143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/* Definitions for Intel 386 running Linux
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* Copyright (C) 1992 Free Software Foundation, Inc.
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*
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* Written by H.J. Lu (hlu@eecs.wsu.edu)
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*
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* Linux is a POSIX.1 compatible UNIX clone for i386, which uses GNU
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* stuffs as the native stuffs.
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*/
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#if 0 /* The FSF has fixed the known bugs. But ....... */
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/* Linux has a hacked gas 1.38.1, which can handle repz, repnz
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* and fildll.
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*/
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#define GOOD_GAS
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#endif
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/* This is tested by i386/gas.h. */
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#define YES_UNDERSCORES
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#include "i386/gstabs.h"
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/* Specify predefined symbols in preprocessor. */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES "-Dunix -Di386 -Dlinux"
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#undef CPP_SPEC
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#if TARGET_CPU_DEFAULT == 2
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#define CPP_SPEC "%{!m386:-D__i486__} %{posix:-D_POSIX_SOURCE}"
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#else
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#define CPP_SPEC "%{m486:-D__i486__} %{posix:-D_POSIX_SOURCE}"
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#endif
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#undef SIZE_TYPE
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#define SIZE_TYPE "unsigned int"
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "long int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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#undef HAVE_ATEXIT
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#define HAVE_ATEXIT
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/* Linux uses ctype from glibc.a. I am not sure how complete it is.
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* For now, we play safe. It may change later.
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*/
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#if 0
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#undef MULTIBYTE_CHARS
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#define MULTIBYTE_CHARS 1
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#endif
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#undef LIB_SPEC
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#define LIB_SPEC "%{g*:-lg} %{!g*:%{!p:%{!pg:-lc}}%{p:-lgmon -lc_p}%{pg:-lgmon -lc_p}}"
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#undef STARTFILE_SPEC
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#undef GPLUSPLUS_INCLUDE_DIR
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#ifdef CROSS_COMPILE
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/*
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* For cross-compile, we just need to search `$(tooldir)/lib'
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*/
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#define STARTFILE_SPEC \
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"%{g*:crt0.o%s -static} %{!g*:%{pg:gcrt0.o%s -static} %{!pg:%{p:gcrt0.o%s -static} %{!p:crt0.o%s %{!static:%{nojump:-nojump}} %{static:-static}}}}"
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/*
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*The cross-compile uses this.
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*/
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#define GPLUSPLUS_INCLUDE_DIR TOOLDIR"/g++-include"
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#else
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#define STARTFILE_SPEC \
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"%{g*:crt0.o%s -static} %{!g*:%{pg:gcrt0.o%s -static} %{!pg:%{p:gcrt0.o%s -static} %{!p:crt0.o%s %{!static:%{nojump:-nojump}} %{static:-static}}}}"
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/*
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*The native Linux system uses this.
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*/
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#define GPLUSPLUS_INCLUDE_DIR "/usr/g++-include"
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#endif
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/* The following macros are copied from i386bsd.h. */
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/* Redefine this to use %eax instead of %edx. */
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#undef FUNCTION_PROFILER
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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{ \
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if (flag_pic) \
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{ \
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fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n", \
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LPREFIX, (LABELNO)); \
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fprintf (FILE, "\tcall *_mcount@GOT(%%ebx)\n"); \
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} \
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else \
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{ \
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fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO)); \
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fprintf (FILE, "\tcall _mcount\n"); \
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} \
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}
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/* There are conflicting reports about whether this system uses
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a different assembler syntax. wilson@cygnus.com says # is right. */
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#undef COMMENT_BEGIN
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#define COMMENT_BEGIN "#"
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#undef ASM_APP_ON
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#define ASM_APP_ON "#APP\n"
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#undef ASM_APP_OFF
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#define ASM_APP_OFF "#NO_APP\n"
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/* The following macros are copied from i386v4.h. */
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/* These have to be defined to get PIC code correct */
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/* This is how to output an element of a case-vector that is relative.
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This is only used for PIC code. See comments by the `casesi' insn in
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i386.md for an explanation of the expression this outputs. */
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#undef ASM_OUTPUT_ADDR_DIFF_ELT
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#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
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fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
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/* Indicate that jump tables go in the text section. This is
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necessary when compiling PIC code. */
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#define JUMP_TABLES_IN_TEXT_SECTION
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/* Don't default to pcc-struct-return, because gcc is the only compiler, and
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we want to retain compatibility with older gcc versions. */
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#define DEFAULT_PCC_STRUCT_RETURN 0
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