diff options
Diffstat (limited to 'sysdeps/arm/dl-tlsdesc.S')
| -rw-r--r-- | sysdeps/arm/dl-tlsdesc.S | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/sysdeps/arm/dl-tlsdesc.S b/sysdeps/arm/dl-tlsdesc.S deleted file mode 100644 index e7bed02188..0000000000 --- a/sysdeps/arm/dl-tlsdesc.S +++ /dev/null @@ -1,218 +0,0 @@ -/* Thread-local storage handling in the ELF dynamic linker. ARM version. - Copyright (C) 2006-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <arm-features.h> -#include <tls.h> -#include "tlsdesc.h" - - .text - @ emit debug information with cfi - @ use arm-specific pseudos for unwinding itself - CFI_SECTIONS - .hidden _dl_tlsdesc_return - .global _dl_tlsdesc_return - .type _dl_tlsdesc_return,#function - cfi_startproc - eabi_fnstart - .align 2 -_dl_tlsdesc_return: - ldr r0, [r0] - BX (lr) - eabi_fnend - cfi_endproc - .size _dl_tlsdesc_return, .-_dl_tlsdesc_return - - .hidden _dl_tlsdesc_undefweak - .global _dl_tlsdesc_undefweak - .type _dl_tlsdesc_undefweak,#function - cfi_startproc - eabi_fnstart - .align 2 -_dl_tlsdesc_undefweak: - GET_TLS (r1) - rsb r0, r0, #0 - BX (lr) - cfi_endproc - eabi_fnend - .size _dl_tlsdesc_undefweak, .-_dl_tlsdesc_undefweak - -#ifdef SHARED - .hidden _dl_tlsdesc_dynamic - .global _dl_tlsdesc_dynamic - .type _dl_tlsdesc_dynamic,#function - - -/* - The assembly code that follows is a rendition of the following - C code, hand-optimized a little bit. - -ptrdiff_t -_dl_tlsdesc_dynamic(struct tlsdesc *tdp) -{ - struct tlsdesc_dynamic_arg *td = tdp->argument.pointer; - dtv_t *dtv = (dtv_t *)THREAD_DTV(); - 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 - __builtin_thread_pointer(); - - return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer(); -} - -*/ - cfi_startproc - eabi_fnstart - .align 2 -_dl_tlsdesc_dynamic: - /* Our calling convention is to clobber r0, r1 and the processor - flags. All others that are modified must be saved */ - eabi_save ({r2,r3,r4,lr}) - push {r2,r3,r4,lr} - cfi_adjust_cfa_offset (16) - cfi_rel_offset (r2,0) - cfi_rel_offset (r3,4) - cfi_rel_offset (r4,8) - cfi_rel_offset (lr,12) - ldr r1, [r0] /* td */ - GET_TLS (lr) - mov r4, r0 /* r4 = tp */ - ldr r0, [r0] - ldr r2, [r1, #8] /* gen_count */ - ldr r3, [r0] - cmp r2, r3 - bhi 1f - ldr r3, [r1] -#ifndef ARM_NO_INDEX_REGISTER - ldr r2, [r0, r3, lsl #3] -#else - add lr, r0, r3, lsl #3 - ldr r2, [lr] -#endif - cmn r2, #1 - ittt ne - ldrne r3, [r1, #4] - addne r3, r2, r3 - rsbne r0, r4, r3 - bne 2f -1: mov r0, r1 - bl __tls_get_addr - rsb r0, r4, r0 -2: -#if ((defined (__ARM_ARCH_4T__) && defined (__THUMB_INTERWORK__)) \ - || defined (ARM_ALWAYS_BX)) - pop {r2,r3,r4, lr} - cfi_adjust_cfa_offset (-16) - cfi_restore (lr) - cfi_restore (r4) - cfi_restore (r3) - cfi_restore (r2) - bx lr -#else - pop {r2,r3,r4, pc} -#endif - eabi_fnend - cfi_endproc - .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic -#endif /* SHARED */ - -/* lazy resolved for tls descriptors. */ - .hidden _dl_tlsdesc_lazy_resolver - .global _dl_tlsdesc_lazy_resolver - .type _dl_tlsdesc_lazy_resolver,#function - cfi_startproc - eabi_fnstart - .align 2 -_dl_tlsdesc_lazy_resolver: - /* r0 points at the tlsdesc, - r1 points at the GOT - r2 was pushed by the trampoline and used as a temp, - we need to pop it here. - We push the remaining call-clobbered registers here, and also - R1 -- to keep the stack correctly aligned. */ - /* Tell the unwinder that r2 has already been pushed. */ - eabi_save ({r2}) - cfi_adjust_cfa_offset (4) - cfi_rel_offset (r2, 0) - eabi_save ({r0,r1,r3,ip,lr}) - push {r0, r1, r3, ip, lr} - cfi_adjust_cfa_offset (20) - cfi_rel_offset (r0, 0) - cfi_rel_offset (r1, 4) - cfi_rel_offset (r3, 8) - cfi_rel_offset (ip, 12) - cfi_rel_offset (lr, 16) - bl _dl_tlsdesc_lazy_resolver_fixup - pop {r0, r1, r3, ip, lr} - cfi_adjust_cfa_offset (-20) - cfi_restore (lr) - cfi_restore (ip) - cfi_restore (r3) - cfi_restore (r1) - cfi_restore (r0) - pop {r2} - cfi_adjust_cfa_offset (-4) - cfi_restore (r2) - ldr r1, [r0, #4] - BX (r1) - eabi_fnend - cfi_endproc - .size _dl_tlsdesc_lazy_resolver, .-_dl_tlsdesc_lazy_resolver - -/* Holder for lazy tls descriptors being resolve in another thread. - - Our calling convention is to clobber r0, r1 and the processor - flags. All others that are modified must be saved */ - .hidden _dl_tlsdesc_resolve_hold - .global _dl_tlsdesc_resolve_hold - .type _dl_tlsdesc_resolve_hold,#function - cfi_startproc - eabi_fnstart - .align 2 -_dl_tlsdesc_resolve_hold: - /* r0 is saved so its original value can be used after the call and - r1 is saved only to keep the stack aligned. (r0 points to the tls - descriptor, it is passed to _dl_tlsdesc_resolve_hold_fixup which - is a void function that may clobber r0, later r0 is used to load - the new resolver.) */ - eabi_save ({r0,r1,r2,r3,ip,lr}) - push {r0, r1, r2, r3, ip, lr} - cfi_adjust_cfa_offset (24) - cfi_rel_offset (r0, 0) - cfi_rel_offset (r1, 4) - cfi_rel_offset (r2, 8) - cfi_rel_offset (r3, 12) - cfi_rel_offset (ip, 16) - cfi_rel_offset (lr, 20) - adr r1, _dl_tlsdesc_resolve_hold - bl _dl_tlsdesc_resolve_hold_fixup - pop {r0, r1, r2, r3, ip, lr} - cfi_adjust_cfa_offset (-24) - cfi_restore (lr) - cfi_restore (ip) - cfi_restore (r3) - cfi_restore (r2) - cfi_restore (r1) - cfi_restore (r0) - ldr r1, [r0, #4] - BX (r1) - eabi_fnend - cfi_endproc - .size _dl_tlsdesc_resolve_hold, .-_dl_tlsdesc_resolve_hold |