/* Definitions of target machine for GNU compiler. Vxworks PowerPC version.
Copyright (C) 1996-2025 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%{msmp:_smp}/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 */