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222 lines
8.5 KiB
C
222 lines
8.5 KiB
C
/* Target definitions for GNU compiler for Sparc running System V.4
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Copyright (C) 1991, 92, 95, 96, 97, 1998 Free Software Foundation, Inc.
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Contributed by Ron Guilmette (rfg@monkeys.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, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "sparc/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 WORD_SWITCH_TAKES_ARG
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#undef ASM_OUTPUT_SOURCE_LINE
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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 INIT_SECTION_ASM_OP
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#undef FINI_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 SET_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
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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) -Asystem(svr4)"
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/* The native assembler can't compute differences between symbols in different
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sections when generating pic code, so we must put jump tables in the
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text section. */
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#define JUMP_TABLES_IN_TEXT_SECTION 1
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/* Pass -K to the assembler when PIC. */
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#undef ASM_SPEC
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#define ASM_SPEC \
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"%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
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%{fpic:-K PIC} %{fPIC:-K PIC} %(asm_cpu)"
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/* Must use data section for relocatable constants when pic. */
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#undef SELECT_RTX_SECTION
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#define SELECT_RTX_SECTION(MODE,RTX) \
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{ \
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if (flag_pic && symbolic_operand (RTX)) \
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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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/* 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_DOUBLE_INT_ASM_OP ".uaxword"
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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 defined in sparc.h but is not used by svr4.h. */
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#undef ASM_LONG
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#define ASM_LONG ".long"
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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 "\t%s\t\"%s\"\n"
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#undef ASM_OUTPUT_CASE_LABEL
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#define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
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do { ASM_OUTPUT_ALIGN ((FILE), Pmode == SImode ? 2 : 3); \
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ASM_OUTPUT_INTERNAL_LABEL ((FILE), PREFIX, NUM); \
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} while (0)
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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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/* 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) ((REGNO) < 32 ? (REGNO) : (REGNO) + 8)
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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\""
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#define FINI_SECTION_ASM_OP ".section\t\".fini\""
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/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
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Note that we want to give these sections the SHF_WRITE attribute
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because these sections will actually contain data (i.e. tables of
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addresses of functions in the current root executable or shared library
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file) and, in the case of a shared library, the relocatable addresses
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will have to be properly resolved/relocated (and then written into) by
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the dynamic linker when it actually attaches the given shared library
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to the executing process. (Note that on SVR4, you may wish to use the
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`-z text' option to the ELF linker, when building a shared library, as
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an additional check that you are doing everything right. But if you do
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use the `-z text' option when building a shared library, you will get
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errors unless the .ctors and .dtors sections are marked as writable
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via the SHF_WRITE attribute.) */
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#undef CTORS_SECTION_ASM_OP
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#define CTORS_SECTION_ASM_OP ".section\t\".ctors\",#alloc,#write"
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#undef DTORS_SECTION_ASM_OP
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#define DTORS_SECTION_ASM_OP ".section\t\".dtors\",#alloc,#write"
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#undef EH_FRAME_SECTION_ASM_OP
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#define EH_FRAME_SECTION_ASM_OP ".section\t\".eh_frame\",#alloc,#write"
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/* A C statement to output something to the assembler file to switch to section
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NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
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NULL_TREE. Some target formats do not support arbitrary sections. Do not
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define this macro in such cases. */
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#undef ASM_OUTPUT_SECTION_NAME /* Override svr4.h's definition. */
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#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
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do { \
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if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
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fprintf (FILE, ".section\t\"%s%s\",#alloc,#execinstr\n", \
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flag_function_sections ? ".text%" : "", (NAME)); \
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else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
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fprintf (FILE, ".section\t\"%s\",#alloc\n", (NAME)); \
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else \
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fprintf (FILE, ".section\t\"%s\",#alloc,#write\n", (NAME)); \
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} while (0)
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/* Output assembler code to FILE to initialize this source file's
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basic block profiling info, if that has not already been done. */
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#undef FUNCTION_BLOCK_PROFILER
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#define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
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do { \
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fprintf (FILE, "\tsethi %%hi(.LLPBX0),%%o0\n\tld [%%lo(.LLPBX0)+%%o0],%%o1\n\ttst %%o1\n\tbne LPY%d\n\tadd %%o0,%%lo(.LLPBX0),%%o0\n\tcall __bb_init_func\n\tnop\nLPY%d:\n", \
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(LABELNO), (LABELNO)); \
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} while (0)
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/* Output assembler code to FILE to increment the entry-count for
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the BLOCKNO'th basic block in this source file. */
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#undef BLOCK_PROFILER
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#define BLOCK_PROFILER(FILE, BLOCKNO) \
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{ \
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int blockn = (BLOCKNO); \
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fprintf (FILE, "\tsethi %%hi(.LLPBX2+%d),%%g1\n\tld [%%lo(.LLPBX2+%d)+%%g1],%%g2\n\
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\tadd %%g2,1,%%g2\n\tst %%g2,[%%lo(.LLPBX2+%d)+%%g1]\n", \
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4 * blockn, 4 * blockn, 4 * blockn); \
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}
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/* A C statement (sans semicolon) to output to the stdio stream
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FILE the assembler definition of uninitialized global DECL named
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NAME whose size is SIZE bytes and alignment is ALIGN bytes.
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Try to use asm_output_aligned_bss to implement this macro. */
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#undef ASM_OUTPUT_ALIGNED_BSS
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#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
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