1  /* IA32 VxWorks target definitions for GNU compiler.
       2     Copyright (C) 2003-2023 Free Software Foundation, Inc.
       3     Updated by CodeSourcery, LLC.
       4  
       5  This file is part of GCC.
       6  
       7  GCC is free software; you can redistribute it and/or modify
       8  it under the terms of the GNU General Public License as published by
       9  the Free Software Foundation; either version 3, or (at your option)
      10  any later version.
      11  
      12  GCC is distributed in the hope that it will be useful,
      13  but WITHOUT ANY WARRANTY; without even the implied warranty of
      14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15  GNU General Public 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  /* VxWorks after 7 SR0600 use the ELF ABI and the system environment is llvm
      22     based.  Earlier versions have GNU based environment components and use the
      23     same ABI as Solaris 2.  */
      24  
      25  #if TARGET_VXWORKS7
      26  
      27  #undef VXWORKS_PERSONALITY
      28  #define VXWORKS_PERSONALITY "llvm"
      29  
      30  #else
      31  
      32  #undef ASM_OUTPUT_ALIGNED_BSS
      33  #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
      34    asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
      35  
      36  #undef TARGET_SUBTARGET_DEFAULT
      37  #define TARGET_SUBTARGET_DEFAULT \
      38  	(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_VECT8_RETURNS)
      39  
      40  #undef PTRDIFF_TYPE
      41  #define PTRDIFF_TYPE (TARGET_LP64 ? "long int" : "int")
      42  
      43  #undef SIZE_TYPE
      44  #define SIZE_TYPE (TARGET_LP64 ? "long unsigned int" : "unsigned int")
      45  
      46  /* We cannot use PC-relative accesses for VxWorks PIC because there is no
      47     fixed gap between segments.  */
      48  #undef ASM_PREFERRED_EH_DATA_FORMAT
      49  
      50  #if TARGET_64BIT_DEFAULT
      51  #undef VXWORKS_SYSCALL_LIBS_RTP
      52  #define VXWORKS_SYSCALL_LIBS_RTP "-lsyscall"
      53  #endif
      54  
      55  #endif
      56  
      57  /* Provide our target specific DEBUGGER_REGNO.  VxWorks relies on
      58     the SVR4 numbering.  */
      59  
      60  #undef DEBUGGER_REGNO
      61  #define DEBUGGER_REGNO(n) \
      62    (TARGET_64BIT ? debugger64_register_map[n] : svr4_debugger_register_map[n])
      63  
      64  /* CPU macro definitions, ordered to account for VxWorks 7 not
      65     supporting CPUs older than PENTIUM4 since SR0650.  */
      66  
      67  #define VX_CPUDEF(CPU) builtin_define(VX_CPU_PREFIX "CPU=" #CPU)
      68  #define VX_CPUVDEF(CPU) builtin_define(VX_CPU_PREFIX "CPU_VARIANT=" #CPU)
      69  
      70  #define TARGET_OS_CPP_BUILTINS()			\
      71    do							\
      72      {							\
      73        VXWORKS_OS_CPP_BUILTINS ();			\
      74        if (TARGET_64BIT)					\
      75  	VX_CPUDEF (X86_64);				\
      76        else if (TARGET_CPU_P (PENTIUM4))			\
      77  	{						\
      78  	  VX_CPUDEF (PENTIUM4);				\
      79  	  VX_CPUVDEF (PENTIUM4);			\
      80  	}						\
      81        else if (TARGET_CPU_P (CORE2))			\
      82  	VX_CPUDEF (CORE2);				\
      83        else if (TARGET_CPU_P (NEHALEM))			\
      84  	VX_CPUDEF (NEHALEM);				\
      85        else if (TARGET_CPU_P (SANDYBRIDGE))		\
      86  	VX_CPUDEF (SANDYBRIDGE);			\
      87        else if (TARGET_CPU_P (HASWELL))			\
      88  	VX_CPUDEF (HASWELL);				\
      89        else if (TARGET_CPU_P (SILVERMONT))		\
      90  	VX_CPUDEF (SILVERMONT);				\
      91        else if (TARGET_CPU_P (SKYLAKE) || TARGET_CPU_P (SKYLAKE_AVX512)) \
      92  	VX_CPUDEF (SKYLAKE);				\
      93        else if (TARGET_CPU_P (GOLDMONT))			\
      94  	VX_CPUDEF (GOLDMONT);				\
      95        else if (TARGET_VXWORKS7)				\
      96  	VX_CPUDEF (PENTIUM4);				\
      97        else if (TARGET_CPU_P (I386))			\
      98  	VX_CPUDEF (I80386);				\
      99        else if (TARGET_CPU_P (I486))			\
     100  	VX_CPUDEF (I80486);				\
     101        else if (TARGET_CPU_P (PENTIUM))			\
     102  	{						\
     103  	  VX_CPUDEF (PENTIUM);				\
     104  	  VX_CPUVDEF (PENTIUM);				\
     105  	}						\
     106        else if (TARGET_CPU_P (PENTIUMPRO))		\
     107  	{						\
     108  	  VX_CPUDEF (PENTIUM2);				\
     109  	  VX_CPUVDEF (PENTIUMPRO);			\
     110  	}						\
     111        else						\
     112  	VX_CPUDEF (I80386);				\
     113      }							\
     114    while (0)
     115  
     116  #undef  CPP_SPEC
     117  #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
     118  #undef  CC1_SPEC
     119  #define CC1_SPEC VXWORKS_CC1_SPEC
     120  #undef  LIB_SPEC
     121  #define LIB_SPEC VXWORKS_LIB_SPEC
     122  #undef  STARTFILE_SPEC
     123  #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
     124  #undef  ENDFILE_SPEC
     125  #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
     126  #undef  LINK_SPEC
     127  #define LINK_SPEC VXWORKS_LINK_SPEC
     128  
     129  #undef  SUBTARGET_SWITCHES
     130  #define SUBTARGET_SWITCHES EXTRA_SUBTARGET_SWITCHES
     131  
     132  #undef SUBTARGET_OVERRIDE_OPTIONS
     133  #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
     134  
     135  /* No _mcount profiling on VxWorks.  */
     136  #undef FUNCTION_PROFILER
     137  #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
     138  
     139  /* Define this to be nonzero if static stack checking is supported.  */
     140  #define STACK_CHECK_STATIC_BUILTIN 1
     141  
     142  /* This platform supports the probing method of stack checking (RTP mode).
     143     8K is reserved in the stack to propagate exceptions in case of overflow.
     144     On 64-bit targets, we double that size.  */
     145  
     146  #define STACK_CHECK_PROTECT (TARGET_64BIT_DEFAULT ? 16 * 1024 : 8 * 1024)