Introduce TLS descriptors for i386 and x86_64.
* include/inline-hashtab.h: New file, copied from 2005's
libiberty, with fix for memory leak imported afterwards by
Glauber de Oliveira Costa.
* elf/tlsdeschtab.h: New file.
* elf/dl-reloc.c (_dl_try_allocate_static_tls): Extract from...
(_dl_allocate_static_tls): ... here. Rearrange failure path.
(CHECK_STATIC_TLS): Move to...
* elf/dynamic-link.h: ... this file.
(TRY_STATIC_TLS): New macro.
* elf/dl-conflict.c (CHECK_STATIC_TLS, TRY_STATIC_TLS): Override.
* elf/elf.h (R_386_TLS_GOTDESC, R_386_TLS_DESC_CALL,
R_386_TLS_DESC): Define.
(R_X86_64_PC64, R_X86_GOTOFF64, R_X86_64_GOTPC32): Merge from
binutils.
(R_X86_64_GOTPC32_TLSDESC, R_X86_64_TLSDESC_CALL,
R_X86_64_TLSDESC): Define.
(R_386_NUM, R_X86_64_NUM): Adjust.
* sysdeps/i386/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/i386/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/i386/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_type_class): Mark R_386_TLS_DESC as PLT class.
(elf_machine_rel): Handle R_386_TLS_DESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
(elf_machine_lazy_rela): Likewise.
* sysdeps/i386/dl-tls.h (struct dl_tls_index): Name it.
* sysdeps/i386/dl-tlsdesc.S: New file.
* sysdeps/i386/dl-tlsdesc.h: New file.
* sysdeps/i386/tlsdesc.c: New file.
* sysdeps/i386/tlsdesc.sym: New file.
* sysdeps/i386/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table.
* sysdeps/x86_64/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/x86_64/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/x86_64/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_runtime_setup): Set up lazy TLSDESC GOT entry.
(elf_machine_type_class): Mark R_X86_64_TLSDESC as PLT class.
(elf_machine_rel): Handle R_X86_64_TLSDESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
* sysdeps/x86_64/dl-tls.h (struct dl_tls_index): Name it.
(__tls_get_addr): Do not declare for non-shared compiles.
* sysdeps/x86_64/dl-tlsdesc.S: New file.
* sysdeps/x86_64/dl-tlsdesc.h: New file.
* sysdeps/x86_64/tlsdesc.c: New file.
* sysdeps/x86_64/tlsdesc.sym: New file.
* sysdeps/x86_64/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table for both 32- and 64-bit structs.
2008-05-13 05:41:30 +00:00
|
|
|
/* Thread-local storage handling in the ELF dynamic linker. i386 version.
|
2016-01-04 16:05:18 +00:00
|
|
|
Copyright (C) 2004-2016 Free Software Foundation, Inc.
|
Introduce TLS descriptors for i386 and x86_64.
* include/inline-hashtab.h: New file, copied from 2005's
libiberty, with fix for memory leak imported afterwards by
Glauber de Oliveira Costa.
* elf/tlsdeschtab.h: New file.
* elf/dl-reloc.c (_dl_try_allocate_static_tls): Extract from...
(_dl_allocate_static_tls): ... here. Rearrange failure path.
(CHECK_STATIC_TLS): Move to...
* elf/dynamic-link.h: ... this file.
(TRY_STATIC_TLS): New macro.
* elf/dl-conflict.c (CHECK_STATIC_TLS, TRY_STATIC_TLS): Override.
* elf/elf.h (R_386_TLS_GOTDESC, R_386_TLS_DESC_CALL,
R_386_TLS_DESC): Define.
(R_X86_64_PC64, R_X86_GOTOFF64, R_X86_64_GOTPC32): Merge from
binutils.
(R_X86_64_GOTPC32_TLSDESC, R_X86_64_TLSDESC_CALL,
R_X86_64_TLSDESC): Define.
(R_386_NUM, R_X86_64_NUM): Adjust.
* sysdeps/i386/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/i386/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/i386/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_type_class): Mark R_386_TLS_DESC as PLT class.
(elf_machine_rel): Handle R_386_TLS_DESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
(elf_machine_lazy_rela): Likewise.
* sysdeps/i386/dl-tls.h (struct dl_tls_index): Name it.
* sysdeps/i386/dl-tlsdesc.S: New file.
* sysdeps/i386/dl-tlsdesc.h: New file.
* sysdeps/i386/tlsdesc.c: New file.
* sysdeps/i386/tlsdesc.sym: New file.
* sysdeps/i386/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table.
* sysdeps/x86_64/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/x86_64/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/x86_64/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_runtime_setup): Set up lazy TLSDESC GOT entry.
(elf_machine_type_class): Mark R_X86_64_TLSDESC as PLT class.
(elf_machine_rel): Handle R_X86_64_TLSDESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
* sysdeps/x86_64/dl-tls.h (struct dl_tls_index): Name it.
(__tls_get_addr): Do not declare for non-shared compiles.
* sysdeps/x86_64/dl-tlsdesc.S: New file.
* sysdeps/x86_64/dl-tlsdesc.h: New file.
* sysdeps/x86_64/tlsdesc.c: New file.
* sysdeps/x86_64/tlsdesc.sym: New file.
* sysdeps/x86_64/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table for both 32- and 64-bit structs.
2008-05-13 05:41:30 +00:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
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|
|
|
The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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|
|
|
License as published by the Free Software Foundation; either
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|
version 2.1 of the License, or (at your option) any later version.
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|
|
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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|
|
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You should have received a copy of the GNU Lesser General Public
|
2012-02-09 23:18:22 +00:00
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|
|
License along with the GNU C Library; if not, see
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|
|
|
<http://www.gnu.org/licenses/>. */
|
Introduce TLS descriptors for i386 and x86_64.
* include/inline-hashtab.h: New file, copied from 2005's
libiberty, with fix for memory leak imported afterwards by
Glauber de Oliveira Costa.
* elf/tlsdeschtab.h: New file.
* elf/dl-reloc.c (_dl_try_allocate_static_tls): Extract from...
(_dl_allocate_static_tls): ... here. Rearrange failure path.
(CHECK_STATIC_TLS): Move to...
* elf/dynamic-link.h: ... this file.
(TRY_STATIC_TLS): New macro.
* elf/dl-conflict.c (CHECK_STATIC_TLS, TRY_STATIC_TLS): Override.
* elf/elf.h (R_386_TLS_GOTDESC, R_386_TLS_DESC_CALL,
R_386_TLS_DESC): Define.
(R_X86_64_PC64, R_X86_GOTOFF64, R_X86_64_GOTPC32): Merge from
binutils.
(R_X86_64_GOTPC32_TLSDESC, R_X86_64_TLSDESC_CALL,
R_X86_64_TLSDESC): Define.
(R_386_NUM, R_X86_64_NUM): Adjust.
* sysdeps/i386/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/i386/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/i386/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_type_class): Mark R_386_TLS_DESC as PLT class.
(elf_machine_rel): Handle R_386_TLS_DESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
(elf_machine_lazy_rela): Likewise.
* sysdeps/i386/dl-tls.h (struct dl_tls_index): Name it.
* sysdeps/i386/dl-tlsdesc.S: New file.
* sysdeps/i386/dl-tlsdesc.h: New file.
* sysdeps/i386/tlsdesc.c: New file.
* sysdeps/i386/tlsdesc.sym: New file.
* sysdeps/i386/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table.
* sysdeps/x86_64/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/x86_64/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/x86_64/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_runtime_setup): Set up lazy TLSDESC GOT entry.
(elf_machine_type_class): Mark R_X86_64_TLSDESC as PLT class.
(elf_machine_rel): Handle R_X86_64_TLSDESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
* sysdeps/x86_64/dl-tls.h (struct dl_tls_index): Name it.
(__tls_get_addr): Do not declare for non-shared compiles.
* sysdeps/x86_64/dl-tlsdesc.S: New file.
* sysdeps/x86_64/dl-tlsdesc.h: New file.
* sysdeps/x86_64/tlsdesc.c: New file.
* sysdeps/x86_64/tlsdesc.sym: New file.
* sysdeps/x86_64/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table for both 32- and 64-bit structs.
2008-05-13 05:41:30 +00:00
|
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
#include <tls.h>
|
|
|
|
#include "tlsdesc.h"
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|
|
|
|
|
|
|
.text
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|
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|
/* This function is used to compute the TP offset for symbols in
|
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|
|
Static TLS, i.e., whose TP offset is the same for all
|
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|
threads.
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|
|
|
|
|
|
|
The incoming %eax points to the TLS descriptor, such that
|
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|
|
0(%eax) points to _dl_tlsdesc_return itself, and 4(%eax) holds
|
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|
the TP offset of the symbol corresponding to the object
|
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|
denoted by the argument. */
|
|
|
|
|
|
|
|
.hidden _dl_tlsdesc_return
|
|
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|
.global _dl_tlsdesc_return
|
|
|
|
.type _dl_tlsdesc_return,@function
|
|
|
|
cfi_startproc
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|
.align 16
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|
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_dl_tlsdesc_return:
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|
movl 4(%eax), %eax
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ret
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cfi_endproc
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|
.size _dl_tlsdesc_return, .-_dl_tlsdesc_return
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/* This function is used for undefined weak TLS symbols, for
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which the base address (i.e., disregarding any addend) should
|
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|
resolve to NULL.
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%eax points to the TLS descriptor, such that 0(%eax) points to
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_dl_tlsdesc_undefweak itself, and 4(%eax) holds the addend.
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We return the addend minus the TP, such that, when the caller
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adds TP, it gets the addend back. If that's zero, as usual,
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that's most likely a NULL pointer. */
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.hidden _dl_tlsdesc_undefweak
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.global _dl_tlsdesc_undefweak
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|
.type _dl_tlsdesc_undefweak,@function
|
|
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|
cfi_startproc
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|
|
.align 16
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_dl_tlsdesc_undefweak:
|
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movl 4(%eax), %eax
|
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subl %gs:0, %eax
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|
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|
ret
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cfi_endproc
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.size _dl_tlsdesc_undefweak, .-_dl_tlsdesc_undefweak
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|
#ifdef SHARED
|
|
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|
.hidden _dl_tlsdesc_dynamic
|
|
|
|
.global _dl_tlsdesc_dynamic
|
|
|
|
.type _dl_tlsdesc_dynamic,@function
|
|
|
|
|
|
|
|
/* This function is used for symbols that need dynamic TLS.
|
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|
%eax points to the TLS descriptor, such that 0(%eax) points to
|
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|
_dl_tlsdesc_dynamic itself, and 4(%eax) points to a struct
|
|
|
|
tlsdesc_dynamic_arg object. It must return in %eax the offset
|
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|
between the thread pointer and the object denoted by the
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|
argument, without clobbering any registers.
|
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The assembly code that follows is a rendition of the following
|
|
|
|
C code, hand-optimized a little bit.
|
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ptrdiff_t
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|
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|
__attribute__ ((__regparm__ (1)))
|
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|
|
_dl_tlsdesc_dynamic (struct tlsdesc *tdp)
|
|
|
|
{
|
|
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|
struct tlsdesc_dynamic_arg *td = tdp->arg;
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|
dtv_t *dtv = *(dtv_t **)((char *)__thread_pointer + DTV_OFFSET);
|
|
|
|
if (__builtin_expect (td->gen_count <= dtv[0].counter
|
|
|
|
&& (dtv[td->tlsinfo.ti_module].pointer.val
|
|
|
|
!= TLS_DTV_UNALLOCATED),
|
|
|
|
1))
|
|
|
|
return dtv[td->tlsinfo.ti_module].pointer.val + td->tlsinfo.ti_offset
|
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|
|
- __thread_pointer;
|
|
|
|
|
|
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|
return ___tls_get_addr (&td->tlsinfo) - __thread_pointer;
|
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|
}
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|
|
|
*/
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|
cfi_startproc
|
|
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|
.align 16
|
|
|
|
_dl_tlsdesc_dynamic:
|
|
|
|
/* Like all TLS resolvers, preserve call-clobbered registers.
|
|
|
|
We need two scratch regs anyway. */
|
|
|
|
subl $28, %esp
|
|
|
|
cfi_adjust_cfa_offset (28)
|
|
|
|
movl %ecx, 20(%esp)
|
|
|
|
movl %edx, 24(%esp)
|
|
|
|
movl TLSDESC_ARG(%eax), %eax
|
|
|
|
movl %gs:DTV_OFFSET, %edx
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|
|
movl TLSDESC_GEN_COUNT(%eax), %ecx
|
|
|
|
cmpl (%edx), %ecx
|
|
|
|
ja .Lslow
|
|
|
|
movl TLSDESC_MODID(%eax), %ecx
|
|
|
|
movl (%edx,%ecx,8), %edx
|
|
|
|
cmpl $-1, %edx
|
|
|
|
je .Lslow
|
|
|
|
movl TLSDESC_MODOFF(%eax), %eax
|
|
|
|
addl %edx, %eax
|
|
|
|
.Lret:
|
|
|
|
movl 20(%esp), %ecx
|
|
|
|
subl %gs:0, %eax
|
|
|
|
movl 24(%esp), %edx
|
|
|
|
addl $28, %esp
|
|
|
|
cfi_adjust_cfa_offset (-28)
|
|
|
|
ret
|
|
|
|
.p2align 4,,7
|
|
|
|
.Lslow:
|
|
|
|
cfi_adjust_cfa_offset (28)
|
2014-12-21 17:12:04 +00:00
|
|
|
call HIDDEN_JUMPTARGET (___tls_get_addr)
|
Introduce TLS descriptors for i386 and x86_64.
* include/inline-hashtab.h: New file, copied from 2005's
libiberty, with fix for memory leak imported afterwards by
Glauber de Oliveira Costa.
* elf/tlsdeschtab.h: New file.
* elf/dl-reloc.c (_dl_try_allocate_static_tls): Extract from...
(_dl_allocate_static_tls): ... here. Rearrange failure path.
(CHECK_STATIC_TLS): Move to...
* elf/dynamic-link.h: ... this file.
(TRY_STATIC_TLS): New macro.
* elf/dl-conflict.c (CHECK_STATIC_TLS, TRY_STATIC_TLS): Override.
* elf/elf.h (R_386_TLS_GOTDESC, R_386_TLS_DESC_CALL,
R_386_TLS_DESC): Define.
(R_X86_64_PC64, R_X86_GOTOFF64, R_X86_64_GOTPC32): Merge from
binutils.
(R_X86_64_GOTPC32_TLSDESC, R_X86_64_TLSDESC_CALL,
R_X86_64_TLSDESC): Define.
(R_386_NUM, R_X86_64_NUM): Adjust.
* sysdeps/i386/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/i386/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/i386/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_type_class): Mark R_386_TLS_DESC as PLT class.
(elf_machine_rel): Handle R_386_TLS_DESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
(elf_machine_lazy_rela): Likewise.
* sysdeps/i386/dl-tls.h (struct dl_tls_index): Name it.
* sysdeps/i386/dl-tlsdesc.S: New file.
* sysdeps/i386/dl-tlsdesc.h: New file.
* sysdeps/i386/tlsdesc.c: New file.
* sysdeps/i386/tlsdesc.sym: New file.
* sysdeps/i386/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table.
* sysdeps/x86_64/Makefile (sysdep-dl-routines, sysdep_routines,
systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir.
(gen-as-const-headers): Add tlsdesc.sym to csu subdir.
* sysdeps/x86_64/dl-lookupcfg.h: New file. Introduce _dl_unmap to
release tlsdesc_table.
* sysdeps/x86_64/dl-machine.h: Include dl-tlsdesc.h.
(elf_machine_runtime_setup): Set up lazy TLSDESC GOT entry.
(elf_machine_type_class): Mark R_X86_64_TLSDESC as PLT class.
(elf_machine_rel): Handle R_X86_64_TLSDESC.
(elf_machine_rela): Likewise.
(elf_machine_lazy_rel): Likewise.
* sysdeps/x86_64/dl-tls.h (struct dl_tls_index): Name it.
(__tls_get_addr): Do not declare for non-shared compiles.
* sysdeps/x86_64/dl-tlsdesc.S: New file.
* sysdeps/x86_64/dl-tlsdesc.h: New file.
* sysdeps/x86_64/tlsdesc.c: New file.
* sysdeps/x86_64/tlsdesc.sym: New file.
* sysdeps/x86_64/bits/linkmap.h (struct link_map_machine): Add
tlsdesc_table for both 32- and 64-bit structs.
2008-05-13 05:41:30 +00:00
|
|
|
jmp .Lret
|
|
|
|
cfi_endproc
|
|
|
|
.size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic
|
|
|
|
#endif /* SHARED */
|
|
|
|
|
|
|
|
/* This function is a wrapper for a lazy resolver for TLS_DESC
|
|
|
|
REL relocations that reference the *ABS* segment in their own
|
|
|
|
link maps. %ebx points to the caller's GOT. %eax points to a
|
|
|
|
TLS descriptor, such that 0(%eax) holds the address of the
|
|
|
|
resolver wrapper itself (unless some other thread beat us to
|
|
|
|
it) and 4(%eax) holds the addend in the relocation.
|
|
|
|
|
|
|
|
When the actual resolver returns, it will have adjusted the
|
|
|
|
TLS descriptor such that we can tail-call it for it to return
|
|
|
|
the TP offset of the symbol. */
|
|
|
|
|
|
|
|
.hidden _dl_tlsdesc_resolve_abs_plus_addend
|
|
|
|
.global _dl_tlsdesc_resolve_abs_plus_addend
|
|
|
|
.type _dl_tlsdesc_resolve_abs_plus_addend,@function
|
|
|
|
cfi_startproc
|
|
|
|
.align 16
|
|
|
|
_dl_tlsdesc_resolve_abs_plus_addend:
|
|
|
|
0:
|
|
|
|
pushl %eax
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %ecx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %edx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl $1f - 0b, %ecx
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|
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|
movl 4(%ebx), %edx
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|
|
|
call _dl_tlsdesc_resolve_abs_plus_addend_fixup
|
|
|
|
1:
|
|
|
|
popl %edx
|
|
|
|
cfi_adjust_cfa_offset (-4)
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|
|
|
popl %ecx
|
|
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|
cfi_adjust_cfa_offset (-4)
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|
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|
popl %eax
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|
cfi_adjust_cfa_offset (-4)
|
|
|
|
jmp *(%eax)
|
|
|
|
cfi_endproc
|
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|
|
.size _dl_tlsdesc_resolve_abs_plus_addend, .-_dl_tlsdesc_resolve_abs_plus_addend
|
|
|
|
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|
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|
/* This function is a wrapper for a lazy resolver for TLS_DESC
|
|
|
|
REL relocations that had zero addends. %ebx points to the
|
|
|
|
caller's GOT. %eax points to a TLS descriptor, such that
|
|
|
|
0(%eax) holds the address of the resolver wrapper itself
|
|
|
|
(unless some other thread beat us to it) and 4(%eax) holds a
|
|
|
|
pointer to the relocation.
|
|
|
|
|
|
|
|
When the actual resolver returns, it will have adjusted the
|
|
|
|
TLS descriptor such that we can tail-call it for it to return
|
|
|
|
the TP offset of the symbol. */
|
|
|
|
|
|
|
|
.hidden _dl_tlsdesc_resolve_rel
|
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|
|
.global _dl_tlsdesc_resolve_rel
|
|
|
|
.type _dl_tlsdesc_resolve_rel,@function
|
|
|
|
cfi_startproc
|
|
|
|
.align 16
|
|
|
|
_dl_tlsdesc_resolve_rel:
|
|
|
|
0:
|
|
|
|
pushl %eax
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %ecx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %edx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl $1f - 0b, %ecx
|
|
|
|
movl 4(%ebx), %edx
|
|
|
|
call _dl_tlsdesc_resolve_rel_fixup
|
|
|
|
1:
|
|
|
|
popl %edx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %ecx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %eax
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
jmp *(%eax)
|
|
|
|
cfi_endproc
|
|
|
|
.size _dl_tlsdesc_resolve_rel, .-_dl_tlsdesc_resolve_rel
|
|
|
|
|
|
|
|
/* This function is a wrapper for a lazy resolver for TLS_DESC
|
|
|
|
RELA relocations. %ebx points to the caller's GOT. %eax
|
|
|
|
points to a TLS descriptor, such that 0(%eax) holds the
|
|
|
|
address of the resolver wrapper itself (unless some other
|
|
|
|
thread beat us to it) and 4(%eax) holds a pointer to the
|
|
|
|
relocation.
|
|
|
|
|
|
|
|
When the actual resolver returns, it will have adjusted the
|
|
|
|
TLS descriptor such that we can tail-call it for it to return
|
|
|
|
the TP offset of the symbol. */
|
|
|
|
|
|
|
|
.hidden _dl_tlsdesc_resolve_rela
|
|
|
|
.global _dl_tlsdesc_resolve_rela
|
|
|
|
.type _dl_tlsdesc_resolve_rela,@function
|
|
|
|
cfi_startproc
|
|
|
|
.align 16
|
|
|
|
_dl_tlsdesc_resolve_rela:
|
|
|
|
0:
|
|
|
|
pushl %eax
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %ecx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %edx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl $1f - 0b, %ecx
|
|
|
|
movl 4(%ebx), %edx
|
|
|
|
call _dl_tlsdesc_resolve_rela_fixup
|
|
|
|
1:
|
|
|
|
popl %edx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %ecx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %eax
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
jmp *(%eax)
|
|
|
|
cfi_endproc
|
|
|
|
.size _dl_tlsdesc_resolve_rela, .-_dl_tlsdesc_resolve_rela
|
|
|
|
|
|
|
|
/* This function is a placeholder for lazy resolving of TLS
|
|
|
|
relocations. Once some thread starts resolving a TLS
|
|
|
|
relocation, it sets up the TLS descriptor to use this
|
|
|
|
resolver, such that other threads that would attempt to
|
|
|
|
resolve it concurrently may skip the call to the original lazy
|
|
|
|
resolver and go straight to a condition wait.
|
|
|
|
|
|
|
|
When the actual resolver returns, it will have adjusted the
|
|
|
|
TLS descriptor such that we can tail-call it for it to return
|
|
|
|
the TP offset of the symbol. */
|
|
|
|
|
|
|
|
.hidden _dl_tlsdesc_resolve_hold
|
|
|
|
.global _dl_tlsdesc_resolve_hold
|
|
|
|
.type _dl_tlsdesc_resolve_hold,@function
|
|
|
|
cfi_startproc
|
|
|
|
.align 16
|
|
|
|
_dl_tlsdesc_resolve_hold:
|
|
|
|
0:
|
|
|
|
pushl %eax
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %ecx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
pushl %edx
|
|
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl $1f - 0b, %ecx
|
|
|
|
movl 4(%ebx), %edx
|
|
|
|
call _dl_tlsdesc_resolve_hold_fixup
|
|
|
|
1:
|
|
|
|
popl %edx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %ecx
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
popl %eax
|
|
|
|
cfi_adjust_cfa_offset (-4)
|
|
|
|
jmp *(%eax)
|
|
|
|
cfi_endproc
|
|
|
|
.size _dl_tlsdesc_resolve_hold, .-_dl_tlsdesc_resolve_hold
|