| /* Definitions of target machine for GNU compiler. Vxworks PowerPC version. |
| Copyright (C) 1996-2022 Free Software Foundation, Inc. |
| Contributed by CodeSourcery, LLC. |
| |
| 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* The port comes in two very different flavors at this stage: |
| |
| - For 653 (AE) and regular versions prior to VxWorks 7, the port |
| comes with its own set of definitions, matching a system compiler |
| configured this way as well as the corresponding run-time |
| environment. This is essentially an eabi system, so changes to |
| eabi.h should usually be reflected here. |
| |
| - Starting with VxWorks 7 (post SR600), the system environment |
| was made extremely similar to GNU/Linux and this toolchain is |
| built on top of the corresponding header files. */ |
| |
| /*-------------------------------------------------------------*/ |
| /* Common definitions first. */ |
| /*-------------------------------------------------------------*/ |
| |
| /* CPP predefined macros. */ |
| |
| #undef TARGET_OS_CPP_BUILTINS |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__ELF__"); \ |
| if (!TARGET_VXWORKS7) \ |
| builtin_define ("__EABI__"); \ |
| \ |
| /* CPU macros, based on what the system compilers do. */ \ |
| if (!TARGET_VXWORKS7) \ |
| { \ |
| builtin_define ("__ppc"); \ |
| /* Namespace violation below, but the system headers \ |
| really depend heavily on this. */ \ |
| builtin_define ("CPU_FAMILY=PPC"); \ |
| \ |
| /* __PPC__ isn't actually emitted by the system compiler \ |
| prior to vx7 but has been advertised by us for ages. */ \ |
| builtin_define ("__PPC__"); \ |
| } \ |
| else \ |
| { \ |
| builtin_define ("__PPC__"); \ |
| builtin_define ("__powerpc__"); \ |
| if (TARGET_64BIT) \ |
| { \ |
| builtin_define ("__PPC64__"); \ |
| builtin_define ("__powerpc64__"); \ |
| } \ |
| else \ |
| { \ |
| builtin_define ("__PPC"); \ |
| builtin_define ("__powerpc"); \ |
| } \ |
| \ |
| /* __ppc isn't emitted by the system compiler \ |
| any more but a few system headers still depend \ |
| on it, as well as on __ppc__. */ \ |
| builtin_define ("__ppc"); \ |
| builtin_define ("__ppc__"); \ |
| } \ |
| \ |
| /* Asserts for #cpu and #machine. */ \ |
| if (TARGET_64BIT) \ |
| { \ |
| builtin_assert ("cpu=powerpc64"); \ |
| builtin_assert ("machine=powerpc64"); \ |
| } \ |
| else \ |
| { \ |
| builtin_assert ("cpu=powerpc"); \ |
| builtin_assert ("machine=powerpc"); \ |
| } \ |
| \ |
| /* PowerPC VxWorks specificities. */ \ |
| if (!TARGET_SOFT_FLOAT) \ |
| { \ |
| builtin_define ("__hardfp"); \ |
| builtin_define ("_WRS_HARDWARE_FP"); \ |
| } \ |
| \ |
| /* Common VxWorks and port items. */ \ |
| VXWORKS_OS_CPP_BUILTINS (); \ |
| TARGET_OS_SYSV_CPP_BUILTINS (); \ |
| } \ |
| while (0) |
| |
| |
| #define VX_CPUDEF(CPUID) \ |
| ":-D" VX_CPU_PREFIX "CPU=" VX_CPU_PREFIX #CPUID |
| |
| #define VX_MCPU(CPU,CPUID) \ |
| "mcpu=" #CPU VX_CPUDEF(CPUID) |
| |
| #undef CPP_SPEC |
| #define CPP_SPEC \ |
| "%{!D" VX_CPU_PREFIX "CPU=*:%{" \ |
| VX_MCPU(403, PPC403) ";" \ |
| VX_MCPU(405, PPC405) ";" \ |
| VX_MCPU(440, PPC440) ";" \ |
| VX_MCPU(464, PPC464) ";" \ |
| VX_MCPU(476, PPC476) ";" \ |
| VX_MCPU(603, PPC603) ";" \ |
| VX_MCPU(604, PPC604) ";" \ |
| VX_MCPU(860, PPC860) ";" \ |
| VX_MCPU(e6500, PPCE6500) ";" \ |
| VX_MCPU(8540, PPC85XX) ";" \ |
| VX_MCPU(8548, PPC85XX) ";" \ |
| VX_CPUDEF(PPC604) \ |
| "}}" \ |
| VXWORKS_ADDITIONAL_CPP_SPEC |
| |
| /* FIXME: The only reason we allow no -mcpu switch at all is because |
| config-ml.in insists on a "." multilib. */ |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC VXWORKS_LIB_SPEC |
| |
| #undef STARTFILE_SPEC |
| #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC |
| |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC |
| |
| /* There is no default multilib. */ |
| #undef MULTILIB_DEFAULTS |
| |
| /* No _mcount profiling on VxWorks. */ |
| #undef FUNCTION_PROFILER |
| #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO) |
| |
| /* Nor sdata, for kernel mode. We use this in |
| SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized. */ |
| #undef SDATA_DEFAULT_SIZE |
| #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0) |
| |
| #undef SUB3TARGET_OVERRIDE_OPTIONS |
| #define SUB3TARGET_OVERRIDE_OPTIONS \ |
| do { \ |
| if (!OPTION_SET_P (g_switch_value)) \ |
| g_switch_value = SDATA_DEFAULT_SIZE; \ |
| VXWORKS_OVERRIDE_OPTIONS; \ |
| } while (0) |
| |
| /* The stack pointer need not be moved while checking the stack. */ |
| #undef STACK_CHECK_MOVING_SP |
| |
| /* Define this to be nonzero if static stack checking is supported. */ |
| #define STACK_CHECK_STATIC_BUILTIN 1 |
| |
| /* Room needed to allow exception propagation, from what experiments |
| and low level observations taught us ... */ |
| #define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024) |
| |
| /* Leverage linker relaxation for RTPs. This helps 32bit programs |
| referring to kernel services too far away for short calls, is more |
| precise than -mlongcall and can be overriden with -Wl,--no-relax. */ |
| #define VXWORKS_RELAX_LINK_SPEC "%{mrtp:--relax}" |
| |
| /*-------------------------------------------------------------*/ |
| /* Pre-VxWorks7 configuration. */ |
| /*-------------------------------------------------------------*/ |
| |
| #if !TARGET_VXWORKS7 |
| |
| #undef RS6000_STARTING_FRAME_OFFSET |
| #define RS6000_STARTING_FRAME_OFFSET \ |
| (cfun->calls_alloca \ |
| ? RS6000_ALIGN (crtl->outgoing_args_size + RS6000_SAVE_AREA, 16) \ |
| : (RS6000_ALIGN (crtl->outgoing_args_size, 16) + RS6000_SAVE_AREA)) |
| |
| #undef STACK_DYNAMIC_OFFSET |
| #define STACK_DYNAMIC_OFFSET(FUNDECL) \ |
| RS6000_ALIGN (crtl->outgoing_args_size.to_constant () \ |
| + STACK_POINTER_OFFSET, 16) |
| |
| /* Enforce 16-byte alignment for the stack pointer, to permit general |
| compliance with e.g. Altivec instructions requirements. Make sure |
| this isn't overruled by the EABI constraints. */ |
| |
| #undef STACK_BOUNDARY |
| #define STACK_BOUNDARY (16*BITS_PER_UNIT) |
| |
| #undef PREFERRED_STACK_BOUNDARY |
| #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY |
| |
| #undef ABI_STACK_BOUNDARY |
| |
| #undef STARTFILE_PREFIX_SPEC |
| #define STARTFILE_PREFIX_SPEC \ |
| "%{mrtp:%{!shared:/lib/usr/lib/ppc/PPC32/common}}" |
| |
| /* For aggregates passing, use the same, consistent ABI as Linux. */ |
| #define AGGREGATE_PADDING_FIXED 0 |
| #define AGGREGATES_PAD_UPWARD_ALWAYS 0 |
| |
| #undef ASM_SPEC |
| #define ASM_SPEC \ |
| "%(asm_cpu) \ |
| %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \ |
| %{mrelocatable} %{mrelocatable-lib} %{" FPIC_SPEC ":-K PIC} -mbig" |
| |
| #undef CC1_SPEC |
| #define CC1_SPEC VXWORKS_CC1_SPEC " \ |
| %{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default} \ |
| %{mlittle|mlittle-endian:-mstrict-align}" |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_RELAX_LINK_SPEC |
| |
| #undef TARGET_DEFAULT |
| #define TARGET_DEFAULT (OPTION_MASK_EABI | MASK_STRICT_ALIGN) |
| |
| #undef PROCESSOR_DEFAULT |
| #define PROCESSOR_DEFAULT PROCESSOR_PPC604 |
| |
| /* Only big endian PPC is supported by VxWorks. */ |
| #undef BYTES_BIG_ENDIAN |
| #define BYTES_BIG_ENDIAN 1 |
| |
| #undef WORDS_BIG_ENDIAN |
| #define WORDS_BIG_ENDIAN 1 |
| |
| #undef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS /* none needed */ |
| |
| #else /* TARGET_VXWORKS7 */ |
| |
| /*-------------------------------------------------------------*/ |
| /* Post-VxWorks7 (SR600) configuration. */ |
| /*-------------------------------------------------------------*/ |
| |
| /* VxWorks does not use local symbols for the function entry point. */ |
| #undef DOT_SYMBOLS |
| #define DOT_SYMBOLS 0 |
| |
| /* For link specs, we leverage the linux configuration bits through |
| LINK_OS_EXTRA_SPEC32/64 and need to cancel the default %(link_os) |
| expansion in VXWORKS_LINK_SPEC. */ |
| |
| #undef VXWORKS_LINK_OS_SPEC |
| #define VXWORKS_LINK_OS_SPEC "" |
| |
| #undef LINK_OS_EXTRA_SPEC32 |
| #define LINK_OS_EXTRA_SPEC32 VXWORKS_LINK_SPEC " " VXWORKS_RELAX_LINK_SPEC |
| |
| #undef LINK_OS_EXTRA_SPEC64 |
| #define LINK_OS_EXTRA_SPEC64 VXWORKS_LINK_SPEC |
| |
| /* Leave TARGET_FLOAT128_ENABLE_TYPE alone here, possibly inherited from |
| a linux configuration file. This lets compilation tests pass and will |
| trigger visible link errors (hence remain harmless) if the support isn't |
| really there. */ |
| |
| #endif /* TARGET_VXWORKS7 */ |
| |
