i386 MD bits for Gcc 3.1.
These are totally untested. Do these work? Hell if I know, I have yet to bootstrap using these bits. But people want them, so here they are.
This commit is contained in:
David E. O'Brien
parent
e4fe103d73
commit
353c69dcb9
@ -25,13 +25,11 @@ Boston, MA 02111-1307, USA. */
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/* $FreeBSD$ */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES \
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"-Di386 -Acpu(i386) -Amachine(i386)" \
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FBSD_CPP_PREDEFINES
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
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#undef CC1_SPEC
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#define CC1_SPEC "\
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#define CC1_SPEC "%(cc1_cpu) %{profile:-p} \
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%{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
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%{maout: %{!mno-underscores: %{!munderscores: -munderscores }}}"
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@ -119,19 +117,6 @@ Boston, MA 02111-1307, USA. */
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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/* This is the pseudo-op used to generate a 32-bit word of data with a
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specific value in some section. */
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#undef INT_ASM_OP
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#define INT_ASM_OP ".long"
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/* Biggest alignment supported by the object file format of this
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machine. Use this macro to limit the alignment which can be
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specified using the `__attribute__ ((aligned (N)))' construct. If
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not defined, the default value is `BIGGEST_ALIGNMENT'. */
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#define MAX_OFILE_ALIGNMENT (32768*8)
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
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@ -154,8 +139,8 @@ Boston, MA 02111-1307, USA. */
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{ "no-underscores", -MASK_UNDERSCORES, "Do not add leading underscores to symbols"},
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/* This goes away when the math emulator is fixed. */
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT \
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#undef TARGET_SUBTARGET_DEFAULT
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#define TARGET_SUBTARGET_DEFAULT \
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(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
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/* Don't default to pcc-struct-return, we want to retain compatibility with
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@ -187,31 +172,8 @@ Boston, MA 02111-1307, USA. */
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VOIDmode, 0); \
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} while (0)
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/* Indicate that jump tables go in the text section. This is
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necessary when compiling PIC code. */
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#undef JUMP_TABLES_IN_TEXT_SECTION
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#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
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/* override the exception table positioning */
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#undef EXCEPTION_SECTION
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#define EXCEPTION_SECTION() \
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do { \
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if (TARGET_ELF) \
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{ \
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named_section (NULL_TREE, ".gcc_except_table", 0); \
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} \
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else \
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{ \
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if (flag_pic) \
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data_section (); \
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else \
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readonly_data_section (); \
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} \
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} while (0);
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/* Tell final.c that we don't need a label passed to mcount. */
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#undef NO_PROFILE_COUNTERS
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#define NO_PROFILE_COUNTERS
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#define NO_PROFILE_COUNTERS 1
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/* Output assembler code to FILE to begin profiling of the current function.
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LABELNO is an optional label. */
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@ -228,32 +190,7 @@ Boston, MA 02111-1307, USA. */
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/* Output assembler code to FILE to end profiling of the current function. */
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#undef FUNCTION_PROFILER_EPILOGUE
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#define FUNCTION_PROFILER_EPILOGUE(FILE, DO_RTL) \
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do { \
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if (TARGET_PROFILER_EPILOGUE) \
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{ \
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if (DO_RTL) \
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{ \
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/* ".mexitcount" is specially handled in \
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ASM_HACK_SYMBOLREF () so that we don't need to handle \
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flag_pic or TARGET_AOUT here. */ \
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rtx xop; \
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xop = gen_rtx_MEM (FUNCTION_MODE, \
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gen_rtx_SYMBOL_REF (Pmode, ".mexitcount")); \
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emit_call_insn (gen_rtx (CALL, VOIDmode, xop, const0_rtx)); \
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} \
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else \
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{ \
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/* XXX this !DO_RTL case is broken but not actually used. */ \
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char *_name = TARGET_AOUT ? "mcount" : ".mcount"; \
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if (flag_pic) \
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fprintf (FILE, "\tcall *%s@GOT(%%ebx)\n", _name); \
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else \
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fprintf (FILE, "\tcall %s\n", _name); \
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} \
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} \
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} while (0)
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#undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */
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/************************[ Assembler stuff ]********************************/
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@ -268,39 +205,23 @@ Boston, MA 02111-1307, USA. */
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#undef ASM_APP_OFF
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#define ASM_APP_OFF "#NO_APP\n"
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/* Enable alias attribute support. */
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#undef SET_ASM_OP
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#define SET_ASM_OP ".set"
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/* This is how to begin an assembly language file.
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The .file command should always begin the output.
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ELF also needs a .version. */
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#undef ASM_FILE_START
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#define ASM_FILE_START(FILE) \
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do { \
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output_file_directive ((FILE), main_input_filename); \
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if (TARGET_ELF) \
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fprintf ((FILE), "\t.version\t\"01.01\"\n"); \
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} while (0)
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/* This is how to store into the string BUF
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the symbol_ref name of an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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This is suitable for output with `assemble_name'. */
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#undef ASM_GENERATE_INTERNAL_LABEL
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#define ASM_GENERATE_INTERNAL_LABEL(BUF, PREFIX, NUMBER) \
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sprintf ((BUF), "*%s%s%d", (TARGET_UNDERSCORES) ? "" : ".", \
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(PREFIX), (NUMBER))
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#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
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sprintf ((LABEL), "*%s%s%u", (TARGET_UNDERSCORES) ? "" : ".", \
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(PREFIX), (unsigned) (NUM))
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/* This is how to output an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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For most svr4/ELF systems, the convention is that any symbol which begins
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with a period is not put into the linker symbol table by the assembler. */
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#undef ASM_OUTPUT_INTERNAL_LABEL
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#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
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fprintf ((FILE), "%s%s%d:\n", (TARGET_UNDERSCORES) ? "" : ".", \
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(PREFIX), (NUM))
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#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
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fprintf ((FILE), "%s%s%u:\n", (TARGET_UNDERSCORES) ? "" : ".", \
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(PREFIX), (unsigned) (NUM))
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/* This is how to output a reference to a user-level label named NAME. */
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#undef ASM_OUTPUT_LABELREF
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@ -325,15 +246,7 @@ Boston, MA 02111-1307, USA. */
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/* This is how to hack on the symbol code of certain relcalcitrant
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symbols to modify their output in output_pic_addr_const (). */
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#undef ASM_HACK_SYMBOLREF_CODE
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#define ASM_HACK_SYMBOLREF_CODE(NAME, CODE) \
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do { \
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/* Part of hack to avoid writing lots of rtl in \
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FUNCTION_PROFILER_EPILOGUE (). */ \
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char *_name = (NAME); \
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if (*_name == '.' && strcmp(_name + 1, "mexitcount") == 0) \
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(CODE) = 'X'; \
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} while (0)
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#undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */
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/* This is how to output an element of a case-vector that is relative.
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This is only used for PIC code. See comments by the `casesi' insn in
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@ -435,250 +348,19 @@ Boston, MA 02111-1307, USA. */
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} \
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} while (0)
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/* These macros generate the special .type and .size directives which
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are used to set the corresponding fields of the linker symbol table
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entries in an ELF object file under SVR4. These macros also output
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the starting labels for the relevant functions/objects. */
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/* A C statement to output to the stdio stream FILE an assembler
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command to advance the location counter to a multiple of 1<<LOG
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bytes if it is within MAX_SKIP bytes.
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/* Write the extra assembler code needed to declare a function properly.
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Some svr4 assemblers need to also have something extra said about the
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function's return value. We allow for that here. */
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This is used to align code labels according to Intel recommendations. */
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do { \
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fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
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assemble_name (FILE, NAME); \
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putc (',', FILE); \
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fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
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putc ('\n', FILE); \
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ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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ASM_OUTPUT_LABEL(FILE, NAME); \
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} while (0)
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/* This is how to declare the size of a function. */
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#undef ASM_DECLARE_FUNCTION_SIZE
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#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
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do { \
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if (!flag_inhibit_size_directive) \
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{ \
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char label[256]; \
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static int labelno; \
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labelno++; \
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ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
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ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
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fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
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assemble_name (FILE, (FNAME)); \
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fprintf (FILE, ","); \
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assemble_name (FILE, label); \
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fprintf (FILE, "-"); \
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assemble_name (FILE, (FNAME)); \
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putc ('\n', FILE); \
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} \
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} while (0)
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/* The routine used to output NUL terminated strings. We use a special
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version of this for most svr4 targets because doing so makes the
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generated assembly code more compact (and thus faster to assemble)
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as well as more readable, especially for targets like the i386
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(where the only alternative is to output character sequences as
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comma separated lists of numbers). */
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#undef ASM_OUTPUT_LIMITED_STRING
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#define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
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do { \
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register unsigned char *_limited_str = (unsigned char *) (STR); \
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register unsigned ch; \
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fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
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for (; (ch = *_limited_str); _limited_str++) \
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{ \
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register int escape; \
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switch (escape = ESCAPES[ch]) \
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{ \
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case 0: \
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putc (ch, (FILE)); \
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break; \
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case 1: \
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fprintf ((FILE), "\\%03o", ch); \
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break; \
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default: \
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putc ('\\', (FILE)); \
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putc (escape, (FILE)); \
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break; \
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} \
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} \
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fprintf ((FILE), "\"\n"); \
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} while (0)
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/* Switch into a generic section.
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We make the section read-only and executable for a function decl,
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read-only for a const data decl, and writable for a non-const data decl.
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If the section has already been defined, we must not
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emit the attributes here. The SVR4 assembler does not
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recognize section redefinitions.
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If DECL is NULL, no attributes are emitted. */
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#undef ASM_OUTPUT_SECTION_NAME
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#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
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do { \
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static struct section_info \
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{ \
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struct section_info *next; \
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char *name; \
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enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
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} *sections; \
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struct section_info *s; \
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char *mode; \
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enum sect_enum type; \
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\
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for (s = sections; s; s = s->next) \
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if (!strcmp (NAME, s->name)) \
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break; \
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\
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if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
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type = SECT_EXEC, mode = "ax"; \
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else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
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type = SECT_RO, mode = "a"; \
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else \
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type = SECT_RW, mode = "aw"; \
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\
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if (s == 0) \
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{ \
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s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
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s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
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strcpy (s->name, NAME); \
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s->type = type; \
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s->next = sections; \
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sections = s; \
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fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, mode); \
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} \
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else \
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{ \
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if (DECL && s->type != type) \
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error_with_decl (DECL, "%s causes a section type conflict"); \
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\
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fprintf (FILE, ".section\t%s\n", NAME); \
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} \
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} while (0)
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#undef MAKE_DECL_ONE_ONLY
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#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
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#undef UNIQUE_SECTION_P
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#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
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#undef UNIQUE_SECTION
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#define UNIQUE_SECTION(DECL,RELOC) \
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do { \
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int len; \
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char *name, *string, *prefix; \
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\
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name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
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\
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if (! DECL_ONE_ONLY (DECL)) \
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{ \
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prefix = "."; \
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if (TREE_CODE (DECL) == FUNCTION_DECL) \
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prefix = ".text."; \
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else if (DECL_READONLY_SECTION (DECL, RELOC)) \
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prefix = ".rodata."; \
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else \
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prefix = ".data."; \
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} \
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else if (TREE_CODE (DECL) == FUNCTION_DECL) \
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prefix = ".gnu.linkonce.t."; \
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else if (DECL_READONLY_SECTION (DECL, RELOC)) \
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prefix = ".gnu.linkonce.r."; \
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else \
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prefix = ".gnu.linkonce.d."; \
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\
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len = strlen (name) + strlen (prefix); \
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string = alloca (len + 1); \
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sprintf (string, "%s%s", prefix, name); \
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\
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DECL_SECTION_NAME (DECL) = build_string (len, string); \
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} while (0)
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/* A C statement or statements to switch to the appropriate
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section for output of DECL. DECL is either a `VAR_DECL' node
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or a constant of some sort. RELOC indicates whether forming
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the initial value of DECL requires link-time relocations. */
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#undef SELECT_SECTION
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#define SELECT_SECTION(DECL,RELOC) \
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{ \
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if (flag_pic && RELOC) \
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data_section (); \
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else if (TREE_CODE (DECL) == STRING_CST) \
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{ \
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if (! flag_writable_strings) \
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const_section (); \
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else \
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data_section (); \
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} \
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else if (TREE_CODE (DECL) == VAR_DECL) \
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{ \
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if (! DECL_READONLY_SECTION (DECL, RELOC)) \
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data_section (); \
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else \
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const_section (); \
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} \
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else \
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const_section (); \
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#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
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if ((LOG) != 0) { \
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if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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}
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/* A C statement (sans semicolon) to output an element in the table of
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global constructors. */
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#undef ASM_OUTPUT_CONSTRUCTOR
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#define ASM_OUTPUT_CONSTRUCTOR(FILE, NAME) \
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do { \
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if (TARGET_ELF) \
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{ \
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ctors_section (); \
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fprintf ((FILE), "%s ", INT_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), "\n"); \
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} \
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else \
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{ \
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fprintf (asm_out_file, "%s \"%s__CTOR_LIST__\",22,0,0,", \
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ASM_STABS_OP, (TARGET_UNDERSCORES) ? "_" : ""); \
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assemble_name (asm_out_file, name); \
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fputc ('\n', asm_out_file); \
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} \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. */
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#undef ASM_OUTPUT_DESTRUCTOR
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#define ASM_OUTPUT_DESTRUCTOR(FILE, NAME) \
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do { \
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if (TARGET_ELF) \
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{ \
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dtors_section (); \
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fprintf ((FILE), "%s ", INT_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), "\n"); \
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} \
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else \
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{ \
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fprintf (asm_out_file, "%s \"%s__DTOR_LIST__\",22,0,0,", \
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ASM_STABS_OP, (TARGET_UNDERSCORES) ? "_" : ""); \
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assemble_name (asm_out_file, name); \
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fputc ('\n', asm_out_file); \
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||||
} \
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||||
} while (0)
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/* Define macro used to output shift-double opcodes when the shift
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count is in %cl. Some assemblers require %cl as an argument;
|
||||
some don't.
|
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|
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*OLD* GAS requires the %cl argument, so override i386/unix.h. */
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#undef AS3_SHIFT_DOUBLE
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#define AS3_SHIFT_DOUBLE(a,b,c,d) AS3 (a,b,c,d)
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||||
#endif
|
||||
|
||||
|
||||
/************************[ Debugger stuff ]*********************************/
|
||||
@ -691,99 +373,19 @@ Boston, MA 02111-1307, USA. */
|
||||
#undef DBX_FUNCTION_FIRST
|
||||
#define DBX_CHECK_FUNCTION_FIRST TARGET_ELF
|
||||
|
||||
/* Copy this from the svr4 specifications... */
|
||||
/* 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 version 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)
|
||||
*/
|
||||
#undef DWARF_DBX_REGISTER_NUMBER
|
||||
#define DWARF_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))
|
||||
|
||||
/* Now what stabs expects in the register. */
|
||||
#undef STABS_DBX_REGISTER_NUMBER
|
||||
#define STABS_DBX_REGISTER_NUMBER(n) \
|
||||
((n) == 0 ? 0 : \
|
||||
(n) == 1 ? 2 : \
|
||||
(n) == 2 ? 1 : \
|
||||
(n) == 3 ? 3 : \
|
||||
(n) == 4 ? 6 : \
|
||||
(n) == 5 ? 7 : \
|
||||
(n) == 6 ? 4 : \
|
||||
(n) == 7 ? 5 : \
|
||||
(n) + 4)
|
||||
|
||||
#undef DBX_REGISTER_NUMBER
|
||||
#define DBX_REGISTER_NUMBER(n) ((write_symbols == DWARF2_DEBUG \
|
||||
#define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \
|
||||
: (write_symbols == DWARF2_DEBUG \
|
||||
|| write_symbols == DWARF_DEBUG) \
|
||||
? DWARF_DBX_REGISTER_NUMBER(n) \
|
||||
: STABS_DBX_REGISTER_NUMBER(n))
|
||||
? svr4_dbx_register_map[(n)] \
|
||||
: dbx_register_map[(n)])
|
||||
|
||||
/* tag end of file in elf mode */
|
||||
#undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
|
||||
#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
|
||||
do { \
|
||||
if (TARGET_ELF) { \
|
||||
fprintf ((FILE), "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", \
|
||||
fprintf ((FILE), "\t.text\n\t.stabs \"\",%d,0,0,%LLetext\n%LLetext:\n", \
|
||||
N_SO); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user