i386elf.h revision 302408
1/* Target definitions for GCC for Intel 80386 using ELF 2 Copyright (C) 1988, 1991, 1995, 2000, 2001, 2002 3 Free Software Foundation, Inc. 4 5 Derived from sysv4.h written by Ron Guilmette (rfg@netcom.com). 6 7This file is part of GCC. 8 9GCC is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2, or (at your option) 12any later version. 13 14GCC is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with GCC; see the file COPYING. If not, write to 21the Free Software Foundation, 51 Franklin Street, Fifth Floor, 22Boston, MA 02110-1301, USA. */ 23 24/* Use stabs instead of DWARF debug format. */ 25#undef PREFERRED_DEBUGGING_TYPE 26#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 27 28#define TARGET_VERSION fprintf (stderr, " (i386 bare ELF target)"); 29 30/* By default, target has a 80387, uses IEEE compatible arithmetic, 31 and returns float values in the 387. */ 32 33#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS) 34 35/* The ELF ABI for the i386 says that records and unions are returned 36 in memory. */ 37 38#undef RETURN_IN_MEMORY 39#define RETURN_IN_MEMORY(TYPE) \ 40 (TYPE_MODE (TYPE) == BLKmode \ 41 || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8)) 42 43#undef CPP_SPEC 44#define CPP_SPEC "" 45 46#define ENDFILE_SPEC "crtend.o%s" 47 48#define STARTFILE_SPEC "%{!shared: \ 49 %{!symbolic: \ 50 %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\ 51 crtbegin.o%s" 52 53#undef DBX_REGISTER_NUMBER 54#define DBX_REGISTER_NUMBER(n) \ 55 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) 56 57/* The routine used to output sequences of byte values. We use a special 58 version of this for most svr4 targets because doing so makes the 59 generated assembly code more compact (and thus faster to assemble) 60 as well as more readable. Note that if we find subparts of the 61 character sequence which end with NUL (and which are shorter than 62 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */ 63 64#undef ASM_OUTPUT_ASCII 65#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ 66 do \ 67 { \ 68 const unsigned char *_ascii_bytes = \ 69 (const unsigned char *) (STR); \ 70 const unsigned char *limit = _ascii_bytes + (LENGTH); \ 71 unsigned bytes_in_chunk = 0; \ 72 for (; _ascii_bytes < limit; _ascii_bytes++) \ 73 { \ 74 const unsigned char *p; \ 75 if (bytes_in_chunk >= 64) \ 76 { \ 77 fputc ('\n', (FILE)); \ 78 bytes_in_chunk = 0; \ 79 } \ 80 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \ 81 continue; \ 82 if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT) \ 83 { \ 84 if (bytes_in_chunk > 0) \ 85 { \ 86 fputc ('\n', (FILE)); \ 87 bytes_in_chunk = 0; \ 88 } \ 89 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \ 90 _ascii_bytes = p; \ 91 } \ 92 else \ 93 { \ 94 if (bytes_in_chunk == 0) \ 95 fprintf ((FILE), "\t.byte\t"); \ 96 else \ 97 fputc (',', (FILE)); \ 98 fprintf ((FILE), "0x%02x", *_ascii_bytes); \ 99 bytes_in_chunk += 5; \ 100 } \ 101 } \ 102 if (bytes_in_chunk > 0) \ 103 fprintf ((FILE), "\n"); \ 104 } \ 105 while (0) 106 107#define LOCAL_LABEL_PREFIX "." 108 109/* Switch into a generic section. */ 110#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section 111 112/* If defined, a C expression whose value is a string containing the 113 assembler operation to identify the following data as 114 uninitialized global data. If not defined, and neither 115 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 116 uninitialized global data will be output in the data section if 117 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 118 used. */ 119#undef BSS_SECTION_ASM_OP 120#define BSS_SECTION_ASM_OP "\t.section\t.bss" 121 122/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 123 separate, explicit argument. If you define this macro, it is used 124 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 125 handling the required alignment of the variable. The alignment is 126 specified as the number of bits. 127 128 Try to use function `asm_output_aligned_bss' defined in file 129 `varasm.c' when defining this macro. */ 130#undef ASM_OUTPUT_ALIGNED_BSS 131#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 132 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 133