binutils-gdb/ld/testsuite/ld-cris/tls-ie-9.d
Alan Modra f26a32876b Dynamic TLS section symbols
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.
2019-07-13 09:57:50 +09:30

61 lines
1.6 KiB
Makefile

#as: --pic --no-underscore --em=criself
#ld: --shared -m crislinux --hash-style=sysv
#source: tls-ie-9.s
#source: tls128g.s
#source: tls-x1x2.s
#objdump: -s -t -R -p -T
# DSO with two R_CRIS_16_GOT_TPREL against different symbols. Check
# that we have proper NPTL/TLS markings and GOT.
.*: file format elf32-cris
Program Header:
LOAD off 0x0+ vaddr 0x0+ paddr 0x0+ align 2\*\*13
filesz 0x0+178 memsz 0x0+178 flags r-x
LOAD off 0x0+178 vaddr 0x0+2178 paddr 0x0+2178 align 2\*\*13
filesz 0x0+114 memsz 0x0+114 flags rw-
DYNAMIC off 0x0+200 vaddr 0x0+2200 paddr 0x0+2200 align 2\*\*2
filesz 0x0+78 memsz 0x0+78 flags rw-
TLS off 0x0+178 vaddr 0x0+2178 paddr 0x0+2178 align 2\*\*2
filesz 0x0+88 memsz 0x0+88 flags r--
Dynamic Section:
HASH 0x0+b4
STRTAB 0x0+140
SYMTAB 0x0+e0
STRSZ 0x0+18
SYMENT 0x0+10
RELA 0x0+158
RELASZ 0x0+18
RELAENT 0x0+c
FLAGS 0x0+10
private flags = 0:
SYMBOL TABLE:
#...
0+84 g \.tdata 0+4 x2
#...
0+80 g \.tdata 0+4 x1
#...
DYNAMIC SYMBOL TABLE:
#...
0+84 g D \.tdata 0+4 x2
#...
0+80 g D \.tdata 0+4 x1
#...
DYNAMIC RELOCATION RECORDS
OFFSET TYPE VALUE
0+2284 R_CRIS_32_TPREL x2
0+2288 R_CRIS_32_TPREL x1
Contents of section \.hash:
#...
Contents of section \.text:
0170 5fae1000 5fbe0c00 .*
#...
Contents of section \.got:
2278 00220+ 0+ 0+ 0+ .*
2288 00000000 .*