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Reclaim more than 19K of ARM flash memory.

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- added compiler options -fdata-sections and -ffunction-sections (thanks to iceman for the hint)
- removed float operations from common/lfdemod.c to avoid adding float libraries to the ARM os image
- moved the fpga images to the data section to avoid reserving unused space for a separate section
This commit is contained in:
pwpiwi 2015-03-31 08:01:23 +02:00
commit e335ca2846
5 changed files with 28 additions and 39 deletions
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11
armsrc/Makefile
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@ -10,7 +10,7 @@ APP_INCLUDES = apps.h
#remove one of the following defines and comment out the relevant line
#in the next section to remove that particular feature from compilation
APP_CFLAGS = -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG -DWITH_CRC -DON_DEVICE -fno-strict-aliasing
APP_CFLAGS = -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG -DWITH_CRC -DON_DEVICE -fno-strict-aliasing -ffunction-sections -fdata-sections
#-DWITH_LCD
#SRC_LCD = fonts.c LCD.c
@ -51,7 +51,8 @@ APP_CFLAGS += -I.
# Do not move this inclusion before the definition of {THUMB,ASM,ARM}SRC
include ../common/Makefile.common
OBJS = $(OBJDIR)/osimage.s19 $(OBJDIR)/fpgaimage.s19
OBJS = $(OBJDIR)/osimage.s19
#$(OBJDIR)/fpgaimage.s19
all: $(OBJS)
@ -64,11 +65,11 @@ $(OBJDIR)/fpga_hf.o: fpga_hf.bit
$(OBJDIR)/fullimage.elf: $(VERSIONOBJ) $(OBJDIR)/fpga_lf.o $(OBJDIR)/fpga_hf.o $(THUMBOBJ) $(ARMOBJ)
$(CC) $(LDFLAGS) -Wl,-T,ldscript,-Map,$(patsubst %.elf,%.map,$@) -o $@ $^ $(LIBS)
$(OBJDIR)/fpgaimage.elf: $(OBJDIR)/fullimage.elf
$(OBJCOPY) -F elf32-littlearm --only-section .fpgaimage $^ $@
#$(OBJDIR)/fpgaimage.elf: $(OBJDIR)/fullimage.elf
# $(OBJCOPY) -F elf32-littlearm --only-section .fpgaimage $^ $@
$(OBJDIR)/osimage.elf: $(OBJDIR)/fullimage.elf
$(OBJCOPY) -F elf32-littlearm --remove-section .fpgaimage $^ $@
$(OBJCOPY) -F elf32-littlearm $^ $@
tarbin: $(OBJS)
$(TAR) $(TARFLAGS) ../proxmark3-$(platform)-bin.tar $(OBJS:%=armsrc/%) $(OBJS:%.s19=armsrc/%.elf)

10
armsrc/ldscript
View file

@ -11,8 +11,7 @@ INCLUDE ../common/ldscript.common
PHDRS
{
fpgaimage PT_LOAD FLAGS(4);
text PT_LOAD;
text PT_LOAD FLAGS(5);
data PT_LOAD;
bss PT_LOAD;
}
@ -20,11 +19,6 @@ PHDRS
ENTRY(Vector)
SECTIONS
{
.fpgaimage : {
*(fpga_lf_bit.data)
*(fpga_hf_bit.data)
} >fpgaimage :fpgaimage
.start : {
*(.startos)
} >osimage :text
@ -40,6 +34,8 @@ SECTIONS
.rodata : {
*(.rodata)
*(.rodata.*)
*(fpga_lf_bit.data)
*(fpga_hf_bit.data)
KEEP(*(.version_information))
} >osimage :text