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_NO_TOC 0x02000000 /* do not use TOC for loading addresses */
-
- #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_NO_TOC (target_flags & MASK_NO_TOC)
-
- #define TARGET_BITFIELD_TYPE (! TARGET_NO_BITFIELD_TYPE)
- #define TARGET_TRACEBACK (! TARGET_NO_TRACEBACK)
- #define TARGET_BIG_ENDIAN (! TARGET_LITTLE_ENDIAN)
- #define TARGET_TOC (! TARGET_NO_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", MASK_NO_TOC | MASK_MINIMAL_TOC }, \
- { "toc", -MASK_NO_TOC },
-
- /* 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_NO_TOC) \
- { \
- target_flags &= ~ MASK_NO_TOC; \
- error ("-mrelocatable and -mno-toc are incompatible."); \
- } \
- \
- if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC) \
- { \
- target_flags |= MASK_MINIMAL_TOC; \
- error ("-mrelocatable and -mno-minimal-toc are incompatible."); \
- } \
- \
- if (TARGET_NO_TOC && !TARGET_MINIMAL_TOC) \
- { \
- target_flags |= MASK_MINIMAL_TOC; \
- error ("-mno-toc 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
-
- /* 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)
-
- /* 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
-
- /* 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) \
- { \
- if (! toc_initialized) \
- { \
- if (!TARGET_RELOCATABLE && !TARGET_NO_TOC) \
- fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP); \
- \
- if (TARGET_MINIMAL_TOC) \
- { \
- if (!TARGET_RELOCATABLE && !TARGET_NO_TOC) \
- { \
- ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LCTOC", 0); \
- fprintf (asm_out_file, "\t.tc "); \
- ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
- ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
- fprintf (asm_out_file, "\n"); \
- } \
- \
- fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
- ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
- fprintf (asm_out_file, " = .+32768\n"); \
- } \
- \
- toc_initialized = 1; \
- } \
- \
- else \
- fprintf (asm_out_file, "%s\n", \
- (TARGET_MINIMAL_TOC \
- ? MINIMAL_TOC_SECTION_ASM_OP \
- : TOC_SECTION_ASM_OP)); \
- \
- in_section = in_toc; \
- } \
- }
-
- #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=ppc601: -m601} %{mcpu=mpc601: -m601} \
- %{!mcpu=601: %{!mcpu=ppc601: %{!mcpu=mpc601: -mppc }}} \
- %{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
- %{mrelocatable} \
- %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
-
- /* 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)");
-
- #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} \
- %{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=mpc403: -D_ARCH_PPC} \
- %{mcpu=ppc403: -D_ARCH_PPC} \
- %{mcpu=601: -D_ARCH_PPC -D_ARCH_PWR} \
- %{mcpu=mpc601: -D_ARCH_PPC -D_ARCH_PWR} \
- %{mcpu=ppc601: -D_ARCH_PPC -D_ARCH_PWR} \
- %{mcpu=603: -D_ARCH_PPC} \
- %{mcpu=mpc603: -D_ARCH_PPC} \
- %{mcpu=ppc603: -D_ARCH_PPC} \
- %{mcpu=604: -D_ARCH_PPC} \
- %{mcpu=mpc604: -D_ARCH_PPC} \
- %{mcpu=ppc604: -D_ARCH_PPC}"
-