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- /* Target definitions for GNU compiler for Sparc running System V.4
- Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-
- Written by Ron Guilmette (rfg@ncd.com).
-
- This file is part of GNU CC.
-
- GNU CC 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)
- any later version.
-
- GNU CC 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "sparc/sparc.h"
-
- /* Undefine some symbols which are defined in "sparc.h" but which are
- appropriate only for SunOS 4.x, and not for svr4. */
-
- #undef DBX_DEBUGGING_INFO
- #undef WORD_SWITCH_TAKES_ARG
- #undef SELECT_SECTION
- #undef ASM_DECLARE_FUNCTION_NAME
- #undef TEXT_SECTION_ASM_OP
- #undef DATA_SECTION_ASM_OP
-
- #include "svr4.h"
-
- /* Undefined some symbols which are defined in "svr4.h" but which are
- appropriate only for typical svr4 systems, but not for the specific
- case of svr4 running on a Sparc. */
-
- #undef CTORS_SECTION_ASM_OP
- #undef DTORS_SECTION_ASM_OP
- #undef INIT_SECTION_ASM_OP
- #undef CONST_SECTION_ASM_OP
- #undef TYPE_OPERAND_FMT
- #undef PUSHSECTION_FORMAT
- #undef STRING_ASM_OP
- #undef COMMON_ASM_OP
- #undef SKIP_ASM_OP
- #undef SET_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
-
- /* Provide a set of pre-definitions and pre-assertions appropriate for
- the Sparc running svr4. __svr4__ is our extension. */
-
- #define CPP_PREDEFINES \
- "-Dsparc -Dunix -D__svr4__ \
- -Asystem(unix) -Asystem(svr4) -Acpu(sparc) -Amachine(sparc) \
- -D__GCC_NEW_VARARGS__"
-
- /* The specialized code which needs to appear in the .init section prior
- to the prologue code for `__do_global_ctors' (see crtstuff.c).
-
- On Sparcs running svr4, the /usr/ccs/lib/crti.o file (with gets linked
- in prior to the crtbegin.o file) has a single `save' instruction in its
- .init section. That `save' instruction tries to setup a stack frame for
- the sake of any subsequent code in the .init section. Unfortunately,
- the size it uses for the stack frame is only a guess, and is not really
- adequate for our purposes. More importantly, we independently put our
- own standard function prologue (for __do_global_ctors) into the .init
- section and that function prologue includes its own `save' instruction!
- Thus, unless we do something to correct the situation, we'll get *two*
- stack frames allocated when crt0.o calls the code in the .init section,
- and havoc will ensue. The following macro definition prevents such woes.
- */
-
- #define INIT_SECTION_PREAMBLE asm ("restore")
-
- /* This is the string used to begin an assembly language comment for the
- Sparc/svr4 assembler. */
-
- #define ASM_COMMENT_START "!"
-
- /* Define the names of various pseudo-op used by the Sparc/svr4 assembler.
- Note that many of these are different from the typical pseudo-ops used
- by most svr4 assemblers. That is probably due to a (misguided?) attempt
- to keep the Sparc/svr4 assembler somewhat compatible with the Sparc/SunOS
- assembler. */
-
- #define STRING_ASM_OP ".asciz"
- #define COMMON_ASM_OP ".common"
- #define SKIP_ASM_OP ".skip"
- #define UNALIGNED_INT_ASM_OP ".uaword"
- #define UNALIGNED_SHORT_ASM_OP ".uahalf"
- #define PUSHSECTION_ASM_OP ".pushsection"
- #define POPSECTION_ASM_OP ".popsection"
-
- /* This is the format used to print the second operand of a .type pseudo-op
- for the Sparc/svr4 assembler. */
-
- #define TYPE_OPERAND_FMT "#%s"
-
- /* This is the format used to print a .pushsection pseudo-op (and its operand)
- for the Sparc/svr4 assembler. */
-
- #define PUSHSECTION_FORMAT "\t%s\t\"%s\"\n"
-
- #undef ASM_OUTPUT_CASE_LABEL
- #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
- do { ASM_OUTPUT_ALIGN ((FILE), 2); \
- ASM_OUTPUT_INTERNAL_LABEL ((FILE), PREFIX, NUM); \
- } while (0)
-
- /* This is how to equate one symbol to another symbol. The syntax used is
- `SYM1=SYM2'. Note that this is different from the way equates are done
- with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'. */
-
- #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
- do { fprintf ((FILE), "\t"); \
- assemble_name (FILE, LABEL1); \
- fprintf (FILE, " = "); \
- assemble_name (FILE, LABEL2); \
- fprintf (FILE, "\n"); \
- } while (0)
-
- /* Define how the Sparc registers should be numbered for Dwarf output.
- The numbering provided here should be compatible with the native
- svr4 SDB debugger in the Sparc/svr4 reference port. The numbering
- is as follows:
-
- Assembly name gcc internal regno Dwarf regno
- ----------------------------------------------------------
- g0-g7 0-7 0-7
- o0-o7 8-15 8-15
- l0-l7 16-23 16-23
- i0-i7 24-31 24-31
- f0-f31 32-63 40-71
- */
-
- #define DBX_REGISTER_NUMBER(REGNO) \
- (((REGNO) < 32) ? (REGNO) \
- : ((REGNO) < 63) ? ((REGNO) + 8) \
- : (abort (), 0))
-
- /* A set of symbol definitions for assembly pseudo-ops which will
- get us switched to various sections of interest. These are used
- in all places where we simply want to switch to a section, and
- *not* to push the previous section name onto the assembler's
- section names stack (as we do often in dwarfout.c). */
-
- #define TEXT_SECTION_ASM_OP ".section\t\".text\""
- #define DATA_SECTION_ASM_OP ".section\t\".data\""
- #define BSS_SECTION_ASM_OP ".section\t\".bss\""
- #define CONST_SECTION_ASM_OP ".section\t\".rodata\""
- #define INIT_SECTION_ASM_OP ".section\t\".init\",#alloc"
- #define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc"
- #define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc"
-
- /* If the host and target formats match, output the floats as hex. */
- #if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
- #if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN
-
- /* This is how to output assembly code to define a `float' constant.
- We always have to use a .long pseudo-op to do this because the native
- SVR4 ELF assembler is buggy and it generates incorrect values when we
- try to use the .float pseudo-op instead. */
-
- #undef ASM_OUTPUT_FLOAT
- #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
- do { long value; \
- REAL_VALUE_TO_TARGET_SINGLE ((VALUE), value); \
- fprintf((FILE), "\t.long\t0x%x\n", value); \
- } while (0)
-
- /* This is how to output assembly code to define a `double' constant.
- We always have to use a pair of .long pseudo-ops to do this because
- the native SVR4 ELF assembler is buggy and it generates incorrect
- values when we try to use the the .double pseudo-op instead. */
-
- #undef ASM_OUTPUT_DOUBLE
- #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
- do { long value[2]; \
- REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), value); \
- fprintf((FILE), "\t.long\t0x%x\n", value[0]); \
- fprintf((FILE), "\t.long\t0x%x\n", value[1]); \
- } while (0)
-
- #endif /* word order matches */
- #endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
-
- /* This is how to output an assembler line defining a `long double'
- constant. */
-
- #undef ASM_OUTPUT_LONG_DOUBLE
- #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE) \
- do { long value[4]; \
- REAL_VALUE_TO_TARGET_LONG_DOUBLE ((VALUE), value); \
- fprintf((FILE), "\t.long\t0x%x\n", value[0]); \
- fprintf((FILE), "\t.long\t0x%x\n", value[1]); \
- fprintf((FILE), "\t.long\t0x%x\n", value[2]); \
- fprintf((FILE), "\t.long\t0x%x\n", value[3]); \
- } while (0)
-