$(LD) $(LDFLAGS) -o $@ -T ls.x $(OBJ)
	52	+
	53	+build/%.o: %.c build/version.h
	54	+ @echo [CC] $<
	55	+ifeq ($(shell uname),WindowsNT)
	56	+ @-if not exist $(subst /,\,$(dir $@)) md $(subst /,\,$(dir $@))
	57	+else
	58	+ @-mkdir -p $(dir $@)
	59	+endif
	60	+ @$(CC) -c $(CFLAGS) -o $@ $<
	61	+ @$(CC) -MM $(CFLAGS) $< > $@.dep.tmp
	62	+ @sed -e "s\|.*:\|$@:\|" < $@.dep.tmp > $@.dep
	63	+ifeq ($(shell uname),WindowsNT)
	64	+ @sed -e "s/.://" -e "s/\\$$//" < $@.dep.tmp \| fmt -1 \| sed -e "s/^ //" -e "s/$$/:/" >> $@.dep
	65	+else
	66	+ @sed -e 's/.://' -e 's/\\$$//' < $@.dep.tmp \| fmt -1 \| sed -e 's/^ //' -e 's/$$/:/' >> $@.dep
	67	+endif
	68	+ @rm -f $@.dep.tmp
	69	+
	70	+build/%.o: %.S build/version.h
	71	+ @echo [CC] $<
	72	+ifeq ($(shell uname),WindowsNT)
	73	+ @-if not exist $(subst /,\,$(dir $@)) md $(subst /,\,$(dir $@))
	74	+else
	75	+ @-mkdir -p $(dir $@)
	76	+endif
	77	+ @$(CC) -c $(CFLAGS) -o $@ $<
	78	+ @$(CC) -MM $(CFLAGS) $< > $@.dep.tmp
	79	+ @sed -e "s\|.*:\|$@:\|" < $@.dep.tmp > $@.dep
	80	+ifeq ($(shell uname),WindowsNT)
	81	+ @sed -e "s/.://" -e "s/\\$$//" < $@.dep.tmp \| fmt -1 \| sed -e "s/^ //" -e "s/$$/:/" >> $@.dep
	82	+else
	83	+ @sed -e 's/.://' -e 's/\\$$//' < $@.dep.tmp \| fmt -1 \| sed -e 's/^ //' -e 's/$$/:/' >> $@.dep
	84	+endif
	85	+ @rm -f $@.dep.tmp
	86	+
	87	+build/__emcore_%.o: $(EMCOREDIR)/export/%.S
	88	+ @echo [CC] $<
	89	+ifeq ($(shell uname),WindowsNT)
	90	+ @-if not exist $(subst /,\,$(dir $@)) md $(subst /,\,$(dir $@))
	91	+else
	92	+ @-mkdir -p $(dir $@)
	93	+endif
	94	+ @$(CC) -c $(CFLAGS) -o $@ $<
	95	+
	96	+build/version.h: version.h .svn/entries build
	97	+ @echo [PP] $<
	98	+ifeq ($(shell uname),WindowsNT)
	99	+ @sed -e "s/\$$REVISION\$$/$(REVISION)/" -e "s/\$$REVISIONINT\$$/$(REVISIONINT)/" < $< > $@
	100	+else
	101	+ @sed -e 's/\$$REVISION\$$/$(REVISION)/' -e 's/\$$REVISIONINT\$$/$(REVISIONINT)/' < $< > $@
	102	+endif
	103	+
	104	+build:
	105	+ @mkdir $@
	106	+
	107	+clean:
	108	+ rm -rf build
	109	+
	110	+.PHONY: all clean $(NAME)
Property changes on: libs/boot/Makefile
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
	111	+*
\ No newline at end of property
Index: libs/boot
Property changes on: libs/boot
___________________________________________________________________
Added: svn:ignore
## -0,0 +1 ##
	112	+build

freemyipod r469 - Code Review

Diff [purge]

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