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https://sourceware.org/git/binutils-gdb.git
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f26a32876b
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.
39 lines
1.6 KiB
R
39 lines
1.6 KiB
R
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Dynamic section at offset .* contains 18 entries:
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Tag Type Name/Value
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0x00000004 \(HASH\) 0x1c4
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0x00000005 \(STRTAB\).*
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0x00000006 \(SYMTAB\).*
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0x0000000a \(STRSZ\) 220065 \(bytes\)
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0x0000000b \(SYMENT\) 16 \(bytes\)
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0x00000003 \(PLTGOT\) 0x122320
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0x00000011 \(REL\) 0xa7924
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0x00000012 \(RELSZ\) 160072 \(bytes\)
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0x00000013 \(RELENT\) 8 \(bytes\)
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0x70000001 \(MIPS_RLD_VERSION\) 1
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0x70000005 \(MIPS_FLAGS\) NOTPOT
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0x70000006 \(MIPS_BASE_ADDRESS\) 0x0
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0x7000000a \(MIPS_LOCAL_GOTNO\) 2
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0x70000011 \(MIPS_SYMTABNO\) 20010
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0x70000012 \(MIPS_UNREFEXTNO\) 12
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0x70000013 \(MIPS_GOTSYM\) 0xa
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0x0000001e \(FLAGS\) STATIC_TLS
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0x00000000 \(NULL\) 0x0
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Relocation section '\.rel\.dyn' at offset 0x[0-9a-f]+ contains 20009 entries:
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Offset Info Type Sym.Value Sym. Name
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[0-9a-f ]+R_MIPS_NONE
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[0-9a-f ]+R_MIPS_TLS_DTPMOD
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[0-9a-f ]+R_MIPS_TLS_DTPMOD
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[0-9a-f ]+R_MIPS_TLS_DTPMOD 00000004 tlsvar_gd
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[0-9a-f ]+R_MIPS_TLS_DTPREL 00000004 tlsvar_gd
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[0-9a-f ]+R_MIPS_TLS_DTPMOD 00000004 tlsvar_gd
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[0-9a-f ]+R_MIPS_TLS_DTPREL 00000004 tlsvar_gd
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[0-9a-f ]+R_MIPS_TLS_TPREL3 00000008 tlsvar_ie
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[0-9a-f ]+R_MIPS_TLS_TPREL3 00000008 tlsvar_ie
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[0-9a-f ]+R_MIPS_REL32 000d7f48 sym_1_9526
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[0-9a-f ]+R_MIPS_REL32 000d65a4 sym_1_7885
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#...
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[0-9a-f ]+R_MIPS_REL32 000cf1b4 sym_1_0465
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[0-9a-f ]+R_MIPS_REL32 000e0df8 sym_2_8654
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