libgcc/config/sh/crti.S

   1 /* Copyright (C) 2000-2020 Free Software Foundation, Inc.
   2    This file was adapted from glibc sources.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 3, or (at your option) any
   9 later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #include "crt.h"
  26
  27 /* The code in sections .init and .fini is supposed to be a single
  28    regular function.  The function in .init is called directly from
  29    start in crt1.S.  The function in .fini is atexit()ed in crt1.S
  30    too.
  31
  32    crti.S contributes the prologue of a function to these sections,
  33    and crtn.S comes up the epilogue.  STARTFILE_SPEC should list
  34    crti.o before any other object files that might add code to .init
  35    or .fini sections, and ENDFILE_SPEC should list crtn.o after any
  36    such object files.  */
  37
  38         .section .init
  39 /* The alignment below can't be smaller, otherwise the mova below
  40    breaks.  Yes, we might align just the label, but then we'd be
  41    exchanging an alignment here for one there, since the code fragment
  42    below ensures 4-byte alignment on __ELF__.  */
  43 #ifdef __ELF__
  44         .p2align 2
  45 #else
  46         .p2align 1
  47 #endif
  48         .global  GLOBAL(_init)
  49 GLOBAL(_init):
  50 #ifdef __ELF__
  51         mov.l   r12,@-r15
  52         mova    0f,r0
  53         mov.l   0f,r12
  54 #endif
  55         mov.l   r14,@-r15
  56 #ifdef __ELF__
  57         add     r0,r12
  58 #endif
  59         sts.l   pr,@-r15
  60 #ifdef __ELF__
  61         bra     1f
  62 #endif
  63         mov     r15,r14
  64 #ifdef __ELF__
  65 0:      .long   _GLOBAL_OFFSET_TABLE_
  66 1:
  67 #endif
  68
  69         .section .fini
  70 /* The alignment below can't be smaller, otherwise the mova below
  71    breaks.  Yes, we might align just the label, but then we'd be
  72    exchanging an alignment here for one there, since the code fragment
  73    below ensures 4-byte alignment on __ELF__.  */
  74 #ifdef __ELF__
  75         .p2align 2
  76 #else
  77         .p2align 1
  78 #endif
  79         .global  GLOBAL(_fini)
  80 GLOBAL(_fini):
  81 #ifdef __ELF__
  82         mov.l   r12,@-r15
  83         mova    0f,r0
  84         mov.l   0f,r12
  85 #endif
  86         mov.l   r14,@-r15
  87 #ifdef __ELF__
  88         add     r0,r12
  89 #endif
  90         sts.l   pr,@-r15
  91 #ifdef __ELF__
  92         bra     1f
  93 #endif
  94         mov     r15,r14
  95 #ifdef __ELF__
  96 0:      .long   _GLOBAL_OFFSET_TABLE_
  97 1:
  98 #endif