6eaa7fb59b
We can generate i386 TLS code sequences for general and local dynamic models without PLT, which uses indirect call via GOT: call *___tls_get_addr@GOT(%reg) where EBX register isn't required as GOT base, instead of direct call: call ___tls_get_addr[@PLT] which requires EBX register as GOT base. Since direct call is 4-byte long and indirect call, is 5-byte long, the extra one byte must be handled properly. For general dynamic model, 7-byte lea instruction before call instruction is replaced by 6-byte one to make room for indirect call. For local dynamic model, we simply use 5-byte indirect call. TLS linker optimization is updated to recognize new instruction patterns. For local dynamic model to local exec model transition, we generate a 6-byte lea instruction as nop, instead of a 1-byte nop plus a 4-byte lea instruction. Since linker may convert call ___tls_get_addr[@PLT] to addr32 call ____tls_get_addr when producing static executable, both patterns are recognized. bfd/ * elf64-i386.c (elf_i386_link_hash_entry): Add tls_get_addr. (elf_i386_link_hash_newfunc): Initialize tls_get_addr to 2. (elf_i386_check_tls_transition): Check indirect call and direct call with the addr32 prefix for general and local dynamic models. Set the tls_get_addr feild. (elf_i386_convert_load_reloc): Always use addr32 prefix for indirect ___tls_get_addr call via GOT. (elf_i386_relocate_section): Handle GD->LE, GD->IE and LD->LE transitions with indirect call and direct call with the addr32 prefix. ld/ * testsuite/ld-i386/i386.exp: Run libtlspic2.so, tlsbin2, tlsgd3, tlsld2, tlsgd4, tlspie3a, tlspie3b and tlspie3c. * testsuite/ld-i386/pass.out: New file. * testsuite/ld-i386/tls-def1.c: Likewise. * testsuite/ld-i386/tls-gd1.S: Likewise. * testsuite/ld-i386/tls-ld1.S: Likewise. * testsuite/ld-i386/tls-main1.c: Likewise. * testsuite/ld-i386/tls.exp: Likewise. * testsuite/ld-i386/tlsbin2-nacl.rd: Likewise. * testsuite/ld-i386/tlsbin2.dd: Likewise. * testsuite/ld-i386/tlsbin2.rd: Likewise. * testsuite/ld-i386/tlsbin2.sd: Likewise. * testsuite/ld-i386/tlsbin2.td: Likewise. * testsuite/ld-i386/tlsbinpic2.s: Likewise. * testsuite/ld-i386/tlsgd3.dd: Likewise. * testsuite/ld-i386/tlsgd3.s: Likewise. * testsuite/ld-i386/tlsgd4.d: Likewise. * testsuite/ld-i386/tlsgd4.s: Likewise. * testsuite/ld-i386/tlsld2.s: Likewise. * testsuite/ld-i386/tlspic2-nacl.rd: Likewise. * testsuite/ld-i386/tlspic2.dd: Likewise. * testsuite/ld-i386/tlspic2.rd: Likewise. * testsuite/ld-i386/tlspic2.sd: Likewise. * testsuite/ld-i386/tlspic2.td: Likewise. * testsuite/ld-i386/tlspic3.s: Likewise. * testsuite/ld-i386/tlspie3.s: Likewise. * testsuite/ld-i386/tlspie3a.d: Likewise. * testsuite/ld-i386/tlspie3b.d: Likewise. * testsuite/ld-i386/tlspie3c.d: Likewise.
125 lines
2.9 KiB
Text
125 lines
2.9 KiB
Text
# Expect script for i386 TLS tests.
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# Copyright (C) 2016 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# The following tests require running the executable generated by ld,
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# or enough of a build environment to create a fully linked executable.
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# This is not commonly available when testing a cross-built linker.
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if ![isnative] {
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return
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}
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# Only on Linux for now.
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if ![istarget "i?86-*-linux*"] {
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return
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}
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# Check to see if the C compiler works
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if { [which $CC] == 0 } {
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return
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}
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run_cc_link_tests [list \
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[list \
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"Build tls-def1.o tls-main1.o" \
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"" \
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"-fPIE" \
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{tls-def1.c tls-main1.c} \
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] \
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[list \
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"Build tls-gd1.o tls-ld1.o" \
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"" \
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"-fPIC -Wa,-mrelax-relocations=yes" \
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{tls-gd1.S tls-ld1.S} \
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] \
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[list \
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"Build libtls-1a.so" \
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"-shared tmpdir/tls-def1.o" \
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"" \
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{dummy.s} \
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{} \
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"libtls-1a.so" \
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] \
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[list \
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"Build libtls-1b.so" \
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"-shared tmpdir/tls-gd1.o tmpdir/tls-ld1.o" \
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"" \
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{dummy.s} \
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{} \
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"libtls-1b.so" \
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] \
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]
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run_ld_link_exec_tests [] [list \
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[list \
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"TLS GD/LD -> LE transition without PLT (dynamic)" \
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"tmpdir/tls-def1.o tmpdir/tls-main1.o tmpdir/tls-gd1.o \
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tmpdir/tls-ld1.o" \
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"" \
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{ dummy.s } \
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"tls-1a" \
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"pass.out" \
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] \
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[list \
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"TLS GD/LD -> LE transition without PLT (PIE)" \
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"-pie tmpdir/tls-def1.o tmpdir/tls-main1.o tmpdir/tls-gd1.o \
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tmpdir/tls-ld1.o" \
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"" \
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{ dummy.s } \
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"tls-1b" \
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"pass.out" \
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] \
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[list \
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"TLS GD/LD -> LE transition without PLT (static)" \
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"-static tmpdir/tls-def1.o tmpdir/tls-main1.o tmpdir/tls-gd1.o \
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tmpdir/tls-ld1.o" \
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"" \
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{ dummy.s } \
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"tls-1c" \
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"pass.out" \
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] \
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[list \
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"TLS GD/LD -> IE transition without PLT" \
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"tmpdir/tls-main1.o tmpdir/tls-gd1.o tmpdir/tls-ld1.o \
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tmpdir/libtls-1a.so -R tmpdir" \
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"" \
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{ dummy.s } \
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"tls-1d" \
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"pass.out" \
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] \
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[list \
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"TLS without PLT (1)" \
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"tmpdir/tls-main1.o \
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tmpdir/libtls-1a.so tmpdir/libtls-1b.so -R tmpdir" \
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"" \
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{ dummy.s } \
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"tls-1e" \
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"pass.out" \
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] \
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[list \
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"TLS without PLT (2)" \
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"tmpdir/tls-main1.o tmpdir/tls-def1.o \
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tmpdir/libtls-1b.so -R tmpdir" \
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"" \
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{ dummy.s } \
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"tls-1f" \
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"pass.out" \
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] \
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]
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