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git.ipfire.org Git - thirdparty/gcc.git/blob - gcc/config/m68k/netbsd-elf.h
1 /* Definitions of target machine for GNU compiler,
2 for m68k (including m68010) NetBSD platforms using the
4 Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
5 Contributed by Wasabi Systems. Inc.
7 This file is derived from <m68k/m68kv4.h>, <m68k/m68kelf.h>,
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 GCC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING. If not, write to
24 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
25 Boston, MA 02110-1301, USA. */
27 #define TARGET_OS_CPP_BUILTINS() \
30 NETBSD_OS_CPP_BUILTINS_ELF(); \
31 builtin_define ("__m68k__"); \
32 builtin_define ("__SVR4_ABI__"); \
33 builtin_define ("__motorola__"); \
34 if (TARGET_HARD_FLOAT) \
35 builtin_define ("__HAVE_FPU__"); \
39 /* Don't try using XFmode on the 68010. */
40 #undef LONG_DOUBLE_TYPE_SIZE
41 #define LONG_DOUBLE_TYPE_SIZE (TARGET_68020 ? 80 : 64)
43 #undef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
45 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
47 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 80
50 #undef SUBTARGET_EXTRA_SPECS
51 #define SUBTARGET_EXTRA_SPECS \
52 { "netbsd_entry_point", NETBSD_ENTRY_POINT },
56 #define TARGET_VERSION \
59 ? " (NetBSD/68010 ELF)" \
60 : " (NetBSD/m68k ELF)");
63 /* Provide a CPP_SPEC appropriate for NetBSD m68k targets. Currently we
64 deal with the GCC option '-posix', as well as an indication as to
65 whether or not use of the FPU is allowed. */
68 #define CPP_SPEC NETBSD_CPP_SPEC
71 /* Provide an ASM_SPEC appropriate for NetBSD m68k ELF targets. We need
72 to passn PIC code generation options. */
75 #define ASM_SPEC "%(asm_cpu_spec) %{fpic|fpie:-k} %{fPIC|fPIE:-k -K}"
77 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
79 /* Provide a LINK_SPEC appropriate for a NetBSD/m68k ELF target. */
82 #define LINK_SPEC NETBSD_LINK_SPEC_ELF
84 #define NETBSD_ENTRY_POINT "_start"
86 /* Output assembler code to FILE to increment profiler label # LABELNO
87 for profiling a function only. */
89 #undef FUNCTION_PROFILER
90 #define FUNCTION_PROFILER(FILE, LABELNO) \
93 asm_fprintf (FILE, "\tlea (%LLP%d,%Rpc),%Ra1\n", (LABELNO)); \
95 fprintf (FILE, "\tbsr.l __mcount@PLTPC\n"); \
97 fprintf (FILE, "\tjbsr __mcount\n"); \
102 /* Make gcc agree with <machine/ansi.h> */
105 #define SIZE_TYPE "unsigned int"
108 #define PTRDIFF_TYPE "int"
112 Here is a bunch of stuff lifted from m68kelf.h. We don't use that
113 file directly, because it has a lot of baggage we don't want. */
116 /* The prefix for register names. Note that REGISTER_NAMES
117 is supposed to include this prefix. Also note that this is NOT an
118 fprintf format string, it is a literal string. */
120 #undef REGISTER_PREFIX
121 #define REGISTER_PREFIX "%"
124 /* The prefix for local (compiler generated) lables.
125 These labels will not appear in the symbol table. */
127 #undef LOCAL_LABEL_PREFIX
128 #define LOCAL_LABEL_PREFIX "."
131 /* The prefix to add to user-visible assembler symbols. */
133 #undef USER_LABEL_PREFIX
134 #define USER_LABEL_PREFIX ""
137 #undef ASM_COMMENT_START
138 #define ASM_COMMENT_START "|"
141 /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
142 keep switch tables in the text section. */
144 #undef JUMP_TABLES_IN_TEXT_SECTION
145 #define JUMP_TABLES_IN_TEXT_SECTION 1
148 /* Use the default action for outputting the case label. */
149 #undef ASM_OUTPUT_CASE_LABEL
150 #define ASM_RETURN_CASE_JUMP \
152 if (TARGET_COLDFIRE) \
154 if (ADDRESS_REG_P (operands[0])) \
155 return "jmp %%pc@(2,%0:l)"; \
157 return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
160 return "jmp %%pc@(2,%0:w)"; \
164 /* This is how to output an assembler line that says to advance the
165 location counter to a multiple of 2**LOG bytes. */
167 #undef ASM_OUTPUT_ALIGN
168 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
172 fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \
177 /* If defined, a C expression whose value is a string containing the
178 assembler operation to identify the following data as uninitialized global
181 #define BSS_SECTION_ASM_OP ".section\t.bss"
184 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
185 separate, explicit argument. If you define this macro, it is used
186 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
187 handling the required alignment of the variable. The alignment is
188 specified as the number of bits.
190 Try to use function `asm_output_aligned_bss' defined in file
191 `varasm.c' when defining this macro. */
193 #undef ASM_OUTPUT_ALIGNED_BSS
194 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
195 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
198 #undef ASM_OUTPUT_COMMON
199 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
200 ( fputs (".comm ", (FILE)), \
201 assemble_name ((FILE), (NAME)), \
202 fprintf ((FILE), ",%u\n", (int)(SIZE)))
204 #undef ASM_OUTPUT_LOCAL
205 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
206 ( fputs (".lcomm ", (FILE)), \
207 assemble_name ((FILE), (NAME)), \
208 fprintf ((FILE), ",%u\n", (int)(SIZE)))
212 This is the end of the chunk lifted from m68kelf.h */
216 The following chunk is more or less lifted from m68kv4.h.
217 We'd like to just #include that file, but it has not yet
218 been converted to the new include style.
220 Should there be a m68kv4-abi.h ?? */
223 /* Register in which address to store a structure value is passed to a
224 function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */
226 #undef M68K_STRUCT_VALUE_REGNUM
227 #define M68K_STRUCT_VALUE_REGNUM 8
230 /* Register in which static-chain is passed to a function. The
231 default isn m68k.h is a0, but that is already the struct value
232 regnum. Make it a1 instead. */
234 #undef STATIC_CHAIN_REGNUM
235 #define STATIC_CHAIN_REGNUM 9
236 #undef M68K_STATIC_CHAIN_REG_NAME
237 #define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1"
240 /* Now to renumber registers for dbx and gdb.
241 We use the Sun-3 convention, which is:
242 floating point registers have numbers 18 to 25, not
243 16 to 23 as they do in the compiler. */
245 #undef DBX_REGISTER_NUMBER
246 #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
249 /* 1 if N is a possible register number for a function value. For
250 m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral,
251 pointer, or floating types, respectively. Reject fp0 if not using
252 a 68881 coprocessor. */
254 #undef FUNCTION_VALUE_REGNO_P
255 #define FUNCTION_VALUE_REGNO_P(N) \
256 ((N) == 0 || (N) == 8 || (TARGET_68881 && (N) == 16))
259 /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
260 more than one register. */
262 #undef NEEDS_UNTYPED_CALL
263 #define NEEDS_UNTYPED_CALL 1
266 /* Define how to generate (in the callee) the output value of a
267 function and how to find (in the caller) the value returned by a
268 function. VALTYPE is the data type of the value (as a tree). If
269 the precise function being called is known, FUNC is its
270 FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the
271 result in d0, a0, or fp0 as appropriate. */
273 #undef FUNCTION_VALUE
274 #define FUNCTION_VALUE(VALTYPE, FUNC) \
275 m68k_function_value (VALTYPE, FUNC)
278 /* Define how to find the value returned by a library function
279 assuming the value has mode MODE.
280 For m68k/SVR4 look for integer values in d0, pointer values in d0
281 (returned in both d0 and a0), and floating values in fp0. */
284 #define LIBCALL_VALUE(MODE) \
285 m68k_libcall_value (MODE)
288 /* Boundary (in *bits*) on which stack pointer should be aligned.
289 The m68k/SVR4 convention is to keep the stack pointer longword aligned. */
291 #undef STACK_BOUNDARY
292 #define STACK_BOUNDARY 32
295 /* Alignment of field after `int : 0' in a structure.
296 For m68k/SVR4, this is the next longword boundary. */
298 #undef EMPTY_FIELD_BOUNDARY
299 #define EMPTY_FIELD_BOUNDARY 32
302 /* No data type wants to be aligned rounder than this.
303 For m68k/SVR4, some types (doubles for example) are aligned on 8 byte
306 #undef BIGGEST_ALIGNMENT
307 #define BIGGEST_ALIGNMENT 64
310 /* The svr4 ABI for the m68k says that records and unions are returned
313 #undef DEFAULT_PCC_STRUCT_RETURN
314 #define DEFAULT_PCC_STRUCT_RETURN 1
316 /* Output assembler code for a block containing the constant parts
317 of a trampoline, leaving space for the variable parts. */
319 /* On m68k svr4, the trampoline is different from the generic version
320 in that we use a1 as the static call chain. */
322 #undef TRAMPOLINE_TEMPLATE
323 #define TRAMPOLINE_TEMPLATE(FILE) \
325 assemble_aligned_integer (2, GEN_INT (0x227a)); \
326 assemble_aligned_integer (2, GEN_INT (8)); \
327 assemble_aligned_integer (2, GEN_INT (0x2f3a)); \
328 assemble_aligned_integer (2, GEN_INT (8)); \
329 assemble_aligned_integer (2, GEN_INT (0x4e75)); \
330 assemble_aligned_integer (4, const0_rtx); \
331 assemble_aligned_integer (4, const0_rtx); \
334 /* Redefine since we are using a different trampoline */
335 #undef TRAMPOLINE_SIZE
336 #define TRAMPOLINE_SIZE 18
338 /* Emit RTL insns to initialize the variable parts of a trampoline.
339 FNADDR is an RTX for the address of the function's pure code.
340 CXT is an RTX for the static chain value for the function. */
342 #undef INITIALIZE_TRAMPOLINE
343 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
345 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 10)), CXT); \
346 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 14)), FNADDR); \
351 This is the end of the chunk lifted from m68kv4.h */