-/* Definitions for Intel 386 running Linux
- Copyright (C) 1992, 1994 Free Software Foundation, Inc.
- Contributed by H.J. Lu (hjl@nynexst.com)
+/* 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.
+ Contributed by Eric Youngdale.
+ Modified for stabs-in-ELF by H.J. Lu.
This file is part of GNU CC.
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. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
-#if 0 /* The FSF has fixed the known bugs. But ....... */
+#define LINUX_DEFAULT_ELF
-/* Linux has a hacked gas 1.38.1, which can handle repz, repnz
- and fildll. */
+/* 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 GOOD_GAS
-#endif
+#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)");
-/* Don't assume anything about the header files. */
-#define NO_IMPLICIT_EXTERN_C
+/* The svr4 ABI for the i386 says that records and unions are returned
+ in memory. */
+#undef DEFAULT_PCC_STRUCT_RETURN
+#define DEFAULT_PCC_STRUCT_RETURN 1
-/* This is tested by i386/gas.h. */
-#define YES_UNDERSCORES
+#undef ASM_COMMENT_START
+#define ASM_COMMENT_START "#"
-#ifndef LINUX_ELF
-#include "i386/gstabs.h"
-#endif
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n) \
+ (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
-/* Specify predefined symbols in preprocessor. */
+/* 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 CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dunix -Di386 -Dlinux -Asystem(unix) -Asystem(posix) -Acpu(i386) -Amachine(i386)"
+#define NO_PROFILE_COUNTERS
-#undef CPP_SPEC
-#if TARGET_CPU_DEFAULT == 2
-#define CPP_SPEC "%{!m386:-D__i486__} %{posix:-D_POSIX_SOURCE}"
-#else
-#define CPP_SPEC "%{m486:-D__i486__} %{posix:-D_POSIX_SOURCE}"
-#endif
+#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 current_function_profile
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
-
+
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
-
+
#undef WCHAR_TYPE
#define WCHAR_TYPE "long int"
-
+
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
+
+#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__"); \
+ } \
+ } \
+ 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 HAVE_ATEXIT
-#define HAVE_ATEXIT
+#undef CC1_SPEC
+#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
-/* Linux uses ctype from glibc.a. I am not sure how complete it is.
- For now, we play safe. It may change later. */
+/* 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.
-#if 0
-#undef MULTIBYTE_CHARS
-#define MULTIBYTE_CHARS 1
+ I took out %{v:%{!V:-V}}. It is too much :-(. They can use
+ -Wl,-V.
+
+ 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. */
+
+#undef LINK_SPEC
+#ifdef USE_GNULIBC_1
+#ifndef LINUX_DEFAULT_ELF
+#define LINK_SPEC "-m elf_i386 %{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}} \
+ %{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
+
+/* 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 LIB_SPEC
-#define LIB_SPEC \
-"%{mieee-fp:-lieee} %{p*:-lgmon} %{!static:-lc} \
- %{static:%{p*:-lc_p} %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
-
-#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "%{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}} %{static:-static}"
-
-\f
-/* There are conflicting reports about whether this system uses
- a different assembler syntax. wilson@cygnus.com says # is right. */
-#undef COMMENT_BEGIN
-#define COMMENT_BEGIN "#"
-
-#undef ASM_APP_ON
-#define ASM_APP_ON "#APP\n"
-
-#undef ASM_APP_OFF
-#define ASM_APP_OFF "#NO_APP\n"
-\f
-/* Don't default to pcc-struct-return, because gcc is the only compiler, and
- we want to retain compatibility with older gcc versions. */
-#ifndef LINUX_ELF
-#define DEFAULT_PCC_STRUCT_RETURN 0
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
+
+/* A C statement to output to the stdio stream FILE an assembler
+ command to advance the location counter to a multiple of 1<<LOG
+ bytes if it is within MAX_SKIP bytes.
+
+ This is used to align code labels according to Intel recommendations. */
+
+#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
+ 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)); \
+ } \
+ } while (0)
#endif
-/* We need that too. */
-#define HANDLE_SYSV_PRAGMA
+#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
-#undef LINK_SPEC
+/* 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)
-/* We want to pass -v to linker */
-#if TARGET_CPU_DEFAULT == 2
-#define LINK_SPEC "%{v:-dll-verbose} %{!m386:-m486}"
+/* 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 LINK_SPEC "%{v:-dll-verbose} %{m486:-m486}"
+#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
-/* Get perform_* macros to build libgcc.a. */
-#include "i386/perform.h"
+/* Do code reading to identify a signal frame, and set the frame
+ state data appropriately. See unwind-dw2.c for the structs. */
+
+#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 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 */
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