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1 /* Definitions for non-Linux based ARM systems using ELF
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2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
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3 Free Software Foundation, Inc.
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4 Contributed by Catherine Moore <clm@cygnus.com>
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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 it
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9 under the terms of the GNU General Public License as published
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10 by the Free Software Foundation; either version 3, or (at your
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11 option) any later version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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16 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 /* elfos.h should have already been included. Now just override
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23 any conflicting definitions and add any extras. */
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24
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25 /* Run-time Target Specification. */
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26 #ifndef TARGET_VERSION
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27 #define TARGET_VERSION fputs (" (ARM/ELF)", stderr);
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28 #endif
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29
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30 /* Default to using software floating point. */
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31 #ifndef TARGET_DEFAULT
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32 #define TARGET_DEFAULT (0)
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33 #endif
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34
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35 /* Now we define the strings used to build the spec file. */
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36 #define UNKNOWN_ELF_STARTFILE_SPEC " crti%O%s crtbegin%O%s crt0%O%s"
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37
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38 #undef STARTFILE_SPEC
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39 #define STARTFILE_SPEC UNKNOWN_ELF_STARTFILE_SPEC
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40
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41 #define UNKNOWN_ELF_ENDFILE_SPEC "crtend%O%s crtn%O%s"
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42
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43 #undef ENDFILE_SPEC
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44 #define ENDFILE_SPEC UNKNOWN_ELF_ENDFILE_SPEC
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45
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46 /* The __USES_INITFINI__ define is tested in newlib/libc/sys/arm/crt0.S
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47 to see if it needs to invoked _init() and _fini(). */
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48 #undef SUBTARGET_CPP_SPEC
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49 #define SUBTARGET_CPP_SPEC "-D__USES_INITFINI__"
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50
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51 #undef PREFERRED_DEBUGGING_TYPE
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52 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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53
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54 /* Return a nonzero value if DECL has a section attribute. */
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55 #define IN_NAMED_SECTION(DECL) \
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56 ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \
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57 && DECL_SECTION_NAME (DECL) != NULL_TREE)
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58
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59 #undef ASM_OUTPUT_ALIGNED_BSS
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60 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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61 do \
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62 { \
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63 if (IN_NAMED_SECTION (DECL)) \
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64 switch_to_section (get_named_section (DECL, NULL, 0)); \
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65 else \
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66 switch_to_section (bss_section); \
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67 \
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68 ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \
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69 \
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70 last_assemble_variable_decl = DECL; \
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71 ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \
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72 ASM_OUTPUT_SKIP (FILE, SIZE ? (int)(SIZE) : 1); \
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73 } \
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74 while (0)
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75
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76 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
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77 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
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78 do \
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79 { \
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80 if ((DECL) != NULL && IN_NAMED_SECTION (DECL)) \
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81 switch_to_section (get_named_section (DECL, NULL, 0)); \
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82 else \
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83 switch_to_section (bss_section); \
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84 \
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85 ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \
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86 ASM_OUTPUT_LABEL (FILE, NAME); \
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87 fprintf (FILE, "\t.space\t%d\n", SIZE ? (int)(SIZE) : 1); \
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88 } \
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89 while (0)
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90
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91 #ifndef SUBTARGET_CPU_DEFAULT
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92 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm7tdmi
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93 #endif
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94
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95 /* The libgcc udivmod functions may throw exceptions. If newlib is
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96 configured to support long longs in I/O, then printf will depend on
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97 udivmoddi4, which will depend on the exception unwind routines,
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98 which will depend on abort, which is defined in libc. */
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99 #undef LINK_GCC_C_SEQUENCE_SPEC
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100 #define LINK_GCC_C_SEQUENCE_SPEC "--start-group %G %L --end-group"
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