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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.
52 lines
1.4 KiB
Makefile
52 lines
1.4 KiB
Makefile
#as: --pic --no-underscore --em=criself
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#ld: --shared -m crislinux --hash-style=sysv
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#source: tls-ld-7.s
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#source: tls128g.s
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#source: tls-hx1x2.s
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#objdump: -s -t -R -p
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# DSO with two R_CRIS_32_DTPRELs against different hidden symbols.
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# Check that we have proper NPTL/TLS markings and GOT.
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.*: file format elf32-cris
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Program Header:
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LOAD off 0x0+ vaddr 0x0+ paddr 0x0+ align 2\*\*13
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filesz 0x0+13c memsz 0x0+13c flags r-x
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LOAD off 0x0+13c vaddr 0x0+213c paddr 0x0+213c align 2\*\*13
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filesz 0x0+10c memsz 0x0+10c flags rw-
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DYNAMIC off 0x0+1c4 vaddr 0x0+21c4 paddr 0x0+21c4 align 2\*\*2
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filesz 0x0+70 memsz 0x0+70 flags rw-
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TLS off 0x0+13c vaddr 0x0+213c paddr 0x0+213c align 2\*\*2
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filesz 0x0+88 memsz 0x0+88 flags r--
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Dynamic Section:
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HASH 0x0+b4
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STRTAB 0x0+110
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SYMTAB 0x0+d0
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STRSZ 0x0+11
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SYMENT 0x0+10
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RELA 0x0+124
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RELASZ 0x0+c
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RELAENT 0x0+c
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private flags = 0:
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SYMBOL TABLE:
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#...
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0+84 l \.tdata 0+4 x2
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0+80 l \.tdata 0+4 x1
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#...
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DYNAMIC RELOCATION RECORDS
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OFFSET TYPE VALUE
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0+2240 R_CRIS_DTPMOD \*ABS\*
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Contents of section \.hash:
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#...
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Contents of section \.text:
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0130 6fae80+ 0+6fbe 840+ .*
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#...
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Contents of section \.got:
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2234 c4210+ 0+ 0+ 0+ .*
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2244 0+ .*
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