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| author | Alan Modra <amodra@gmail.com> | 2020-01-20 12:38:00 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2020-01-22 17:14:08 +1030 |
| commit | 9e7028aa1e788d666bad91fb20159da6c95bbab1 (patch) | |
| tree | 6c11e81207599183a4d222248ca2a26f282db861 /gas/config/tc-ppc.c | |
| parent | abc489c64a3137f3751797e8ce60d53a2c432e1d (diff) | |
| download | gdb-9e7028aa1e788d666bad91fb20159da6c95bbab1.zip gdb-9e7028aa1e788d666bad91fb20159da6c95bbab1.tar.gz gdb-9e7028aa1e788d666bad91fb20159da6c95bbab1.tar.bz2 | |
PowerPC64 __tls_get_addr_desc
This implements register saving and restoring in the __tls_get_addr
call stub, so that when glibc supports the optimized tls call stub gcc
can generate code that assumes only r0, r12 and of course r3 are
changed on a __tls_get_addr call. When gcc expects __tls_get_addr
calls to preserve registers the call will be to __tls_get_addr_desc,
which will be translated by the linker to a call to __tls_get_addr_opt.
bfd/
* elf64-ppc.h (struct ppc64_elf_params): Add no_tls_get_addr_regsave.
* elf64-ppc.c (struct ppc_link_hash_table): Add tga_desc and
tga_desc_fd.
(is_tls_get_addr): Match tga_desc and tga_desc_df too.
(STDU_R1_0R1, ADDI_R1_R1): Define.
(tls_get_addr_prologue, tls_get_addr_epilogue): New functions.
(ppc64_elf_tls_setup): Set up tga_desc and tga_desc_fd. Indirect
tga_desc_fd to opt_fd, and tga_desc to opt. Set
no_tls_get_addr_regsave.
(branch_reloc_hash_match): Add hash3 and hash4.
(ppc64_elf_tls_optimize): Handle tga_desc_fd and tga_desc too.
(ppc64_elf_size_dynamic_sections): Likewise.
(ppc64_elf_relocate_section): Likewise.
(plt_stub_size, build_plt_stub): Likewise. Size regsave
__tls_get_addr stub.
(build_tls_get_addr_stub): Build regsave __tls_get_addr stub and
eh_frame.
(ppc_size_one_stub): Handle tga_desc_fd and tga_desc too. Size
eh_frame for regsave __tls_get_addr.
gas/
* config/tc-ppc.c (parse_tls_arg): Handle tls arg for
__tls_get_addr_desc and __tls_get_addr_opt.
ld/
* emultempl/ppc64elf.em (ppc64_opt, PARSE_AND_LIST_LONGOPTS),
(PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Support
--tls-get-addr-regsave and --no-tls-get-addr-regsave.
(params): Init new field.
* ld.texi (--tls-get-addr-regsave, --no-tls-get-addr-regsave):
Document.
* testsuite/ld-powerpc/tlsdesc.s,
* testsuite/ld-powerpc/tlsdesc.d,
* testsuite/ld-powerpc/tlsdesc.wf,
* testsuite/ld-powerpc/tlsdesc2.d,
* testsuite/ld-powerpc/tlsdesc2.wf,
* testsuite/ld-powerpc/tlsexenors.d,
* testsuite/ld-powerpc/tlsexenors.r,
* testsuite/ld-powerpc/tlsexers.d,
* testsuite/ld-powerpc/tlsexers.r,
* testsuite/ld-powerpc/tlsexetocnors.d,
* testsuite/ld-powerpc/tlsexetocrs.d,
* testsuite/ld-powerpc/tlsexetocrs.r,
* testsuite/ld-powerpc/tlsopt6.d,
* testsuite/ld-powerpc/tlsopt6.wf: New.
* testsuite/ld-powerpc/powerpc.exp: Run new tests.
Diffstat (limited to 'gas/config/tc-ppc.c')
| -rw-r--r-- | gas/config/tc-ppc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c index 896b6b3..0b24298 100644 --- a/gas/config/tc-ppc.c +++ b/gas/config/tc-ppc.c @@ -3255,7 +3255,10 @@ parse_tls_arg (char **str, const expressionS *exp, struct ppc_fixup *tls_fix) ++sym_name; tls_fix->reloc = BFD_RELOC_NONE; - if (strcasecmp (sym_name, "__tls_get_addr") == 0) + if (strncasecmp (sym_name, "__tls_get_addr", 14) == 0 + && (sym_name[14] == 0 + || strcasecmp (sym_name + 14, "_desc") == 0 + || strcasecmp (sym_name + 14, "_opt") == 0)) { char *hold = input_line_pointer; input_line_pointer = *str + 1; |