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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [config/] [rs6000/] [aix.h] - Blame information for rev 38

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1 38 julius
/* Definitions of target machine for GNU compiler,
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   for IBM RS/6000 POWER running AIX.
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   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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   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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/* Yes!  We are AIX!  */
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#define DEFAULT_ABI ABI_AIX
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#undef  TARGET_AIX
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#define TARGET_AIX 1
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/* AIX always has a TOC.  */
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#define TARGET_NO_TOC 0
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#define TARGET_TOC 1
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#define FIXED_R2 1
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/* AIX allows r13 to be used in 32-bit mode.  */
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#define FIXED_R13 0
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/* 32-bit and 64-bit AIX stack boundary is 128.  */
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#undef  STACK_BOUNDARY
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#define STACK_BOUNDARY 128
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/* AIX does not support Altivec.  */
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#undef  TARGET_ALTIVEC
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#define TARGET_ALTIVEC 0
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#undef  TARGET_ALTIVEC_ABI
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#define TARGET_ALTIVEC_ABI 0
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#undef  TARGET_IEEEQUAD
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#define TARGET_IEEEQUAD 0
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/* The AIX linker will discard static constructors in object files before
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   collect has a chance to see them, so scan the object files directly.  */
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#define COLLECT_EXPORT_LIST
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/* Handle #pragma weak and #pragma pack.  */
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#define HANDLE_SYSV_PRAGMA 1
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/* This is the only version of nm that collect2 can work with.  */
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#define REAL_NM_FILE_NAME "/usr/ucb/nm"
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#define USER_LABEL_PREFIX  ""
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/* Don't turn -B into -L if the argument specifies a relative file name.  */
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#define RELATIVE_PREFIX_NOT_LINKDIR
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/* Because of the above, we must have gcc search itself to find libgcc.a.  */
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#define LINK_LIBGCC_SPECIAL_1
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#define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \
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 -brename:malloc,__wrap_malloc -brename:__real_malloc,malloc \
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 -brename:free,__wrap_free -brename:__real_free,free \
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 -brename:calloc,__wrap_calloc -brename:__real_calloc,calloc \
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 -brename:realloc,__wrap_realloc -brename:__real_realloc,realloc \
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 -brename:mmap,__wrap_mmap -brename:__real_mmap,mmap \
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 -brename:munmap,__wrap_munmap -brename:__real_munmap,munmap \
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 -brename:alloca,__wrap_alloca -brename:__real_alloca,alloca \
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} %{fmudflapth: \
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 -brename:pthread_create,__wrap_pthread_create \
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 -brename:__real_pthread_create,pthread_create \
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 -brename:pthread_join,__wrap_pthread_join \
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 -brename:__real_pthread_join,pthread_join \
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 -brename:pthread_exit,__wrap_pthread_exit \
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 -brename:__real_pthread_exit,pthread_exit \
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}} %{fmudflap|fmudflapth: \
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 -brename:main,__wrap_main -brename:__real_main,main \
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}"
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#define MFLIB_SPEC " %{fmudflap: -lmudflap \
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 %{static:%(link_gcc_c_sequence) -lmudflap}} \
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 %{fmudflapth: -lmudflapth -lpthread \
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 %{static:%(link_gcc_c_sequence) -lmudflapth}} "
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/* Names to predefine in the preprocessor for this target machine.  */
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#define TARGET_OS_AIX_CPP_BUILTINS()            \
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  do                                            \
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    {                                           \
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      builtin_define ("_IBMR2");                \
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      builtin_define ("_POWER");                \
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      builtin_define ("_AIX");                  \
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      builtin_define ("_AIX32");                \
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      builtin_define ("_AIX41");                \
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      builtin_define ("_LONG_LONG");            \
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      if (TARGET_LONG_DOUBLE_128)               \
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        builtin_define ("__LONGDOUBLE128");     \
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      builtin_assert ("system=unix");           \
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      builtin_assert ("system=aix");            \
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    }                                           \
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  while (0)
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/* Define appropriate architecture macros for preprocessor depending on
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   target switches.  */
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#define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\
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   %{ansi: -D_ANSI_C_SOURCE}"
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#undef ASM_DEFAULT_SPEC
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#define ASM_DEFAULT_SPEC ""
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/* Tell the assembler to assume that all undefined names are external.
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   Don't do this until the fixed IBM assembler is more generally available.
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   When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
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   ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
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   longer be needed.  Also, the extern declaration of mcount in
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   rs6000_xcoff_file_start will no longer be needed.  */
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/* #define ASM_SPEC "-u %(asm_cpu)" */
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/* Default location of syscalls.exp under AIX */
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#ifndef CROSS_COMPILE
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#define LINK_SYSCALLS_SPEC "-bI:/lib/syscalls.exp"
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#else
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#define LINK_SYSCALLS_SPEC ""
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#endif
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/* Default location of libg.exp under AIX */
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#ifndef CROSS_COMPILE
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#define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp"
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#else
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#define LINK_LIBG_SPEC ""
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#endif
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/* Define the options for the binder: Start text at 512, align all segments
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   to 512 bytes, and warn if there is text relocation.
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   The -bhalt:4 option supposedly changes the level at which ld will abort,
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   but it also suppresses warnings about multiply defined symbols and is
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   used by the AIX cc command.  So we use it here.
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146
   -bnodelcsect undoes a poor choice of default relating to multiply-defined
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   csects.  See AIX documentation for more information about this.
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   -bM:SRE tells the linker that the output file is Shared REusable.  Note
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   that to actually build a shared library you will also need to specify an
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   export list with the -Wl,-bE option.  */
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#define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\
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%{static:-bnso %(link_syscalls) } \
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%{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}"
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/* Profiled library versions are used by linking with special directories.  */
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#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
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%{p:-L/lib/profiled -L/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
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/* This now supports a natural alignment mode.  */
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/* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints.  */
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#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
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  (TARGET_ALIGN_NATURAL ? (COMPUTED) : \
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  (TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \
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              ? get_inner_array_type (FIELD) \
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              : TREE_TYPE (FIELD)) == DFmode \
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   ? MIN ((COMPUTED), 32) : (COMPUTED)))
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/* AIX increases natural record alignment to doubleword if the first
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   field is an FP double while the FP fields remain word aligned.  */
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#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED)                   \
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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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/* The AIX ABI isn't explicit on whether aggregates smaller than a
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   word/doubleword should be padded upward or downward.  One 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, which
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   is the way IBM Compilers for AIX behave.
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   Setting both of the following defines results in this behavior.  */
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#define AGGREGATE_PADDING_FIXED 1
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#define AGGREGATES_PAD_UPWARD_ALWAYS 1
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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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/* Indicate that jump tables go in the text section.  */
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#define JUMP_TABLES_IN_TEXT_SECTION 1
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200
/* Define any extra SPECS that the compiler needs to generate.  */
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#undef  SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS                                           \
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  { "link_syscalls",            LINK_SYSCALLS_SPEC },                   \
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  { "link_libg",                LINK_LIBG_SPEC }
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206
/* Define cutoff for using external functions to save floating point.  */
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#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63)
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/* __throw will restore its own return address to be the same as the
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   return address of the function that the throw is being made to.
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   This is unfortunate, because we want to check the original
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   return address to see if we need to restore the TOC.
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   So we have to squirrel it away with this.  */
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#define SETUP_FRAME_ADDRESSES() rs6000_aix_emit_builtin_unwind_init ()
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/* If the current unwind info (FS) does not contain explicit info
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   saving R2, then we have to do a minor amount of code reading to
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   figure out if it was saved.  The big problem here is that the
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   code that does the save/restore is generated by the linker, so
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   we have no good way to determine at compile time what to do.  */
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#ifdef __64BIT__
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#define MD_FROB_UPDATE_CONTEXT(CTX, FS)                                 \
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  do {                                                                  \
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    if ((FS)->regs.reg[2].how == REG_UNSAVED)                           \
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      {                                                                 \
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        unsigned int *insn                                              \
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          = (unsigned int *)                                            \
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            _Unwind_GetGR ((CTX), LINK_REGISTER_REGNUM);                \
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        if (*insn == 0xE8410028)                                        \
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          _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40);                 \
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      }                                                                 \
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  } while (0)
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#else
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#define MD_FROB_UPDATE_CONTEXT(CTX, FS)                                 \
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  do {                                                                  \
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    if ((FS)->regs.reg[2].how == REG_UNSAVED)                           \
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      {                                                                 \
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        unsigned int *insn                                              \
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          = (unsigned int *)                                            \
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            _Unwind_GetGR ((CTX), LINK_REGISTER_REGNUM);                \
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        if (*insn == 0x80410014)                                        \
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          _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20);                 \
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      }                                                                 \
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  } while (0)
246
#endif
247
 
248
#define PROFILE_HOOK(LABEL)   output_profile_hook (LABEL)
249
 
250
/* Print subsidiary information on the compiler version in use.  */
251
#define TARGET_VERSION ;
252
 
253
/* No version of AIX fully supports AltiVec or 64-bit instructions in
254
   32-bit mode.  */
255
#define OS_MISSING_POWERPC64 1
256
#define OS_MISSING_ALTIVEC 1
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258
/* WINT_TYPE */
259
#define WINT_TYPE "int"

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