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It is possible to create shared libraries on PowerPC using -ftls-model=inital-exec or -ftls-model=local-exec. The first is half reasonable, getting you a shared library that can't be dlopen'd but otherwise is reasonable. The second is quite bad. Not only do you lose being able to dlopen, the library also has dynamic text relocations. Worse, the TPREL16_LO, TPREL16_HA and other TPREL16 dynamic relocs emitted were wrong, resulting in wrong values being applied by ld.so. Using the first TLS section symbol in dynamic relocations for local TLS symbols doesn't work. It's wrong because TLS symbols used by TLS relocs have values relative to the TLS segment, whereas the TLS section symbols are addresses. This patch instead uses a symbol index of zero which is used elsewhere by PowerPC on dynamic TLS relocs. It's not strictly ABI compliant to use a non-TLS symbol with TLS relocs but symbol index zero can be interpreted as "no symbol". Not using the first TLS section symbol means it doesn't need to be dynamic. The patch also fixes a further problem with PowerPC32 dynamic TPREL16* relocs, which shouldn't have the symbol value in the addend as we do for non-TLS symbols. bfd/ * elflink.c (_bfd_elf_omit_section_dynsym_default): Don't keep tls_sec. (_bfd_elf_init_1_index_section): Prefer not using TLS sections. (_bfd_elf_init_2_index_sections): Likewise. * elf64-ppc.c (ppc64_elf_relocate_section): When emitting dynamic relocations for local TLS symbols, use STN_UNDEF as the relocation symbol. * elf32-ppc.c (ppc_elf_relocate_section): Likewise, and don't leave TLS symbol value in the addend. ld/ * testsuite/ld-powerpc/tlsso.r: Update. * testsuite/ld-powerpc/tlsso32.g: Update. * testsuite/ld-powerpc/tlsso32.r: Update. * testsuite/ld-powerpc/tlstocso.r: Update. * testsuite/ld-cris/tls-dso-dtpoffd2.d: Update. * testsuite/ld-cris/tls-dso-dtpoffd4.d: Update. * testsuite/ld-cris/tls-dso-tpoffgotcomm1.d: Update. * testsuite/ld-cris/tls-gd-1.d: Update. * testsuite/ld-cris/tls-gd-1h.d: Update. * testsuite/ld-cris/tls-gd-2.d: Update. * testsuite/ld-cris/tls-gd-2h.d: Update. * testsuite/ld-cris/tls-ie-10.d: Update. * testsuite/ld-cris/tls-ie-11.d: Update. * testsuite/ld-cris/tls-ie-8.d: Update. * testsuite/ld-cris/tls-ie-9.d: Update. * testsuite/ld-cris/tls-js1.d: Update. * testsuite/ld-cris/tls-ld-4.d: Update. * testsuite/ld-cris/tls-ld-5.d: Update. * testsuite/ld-cris/tls-ld-6.d: Update. * testsuite/ld-cris/tls-ld-7.d: Update. * testsuite/ld-cris/tls-ldgd-14.d: Update. * testsuite/ld-cris/tls-ldgd-15.d: Update. * testsuite/ld-cris/tls-ldgdx-14.d: Update. * testsuite/ld-cris/tls-ldgdx-15.d: Update. * testsuite/ld-cris/tls-local-54.d: Update. * testsuite/ld-cris/tls-local-60.d: Update. * testsuite/ld-cris/tls-local-61.d: Update. * testsuite/ld-cris/tls-local-63.d: Update. * testsuite/ld-cris/tls-local-64.d: Update. * testsuite/ld-cris/tls-ok-30.d: Update. * testsuite/ld-cris/tls-ok-32.d: Update. * testsuite/ld-cris/tls-ok-34.d: Update. * testsuite/ld-mips-elf/tls-multi-got-1.got: Update. * testsuite/ld-mips-elf/tls-multi-got-1.r: Update. * testsuite/ld-mips-elf/tlsdyn-pie-o32.d: Update. * testsuite/ld-mips-elf/tlsdyn-pie-o32.got: Update. * testsuite/ld-mips-elf/tlslib-o32-hidden.got: Update. * testsuite/ld-mips-elf/tlslib-o32-ver.got: Update. * testsuite/ld-mips-elf/tlslib-o32.got: Update. * testsuite/ld-s390/tlspic.rd: Update. * testsuite/ld-s390/tlspic_64.rd: Update. * testsuite/ld-sparc/tlssunnopic32.rd: Update. * testsuite/ld-sparc/tlssunnopic64.rd: Update. * testsuite/ld-sparc/tlssunpic32.rd: Update. * testsuite/ld-sparc/tlssunpic64.rd: Update.
14 lines
431 B
Plaintext
14 lines
431 B
Plaintext
.*: 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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10000030 R_MIPS_TLS_DTPMOD32 tlsvar_gd
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10000034 R_MIPS_TLS_DTPREL32 tlsvar_gd
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10000040 R_MIPS_TLS_TPREL32 tlsvar_ie
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Contents of section .got:
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10000020 00000000 80000000 004004dc ffff900c .*
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10000030 00000000 00000000 00000001 00000000 .*
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10000040 00000000 00000001 ffff8008 .*
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