2 # (C) Copyright 2000-2002
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # SPDX-License-Identifier: GPL-2.0+
8 CROSS_COMPILE ?
= arm-linux-
10 ifndef CONFIG_STANDALONE_LOAD_ADDR
11 ifneq ($(CONFIG_OMAP_COMMON
),)
12 CONFIG_STANDALONE_LOAD_ADDR
= 0x80300000
14 CONFIG_STANDALONE_LOAD_ADDR
= 0xc100000
18 LDFLAGS_FINAL
+= --gc-sections
19 PLATFORM_RELFLAGS
+= -ffunction-sections
-fdata-sections \
20 -fno-common
-ffixed-r9
21 PLATFORM_RELFLAGS
+= $(call cc-option
, -msoft-float
) \
22 $(call cc-option
,-mshort-load-bytes
,$(call cc-option
,-malignment-traps
,))
24 # Support generic board on ARM
25 __HAVE_ARCH_GENERIC_BOARD
:= y
27 PLATFORM_CPPFLAGS
+= -DCONFIG_ARM
-D__ARM__
29 # Choose between ARM/Thumb instruction sets
30 ifeq ($(CONFIG_SYS_THUMB_BUILD
),y
)
31 PF_CPPFLAGS_ARM
:= $(call cc-option
, -mthumb
-mthumb-interwork
,\
32 $(call cc-option
,-marm
,)\
33 $(call cc-option
,-mno-thumb-interwork
,)\
36 PF_CPPFLAGS_ARM
:= $(call cc-option
,-marm
,) \
37 $(call cc-option
,-mno-thumb-interwork
,)
41 ifneq ($(CONFIG_SPL_BUILD
),y
)
42 ALL-
$(CONFIG_SYS_THUMB_BUILD
) += checkthumb
45 # Try if EABI is supported, else fall back to old API,
47 # - with ELDK 4.2 (EABI supported), use:
49 # - with ELDK 4.1 (gcc 4.x, no EABI), use:
51 # - with ELDK 3.1 (gcc 3.x), use:
53 PF_CPPFLAGS_ABI
:= $(call cc-option
,\
62 PLATFORM_CPPFLAGS
+= $(PF_CPPFLAGS_ARM
) $(PF_CPPFLAGS_ABI
)
64 # For EABI, make sure to provide raise()
65 ifneq (,$(findstring -mabi
=aapcs-linux
,$(PLATFORM_CPPFLAGS
)))
66 # This file is parsed many times, so the string may get added multiple
67 # times. Also, the prefix needs to be different based on whether
68 # CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
69 # before adding the correct one.
70 ifdef CONFIG_SPL_BUILD
71 PLATFORM_LIBS
:= $(SPLTREE
)/arch
/arm
/lib
/eabi_compat.o \
72 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
74 PLATFORM_LIBS
:= $(OBJTREE
)/arch
/arm
/lib
/eabi_compat.o \
75 $(filter-out %/arch
/arm
/lib
/eabi_compat.o
, $(PLATFORM_LIBS
))
79 # needed for relocation
80 LDFLAGS_u-boot
+= -pie
83 # FIXME: binutils versions < 2.22 have a bug in the assembler where
84 # branches to weak symbols can be incorrectly optimized in thumb mode
85 # to a short branch (b.n instruction) that won't reach when the symbol
88 # http://sourceware.org/bugzilla/show_bug.cgi?id=12532
90 ifeq ($(CONFIG_SYS_THUMB_BUILD
),y
)
91 ifeq ($(GAS_BUG_12532
),)
92 export GAS_BUG_12532
:=$(shell if
[ $(call binutils-version
) -lt
0222 ] ; \
93 then echo y
; else echo n
; fi
)
95 ifeq ($(GAS_BUG_12532
),y
)
96 PLATFORM_RELFLAGS
+= -fno-optimize-sibling-calls
100 ifneq ($(CONFIG_SPL_BUILD
),y
)
101 # Check that only R_ARM_RELATIVE relocations are generated.
102 ALL-y
+= checkarmreloc
103 # The movt / movw can hardcode 16 bit parts of the addresses in the
104 # instruction. Relocation is not supported for that case, so disable
105 # such usage by requiring word relocations.
106 PLATFORM_CPPFLAGS
+= $(call cc-option
, -mword-relocations
)
109 # limit ourselves to the sections we want in the .bin.
111 OBJCFLAGS
+= -j .text
-j .rodata
-j .data
-j .u_boot_list
-j .rela.dyn
113 OBJCFLAGS
+= -j .text
-j .rodata
-j .hash
-j .data
-j .got.plt
-j .u_boot_list
-j .rel.dyn