1 /* Definitions for SH running Linux-based GNU systems using ELF 2 Copyright (C) 1999-2013 Free Software Foundation, Inc. 3 Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 /* Run-time Target Specification. */ 22 23 /* Enable DWARF 2 exceptions. */ 24 #undef DWARF2_UNWIND_INFO 25 #define DWARF2_UNWIND_INFO 1 26 27 #undef SUBTARGET_CPP_SPEC 28 #define SUBTARGET_CPP_SPEC "\ 29 %{posix:-D_POSIX_SOURCE} \ 30 %{pthread:-D_REENTRANT -D_PTHREADS} \ 31 " 32 33 #define TARGET_OS_CPP_BUILTINS() \ 34 do \ 35 { \ 36 GNU_USER_TARGET_OS_CPP_BUILTINS(); \ 37 } \ 38 while (0) 39 40 #undef TARGET_DEFAULT 41 #define TARGET_DEFAULT \ 42 (TARGET_CPU_DEFAULT | TARGET_ENDIAN_DEFAULT | TARGET_OPT_DEFAULT) 43 44 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack 45 46 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" 47 48 #undef SUBTARGET_LINK_EMUL_SUFFIX 49 #define SUBTARGET_LINK_EMUL_SUFFIX "_linux" 50 #undef SUBTARGET_LINK_SPEC 51 #define SUBTARGET_LINK_SPEC \ 52 "%{shared:-shared} \ 53 %{!static: \ 54 %{rdynamic:-export-dynamic} \ 55 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \ 56 %{static:-static}" 57 58 /* Output assembler code to STREAM to call the profiler. */ 59 #undef FUNCTION_PROFILER 60 #define FUNCTION_PROFILER(STREAM,LABELNO) \ 61 do { \ 62 if (TARGET_SHMEDIA) \ 63 { \ 64 fprintf (STREAM, "\tpt\t1f,tr1\n"); \ 65 fprintf (STREAM, "\taddi.l\tr15,-8,r15\n"); \ 66 fprintf (STREAM, "\tst.l\tr15,0,r18\n"); \ 67 if (flag_pic) \ 68 { \ 69 const char *gofs = "(datalabel _GLOBAL_OFFSET_TABLE_-(0f-.))"; \ 70 fprintf (STREAM, "\tmovi\t((%s>>16)&0xffff),r21\n", gofs); \ 71 fprintf (STREAM, "\tshori\t(%s & 0xffff),r21\n", gofs); \ 72 fprintf (STREAM, "0:\tptrel/u\tr21,tr0\n"); \ 73 fprintf (STREAM, "\tmovi\t((mcount@GOTPLT)&0xffff),r22\n"); \ 74 fprintf (STREAM, "\tgettr\ttr0,r21\n"); \ 75 fprintf (STREAM, "\tadd.l\tr21,r22,r21\n"); \ 76 fprintf (STREAM, "\tld.l\tr21,0,r21\n"); \ 77 fprintf (STREAM, "\tptabs\tr21,tr0\n"); \ 78 } \ 79 else \ 80 fprintf (STREAM, "\tpt\tmcount,tr0\n"); \ 81 fprintf (STREAM, "\tgettr\ttr1,r18\n"); \ 82 fprintf (STREAM, "\tblink\ttr0,r63\n"); \ 83 fprintf (STREAM, "1:\tld.l\tr15,0,r18\n"); \ 84 fprintf (STREAM, "\taddi.l\tr15,8,r15\n"); \ 85 } \ 86 else \ 87 { \ 88 if (flag_pic) \ 89 { \ 90 fprintf (STREAM, "\tmov.l\t3f,r1\n"); \ 91 fprintf (STREAM, "\tmova\t3f,r0\n"); \ 92 fprintf (STREAM, "\tadd\tr1,r0\n"); \ 93 fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ 94 fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n"); \ 95 } \ 96 else \ 97 fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ 98 fprintf (STREAM, "\tsts.l\tpr,@-r15\n"); \ 99 fprintf (STREAM, "\tmova\t2f,r0\n"); \ 100 fprintf (STREAM, "\tjmp\t@r1\n"); \ 101 fprintf (STREAM, "\tlds\tr0,pr\n"); \ 102 fprintf (STREAM, "\t.align\t2\n"); \ 103 if (flag_pic) \ 104 { \ 105 fprintf (STREAM, "1:\t.long\tmcount@GOT\n"); \ 106 fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n"); \ 107 } \ 108 else \ 109 fprintf (STREAM, "1:\t.long\tmcount\n"); \ 110 fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n"); \ 111 } \ 112 } while (0) 113 114 /* For SH3 and SH4, we use a slot of the unwind frame which correspond 115 to a fake register number 16 as a placeholder for the return address 116 in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with 117 _Unwind_GetGR which uses dwarf_reg_size_table to get the size of 118 the register. So the entry of dwarf_reg_size_table corresponding to 119 this slot must be set. To do this, we redefine DBX_REGISTER_NUMBER 120 so as to return itself for 16. */ 121 #undef DBX_REGISTER_NUMBER 122 #define DBX_REGISTER_NUMBER(REGNO) \ 123 ((! TARGET_SH5 && (REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO)) 124 125 /* Since libgcc is compiled with -fpic for this target, we can't use 126 __sdivsi3_1 as the division strategy for -O0 and -Os. */ 127 #undef SH_DIV_STRATEGY_DEFAULT 128 #define SH_DIV_STRATEGY_DEFAULT SH_DIV_CALL2 129 #undef SH_DIV_STR_FOR_SIZE 130 #define SH_DIV_STR_FOR_SIZE "call2" 131 132 /* Install the __sync libcalls. */ 133 #undef TARGET_INIT_LIBFUNCS 134 #define TARGET_INIT_LIBFUNCS sh_init_sync_libfuncs 135 136 #undef SUBTARGET_OVERRIDE_OPTIONS 137 #define SUBTARGET_OVERRIDE_OPTIONS \ 138 do \ 139 { \ 140 /* Set default atomic model if it hasn't been specified. */ \ 141 if (global_options_set.x_sh_atomic_model_str == 0) \ 142 { \ 143 if (TARGET_SH3) \ 144 sh_atomic_model_str = "soft-gusa"; \ 145 else if (TARGET_SH1) \ 146 sh_atomic_model_str = "soft-imask"; \ 147 } \ 148 /* Set -musermode if it hasn't been specified. */ \ 149 if (global_options_set.x_TARGET_USERMODE == 0) \ 150 TARGET_USERMODE = true; \ 151 } \ 152 while (0) 153