-/* 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/i386.h" /* Base i386 target machine definitions */
-#include "i386/att.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)");
/* The svr4 ABI for the i386 says that records and unions are returned
#undef RETURN_IN_MEMORY
#define RETURN_IN_MEMORY(TYPE) \
- (TYPE_MODE (TYPE) == BLKmode)
-
-/* 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) -Asystem(svr4) -Acpu(i386) -Amachine(i386)"
-
-/* If the host and target formats match, output the floats as hex. */
-#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
-#if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN
-/* 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); \
- fprintf((FILE), "%s\t0x%x\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); \
- fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[0]); \
- fprintf((FILE), "%s\t0x%x\n", ASM_LONG, value[1]); \
- } while (0)
-#endif /* word order matches */
-#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
+ (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 (gnu regno = 0)
- 1 for %ecx (gnu regno = 2)
- 2 for %edx (gnu regno = 1)
- 3 for %ebx (gnu regno = 3)
- 4 for %esp (gnu regno = 7)
- 5 for %ebp (gnu regno = 6)
- 6 for %esi (gnu regno = 4)
- 7 for %edi (gnu regno = 5)
-
- The following three DWARF register numbers are never generated by
- the SVR4 C compiler or by the GNU compilers, but SDB on x86/svr4
- believes these numbers have these meanings.
-
- 8 for %eip (no gnu equivalent)
- 9 for %eflags (no gnu equivalent)
- 10 for %trapno (no gnu equivalent)
-
- It is not at all clear how we should number the FP stack registers
- for the x86 architecture. If the version of SDB on x86/svr4 were
- a bit less brain dead with respect to floating-point then we would
- have a precedent to follow with respect to DWARF register numbers
- for x86 FP registers, but the SDB on x86/svr4 is so completely
- broken with respect to FP registers that it is hardly worth thinking
- of it as something to strive for compatibility with.
-
- The verison of x86/svr4 SDB I have at the moment does (partially)
- seem to believe that DWARF register number 11 is associated with
- the x86 register %st(0), but that's about all. Higher DWARF
- register numbers don't seem to be associated with anything in
- particular, and even for DWARF regno 11, SDB only seems to under-
- stand that it should say that a variable lives in %st(0) (when
- asked via an `=' command) if we said it was in DWARF regno 11,
- but SDB still prints garbage when asked for the value of the
- variable in question (via a `/' command).
-
- (Also note that the labels SDB prints for various FP stack regs
- when doing an `x' command are all wrong.)
-
- Note that these problems generally don't affect the native SVR4
- C compiler because it doesn't allow the use of -O with -g and
- because when it is *not* optimizing, it allocates a memory
- location for each floating-point variable, and the memory
- location is what gets described in the DWARF AT_location
- attribute for the variable in question.
-
- Regardless of the severe mental illness of the x86/svr4 SDB, we
- do something sensible here and we use the following DWARF
- register numbers. Note that these are all stack-top-relative
- numbers.
-
- 11 for %st(0) (gnu regno = 8)
- 12 for %st(1) (gnu regno = 9)
- 13 for %st(2) (gnu regno = 10)
- 14 for %st(3) (gnu regno = 11)
- 15 for %st(4) (gnu regno = 12)
- 16 for %st(5) (gnu regno = 13)
- 17 for %st(6) (gnu regno = 14)
- 18 for %st(7) (gnu 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)+3 \
- : (-1))
+#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. */
+/* 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. */
-#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)
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
-/* Indicate that jump tables go in the text section. This is
- necessary when compiling PIC code. */
+/* 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)
-#define JUMP_TABLES_IN_TEXT_SECTION
+/* 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" \
+ "popl\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. */ \
+ "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
+ : "=d"(BASE))
+#endif
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