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1 /* Copyright (C) 2016-2020 Free Software Foundation, Inc.
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2
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3 This file is free software; you can redistribute it and/or modify it under
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4 the terms of the GNU General Public License as published by the Free
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5 Software Foundation; either version 3 of the License, or (at your option)
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6 any later version.
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7
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8 This file is distributed in the hope that it will be useful, but WITHOUT
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9 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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10 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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11 for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with GCC; see the file COPYING3. If not see
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15 <http://www.gnu.org/licenses/>. */
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16
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17 #ifndef OBJECT_FORMAT_ELF
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18 #error elf.h included before elfos.h
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19 #endif
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20
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21 #define TEXT_SECTION_ASM_OP "\t.section\t.text"
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22 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
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23 #define GLOBAL_ASM_OP "\t.globl\t"
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24 #define DATA_SECTION_ASM_OP "\t.data\t"
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25 #define SET_ASM_OP "\t.set\t"
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26 #define LOCAL_LABEL_PREFIX "."
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27 #define USER_LABEL_PREFIX ""
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28 #define ASM_COMMENT_START ";"
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29 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
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30
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31 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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32 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
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33
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34 #undef ASM_DECLARE_FUNCTION_NAME
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35 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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36 gcn_hsa_declare_function_name ((FILE), (NAME), (DECL))
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37
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38 /* Unlike GNU as, the LLVM assembler uses log2 alignments. */
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39 #undef ASM_OUTPUT_ALIGNED_COMMON
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40 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGNMENT) \
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41 (fprintf ((FILE), "%s", COMMON_ASM_OP), \
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42 assemble_name ((FILE), (NAME)), \
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43 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", \
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44 (SIZE) > 0 ? (SIZE) : 1, exact_log2 ((ALIGNMENT) / BITS_PER_UNIT)))
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45
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46 #define ASM_OUTPUT_LABEL(FILE,NAME) \
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47 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
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48
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49 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
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50 asm_fprintf (FILE, "%U%s", default_strip_name_encoding (NAME))
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51
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52 extern unsigned int gcn_local_sym_hash (const char *name);
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53
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54 #define ASM_OUTPUT_SYMBOL_REF(FILE, X) gcn_asm_output_symbol_ref (FILE, X)
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55
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56 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
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57 fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL)
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58
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59 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
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60 fprintf (FILE, "\t.word .L%d\n", VALUE)
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61
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62 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
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63 do { if (LOG!=0) fprintf (FILE, "\t.align\t%d\n", 1<<(LOG)); } while (0)
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64 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
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65 do { \
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66 if (LOG!=0) \
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67 fprintf (FILE, "\t.p2alignl\t%d, 0xBF800000" \
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68 " ; Fill value is 's_nop 0'\n", (LOG)); \
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69 } while (0)
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70
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71 #define ASM_APP_ON ""
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72 #define ASM_APP_OFF ""
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73
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74 /* Avoid the default in ../../gcc.c, which adds "-pthread", which is not
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75 supported for gcn. */
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76 #define GOMP_SELF_SPECS ""
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77
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78 /* Use LLVM assembler and linker options. */
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79 #define ASM_SPEC "-triple=amdgcn--amdhsa -mattr=-code-object-v3 " \
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80 "%:last_arg(%{march=*:-mcpu=%*}) " \
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81 "-filetype=obj"
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82 /* Add -mlocal-symbol-id=<source-file-basename> unless the user (or mkoffload)
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83 passes the option explicitly on the command line. The option also causes
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84 several dump-matching tests to fail in the testsuite, so the option is not
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85 added when or tree dump/compare-debug options used in the testsuite are
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86 present.
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87 This has the potential for surprise, but a user can still use an explicit
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88 -mlocal-symbol-id=<whatever> option manually together with -fdump-tree or
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89 -fcompare-debug options. */
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90 #define CC1_SPEC "%{!mlocal-symbol-id=*:%{!fdump-tree-*:" \
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91 "%{!fdump-ipa-*:%{!fcompare-debug*:-mlocal-symbol-id=%b}}}}"
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92 #define LINK_SPEC "--pie"
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93 #define LIB_SPEC "-lc"
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94
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95 /* Provides a _start symbol to keep the linker happy. */
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96 #define STARTFILE_SPEC "crt0.o%s"
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97 #define ENDFILE_SPEC ""
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98 #define STANDARD_STARTFILE_PREFIX_2 ""
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99
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100 /* The LLVM assembler rejects multiple -mcpu options, so we must drop
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101 all but the last. */
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102 extern const char *last_arg_spec_function (int argc, const char **argv);
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103 #define EXTRA_SPEC_FUNCTIONS \
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104 { "last_arg", last_arg_spec_function },
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105
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106 #undef LOCAL_INCLUDE_DIR
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107
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108 /* FIXME: Review debug info settings.
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109 * In particular, EH_FRAME_THROUGH_COLLECT2 is probably the wrong
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110 * thing but stuff fails to build without it.
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111 * (Debug info is not a big deal until we get a debugger.) */
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112 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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113 #define DWARF2_DEBUGGING_INFO 1
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114 #define DWARF2_ASM_LINE_DEBUG_INFO 1
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115 #define EH_FRAME_THROUGH_COLLECT2 1
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