| /* 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 |