-/* Target definitions for GNU compiler for Intel 80386 running System V.4
- Copyright (C) 1991 Free Software Foundation, Inc.
+/* Target definitions for GCC for Intel 80386 running System V.4
+ Copyright (C) 1991, 2001, 2002, 2007 Free Software Foundation, Inc.
- Written by Ron Guilmette (rfg@ncd.com).
+ Written by Ron Guilmette (rfg@netcom.com).
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC 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)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC 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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-#include "i386.h" /* Base i386 target machine definitions */
-#include "att386.h" /* Use the i386 AT&T assembler syntax */
-#include "svr4.h" /* Definitions common to all SVR4 targets */
-#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 System V Release 4)");
-/* By default, target has a 80387. */
-
-#define TARGET_DEFAULT 1
-
-/* Machines that use the AT&T assembler syntax
- also return floating point values in an FP register. */
-/* Define how to find the value returned by a function.
- VALTYPE is the data type of the value (as a tree).
- If the precise function being called is known, FUNC is its FUNCTION_DECL;
- otherwise, FUNC is 0. */
-
-#define VALUE_REGNO(MODE) \
- (((MODE) == SFmode || (MODE) == DFmode) ? FIRST_FLOAT_REG : 0)
-
-/* 1 if N is a possible register number for a function value. */
-
-#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
-
/* The svr4 ABI for the i386 says that records and unions are returned
in memory. */
-#undef RETURN_IN_MEMORY
-#define RETURN_IN_MEMORY(TYPE) \
- (TREE_CODE (TYPE) == RECORD_TYPE || TREE_CODE(TYPE) == UNION_TYPE)
-
-/* Define which macros to predefine. __svr4__ is our extension. */
-/* 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 \
- "-Di386 -Dunix -D__svr4__ -Asystem(unix) -Acpu(i386) -Amachine(i386)"
+#define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \
+ (TYPE_MODE (TYPE) == BLKmode \
+ || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8));
/* 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)
-
-/* Define the register numbers to be used in Dwarf debugging information.
- The SVR4 reference port C compiler uses the following register numbers
- in its Dwarf output code:
-
- 0 for %eax (regno = 0)
- 1 for %ecx (regno = 2)
- 2 for %edx (regno = 1)
- 3 for %ebx (regno = 3)
- 4 for %esp (regno = 7)
- 5 for %ebp (regno = 6)
- 6 for %esi (regno = 4)
- 7 for %edi (regno = 5)
-
- 8 for FP_REGS[tos] (regno = 8)
- 9 for FP_REGS[tos-1] (regno = 9)
- 10 for FP_REGS[tos-2] (regno = 10)
- 11 for FP_REGS[tos-3] (regno = 11)
- 12 for FP_REGS[tos-4] (regno = 12)
- 13 for FP_REGS[tos-5] (regno = 13)
- 14 for FP_REGS[tos-6] (regno = 14)
- 15 for FP_REGS[tos-7] (regno = 15)
-*/
+#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
+#undef X86_FILE_START_VERSION_DIRECTIVE
+#define X86_FILE_START_VERSION_DIRECTIVE true
#undef DBX_REGISTER_NUMBER
-#define DBX_REGISTER_NUMBER(n) \
-((n) == 0 ? 0 \
- : (n) == 1 ? 2 \
- : (n) == 2 ? 1 \
- : (n) == 3 ? 3 \
- : (n) == 4 ? 6 \
- : (n) == 5 ? 7 \
- : (n) == 6 ? 5 \
- : (n) == 7 ? 4 \
- : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) \
- : (abort (), 0))
+#define DBX_REGISTER_NUMBER(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
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
do \
{ \
- register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
- register unsigned char *limit = _ascii_bytes + (LENGTH); \
- register unsigned bytes_in_chunk = 0; \
+ const unsigned char *_ascii_bytes = \
+ (const unsigned char *) (STR); \
+ const unsigned char *limit = _ascii_bytes + (LENGTH); \
+ unsigned bytes_in_chunk = 0; \
for (; _ascii_bytes < limit; _ascii_bytes++) \
{ \
- register unsigned char *p; \
+ const unsigned char *p; \
if (bytes_in_chunk >= 64) \
{ \
fputc ('\n', (FILE)); \
} \
for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
continue; \
- if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
+ if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT) \
{ \
if (bytes_in_chunk > 0) \
{ \
} \
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, 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
-
-#define WEAK_ASM_OP ".weak"
-#define DEF_ASM_OP ".set"
-
-/* Biggest alignment that any structure field can require on this
- machine, in bits. If packing is in effect, this can be smaller than
- normal. */
-
-#define BIGGEST_FIELD_ALIGNMENT \
- (maximum_field_alignment ? maximum_field_alignment : 32)
-
-extern int maximum_field_alignment;
-
-/* If bit field type is int, don't let it cross an int,
- and give entire struct the alignment of an int. */
-/* Required on the 386 since it doesn't have bitfield insns. */
-/* If packing is in effect, then the type doesn't matter. */
-
-#undef PCC_BITFIELD_TYPE_MATTERS
-#define PCC_BITFIELD_TYPE_MATTERS (maximum_field_alignment == 0)
-
-/* Code to handle #pragma directives. The interface is a bit messy,
- but there's no simpler way to do this while still using yylex. */
-#define HANDLE_PRAGMA(FILE) \
- do { \
- while (c == ' ' || c == '\t') \
- c = getc (FILE); \
- if (c == '\n' || c == EOF) \
- { \
- handle_pragma_token (0, 0); \
- return c; \
- } \
- ungetc (c, FILE); \
- switch (yylex ()) \
- { \
- case IDENTIFIER: \
- case TYPENAME: \
- case STRING: \
- case CONSTANT: \
- handle_pragma_token (token_buffer, yylval.ttype); \
- break; \
- default: \
- handle_pragma_token (token_buffer, 0); \
- } \
- if (nextchar >= 0) \
- c = nextchar, nextchar = -1; \
- else \
- c = getc (FILE); \
- } while (1)
-
-/* This says how to output assembler code to declare an
- uninitialized internal linkage data object. Under SVR4,
- the linker seems to want the alignment of data objects
- to depend on their types. We do exactly that here. */
-
-#undef ASM_OUTPUT_ALIGNED_LOCAL
-#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
-do { \
- fprintf (FILE, "\t.local\t%s\n", NAME); \
- ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN); \
-} while (0)
+/* A C statement (sans semicolon) to output to the stdio stream
+ FILE the assembler definition of uninitialized global DECL named
+ NAME whose size is SIZE bytes and alignment is ALIGN bytes.
+ Try to use asm_output_aligned_bss to implement this macro. */
+
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
+
+/* Handle special EH pointer encodings. Absolute, pc-relative, and
+ indirect are handled automatically. */
+#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
+ do { \
+ if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel) \
+ { \
+ fputs (ASM_LONG, FILE); \
+ assemble_name (FILE, XSTR (ADDR, 0)); \
+ fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
+ goto DONE; \
+ } \
+ } while (0)
+
+/* Used by crtstuff.c to initialize the base of data-relative relocations.
+ These are GOT relative on x86, so return the pic register. */
+#ifdef __PIC__
+#define CRT_GET_RFIB_DATA(BASE) \
+ { \
+ register void *ebx_ __asm__("ebx"); \
+ BASE = ebx_; \
+ }
+#else
+#define CRT_GET_RFIB_DATA(BASE) \
+ __asm__ ("call\t.LPR%=\n" \
+ ".LPR%=:\n\t" \
+ "pop{l}\t%0\n\t" \
+ /* Due to a GAS bug, this cannot use EAX. That encodes \
+ smaller than the traditional EBX, which results in the \
+ offset being off by one. */ \
+ "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
+ "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \
+ : "=d"(BASE))
+#endif
OSDN Git Service
