| /* Target definitions for GNU compiler for Intel 80386 using ELF |
| Copyright (C) 1988, 1991, 1995, 2000, 2001 Free Software Foundation, Inc. |
| |
| Derived from sysv4.h written by Ron Guilmette (rfg@netcom.com). |
| |
| This file is part of GNU CC. |
| |
| GNU CC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU CC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| |
| /* Use stabs instead of DWARF debug format. */ |
| #undef PREFERRED_DEBUGGING_TYPE |
| #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG |
| |
| #undef TARGET_VERSION |
| #define TARGET_VERSION fprintf (stderr, " (i386 bare ELF target)"); |
| |
| /* By default, target has a 80387, uses IEEE compatible arithmetic, |
| and returns float values in the 387. */ |
| |
| #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS) |
| |
| /* The ELF ABI for the i386 says that records and unions are returned |
| in memory. */ |
| |
| #undef RETURN_IN_MEMORY |
| #define RETURN_IN_MEMORY(TYPE) \ |
| (TYPE_MODE (TYPE) == BLKmode \ |
| || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8)) |
| |
| /* This used to define X86, but james@bigtex.cactus.org says that |
| is supposed to be defined optionally by user programs--not by default. */ |
| #define CPP_PREDEFINES "" |
| |
| #undef CPP_SPEC |
| #define CPP_SPEC "%(cpp_cpu)" |
| |
| /* This is how to output assembly code to define a `float' constant. |
| We always have to use a .long pseudo-op to do this because the native |
| SVR4 ELF assembler is buggy and it generates incorrect values when we |
| try to use the .float pseudo-op instead. */ |
| |
| #undef ASM_OUTPUT_FLOAT |
| #define ASM_OUTPUT_FLOAT(FILE,VALUE) \ |
| do { long value; \ |
| REAL_VALUE_TO_TARGET_SINGLE ((VALUE), value); \ |
| if (sizeof (int) == sizeof (long)) \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value); \ |
| else \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value); \ |
| } while (0) |
| |
| /* This is how to output assembly code to define a `double' constant. |
| We always have to use a pair of .long pseudo-ops to do this because |
| the native SVR4 ELF assembler is buggy and it generates incorrect |
| values when we try to use the the .double pseudo-op instead. */ |
| |
| #undef ASM_OUTPUT_DOUBLE |
| #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \ |
| do { long value[2]; \ |
| REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), value); \ |
| if (sizeof (int) == sizeof (long)) \ |
| { \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[0]); \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[1]); \ |
| } \ |
| else \ |
| { \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value[0]); \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value[1]); \ |
| } \ |
| } while (0) |
| |
| |
| #undef ASM_OUTPUT_LONG_DOUBLE |
| #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE) \ |
| do { long value[3]; \ |
| REAL_VALUE_TO_TARGET_LONG_DOUBLE ((VALUE), value); \ |
| if (sizeof (int) == sizeof (long)) \ |
| { \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[0]); \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[1]); \ |
| fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[2]); \ |
| } \ |
| else \ |
| { \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value[0]); \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value[1]); \ |
| fprintf((FILE), "%s\t0x%lx\n", ASM_LONG, value[2]); \ |
| } \ |
| } while (0) |
| |
| /* Output at beginning of assembler file. */ |
| /* The .file command should always begin the output. */ |
| |
| #undef ASM_FILE_START |
| #define ASM_FILE_START(FILE) \ |
| do { \ |
| output_file_directive (FILE, main_input_filename); \ |
| fprintf (FILE, "\t.version\t\"01.01\"\n"); \ |
| } while (0) |
| |
| #undef DBX_REGISTER_NUMBER |
| #define DBX_REGISTER_NUMBER(n) \ |
| (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) |
| |
| /* The routine used to output sequences of byte values. We use a special |
| version of this for most svr4 targets because doing so makes the |
| generated assembly code more compact (and thus faster to assemble) |
| as well as more readable. Note that if we find subparts of the |
| character sequence which end with NUL (and which are shorter than |
| STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */ |
| |
| #undef ASM_OUTPUT_ASCII |
| #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ |
| do \ |
| { \ |
| register const unsigned char *_ascii_bytes = \ |
| (const unsigned char *) (STR); \ |
| register const unsigned char *limit = _ascii_bytes + (LENGTH); \ |
| register unsigned bytes_in_chunk = 0; \ |
| for (; _ascii_bytes < limit; _ascii_bytes++) \ |
| { \ |
| register const unsigned char *p; \ |
| if (bytes_in_chunk >= 64) \ |
| { \ |
| fputc ('\n', (FILE)); \ |
| bytes_in_chunk = 0; \ |
| } \ |
| for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \ |
| continue; \ |
| if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \ |
| { \ |
| if (bytes_in_chunk > 0) \ |
| { \ |
| fputc ('\n', (FILE)); \ |
| bytes_in_chunk = 0; \ |
| } \ |
| ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \ |
| _ascii_bytes = p; \ |
| } \ |
| else \ |
| { \ |
| if (bytes_in_chunk == 0) \ |
| fprintf ((FILE), "\t.byte\t"); \ |
| else \ |
| fputc (',', (FILE)); \ |
| fprintf ((FILE), "0x%02x", *_ascii_bytes); \ |
| bytes_in_chunk += 5; \ |
| } \ |
| } \ |
| if (bytes_in_chunk > 0) \ |
| fprintf ((FILE), "\n"); \ |
| } \ |
| while (0) |
| |
| /* This is how to output an element of a case-vector that is relative. |
| This is only used for PIC code. See comments by the `casesi' insn in |
| i386.md for an explanation of the expression this outputs. */ |
| |
| #undef ASM_OUTPUT_ADDR_DIFF_ELT |
| #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
| fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE) |
| |
| /* Indicate that jump tables go in the text section. This is |
| necessary when compiling PIC code. */ |
| |
| #define JUMP_TABLES_IN_TEXT_SECTION 1 |
| |
| #define LOCAL_LABEL_PREFIX "." |
| |
| /* A C statement to output something to the assembler file to switch to section |
| NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or |
| NULL_TREE. Some target formats do not support arbitrary sections. Do not |
| define this macro in such cases. */ |
| |
| #undef ASM_OUTPUT_SECTION_NAME |
| #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \ |
| do { \ |
| if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \ |
| fprintf (FILE, ".section\t%s,\"ax\"\n", (NAME)); \ |
| else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \ |
| fprintf (FILE, ".section\t%s,\"a\"\n", (NAME)); \ |
| else \ |
| fprintf (FILE, ".section\t%s,\"aw\"\n", (NAME)); \ |
| } while (0) |
| |
| /* If defined, a C expression whose value is a string containing the |
| assembler operation to identify the following data as |
| uninitialized global data. If not defined, and neither |
| `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, |
| uninitialized global data will be output in the data section if |
| `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be |
| used. */ |
| #undef BSS_SECTION_ASM_OP |
| #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
| |
| /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a |
| separate, explicit argument. If you define this macro, it is used |
| in place of `ASM_OUTPUT_BSS', and gives you more flexibility in |
| handling the required alignment of the variable. The alignment is |
| specified as the number of bits. |
| |
| Try to use function `asm_output_aligned_bss' defined in file |
| `varasm.c' when defining this macro. */ |
| #undef ASM_OUTPUT_ALIGNED_BSS |
| #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ |
| asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) |
