(root)/
gcc-13.2.0/
gcc/
config/
rs6000/
sysv4.h
       1  /* Target definitions for GNU compiler for PowerPC running System V.4
       2     Copyright (C) 1995-2023 Free Software Foundation, Inc.
       3     Contributed by Cygnus Support.
       4  
       5     This file is part of GCC.
       6  
       7     GCC is free software; you can redistribute it and/or modify it
       8     under the terms of the GNU General Public License as published
       9     by the Free Software Foundation; either version 3, or (at your
      10     option) any later version.
      11  
      12     GCC is distributed in the hope that it will be useful, but WITHOUT
      13     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      14     or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
      15     License for more details.
      16  
      17     Under Section 7 of GPL version 3, you are granted additional
      18     permissions described in the GCC Runtime Library Exception, version
      19     3.1, as published by the Free Software Foundation.
      20  
      21     You should have received a copy of the GNU General Public License and
      22     a copy of the GCC Runtime Library Exception along with this program;
      23     see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24     <http://www.gnu.org/licenses/>.  */
      25  
      26  #undef GNU_USER_TARGET_CRTI
      27  #define GNU_USER_TARGET_CRTI "%{mnewlib:ecrti.o%s;:crti.o%s}"
      28  #undef GNU_USER_TARGET_CRTN
      29  #define GNU_USER_TARGET_CRTN "%{mnewlib:ecrtn.o%s;:crtn.o%s}"
      30  
      31  /* Yes!  We are ELF.  */
      32  #define	TARGET_OBJECT_FORMAT OBJECT_ELF
      33  
      34  /* Default ABI to compile code for.  */
      35  #define DEFAULT_ABI rs6000_current_abi
      36  
      37  /* Default ABI to use.  */
      38  #define RS6000_ABI_NAME "sysv"
      39  
      40  /* Override rs6000.h definition.  */
      41  #undef	ASM_DEFAULT_SPEC
      42  #define	ASM_DEFAULT_SPEC "-mppc%{m64:64}"
      43  
      44  #define	TARGET_HAS_TOC		(TARGET_64BIT				\
      45  				 || (TARGET_MINIMAL_TOC			\
      46  				     && flag_pic > 1)			\
      47  				 || DEFAULT_ABI != ABI_V4)
      48  
      49  #define	TARGET_BITFIELD_TYPE	(! TARGET_NO_BITFIELD_TYPE)
      50  #define	TARGET_BIG_ENDIAN	(! TARGET_LITTLE_ENDIAN)
      51  #define	TARGET_PROTOTYPE	target_prototype
      52  #define	TARGET_NO_PROTOTYPE	(! TARGET_PROTOTYPE)
      53  #define	TARGET_NO_EABI		(! TARGET_EABI)
      54  #define	TARGET_REGNAMES		rs6000_regnames
      55  
      56  #ifdef HAVE_AS_REL16
      57  #undef TARGET_SECURE_PLT
      58  #define TARGET_SECURE_PLT	secure_plt
      59  #endif
      60  
      61  #if HAVE_AS_PLTSEQ
      62  #undef TARGET_PLTSEQ
      63  #define TARGET_PLTSEQ rs6000_pltseq
      64  #endif
      65  
      66  #define SDATA_DEFAULT_SIZE 8
      67  
      68  /* The macro SUBTARGET_OVERRIDE_OPTIONS is provided for subtargets, to
      69     get control in TARGET_OPTION_OVERRIDE.  */
      70  
      71  #define SUBTARGET_OVERRIDE_OPTIONS					\
      72  do {									\
      73    if (!OPTION_SET_P (g_switch_value))				\
      74      g_switch_value = SDATA_DEFAULT_SIZE;				\
      75  									\
      76    if (rs6000_abi_name == NULL)						\
      77      rs6000_abi_name = RS6000_ABI_NAME;					\
      78  									\
      79    if (!strcmp (rs6000_abi_name, "sysv"))				\
      80      rs6000_current_abi = ABI_V4;					\
      81    else if (!strcmp (rs6000_abi_name, "sysv-noeabi"))			\
      82      {									\
      83        rs6000_current_abi = ABI_V4;					\
      84        rs6000_isa_flags &= ~ OPTION_MASK_EABI;				\
      85      }									\
      86    else if (!strcmp (rs6000_abi_name, "sysv-eabi")			\
      87  	   || !strcmp (rs6000_abi_name, "eabi"))			\
      88      {									\
      89        rs6000_current_abi = ABI_V4;					\
      90        rs6000_isa_flags |= OPTION_MASK_EABI;				\
      91      }									\
      92    else if (!strcmp (rs6000_abi_name, "aixdesc"))			\
      93      rs6000_current_abi = ABI_AIX;					\
      94    else if (!strcmp (rs6000_abi_name, "freebsd")				\
      95  	   || !strcmp (rs6000_abi_name, "linux"))			\
      96      {									\
      97        if (TARGET_64BIT)							\
      98  	rs6000_current_abi = ABI_AIX;					\
      99        else								\
     100  	rs6000_current_abi = ABI_V4;					\
     101      }									\
     102    else if (!strcmp (rs6000_abi_name, "netbsd"))				\
     103      rs6000_current_abi = ABI_V4;					\
     104    else if (!strcmp (rs6000_abi_name, "openbsd"))			\
     105      rs6000_current_abi = ABI_V4;					\
     106    else if (!strcmp (rs6000_abi_name, "i960-old"))			\
     107      {									\
     108        rs6000_current_abi = ABI_V4;					\
     109        rs6000_isa_flags |= (OPTION_MASK_LITTLE_ENDIAN | OPTION_MASK_EABI); \
     110        rs6000_isa_flags &= ~OPTION_MASK_STRICT_ALIGN;			\
     111        TARGET_NO_BITFIELD_WORD = 1;					\
     112      }									\
     113    else									\
     114      {									\
     115        rs6000_current_abi = ABI_V4;					\
     116        error ("bad value for %<%s-%s%>", "-mcall", rs6000_abi_name);	\
     117      }									\
     118  									\
     119    if (rs6000_sdata_name)						\
     120      {									\
     121        if (!strcmp (rs6000_sdata_name, "none"))				\
     122  	rs6000_sdata = SDATA_NONE;					\
     123        else if (!strcmp (rs6000_sdata_name, "data"))			\
     124  	rs6000_sdata = SDATA_DATA;					\
     125        else if (!strcmp (rs6000_sdata_name, "default"))			\
     126  	rs6000_sdata = (TARGET_EABI) ? SDATA_EABI : SDATA_SYSV;		\
     127        else if (!strcmp (rs6000_sdata_name, "sysv"))			\
     128  	rs6000_sdata = SDATA_SYSV;					\
     129        else if (!strcmp (rs6000_sdata_name, "eabi"))			\
     130  	rs6000_sdata = SDATA_EABI;					\
     131        else								\
     132  	error ("bad value for %<%s=%s%>", "-msdata", rs6000_sdata_name);\
     133      }									\
     134    else if (DEFAULT_ABI == ABI_V4)					\
     135      {									\
     136        rs6000_sdata = SDATA_DATA;					\
     137        rs6000_sdata_name = "data";					\
     138      }									\
     139    else									\
     140      {									\
     141        rs6000_sdata = SDATA_NONE;					\
     142        rs6000_sdata_name = "none";					\
     143      }									\
     144  									\
     145    if (TARGET_RELOCATABLE &&						\
     146        (rs6000_sdata == SDATA_EABI || rs6000_sdata == SDATA_SYSV))	\
     147      {									\
     148        rs6000_sdata = SDATA_DATA;					\
     149        error ("%qs and %<%s=%s%> are incompatible", rs6000_sdata_name,	\
     150  	     "-mrelocatable", "-msdata");				\
     151      }									\
     152  									\
     153    else if (flag_pic && DEFAULT_ABI == ABI_V4				\
     154  	   && (rs6000_sdata == SDATA_EABI				\
     155  	       || rs6000_sdata == SDATA_SYSV))				\
     156      {									\
     157        rs6000_sdata = SDATA_DATA;					\
     158        error ("%<-f%s%> and %<%s=%s%> are incompatible",			\
     159  	     (flag_pic > 1) ? "PIC" : "pic",				\
     160  	     "-msdata", rs6000_sdata_name);				\
     161      }									\
     162  									\
     163    if ((rs6000_sdata != SDATA_NONE && DEFAULT_ABI != ABI_V4)		\
     164        || (rs6000_sdata == SDATA_EABI && !TARGET_EABI))			\
     165      {									\
     166        rs6000_sdata = SDATA_NONE;					\
     167        error ("%<%s=%s%> and %<%s-%s%> are incompatible",		\
     168  	     "-msdata", rs6000_sdata_name, "-mcall", rs6000_abi_name);	\
     169      }									\
     170  									\
     171    targetm.have_srodata_section = rs6000_sdata == SDATA_EABI;		\
     172  									\
     173    if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC)			\
     174      {									\
     175        rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;			\
     176        error ("%qs and %qs are incompatible", "-mrelocatable",		\
     177  	     "-mno-minimal-toc");					\
     178      }									\
     179  									\
     180    if (TARGET_RELOCATABLE && rs6000_current_abi != ABI_V4)		\
     181      {									\
     182        rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE;			\
     183        error ("%qs and %<%s-%s%> are incompatible",			\
     184  	     "-mrelocatable", "-mcall", rs6000_abi_name);		\
     185      }									\
     186  									\
     187    if (!TARGET_64BIT && flag_pic > 1 && rs6000_current_abi != ABI_V4)	\
     188      {									\
     189        flag_pic = 0;							\
     190        error ("%qs and %<%s-%s%> are incompatible",			\
     191  	     "-fPIC", "-mcall", rs6000_abi_name);			\
     192      }									\
     193  									\
     194    if (TARGET_SECURE_PLT != secure_plt)					\
     195      {									\
     196        error ("%qs not supported by your assembler", "-msecure-plt");	\
     197      }									\
     198  									\
     199    if (TARGET_PLTSEQ != rs6000_pltseq					\
     200        && OPTION_SET_P (rs6000_pltseq))				\
     201      {									\
     202        error ("%qs not supported by your assembler", "-mpltseq");	\
     203      }									\
     204  									\
     205    if (DEFAULT_ABI == ABI_V4 && TARGET_PLTSEQ && !TARGET_SECURE_PLT)	\
     206      {									\
     207        if (OPTION_SET_P (rs6000_pltseq))				\
     208  	{								\
     209  	  if (OPTION_SET_P (secure_plt))				\
     210  	    error ("%qs and %qs are incompatible",			\
     211  		   "-mpltseq", "-mbss-plt");				\
     212  	  else								\
     213  	    secure_plt = true;						\
     214  	}								\
     215        if (!TARGET_SECURE_PLT)						\
     216  	rs6000_pltseq = false;						\
     217      }									\
     218  									\
     219    if (flag_pic > 1 && DEFAULT_ABI == ABI_V4)				\
     220      {									\
     221        /* Note: flag_pic should not change any option flags that would	\
     222  	 be invalid with or pessimise -fno-PIC code.  LTO turns off	\
     223  	 flag_pic when linking/recompiling a fixed position executable. \
     224  	 However, if the objects were originally compiled with -fPIC,	\
     225  	 then other target options forced on here by -fPIC are restored \
     226  	 when recompiling those objects without -fPIC.  In particular	\
     227  	 TARGET_RELOCATABLE must not be enabled here by flag_pic.  */	\
     228        rs6000_isa_flags |= OPTION_MASK_MINIMAL_TOC;			\
     229        TARGET_NO_FP_IN_TOC = 1;						\
     230      }									\
     231  									\
     232    if (TARGET_RELOCATABLE)						\
     233      {									\
     234        if (!flag_pic)							\
     235  	flag_pic = 2;							\
     236        TARGET_NO_FP_IN_TOC = 1;						\
     237      }									\
     238  } while (0)
     239  
     240  #ifndef RS6000_BI_ARCH
     241  # define SUBSUBTARGET_OVERRIDE_OPTIONS					\
     242  do {									\
     243    if ((TARGET_DEFAULT ^ rs6000_isa_flags) & OPTION_MASK_64BIT)		\
     244      error ("%<-m%s%> not supported in this configuration",		\
     245  	   (rs6000_isa_flags & OPTION_MASK_64BIT) ? "64" : "32");	\
     246  } while (0)
     247  #endif
     248  
     249  /* Override rs6000.h definition.  */
     250  #undef	TARGET_DEFAULT
     251  #define	TARGET_DEFAULT 0
     252  
     253  /* Override rs6000.h definition.  */
     254  #undef	PROCESSOR_DEFAULT
     255  #define	PROCESSOR_DEFAULT PROCESSOR_PPC750
     256  
     257  #define FIXED_R2 1
     258  /* System V.4 uses register 13 as a pointer to the small data area,
     259     so it is not available to the normal user.  */
     260  #define FIXED_R13 1
     261  
     262  /* Override default big endianism definitions in rs6000.h.  */
     263  #undef	BYTES_BIG_ENDIAN
     264  #undef	WORDS_BIG_ENDIAN
     265  #define	BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
     266  #define	WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
     267  
     268  /* Put jump tables in read-only memory, rather than in .text.  */
     269  #define JUMP_TABLES_IN_TEXT_SECTION 0
     270  
     271  /* Prefix and suffix to use to saving floating point.  */
     272  #define	SAVE_FP_PREFIX "_savefpr_"
     273  #define SAVE_FP_SUFFIX ""
     274  
     275  /* Prefix and suffix to use to restoring floating point.  */
     276  #define	RESTORE_FP_PREFIX "_restfpr_"
     277  #define RESTORE_FP_SUFFIX ""
     278  
     279  /* Type used for size_t, as a string used in a declaration.  */
     280  #undef  SIZE_TYPE
     281  #define SIZE_TYPE "unsigned int"
     282  
     283  /* Type used for ptrdiff_t, as a string used in a declaration.  */
     284  #define PTRDIFF_TYPE "int"
     285  
     286  #undef	WCHAR_TYPE
     287  #define WCHAR_TYPE "long int"
     288  
     289  #undef	WCHAR_TYPE_SIZE
     290  #define WCHAR_TYPE_SIZE 32
     291  
     292  /* Make int foo : 8 not cause structures to be aligned to an int boundary.  */
     293  /* Override elfos.h definition.  */
     294  #undef	PCC_BITFIELD_TYPE_MATTERS
     295  #define	PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE)
     296  
     297  #undef	BITFIELD_NBYTES_LIMITED
     298  #define	BITFIELD_NBYTES_LIMITED (TARGET_NO_BITFIELD_WORD)
     299  
     300  /* Define this macro to be the value 1 if instructions will fail to
     301     work if given data not on the nominal alignment.  If instructions
     302     will merely go slower in that case, define this macro as 0.  */
     303  #undef	STRICT_ALIGNMENT
     304  #define	STRICT_ALIGNMENT (TARGET_STRICT_ALIGN)
     305  
     306  /* Define this macro if you wish to preserve a certain alignment for
     307     the stack pointer, greater than what the hardware enforces.  The
     308     definition is a C expression for the desired alignment (measured
     309     in bits).  This macro must evaluate to a value equal to or larger
     310     than STACK_BOUNDARY.
     311     For the SYSV ABI and variants the alignment of the stack pointer
     312     is usually controlled manually in rs6000.cc. However, to maintain
     313     alignment across alloca () in all circumstances,
     314     PREFERRED_STACK_BOUNDARY needs to be set as well.
     315     This has the additional advantage of allowing a bigger maximum
     316     alignment of user objects on the stack.  */
     317  
     318  #undef PREFERRED_STACK_BOUNDARY
     319  #define PREFERRED_STACK_BOUNDARY 128
     320  
     321  /* Real stack boundary as mandated by the appropriate ABI.  */
     322  #define ABI_STACK_BOUNDARY \
     323    ((TARGET_EABI && !TARGET_ALTIVEC && !TARGET_ALTIVEC_ABI) ? 64 : 128)
     324  
     325  /* An expression for the alignment of a structure field FIELD if the
     326     alignment computed in the usual way is COMPUTED.  */
     327  #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED)			      \
     328  	(COMPUTED)
     329  
     330  #undef  BIGGEST_FIELD_ALIGNMENT
     331  
     332  /* Use ELF style section commands.  */
     333  
     334  #define	TEXT_SECTION_ASM_OP	"\t.section\t\".text\""
     335  
     336  #define	DATA_SECTION_ASM_OP	"\t.section\t\".data\""
     337  
     338  #define	BSS_SECTION_ASM_OP	"\t.section\t\".bss\""
     339  
     340  /* Override elfos.h definition.  */
     341  #undef	INIT_SECTION_ASM_OP
     342  #define	INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""
     343  
     344  /* Override elfos.h definition.  */
     345  #undef	FINI_SECTION_ASM_OP
     346  #define	FINI_SECTION_ASM_OP "\t.section\t\".fini\",\"ax\""
     347  
     348  #define	TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
     349  
     350  /* Put PC relative got entries in .got2.  */
     351  #define	MINIMAL_TOC_SECTION_ASM_OP \
     352    (flag_pic ? "\t.section\t\".got2\",\"aw\"" : "\t.section\t\".got1\",\"aw\"")
     353  
     354  #define	SDATA_SECTION_ASM_OP "\t.section\t\".sdata\",\"aw\""
     355  #define	SDATA2_SECTION_ASM_OP "\t.section\t\".sdata2\",\"a\""
     356  #define	SBSS_SECTION_ASM_OP "\t.section\t\".sbss\",\"aw\",@nobits"
     357  
     358  /* Override default elf definitions.  */
     359  #define TARGET_ASM_INIT_SECTIONS rs6000_elf_asm_init_sections
     360  #undef  TARGET_ASM_RELOC_RW_MASK
     361  #define TARGET_ASM_RELOC_RW_MASK rs6000_elf_reloc_rw_mask
     362  #undef	TARGET_ASM_SELECT_RTX_SECTION
     363  #define	TARGET_ASM_SELECT_RTX_SECTION rs6000_elf_select_rtx_section
     364  
     365  /* Return nonzero if this entry is to be written into the constant pool
     366     in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
     367     containing one of them.  If -mfp-in-toc (the default), we also do
     368     this for floating-point constants.  We actually can only do this
     369     if the FP formats of the target and host machines are the same, but
     370     we can't check that since not every file that uses these target macros
     371     includes real.h.
     372  
     373     Unlike AIX, we don't key off of -mminimal-toc, but instead do not
     374     allow floating point constants in the TOC if -mrelocatable.  */
     375  
     376  #undef	ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
     377  #define	ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)			\
     378    (TARGET_TOC								\
     379     && (SYMBOL_REF_P (X)							\
     380         || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS	\
     381  	   && SYMBOL_REF_P (XEXP (XEXP (X, 0), 0)))			\
     382         || GET_CODE (X) == LABEL_REF					\
     383         || (CONST_INT_P (X)						\
     384  	   && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))	\
     385         || (!TARGET_NO_FP_IN_TOC						\
     386  	   && CONST_DOUBLE_P (X)					\
     387  	   && SCALAR_FLOAT_MODE_P (GET_MODE (X))			\
     388  	   && BITS_PER_WORD == HOST_BITS_PER_INT)))
     389  
     390  /* These macros generate the special .type and .size directives which
     391     are used to set the corresponding fields of the linker symbol table
     392     entries in an ELF object file under SVR4.  These macros also output
     393     the starting labels for the relevant functions/objects.  */
     394  
     395  /* Write the extra assembler code needed to declare a function properly.
     396     Some svr4 assemblers need to also have something extra said about the
     397     function's return value.  We allow for that here.  */
     398  
     399  /* Override elfos.h definition.  */
     400  #undef	ASM_DECLARE_FUNCTION_NAME
     401  #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)			\
     402    rs6000_elf_declare_function_name ((FILE), (NAME), (DECL))
     403  
     404  /* The USER_LABEL_PREFIX stuff is affected by the -fleading-underscore
     405     flag.  The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
     406  
     407  #define	LOCAL_LABEL_PREFIX "."
     408  #define	USER_LABEL_PREFIX ""
     409  
     410  #define	ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)	\
     411    asm_fprintf (FILE, "%L%s", PREFIX)
     412  
     413  /* Globalizing directive for a label.  */
     414  #define GLOBAL_ASM_OP "\t.globl "
     415  
     416  /* This says how to output assembler code to declare an
     417     uninitialized internal linkage data object.  Under SVR4,
     418     the linker seems to want the alignment of data objects
     419     to depend on their types.  We do exactly that here.  */
     420  
     421  #define	LOCAL_ASM_OP	"\t.local\t"
     422  
     423  #define	LCOMM_ASM_OP	"\t.lcomm\t"
     424  
     425  /* Describe how to emit uninitialized local items.  */
     426  #define	ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)	\
     427  do {									\
     428    if ((DECL) && rs6000_elf_in_small_data_p (DECL))			\
     429      {									\
     430        switch_to_section (sbss_section);					\
     431        ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT));	\
     432        ASM_OUTPUT_LABEL (FILE, NAME);					\
     433        ASM_OUTPUT_SKIP (FILE, SIZE);					\
     434        if (!flag_inhibit_size_directive && (SIZE) > 0)			\
     435  	ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);			\
     436      }									\
     437    else									\
     438      {									\
     439        fprintf (FILE, "%s", LCOMM_ASM_OP);				\
     440        assemble_name ((FILE), (NAME));					\
     441        fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",		\
     442  	       (SIZE), (ALIGN) / BITS_PER_UNIT);			\
     443      }									\
     444    ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");			\
     445  } while (0)
     446  
     447  /* Describe how to emit uninitialized external linkage items.  */
     448  #define	ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)		\
     449  do {									\
     450    ASM_OUTPUT_ALIGNED_DECL_LOCAL (FILE, DECL, NAME, SIZE, ALIGN);	\
     451  } while (0)
     452  
     453  #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
     454  /* To support -falign-* switches we need to use .p2align so
     455     that alignment directives in code sections will be padded
     456     with no-op instructions, rather than zeroes.  */
     457  #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)			\
     458    if ((LOG) != 0)							\
     459      {									\
     460        if ((MAX_SKIP) == 0)						\
     461  	fprintf ((FILE), "\t.p2align %d\n", (LOG));			\
     462        else								\
     463  	fprintf ((FILE), "\t.p2align %d,,%d\n",	(LOG), (MAX_SKIP));	\
     464      }
     465  #endif
     466  
     467  /* This is how to output code to push a register on the stack.
     468     It need not be very fast code.
     469  
     470     On the rs6000, we must keep the backchain up to date.  In order
     471     to simplify things, always allocate 16 bytes for a push (System V
     472     wants to keep stack aligned to a 16 byte boundary).  */
     473  
     474  #define	ASM_OUTPUT_REG_PUSH(FILE, REGNO)				\
     475  do {									\
     476    if (DEFAULT_ABI == ABI_V4)						\
     477      asm_fprintf (FILE,							\
     478  		 "\tstwu %s,-16(%s)\n\tstw %s,12(%s)\n",	\
     479  		 reg_names[1], reg_names[1], reg_names[REGNO],		\
     480  		 reg_names[1]);						\
     481  } while (0)
     482  
     483  /* This is how to output an insn to pop a register from the stack.
     484     It need not be very fast code.  */
     485  
     486  #define	ASM_OUTPUT_REG_POP(FILE, REGNO)					\
     487  do {									\
     488    if (DEFAULT_ABI == ABI_V4)						\
     489      asm_fprintf (FILE,							\
     490  		 "\tlwz %s,12(%s)\n\taddi %s,%s,16\n",	\
     491  		 reg_names[REGNO], reg_names[1], reg_names[1],		\
     492  		 reg_names[1]);						\
     493  } while (0)
     494  
     495  extern int fixuplabelno;
     496  
     497  /* Handle constructors specially for -mrelocatable.  */
     498  #define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
     499  #define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor
     500  
     501  /* This is the end of what might become sysv4.h.  */
     502  
     503  /* Use DWARF 2 debugging information by default.  */
     504  #undef  PREFERRED_DEBUGGING_TYPE
     505  #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
     506  
     507  #define TARGET_ENCODE_SECTION_INFO  rs6000_elf_encode_section_info
     508  #define TARGET_IN_SMALL_DATA_P  rs6000_elf_in_small_data_p
     509  
     510  /* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */
     511  
     512  #define	RS6000_OUTPUT_BASENAME(FILE, NAME)	\
     513      assemble_name (FILE, NAME)
     514  
     515  /* This is the end of what might become sysv4dbx.h.  */
     516  
     517  #define TARGET_OS_SYSV_CPP_BUILTINS()		\
     518    do						\
     519      {						\
     520        if (rs6000_isa_flags_explicit		\
     521  	  & OPTION_MASK_RELOCATABLE)		\
     522  	builtin_define ("_RELOCATABLE");	\
     523      }						\
     524    while (0)
     525  
     526  #ifndef	TARGET_OS_CPP_BUILTINS
     527  #define TARGET_OS_CPP_BUILTINS()		\
     528    do						\
     529      {						\
     530        builtin_define_std ("PPC");		\
     531        builtin_define_std ("unix");		\
     532        builtin_define ("__svr4__");		\
     533        builtin_assert ("system=unix");		\
     534        builtin_assert ("system=svr4");		\
     535        builtin_assert ("cpu=powerpc");		\
     536        builtin_assert ("machine=powerpc");	\
     537        TARGET_OS_SYSV_CPP_BUILTINS ();		\
     538      }						\
     539    while (0)
     540  #endif
     541  
     542  /* Select one of BIG_OPT, LITTLE_OPT or DEFAULT_OPT depending
     543     on various -mbig, -mlittle and -mcall- options.  */
     544  #define ENDIAN_SELECT(BIG_OPT, LITTLE_OPT, DEFAULT_OPT)	\
     545  "%{mlittle|mlittle-endian:"	LITTLE_OPT ";"	\
     546    "mbig|mbig-endian:"		BIG_OPT    ";"	\
     547    "mcall-i960-old:"		LITTLE_OPT ";"	\
     548    ":"				DEFAULT_OPT "}"
     549  
     550  #define DEFAULT_ASM_ENDIAN " -mbig"
     551  
     552  #undef	ASM_SPEC
     553  #define	ASM_SPEC "%(asm_cpu) \
     554  %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
     555  %{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
     556  %{memb|msdata=eabi: -memb}" \
     557  ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
     558  
     559  #ifndef CC1_SECURE_PLT_DEFAULT_SPEC
     560  #define CC1_SECURE_PLT_DEFAULT_SPEC ""
     561  #endif
     562  #ifndef LINK_SECURE_PLT_DEFAULT_SPEC
     563  #define LINK_SECURE_PLT_DEFAULT_SPEC ""
     564  #endif
     565  
     566  /* Pass -G xxx to the compiler.  */
     567  #undef CC1_SPEC
     568  #define	CC1_SPEC "%{G*} %(cc1_cpu)" \
     569  "%{meabi: %{!mcall-*: -mcall-sysv }} \
     570  %{!meabi: %{!mno-eabi: \
     571      %{mrelocatable: -meabi } \
     572      %{mcall-freebsd: -mno-eabi } \
     573      %{mcall-i960-old: -meabi } \
     574      %{mcall-linux: -mno-eabi } \
     575      %{mcall-netbsd: -mno-eabi } \
     576      %{mcall-openbsd: -mno-eabi }}} \
     577  %{msdata: -msdata=default} \
     578  %{mno-sdata: -msdata=none} \
     579  %{!mbss-plt: %{!msecure-plt: %(cc1_secure_plt_default)}}" \
     580  GNU_USER_TARGET_CC1_SPEC
     581  
     582  /* Default starting address if specified.  */
     583  #define LINK_START_SPEC "\
     584  %{mads         : %(link_start_ads)         ; \
     585    myellowknife : %(link_start_yellowknife) ; \
     586    mmvme        : %(link_start_mvme)        ; \
     587    msim         : %(link_start_sim)         ; \
     588    mcall-freebsd: %(link_start_freebsd)     ; \
     589    mcall-linux  : %(link_start_linux)       ; \
     590    mcall-netbsd : %(link_start_netbsd)      ; \
     591    mcall-openbsd: %(link_start_openbsd)     ; \
     592                 : %(link_start_default)     }"
     593  
     594  #define LINK_START_DEFAULT_SPEC ""
     595  #define LINK_SECURE_PLT_SPEC LINK_SECURE_PLT_DEFAULT_SPEC
     596  
     597  #undef	LINK_SPEC
     598  #define	LINK_SPEC "\
     599  %{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
     600  %{R*} \
     601  %(link_shlib) \
     602  %{!T*: %(link_start) } \
     603  %{!static: %{!mbss-plt: %(link_secure_plt)}} \
     604  %(link_os)"
     605  
     606  /* Shared libraries are not default.  */
     607  #define LINK_SHLIB_SPEC "\
     608  %{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
     609  %{static: } \
     610  %{shared:-G -dy -z text } \
     611  %{symbolic:-Bsymbolic -G -dy -z text }"
     612  
     613  /* Any specific OS flags.  */
     614  #define LINK_OS_SPEC "\
     615  %{mads         : %(link_os_ads)         ; \
     616    myellowknife : %(link_os_yellowknife) ; \
     617    mmvme        : %(link_os_mvme)        ; \
     618    msim         : %(link_os_sim)         ; \
     619    mcall-freebsd: %(link_os_freebsd)     ; \
     620    mcall-linux  : %(link_os_linux)       ; \
     621    mcall-netbsd : %(link_os_netbsd)      ; \
     622    mcall-openbsd: %(link_os_openbsd)     ; \
     623                 : %(link_os_default)     }"
     624  
     625  #define LINK_OS_DEFAULT_SPEC ""
     626  
     627  /* Override rs6000.h definition.  */
     628  #undef	CPP_SPEC
     629  #define	CPP_SPEC "%{posix: -D_POSIX_SOURCE} \
     630  %{mads         : %(cpp_os_ads)         ; \
     631    myellowknife : %(cpp_os_yellowknife) ; \
     632    mmvme        : %(cpp_os_mvme)        ; \
     633    msim         : %(cpp_os_sim)         ; \
     634    mcall-freebsd: %(cpp_os_freebsd)     ; \
     635    mcall-linux  : %(cpp_os_linux)       ; \
     636    mcall-netbsd : %(cpp_os_netbsd)      ; \
     637    mcall-openbsd: %(cpp_os_openbsd)     ; \
     638                 : %(cpp_os_default)     }"
     639  
     640  #define	CPP_OS_DEFAULT_SPEC ""
     641  
     642  #undef	STARTFILE_SPEC
     643  #define	STARTFILE_SPEC "\
     644  %{mads         : %(startfile_ads)         ; \
     645    myellowknife : %(startfile_yellowknife) ; \
     646    mmvme        : %(startfile_mvme)        ; \
     647    msim         : %(startfile_sim)         ; \
     648    mcall-freebsd: %(startfile_freebsd)     ; \
     649    mcall-linux  : %(startfile_linux)       ; \
     650    mcall-netbsd : %(startfile_netbsd)      ; \
     651    mcall-openbsd: %(startfile_openbsd)     ; \
     652                 : %(startfile_default)     }"
     653  
     654  #define	STARTFILE_DEFAULT_SPEC "ecrti.o%s crtbegin.o%s"
     655  
     656  #undef	LIB_SPEC
     657  #define	LIB_SPEC "\
     658  %{mads         : %(lib_ads)         ; \
     659    myellowknife : %(lib_yellowknife) ; \
     660    mmvme        : %(lib_mvme)        ; \
     661    msim         : %(lib_sim)         ; \
     662    mcall-freebsd: %(lib_freebsd)     ; \
     663    mcall-linux  : %(lib_linux)       ; \
     664    mcall-netbsd : %(lib_netbsd)      ; \
     665    mcall-openbsd: %(lib_openbsd)     ; \
     666                 : %(lib_default)     }"
     667  
     668  #define LIB_DEFAULT_SPEC "-lc"
     669  
     670  #undef	ENDFILE_SPEC
     671  #define	ENDFILE_SPEC "\
     672  %{mads         : %(endfile_ads)         ; \
     673    myellowknife : %(endfile_yellowknife) ; \
     674    mmvme        : %(endfile_mvme)        ; \
     675    msim         : %(endfile_sim)         ; \
     676    mcall-freebsd: %(endfile_freebsd)     ; \
     677    mcall-linux  : %(endfile_linux)       ; \
     678    mcall-netbsd : %(endfile_netbsd)      ; \
     679    mcall-openbsd: %(endfile_openbsd)     ; \
     680                 : %(crtsavres_default) %(endfile_default)     }"
     681  
     682  #define CRTSAVRES_DEFAULT_SPEC ""
     683  
     684  #define	ENDFILE_DEFAULT_SPEC "crtend.o%s ecrtn.o%s"
     685  
     686  /* Motorola ADS support.  */
     687  #define LIB_ADS_SPEC "--start-group -lads -lc --end-group"
     688  
     689  #define	STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
     690  
     691  #define	ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"
     692  
     693  #define LINK_START_ADS_SPEC "-T ads.ld%s"
     694  
     695  #define LINK_OS_ADS_SPEC ""
     696  
     697  #define CPP_OS_ADS_SPEC ""
     698  
     699  /* Motorola Yellowknife support.  */
     700  #define LIB_YELLOWKNIFE_SPEC "--start-group -lyk -lc --end-group"
     701  
     702  #define	STARTFILE_YELLOWKNIFE_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
     703  
     704  #define	ENDFILE_YELLOWKNIFE_SPEC "crtend.o%s ecrtn.o%s"
     705  
     706  #define LINK_START_YELLOWKNIFE_SPEC "-T yellowknife.ld%s"
     707  
     708  #define LINK_OS_YELLOWKNIFE_SPEC ""
     709  
     710  #define CPP_OS_YELLOWKNIFE_SPEC ""
     711  
     712  /* Motorola MVME support.  */
     713  #define LIB_MVME_SPEC "--start-group -lmvme -lc --end-group"
     714  
     715  #define	STARTFILE_MVME_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
     716  
     717  #define	ENDFILE_MVME_SPEC "crtend.o%s ecrtn.o%s"
     718  
     719  #define LINK_START_MVME_SPEC "-Ttext 0x40000"
     720  
     721  #define LINK_OS_MVME_SPEC ""
     722  
     723  #define CPP_OS_MVME_SPEC ""
     724  
     725  /* PowerPC simulator based on netbsd system calls support.  */
     726  #define LIB_SIM_SPEC "--start-group -lsim -lc --end-group"
     727  
     728  #define	STARTFILE_SIM_SPEC "ecrti.o%s sim-crt0.o%s crtbegin.o%s"
     729  
     730  #define	ENDFILE_SIM_SPEC "crtend.o%s ecrtn.o%s"
     731  
     732  #define LINK_START_SIM_SPEC ""
     733  
     734  #define LINK_OS_SIM_SPEC "-m elf32ppcsim"
     735  
     736  #define CPP_OS_SIM_SPEC ""
     737  
     738  /* FreeBSD support.  */
     739  
     740  #define CPP_OS_FREEBSD_SPEC	"\
     741    -D__PPC__ -D__ppc__ -D__PowerPC__ -D__powerpc__ \
     742    -Acpu=powerpc -Amachine=powerpc"
     743  
     744  #define	STARTFILE_FREEBSD_SPEC	FBSD_STARTFILE_SPEC
     745  #define ENDFILE_FREEBSD_SPEC	FBSD_ENDFILE_SPEC
     746  #define LIB_FREEBSD_SPEC	FBSD_LIB_SPEC
     747  #define LINK_START_FREEBSD_SPEC	""
     748  
     749  #define LINK_OS_FREEBSD_SPEC "\
     750    %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
     751    %{v:-V} \
     752    %{assert*} %{R*} %{rpath*} %{defsym*} \
     753    %{shared:-Bshareable %{h*} %{soname*}} \
     754    %{!shared: \
     755      %{!static: \
     756        %{rdynamic: -export-dynamic} \
     757        -dynamic-linker %(fbsd_dynamic_linker) } \
     758      %{static:-Bstatic}} \
     759    %{symbolic:-Bsymbolic}"
     760  
     761  /* GNU/Linux support.  */
     762  #define LIB_LINUX_SPEC \
     763    "%{mnewlib: --start-group -llinux -lc --end-group; \
     764       :" GNU_USER_TARGET_LIB_SPEC "}"
     765  
     766  #define	STARTFILE_LINUX_SPEC GNU_USER_TARGET_STARTFILE_SPEC
     767  
     768  #define ENDFILE_LINUX_SPEC GNU_USER_TARGET_ENDFILE_SPEC
     769  
     770  #define LINK_START_LINUX_SPEC ""
     771  
     772  #define MUSL_DYNAMIC_LINKER_E ENDIAN_SELECT("","le","")
     773  
     774  #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
     775  #undef MUSL_DYNAMIC_LINKER
     776  #define MUSL_DYNAMIC_LINKER \
     777    "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"
     778  
     779  #ifndef GNU_USER_DYNAMIC_LINKER
     780  #define GNU_USER_DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER
     781  #endif
     782  
     783  #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
     784    %{rdynamic:-export-dynamic} \
     785    -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
     786  
     787  #define CPP_OS_LINUX_SPEC "%{pthread:-D_REENTRANT}"
     788  
     789  /* NetBSD support.  */
     790  #define LIB_NETBSD_SPEC "\
     791  -lc"
     792  
     793  #define	STARTFILE_NETBSD_SPEC "\
     794  ncrti.o%s crt0.o%s \
     795  %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
     796  
     797  #define ENDFILE_NETBSD_SPEC "\
     798  %{!shared:crtend.o%s} %{shared:crtendS.o%s} \
     799  ncrtn.o%s"
     800  
     801  #define LINK_START_NETBSD_SPEC "\
     802  "
     803  
     804  #define LINK_OS_NETBSD_SPEC "\
     805  %{!shared: %{!static: \
     806    %{rdynamic:-export-dynamic} \
     807    -dynamic-linker /usr/libexec/ld.elf_so}}"
     808  
     809  #define CPP_OS_NETBSD_SPEC "\
     810  -D__powerpc__ -D__NetBSD__ -D__KPRINTF_ATTRIBUTE__"
     811  
     812  /* OpenBSD support.  */
     813  #ifndef	LIB_OPENBSD_SPEC
     814  #define LIB_OPENBSD_SPEC "%{!shared:%{pthread:-lpthread%{p:_p}%{!p:%{pg:_p}}}} %{!shared:-lc%{p:_p}%{!p:%{pg:_p}}}"
     815  #endif
     816  
     817  #ifndef	STARTFILE_OPENBSD_SPEC
     818  #define	STARTFILE_OPENBSD_SPEC "\
     819  %{!shared: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
     820  %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
     821  #endif
     822  
     823  #ifndef	ENDFILE_OPENBSD_SPEC
     824  #define	ENDFILE_OPENBSD_SPEC "\
     825  %{!shared:crtend.o%s} %{shared:crtendS.o%s}"
     826  #endif
     827  
     828  #ifndef LINK_START_OPENBSD_SPEC
     829  #define LINK_START_OPENBSD_SPEC "-Ttext 0x400074"
     830  #endif
     831  
     832  #ifndef LINK_OS_OPENBSD_SPEC
     833  #define LINK_OS_OPENBSD_SPEC ""
     834  #endif
     835  
     836  #ifndef CPP_OS_OPENBSD_SPEC
     837  #define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
     838  #endif
     839  
     840  /* Define any extra SPECS that the compiler needs to generate.  */
     841  /* Override rs6000.h definition.  */
     842  #undef	SUBTARGET_EXTRA_SPECS
     843  #define	SUBTARGET_EXTRA_SPECS						\
     844    { "crtsavres_default",	CRTSAVRES_DEFAULT_SPEC },		\
     845    { "lib_ads",			LIB_ADS_SPEC },				\
     846    { "lib_yellowknife",		LIB_YELLOWKNIFE_SPEC },			\
     847    { "lib_mvme",			LIB_MVME_SPEC },			\
     848    { "lib_sim",			LIB_SIM_SPEC },				\
     849    { "lib_freebsd",		LIB_FREEBSD_SPEC },			\
     850    { "lib_linux",		LIB_LINUX_SPEC },			\
     851    { "lib_netbsd",		LIB_NETBSD_SPEC },			\
     852    { "lib_openbsd",		LIB_OPENBSD_SPEC },			\
     853    { "lib_default",		LIB_DEFAULT_SPEC },			\
     854    { "startfile_ads",		STARTFILE_ADS_SPEC },			\
     855    { "startfile_yellowknife",	STARTFILE_YELLOWKNIFE_SPEC },		\
     856    { "startfile_mvme",		STARTFILE_MVME_SPEC },			\
     857    { "startfile_sim",		STARTFILE_SIM_SPEC },			\
     858    { "startfile_freebsd",	STARTFILE_FREEBSD_SPEC },		\
     859    { "startfile_linux",		STARTFILE_LINUX_SPEC },			\
     860    { "startfile_netbsd",		STARTFILE_NETBSD_SPEC },		\
     861    { "startfile_openbsd",	STARTFILE_OPENBSD_SPEC },		\
     862    { "startfile_default",	STARTFILE_DEFAULT_SPEC },		\
     863    { "endfile_ads",		ENDFILE_ADS_SPEC },			\
     864    { "endfile_yellowknife",	ENDFILE_YELLOWKNIFE_SPEC },		\
     865    { "endfile_mvme",		ENDFILE_MVME_SPEC },			\
     866    { "endfile_sim",		ENDFILE_SIM_SPEC },			\
     867    { "endfile_freebsd",		ENDFILE_FREEBSD_SPEC },			\
     868    { "endfile_linux",		ENDFILE_LINUX_SPEC },			\
     869    { "endfile_netbsd",		ENDFILE_NETBSD_SPEC },			\
     870    { "endfile_openbsd",		ENDFILE_OPENBSD_SPEC },			\
     871    { "endfile_default",		ENDFILE_DEFAULT_SPEC },			\
     872    { "link_shlib",		LINK_SHLIB_SPEC },			\
     873    { "link_start",		LINK_START_SPEC },			\
     874    { "link_start_ads",		LINK_START_ADS_SPEC },			\
     875    { "link_start_yellowknife",	LINK_START_YELLOWKNIFE_SPEC },		\
     876    { "link_start_mvme",		LINK_START_MVME_SPEC },			\
     877    { "link_start_sim",		LINK_START_SIM_SPEC },			\
     878    { "link_start_freebsd",	LINK_START_FREEBSD_SPEC },		\
     879    { "link_start_linux",		LINK_START_LINUX_SPEC },		\
     880    { "link_start_netbsd",	LINK_START_NETBSD_SPEC },		\
     881    { "link_start_openbsd",	LINK_START_OPENBSD_SPEC },		\
     882    { "link_start_default",	LINK_START_DEFAULT_SPEC },		\
     883    { "link_os",			LINK_OS_SPEC },				\
     884    { "link_os_ads",		LINK_OS_ADS_SPEC },			\
     885    { "link_os_yellowknife",	LINK_OS_YELLOWKNIFE_SPEC },		\
     886    { "link_os_mvme",		LINK_OS_MVME_SPEC },			\
     887    { "link_os_sim",		LINK_OS_SIM_SPEC },			\
     888    { "link_os_freebsd",		LINK_OS_FREEBSD_SPEC },			\
     889    { "link_os_linux",		LINK_OS_LINUX_SPEC },			\
     890    { "link_os_netbsd",		LINK_OS_NETBSD_SPEC },			\
     891    { "link_os_openbsd",		LINK_OS_OPENBSD_SPEC },			\
     892    { "link_os_default",		LINK_OS_DEFAULT_SPEC },			\
     893    { "cc1_secure_plt_default",	CC1_SECURE_PLT_DEFAULT_SPEC },		\
     894    { "link_secure_plt",		LINK_SECURE_PLT_SPEC },			\
     895    { "cpp_os_ads",		CPP_OS_ADS_SPEC },			\
     896    { "cpp_os_yellowknife",	CPP_OS_YELLOWKNIFE_SPEC },		\
     897    { "cpp_os_mvme",		CPP_OS_MVME_SPEC },			\
     898    { "cpp_os_sim",		CPP_OS_SIM_SPEC },			\
     899    { "cpp_os_freebsd",		CPP_OS_FREEBSD_SPEC },			\
     900    { "cpp_os_linux",		CPP_OS_LINUX_SPEC },			\
     901    { "cpp_os_netbsd",		CPP_OS_NETBSD_SPEC },			\
     902    { "cpp_os_openbsd",		CPP_OS_OPENBSD_SPEC },			\
     903    { "cpp_os_default",		CPP_OS_DEFAULT_SPEC },			\
     904    { "fbsd_dynamic_linker",	FBSD_DYNAMIC_LINKER },			\
     905    SUBSUBTARGET_EXTRA_SPECS
     906  
     907  #define	SUBSUBTARGET_EXTRA_SPECS
     908  
     909  /* Define this macro as a C expression for the initializer of an
     910     array of string to tell the driver program which options are
     911     defaults for this target and thus do not need to be handled
     912     specially when using `MULTILIB_OPTIONS'.
     913  
     914     Do not define this macro if `MULTILIB_OPTIONS' is not defined in
     915     the target makefile fragment or if none of the options listed in
     916     `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
     917  
     918  #define	MULTILIB_DEFAULTS { "mbig", "mcall-sysv" }
     919  
     920  /* Define this macro if the code for function profiling should come
     921     before the function prologue.  Normally, the profiling code comes
     922     after.  */
     923  #define PROFILE_BEFORE_PROLOGUE 1
     924  
     925  /* Function name to call to do profiling.  */
     926  #define RS6000_MCOUNT "_mcount"
     927  
     928  /* Select a format to encode pointers in exception handling data.  CODE
     929     is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
     930     true if the symbol may be affected by dynamic relocations.  */
     931  #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL)			\
     932    (flag_pic								\
     933     ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel		\
     934        | DW_EH_PE_sdata4)						\
     935     : DW_EH_PE_absptr)
     936  
     937  #define DOUBLE_INT_ASM_OP "\t.quad\t"
     938  
     939  /* Generate entries in .fixup for relocatable addresses.  */
     940  #define RELOCATABLE_NEEDS_FIXUP 1
     941  
     942  #define TARGET_ASM_FILE_END rs6000_elf_file_end
     943  
     944  #undef TARGET_ASAN_SHADOW_OFFSET
     945  #define TARGET_ASAN_SHADOW_OFFSET rs6000_asan_shadow_offset
     946  
     947  /* This target uses the sysv4.opt file.  */
     948  #define TARGET_USES_SYSV4_OPT 1
     949  
     950  /* Include order changes for musl, same as in generic linux.h.  */
     951  #if DEFAULT_LIBC == LIBC_MUSL
     952  #define INCLUDE_DEFAULTS_MUSL_GPP			\
     953      { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,		\
     954        GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },		\
     955      { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,		\
     956        GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },		\
     957      { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,	\
     958        GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
     959  
     960  #ifdef LOCAL_INCLUDE_DIR
     961  #define INCLUDE_DEFAULTS_MUSL_LOCAL			\
     962      { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },		\
     963      { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
     964  #else
     965  #define INCLUDE_DEFAULTS_MUSL_LOCAL
     966  #endif
     967  
     968  #ifdef PREFIX_INCLUDE_DIR
     969  #define INCLUDE_DEFAULTS_MUSL_PREFIX			\
     970      { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
     971  #else
     972  #define INCLUDE_DEFAULTS_MUSL_PREFIX
     973  #endif
     974  
     975  #ifdef CROSS_INCLUDE_DIR
     976  #define INCLUDE_DEFAULTS_MUSL_CROSS			\
     977      { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
     978  #else
     979  #define INCLUDE_DEFAULTS_MUSL_CROSS
     980  #endif
     981  
     982  #ifdef TOOL_INCLUDE_DIR
     983  #define INCLUDE_DEFAULTS_MUSL_TOOL			\
     984      { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
     985  #else
     986  #define INCLUDE_DEFAULTS_MUSL_TOOL
     987  #endif
     988  
     989  #ifdef NATIVE_SYSTEM_HEADER_DIR
     990  #define INCLUDE_DEFAULTS_MUSL_NATIVE			\
     991      { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
     992      { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
     993  #else
     994  #define INCLUDE_DEFAULTS_MUSL_NATIVE
     995  #endif
     996  
     997  #if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
     998  # undef INCLUDE_DEFAULTS_MUSL_LOCAL
     999  # define INCLUDE_DEFAULTS_MUSL_LOCAL
    1000  # undef INCLUDE_DEFAULTS_MUSL_NATIVE
    1001  # define INCLUDE_DEFAULTS_MUSL_NATIVE
    1002  #else
    1003  # undef INCLUDE_DEFAULTS_MUSL_CROSS
    1004  # define INCLUDE_DEFAULTS_MUSL_CROSS
    1005  #endif
    1006  
    1007  #undef INCLUDE_DEFAULTS
    1008  #define INCLUDE_DEFAULTS				\
    1009    {							\
    1010      INCLUDE_DEFAULTS_MUSL_GPP				\
    1011      INCLUDE_DEFAULTS_MUSL_LOCAL				\
    1012      INCLUDE_DEFAULTS_MUSL_PREFIX			\
    1013      INCLUDE_DEFAULTS_MUSL_CROSS				\
    1014      INCLUDE_DEFAULTS_MUSL_TOOL				\
    1015      INCLUDE_DEFAULTS_MUSL_NATIVE			\
    1016      { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
    1017      { 0, 0, 0, 0, 0, 0 }				\
    1018    }
    1019  #endif