Re: -pie option in ARM64 environment

[Marc Glisse <marc dot glisse at inria dot fr>]

On Fri, 29 Sep 2017, jacob navia wrote:

> I am getting this error:
>
> GNU ld (GNU Binutils for Debian) 2.28
> /usr/bin/ld: error.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against external 
> symbol `stderr@@GLIBC_2.17' can not be used when making a shared object; 
> recompile with -fPIC
>
> The problem is, I do NOT want to make a shared object! Just a plain 
> executable.
>
> The verbose linker options are as follows:
>
> collect2 version 6.3.0 20170516
> /usr/bin/ld -plugin /usr/lib/gcc/aarch64-linux-gnu/6/liblto_plugin.so 
> -plugin-opt=/usr/lib/gcc/aarch64-linux-gnu/6/lto-wrapper 
> -plugin-opt=-fresolution=/tmp/cc9I00ft.res -plugin-opt=-pass-through=-lgcc 
> -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc 
> -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/ 
> --build-id --eh-frame-hdr --hash-style=gnu -dynamic-linker 
> /lib/ld-linux-aarch64.so.1 -X -EL -maarch64linux --fix-cortex-a53-843419 -pie 
> -o lcc /usr/lib/gcc/aarch64-linux-gnu/6/../../../aarch64-linux-gnu/Scrt1.o 
> /usr/lib/gcc/aarch64-linux-gnu/6/../../../aarch64-linux-gnu/crti.o 
> /usr/lib/gcc/aarch64-linux-gnu/6/crtbeginS.o 
> -L/usr/lib/gcc/aarch64-linux-gnu/6 
> -L/usr/lib/gcc/aarch64-linux-gnu/6/../../../aarch64-linux-gnu 
> -L/usr/lib/gcc/aarch64-linux-gnu/6/../../../../lib -L/lib/aarch64-linux-gnu 
> -L/lib/../lib -L/usr/lib/aarch64-linux-gnu -L/usr/lib/../lib 
> -L/usr/lib/gcc/aarch64-linux-gnu/6/../../.. alloc.o bind.o dag.o decl.o 
> enode.o error.o backend-arm.o intrin.o event.o expr.o gen.o init.o input.o 
> lex.o arm64.o list.o operators.o main.o ncpp.o output.o simp.o msg.o 
> callwin64.o bitmasktable.o table.o stmt.o string.o stab.o sym.o Tree.o 
> types.o analysis.o asm.o inline.o -lm ../lcclib.a ../bfd/libbfd.a 
> ../asm/libopcodes.a -Map=lcc.map -v -lgcc --as-needed -lgcc_s --no-as-needed 
> -lc -lgcc --as-needed -lgcc_s --no-as-needed 
> /usr/lib/gcc/aarch64-linux-gnu/6/crtendS.o 
> /usr/lib/gcc/aarch64-linux-gnu/6/../../../aarch64-linux-gnu/crtn.o
>
> I think the problems lies in this mysterious "pie" option:
>
> ... --fix-cortex-a53-843419 -pie -o lcc...
>
>
> "PIE" could stand for Position Independent Executable.
>
> How could I get rid of that?

-no-pie probably.

> Which text file where is responsible for adding 
> this "pie" option to the ld command line?
>
> I am not so well versed in gcc's internals to figure out without your help.

Does it show when you run "gcc -dumpspecs"? If so you could provide a 
different specs file. Otherwise, you could check the patches that your 
distribution applies to gcc, one of them likely has "pie" in its name.

Easiest is likely to build gcc from the official sources, which shouldn't 
use pie by default.

--
Marc Glisse