1/* Definitions for non-Linux based ARM systems using ELF 2 Copyright (C) 1998-2020 Free Software Foundation, Inc. 3 Contributed by Catherine Moore <clm@cygnus.com> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 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/* elfos.h should have already been included. Now just override 22 any conflicting definitions and add any extras. */ 23 24/* Run-time Target Specification. */ 25 26/* Default to using software floating point. */ 27#ifndef TARGET_DEFAULT 28#define TARGET_DEFAULT (0) 29#endif 30 31/* Now we define the strings used to build the spec file. */ 32#define UNKNOWN_ELF_STARTFILE_SPEC " crti%O%s crtbegin%O%s crt0%O%s" 33 34#undef STARTFILE_SPEC 35#define STARTFILE_SPEC \ 36 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \ 37 UNKNOWN_ELF_STARTFILE_SPEC 38 39#define UNKNOWN_ELF_ENDFILE_SPEC "crtend%O%s crtn%O%s" 40 41#undef ENDFILE_SPEC 42#define ENDFILE_SPEC UNKNOWN_ELF_ENDFILE_SPEC 43 44/* The __USES_INITFINI__ define is tested in newlib/libc/sys/arm/crt0.S 45 to see if it needs to invoked _init() and _fini(). */ 46#undef SUBTARGET_CPP_SPEC 47#define SUBTARGET_CPP_SPEC "-D__USES_INITFINI__" 48 49#undef PREFERRED_DEBUGGING_TYPE 50#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 51 52/* Return a nonzero value if DECL has a section attribute. */ 53#define IN_NAMED_SECTION_P(DECL) \ 54 ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \ 55 && DECL_SECTION_NAME (DECL) != NULL) 56 57#undef ASM_OUTPUT_ALIGNED_BSS 58#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 59 do \ 60 { \ 61 if (IN_NAMED_SECTION_P (DECL)) \ 62 switch_to_section (get_named_section (DECL, NULL, 0)); \ 63 else \ 64 switch_to_section (bss_section); \ 65 \ 66 ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \ 67 \ 68 last_assemble_variable_decl = DECL; \ 69 ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \ 70 ASM_OUTPUT_SKIP (FILE, SIZE ? (int)(SIZE) : 1); \ 71 } \ 72 while (0) 73 74#undef ASM_OUTPUT_ALIGNED_DECL_LOCAL 75#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ 76 do \ 77 { \ 78 if ((DECL) != NULL && IN_NAMED_SECTION_P (DECL)) \ 79 switch_to_section (get_named_section (DECL, NULL, 0)); \ 80 else \ 81 switch_to_section (bss_section); \ 82 \ 83 ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \ 84 ASM_OUTPUT_LABEL (FILE, NAME); \ 85 fprintf (FILE, "\t.space\t%d\n", SIZE ? (int) SIZE : 1); \ 86 fprintf (FILE, "\t.size\t%s, %d\n", \ 87 NAME, SIZE ? (int) SIZE : 1); \ 88 } \ 89 while (0) 90 91/* The libgcc udivmod functions may throw exceptions. If newlib is 92 configured to support long longs in I/O, then printf will depend on 93 udivmoddi4, which will depend on the exception unwind routines, 94 which will depend on abort, which is defined in libc. */ 95#undef LINK_GCC_C_SEQUENCE_SPEC 96#define LINK_GCC_C_SEQUENCE_SPEC "--start-group %G %{!nolibc:%L} --end-group" 97