/* Definitions of target machine for GNU compiler, for m68k (including m68010) NetBSD platforms using the ELF object format. Copyright (C) 2002-2022 Free Software Foundation, Inc. Contributed by Wasabi Systems. Inc. This file is derived from , , and . This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ #define TARGET_OS_CPP_BUILTINS() \ do \ { \ NETBSD_OS_CPP_BUILTINS_ELF(); \ builtin_define ("__m68k__"); \ builtin_define ("__SVR4_ABI__"); \ builtin_define ("__motorola__"); \ if (TARGET_HARD_FLOAT) \ builtin_define ("__HAVE_FPU__"); \ } \ while (0) /* Don't try using XFmode on the 68010 or coldfire. */ #undef LONG_DOUBLE_TYPE_SIZE #define LONG_DOUBLE_TYPE_SIZE (TARGET_68020 ? 80 : 64) #undef SUBTARGET_OVERRIDE_OPTIONS #define SUBTARGET_OVERRIDE_OPTIONS \ { \ if (TARGET_COLDFIRE) \ { \ target_flags |= MASK_STRICT_ALIGNMENT | MASK_CF_HWDIV; \ if ((target_flags_explicit & MASK_HARD_FLOAT) == 0) \ { \ target_flags &= ~MASK_HARD_FLOAT; \ m68k_fpu = FPUTYPE_NONE; \ } \ } \ } /* Provide a CPP_SPEC appropriate for NetBSD m68k targets. Currently we deal with the GCC option '-posix', as well as an indication as to whether or not use of the FPU is allowed. */ #undef CPP_SPEC #define CPP_SPEC \ "%(netbsd_cpp_spec)" /* Provide an ASM_SPEC appropriate for NetBSD m68k ELF targets. We need to pass PIC code generation options. */ #undef ASM_SPEC #define ASM_SPEC \ "%(asm_cpu_spec) \ %{m68010} %{m68020} %{m68030} %{m68040} %{m68060} \ %{m5200} %{m5206e} %{m528x} %{m5307} %{m5407} %{mcfv4e} \ %{" FPIE1_OR_FPIC1_SPEC ":-k} %{" FPIE2_OR_FPIC2_SPEC ":-k -K}" /* Provide a LINK_SPEC appropriate for a NetBSD/m68k ELF target. */ #undef LINK_SPEC #define LINK_SPEC NETBSD_LINK_SPEC_ELF /* NetBSD/sun2 does not support shlibs, avoid using libgcc_pic. */ #ifndef ENABLE_SHARED_LIBGCC #undef REAL_LIBGCC_SPEC #define REAL_LIBGCC_SPEC "-lgcc" #endif #define NETBSD_ENTRY_POINT "_start" /* Output assembler code to FILE to increment profiler label # LABELNO for profiling a function only. */ #undef FUNCTION_PROFILER #define FUNCTION_PROFILER(FILE, LABELNO) \ do \ { \ if (TARGET_COLDFIRE) \ { \ asm_fprintf (FILE, "\tmovea.l #%LLP%d-.,%Ra1\n", (LABELNO)); \ asm_fprintf (FILE, "\tlea (-6,%Rpc,%Ra1),%Ra1\n"); \ } \ else \ asm_fprintf (FILE, "\tlea (%LLP%d,%Rpc),%Ra1\n", (LABELNO)); \ if (flag_pic) \ fprintf (FILE, "\tbsr.l __mcount@PLTPC\n"); \ else \ fprintf (FILE, "\tjbsr __mcount\n"); \ } \ while (0) /* Make gcc agree with */ #undef SIZE_TYPE #define SIZE_TYPE "unsigned int" #undef PTRDIFF_TYPE #define PTRDIFF_TYPE "int" /* XXX Here is a bunch of stuff lifted from m68kelf.h. We don't use that file directly, because it has a lot of baggage we don't want. */ /* The prefix for register names. Note that REGISTER_NAMES is supposed to include this prefix. Also note that this is NOT an fprintf format string, it is a literal string. */ #undef REGISTER_PREFIX #define REGISTER_PREFIX "%" /* The prefix for local (compiler generated) lables. These labels will not appear in the symbol table. */ #undef LOCAL_LABEL_PREFIX #define LOCAL_LABEL_PREFIX "." /* The prefix to add to user-visible assembler symbols. */ #undef USER_LABEL_PREFIX #define USER_LABEL_PREFIX "" #undef ASM_COMMENT_START #define ASM_COMMENT_START "|" /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to keep switch tables in the text section. */ #undef JUMP_TABLES_IN_TEXT_SECTION #define JUMP_TABLES_IN_TEXT_SECTION 1 /* Use the default action for outputting the case label. */ #undef ASM_OUTPUT_CASE_LABEL #define ASM_RETURN_CASE_JUMP \ do { \ if (TARGET_COLDFIRE) \ { \ if (ADDRESS_REG_P (operands[0])) \ return "jmp %%pc@(2,%0:l)"; \ else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \ return "jmp %%pc@(2,%0:l)"; \ else \ return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ } \ else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \ return "jmp %%pc@(2,%0:l)"; \ else \ return "jmp %%pc@(2,%0:w)"; \ } while (0) /* This is how to output an assembler line that says to advance the location counter to a multiple of 2**LOG bytes. */ #undef ASM_OUTPUT_ALIGN #define ASM_OUTPUT_ALIGN(FILE,LOG) \ do \ { \ if ((LOG) > 0) \ fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \ } \ while (0) /* If defined, a C expression whose value is a string containing the assembler operation to identify the following data as uninitialized global data. */ #define BSS_SECTION_ASM_OP ".section\t.bss" #undef ASM_OUTPUT_ALIGNED_BSS #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) #undef ASM_OUTPUT_COMMON #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ ( fputs (".comm ", (FILE)), \ assemble_name ((FILE), (NAME)), \ fprintf ((FILE), ",%u\n", (int)(SIZE))) #undef ASM_OUTPUT_LOCAL #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ ( fputs (".lcomm ", (FILE)), \ assemble_name ((FILE), (NAME)), \ fprintf ((FILE), ",%u\n", (int)(SIZE))) /* XXX This is the end of the chunk lifted from m68kelf.h */ /* XXX The following chunk is more or less lifted from m68kv4.h. We'd like to just #include that file, but it has not yet been converted to the new include style. Should there be a m68kv4-abi.h ?? */ /* Register in which address to store a structure value is passed to a function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */ #undef M68K_STRUCT_VALUE_REGNUM #define M68K_STRUCT_VALUE_REGNUM A0_REG /* Register in which static-chain is passed to a function. The default isn m68k.h is a0, but that is already the struct value regnum. Make it a1 instead. */ #undef STATIC_CHAIN_REGNUM #define STATIC_CHAIN_REGNUM A1_REG #undef M68K_STATIC_CHAIN_REG_NAME #define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1" /* Now to renumber registers for dbx and gdb. We use the Sun-3 convention, which is: floating point registers have numbers 18 to 25, not 16 to 23 as they do in the compiler. */ #undef DBX_REGISTER_NUMBER #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2) /* 1 if N is a possible register number for a function value. For m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral, pointer, or floating types, respectively. Reject fp0 if not using a 68881 coprocessor. */ #undef FUNCTION_VALUE_REGNO_P #define FUNCTION_VALUE_REGNO_P(N) \ ((N) == D0_REG || (N) == A0_REG || (TARGET_68881 && (N) == FP0_REG)) /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for more than one register. */ #undef NEEDS_UNTYPED_CALL #define NEEDS_UNTYPED_CALL 1 /* Define how to generate (in the callee) the output value of a function and how to find (in the caller) the value returned by a function. VALTYPE is the data type of the value (as a tree). If the precise function being called is known, FUNC is its FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the result in d0, a0, or fp0 as appropriate. */ #undef FUNCTION_VALUE #define FUNCTION_VALUE(VALTYPE, FUNC) \ m68k_function_value (VALTYPE, FUNC) /* Define how to find the value returned by a library function assuming the value has mode MODE. For m68k/SVR4 look for integer values in d0, pointer values in d0 (returned in both d0 and a0), and floating values in fp0. */ #undef LIBCALL_VALUE #define LIBCALL_VALUE(MODE) \ m68k_libcall_value (MODE) /* Boundary (in *bits*) on which stack pointer should be aligned. The m68k/SVR4 convention is to keep the stack pointer longword aligned. */ #undef PREFERRED_STACK_BOUNDARY #define PREFERRED_STACK_BOUNDARY 32 /* Alignment of field after `int : 0' in a structure. For m68k/SVR4, this is the next longword boundary. */ #undef EMPTY_FIELD_BOUNDARY #define EMPTY_FIELD_BOUNDARY 32 /* No data type wants to be aligned rounder than this. For m68k/SVR4, some types (doubles for example) are aligned on 8 byte boundaries */ #undef BIGGEST_ALIGNMENT #define BIGGEST_ALIGNMENT 64 /* The svr4 ABI for the m68k says that records and unions are returned in memory. */ #undef DEFAULT_PCC_STRUCT_RETURN #define DEFAULT_PCC_STRUCT_RETURN 1 /* XXX This is the end of the chunk lifted from m68kv4.h */