253 lines
7.9 KiB
C
253 lines
7.9 KiB
C
/* Target definitions for GNU compiler for PowerPC running System V.4
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Copyright (C) 1995, Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* eABI local switches -- put here rather than eabi.h, so the switches
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can be tested in macros. */
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#define MASK_NO_BITFIELD_TYPE 0x40000000 /* Set PCC_BITFIELD_TYPE_MATTERS to 0 */
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#define MASK_STRICT_ALIGN 0x20000000 /* Set STRICT_ALIGNMENT to 1. */
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#define MASK_RELOCATABLE 0x10000000 /* GOT pointers are PC relative */
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#define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
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#define TARGET_BITFIELD_TYPE (! TARGET_NO_BITFIELD_TYPE)
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#define TARGET_STRICT_ALIGN (target_flags & MASK_STRICT_ALIGN)
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#define TARGET_RELOCATABLE (target_flags & MASK_RELOCATABLE)
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#undef SUBTARGET_SWITCHES
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#define SUBTARGET_SWITCHES \
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{ "bit-align", -MASK_NO_BITFIELD_TYPE }, \
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{ "no-bit-align", MASK_NO_BITFIELD_TYPE }, \
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{ "strict-align", MASK_STRICT_ALIGN }, \
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{ "no-strict-align", -MASK_STRICT_ALIGN }, \
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{ "relocatable", MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC }, \
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{ "no-relocatable", -MASK_RELOCATABLE },
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#include "rs6000/powerpc.h"
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/* Don't generate XCOFF debugging information. */
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#undef XCOFF_DEBUGGING_INFO
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/* Don't use the COFF object file format. */
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#undef OBJECT_FORMAT_COFF
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/* The XCOFF support uses weird symbol suffixes, which we don't want
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for ELF. */
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#undef RS6000_OUTPUT_BASENAME
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#define RS6000_OUTPUT_BASENAME(FILE, NAME) assemble_name (FILE, NAME)
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/* Don't bother to output .extern pseudo-ops. They are not needed by
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ELF assemblers. */
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#undef ASM_OUTPUT_EXTERNAL
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/* Undefine some things which are defined by the generic svr4.h. */
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#undef ASM_FILE_END
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#undef ASM_OUTPUT_EXTERNAL_LIBCALL
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#undef READONLY_DATA_SECTION
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#undef SELECT_SECTION
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#undef ASM_DECLARE_FUNCTION_NAME
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/* Use the regular svr4 definitions. */
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#include "svr4.h"
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/* Prefix and suffix to use to saving floating point */
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#undef SAVE_FP_PREFIX
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#undef SAVE_FP_SUFFIX
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#define SAVE_FP_PREFIX "_savefpr_"
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#define SAVE_FP_SUFFIX "_l"
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/* Prefix and suffix to use to restoring floating point */
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#undef RESTORE_FP_PREFIX
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#undef RESTORE_FP_SUFFIX
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#define RESTORE_FP_PREFIX "_restfpr_"
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#define RESTORE_FP_SUFFIX "_l"
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/* Type used for ptrdiff_t, as a string used in a declaration. */
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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/* Type used for wchar_t, as a string used in a declaration. */
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "short unsigned int"
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/* Width of wchar_t in bits. */
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE 16
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/* Align stack to 16 byte boundaries */
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#undef STACK_BOUNDARY
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#define STACK_BOUNDARY 128
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/* No data type wants to be aligned rounder than this. */
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#undef BIGGEST_ALIGNMENT
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#define BIGGEST_ALIGNMENT 128
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/* Use ELF style section commands. */
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#undef TEXT_SECTION_ASM_OP
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#define TEXT_SECTION_ASM_OP "\t.section\t\".text\""
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#undef DATA_SECTION_ASM_OP
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#define DATA_SECTION_ASM_OP "\t.section\t\".data\""
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/* Besides the usual ELF sections, we need a toc section. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_toc
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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CONST_SECTION_FUNCTION \
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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION \
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TOC_SECTION_FUNCTION
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#define TOC_SECTION_FUNCTION \
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void \
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toc_section () \
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{ \
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static int toc_initialized = 0; \
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\
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if (in_section != in_toc) \
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{ \
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if (! toc_initialized) \
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{ \
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if (!TARGET_RELOCATABLE) \
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fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP); \
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\
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if (TARGET_MINIMAL_TOC) \
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{ \
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if (!TARGET_RELOCATABLE) \
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{ \
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ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LCTOC", 0); \
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fprintf (asm_out_file, "\t.tc "); \
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ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
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ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
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fprintf (asm_out_file, "\n"); \
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} \
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\
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fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
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ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
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fprintf (asm_out_file, " = .+32768\n"); \
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} \
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\
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toc_initialized = 1; \
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} \
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\
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else \
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fprintf (asm_out_file, "%s\n", \
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(TARGET_MINIMAL_TOC \
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? MINIMAL_TOC_SECTION_ASM_OP \
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: TOC_SECTION_ASM_OP)); \
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\
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in_section = in_toc; \
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} \
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}
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#define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
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#define MINIMAL_TOC_SECTION_ASM_OP "\t.section\t\".got1\",\"aw\""
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/* Use the TOC section for TOC entries. */
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#undef SELECT_RTX_SECTION
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#define SELECT_RTX_SECTION(MODE, X) \
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{ if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
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toc_section (); \
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else \
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const_section (); \
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}
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/* These macros generate the special .type and .size directives which
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are used to set the corresponding fields of the linker symbol table
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entries in an ELF object file under SVR4. These macros also output
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the starting labels for the relevant functions/objects. */
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/* Write the extra assembler code needed to declare a function properly.
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Some svr4 assemblers need to also have something extra said about the
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function's return value. We allow for that here. */
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extern void svr4_traceback ();
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do { \
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fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
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assemble_name (FILE, NAME); \
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putc (',', FILE); \
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fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
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putc ('\n', FILE); \
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svr4_traceback (FILE, NAME, DECL); \
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ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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ASM_OUTPUT_LABEL(FILE, NAME); \
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} while (0)
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/* How to renumber registers for dbx and gdb. */
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#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
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/* svr4.h overrides ASM_OUTPUT_INTERNAL_LABEL. */
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#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
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#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
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fprintf (FILE, ".%s", PREFIX)
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/* Pass -mppc to the assembler, since that is what powerpc.h currently
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implies. */
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#undef ASM_SPEC
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#define ASM_SPEC \
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"-u -mppc %{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
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/* This is the end of what might become sysv4.h. */
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/* Allow stabs and dwarf, prefer dwarf. */
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#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
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#define DBX_DEBUGGING_INFO
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#define DWARF_DEBUGGING_INFO
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/* Line numbers are relative to the current function. */
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#undef ASM_OUTPUT_SOURCE_LINE
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#define ASM_OUTPUT_SOURCE_LINE(file, line) \
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{ static int sym_lineno = 1; \
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fprintf (file, ".stabn 68,0,%d,.LM%d-%s\n.LM%d:\n",\
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line, sym_lineno, \
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XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0), \
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sym_lineno); \
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sym_lineno += 1; }
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/* But, to make this work, we have to output the stabs for the function
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name *first*... */
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#define DBX_FUNCTION_FIRST
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/* This is the end of what might become sysv4dbx.h. */
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
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/* FIXME: These should actually indicate PowerPC, when there is some
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standard way of expressing that. */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES \
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"-DPPC -Dunix -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(powerpc) -Amachine(powerpc)"
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