1  /* Copyright (C) 2016-2023 Free Software Foundation, Inc.
       2  
       3     This file is free software; you can redistribute it and/or modify it under
       4     the terms of the GNU General Public License as published by the Free
       5     Software Foundation; either version 3 of the License, or (at your option)
       6     any later version.
       7  
       8     This file is distributed in the hope that it will be useful, but WITHOUT
       9     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      10     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      11     for more details.
      12  
      13     You should have received a copy of the GNU General Public License
      14     along with GCC; see the file COPYING3.  If not see
      15     <http://www.gnu.org/licenses/>.  */
      16  
      17  #ifndef OBJECT_FORMAT_ELF
      18   #error elf.h included before elfos.h
      19  #endif
      20  
      21  #define TEXT_SECTION_ASM_OP "\t.text"
      22  #define BSS_SECTION_ASM_OP  "\t.bss"
      23  #define GLOBAL_ASM_OP       "\t.globl\t"
      24  #define DATA_SECTION_ASM_OP "\t.data\t"
      25  #define SET_ASM_OP          "\t.set\t"
      26  #define LOCAL_LABEL_PREFIX  "."
      27  #define USER_LABEL_PREFIX   ""
      28  #define ASM_COMMENT_START   ";"
      29  #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
      30  
      31  #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
      32  	    asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
      33  
      34  #undef ASM_DECLARE_FUNCTION_NAME
      35  #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
      36    gcn_hsa_declare_function_name ((FILE), (NAME), (DECL))
      37  
      38  /* Unlike GNU as, the LLVM assembler uses log2 alignments.  */
      39  #undef ASM_OUTPUT_ALIGNED_COMMON
      40  #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGNMENT)	  \
      41   (fprintf ((FILE), "%s", COMMON_ASM_OP),			  \
      42    assemble_name ((FILE), (NAME)),				  \
      43    fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n",	  \
      44  	   (SIZE) > 0 ? (SIZE) : 1, exact_log2 ((ALIGNMENT) / BITS_PER_UNIT)))
      45  
      46  #define ASM_OUTPUT_LABEL(FILE,NAME) \
      47    do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
      48  
      49  #define ASM_OUTPUT_LABELREF(FILE, NAME) \
      50    asm_fprintf (FILE, "%U%s", default_strip_name_encoding (NAME))
      51  
      52  extern unsigned int gcn_local_sym_hash (const char *name);
      53  
      54  #define ASM_OUTPUT_SYMBOL_REF(FILE, X) gcn_asm_output_symbol_ref (FILE, X)
      55  
      56  #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
      57    fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL)
      58  
      59  #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
      60    fprintf (FILE, "\t.word .L%d\n", VALUE)
      61  
      62  #define ASM_OUTPUT_ALIGN(FILE,LOG) \
      63    do { if (LOG!=0) fprintf (FILE, "\t.align\t%d\n", 1<<(LOG)); } while (0)
      64  #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG)	       \
      65    do {						       \
      66      if (LOG!=0)					       \
      67        fprintf (FILE, "\t.p2alignl\t%d, 0xBF800000"     \
      68  	       " ; Fill value is 's_nop 0'\n", (LOG)); \
      69    } while (0)
      70  
      71  #define ASM_APP_ON  ""
      72  #define ASM_APP_OFF ""
      73  
      74  /* Avoid the default in ../../gcc.cc, which adds "-pthread", which is not
      75     supported for gcn.  */
      76  #define GOMP_SELF_SPECS ""
      77  
      78  #define NO_XNACK "!march=*:;march=fiji:;"
      79  #define NO_SRAM_ECC "!march=*:;march=fiji:;march=gfx900:;march=gfx906:;"
      80  
      81  /* In HSACOv4 no attribute setting means the binary supports "any" hardware
      82     configuration.  The name of the attribute also changed.  */
      83  #define SRAMOPT "msram-ecc=on:-mattr=+sramecc;msram-ecc=off:-mattr=-sramecc"
      84  
      85  /* Use LLVM assembler and linker options.  */
      86  #define ASM_SPEC  "-triple=amdgcn--amdhsa "  \
      87  		  "%:last_arg(%{march=*:-mcpu=%*}) " \
      88  		  "%{!march=*|march=fiji:--amdhsa-code-object-version=3} " \
      89  		  "%{" NO_XNACK "mxnack:-mattr=+xnack;:-mattr=-xnack} " \
      90  		  "%{" NO_SRAM_ECC SRAMOPT "} " \
      91  		  "-filetype=obj"
      92  #define LINK_SPEC "--pie --export-dynamic"
      93  #define LIB_SPEC  "-lc"
      94  
      95  /* Provides a _start symbol to keep the linker happy.  */
      96  #define STARTFILE_SPEC "crt0.o%s"
      97  #define ENDFILE_SPEC   ""
      98  #define STANDARD_STARTFILE_PREFIX_2 ""
      99  
     100  /* The LLVM assembler rejects multiple -mcpu options, so we must drop
     101     all but the last.  */
     102  extern const char *last_arg_spec_function (int argc, const char **argv);
     103  #define EXTRA_SPEC_FUNCTIONS	\
     104      { "last_arg", last_arg_spec_function },
     105  
     106  #undef LOCAL_INCLUDE_DIR
     107  
     108  /* FIXME: Review debug info settings.
     109   *        In particular, EH_FRAME_THROUGH_COLLECT2 is probably the wrong
     110   *        thing but stuff fails to build without it.
     111   *        (Debug info is not a big deal until we get a debugger.)  */
     112  #define PREFERRED_DEBUGGING_TYPE   DWARF2_DEBUG
     113  #define DWARF2_DEBUGGING_INFO      1
     114  #define DWARF2_ASM_LINE_DEBUG_INFO 1
     115  #define EH_FRAME_THROUGH_COLLECT2  1
     116  #define DEBUGGER_REGNO(REGNO) gcn_dwarf_register_number (REGNO)