184 lines
6.6 KiB
C
184 lines
6.6 KiB
C
/* Target definitions for GNU compiler for Sparc running System V.4
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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Written by Ron Guilmette (rfg@ncd.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "sparc.h"
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/* Undefine some symbols which are defined in "sparc.h" but which are
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appropriate only for SunOS 4.x, and not for svr4. */
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#undef DBX_DEBUGGING_INFO
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#undef WORD_SWITCH_TAKES_ARG
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#undef SELECT_SECTION
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#undef ASM_DECLARE_FUNCTION_NAME
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#undef TEXT_SECTION_ASM_OP
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#undef DATA_SECTION_ASM_OP
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#include "svr4.h"
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/* Undefined some symbols which are defined in "svr4.h" but which are
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appropriate only for typical svr4 systems, but not for the specific
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case of svr4 running on a Sparc. */
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#undef CTORS_SECTION_ASM_OP
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#undef DTORS_SECTION_ASM_OP
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#undef INIT_SECTION_ASM_OP
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#undef CONST_SECTION_ASM_OP
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#undef TYPE_OPERAND_FMT
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#undef PUSHSECTION_FORMAT
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#undef STRING_ASM_OP
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#undef COMMON_ASM_OP
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#undef SKIP_ASM_OP
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#undef DEF_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
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#undef ASM_GENERATE_INTERNAL_LABEL
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#undef ASM_OUTPUT_INTERNAL_LABEL
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/* Provide a set of pre-definitions and pre-assertions appropriate for
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the Sparc running svr4. __svr4__ is our extension. */
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#define CPP_PREDEFINES \
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"-Dsparc -Dunix -D__svr4__ -Asystem(unix) -Acpu(sparc) -Amachine(sparc)"
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/* This is the string used to begin an assembly language comment for the
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Sparc/svr4 assembler. */
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#define ASM_COMMENT_START "!"
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/* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
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Note that many of these are different from the typical pseudo-ops used
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by most svr4 assemblers. That is probably due to a (misguided?) attempt
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to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
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assembler. */
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#define STRING_ASM_OP ".asciz"
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#define COMMON_ASM_OP ".common"
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#define SKIP_ASM_OP ".skip"
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#define UNALIGNED_INT_ASM_OP ".uaword"
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#define UNALIGNED_SHORT_ASM_OP ".uahalf"
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#define PUSHSECTION_ASM_OP ".pushsection"
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#define POPSECTION_ASM_OP ".popsection"
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/* This is the format used to print the second operand of a .type pseudo-op
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for the Sparc/svr4 assembler. */
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#define TYPE_OPERAND_FMT "#%s"
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/* This is the format used to print a .pushsection pseudo-op (and its operand)
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for the Sparc/svr4 assembler. */
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#define PUSHSECTION_FORMAT "%s\t\"%s\"\n"
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/* This is how to equate one symbol to another symbol. The syntax used is
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`SYM1=SYM2'. Note that this is different from the way equates are done
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with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'. */
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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do { fprintf ((FILE), "\t"); \
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assemble_name (FILE, LABEL1); \
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fprintf (FILE, " = "); \
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assemble_name (FILE, LABEL2); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* Generate the special assembly code needed to align the start of a jump
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tables. Under svr4, jump tables go into the .rodata section. Other
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things (e.g. constants) may be put into the .rodata section too, and
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those other things may end on odd (i.e. unaligned) boundaries, so we
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need to get re-aligned just before we output each jump table. */
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#define ASM_OUTPUT_ALIGN_JUMP_TABLE(FILE) ASM_OUTPUT_ALIGN ((FILE), 2)
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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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If the NUM argument is negative, we don't use it when generating the
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label.
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For most svr4 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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however the current Sparc/svr4 assembler is brain-dammaged and it needs
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to see `.L' at the start of a symbol or else it will be put into the
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linker symbol table.
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*/
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#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
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do { \
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if ((int) (NUM) >= 0) \
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fprintf (FILE, ".L%s%d:\n", PREFIX, NUM); \
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else \
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fprintf (FILE, ".L%s:\n", PREFIX); \
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} while (0)
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/* This is how to store into the string LABEL
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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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If the NUM argument is negative, we don't use it when generating the
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label.
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For most svr4 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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however the current Sparc/svr4 assembler is brain-dammaged and it needs
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to see `.L' at the start of a symbol or else it will be put into the
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linker symbol table.
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*/
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#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
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do { \
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if ((int) (NUM) >= 0) \
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sprintf (LABEL, "*.L%s%d", PREFIX, NUM); \
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else \
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sprintf (LABEL, "*.L%s", PREFIX); \
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} while (0)
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/* Define how the Sparc registers should be numbered for Dwarf output.
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The numbering provided here should be compatible with the native
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svr4 SDB debugger in the Sparc/svr4 reference port. The numbering
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is as follows:
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Assembly name gcc internal regno Dwarf regno
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----------------------------------------------------------
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g0-g7 0-7 0-7
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o0-o7 8-15 8-15
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l0-l7 16-23 16-23
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i0-i7 24-31 24-31
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f0-f31 32-63 40-71
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*/
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#define DBX_REGISTER_NUMBER(REGNO) \
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(((REGNO) < 32) ? (REGNO) \
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: ((REGNO) < 63) ? ((REGNO) + 8) \
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: (abort (), 0))
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/* A set of symbol definitions for assembly pseudo-ops which will
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get us switched to various sections of interest. These are used
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in all places where we simply want to switch to a section, and
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*not* to push the previous section name onto the assembler's
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section names stack (as we do often in dwarfout.c). */
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#define TEXT_SECTION_ASM_OP ".section\t\".text\""
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#define DATA_SECTION_ASM_OP ".section\t\".data\""
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#define BSS_SECTION_ASM_OP ".section\t\".bss\""
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#define CONST_SECTION_ASM_OP ".section\t\".rodata\""
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#define INIT_SECTION_ASM_OP ".section\t\".init\",#alloc"
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#define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc"
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#define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc"
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