627072b06c
The tile tool chain uses the .eh_frame information for backtracing. The vmlinux build drops any .eh_frame sections at link time, but when present in kernel modules, it causes a module load failure due to the presence of unsupported pc-relative relocations. When compiling to use compiler feedback support, the compiler by default omits .eh_frame information, so we don't see this problem. But when not using feedback, we need to explicitly suppress the .eh_frame. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Cc: stable@vger.kernel.org
80 lines
2.5 KiB
Makefile
80 lines
2.5 KiB
Makefile
#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture
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# If building with TILERA_ROOT set (i.e. using the Tilera Multicore
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# Development Environment) we can set CROSS_COMPILE based on that.
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# If we're not cross-compiling, make sure we're on the right architecture.
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# Only bother to test for a few common targets, to avoid useless errors.
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ifeq ($(CROSS_COMPILE),)
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ifdef TILERA_ROOT
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CROSS_COMPILE := $(TILERA_ROOT)/bin/tile-
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else
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goals := $(if $(MAKECMDGOALS), $(MAKECMDGOALS), all)
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ifneq ($(strip $(filter vmlinux modules all,$(goals))),)
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HOST_ARCH := $(shell uname -m)
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ifneq ($(HOST_ARCH),$(ARCH))
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$(error Set TILERA_ROOT or CROSS_COMPILE when building $(ARCH) on $(HOST_ARCH))
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endif
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endif
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endif
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endif
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# The tile compiler may emit .eh_frame information for backtracing.
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# In kernel modules, this causes load failures due to unsupported relocations.
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
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ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"")
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KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS)
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endif
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LIBGCC_PATH := \
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$(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
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# Provide the path to use for "make defconfig".
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# We default to the newer TILE-Gx architecture if only "tile" is given.
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ifeq ($(ARCH),tile)
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KBUILD_DEFCONFIG := tilegx_defconfig
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else
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KBUILD_DEFCONFIG := $(ARCH)_defconfig
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endif
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# Used as a file extension when useful, e.g. head_$(BITS).o
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# Not needed for (e.g.) "$(CC) -m32" since the compiler automatically
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# uses the right default anyway.
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export BITS
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ifeq ($(CONFIG_TILEGX),y)
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BITS := 64
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else
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BITS := 32
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endif
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head-y := arch/tile/kernel/head_$(BITS).o
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libs-y += arch/tile/lib/
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libs-y += $(LIBGCC_PATH)
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# See arch/tile/Kbuild for content of core part of the kernel
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core-y += arch/tile/
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core-$(CONFIG_TILE_GXIO) += arch/tile/gxio/
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ifdef TILERA_ROOT
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INSTALL_PATH ?= $(TILERA_ROOT)/tile/boot
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endif
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install:
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install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
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install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
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install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
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define archhelp
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echo ' install - install kernel into $(INSTALL_PATH)'
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endef
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