Index: gcc/config/rs6000/openbsd64.h
--- gcc/config/rs6000/openbsd64.h.orig
+++ gcc/config/rs6000/openbsd64.h
@@ -0,0 +1,413 @@
+/* Definitions for 64-bit PowerPC running OpenBSD using the ELF format
+ Copyright (C) 2012-2021 Free Software Foundation, Inc.
+
+ 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
+ . */
+
+/* Override the defaults, which exist to force the proper definition. */
+
+#ifdef IN_LIBGCC2
+#undef TARGET_64BIT
+#ifdef __powerpc64__
+#define TARGET_64BIT 1
+#else
+#define TARGET_64BIT 0
+#endif
+#endif
+
+#undef TARGET_AIX
+#define TARGET_AIX TARGET_64BIT
+
+#ifdef HAVE_LD_NO_DOT_SYMS
+/* New ABI uses a local sym for the function entry point. */
+extern int dot_symbols;
+#undef DOT_SYMBOLS
+#define DOT_SYMBOLS dot_symbols
+#endif
+
+#define TARGET_USES_LINUX64_OPT 1
+#ifdef HAVE_LD_LARGE_TOC
+#undef TARGET_CMODEL
+#define TARGET_CMODEL rs6000_current_cmodel
+#define SET_CMODEL(opt) rs6000_current_cmodel = opt
+#else
+#define SET_CMODEL(opt) do {} while (0)
+#endif
+
+#undef PROCESSOR_DEFAULT
+#define PROCESSOR_DEFAULT PROCESSOR_POWER7
+#undef PROCESSOR_DEFAULT64
+#define PROCESSOR_DEFAULT64 PROCESSOR_POWER8
+
+/* We don't need to generate entries in .fixup, except when
+ -mrelocatable or -mrelocatable-lib is given. */
+#undef RELOCATABLE_NEEDS_FIXUP
+#define RELOCATABLE_NEEDS_FIXUP \
+ (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
+
+#undef RS6000_ABI_NAME
+#define RS6000_ABI_NAME "openbsd"
+
+#define INVALID_64BIT "%<-m%s%> not supported in this configuration"
+#define INVALID_32BIT INVALID_64BIT
+
+/* OpenBSD/powerpc64 uses the ELF v2 ABI by default. */
+#define ELFv2_ABI_CHECK (rs6000_elf_abi != 1)
+
+#undef SUBSUBTARGET_OVERRIDE_OPTIONS
+#define SUBSUBTARGET_OVERRIDE_OPTIONS \
+ do \
+ { \
+ if (!global_options_set.x_rs6000_alignment_flags) \
+ rs6000_alignment_flags = MASK_ALIGN_NATURAL; \
+ if (TARGET_64BIT) \
+ { \
+ if (DEFAULT_ABI != ABI_AIX) \
+ { \
+ rs6000_current_abi = ABI_AIX; \
+ error (INVALID_64BIT, "call"); \
+ } \
+ dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \
+ if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \
+ { \
+ rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \
+ error (INVALID_64BIT, "relocatable"); \
+ } \
+ if (ELFv2_ABI_CHECK) \
+ { \
+ rs6000_current_abi = ABI_ELFv2; \
+ if (dot_symbols) \
+ error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \
+ } \
+ if (rs6000_isa_flags & OPTION_MASK_EABI) \
+ { \
+ rs6000_isa_flags &= ~OPTION_MASK_EABI; \
+ error (INVALID_64BIT, "eabi"); \
+ } \
+ if (TARGET_PROTOTYPE) \
+ { \
+ target_prototype = 0; \
+ error (INVALID_64BIT, "prototype"); \
+ } \
+ if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \
+ { \
+ rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
+ error ("-m64 requires a PowerPC64 cpu"); \
+ } \
+ if ((rs6000_isa_flags_explicit \
+ & OPTION_MASK_MINIMAL_TOC) != 0) \
+ { \
+ if (global_options_set.x_rs6000_current_cmodel \
+ && rs6000_current_cmodel != CMODEL_SMALL) \
+ error ("-mcmodel incompatible with other toc options"); \
+ SET_CMODEL (CMODEL_SMALL); \
+ } \
+ else \
+ { \
+ if (!global_options_set.x_rs6000_current_cmodel) \
+ SET_CMODEL (CMODEL_MEDIUM); \
+ if (rs6000_current_cmodel != CMODEL_SMALL) \
+ { \
+ TARGET_NO_FP_IN_TOC = 0; \
+ TARGET_NO_SUM_IN_TOC = 0; \
+ } \
+ } \
+ } \
+ } \
+ while (0)
+
+#undef ASM_DEFAULT_SPEC
+#undef ASM_SPEC
+
+#define ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
+#define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
+
+#define ASM_SPEC32 "-a32 \
+%{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
+%{memb} %{!memb: %{msdata=eabi: -memb}} \
+%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
+ %{mcall-freebsd: -mbig} \
+ %{mcall-i960-old: -mlittle} \
+ %{mcall-linux: -mbig} \
+ %{mcall-gnu: -mbig} \
+ %{mcall-netbsd: -mbig} \
+}}}}"
+
+#define ASM_SPEC64 "-a64"
+
+#define ASM_SPEC_COMMON "%(asm_cpu) \
+%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
+%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
+
+#undef SUBSUBTARGET_EXTRA_SPECS
+#define SUBSUBTARGET_EXTRA_SPECS \
+ { "asm_spec_common", ASM_SPEC_COMMON }, \
+ { "asm_spec32", ASM_SPEC32 }, \
+ { "asm_spec64", ASM_SPEC64 },
+
+#undef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS { "m64" }
+
+/* OpenBSD/powerpc64 increases natural record alignment to doubleword if
+ the first field is an FP double, only if in power alignment mode. */
+#undef ROUND_TYPE_ALIGN
+#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
+ ((TARGET_64BIT \
+ && (TREE_CODE (STRUCT) == RECORD_TYPE \
+ || TREE_CODE (STRUCT) == UNION_TYPE \
+ || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
+ && TARGET_ALIGN_NATURAL == 0) \
+ ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
+ : MAX ((COMPUTED), (SPECIFIED)))
+
+/* Use the default for compiling target libs. */
+#ifdef IN_TARGET_LIBS
+#undef TARGET_ALIGN_NATURAL
+#define TARGET_ALIGN_NATURAL 1
+#endif
+
+/* Indicate that jump tables go in the text section. */
+#undef JUMP_TABLES_IN_TEXT_SECTION
+#define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
+
+/* The linux ppc64 ABI isn't explicit on whether aggregates smaller
+ than a doubleword should be padded upward or downward. You could
+ reasonably assume that they follow the normal rules for structure
+ layout treating the parameter area as any other block of memory,
+ then map the reg param area to registers. i.e. pad upward.
+ Setting both of the following defines results in this behavior.
+ Setting just the first one will result in aggregates that fit in a
+ doubleword being padded downward, and others being padded upward.
+ Not a bad idea as this results in struct { int x; } being passed
+ the same way as an int. */
+#define AGGREGATE_PADDING_FIXED TARGET_64BIT
+#define AGGREGATES_PAD_UPWARD_ALWAYS 0
+
+/* Specify padding for the last element of a block move between
+ registers and memory. FIRST is nonzero if this is the only
+ element. */
+#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
+ (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE))
+
+/* OpenBSD doesn't support saving and restoring 64-bit regs with a 32-bit
+ kernel. */
+#define OS_MISSING_POWERPC64 !TARGET_64BIT
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ OPENBSD_OS_CPP_BUILTINS_ELF(); \
+ builtin_define ("__PPC__"); \
+ builtin_define ("__ppc__"); \
+ builtin_define ("__powerpc__"); \
+ if (TARGET_64BIT) \
+ { \
+ builtin_define ("__arch64__"); \
+ builtin_define ("__LP64__"); \
+ builtin_define ("__PPC64__"); \
+ builtin_define ("__powerpc64__"); \
+ builtin_assert ("cpu=powerpc64"); \
+ builtin_assert ("machine=powerpc64"); \
+ } \
+ else \
+ { \
+ builtin_define_std ("PPC"); \
+ builtin_define_std ("powerpc"); \
+ builtin_assert ("cpu=powerpc"); \
+ builtin_assert ("machine=powerpc"); \
+ TARGET_OS_SYSV_CPP_BUILTINS (); \
+ } \
+ } \
+ while (0)
+
+#undef CPP_OS_DEFAULT_SPEC
+#define CPP_OS_DEFAULT_SPEC "%(cpp_os_openbsd)"
+
+#undef LINK_SPEC
+#define LINK_SPEC \
+ "%{!shared:%{!nostdlib:%{!r:%{!e*:-e __start}}}} \
+ %{shared:-shared} %{R*} \
+ %{static:-Bstatic} \
+ %{!static:-Bdynamic} \
+ %{rdynamic:-export-dynamic} \
+ %{assert*} \
+ %{!static:-dynamic-linker /usr/libexec/ld.so} \
+ %{!nostdlib:-L/usr/lib}"
+
+#undef LIB_DEFAULT_SPEC
+#define LIB_DEFAULT_SPEC "%(lib_openbsd)"
+
+#undef STARTFILE_DEFAULT_SPEC
+#define STARTFILE_DEFAULT_SPEC "%(startfile_openbsd)"
+
+#undef ENDFILE_DEFAULT_SPEC
+#define ENDFILE_DEFAULT_SPEC "%(endfile_openbsd)"
+
+#undef LINK_START_DEFAULT_SPEC
+#define LINK_START_DEFAULT_SPEC "%(link_start_openbsd)"
+
+#undef LINK_OS_DEFAULT_SPEC
+#define LINK_OS_DEFAULT_SPEC "%(link_os_openbsd)"
+
+/************************[ Target stuff ]***********************************/
+
+/* Define the actual types of some ANSI-mandated types.
+ Needs to agree with . GCC defaults come from c-decl.c,
+ c-common.c, and config//.h. */
+
+
+#undef SIZE_TYPE
+#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
+
+/* This must agree with */
+#undef SIZE_TYPE
+#define SIZE_TYPE "long unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "long int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+/* Override rs6000.h definition. */
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+/* Override rs6000.h definition. */
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+/* Function profiling bits */
+#undef RS6000_MCOUNT
+#define RS6000_MCOUNT "_mcount"
+
+#define PROFILE_HOOK(LABEL) \
+ do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
+
+/* _init and _fini functions are built from bits spread across many
+ object files, each potentially with a different TOC pointer. For
+ that reason, place a nop after the call so that the linker can
+ restore the TOC pointer if a TOC adjusting call stub is needed. */
+#ifdef __powerpc64__
+#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
+ asm (SECTION_OP "\n" \
+" bl " #FUNC "\n" \
+" nop\n" \
+" .previous");
+#endif
+
+/* FP save and restore routines. */
+#undef SAVE_FP_PREFIX
+#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
+#undef SAVE_FP_SUFFIX
+#define SAVE_FP_SUFFIX ""
+#undef RESTORE_FP_PREFIX
+#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
+#undef RESTORE_FP_SUFFIX
+#define RESTORE_FP_SUFFIX ""
+
+/* Select a format to encode pointers in exception handling data. CODE
+ is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
+ true if the symbol may be affected by dynamic relocations. */
+#undef ASM_PREFERRED_EH_DATA_FORMAT
+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
+ (TARGET_64BIT || flag_pic \
+ ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
+ | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
+ : DW_EH_PE_absptr)
+
+/* Static stack checking is supported by means of probes. */
+#define STACK_CHECK_STATIC_BUILTIN 1
+
+/* The default value isn't sufficient in 64-bit mode. */
+#define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024)
+
+/* Use standard DWARF numbering for DWARF debugging information. */
+#define RS6000_USE_DWARF_NUMBERING
+
+/* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */
+#undef ADJUST_FIELD_ALIGN
+#define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
+ (rs6000_special_adjust_field_align_p ((TYPE), (COMPUTED)) \
+ ? 128 \
+ : (TARGET_64BIT \
+ && TARGET_ALIGN_NATURAL == 0 \
+ && TYPE_MODE (strip_array_types (TYPE)) == DFmode) \
+ ? MIN ((COMPUTED), 32) \
+ : (COMPUTED))
+
+#undef TOC_SECTION_ASM_OP
+#define TOC_SECTION_ASM_OP \
+ (TARGET_64BIT \
+ ? "\t.section\t\".toc\",\"aw\"" \
+ : "\t.section\t\".got\",\"aw\"")
+
+#undef MINIMAL_TOC_SECTION_ASM_OP
+#define MINIMAL_TOC_SECTION_ASM_OP \
+ (TARGET_64BIT \
+ ? "\t.section\t\".toc1\",\"aw\"" \
+ : (flag_pic \
+ ? "\t.section\t\".got2\",\"aw\"" \
+ : "\t.section\t\".got1\",\"aw\""))
+
+/* This is how to declare the size of a function. */
+#undef ASM_DECLARE_FUNCTION_SIZE
+#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
+ do \
+ { \
+ if (!flag_inhibit_size_directive) \
+ { \
+ fputs ("\t.size\t", (FILE)); \
+ if (TARGET_64BIT && DOT_SYMBOLS) \
+ putc ('.', (FILE)); \
+ assemble_name ((FILE), (FNAME)); \
+ fputs (",.-", (FILE)); \
+ rs6000_output_function_entry (FILE, FNAME); \
+ putc ('\n', (FILE)); \
+ } \
+ } \
+ while (0)
+
+#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
+#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
+ (TARGET_TOC \
+ && (GET_CODE (X) == SYMBOL_REF \
+ || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
+ && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
+ || GET_CODE (X) == LABEL_REF \
+ || (GET_CODE (X) == CONST_INT \
+ && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
+ || (GET_CODE (X) == CONST_DOUBLE \
+ && ((TARGET_64BIT \
+ && (TARGET_MINIMAL_TOC \
+ || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
+ && ! TARGET_NO_FP_IN_TOC))) \
+ || (!TARGET_64BIT \
+ && !TARGET_NO_FP_IN_TOC \
+ && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
+ && BITS_PER_WORD == HOST_BITS_PER_INT)))))
+
+/* Use --as-needed -lgcc_s for eh support. */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif