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The _gp_disp is a magic symbol, always implicitly defined by the linker. It does not make a sense to write it into symbol tables for output files. Moreover, now if the linker gets a version script, the _gp_disp symbol gets zero version definition index. The zero index means[1]: "The symbol is local, not available outside the object." But the _gp_disp symbol has GLOBAL binding. That confuses some tools like for example the LLD linker when they get such files as inputs. This patch fixes the problem - it prevents writing the _gp_disp symbol in regular and dynamic symbol tables. This was tested by running LD test suite on a mipsel-linux board. References: [1] "Linux Standard Base Specification", Section "10.7.2 Symbol Version Table", p. 32 2018-05-03 Simon Atanasyan <simon@atanasyan.com> bfd/ * elf32-mips.c: (elf32_mips_fixup_symbol): New function. (elf_backend_fixup_symbol): New macro. * elfxx-mips.c: (mips_elf_output_extsym): Discard _gp_disp handling. (_bfd_mips_elf_finish_dynamic_symbol): Likewise. ld/ * testsuite/ld-mips-elf/gp-disp-sym.d: New test. * testsuite/ld-mips-elf/gp-disp-sym.s: New test source. * testsuite/ld-mips-elf/mips-elf.exp: Run the new test. * testsuite/ld-mips-elf/mips16-pic-2.ad: Update for _gp_disp symbol removal. * testsuite/ld-mips-elf/mips16-pic-2.nd: Likewise. * testsuite/ld-mips-elf/pic-and-nonpic-3a.dd: Likewise. * testsuite/ld-mips-elf/tlslib-o32-hidden.got: Likewise. * testsuite/ld-mips-elf/tlslib-o32-ver.got: Likewise. * testsuite/ld-mips-elf/tlslib-o32.got: Likewise.
16 lines
461 B
Plaintext
16 lines
461 B
Plaintext
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tmpdir/tlslib-o32.so: file format elf32-tradbigmips
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DYNAMIC RELOCATION RECORDS
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OFFSET TYPE VALUE
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00000000 R_MIPS_NONE \*ABS\*
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00040428 R_MIPS_TLS_DTPMOD32 \*ABS\*
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00040420 R_MIPS_TLS_DTPMOD32 tlsvar_gd
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00040424 R_MIPS_TLS_DTPREL32 tlsvar_gd
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0004041c R_MIPS_TLS_TPREL32 tlsvar_ie
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Contents of section .got:
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40410 00000000 80000000 000003e0 00000000 ................
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40420 00000000 00000000 00000000 00000000 ................
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