/* m68kelf support, derived from m68kv4.h */ /* Target definitions for GNU compiler for mc680x0 running System V.4 Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com). This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef SWBEG_ASM_OP #define SWBEG_ASM_OP "\t.swbeg\t" #endif /* Here are four prefixes that are used by asm_fprintf to facilitate customization for alternate assembler syntaxes. Machines with no likelihood of an alternate syntax need not define these and need not use asm_fprintf. */ /* The prefix for register names. Note that REGISTER_NAMES is supposed to include this prefix. Also note that this is NOT an fprintf format string, it is a literal string */ #undef REGISTER_PREFIX #define REGISTER_PREFIX "%" /* The prefix for local (compiler generated) labels. These labels will not appear in the symbol table. */ #undef LOCAL_LABEL_PREFIX #define LOCAL_LABEL_PREFIX "." /* The prefix to add to user-visible assembler symbols. */ #undef USER_LABEL_PREFIX #define USER_LABEL_PREFIX "" /* The prefix for immediate operands. */ #undef IMMEDIATE_PREFIX #define IMMEDIATE_PREFIX "#" /* In the machine description we can't use %R, because it will not be seen by ASM_FPRINTF. (Isn't that a design bug?). */ #undef REGISTER_PREFIX_MD #define REGISTER_PREFIX_MD "%%" /* config/m68k.md has an explicit reference to the program counter, prefix this by the register prefix. */ #define ASM_RETURN_CASE_JUMP \ do { \ if (TARGET_COLDFIRE) \ { \ if (ADDRESS_REG_P (operands[0])) \ return "jmp %%pc@(2,%0:l)"; \ else \ return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ } \ else \ return "jmp %%pc@(2,%0:w)"; \ } while (0) /* This is how to output an assembler line that says to advance the location counter to a multiple of 2**LOG bytes. */ #undef ASM_OUTPUT_ALIGN #define ASM_OUTPUT_ALIGN(FILE,LOG) \ do { \ if ((LOG) > 0) \ fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \ } while (0) /* Use proper assembler syntax for these macros. */ #undef ASM_OUTPUT_REG_PUSH #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ asm_fprintf (FILE, "\t%Omove.l %s,-(%Rsp)\n", reg_names[REGNO]) #undef ASM_OUTPUT_REG_POP #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ asm_fprintf (FILE, "\t%Omove.l (%Rsp)+,%s\n", reg_names[REGNO]) /* Override the definition of NO_DOLLAR_IN_LABEL in svr4.h, for special g++ assembler names. When this is defined, g++ uses embedded '.' characters and some m68k assemblers have problems with this. The chances are much greater that any particular assembler will permit embedded '$' characters. */ #undef NO_DOLLAR_IN_LABEL /* Define PCC_STATIC_STRUCT_RETURN if the convention on the target machine is to use the nonreentrant technique for returning structure and union values, as commonly implemented by the AT&T Portable C Compiler (PCC). When defined, the gcc option -fpcc-struct-return can be used to cause this form to be generated. When undefined, the option does nothing. For m68k SVR4, the convention is to use a reentrant technique compatible with the gcc default, so override the definition of this macro in m68k.h */ #undef PCC_STATIC_STRUCT_RETURN /* Local common symbols are declared to the assembler with ".lcomm" rather than ".bss", so override the definition in svr4.h */ #undef BSS_ASM_OP #define BSS_ASM_OP "\t.lcomm\t" /* Register in which address to store a structure value is passed to a function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */ #undef M68K_STRUCT_VALUE_REGNUM #define M68K_STRUCT_VALUE_REGNUM 8 #define ASM_COMMENT_START "|" /* Define how the m68k registers should be numbered for Dwarf output. The numbering provided here should be compatible with the native SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7 are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23. */ #undef DBX_REGISTER_NUMBER #define DBX_REGISTER_NUMBER(REGNO) (REGNO) /* The ASM_OUTPUT_SKIP macro is first defined in m68k.h, using ".skip". It is then overridden by m68k/sgs.h to use ".space", and again by svr4.h to use ".zero". The m68k/SVR4 assembler uses ".space", so repeat the definition from m68k/sgs.h here. Note that ASM_NO_SKIP_IN_TEXT is defined in m68k/sgs.h, so we don't have to repeat it here. */ #undef ASM_OUTPUT_SKIP #define ASM_OUTPUT_SKIP(FILE,SIZE) \ fprintf (FILE, "%s%u\n", SPACE_ASM_OP, (int)(SIZE)) #if 0 /* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for 1 byte alignment. Don't generate alignment for COMMON seems to be safer until we the assembler is fixed. */ #undef ASM_OUTPUT_ALIGNED_COMMON /* Same problem with this one. */ #undef ASM_OUTPUT_ALIGNED_LOCAL #endif /* The `string' directive on m68k svr4 does not handle string with escape char (i.e., `\') right. Use normal way to output ASCII bytes seems to be safer. */ #undef ASM_OUTPUT_ASCII #define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \ do { \ register int sp = 0, ch; \ fputs (integer_asm_op (1, TRUE), (FILE)); \ do { \ ch = (PTR)[sp]; \ if (ch > ' ' && ! (ch & 0x80) && ch != '\\') \ { \ fprintf ((FILE), "'%c", ch); \ } \ else \ { \ fprintf ((FILE), "0x%x", ch); \ } \ if (++sp < (LEN)) \ { \ if ((sp % 10) == 0) \ { \ fprintf ((FILE), "\n%s", integer_asm_op (1, TRUE)); \ } \ else \ { \ putc (',', (FILE)); \ } \ } \ } while (sp < (LEN)); \ putc ('\n', (FILE)); \ } while (0) #undef ASM_OUTPUT_COMMON #undef ASM_OUTPUT_LOCAL #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ ( fputs (".comm ", (FILE)), \ assemble_name ((FILE), (NAME)), \ fprintf ((FILE), ",%u\n", (int)(SIZE))) #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ ( fputs (".lcomm ", (FILE)), \ assemble_name ((FILE), (NAME)), \ fprintf ((FILE), ",%u\n", (int)(SIZE))) /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to keep switch tables in the text section. */ #define JUMP_TABLES_IN_TEXT_SECTION 1 /* Override the definition in svr4.h. In m68k svr4, using swbeg is the standard way to do switch table. */ #undef ASM_OUTPUT_BEFORE_CASE_LABEL #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1)); /* end of stuff from m68kv4.h */ #undef ENDFILE_SPEC #define ENDFILE_SPEC "crtend.o%s" #undef STARTFILE_SPEC #define STARTFILE_SPEC "crtbegin.o%s" /* If defined, a C expression whose value is a string containing the assembler operation to identify the following data as uninitialized global data. If not defined, and neither `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, uninitialized global data will be output in the data section if `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be used. */ #ifndef BSS_SECTION_ASM_OP #define BSS_SECTION_ASM_OP "\t.section\t.bss" #endif /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate, explicit argument. If you define this macro, it is used in place of `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required alignment of the variable. The alignment is specified as the number of bits. Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when defining this macro. */ #ifndef ASM_OUTPUT_ALIGNED_BSS #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) #endif