188 lines
4.0 KiB
ArmAsm
188 lines
4.0 KiB
ArmAsm
/* Copyright (C) 2000-2018 Free Software Foundation, Inc.
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Contributed by Jes Sorensen, <Jes.Sorensen@cern.ch>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC 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
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "auto-host.h"
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.section .ctors,"aw","progbits"
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.align 8
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__CTOR_LIST__:
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data8 -1
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.section .dtors,"aw","progbits"
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.align 8
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__DTOR_LIST__:
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data8 -1
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.section .sdata
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.type dtor_ptr,@object
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.size dtor_ptr,8
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dtor_ptr:
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data8 @gprel(__DTOR_LIST__ + 8)
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/* A handle for __cxa_finalize to manage c++ local destructors. */
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.global __dso_handle
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.type __dso_handle,@object
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.size __dso_handle,8
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#ifdef SHARED
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.section .data
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__dso_handle:
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data8 __dso_handle
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#else
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.section .bss
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.align 8
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__dso_handle:
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.skip 8
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#endif
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.hidden __dso_handle
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#if HAVE_INITFINI_ARRAY_SUPPORT
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.section .fini_array, "a"
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data8 @fptr(__do_global_dtors_aux)
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.section .init_array, "a"
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data8 @fptr(__do_global_ctors_aux)
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#else /* !HAVE_INITFINI_ARRAY_SUPPORT */
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/*
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* Fragment of the ELF _fini routine that invokes our dtor cleanup.
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*
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* We make the call by indirection, because in large programs the
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* .fini and .init sections are not in range of the destination, and
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* we cannot allow the linker to insert a stub at the end of this
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* fragment of the _fini function. Further, Itanium does not implement
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* the long branch instructions, and we do not wish every program to
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* trap to the kernel for emulation.
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*
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* Note that we require __do_global_dtors_aux to preserve the GP,
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* so that the next fragment in .fini gets the right value.
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*/
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.section .fini,"ax","progbits"
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{ .mlx
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movl r2 = @pcrel(__do_global_dtors_aux - 16)
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}
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{ .mii
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mov r3 = ip
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;;
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add r2 = r2, r3
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;;
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}
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{ .mib
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nop 0
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mov b6 = r2
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br.call.sptk.many b0 = b6
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}
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#endif /* !HAVE_INITFINI_ARRAY_SUPPORT */
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.section .text
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.align 32
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.proc __do_global_dtors_aux
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__do_global_dtors_aux:
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.prologue
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#ifndef SHARED
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.save ar.pfs, r35
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alloc loc3 = ar.pfs, 0, 4, 1, 0
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addl loc0 = @gprel(dtor_ptr), gp
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.save rp, loc1
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mov loc1 = rp
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.body
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mov loc2 = gp
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nop 0
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br.sptk.many .entry
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#else
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/*
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if (__cxa_finalize)
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__cxa_finalize(__dso_handle)
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*/
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.save ar.pfs, r35
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alloc loc3 = ar.pfs, 0, 4, 1, 0
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addl loc0 = @gprel(dtor_ptr), gp
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addl r16 = @ltoff(@fptr(__cxa_finalize)), gp
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;;
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ld8 r16 = [r16]
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;;
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addl out0 = @ltoff(__dso_handle), gp
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cmp.ne p7, p0 = r0, r16
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;;
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ld8 out0 = [out0]
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(p7) ld8 r18 = [r16], 8
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.save rp, loc1
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mov loc1 = rp
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.body
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;;
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mov loc2 = gp
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(p7) ld8 gp = [r16]
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(p7) mov b6 = r18
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nop 0
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nop 0
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(p7) br.call.sptk.many rp = b6
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;;
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nop 0
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nop 0
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br.sptk.many .entry
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#endif
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/*
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do {
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dtor_ptr++;
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(*(dtor_ptr-1)) ();
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} while (dtor_ptr);
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*/
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.loop:
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st8 [loc0] = r15 // update dtor_ptr (in memory)
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ld8 r17 = [r16], 8 // r17 <- dtor's entry-point
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nop 0
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;;
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ld8 gp = [r16] // gp <- dtor's gp
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mov b6 = r17
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br.call.sptk.many rp = b6
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.entry: ld8 r15 = [loc0] // r15 <- dtor_ptr (gp-relative)
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;;
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add r16 = r15, loc2 // r16 <- dtor_ptr (absolute)
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adds r15 = 8, r15
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;;
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ld8 r16 = [r16] // r16 <- pointer to dtor's fdesc
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mov rp = loc1
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mov ar.pfs = loc3
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;;
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cmp.ne p6, p0 = r0, r16
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(p6) br.cond.sptk.few .loop
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br.ret.sptk.many rp
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.endp __do_global_dtors_aux
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#ifdef SHARED
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.weak __cxa_finalize
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#endif
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.weak _Jv_RegisterClasses
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