gcc/config/sh/linux.h

   1 /* Definitions for SH running Linux-based GNU systems using ELF
   2    Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 /* Run-time Target Specification.  */
  23 #undef TARGET_VERSION
  24 #define TARGET_VERSION  fputs (" (SH GNU/Linux with ELF)", stderr);
  25
  26 /* Enable DWARF 2 exceptions.  */
  27 #undef DWARF2_UNWIND_INFO
  28 #define DWARF2_UNWIND_INFO 1
  29
  30 #undef SUBTARGET_CPP_SPEC
  31 #define SUBTARGET_CPP_SPEC "\
  32    %{posix:-D_POSIX_SOURCE} \
  33    %{pthread:-D_REENTRANT -D_PTHREADS} \
  34 "
  35
  36 #define TARGET_OS_CPP_BUILTINS() \
  37   do                                            \
  38     {                                           \
  39       LINUX_TARGET_OS_CPP_BUILTINS();           \
  40     }                                           \
  41   while (0)
  42
  43 #undef TARGET_DEFAULT
  44 #define TARGET_DEFAULT \
  45   (TARGET_CPU_DEFAULT | MASK_USERMODE | TARGET_ENDIAN_DEFAULT \
  46    | TARGET_OPT_DEFAULT)
  47
  48 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  49
  50 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
  51
  52 #undef SUBTARGET_LINK_EMUL_SUFFIX
  53 #define SUBTARGET_LINK_EMUL_SUFFIX "_linux"
  54 #undef SUBTARGET_LINK_SPEC
  55 #define SUBTARGET_LINK_SPEC \
  56   "%{shared:-shared} \
  57    %{!static: \
  58      %{rdynamic:-export-dynamic} \
  59      %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "}} \
  60    %{static:-static}"
  61
  62 /* Output assembler code to STREAM to call the profiler.  */
  63
  64 #undef FUNCTION_PROFILER
  65 #define FUNCTION_PROFILER(STREAM,LABELNO)                               \
  66   do {                                                                  \
  67     if (TARGET_SHMEDIA)                                                 \
  68       {                                                                 \
  69         fprintf (STREAM, "\tpt\t1f,tr1\n");                             \
  70         fprintf (STREAM, "\taddi.l\tr15,-8,r15\n");                     \
  71         fprintf (STREAM, "\tst.l\tr15,0,r18\n");                        \
  72         if (flag_pic)                                                   \
  73           {                                                             \
  74             const char *gofs = "(datalabel _GLOBAL_OFFSET_TABLE_-(0f-.))"; \
  75             fprintf (STREAM, "\tmovi\t((%s>>16)&0xffff),r21\n", gofs);  \
  76             fprintf (STREAM, "\tshori\t(%s & 0xffff),r21\n", gofs);     \
  77             fprintf (STREAM, "0:\tptrel/u\tr21,tr0\n");                 \
  78             fprintf (STREAM, "\tmovi\t((mcount@GOTPLT)&0xffff),r22\n"); \
  79             fprintf (STREAM, "\tgettr\ttr0,r21\n");                     \
  80             fprintf (STREAM, "\tadd.l\tr21,r22,r21\n");                 \
  81             fprintf (STREAM, "\tld.l\tr21,0,r21\n");                    \
  82             fprintf (STREAM, "\tptabs\tr21,tr0\n");                     \
  83           }                                                             \
  84         else                                                            \
  85           fprintf (STREAM, "\tpt\tmcount,tr0\n");                       \
  86         fprintf (STREAM, "\tgettr\ttr1,r18\n");                         \
  87         fprintf (STREAM, "\tblink\ttr0,r63\n");                         \
  88         fprintf (STREAM, "1:\tld.l\tr15,0,r18\n");                      \
  89         fprintf (STREAM, "\taddi.l\tr15,8,r15\n");                      \
  90       }                                                                 \
  91     else                                                                \
  92       {                                                                 \
  93         if (flag_pic)                                                   \
  94           {                                                             \
  95             fprintf (STREAM, "\tmov.l\t3f,r1\n");                       \
  96             fprintf (STREAM, "\tmova\t3f,r0\n");                        \
  97             fprintf (STREAM, "\tadd\tr1,r0\n");                         \
  98             fprintf (STREAM, "\tmov.l\t1f,r1\n");                       \
  99             fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n");                 \
 100           }                                                             \
 101         else                                                            \
 102           fprintf (STREAM, "\tmov.l\t1f,r1\n");                         \
 103         fprintf (STREAM, "\tsts.l\tpr,@-r15\n");                        \
 104         fprintf (STREAM, "\tmova\t2f,r0\n");                            \
 105         fprintf (STREAM, "\tjmp\t@r1\n");                               \
 106         fprintf (STREAM, "\tlds\tr0,pr\n");                             \
 107         fprintf (STREAM, "\t.align\t2\n");                              \
 108         if (flag_pic)                                                   \
 109           {                                                             \
 110             fprintf (STREAM, "1:\t.long\tmcount@GOT\n");                \
 111             fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n");     \
 112           }                                                             \
 113         else                                                            \
 114           fprintf (STREAM, "1:\t.long\tmcount\n");                      \
 115         fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n");                      \
 116       }                                                                 \
 117   } while (0)
 118
 119 #define MD_UNWIND_SUPPORT "config/sh/linux-unwind.h"
 120
 121 /* For SH3 and SH4, we use a slot of the unwind frame which correspond
 122    to a fake register number 16 as a placeholder for the return address
 123    in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with
 124    _Unwind_GetGR which uses dwarf_reg_size_table to get the size of
 125    the register.  So the entry of dwarf_reg_size_table corresponding to
 126    this slot must be set.  To do this, we redefine DBX_REGISTER_NUMBER
 127    so as to return itself for 16.  */
 128 #undef DBX_REGISTER_NUMBER
 129 #define DBX_REGISTER_NUMBER(REGNO) \
 130   ((! TARGET_SH5 && (REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO))
 131
 132 /* Since libgcc is compiled with -fpic for this target, we can't use
 133    __sdivsi3_1 as the division strategy for -O0 and -Os.  */
 134 #undef SH_DIV_STRATEGY_DEFAULT
 135 #define SH_DIV_STRATEGY_DEFAULT SH_DIV_CALL2
 136 #undef SH_DIV_STR_FOR_SIZE
 137 #define SH_DIV_STR_FOR_SIZE "call2"