home *** CD-ROM | disk | FTP | other *** search
- /* Target definitions for GNU compiler for PowerPC running System V.4
- Copyright (C) 1995, Free Software Foundation, Inc.
- Contributed by Cygnus Support.
-
- This file is part of GNU CC.
-
- GNU CC 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.
-
- GNU CC 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- /* eABI local switches -- put here rather than eabi.h, so the switches
- can be tested in macros. */
-
- #define MASK_NO_BITFIELD_TYPE 0x40000000 /* Set PCC_BITFIELD_TYPE_MATTERS to 0 */
- #define MASK_STRICT_ALIGN 0x20000000 /* Set STRICT_ALIGNMENT to 1. */
- #define MASK_RELOCATABLE 0x10000000 /* GOT pointers are PC relative */
- #define MASK_NO_TRACEBACK 0x08000000 /* eliminate traceback words */
- #define MASK_LITTLE_ENDIAN 0x04000000 /* target is little endian */
- #define MASK_AIX_CALLS 0x02000000 /* Use AIX calling sequence */
- #define MASK_PROTOTYPE 0x01000000 /* Only prototyped fcns pass variable args */
-
- #define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
- #define TARGET_STRICT_ALIGN (target_flags & MASK_STRICT_ALIGN)
- #define TARGET_RELOCATABLE (target_flags & MASK_RELOCATABLE)
- #define TARGET_NO_TRACEBACK (target_flags & MASK_NO_TRACEBACK)
- #define TARGET_LITTLE_ENDIAN (target_flags & MASK_LITTLE_ENDIAN)
- #define TARGET_AIX_CALLS (target_flags & MASK_AIX_CALLS)
- #define TARGET_PROTOTYPE (target_flags & MASK_PROTOTYPE)
- #define TARGET_TOC (target_flags & (MASK_64BIT \
- | MASK_RELOCATABLE \
- | MASK_MINIMAL_TOC))
-
- #define TARGET_BITFIELD_TYPE (! TARGET_NO_BITFIELD_TYPE)
- #define TARGET_TRACEBACK (! TARGET_NO_TRACEBACK)
- #define TARGET_BIG_ENDIAN (! TARGET_LITTLE_ENDIAN)
- #define TARGET_NO_AIX_CALLS (! TARGET_AIX_CALLS)
- #define TARGET_NO_PROTOTYPE (! TARGET_PROTOTYPE)
- #define TARGET_NO_TOC (! TARGET_TOC)
-
- #define TARGET_V4_CALLS TARGET_NO_AIX_CALLS
-
- /* Pseudo target to indicate whether the object format is ELF
- (to get around not having conditional compilation in the md file) */
- #define TARGET_ELF 1
-
- /* Note, V.4 no longer uses a normal TOC, so make -mfull-toc, be just
- the same as -mminimal-toc. */
- #undef SUBTARGET_SWITCHES
- #define SUBTARGET_SWITCHES \
- { "bit-align", -MASK_NO_BITFIELD_TYPE }, \
- { "no-bit-align", MASK_NO_BITFIELD_TYPE }, \
- { "strict-align", MASK_STRICT_ALIGN }, \
- { "no-strict-align", -MASK_STRICT_ALIGN }, \
- { "relocatable", MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC }, \
- { "no-relocatable", -MASK_RELOCATABLE }, \
- { "traceback", -MASK_NO_TRACEBACK }, \
- { "no-traceback", MASK_NO_TRACEBACK }, \
- { "little-endian", MASK_LITTLE_ENDIAN }, \
- { "little", MASK_LITTLE_ENDIAN }, \
- { "big-endian", -MASK_LITTLE_ENDIAN }, \
- { "big", -MASK_LITTLE_ENDIAN }, \
- { "no-toc", 0 }, \
- { "toc", MASK_MINIMAL_TOC }, \
- { "full-toc", MASK_MINIMAL_TOC }, \
- { "call-aix", MASK_AIX_CALLS }, \
- { "call-sysv", -MASK_AIX_CALLS }, \
- { "prototype", MASK_PROTOTYPE }, \
- { "no-prototype", -MASK_PROTOTYPE },
-
- /* Sometimes certain combinations of command options do not make sense
- on a particular target machine. You can define a macro
- `OVERRIDE_OPTIONS' to take account of this. This macro, if
- defined, is executed once just after all the command options have
- been parsed.
-
- The macro SUBTARGET_OVERRIDE_OPTIONS is provided for subtargets, to
- get control. */
-
- #define SUBTARGET_OVERRIDE_OPTIONS \
- do { \
- if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC) \
- { \
- target_flags |= MASK_MINIMAL_TOC; \
- error ("-mrelocatable and -mno-minimal-toc are incompatible."); \
- } \
- } while (0)
-
- #include "rs6000/powerpc.h"
-
- /* System V.4 uses register 13 as a pointer to the small data area,
- so it is not available to the normal user. */
-
- #undef FIXED_R13
- #define FIXED_R13 1
-
- /* System V.4 passes the first 8 floating arguments in registers,
- instead of the first 13 like AIX does. */
- #undef FP_ARG_MAX_REG
- #define FP_ARG_AIX_MAX_REG 45
- #define FP_ARG_V4_MAX_REG 40
- #define FP_ARG_MAX_REG ((TARGET_AIX_CALLS) ? FP_ARG_AIX_MAX_REG : FP_ARG_V4_MAX_REG)
-
- /* Size of the V.4 varargs area if needed */
- #undef RS6000_VARARGS_AREA
- #define RS6000_VARARGS_AREA ((rs6000_sysv_varargs_p) ? RS6000_VARARGS_SIZE : 0)
-
- /* Override default big endianism */
- #undef BYTES_BIG_ENDIAN
- #undef WORDS_BIG_ENDIAN
- #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
- #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
-
- /* Define this to set the endianness to use in libgcc2.c, which can
- not depend on target_flags. */
- #ifndef _LITTLE_ENDIAN
- #define LIBGCC2_WORDS_BIG_ENDIAN 1
- #else
- #define LIBGCC2_WORDS_BIG_ENDIAN 0
- #endif
-
- /* Size of the outgoing register save area */
- #undef RS6000_REG_SAVE
- #define RS6000_REG_SAVE (TARGET_AIX_CALLS ? (TARGET_64BIT ? 64 : 32) : 0)
-
- /* Size of the fixed area on the stack. For AIX, use the standard 6 word
- area, otherwise use 2 words to store back chain & LR. */
- #undef RS6000_SAVE_AREA
- #define RS6000_SAVE_AREA \
- ((TARGET_AIX_CALLS ? 24 : 8) << (TARGET_64BIT ? 1 : 0))
-
- /* Define cutoff for using external functions to save floating point.
- Currently on V.4, always use inline stores */
- #undef FP_SAVE_INLINE
- #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
-
- /* Don't generate XCOFF debugging information. */
-
- #undef XCOFF_DEBUGGING_INFO
-
- /* Don't use the COFF object file format. */
-
- #undef OBJECT_FORMAT_COFF
-
- /* The XCOFF support uses weird symbol suffixes, which we don't want
- for ELF. */
-
- #undef RS6000_OUTPUT_BASENAME
- #define RS6000_OUTPUT_BASENAME(FILE, NAME) assemble_name (FILE, NAME)
-
- /* Don't bother to output .extern pseudo-ops. They are not needed by
- ELF assemblers. */
-
- #undef ASM_OUTPUT_EXTERNAL
-
- /* Undefine some things which are defined by the generic svr4.h. */
-
- #undef ASM_FILE_END
- #undef ASM_OUTPUT_EXTERNAL_LIBCALL
- #undef READONLY_DATA_SECTION
- #undef SELECT_SECTION
- #undef ASM_DECLARE_FUNCTION_NAME
- #undef ASM_OUTPUT_CONSTRUCTOR
- #undef ASM_OUTPUT_DESTRUCTOR
-
- /* Use the regular svr4 definitions. */
-
- #include "svr4.h"
-
- /* Prefix and suffix to use to saving floating point */
- #undef SAVE_FP_PREFIX
- #undef SAVE_FP_SUFFIX
- #define SAVE_FP_PREFIX "_savefpr_"
- #define SAVE_FP_SUFFIX "_l"
-
- /* Prefix and suffix to use to restoring floating point */
- #undef RESTORE_FP_PREFIX
- #undef RESTORE_FP_SUFFIX
- #define RESTORE_FP_PREFIX "_restfpr_"
- #define RESTORE_FP_SUFFIX "_l"
-
- /* Type used for ptrdiff_t, as a string used in a declaration. */
- #undef PTRDIFF_TYPE
- #define PTRDIFF_TYPE "int"
-
- /* Type used for wchar_t, as a string used in a declaration. */
- #undef WCHAR_TYPE
- #define WCHAR_TYPE "short unsigned int"
-
- /* Width of wchar_t in bits. */
- #undef WCHAR_TYPE_SIZE
- #define WCHAR_TYPE_SIZE 16
-
- /* Align stack to 16 byte boundaries */
- #undef STACK_BOUNDARY
- #define STACK_BOUNDARY 128
-
- /* No data type wants to be aligned rounder than this. */
- #undef BIGGEST_ALIGNMENT
- #define BIGGEST_ALIGNMENT 128
-
- /* Use ELF style section commands. */
-
- #undef TEXT_SECTION_ASM_OP
- #define TEXT_SECTION_ASM_OP "\t.section\t\".text\""
-
- #undef DATA_SECTION_ASM_OP
- #define DATA_SECTION_ASM_OP "\t.section\t\".data\""
-
- /* Besides the usual ELF sections, we need a toc section. */
- #undef EXTRA_SECTIONS
- #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_toc
-
- #undef EXTRA_SECTION_FUNCTIONS
- #define EXTRA_SECTION_FUNCTIONS \
- CONST_SECTION_FUNCTION \
- CTORS_SECTION_FUNCTION \
- DTORS_SECTION_FUNCTION \
- TOC_SECTION_FUNCTION
-
- #define TOC_SECTION_FUNCTION \
- void \
- toc_section () \
- { \
- static int toc_initialized = 0; \
- \
- if (in_section != in_toc) \
- { \
- in_section = in_toc; \
- fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
- if (! toc_initialized) \
- { \
- ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
- fprintf (asm_out_file, " = .+32768\n"); \
- toc_initialized = 1; \
- } \
- } \
- }
-
- #define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
- #define MINIMAL_TOC_SECTION_ASM_OP "\t.section\t\".got1\",\"aw\""
-
- /* Use the TOC section for TOC entries. */
-
- #undef SELECT_RTX_SECTION
- #define SELECT_RTX_SECTION(MODE, X) \
- { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
- toc_section (); \
- else \
- const_section (); \
- }
-
- /* These macros generate the special .type and .size directives which
- are used to set the corresponding fields of the linker symbol table
- entries in an ELF object file under SVR4. These macros also output
- the starting labels for the relevant functions/objects. */
-
- /* Write the extra assembler code needed to declare a function properly.
- Some svr4 assemblers need to also have something extra said about the
- function's return value. We allow for that here. */
-
- extern void svr4_traceback ();
- extern int rs6000_pic_labelno;
-
- #undef ASM_DECLARE_FUNCTION_NAME
- #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
- do { \
- if (TARGET_RELOCATABLE && get_pool_size () != 0) \
- { \
- char buf[256]; \
- \
- ASM_OUTPUT_INTERNAL_LABEL (FILE, "LCL", rs6000_pic_labelno); \
- \
- ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 1); \
- fprintf (FILE, (TARGET_POWERPC64) ? "\t.quad " : "\t.long "); \
- assemble_name (FILE, buf); \
- putc ('-', FILE); \
- \
- ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno); \
- assemble_name (FILE, buf); \
- putc ('\n', FILE); \
- } \
- \
- fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
- assemble_name (FILE, NAME); \
- putc (',', FILE); \
- fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
- putc ('\n', FILE); \
- if (TARGET_TRACEBACK) \
- svr4_traceback (FILE, NAME, DECL); \
- ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
- ASM_OUTPUT_LABEL(FILE, NAME); \
- } while (0)
-
- /* How to renumber registers for dbx and gdb. */
-
- #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
-
- /* svr4.h overrides ASM_OUTPUT_INTERNAL_LABEL. */
-
- #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
- #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
- fprintf (FILE, ".%s", PREFIX)
-
- /* Pass -mppc to the assembler, since that is what powerpc.h currently
- implies. */
- #undef ASM_SPEC
- #define ASM_SPEC \
- "-u \
- %{mcpu=601: -m601} %{!mcpu=601: -mppc} \
- %{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
- %{mrelocatable} \
- %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
-
- /* Output .file and comments listing what options there are */
- #undef ASM_FILE_START
- #define ASM_FILE_START(FILE) \
- do { \
- ASM_OUTPUT_OPTIONS (FILE); \
- output_file_directive ((FILE), main_input_filename); \
- } while (0)
-
- /* This is the end of what might become sysv4.h. */
-
- /* Allow stabs and dwarf, prefer dwarf. */
- #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
- #define DBX_DEBUGGING_INFO
- #define DWARF_DEBUGGING_INFO
-
- /* This macro gets just the user-specified name
- out of the string in a SYMBOL_REF. Discard
- a leading * */
- #undef STRIP_NAME_ENCODING
- #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
- (VAR) = ((SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*'))
-
- /* Like block addresses, stabs line numbers are relative to the
- current function. */
-
- #undef ASM_OUTPUT_SOURCE_LINE
- #define ASM_OUTPUT_SOURCE_LINE(file, line) \
- do \
- { \
- static int sym_lineno = 1; \
- char *_p; \
- fprintf (file, "\t.stabn 68,0,%d,.LM%d-", \
- line, sym_lineno); \
- STRIP_NAME_ENCODING (_p, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
- assemble_name (file, _p); \
- fprintf (file, "\n.LM%d:\n", sym_lineno); \
- sym_lineno += 1; \
- } \
- while (0)
-
- /* But, to make this work, we have to output the stabs for the function
- name *first*... */
-
- #define DBX_FUNCTION_FIRST
-
- /* This is the end of what might become sysv4dbx.h. */
-
- #undef TARGET_VERSION
- #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
-
-
- /* Output assembler code for a block containing the constant parts
- of a trampoline, leaving space for the variable parts.
-
- The trampoline should set the static chain pointer to value placed
- into the trampoline and should branch to the specified routine.
-
- Unlike AIX, this needs real code. */
-
- #undef TRAMPOLINE_TEMPLATE
- #define TRAMPOLINE_TEMPLATE(FILE) \
- do { \
- char *sc = reg_names[STATIC_CHAIN_REGNUM]; \
- char *r0 = reg_names[0]; \
- \
- if (STATIC_CHAIN_REGNUM == 0 || !TARGET_NEW_MNEMONICS) \
- abort (); \
- \
- if (TARGET_64BIT) \
- { \
- fprintf (FILE, "\tmflr %s\n", r0); /* offset 0 */ \
- fprintf (FILE, "\tbl .LTRAMP1\n"); /* offset 4 */ \
- fprintf (FILE, "\t.long 0,0,0,0\n"); /* offset 8 */ \
- fprintf (FILE, ".LTRAMP1:\n"); \
- fprintf (FILE, "\tmflr %s\n", sc); /* offset 28 */ \
- fprintf (FILE, "\tmtlr %s\n", r0); /* offset 32 */ \
- fprintf (FILE, "\tld %s,0(%s)\n", r0, sc); /* offset 36 */ \
- fprintf (FILE, "\tld %s,8(%s)\n", sc, sc); /* offset 40 */ \
- fprintf (FILE, "\tmtctr %s\n", r0); /* offset 44 */ \
- fprintf (FILE, "\tbctr\n"); /* offset 48 */ \
- } \
- else \
- { \
- fprintf (FILE, "\tmflr %s\n", r0); /* offset 0 */ \
- fprintf (FILE, "\tbl .LTRAMP1\n"); /* offset 4 */ \
- fprintf (FILE, "\t.long 0,0\n"); /* offset 8 */ \
- fprintf (FILE, ".LTRAMP1:\n"); \
- fprintf (FILE, "\tmflr %s\n", sc); /* offset 20 */ \
- fprintf (FILE, "\tmtlr %s\n", r0); /* offset 24 */ \
- fprintf (FILE, "\tlwz %s,0(%s)\n", r0, sc); /* offset 28 */ \
- fprintf (FILE, "\tlwz %s,4(%s)\n", sc, sc); /* offset 32 */ \
- fprintf (FILE, "\tmtctr %s\n", r0); /* offset 36 */ \
- fprintf (FILE, "\tbctr\n"); /* offset 40 */ \
- } \
- } while (0)
-
- /* Length in units of the trampoline for entering a nested function. */
-
- #undef TRAMPOLINE_SIZE
- #define TRAMPOLINE_SIZE (TARGET_64BIT ? 48 : 40)
-
- /* Emit RTL insns to initialize the variable parts of a trampoline.
- FNADDR is an RTX for the address of the function's pure code.
- CXT is an RTX for the static chain value for the function. */
-
- #undef INITIALIZE_TRAMPOLINE
- #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
- { \
- rtx reg = gen_reg_rtx (Pmode); \
- \
- emit_move_insn (reg, FNADDR); \
- emit_move_insn (gen_rtx (MEM, Pmode, \
- plus_constant (ADDR, 8)), \
- reg); \
- emit_move_insn (gen_rtx (MEM, Pmode, \
- plus_constant (ADDR, (TARGET_64BIT ? 16 : 12))), \
- CXT); \
- emit_insn (gen_sync_isync (gen_rtx (MEM, BLKmode, ADDR))); \
- }
-
-
- #undef CPP_PREDEFINES
- #define CPP_PREDEFINES \
- "-DPPC -Dunix -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(powerpc) -Amachine(powerpc)"
-
- /* Don't put -Y P,<path> for cross compilers */
- #undef LINK_SPEC
- #ifdef CROSS_COMPILE
- #define LINK_SPEC "\
- %{h*} %{V} %{v:%{!V:-V}} \
- %{b} %{Wl,*:%*} \
- %{static:-dn -Bstatic} \
- %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
- %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
- %{G:-G} \
- %{YP,*} \
- %{Qy:} %{!Qn:-Qy} \
- %{mlittle: -oformat elf32-powerpcle } %{mlittle-endian: -oformat elf32-powerpcle } \
- %{mbig: -oformat elf32-powerpc } %{mbig-endian: -oformat elf32-powerpc }"
- #else
-
- #define LINK_SPEC "\
- %{h*} %{V} %{v:%{!V:-V}} \
- %{b} %{Wl,*:%*} \
- %{static:-dn -Bstatic} \
- %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
- %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
- %{G:-G} \
- %{YP,*} \
- %{!nostdlib: %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
- %{!p:-Y P,/usr/ccs/lib:/usr/lib}}} \
- %{Qy:} %{!Qn:-Qy} \
- %{mlittle: -oformat elf32-powerpcle } %{mlittle-endian: -oformat elf32-powerpcle } \
- %{mbig: -oformat elf32-powerpc } %{mbig-endian: -oformat elf32-powerpc }"
- #endif /* CROSS_COMPILE */
-
- #undef CPP_SPEC
- #define CPP_SPEC "\
- %{posix: -D_POSIX_SOURCE} \
- %{mrelocatable: -D_RELOCATABLE} \
- %{mcall-sysv: -D_CALL_SYSV} %{mcall-aix: -D_CALL_AIX} %{!mcall-sysv: %{!mcall-aix: -D_CALL_SYSV}} \
- %{msoft-float: -D_SOFT_FLOAT} %{mcpu=403: -D_SOFT_FLOAT} \
- %{mlittle: -D_LITTLE_ENDIAN -Amachine(littleendian)} \
- %{mlittle-endian: -D_LITTLE_ENDIAN -Amachine(littleendian)} \
- %{!mlittle: %{!mlittle-endian: -D_BIG_ENDIAN -Amachine(bigendian)}} \
- %{!mcpu*: \
- %{mpower: %{!mpower2: -D_ARCH_PWR}} \
- %{mpower2: -D_ARCH_PWR2} \
- %{mpowerpc*: -D_ARCH_PPC} \
- %{mno-powerpc: %{!mpower: %{!mpower2: -D_ARCH_COM}}} \
- %{!mno-powerpc: -D_ARCH_PPC}} \
- %{mcpu=common: -D_ARCH_COM} \
- %{mcpu=power: -D_ARCH_PWR} \
- %{mcpu=powerpc: -D_ARCH_PPC} \
- %{mcpu=rios: -D_ARCH_PWR} \
- %{mcpu=rios1: -D_ARCH_PWR} \
- %{mcpu=rios2: -D_ARCH_PWR2} \
- %{mcpu=rsc: -D_ARCH_PWR} \
- %{mcpu=rsc1: -D_ARCH_PWR} \
- %{mcpu=403: -D_ARCH_PPC} \
- %{mcpu=601: -D_ARCH_PPC -D_ARCH_PWR} \
- %{mcpu=603: -D_ARCH_PPC} \
- %{mcpu=604: -D_ARCH_PPC}"
-