along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
-/* Note to future editors: VxWorks is mostly an EABI target. We do
- not use rs6000/eabi.h because we would have to override most of
- it anyway. However, if you change that file, consider making
- analogous changes here too. */
+/* 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. */
} \
while (0)
-/* vx6 library path. */
-#if !TARGET_VXWORKS7
-#undef STARTFILE_PREFIX_SPEC
-#define STARTFILE_PREFIX_SPEC \
- "%{mrtp:%{!shared:%:getenv(WIND_BASE /target/lib/usr/lib/ppc/PPC32/common)}}"
+/* Specific CPU macro definitions expected by the system headers,
+ inferred from -mcpu requests by the user. Different versions of
+ VxWorks expect different forms of macros, such as
+
+ -D_VX_CPU=_VX_PPC403 on Vx7 and some variants of Vx6,
+ -DCPU=PPC403 on all Vx6 and earlier. */
+
+#if TARGET_VXWORKS7
+#define VX_CPU_PREFIX "_VX_"
+#else
+#define VX_CPU_PREFIX ""
#endif
-/* 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
+#define VX_CPUDEF(CPUID) \
+ ":-D" VX_CPU_PREFIX "CPU=" VX_CPU_PREFIX #CPUID
-/* We have to kill off the entire specs set created by rs6000/sysv4.h
- and substitute our own set. The top level vxworks.h has done some
- of this for us. */
+#define VX_MCPU(CPU,CPUID) \
+ "mcpu=" #CPU VX_CPUDEF(CPUID)
-#undef SUBTARGET_EXTRA_SPECS
#undef CPP_SPEC
-#undef CC1_SPEC
-#undef ASM_SPEC
-
-#define SUBTARGET_EXTRA_SPECS /* none needed */
+#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, E6500) ";" \
+ 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. */
-#define CPP_SPEC \
-"%{!DCPU=*: \
- %{mcpu=403 : -DCPU=PPC403 ; \
- mcpu=405 : -DCPU=PPC405 ; \
- mcpu=440 : -DCPU=PPC440 ; \
- mcpu=464 : -DCPU=PPC464 ; \
- mcpu=476 : -DCPU=PPC476 ; \
- mcpu=603 : -DCPU=PPC603 ; \
- mcpu=604 : -DCPU=PPC604 ; \
- mcpu=860 : -DCPU=PPC860 ; \
- mcpu=8540: -DCPU=PPC85XX ; \
- mcpu=8548: -DCPU=PPC85XX ; \
- : -DCPU=PPC604 }}" \
-VXWORKS_ADDITIONAL_CPP_SPEC
-
-#define CC1_SPEC \
-"%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default} \
- %{mlittle|mlittle-endian:-mstrict-align}"
-
-#define ASM_SPEC \
-"%(asm_cpu) \
- %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
- %{mrelocatable} %{mrelocatable-lib} %{" FPIC_SPEC ":-K PIC} -mbig"
+ config-ml.in insists on a "." multilib. */
#undef LIB_SPEC
#define LIB_SPEC VXWORKS_LIB_SPEC
-/* For RTPs, leverage linker relaxation. This helps programs referring
- to, typically, kernel services too far away for short calls. This is more
- precise than -mlongcall and can be overriden with -Wl,--no-relax. */
-#define VXWORKS_RELAX_LINK_SPEC "%{mrtp:--relax}"
-
-#undef LINK_SPEC
-#define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_RELAX_LINK_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
-#undef TARGET_DEFAULT
-#define TARGET_DEFAULT (MASK_EABI | MASK_STRICT_ALIGN)
+/* No _mcount profiling on VxWorks. */
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
-#undef PROCESSOR_DEFAULT
-#define PROCESSOR_DEFAULT PROCESSOR_PPC604
+/* Initialize library function table. */
+#undef TARGET_INIT_LIBFUNCS
+#define TARGET_INIT_LIBFUNCS rs6000_vxworks_init_libfuncs
/* 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)
-/* 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 SUB3TARGET_OVERRIDE_OPTIONS
+#define SUB3TARGET_OVERRIDE_OPTIONS \
+ do { \
+ if (!global_options_set.x_g_switch_value) \
+ g_switch_value = SDATA_DEFAULT_SIZE; \
+ VXWORKS_OVERRIDE_OPTIONS; \
+ } while (0)
-#undef STACK_BOUNDARY
-#define STACK_BOUNDARY (16*BITS_PER_UNIT)
+/* The stack pointer need not be moved while checking the stack. */
+#undef STACK_CHECK_MOVING_SP
-#undef PREFERRED_STACK_BOUNDARY
-#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
+/* Define this to be nonzero if static stack checking is supported. */
+#define STACK_CHECK_STATIC_BUILTIN 1
-#undef ABI_STACK_BOUNDARY
+/* 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 \
RS6000_ALIGN (crtl->outgoing_args_size.to_constant () \
+ STACK_POINTER_OFFSET, 16)
-#undef SUBSUBTARGET_OVERRIDE_OPTIONS
-#define SUBSUBTARGET_OVERRIDE_OPTIONS \
- do { \
- if (!global_options_set.x_g_switch_value) \
- g_switch_value = SDATA_DEFAULT_SIZE; \
- VXWORKS_OVERRIDE_OPTIONS; \
- } while (0)
+/* 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. */
-/* No _mcount profiling on VxWorks. */
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)
+#undef STACK_BOUNDARY
+#define STACK_BOUNDARY (16*BITS_PER_UNIT)
-/* Define this to be nonzero if static stack checking is supported. */
-#define STACK_CHECK_STATIC_BUILTIN 1
+#undef PREFERRED_STACK_BOUNDARY
+#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
+
+#undef ABI_STACK_BOUNDARY
+
+#undef STARTFILE_PREFIX_SPEC
+#define STARTFILE_PREFIX_SPEC \
+ "%{mrtp:%{!shared:%:getenv(WIND_BASE /target/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 (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
+
+#undef LINK_OS_VXWORKS_SPEC
+#define LINK_OS_VXWORKS_SPEC \
+ " %{!mrtp:-r} %{mrtp:-q -static} %{!Xbind-lazy:-z now}"
+
+#undef LINK_OS_EXTRA_SPEC32
+#define LINK_OS_EXTRA_SPEC32 LINK_OS_VXWORKS_SPEC " " VXWORKS_RELAX_LINK_SPEC
+
+#undef LINK_OS_EXTRA_SPEC64
+#define LINK_OS_EXTRA_SPEC64 LINK_OS_VXWORKS_SPEC
+
+/* linux64.h enables this, not supported in vxWorks. */
+#undef TARGET_FLOAT128_ENABLE_TYPE
+#define TARGET_FLOAT128_ENABLE_TYPE 0
+
+#endif /* TARGET_VXWORKS7 */
-/* This platform supports the probing method of stack checking (RTP mode).
- 8K is reserved in the stack to propagate exceptions in case of overflow. */
-#define STACK_CHECK_PROTECT 8192
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