gcc/config/pa/pa32-linux.h

   1 /* Definitions for PA_RISC with ELF-32 format
   2    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any 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
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* Turn off various SOM crap we don't want.  */
  21 #undef TARGET_ELF32
  22 #define TARGET_ELF32 1
  23
  24 /* The libcall __canonicalize_funcptr_for_compare is referenced in
  25    crtend.o and the reference isn't resolved in objects that don't
  26    compare function pointers.  Thus, we need to play games to provide
  27    a reference in crtbegin.o.  The rest of the define is the same
  28    as that in crtstuff.c  */
  29 #define CTOR_LIST_BEGIN \
  30   asm (".type __canonicalize_funcptr_for_compare,@function\n"           \
  31 "       .text\n"                                                        \
  32 "       .word __canonicalize_funcptr_for_compare-$PIC_pcrel$0");        \
  33   STATIC func_ptr __CTOR_LIST__[1]                                      \
  34     __attribute__ ((__used__, section(".ctors"),                        \
  35                     aligned(sizeof(func_ptr))))                         \
  36     = { (func_ptr) (-1) }
  37
  38 /* This is a PIC version of CRT_CALL_STATIC_FUNCTION.  The PIC
  39    register has to be saved before the call and restored after
  40    the call.  We assume that register %r4 is available for this
  41    purpose.  The hack prevents GCC from deleting the restore.  */
  42 #ifdef CRTSTUFFS_O
  43 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)      \
  44 static void __attribute__((__used__))                   \
  45 call_ ## FUNC (void)                                    \
  46 {                                                       \
  47   asm (SECTION_OP);                                     \
  48   asm volatile ("bl " #FUNC ",%%r2\n\t"                 \
  49                 "copy %%r19,%%r4\n\t"                   \
  50                 "copy %%r4,%%r19\n"                     \
  51                 :                                       \
  52                 :                                       \
  53                 : "r1", "r2", "r4", "r20", "r21",       \
  54                   "r22", "r23", "r24", "r25", "r26",    \
  55                   "r27", "r28", "r29", "r31");          \
  56   asm (TEXT_SECTION_ASM_OP);                            \
  57 }
  58 #endif
  59
  60 #undef  WCHAR_TYPE
  61 #define WCHAR_TYPE "long int"
  62
  63 #undef  WCHAR_TYPE_SIZE
  64 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  65
  66 /* POSIX types such as pthread_mutex_t require 16-byte alignment to retain
  67    layout compatibility with the original linux thread implementation.  */
  68 #undef MALLOC_ABI_ALIGNMENT
  69 #define MALLOC_ABI_ALIGNMENT 128