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Do not build software as PIE 

Some builds may default to creating position independent executables
with a .dynamic section containing symbols that must be relocated at
runtime. This section appears after .data section and is included in
the output .bin, causing it to be included in the build time CRC
calculation. The runtime CRC calculation stops after .data, so there
was always a mismatch.

The litex bios has no support for relocating the dynamic symbols, so
disable pie on all platforms. This will improve compatibility with
distro toolchains.

Tested with:

 marocchino / or1k-elf-gcc (GCC 12.1.0-2 Debian 1.0.3) 12.1.0

 vexriscv / riscv64-linux-gnu-gcc (Debian 12.2.0-3) 12.2.0

 microwatt / powerpc64le-linux-gnu-gcc (Debian 12.2.0-3) 12.2.0

Signed-off-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Joel Stanley 2022-11-04 16:19:02 +10:30
parent f71bda1c61
commit dd0918e9cc
1 changed files with 1 additions and 1 deletions
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2
litex/soc/software/common.mak
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@ -54,7 +54,7 @@ INCLUDES = -I$(PICOLIBC_DIRECTORY)/newlib/libc/tinystdio \
-I$(BUILDINC_DIRECTORY) \
-I$(BUILDINC_DIRECTORY)/../libc \
-I$(CPU_DIRECTORY)
COMMONFLAGS = $(DEPFLAGS) -Os $(CPUFLAGS) -g3 -fomit-frame-pointer -Wall -fno-builtin -fno-stack-protector $(INCLUDES)
COMMONFLAGS = $(DEPFLAGS) -Os $(CPUFLAGS) -g3 -no-pie -fomit-frame-pointer -Wall -fno-builtin -fno-stack-protector $(INCLUDES)
ifeq ($(LTO), 1)
COMMONFLAGS += -flto
endif