Date: Sat, 21 Jan 2017 14:16:33 -0800 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: 3.9.1's lld and powerpc64 for -pie use: can't create dynamic relocation R_PPC64_REL24 against readonly segment Message-ID: <5FF1F3C4-E169-4967-9B08-F97A52B33E6F@dsl-only.net>
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For: # more main.c = = static volatile = char big_area[67001] =3D "This is a test"; int main () { big_area[67000] =3D '9'; } I get (the -fPIE is not required for the behavior): # clang -fuse-ld=3Dlld -Wl,-t -pie -fPIE main.c /usr/lib/Scrt1.o /usr/lib/crti.o /usr/lib/crtbeginS.o /tmp/main-c6f752.o /usr/lib/libgcc_s.so /lib/libc.so.7 /usr/lib/libgcc_s.so /usr/lib/crtendS.o /usr/lib/crtn.o can't create dynamic relocation R_PPC64_REL24 against readonly segment can't create dynamic relocation R_PPC64_REL24 against readonly segment can't create dynamic relocation R_PPC64_REL24 against readonly segment can't create dynamic relocation R_PPC64_REL24 against readonly segment can't create dynamic relocation R_PPC64_REL24 against readonly segment can't create dynamic relocation R_PPC64_REL24 against readonly segment clang: error: linker command failed with exit code 1 (use -v to see = invocation) (This is difficult to study because it does not leave even a partial a.out and it does not report the specifics of what segment or what symbol or the like.) Even an empty source produces that, but also including the expected: undefined symbol: main in /usr/lib/Scrt1.o It appears that the R_PPC64_REL24's are some subset of. . . /usr/lib/Scrt1.o : 00000000000000cc R_PPC64_REL24 atexit 00000000000000d8 R_PPC64_REL24 _init_tls 00000000000000f8 R_PPC64_REL24 atexit 00000000000001b4 R_PPC64_REL24 _init 0000000000000240 R_PPC64_REL24 main 0000000000000248 R_PPC64_REL24 exit 00000000000002fc R_PPC64_REL24 _fini (That would be 6 by ignoring main, matching the message count.) /usr/lib/crtbeginS.o : 0000000000000040 R_PPC64_REL24 __cxa_finalize 0000000000000000 R_PPC64_REL24 .opd 0000000000000000 R_PPC64_REL24 .opd+0x0000000000000018 /usr/lib/crtendS.o : 0000000000000000 R_PPC64_REL24 .opd main.o , if I have it produced, does not have R_PPC64_REL24 in it. =3D=3D=3D Mark Millard markmi at dsl-only.net
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