+// SPDX-License-Identifier: GPL-3.0-or-later
/* Definitions of target machine for GNU compiler,
for IBM RS/6000 POWER running AIX.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2023 Free Software Foundation, Inc.
This file is part of GCC.
#undef TARGET_AIX
#define TARGET_AIX 1
+/* Linux64.h wants to redefine TARGET_AIX based on -m64, but it can't be used
+ in the #if conditional in options-default.h, so provide another macro. */
+#undef TARGET_AIX_OS
+#define TARGET_AIX_OS 1
+
/* AIX always has a TOC. */
-#define TARGET_NO_TOC 0
-#define TARGET_TOC 1
+#define TARGET_HAS_TOC 1
#define FIXED_R2 1
/* AIX allows r13 to be used in 32-bit mode. */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 128
+/* Offset within stack frame to start allocating local variables at.
+ If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
+ first local allocated. Otherwise, it is the offset to the BEGINNING
+ of the first local allocated.
+
+ On the RS/6000, the frame pointer is the same as the stack pointer,
+ except for dynamic allocations. So we start after the fixed area and
+ outgoing parameter area.
+
+ If the function uses dynamic stack space (CALLS_ALLOCA is set), that
+ space needs to be aligned to STACK_BOUNDARY, i.e. the sum of the
+ sizes of the fixed area and the parameter area must be a multiple of
+ STACK_BOUNDARY. */
+
+#undef RS6000_STARTING_FRAME_OFFSET
+#define RS6000_STARTING_FRAME_OFFSET \
+ (cfun->calls_alloca \
+ ? RS6000_ALIGN (crtl->outgoing_args_size + RS6000_SAVE_AREA, 16) \
+ : (RS6000_ALIGN (crtl->outgoing_args_size, 16) + RS6000_SAVE_AREA))
+
+/* Offset from the stack pointer register to an item dynamically
+ allocated on the stack, e.g., by `alloca'.
+
+ The default value for this macro is `STACK_POINTER_OFFSET' plus the
+ length of the outgoing arguments. The default is correct for most
+ machines. See `function.cc' for details.
+
+ This value must be a multiple of STACK_BOUNDARY (hard coded in
+ `emit-rtl.cc'). */
+#undef STACK_DYNAMIC_OFFSET
+#define STACK_DYNAMIC_OFFSET(FUNDECL) \
+ RS6000_ALIGN (crtl->outgoing_args_size.to_constant () \
+ + STACK_POINTER_OFFSET, 16)
+
#undef TARGET_IEEEQUAD
#define TARGET_IEEEQUAD 0
+#undef TARGET_IEEEQUAD_DEFAULT
+#define TARGET_IEEEQUAD_DEFAULT 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
+/* On AIX, initialisers specified with -binitfini are called in breadth-first
+ order.
+ e.g. if a.out depends on lib1.so, the init function for a.out is called before
+ the init function for lib1.so.
+
+ To ensure global C++ constructors in linked libraries are run before global
+ C++ constructors from the current module, there is additional symbol scanning
+ logic in collect2.
+
+ The global initialiser/finaliser functions are named __GLOBAL_AIXI_{libname}
+ and __GLOBAL_AIXD_{libname} and are exported from each shared library.
+
+ collect2 will detect these symbols when they exist in shared libraries that
+ the current program is being linked against. All such initiliser functions
+ will be called prior to the constructors of the current program, and
+ finaliser functions called after destructors.
+
+ Reference counting generated by collect2 will ensure that constructors are
+ only invoked once in the case of multiple dependencies on a library.
+
+ -binitfini is still used in parallel to this solution.
+ This handles the case where a library is loaded through dlopen(), and also
+ handles the option -blazy.
+*/
+#define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
+ fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_initname, (FUNC))
+#define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
+ fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_fininame, (FUNC))
+
+#if HAVE_AS_REF
+/* Issue assembly directives that create a reference to the given DWARF table
+ identifier label from the current function section. This is defined to
+ ensure we drag frame tables associated with needed function bodies in
+ a link with garbage collection activated. */
+#define ASM_OUTPUT_DWARF_TABLE_REF rs6000_aix_asm_output_dwarf_table_ref
+#endif
/* This is the only version of nm that collect2 can work with. */
#define REAL_NM_FILE_NAME "/usr/ucb/nm"
/* 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 ("__unix__"); \
builtin_define ("_AIX"); \
builtin_define ("_AIX32"); \
builtin_define ("_AIX41"); \
builtin_define ("__LONGDOUBLE128"); \
builtin_assert ("system=unix"); \
builtin_assert ("system=aix"); \
+ if (TARGET_64BIT) \
+ { \
+ builtin_define ("__PPC__"); \
+ builtin_define ("__PPC64__"); \
+ builtin_define ("__powerpc__"); \
+ builtin_define ("__powerpc64__"); \
+ builtin_assert ("cpu=powerpc64"); \
+ builtin_assert ("machine=powerpc64"); \
+ } \
+ else \
+ { \
+ builtin_define ("__PPC__"); \
+ builtin_define ("__powerpc__"); \
+ builtin_assert ("cpu=powerpc"); \
+ builtin_assert ("machine=powerpc"); \
+ } \
} \
while (0)
%{p:-L%R/lib/profiled -L%R/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
/* Static linking with shared libstdc++ requires libsupc++ as well. */
-#define LIBSTDCXX_STATIC "-lstdc++ -lsupc++"
+#define LIBSTDCXX_STATIC "supc++"
/* 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 == 0 \
- && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \
- ? MIN ((COMPUTED), 32) \
+#define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
+ (TARGET_ALIGN_NATURAL == 0 \
+ ? rs6000_special_adjust_field_align (TYPE, COMPUTED) \
: (COMPUTED))
/* AIX increases natural record alignment to doubleword if the first
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))
+ (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE))
/* Indicate that jump tables go in the text section. */
{ "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)
-/* And similarly for general purpose registers. */
-#define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
-
-/* __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. */
-
-#define R_LR 65
-
-#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), R_LR); \
- 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), R_LR); \
- 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
/* WINT_TYPE */
#define WINT_TYPE "int"
+
+/* Static stack checking is supported by means of probes. */
+#define STACK_CHECK_STATIC_BUILTIN 1
+
+/* Use standard DWARF numbering for DWARF debugging information. */
+#define RS6000_USE_DWARF_NUMBERING
+
+#define TARGET_PRECOMPUTE_TLS_P rs6000_aix_precompute_tls_p
+
+/* Replace -m64 with -maix64 and -m32 with -maix32. */
+#undef SUBTARGET_DRIVER_SELF_SPECS
+#define SUBTARGET_DRIVER_SELF_SPECS \
+"%{m64:-maix64} %<m64", \
+"%{m32:-maix32} %<m32"
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