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