diff options
Diffstat (limited to 'gcc-4.9/gcc/config/rs6000/linux64.h')
| -rw-r--r-- | gcc-4.9/gcc/config/rs6000/linux64.h | 583 |
1 files changed, 583 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/rs6000/linux64.h b/gcc-4.9/gcc/config/rs6000/linux64.h new file mode 100644 index 000000000..dbc9a527e --- /dev/null +++ b/gcc-4.9/gcc/config/rs6000/linux64.h @@ -0,0 +1,583 @@ +/* Definitions of target machine for GNU compiler, + for 64 bit PowerPC linux. + Copyright (C) 2000-2014 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. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef RS6000_BI_ARCH + +#undef TARGET_64BIT +#define TARGET_64BIT 1 + +#define DEFAULT_ARCH64_P 1 +#define RS6000_BI_ARCH_P 0 + +#else + +#define DEFAULT_ARCH64_P (TARGET_DEFAULT & MASK_64BIT) +#define RS6000_BI_ARCH_P 1 + +#endif + +#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_PROFILE_KERNEL profile_kernel + +#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 +#ifdef LINUX64_DEFAULT_ABI_ELFv2 +#define PROCESSOR_DEFAULT64 PROCESSOR_POWER8 +#else +#define PROCESSOR_DEFAULT64 PROCESSOR_POWER7 +#endif + +/* 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 "linux" + +#define INVALID_64BIT "-m%s not supported in this configuration" +#define INVALID_32BIT INVALID_64BIT + +#ifdef LINUX64_DEFAULT_ABI_ELFv2 +#define ELFv2_ABI_CHECK (rs6000_elf_abi != 1) +#else +#define ELFv2_ABI_CHECK (rs6000_elf_abi == 2) +#endif + +#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 (ELFv2_ABI_CHECK) \ + { \ + rs6000_current_abi = ABI_ELFv2; \ + if (dot_symbols) \ + error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \ + } \ + if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \ + { \ + rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \ + error (INVALID_64BIT, "relocatable"); \ + } \ + 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) \ + { \ + if (!global_options_set.x_TARGET_NO_FP_IN_TOC) \ + TARGET_NO_FP_IN_TOC \ + = rs6000_current_cmodel == CMODEL_MEDIUM; \ + if (!global_options_set.x_TARGET_NO_SUM_IN_TOC) \ + TARGET_NO_SUM_IN_TOC = 0; \ + } \ + } \ + } \ + else \ + { \ + if (!RS6000_BI_ARCH_P) \ + error (INVALID_32BIT, "32"); \ + if (TARGET_PROFILE_KERNEL) \ + { \ + TARGET_PROFILE_KERNEL = 0; \ + error (INVALID_32BIT, "profile-kernel"); \ + } \ + if (global_options_set.x_rs6000_current_cmodel) \ + { \ + SET_CMODEL (CMODEL_SMALL); \ + error (INVALID_32BIT, "cmodel"); \ + } \ + } \ + } \ + while (0) + +#undef ASM_DEFAULT_SPEC +#undef ASM_SPEC +#undef LINK_OS_LINUX_SPEC + +#ifndef RS6000_BI_ARCH +#define ASM_DEFAULT_SPEC "-mppc64" +#define ASM_SPEC "%(asm_spec64) %(asm_spec_common)" +#define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)" +#else +#if DEFAULT_ARCH64_P +#define ASM_DEFAULT_SPEC "-mppc%{!m32:64}" +#define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)" +#define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}" +#else +#define ASM_DEFAULT_SPEC "-mppc%{m64:64}" +#define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)" +#define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}" +#endif +#endif + +#define ASM_SPEC32 "-a32 \ +%{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \ +%{memb|msdata=eabi: -memb}" + +#define ASM_SPEC64 "-a64" + +#define ASM_SPEC_COMMON "%(asm_cpu) \ +%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \ + ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN) + +#undef SUBSUBTARGET_EXTRA_SPECS +#define SUBSUBTARGET_EXTRA_SPECS \ + { "asm_spec_common", ASM_SPEC_COMMON }, \ + { "asm_spec32", ASM_SPEC32 }, \ + { "asm_spec64", ASM_SPEC64 }, \ + { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \ + { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 }, + +#undef MULTILIB_DEFAULTS +#if DEFAULT_ARCH64_P +#define MULTILIB_DEFAULTS { "m64" } +#else +#define MULTILIB_DEFAULTS { "m32" } +#endif + +#ifndef RS6000_BI_ARCH + +/* 64-bit PowerPC Linux always has a TOC. */ +#undef TARGET_TOC +#define TARGET_TOC 1 + +/* Some things from sysv4.h we don't do when 64 bit. */ +#undef OPTION_RELOCATABLE +#define OPTION_RELOCATABLE 0 +#undef OPTION_EABI +#define OPTION_EABI 0 +#undef OPTION_PROTOTYPE +#define OPTION_PROTOTYPE 0 +#undef RELOCATABLE_NEEDS_FIXUP +#define RELOCATABLE_NEEDS_FIXUP 0 + +#endif + +/* We use glibc _mcount for profiling. */ +#define NO_PROFILE_COUNTERS 1 +#define PROFILE_HOOK(LABEL) \ + do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0) + +/* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */ +#undef ADJUST_FIELD_ALIGN +#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ + ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \ + ? 128 \ + : (TARGET_64BIT \ + && TARGET_ALIGN_NATURAL == 0 \ + && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \ + ? MIN ((COMPUTED), 32) \ + : (COMPUTED)) + +/* PowerPC64 Linux 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) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE)) + +/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit + process. */ +#define OS_MISSING_POWERPC64 !TARGET_64BIT + +#ifdef SINGLE_LIBC +#define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) +#define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) +#define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) +#else +#define OPTION_GLIBC (linux_libc == LIBC_GLIBC) +#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) +#define OPTION_BIONIC (linux_libc == LIBC_BIONIC) +#endif + +/* Determine what functions are present at the runtime; + this includes full c99 runtime and sincos. */ +#undef TARGET_LIBC_HAS_FUNCTION +#define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function + +#undef TARGET_OS_CPP_BUILTINS +#define TARGET_OS_CPP_BUILTINS() \ + do \ + { \ + if (TARGET_64BIT) \ + { \ + builtin_define ("__PPC__"); \ + builtin_define ("__PPC64__"); \ + builtin_define ("__powerpc__"); \ + builtin_define ("__powerpc64__"); \ + if (!DOT_SYMBOLS) \ + builtin_define ("_CALL_LINUX"); \ + 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_linux)" + +/* The GNU C++ standard library currently requires _GNU_SOURCE being + defined on glibc-based systems. This temporary hack accomplishes this, + it should go away as soon as libstdc++-v3 has a real fix. */ +#undef CPLUSPLUS_CPP_SPEC +#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" + +#undef LINK_SHLIB_SPEC +#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" + +#undef LIB_DEFAULT_SPEC +#define LIB_DEFAULT_SPEC "%(lib_linux)" + +#undef STARTFILE_DEFAULT_SPEC +#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" + +#undef ENDFILE_DEFAULT_SPEC +#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" + +#undef LINK_START_DEFAULT_SPEC +#define LINK_START_DEFAULT_SPEC "%(link_start_linux)" + +#undef LINK_OS_DEFAULT_SPEC +#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" + +#define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1" +#ifdef LINUX64_DEFAULT_ABI_ELFv2 +#define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv1:/lib64/ld64.so.1;:/lib64/ld64.so.2}" +#else +#define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv2:/lib64/ld64.so.2;:/lib64/ld64.so.1}" +#endif +#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" +#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" +#if DEFAULT_LIBC == LIBC_UCLIBC +#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}" +#elif DEFAULT_LIBC == LIBC_GLIBC +#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}" +#else +#error "Unsupported DEFAULT_LIBC" +#endif +#define GNU_USER_DYNAMIC_LINKER32 \ + CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32) +#define GNU_USER_DYNAMIC_LINKER64 \ + CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64) + +#undef DEFAULT_ASM_ENDIAN +#if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) +#define DEFAULT_ASM_ENDIAN " -mlittle" +#define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ + " -m elf32lppclinux", \ + " -m elf32lppclinux") +#define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ + " -m elf64lppc", \ + " -m elf64lppc") +#else +#define DEFAULT_ASM_ENDIAN " -mbig" +#define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ + " -m elf32lppclinux", \ + " -m elf32ppclinux") +#define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ + " -m elf64lppc", \ + " -m elf64ppc") +#endif + +#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \ + %{rdynamic:-export-dynamic} \ + -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}" + +#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \ + %{rdynamic:-export-dynamic} \ + -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}" + +#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\"" \ + : ((TARGET_RELOCATABLE || flag_pic) \ + ? "\t.section\t\".got2\",\"aw\"" \ + : "\t.section\t\".got1\",\"aw\"")) + +/* Must be at least as big as our pointer type. */ +#undef SIZE_TYPE +#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") + +#undef WCHAR_TYPE +#define WCHAR_TYPE (TARGET_64BIT ? "int" : "long 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" + +#undef RS6000_MCOUNT +#define RS6000_MCOUNT "_mcount" + +#ifdef __powerpc64__ +/* _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. */ +#if DOT_SYMBOLS +#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ + asm (SECTION_OP "\n" \ +" bl ." #FUNC "\n" \ +" nop\n" \ +" .previous"); +#else +#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ + asm (SECTION_OP "\n" \ +" bl " #FUNC "\n" \ +" nop\n" \ +" .previous"); +#endif +#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 "" + +/* Dwarf2 debugging. */ +#undef PREFERRED_DEBUGGING_TYPE +#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG + +/* 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) + +/* Return nonzero if this entry is to be written into the constant + pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF + or a CONST containing one of them. If -mfp-in-toc (the default), + we also do this for floating-point constants. We actually can only + do this if the FP formats of the target and host machines are the + same, but we can't check that since not every file that uses + the macros includes real.h. We also do this when we can write the + entry into the TOC and the entry is not larger than a TOC entry. */ + +#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 \ + && !TARGET_RELOCATABLE \ + && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \ + && BITS_PER_WORD == HOST_BITS_PER_INT))))) + +/* 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 || TARGET_RELOCATABLE) \ + ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \ + | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \ + : DW_EH_PE_absptr) + +/* For backward compatibility, we must continue to use the AIX + structure return convention. */ +#undef DRAFT_V4_STRUCT_RET +#define DRAFT_V4_STRUCT_RET (!TARGET_64BIT) + +#define TARGET_POSIX_IO + +#define LINK_GCC_C_SEQUENCE_SPEC \ + "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" + +/* Use --as-needed -lgcc_s for eh support. */ +#ifdef HAVE_LD_AS_NEEDED +#define USE_LD_AS_NEEDED 1 +#endif + +#ifdef TARGET_LIBC_PROVIDES_SSP +/* ppc32 glibc provides __stack_chk_guard in -0x7008(2), + ppc64 glibc provides it at -0x7010(13). */ +#define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? -0x7010 : -0x7008) +#endif + +#define POWERPC_LINUX + +/* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later. */ +#ifdef TARGET_DEFAULT_LONG_DOUBLE_128 +#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 +#endif + +/* 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) + +/* Software floating point support for exceptions and rounding modes + depends on the C library in use. */ +#undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P +#define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \ + rs6000_linux_float_exceptions_rounding_supported_p |