u-boot/arch/mips/config.mk
Daniel Schwierzeck 9630146411 MIPS: make size of relocation table fixed but configurable
Currently the size of the relocation table will be shrunk
to the actual size needed. Although this gives a maximal
space saving, it messes up the _end symbol. This breaks
features like appended DTBs because the _end symbol doesn't
point to the real end of the U-Boot binary.

Remove the size shrinking and make the size of the relocation
table fixed but configurable. This follows the Linux approach
and the user can adjust the size to his needs.

Also rename the relocation table section from .rel to .data.reloc
to follow the Linux approach and to avoid ambiguities with the
.rel.* sections added by the linker.

Reported-by: Lars Povlsen <lars.povlsen@microsemi.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2018-11-02 22:39:07 +01:00

67 lines
1.9 KiB
Makefile

# SPDX-License-Identifier: GPL-2.0+
#
# (C) Copyright 2003
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
ifdef CONFIG_SYS_BIG_ENDIAN
32bit-emul := elf32btsmip
64bit-emul := elf64btsmip
32bit-bfd := elf32-tradbigmips
64bit-bfd := elf64-tradbigmips
PLATFORM_CPPFLAGS += -EB
PLATFORM_LDFLAGS += -EB
endif
ifdef CONFIG_SYS_LITTLE_ENDIAN
32bit-emul := elf32ltsmip
64bit-emul := elf64ltsmip
32bit-bfd := elf32-tradlittlemips
64bit-bfd := elf64-tradlittlemips
PLATFORM_CPPFLAGS += -EL
PLATFORM_LDFLAGS += -EL
endif
ifdef CONFIG_32BIT
PLATFORM_CPPFLAGS += -mabi=32
PLATFORM_LDFLAGS += -m $(32bit-emul)
OBJCOPYFLAGS += -O $(32bit-bfd)
endif
ifdef CONFIG_64BIT
PLATFORM_CPPFLAGS += -mabi=64
PLATFORM_LDFLAGS += -m$(64bit-emul)
OBJCOPYFLAGS += -O $(64bit-bfd)
endif
PLATFORM_CPPFLAGS += -D__MIPS__
PLATFORM_ELFENTRY = "__start"
PLATFORM_ELFFLAGS += -B mips $(OBJCOPYFLAGS)
#
# From Linux arch/mips/Makefile
#
# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
# code since it only slows down the whole thing. At some point we might make
# use of global pointer optimizations but their use of $28 conflicts with
# the current pointer optimization.
#
# The DECStation requires an ECOFF kernel for remote booting, other MIPS
# machines may also. Since BFD is incredibly buggy with respect to
# crossformat linking we rely on the elf2ecoff tool for format conversion.
#
# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
# cflags-y += -msoft-float
# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
# MODFLAGS += -mlong-calls
#
ifndef CONFIG_SPL_BUILD
OBJCOPYFLAGS += -j .data.reloc -j .dtb.init.rodata
LDFLAGS_FINAL += --emit-relocs
endif
PLATFORM_CPPFLAGS += -G 0 -mno-abicalls -fno-pic
PLATFORM_CPPFLAGS += -msoft-float
PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
LDFLAGS_FINAL += --gc-sections
OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list