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.
2020-01-20 10:08:00 +08:00
|
|
|
#source: tls.s
|
|
|
|
#source: tlslib.s
|
|
|
|
#as: -a64
|
|
|
|
#ld:
|
|
|
|
#readelf: -WSsrl
|
|
|
|
#target: powerpc64*-*-*
|
|
|
|
|
|
|
|
There are [0-9]+ section headers, starting at offset 0x[0-9a-f]+:
|
|
|
|
|
|
|
|
Section Headers:
|
|
|
|
+\[Nr\] Name +Type +Address +Off +Size +ES Flg Lk Inf Al
|
|
|
|
+\[[ 0-9]+\] +NULL +0+ 0+ 0+ 0+ +0 +0 +0
|
|
|
|
+\[[ 0-9]+\] \.interp +.*
|
|
|
|
+\[[ 0-9]+\] \.hash +.*
|
|
|
|
+\[[ 0-9]+\] \.dynsym +.*
|
|
|
|
+\[[ 0-9]+\] \.dynstr +.*
|
|
|
|
+\[[ 0-9]+\] \.rela\.dyn +.*
|
|
|
|
+\[[ 0-9]+\] \.rela\.plt +.*
|
|
|
|
+\[[ 0-9]+\] \.text +PROGBITS .* 0+164 0+ +AX +0 +0 +32
|
|
|
|
+\[[ 0-9]+\] \.tdata +PROGBITS .* 0+38 0+ WAT +0 +0 +8
|
|
|
|
+\[[ 0-9]+\] \.tbss +NOBITS .* 0+38 0+ WAT +0 +0 +8
|
|
|
|
+\[[ 0-9]+\] \.dynamic +DYNAMIC .* 0+160 10 +WA +4 +0 +8
|
|
|
|
+\[[ 0-9]+\] \.opd .*
|
|
|
|
+\[[ 0-9]+\] \.got +PROGBITS .* 0+30 08 +WA +0 +0 +256
|
|
|
|
+\[[ 0-9]+\] \.plt +.*
|
|
|
|
+\[[ 0-9]+\] \.symtab +.*
|
|
|
|
+\[[ 0-9]+\] \.strtab +.*
|
|
|
|
+\[[ 0-9]+\] \.shstrtab +.*
|
|
|
|
#...
|
|
|
|
|
|
|
|
Elf file type is EXEC \(Executable file\)
|
|
|
|
Entry point .*
|
|
|
|
There are [0-9]+ program headers, starting at offset [0-9]+
|
|
|
|
|
|
|
|
Program Headers:
|
|
|
|
+Type +Offset +VirtAddr +PhysAddr +FileSiz +MemSiz +Flg Align
|
|
|
|
+PHDR +0x0+40 0x0+10000040 0x0+10000040 0x0+150 0x0+150 R +0x8
|
|
|
|
+INTERP +0x0+190 0x0+10000190 0x0+10000190 0x0+11 0x0+11 R +0x1
|
|
|
|
+\[Requesting program interpreter: .*\]
|
|
|
|
+LOAD .* R E 0x10000
|
|
|
|
+LOAD .* RW +0x10000
|
|
|
|
+DYNAMIC .* RW +0x8
|
|
|
|
+TLS .* 0x0+38 0x0+70 R +0x8
|
|
|
|
|
|
|
|
Section to Segment mapping:
|
|
|
|
+Segment Sections\.\.\.
|
|
|
|
+0+ +
|
|
|
|
+01 +\.interp *
|
|
|
|
+02 +\.interp \.hash \.dynsym \.dynstr \.rela\.dyn \.rela\.plt \.text *
|
|
|
|
+03 +\.tdata \.dynamic \.opd \.got \.plt *
|
|
|
|
+04 +\.dynamic *
|
|
|
|
+05 +\.tdata \.tbss *
|
|
|
|
|
|
|
|
Relocation section '\.rela\.dyn' at offset .* contains 2 entries:
|
|
|
|
+Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend
|
|
|
|
[0-9a-f ]+R_PPC64_TPREL64 +0+ gd \+ 0
|
|
|
|
[0-9a-f ]+R_PPC64_DTPMOD64 +0+ ld \+ 0
|
|
|
|
|
|
|
|
Relocation section '\.rela\.plt' at offset .* contains 1 entry:
|
|
|
|
+Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend
|
|
|
|
[0-9a-f ]+R_PPC64_JMP_SLOT +0+ __tls_get_addr_opt \+ 0
|
|
|
|
|
|
|
|
Symbol table '\.dynsym' contains [0-9]+ entries:
|
|
|
|
+Num: +Value +Size +Type +Bind +Vis +Ndx +Name
|
|
|
|
.* NOTYPE +LOCAL +DEFAULT +UND *
|
|
|
|
.* TLS +GLOBAL +DEFAULT +UND gd
|
|
|
|
.* TLS +GLOBAL +DEFAULT +UND ld
|
|
|
|
.* FUNC +GLOBAL +DEFAULT +UND __tls_get_addr_opt
|
|
|
|
|
|
|
|
Symbol table '\.symtab' contains [0-9]+ entries:
|
|
|
|
+Num: +Value +Size +Type +Bind +Vis +Ndx +Name
|
|
|
|
.* 0+ +0 +NOTYPE +LOCAL +DEFAULT +UND *
|
2021-07-24 14:04:55 +08:00
|
|
|
.* SECTION +LOCAL +DEFAULT +1 \.interp
|
|
|
|
.* SECTION +LOCAL +DEFAULT +2 \.hash
|
|
|
|
.* SECTION +LOCAL +DEFAULT +3 \.dynsym
|
|
|
|
.* SECTION +LOCAL +DEFAULT +4 \.dynstr
|
|
|
|
.* SECTION +LOCAL +DEFAULT +5 \.rela\.dyn
|
|
|
|
.* SECTION +LOCAL +DEFAULT +6 \.rela\.plt
|
|
|
|
.* SECTION +LOCAL +DEFAULT +7 \.text
|
|
|
|
.* SECTION +LOCAL +DEFAULT +8 \.tdata
|
|
|
|
.* SECTION +LOCAL +DEFAULT +9 \.tbss
|
|
|
|
.* SECTION +LOCAL +DEFAULT +10 \.dynamic
|
|
|
|
.* SECTION +LOCAL +DEFAULT +11 \.opd
|
|
|
|
.* SECTION +LOCAL +DEFAULT +12 \.got
|
|
|
|
.* SECTION +LOCAL +DEFAULT +13 \.plt
|
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.
2020-01-20 10:08:00 +08:00
|
|
|
.* FILE +LOCAL +DEFAULT +ABS .*
|
|
|
|
.* NOTYPE +LOCAL +DEFAULT +ABS TLSMARK
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 gd4
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 ld4
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 ld5
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 ld6
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 ie4
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 le4
|
|
|
|
.* TLS +LOCAL +DEFAULT +8 le5
|
|
|
|
.* FILE +LOCAL +DEFAULT +ABS
|
|
|
|
.* OBJECT +LOCAL +DEFAULT +10 _DYNAMIC
|
|
|
|
.* NOTYPE +LOCAL +DEFAULT +7 __glink_PLTresolve
|
|
|
|
.* NOTYPE +LOCAL +DEFAULT +7 .*\.plt_call\.__tls_get_addr(|_opt)
|
|
|
|
.* GLOBAL +DEFAULT +UND gd
|
|
|
|
.* GLOBAL +DEFAULT +9 le0
|
|
|
|
.* GLOBAL +DEFAULT +9 ld0
|
|
|
|
.* GLOBAL +DEFAULT +9 le1
|
|
|
|
.* GLOBAL +DEFAULT +UND ld
|
|
|
|
.* FUNC +GLOBAL +DEFAULT +11 _start
|
|
|
|
.* TLS +GLOBAL +DEFAULT +9 ld2
|
|
|
|
.* TLS +GLOBAL +DEFAULT +9 ld1
|
|
|
|
.* NOTYPE +GLOBAL +DEFAULT +13 __bss_start
|
|
|
|
.* FUNC +GLOBAL +DEFAULT +UND __tls_get_addr_opt
|
|
|
|
.* NOTYPE +GLOBAL +DEFAULT +13 _edata
|
|
|
|
.* NOTYPE +GLOBAL +DEFAULT +13 _end
|
|
|
|
.* TLS +GLOBAL +DEFAULT +9 gd0
|
|
|
|
.* TLS +GLOBAL +DEFAULT +9 ie0
|