| /* Definitions of target machine for GNU compiler, |
| for IBM RS/6000 POWER running AIX. |
| Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
| 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 2, or (at your |
| option) any later version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the |
| Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| /* Yes! We are AIX! */ |
| #define DEFAULT_ABI ABI_AIX |
| #undef TARGET_AIX |
| #define TARGET_AIX 1 |
| |
| /* AIX always has a TOC. */ |
| #define TARGET_NO_TOC 0 |
| #define TARGET_TOC 1 |
| #define FIXED_R2 1 |
| |
| /* AIX allows r13 to be used in 32-bit mode. */ |
| #define FIXED_R13 0 |
| |
| /* 32-bit and 64-bit AIX stack boundary is 128. */ |
| #undef STACK_BOUNDARY |
| #define STACK_BOUNDARY 128 |
| |
| /* AIX does not support Altivec. */ |
| #undef TARGET_ALTIVEC |
| #define TARGET_ALTIVEC 0 |
| #undef TARGET_ALTIVEC_ABI |
| #define TARGET_ALTIVEC_ABI 0 |
| #undef TARGET_IEEEQUAD |
| #define TARGET_IEEEQUAD 0 |
| |
| /* The AIX linker will discard static constructors in object files before |
| collect has a chance to see them, so scan the object files directly. */ |
| #define COLLECT_EXPORT_LIST |
| |
| /* Handle #pragma weak and #pragma pack. */ |
| #define HANDLE_SYSV_PRAGMA 1 |
| |
| /* This is the only version of nm that collect2 can work with. */ |
| #define REAL_NM_FILE_NAME "/usr/ucb/nm" |
| |
| #define USER_LABEL_PREFIX "" |
| |
| /* Don't turn -B into -L if the argument specifies a relative file name. */ |
| #define RELATIVE_PREFIX_NOT_LINKDIR |
| |
| /* Because of the above, we must have gcc search itself to find libgcc.a. */ |
| #define LINK_LIBGCC_SPECIAL_1 |
| |
| #define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \ |
| -brename:malloc,__wrap_malloc -brename:__real_malloc,malloc \ |
| -brename:free,__wrap_free -brename:__real_free,free \ |
| -brename:calloc,__wrap_calloc -brename:__real_calloc,calloc \ |
| -brename:realloc,__wrap_realloc -brename:__real_realloc,realloc \ |
| -brename:mmap,__wrap_mmap -brename:__real_mmap,mmap \ |
| -brename:munmap,__wrap_munmap -brename:__real_munmap,munmap \ |
| -brename:alloca,__wrap_alloca -brename:__real_alloca,alloca \ |
| } %{fmudflapth: \ |
| -brename:pthread_create,__wrap_pthread_create \ |
| -brename:__real_pthread_create,pthread_create \ |
| -brename:pthread_join,__wrap_pthread_join \ |
| -brename:__real_pthread_join,pthread_join \ |
| -brename:pthread_exit,__wrap_pthread_exit \ |
| -brename:__real_pthread_exit,pthread_exit \ |
| }} %{fmudflap|fmudflapth: \ |
| -brename:main,__wrap_main -brename:__real_main,main \ |
| }" |
| |
| #define MFLIB_SPEC " %{fmudflap: -lmudflap \ |
| %{static:%(link_gcc_c_sequence) -lmudflap}} \ |
| %{fmudflapth: -lmudflapth -lpthread \ |
| %{static:%(link_gcc_c_sequence) -lmudflapth}} " |
| |
| /* Names to predefine in the preprocessor for this target machine. */ |
| #define TARGET_OS_AIX_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("_IBMR2"); \ |
| builtin_define ("_POWER"); \ |
| builtin_define ("_AIX"); \ |
| builtin_define ("_AIX32"); \ |
| builtin_define ("_AIX41"); \ |
| builtin_define ("_LONG_LONG"); \ |
| if (TARGET_LONG_DOUBLE_128) \ |
| builtin_define ("__LONGDOUBLE128"); \ |
| builtin_assert ("system=unix"); \ |
| builtin_assert ("system=aix"); \ |
| } \ |
| while (0) |
| |
| /* Define appropriate architecture macros for preprocessor depending on |
| target switches. */ |
| |
| #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\ |
| %{ansi: -D_ANSI_C_SOURCE}" |
| |
| #undef ASM_DEFAULT_SPEC |
| #define ASM_DEFAULT_SPEC "" |
| |
| /* Tell the assembler to assume that all undefined names are external. |
| |
| Don't do this until the fixed IBM assembler is more generally available. |
| When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL, |
| ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no |
| longer be needed. Also, the extern declaration of mcount in |
| rs6000_xcoff_file_start will no longer be needed. */ |
| |
| /* #define ASM_SPEC "-u %(asm_cpu)" */ |
| |
| /* Default location of syscalls.exp under AIX */ |
| /* APPLE LOCAL begin mainline 4.3 2006-12-13 CROSS_DIRECTORY_STRUCTURE 4697325 */ |
| #ifndef CROSS_DIRECTORY_STRUCTURE |
| /* APPLE LOCAL end mainline 4.3 2006-12-13 CROSS_DIRECTORY_STRUCTURE 4697325 */ |
| #define LINK_SYSCALLS_SPEC "-bI:/lib/syscalls.exp" |
| #else |
| #define LINK_SYSCALLS_SPEC "" |
| #endif |
| |
| /* Default location of libg.exp under AIX */ |
| /* APPLE LOCAL begin mainline 4.3 2006-12-13 CROSS_DIRECTORY_STRUCTURE 4697325 */ |
| #ifndef CROSS_DIRECTORY_STRUCTURE |
| /* APPLE LOCAL end mainline 4.3 2006-12-13 CROSS_DIRECTORY_STRUCTURE 4697325 */ |
| #define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp" |
| #else |
| #define LINK_LIBG_SPEC "" |
| #endif |
| |
| /* Define the options for the binder: Start text at 512, align all segments |
| to 512 bytes, and warn if there is text relocation. |
| |
| The -bhalt:4 option supposedly changes the level at which ld will abort, |
| but it also suppresses warnings about multiply defined symbols and is |
| used by the AIX cc command. So we use it here. |
| |
| -bnodelcsect undoes a poor choice of default relating to multiply-defined |
| csects. See AIX documentation for more information about this. |
| |
| -bM:SRE tells the linker that the output file is Shared REusable. Note |
| that to actually build a shared library you will also need to specify an |
| export list with the -Wl,-bE option. */ |
| |
| #define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\ |
| %{static:-bnso %(link_syscalls) } \ |
| %{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}" |
| |
| /* Profiled library versions are used by linking with special directories. */ |
| #define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\ |
| %{p:-L/lib/profiled -L/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc" |
| |
| /* This now supports a natural alignment mode. */ |
| /* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints. */ |
| #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ |
| (TARGET_ALIGN_NATURAL ? (COMPUTED) : \ |
| (TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \ |
| ? get_inner_array_type (FIELD) \ |
| : TREE_TYPE (FIELD)) == DFmode \ |
| ? MIN ((COMPUTED), 32) : (COMPUTED))) |
| |
| /* AIX increases natural record alignment to doubleword if the first |
| field is an FP double while the FP fields remain word aligned. */ |
| #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ |
| ((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))) |
| |
| /* The AIX ABI isn't explicit on whether aggregates smaller than a |
| word/doubleword should be padded upward or downward. One 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, which |
| is the way IBM Compilers for AIX behave. |
| Setting both of the following defines results in this behavior. */ |
| #define AGGREGATE_PADDING_FIXED 1 |
| #define AGGREGATES_PAD_UPWARD_ALWAYS 1 |
| |
| /* 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)) |
| |
| /* Indicate that jump tables go in the text section. */ |
| |
| #define JUMP_TABLES_IN_TEXT_SECTION 1 |
| |
| /* Define any extra SPECS that the compiler needs to generate. */ |
| #undef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS \ |
| { "link_syscalls", LINK_SYSCALLS_SPEC }, \ |
| { "link_libg", LINK_LIBG_SPEC } |
| |
| /* Define cutoff for using external functions to save floating point. */ |
| #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63) |
| |
| /* __throw will restore its own return address to be the same as the |
| return address of the function that the throw is being made to. |
| This is unfortunate, because we want to check the original |
| return address to see if we need to restore the TOC. |
| So we have to squirrel it away with this. */ |
| #define SETUP_FRAME_ADDRESSES() rs6000_aix_emit_builtin_unwind_init () |
| |
| /* If the current unwind info (FS) does not contain explicit info |
| saving R2, then we have to do a minor amount of code reading to |
| figure out if it was saved. The big problem here is that the |
| code that does the save/restore is generated by the linker, so |
| we have no good way to determine at compile time what to do. */ |
| |
| #ifdef __64BIT__ |
| #define MD_FROB_UPDATE_CONTEXT(CTX, FS) \ |
| do { \ |
| if ((FS)->regs.reg[2].how == REG_UNSAVED) \ |
| { \ |
| unsigned int *insn \ |
| = (unsigned int *) \ |
| _Unwind_GetGR ((CTX), LINK_REGISTER_REGNUM); \ |
| if (*insn == 0xE8410028) \ |
| _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40); \ |
| } \ |
| } while (0) |
| #else |
| #define MD_FROB_UPDATE_CONTEXT(CTX, FS) \ |
| do { \ |
| if ((FS)->regs.reg[2].how == REG_UNSAVED) \ |
| { \ |
| unsigned int *insn \ |
| = (unsigned int *) \ |
| _Unwind_GetGR ((CTX), LINK_REGISTER_REGNUM); \ |
| if (*insn == 0x80410014) \ |
| _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20); \ |
| } \ |
| } while (0) |
| #endif |
| |
| #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL) |
| |
| /* Print subsidiary information on the compiler version in use. */ |
| #define TARGET_VERSION ; |
| |
| /* No version of AIX fully supports AltiVec or 64-bit instructions in |
| 32-bit mode. */ |
| #define OS_MISSING_POWERPC64 1 |
| #define OS_MISSING_ALTIVEC 1 |
| |
| /* WINT_TYPE */ |
| #define WINT_TYPE "int" |
