1 /* Target definitions for GCC for Intel 80386 using ELF 2 Copyright (C) 1988, 1991, 1995, 2000, 2001, 2002, 2007, 2008 3 Free Software Foundation, Inc. 4 5 Derived from sysv4.h written by Ron Guilmette (rfg@netcom.com). 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3, or (at your option) 12 any later version. 13 14 GCC is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 /* Use stabs instead of DWARF debug format. */ 24 #undef PREFERRED_DEBUGGING_TYPE 25 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 26 27 #define TARGET_VERSION fprintf (stderr, " (i386 bare ELF target)"); 28 29 /* The ELF ABI for the i386 says that records and unions are returned 30 in memory. */ 31 32 #define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \ 33 (TYPE_MODE (TYPE) == BLKmode \ 34 || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8)) 35 36 #undef CPP_SPEC 37 #define CPP_SPEC "" 38 39 #define ENDFILE_SPEC "crtend.o%s" 40 41 #define STARTFILE_SPEC "%{!shared: \ 42 %{!symbolic: \ 43 %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\ 44 crtbegin.o%s" 45 46 #undef DBX_REGISTER_NUMBER 47 #define DBX_REGISTER_NUMBER(n) \ 48 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) 49 50 /* The routine used to output sequences of byte values. We use a special 51 version of this for most svr4 targets because doing so makes the 52 generated assembly code more compact (and thus faster to assemble) 53 as well as more readable. Note that if we find subparts of the 54 character sequence which end with NUL (and which are shorter than 55 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */ 56 57 #undef ASM_OUTPUT_ASCII 58 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ 59 do \ 60 { \ 61 const unsigned char *_ascii_bytes = \ 62 (const unsigned char *) (STR); \ 63 const unsigned char *limit = _ascii_bytes + (LENGTH); \ 64 unsigned bytes_in_chunk = 0; \ 65 for (; _ascii_bytes < limit; _ascii_bytes++) \ 66 { \ 67 const unsigned char *p; \ 68 if (bytes_in_chunk >= 64) \ 69 { \ 70 fputc ('\n', (FILE)); \ 71 bytes_in_chunk = 0; \ 72 } \ 73 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \ 74 continue; \ 75 if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT) \ 76 { \ 77 if (bytes_in_chunk > 0) \ 78 { \ 79 fputc ('\n', (FILE)); \ 80 bytes_in_chunk = 0; \ 81 } \ 82 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \ 83 _ascii_bytes = p; \ 84 } \ 85 else \ 86 { \ 87 if (bytes_in_chunk == 0) \ 88 fputs (ASM_BYTE, (FILE)); \ 89 else \ 90 fputc (',', (FILE)); \ 91 fprintf ((FILE), "0x%02x", *_ascii_bytes); \ 92 bytes_in_chunk += 5; \ 93 } \ 94 } \ 95 if (bytes_in_chunk > 0) \ 96 fputc ('\n', (FILE)); \ 97 } \ 98 while (0) 99 100 #define LOCAL_LABEL_PREFIX "." 101 102 /* Switch into a generic section. */ 103 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section 104 105 /* If defined, a C expression whose value is a string containing the 106 assembler operation to identify the following data as 107 uninitialized global data. If not defined, and neither 108 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 109 uninitialized global data will be output in the data section if 110 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 111 used. */ 112 #undef BSS_SECTION_ASM_OP 113 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 114 115 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 116 separate, explicit argument. If you define this macro, it is used 117 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 118 handling the required alignment of the variable. The alignment is 119 specified as the number of bits. 120 121 Try to use function `asm_output_aligned_bss' defined in file 122 `varasm.c' when defining this macro. */ 123 #undef ASM_OUTPUT_ALIGNED_BSS 124 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 125 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 126