434 lines
15 KiB
C
434 lines
15 KiB
C
/* Definitions for 64-bit PowerPC running FreeBSD using the ELF format
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Copyright (C) 2012-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* Override the defaults, which exist to force the proper definition. */
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#ifdef IN_LIBGCC2
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#undef TARGET_64BIT
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#ifdef __powerpc64__
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#define TARGET_64BIT 1
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#else
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#define TARGET_64BIT 0
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#endif
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#endif
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#undef TARGET_AIX
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#define TARGET_AIX TARGET_64BIT
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#ifdef HAVE_LD_NO_DOT_SYMS
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/* New ABI uses a local sym for the function entry point. */
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extern int dot_symbols;
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#undef DOT_SYMBOLS
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#define DOT_SYMBOLS dot_symbols
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#endif
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#define TARGET_USES_LINUX64_OPT 1
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#ifdef HAVE_LD_LARGE_TOC
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#undef TARGET_CMODEL
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#define TARGET_CMODEL rs6000_current_cmodel
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#define SET_CMODEL(opt) rs6000_current_cmodel = opt
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#else
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#define SET_CMODEL(opt) do {} while (0)
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#endif
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/* Until now the 970 is the only Processor where FreeBSD 64-bit runs on. */
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#undef PROCESSOR_DEFAULT
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#define PROCESSOR_DEFAULT PROCESSOR_POWER4
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#undef PROCESSOR_DEFAULT64
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#define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
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/* We don't need to generate entries in .fixup, except when
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-mrelocatable or -mrelocatable-lib is given. */
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#undef RELOCATABLE_NEEDS_FIXUP
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#define RELOCATABLE_NEEDS_FIXUP \
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(rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
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#undef RS6000_ABI_NAME
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#define RS6000_ABI_NAME "freebsd"
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#define INVALID_64BIT "-m%s not supported in this configuration"
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#define INVALID_32BIT INVALID_64BIT
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/* Use LINUX64 instead of FREEBSD64 for compat with e.g. sysv4le.h */
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#ifdef LINUX64_DEFAULT_ABI_ELFv2
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#define ELFv2_ABI_CHECK (rs6000_elf_abi != 1)
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#else
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#define ELFv2_ABI_CHECK (rs6000_elf_abi == 2)
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#endif
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#undef SUBSUBTARGET_OVERRIDE_OPTIONS
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#define SUBSUBTARGET_OVERRIDE_OPTIONS \
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do \
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{ \
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if (!global_options_set.x_rs6000_alignment_flags) \
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rs6000_alignment_flags = MASK_ALIGN_NATURAL; \
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if (TARGET_64BIT) \
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{ \
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if (DEFAULT_ABI != ABI_AIX) \
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{ \
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rs6000_current_abi = ABI_AIX; \
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error (INVALID_64BIT, "call"); \
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} \
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dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \
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if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \
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{ \
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rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \
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error (INVALID_64BIT, "relocatable"); \
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} \
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if (ELFv2_ABI_CHECK) \
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{ \
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rs6000_current_abi = ABI_ELFv2; \
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if (dot_symbols) \
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error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \
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} \
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if (rs6000_isa_flags & OPTION_MASK_EABI) \
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{ \
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rs6000_isa_flags &= ~OPTION_MASK_EABI; \
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error (INVALID_64BIT, "eabi"); \
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} \
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if (TARGET_PROTOTYPE) \
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{ \
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target_prototype = 0; \
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error (INVALID_64BIT, "prototype"); \
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} \
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if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \
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{ \
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rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
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error ("-m64 requires a PowerPC64 cpu"); \
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} \
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if ((rs6000_isa_flags_explicit \
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& OPTION_MASK_MINIMAL_TOC) != 0) \
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{ \
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if (global_options_set.x_rs6000_current_cmodel \
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&& rs6000_current_cmodel != CMODEL_SMALL) \
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error ("-mcmodel incompatible with other toc options"); \
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SET_CMODEL (CMODEL_SMALL); \
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} \
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else \
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{ \
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if (!global_options_set.x_rs6000_current_cmodel) \
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SET_CMODEL (CMODEL_MEDIUM); \
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if (rs6000_current_cmodel != CMODEL_SMALL) \
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{ \
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TARGET_NO_FP_IN_TOC = 0; \
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TARGET_NO_SUM_IN_TOC = 0; \
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} \
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} \
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} \
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} \
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while (0)
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#undef ASM_DEFAULT_SPEC
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#undef ASM_SPEC
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#undef LINK_OS_FREEBSD_SPEC
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#define ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
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#define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
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#define LINK_OS_FREEBSD_SPEC "%{m32:%(link_os_freebsd_spec32)}%{!m32:%(link_os_freebsd_spec64)}"
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#define ASM_SPEC32 "-a32 \
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%{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
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%{memb} %{!memb: %{msdata=eabi: -memb}} \
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%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
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%{mcall-freebsd: -mbig} \
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%{mcall-i960-old: -mlittle} \
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%{mcall-linux: -mbig} \
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%{mcall-gnu: -mbig} \
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%{mcall-netbsd: -mbig} \
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}}}}"
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#define ASM_SPEC64 "-a64"
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#define ASM_SPEC_COMMON "%(asm_cpu) \
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%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
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%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
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#undef SUBSUBTARGET_EXTRA_SPECS
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#define SUBSUBTARGET_EXTRA_SPECS \
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{ "asm_spec_common", ASM_SPEC_COMMON }, \
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{ "asm_spec32", ASM_SPEC32 }, \
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{ "asm_spec64", ASM_SPEC64 }, \
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{ "link_os_freebsd_spec32", LINK_OS_FREEBSD_SPEC32 }, \
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{ "link_os_freebsd_spec64", LINK_OS_FREEBSD_SPEC64 },
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#define LINK_OS_FREEBSD_SPEC_DEF "\
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%{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
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%{v:-V} \
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%{assert*} %{R*} %{rpath*} %{defsym*} \
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%{shared:-Bshareable %{h*} %{soname*}} \
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%{!shared: \
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%{!static: \
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%{rdynamic: -export-dynamic} \
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%{!dynamic-linker:-dynamic-linker " FBSD_DYNAMIC_LINKER "}} \
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%{static:-Bstatic}} \
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%{symbolic:-Bsymbolic}"
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#define LINK_OS_FREEBSD_SPEC32 "-melf32ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF
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#define LINK_OS_FREEBSD_SPEC64 "-melf64ppc_fbsd " LINK_OS_FREEBSD_SPEC_DEF
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#undef MULTILIB_DEFAULTS
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#define MULTILIB_DEFAULTS { "m64" }
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/* PowerPC-64 FreeBSD increases natural record alignment to doubleword if
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the first field is an FP double, only if in power alignment mode. */
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#undef ROUND_TYPE_ALIGN
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#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
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((TARGET_64BIT \
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&& (TREE_CODE (STRUCT) == RECORD_TYPE \
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|| TREE_CODE (STRUCT) == UNION_TYPE \
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|| TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
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&& TARGET_ALIGN_NATURAL == 0) \
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? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
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: MAX ((COMPUTED), (SPECIFIED)))
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/* Use the default for compiling target libs. */
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#ifdef IN_TARGET_LIBS
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#undef TARGET_ALIGN_NATURAL
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#define TARGET_ALIGN_NATURAL 1
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#endif
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/* Indicate that jump tables go in the text section. */
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#undef JUMP_TABLES_IN_TEXT_SECTION
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#define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
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/* The linux ppc64 ABI isn't explicit on whether aggregates smaller
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than a doubleword should be padded upward or downward. You could
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reasonably assume that they follow the normal rules for structure
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layout treating the parameter area as any other block of memory,
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then map the reg param area to registers. i.e. pad upward.
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Setting both of the following defines results in this behavior.
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Setting just the first one will result in aggregates that fit in a
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doubleword being padded downward, and others being padded upward.
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Not a bad idea as this results in struct { int x; } being passed
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the same way as an int. */
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#define AGGREGATE_PADDING_FIXED TARGET_64BIT
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#define AGGREGATES_PAD_UPWARD_ALWAYS 0
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/* Specify padding for the last element of a block move between
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registers and memory. FIRST is nonzero if this is the only
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element. */
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#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
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(!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
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/* FreeBSD doesn't support saving and restoring 64-bit regs with a 32-bit
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kernel. This is supported when running on a 64-bit kernel with
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COMPAT_FREEBSD32, but tell GCC it isn't so that our 32-bit binaries
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are compatible. */
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#define OS_MISSING_POWERPC64 !TARGET_64BIT
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#undef FBSD_TARGET_CPU_CPP_BUILTINS
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#define FBSD_TARGET_CPU_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__PPC__"); \
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builtin_define ("__ppc__"); \
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builtin_define ("__powerpc__"); \
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if (TARGET_64BIT) \
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{ \
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builtin_define ("__arch64__"); \
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builtin_define ("__LP64__"); \
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builtin_define ("__PPC64__"); \
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builtin_define ("__powerpc64__"); \
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builtin_assert ("cpu=powerpc64"); \
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builtin_assert ("machine=powerpc64"); \
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} \
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else \
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{ \
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builtin_define_std ("PPC"); \
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builtin_define_std ("powerpc"); \
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builtin_assert ("cpu=powerpc"); \
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builtin_assert ("machine=powerpc"); \
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TARGET_OS_SYSV_CPP_BUILTINS (); \
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} \
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} \
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while (0)
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#undef CPP_OS_DEFAULT_SPEC
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#define CPP_OS_DEFAULT_SPEC "%(cpp_os_freebsd)"
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#undef CPP_OS_FREEBSD_SPEC
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#define CPP_OS_FREEBSD_SPEC ""
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#undef STARTFILE_DEFAULT_SPEC
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#define STARTFILE_DEFAULT_SPEC "%(startfile_freebsd)"
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#undef ENDFILE_DEFAULT_SPEC
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#define ENDFILE_DEFAULT_SPEC "%(endfile_freebsd)"
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#undef LIB_DEFAULT_SPEC
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#define LIB_DEFAULT_SPEC "%(lib_freebsd)"
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#undef LINK_START_DEFAULT_SPEC
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#define LINK_START_DEFAULT_SPEC "%(link_start_freebsd)"
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#undef LINK_OS_DEFAULT_SPEC
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#define LINK_OS_DEFAULT_SPEC "%(link_os_freebsd)"
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/* XXX: This is wrong for many platforms in sysv4.h.
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We should work on getting that definition fixed. */
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#undef LINK_SHLIB_SPEC
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#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
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/************************[ Target stuff ]***********************************/
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/* Define the actual types of some ANSI-mandated types.
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Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
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c-common.c, and config/<arch>/<arch>.h. */
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#undef SIZE_TYPE
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#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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/* rs6000.h gets this wrong for FreeBSD. We use the GCC defaults instead. */
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#undef WCHAR_TYPE
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE 32
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/* Override rs6000.h definition. */
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#undef ASM_APP_ON
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#define ASM_APP_ON "#APP\n"
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/* Override rs6000.h definition. */
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#undef ASM_APP_OFF
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#define ASM_APP_OFF "#NO_APP\n"
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/* Function profiling bits */
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#undef RS6000_MCOUNT
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#define RS6000_MCOUNT "_mcount"
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#define PROFILE_HOOK(LABEL) \
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do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
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/* _init and _fini functions are built from bits spread across many
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object files, each potentially with a different TOC pointer. For
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that reason, place a nop after the call so that the linker can
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restore the TOC pointer if a TOC adjusting call stub is needed. */
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#ifdef __powerpc64__
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#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
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asm (SECTION_OP "\n" \
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" bl " #FUNC "\n" \
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" nop\n" \
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" .previous");
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#endif
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/* FP save and restore routines. */
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#undef SAVE_FP_PREFIX
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#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
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#undef SAVE_FP_SUFFIX
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#define SAVE_FP_SUFFIX ""
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#undef RESTORE_FP_PREFIX
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#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
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#undef RESTORE_FP_SUFFIX
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#define RESTORE_FP_SUFFIX ""
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/* Select a format to encode pointers in exception handling data. CODE
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is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
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true if the symbol may be affected by dynamic relocations. */
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#undef ASM_PREFERRED_EH_DATA_FORMAT
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
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(TARGET_64BIT || flag_pic \
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? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
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| (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
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: DW_EH_PE_absptr)
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/* Static stack checking is supported by means of probes. */
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#define STACK_CHECK_STATIC_BUILTIN 1
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/* The default value isn't sufficient in 64-bit mode. */
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#define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024)
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/* Use standard DWARF numbering for DWARF debugging information. */
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#define RS6000_USE_DWARF_NUMBERING
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/* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */
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#undef ADJUST_FIELD_ALIGN
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#define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
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(rs6000_special_adjust_field_align_p ((TYPE), (COMPUTED)) \
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? 128 \
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: (TARGET_64BIT \
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&& TARGET_ALIGN_NATURAL == 0 \
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&& TYPE_MODE (strip_array_types (TYPE)) == DFmode) \
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? MIN ((COMPUTED), 32) \
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: (COMPUTED))
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#undef TOC_SECTION_ASM_OP
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#define TOC_SECTION_ASM_OP \
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(TARGET_64BIT \
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? "\t.section\t\".toc\",\"aw\"" \
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: "\t.section\t\".got\",\"aw\"")
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#undef MINIMAL_TOC_SECTION_ASM_OP
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#define MINIMAL_TOC_SECTION_ASM_OP \
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(TARGET_64BIT \
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? "\t.section\t\".toc1\",\"aw\"" \
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: (flag_pic \
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? "\t.section\t\".got2\",\"aw\"" \
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: "\t.section\t\".got1\",\"aw\""))
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/* This is how to declare the size of a function. */
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#undef ASM_DECLARE_FUNCTION_SIZE
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#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
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do \
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{ \
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if (!flag_inhibit_size_directive) \
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{ \
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fputs ("\t.size\t", (FILE)); \
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if (TARGET_64BIT && DOT_SYMBOLS) \
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putc ('.', (FILE)); \
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assemble_name ((FILE), (FNAME)); \
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fputs (",.-", (FILE)); \
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rs6000_output_function_entry (FILE, FNAME); \
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putc ('\n', (FILE)); \
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} \
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} \
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while (0)
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#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
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#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
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(TARGET_TOC \
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&& (GET_CODE (X) == SYMBOL_REF \
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|| (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
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&& GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
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|| GET_CODE (X) == LABEL_REF \
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|| (GET_CODE (X) == CONST_INT \
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&& GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
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|| (GET_CODE (X) == CONST_DOUBLE \
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&& ((TARGET_64BIT \
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&& (TARGET_MINIMAL_TOC \
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|| (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
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&& ! TARGET_NO_FP_IN_TOC))) \
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|| (!TARGET_64BIT \
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&& !TARGET_NO_FP_IN_TOC \
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&& SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
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&& BITS_PER_WORD == HOST_BITS_PER_INT)))))
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/* Use --as-needed -lgcc_s for eh support. */
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#ifdef HAVE_LD_AS_NEEDED
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#define USE_LD_AS_NEEDED 1
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#endif
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#define POWERPC_FREEBSD
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