116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/* Definitions for Intel 386 running system V.
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Copyright (C) 1988, 1996, 2000 Free Software Foundation, Inc.
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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, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "i386/i386.h"
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/* Use default settings for system V.3. */
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#include "svr3.h"
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/* Use the ATT assembler syntax.
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This overrides at least one macro (USER_LABEL_PREFIX) from svr3.h. */
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#include "i386/att.h"
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/* Use crt1.o as a startup file and crtn.o as a closing file. */
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#define STARTFILE_SPEC \
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"%{pg:gcrt1.o%s}%{!pg:%{posix:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}%{!posix:%{p:mcrt1.o%s}%{!p:crt1.o%s}}} crtbegin.o%s\
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%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp}"
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/* ??? There is a suggestion that -lg is needed here.
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Does anyone know whether this is right? */
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#define LIB_SPEC "%{posix:-lcposix} %{shlib:-lc_s} -lc crtend.o%s crtn.o%s"
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/* Specify predefined symbols in preprocessor. */
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#define CPP_PREDEFINES "-Dunix -Asystem=svr3"
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#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE}"
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/* Writing `int' for a bitfield forces int alignment for the structure. */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* Don't write a `.optim' pseudo; this assembler doesn't handle them. */
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#undef ASM_FILE_START_1
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#define ASM_FILE_START_1(FILE)
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/* We want to be able to get DBX debugging information via -gstabs. */
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#undef DBX_DEBUGGING_INFO
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#define DBX_DEBUGGING_INFO
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#undef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
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/* longjmp may fail to restore the registers if called from the same
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function that called setjmp. To compensate, the compiler avoids
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putting variables in registers in functions that use both setjmp
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and longjmp. */
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#define NON_SAVING_SETJMP \
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(current_function_calls_setjmp && current_function_calls_longjmp)
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/* longjmp may fail to restore the stack pointer if the saved frame
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pointer is the same as the caller's frame pointer. Requiring a frame
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pointer in any function that calls setjmp or longjmp avoids this
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problem, unless setjmp and longjmp are called from the same function.
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Since a frame pointer will be required in such a function, it is OK
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that the stack pointer is not restored. */
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#undef SUBTARGET_FRAME_POINTER_REQUIRED
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#define SUBTARGET_FRAME_POINTER_REQUIRED \
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(current_function_calls_setjmp || current_function_calls_longjmp)
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/* Modify ASM_OUTPUT_LOCAL slightly to test -msvr3-shlib. */
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#undef ASM_OUTPUT_LOCAL
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#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
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do { \
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int align = exact_log2 (ROUNDED); \
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if (align > 2) align = 2; \
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if (TARGET_SVR3_SHLIB) \
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data_section (); \
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else \
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bss_section (); \
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ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
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ASM_OUTPUT_LABEL ((FILE), (NAME)); \
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fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
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} while (0)
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/* Define a few machine-specific details of the implementation of
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constructors.
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The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN
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and CTOR_LIST_END to contribute to the .init section an instruction to
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push a word containing 0 (or some equivalent of that). */
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#undef INIT_SECTION_ASM_OP
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#define INIT_SECTION_ASM_OP "\t.section .init,\"x\""
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#define CTOR_LIST_BEGIN \
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asm (INIT_SECTION_ASM_OP); \
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asm ("pushl $0")
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#define CTOR_LIST_END CTOR_LIST_BEGIN
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#define TARGET_ASM_CONSTRUCTOR ix86_svr3_asm_out_constructor
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