/* Definitions for Intel 386 running Linux-based GNU systems with ELF format.
- Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005,
+ 2006, 2007 Free Software Foundation, Inc.
Contributed by Eric Youngdale.
Modified for stabs-in-ELF by H.J. Lu.
-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, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-#define LINUX_DEFAULT_ELF
+/* Output at beginning of assembler file. */
+/* The .file command should always begin the output. */
+#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
-/* A lie, I guess, but the general idea behind linux/ELF is that we are
- supposed to be outputting something that will assemble under SVr4.
- This gets us pretty close. */
-#include <i386/i386.h> /* Base i386 target machine definitions */
-#include <i386/att.h> /* Use the i386 AT&T assembler syntax */
-#include <linux.h> /* some common stuff */
-
-#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)");
/* The svr4 ABI for the i386 says that records and unions are returned
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 1
+/* We arrange for the whole %gs segment to map the tls area. */
+#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
+#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
+
#undef ASM_COMMENT_START
#define ASM_COMMENT_START "#"
-/* 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)
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n) \
+ (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
-/* Indicate that jump tables go in the text section. This is
- necessary when compiling PIC code. */
-#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
+/* Output assembler code to FILE to call the profiler.
+ To the best of my knowledge, no Linux libc has required the label
+ argument to mcount. */
-#undef DBX_REGISTER_NUMBER
-#define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n]
-
-/* Output assembler code to FILE to increment profiler label # LABELNO
- for profiling a function entry. */
-
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO) \
-{ \
- if (flag_pic) \
- { \
- fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n", \
- LPREFIX, (LABELNO)); \
- fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n"); \
- } \
- else \
- { \
- fprintf (FILE, "\tmovl $%sP%d,%%edx\n", LPREFIX, (LABELNO)); \
- fprintf (FILE, "\tcall mcount\n"); \
- } \
-}
+#define NO_PROFILE_COUNTERS 1
+
+#undef MCOUNT_NAME
+#define MCOUNT_NAME "mcount"
+
+/* The GLIBC version of mcount for the x86 assumes that there is a
+ frame, so we cannot allow profiling without a frame pointer. */
+
+#undef SUBTARGET_FRAME_POINTER_REQUIRED
+#define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-D__ELF__ -Dunix -D__i386__ -Dlinux -Asystem(posix)"
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ LINUX_TARGET_OS_CPP_BUILTINS(); \
+ } \
+ while (0)
#undef CPP_SPEC
-#ifdef USE_GNULIBC_1
-#define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE}"
-#else
-#define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
-#endif
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
#undef CC1_SPEC
#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
When the -shared link option is used a final link is not being
done. */
-/* If ELF is the default format, we should not use /lib/elf. */
+/* If ELF is the default format, we should not use /lib/elf. */
+
+/* These macros may be overridden in k*bsd-gnu.h and i386/k*bsd-gnu.h. */
+#define LINK_EMULATION "elf_i386"
+#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+
+#undef SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS \
+ { "link_emulation", LINK_EMULATION },\
+ { "dynamic_linker", LINUX_DYNAMIC_LINKER }
#undef LINK_SPEC
-#ifdef USE_GNULIBC_1
-#ifndef LINUX_DEFAULT_ELF
-#define LINK_SPEC "-m elf_i386 %{shared:-shared} \
+#define LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
%{!shared: \
%{!ibcs: \
%{!static: \
%{rdynamic:-export-dynamic} \
- %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
- %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
-#else
-#define LINK_SPEC "-m elf_i386 %{shared:-shared} \
- %{!shared: \
- %{!ibcs: \
- %{!static: \
- %{rdynamic:-export-dynamic} \
- %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
+ %{!dynamic-linker:-dynamic-linker %(dynamic_linker)}} \
%{static:-static}}}"
-#endif
-#else
-#define LINK_SPEC "-m elf_i386 %{shared:-shared} \
- %{!shared: \
- %{!ibcs: \
- %{!static: \
- %{rdynamic:-export-dynamic} \
- %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
- %{static:-static}}}"
-#endif
-/* Get perform_* macros to build libgcc.a. */
-#include "i386/perform.h"
+/* Similar to standard Linux, but adding -ffast-math support. */
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+ "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+ %{mpc32:crtprec32.o%s} \
+ %{mpc64:crtprec64.o%s} \
+ %{mpc80:crtprec80.o%s} \
+ %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
/* A C statement (sans semicolon) to output to the stdio stream
FILE the assembler definition of uninitialized global DECL named
do { \
if ((LOG) != 0) { \
if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
- else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+ else { \
+ fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+ /* Make sure that we have at least 8 byte alignment if > 8 byte \
+ alignment is preferred. */ \
+ if ((LOG) > 3 && (1 << (LOG)) > ((MAX_SKIP) + 1)) \
+ fprintf ((FILE), "\t.p2align 3\n"); \
+ } \
} \
} while (0)
#endif
+
+/* 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
+
+#undef NEED_INDICATE_EXEC_STACK
+#define NEED_INDICATE_EXEC_STACK 1
+
+#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h"
+
+/* This macro may be overridden in i386/k*bsd-gnu.h. */
+#define REG_NAME(reg) reg
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* i386 glibc provides __stack_chk_guard in %gs:0x14. */
+#define TARGET_THREAD_SSP_OFFSET 0x14
+#endif
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