Viewing file:  netbsd-elf.h (8.37 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Definitions of target machine for GNU compiler,
for m68k (including m68010) NetBSD platforms using the
ELF object format.
Copyright (C) 2002-2022 Free Software Foundation, Inc.
Contributed by Wasabi Systems. Inc.
This file is derived from <m68k/m68kv4.h>, <m68k/m68kelf.h>,
and <m68k/linux.h>.
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 3, 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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
NETBSD_OS_CPP_BUILTINS_ELF(); \
builtin_define ("__m68k__"); \
builtin_define ("__SVR4_ABI__"); \
builtin_define ("__motorola__"); \
if (TARGET_HARD_FLOAT) \
builtin_define ("__HAVE_FPU__"); \
} \
while (0)
/* Don't try using XFmode on the 68010. */
#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE (TARGET_68020 ? 80 : 64)
#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
{ "netbsd_entry_point", NETBSD_ENTRY_POINT },
/* Provide a CPP_SPEC appropriate for NetBSD m68k targets. Currently we
deal with the GCC option '-posix', as well as an indication as to
whether or not use of the FPU is allowed. */
#undef CPP_SPEC
#define CPP_SPEC NETBSD_CPP_SPEC
/* Provide an ASM_SPEC appropriate for NetBSD m68k ELF targets. We need
to pass PIC code generation options. */
#undef ASM_SPEC
#define ASM_SPEC \
"%(asm_cpu_spec) %{" FPIE1_OR_FPIC1_SPEC ":-k} %{" FPIE2_OR_FPIC2_SPEC ":-k -K}"
/* Provide a LINK_SPEC appropriate for a NetBSD/m68k ELF target. */
#undef LINK_SPEC
#define LINK_SPEC NETBSD_LINK_SPEC_ELF
#define NETBSD_ENTRY_POINT "_start"
/* Output assembler code to FILE to increment profiler label # LABELNO
for profiling a function only. */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO) \
do \
{ \
asm_fprintf (FILE, "\tlea (%LLP%d,%Rpc),%Ra1\n", (LABELNO)); \
if (flag_pic) \
fprintf (FILE, "\tbsr.l __mcount@PLTPC\n"); \
else \
fprintf (FILE, "\tjbsr __mcount\n"); \
} \
while (0)
/* Make gcc agree with <machine/ansi.h> */
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
/* XXX
Here is a bunch of stuff lifted from m68kelf.h. We don't use that
file directly, because it has a lot of baggage we don't want. */
/* 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) lables.
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 ""
#undef ASM_COMMENT_START
#define ASM_COMMENT_START "|"
/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
keep switch tables in the text section. */
#undef JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION 1
/* Use the default action for outputting the case label. */
#undef ASM_OUTPUT_CASE_LABEL
#define ASM_RETURN_CASE_JUMP \
do { \
if (TARGET_COLDFIRE) \
{ \
if (ADDRESS_REG_P (operands[0])) \
return "jmp %%pc@(2,%0:l)"; \
else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \
return "jmp %%pc@(2,%0:l)"; \
else \
return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
} \
else if (TARGET_LONG_JUMP_TABLE_OFFSETS) \
return "jmp %%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)
/* If defined, a C expression whose value is a string containing the
assembler operation to identify the following data as uninitialized global
data. */
#define BSS_SECTION_ASM_OP ".section\t.bss"
#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
#undef ASM_OUTPUT_COMMON
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
( fputs (".comm ", (FILE)), \
assemble_name ((FILE), (NAME)), \
fprintf ((FILE), ",%u\n", (int)(SIZE)))
#undef ASM_OUTPUT_LOCAL
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
( fputs (".lcomm ", (FILE)), \
assemble_name ((FILE), (NAME)), \
fprintf ((FILE), ",%u\n", (int)(SIZE)))
/* XXX
This is the end of the chunk lifted from m68kelf.h */
/* XXX
The following chunk is more or less lifted from m68kv4.h.
We'd like to just #include that file, but it has not yet
been converted to the new include style.
Should there be a m68kv4-abi.h ?? */
/* 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 A0_REG
/* Register in which static-chain is passed to a function. The
default isn m68k.h is a0, but that is already the struct value
regnum. Make it a1 instead. */
#undef STATIC_CHAIN_REGNUM
#define STATIC_CHAIN_REGNUM A1_REG
#undef M68K_STATIC_CHAIN_REG_NAME
#define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1"
/* Now to renumber registers for dbx and gdb.
We use the Sun-3 convention, which is:
floating point registers have numbers 18 to 25, not
16 to 23 as they do in the compiler. */
#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
/* 1 if N is a possible register number for a function value. For
m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral,
pointer, or floating types, respectively. Reject fp0 if not using
a 68881 coprocessor. */
#undef FUNCTION_VALUE_REGNO_P
#define FUNCTION_VALUE_REGNO_P(N) \
((N) == D0_REG || (N) == A0_REG || (TARGET_68881 && (N) == FP0_REG))
/* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
more than one register. */
#undef NEEDS_UNTYPED_CALL
#define NEEDS_UNTYPED_CALL 1
/* Define how to generate (in the callee) the output value of a
function and how to find (in the caller) the value returned by a
function. VALTYPE is the data type of the value (as a tree). If
the precise function being called is known, FUNC is its
FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the
result in d0, a0, or fp0 as appropriate. */
#undef FUNCTION_VALUE
#define FUNCTION_VALUE(VALTYPE, FUNC) \
m68k_function_value (VALTYPE, FUNC)
/* Define how to find the value returned by a library function
assuming the value has mode MODE.
For m68k/SVR4 look for integer values in d0, pointer values in d0
(returned in both d0 and a0), and floating values in fp0. */
#undef LIBCALL_VALUE
#define LIBCALL_VALUE(MODE) \
m68k_libcall_value (MODE)
/* Boundary (in *bits*) on which stack pointer should be aligned.
The m68k/SVR4 convention is to keep the stack pointer longword aligned. */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 32
/* Alignment of field after `int : 0' in a structure.
For m68k/SVR4, this is the next longword boundary. */
#undef EMPTY_FIELD_BOUNDARY
#define EMPTY_FIELD_BOUNDARY 32
/* No data type wants to be aligned rounder than this.
For m68k/SVR4, some types (doubles for example) are aligned on 8 byte
boundaries */
#undef BIGGEST_ALIGNMENT
#define BIGGEST_ALIGNMENT 64
/* The svr4 ABI for the m68k says that records and unions are returned
in memory. */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 1
/* XXX
This is the end of the chunk lifted from m68kv4.h */
|
