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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [rs6000/] [aix.h] - Blame information for rev 282

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1 282 jeremybenn
/* 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, 2008, 2010
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   Free Software Foundation, Inc.
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   This file is part of GCC.
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8
   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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13
   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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#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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#if HAVE_AS_REF
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/* Issue assembly directives that create a reference to the given DWARF table
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   identifier label from the current function section.  This is defined to
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   ensure we drag frame frame tables associated with needed function bodies in
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   a link with garbage collection activated.  */
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#define ASM_OUTPUT_DWARF_TABLE_REF rs6000_aix_asm_output_dwarf_table_ref
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#endif
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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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109
/* Define appropriate architecture macros for preprocessor depending on
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   target switches.  */
111
 
112
#define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\
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   %{ansi: -D_ANSI_C_SOURCE}"
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115
#define CC1_SPEC "%(cc1_cpu)"
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117
#undef ASM_DEFAULT_SPEC
118
#define ASM_DEFAULT_SPEC ""
119
 
120
/* Tell the assembler to assume that all undefined names are external.
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122
   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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128
/* #define ASM_SPEC "-u %(asm_cpu)" */
129
 
130
/* Default location of syscalls.exp under AIX */
131
#define LINK_SYSCALLS_SPEC "-bI:%R/lib/syscalls.exp"
132
 
133
/* Default location of libg.exp under AIX */
134
#define LINK_LIBG_SPEC "-bexport:%R/usr/lib/libg.exp"
135
 
136
/* Define the options for the binder: Start text at 512, align all segments
137
   to 512 bytes, and warn if there is text relocation.
138
 
139
   The -bhalt:4 option supposedly changes the level at which ld will abort,
140
   but it also suppresses warnings about multiply defined symbols and is
141
   used by the AIX cc command.  So we use it here.
142
 
143
   -bnodelcsect undoes a poor choice of default relating to multiply-defined
144
   csects.  See AIX documentation for more information about this.
145
 
146
   -bM:SRE tells the linker that the output file is Shared REusable.  Note
147
   that to actually build a shared library you will also need to specify an
148
   export list with the -Wl,-bE option.  */
149
 
150
#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}"
153
 
154
/* Profiled library versions are used by linking with special directories.  */
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#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
156
%{p:-L%R/lib/profiled -L%R/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
157
 
158
/* Static linking with shared libstdc++ requires libsupc++ as well.  */
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#define LIBSTDCXX_STATIC "-lsupc++"
160
 
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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 == 0                                           \
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    && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode)     \
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   ? MIN ((COMPUTED), 32)                                               \
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   : (COMPUTED))
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169
/* AIX increases natural record alignment to doubleword if the first
170
   field is an FP double while the FP fields remain word aligned.  */
171
#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
181
   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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189
/* 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.  */
192
#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
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  (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
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195
/* Indicate that jump tables go in the text section.  */
196
 
197
#define JUMP_TABLES_IN_TEXT_SECTION 1
198
 
199
/* Define any extra SPECS that the compiler needs to generate.  */
200
#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 }
204
 
205
/* Define cutoff for using external functions to save floating point.  */
206
#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63)
207
/* And similarly for general purpose registers.  */
208
#define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
209
 
210
/* __throw will restore its own return address to be the same as the
211
   return address of the function that the throw is being made to.
212
   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.
214
   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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217
/* 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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223
#define R_LR 65
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225
#ifdef __64BIT__
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#define MD_FROB_UPDATE_CONTEXT(CTX, FS)                                 \
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  do {                                                                  \
228
    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), R_LR);                                \
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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 {                                                                  \
240
    if ((FS)->regs.reg[2].how == REG_UNSAVED)                           \
241
      {                                                                 \
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        unsigned int *insn                                              \
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          = (unsigned int *)                                            \
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            _Unwind_GetGR ((CTX), R_LR);                                \
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        if (*insn == 0x80410014)                                        \
246
          _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20);                 \
247
      }                                                                 \
248
  } while (0)
249
#endif
250
 
251
#define PROFILE_HOOK(LABEL)   output_profile_hook (LABEL)
252
 
253
/* Print subsidiary information on the compiler version in use.  */
254
#define TARGET_VERSION ;
255
 
256
/* No version of AIX fully supports AltiVec or 64-bit instructions in
257
   32-bit mode.  */
258
#define OS_MISSING_POWERPC64 1
259
#define OS_MISSING_ALTIVEC 1
260
 
261
/* WINT_TYPE */
262
#define WINT_TYPE "int"

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