/* Definitions for Intel 386 running Linux-based GNU systems with ELF format.
- Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005,
+ 2006, 2007, 2008, 2009, 2010 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. */
-
-#define LINUX_DEFAULT_ELF
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* 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); \
- if (ix86_asm_dialect == ASM_INTEL) \
- fputs ("\t.intel_syntax\n", FILE); \
- } while (0)
+#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)");
#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 "#"
To the best of my knowledge, no Linux libc has required the label
argument to mcount. */
-#define NO_PROFILE_COUNTERS
+#define NO_PROFILE_COUNTERS 1
#undef MCOUNT_NAME
#define MCOUNT_NAME "mcount"
frame, so we cannot allow profiling without a frame pointer. */
#undef SUBTARGET_FRAME_POINTER_REQUIRED
-#define SUBTARGET_FRAME_POINTER_REQUIRED current_function_profile
+#define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
- builtin_define_std ("linux"); \
- builtin_define_std ("unix"); \
- builtin_define ("__gnu_linux__"); \
- builtin_assert ("system=posix"); \
- if (flag_pic) \
- { \
- builtin_define ("__PIC__"); \
- builtin_define ("__pic__"); \
- } \
+ LINUX_TARGET_OS_CPP_BUILTINS(); \
} \
while (0)
#undef CPP_SPEC
-#ifdef USE_GNULIBC_1
-#define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
-#else
#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
-#endif
#undef CC1_SPEC
#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
/* Provide a LINK_SPEC appropriate for Linux. Here we provide support
for the special GCC options -static and -shared, which allow us to
link things in one of these three modes by applying the appropriate
- combinations of options at link-time. We like to support here for
- as many of the other GNU linker options as possible. But I don't
- have the time to search for those flags. I am sure how to add
- support for -soname shared_object_name. H.J.
-
- I took out %{v:%{!V:-V}}. It is too much :-(. They can use
- -Wl,-V.
+ combinations of options at link-time.
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. */
+/* 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 ASM_SPEC
+#define ASM_SPEC \
+ "%{v} --32 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
+
+#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
+
+/* 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) \
+ && (MAX_SKIP) >= 7) \
+ fputs ("\t.p2align 3\n", (FILE)); \
+ } \
} \
} while (0)
#endif
-#if defined(__PIC__) && defined (USE_GNULIBC_1)
-/* This is a kludge. The i386 GNU/Linux dynamic linker needs ___brk_addr,
- __environ and atexit. We have to make sure they are in the .dynsym
- section. We do this by forcing the assembler to create undefined
- references to these symbols in the object file. */
-#undef CRT_CALL_STATIC_FUNCTION
-#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
- asm (SECTION_OP "\n\t" \
- "call " USER_LABEL_PREFIX #FUNC "\n" \
- TEXT_SECTION_ASM_OP "\n\t" \
- ".extern ___brk_addr\n\t" \
- ".type ___brk_addr,@object\n\t" \
- ".extern __environ\n\t" \
- ".type __environ,@object\n\t" \
- ".extern atexit\n\t" \
- ".type atexit,@function");
-#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) \
#define CRT_GET_RFIB_DATA(BASE) \
__asm__ ("call\t.LPR%=\n" \
".LPR%=:\n\t" \
- "popl\t%0\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. */ \
- "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
+ "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \
+ "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \
: "=d"(BASE))
#endif
-/* Do code reading to identify a signal frame, and set the frame
- state data appropriately. See unwind-dw2.c for the structs. */
+/* Put all *tf routines in libgcc. */
+#undef LIBGCC2_HAS_TF_MODE
+#define LIBGCC2_HAS_TF_MODE 1
+#define LIBGCC2_TF_CEXT q
+#define TF_SIZE 113
-#ifdef IN_LIBGCC2
-/* There's no sys/ucontext.h for some (all?) libc1, so no
- signal-turned-exceptions for them. There's also no configure-run for
- the target, so we can't check on (e.g.) HAVE_SYS_UCONTEXT_H. Using the
- target libc1 macro should be enough. */
-#ifndef USE_GNULIBC_1
-#include <signal.h>
-#include <sys/ucontext.h>
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
-#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
- do { \
- unsigned char *pc_ = (CONTEXT)->ra; \
- struct sigcontext *sc_; \
- long new_cfa_; \
- \
- /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80 */ \
- if (*(unsigned short *)(pc_+0) == 0xb858 \
- && *(unsigned int *)(pc_+2) == 119 \
- && *(unsigned short *)(pc_+6) == 0x80cd) \
- sc_ = (CONTEXT)->cfa + 4; \
- /* movl $__NR_rt_sigreturn,%eax ; int $0x80 */ \
- else if (*(unsigned char *)(pc_+0) == 0xb8 \
- && *(unsigned int *)(pc_+1) == 173 \
- && *(unsigned short *)(pc_+5) == 0x80cd) \
- { \
- struct rt_sigframe { \
- int sig; \
- struct siginfo *pinfo; \
- void *puc; \
- struct siginfo info; \
- struct ucontext uc; \
- } *rt_ = (CONTEXT)->cfa; \
- sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \
- } \
- else \
- break; \
- \
- new_cfa_ = sc_->esp; \
- (FS)->cfa_how = CFA_REG_OFFSET; \
- (FS)->cfa_reg = 4; \
- (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
- \
- /* The SVR4 register numbering macros aren't usable in libgcc. */ \
- (FS)->regs.reg[0].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_; \
- (FS)->regs.reg[3].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_; \
- (FS)->regs.reg[1].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_; \
- (FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_; \
- (FS)->regs.reg[6].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_; \
- (FS)->regs.reg[7].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_; \
- (FS)->regs.reg[5].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_; \
- (FS)->regs.reg[8].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_; \
- (FS)->retaddr_column = 8; \
- goto SUCCESS; \
- } while (0)
-#endif /* not USE_GNULIBC_1 */
-#endif /* IN_LIBGCC2 */
+#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h"
+
+/* The stack pointer needs to be moved while checking the stack. */
+#define STACK_CHECK_MOVING_SP 1
+
+/* Static stack checking is supported by means of probes. */
+#define STACK_CHECK_STATIC_BUILTIN 1
+
+/* 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
+
+/* We steal the last transactional memory word. */
+#define TARGET_CAN_SPLIT_STACK
+#define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30
+#endif
OSDN Git Service
