1/* Definitions for Intel 386 running system V. 2 Copyright (C) 1988, 1996, 2000, 2002 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC is free software; you can redistribute it and/or modify 7it under the terms of the GNU General Public License as published by 8the Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11GNU CC is distributed in the hope that it will be useful, 12but WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14GNU General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU CC; see the file COPYING. If not, write to 18the Free Software Foundation, 59 Temple Place - Suite 330, 19Boston, MA 02111-1307, USA. */ 20 21#define TARGET_VERSION fprintf (stderr, " (80386, ATT syntax)"); 22 23/* Use crt1.o as a startup file and crtn.o as a closing file. */ 24 25#define STARTFILE_SPEC \ 26 "%{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\ 27 %{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp}" 28 29/* ??? There is a suggestion that -lg is needed here. 30 Does anyone know whether this is right? */ 31#define LIB_SPEC "%{posix:-lcposix} %{shlib:-lc_s} -lc crtend.o%s crtn.o%s" 32 33/* Specify predefined symbols in preprocessor. */ 34 35#define TARGET_OS_CPP_BUILTINS() \ 36 do \ 37 { \ 38 builtin_define_std ("unix"); \ 39 builtin_assert ("system=svr3"); \ 40 } \ 41 while (0) 42 43#define CPP_SPEC "%{posix:-D_POSIX_SOURCE}" 44 45/* Writing `int' for a bit-field forces int alignment for the structure. */ 46 47#define PCC_BITFIELD_TYPE_MATTERS 1 48 49/* Don't write a `.optim' pseudo; this assembler doesn't handle them. */ 50 51#undef ASM_FILE_START_1 52#define ASM_FILE_START_1(FILE) 53 54/* We want to be able to get DBX debugging information via -gstabs. */ 55 56#define DBX_DEBUGGING_INFO 1 57 58#undef PREFERRED_DEBUGGING_TYPE 59#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG 60 61/* longjmp may fail to restore the registers if called from the same 62 function that called setjmp. To compensate, the compiler avoids 63 putting variables in registers in functions that use both setjmp 64 and longjmp. */ 65 66#define NON_SAVING_SETJMP \ 67 (current_function_calls_setjmp && current_function_calls_longjmp) 68 69/* longjmp may fail to restore the stack pointer if the saved frame 70 pointer is the same as the caller's frame pointer. Requiring a frame 71 pointer in any function that calls setjmp or longjmp avoids this 72 problem, unless setjmp and longjmp are called from the same function. 73 Since a frame pointer will be required in such a function, it is OK 74 that the stack pointer is not restored. */ 75 76#undef SUBTARGET_FRAME_POINTER_REQUIRED 77#define SUBTARGET_FRAME_POINTER_REQUIRED \ 78 (current_function_calls_setjmp || current_function_calls_longjmp) 79 80/* Modify ASM_OUTPUT_LOCAL slightly to test -msvr3-shlib. */ 81#undef ASM_OUTPUT_LOCAL 82#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 83 do { \ 84 int align = exact_log2 (ROUNDED); \ 85 if (align > 2) align = 2; \ 86 if (TARGET_SVR3_SHLIB) \ 87 data_section (); \ 88 else \ 89 bss_section (); \ 90 ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ 91 ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 92 fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \ 93 } while (0) 94 95/* Define a few machine-specific details of the implementation of 96 constructors. 97 98 The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN 99 and CTOR_LIST_END to contribute to the .init section an instruction to 100 push a word containing 0 (or some equivalent of that). */ 101 102#undef INIT_SECTION_ASM_OP 103#define INIT_SECTION_ASM_OP "\t.section .init,\"x\"" 104 105#define CTOR_LIST_BEGIN \ 106 asm (INIT_SECTION_ASM_OP); \ 107 asm ("pushl $0") 108#define CTOR_LIST_END CTOR_LIST_BEGIN 109 110#define TARGET_ASM_CONSTRUCTOR ix86_svr3_asm_out_constructor 111