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956d6950 JL |
1 | /* Definitions for Motorola 68k running Linux-based GNU systems with |
2 | ELF format. | |
2f83c7d6 | 3 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2006, |
12eb1a9c | 4 | 2007, 2009, 2010, 2011 Free Software Foundation, Inc. |
8291155f | 5 | |
7ec022b2 | 6 | This file is part of GCC. |
8291155f | 7 | |
7ec022b2 | 8 | GCC is free software; you can redistribute it and/or modify |
8291155f | 9 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
8291155f RK |
11 | any later version. |
12 | ||
7ec022b2 | 13 | GCC is distributed in the hope that it will be useful, |
8291155f RK |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
8291155f | 21 | |
57809813 | 22 | /* Add %(asm_cpu_spec) to a generic definition of ASM_SPEC. */ |
0c004537 | 23 | #undef ASM_SPEC |
c75d884b | 24 | #define ASM_SPEC "%(asm_cpu_spec) %(asm_pcrel_spec)" |
0c004537 | 25 | |
bd7993c8 RZ |
26 | #undef PREFERRED_STACK_BOUNDARY |
27 | #define PREFERRED_STACK_BOUNDARY 32 | |
28 | ||
270eeaa5 RK |
29 | /* for 68k machines this only needs to be TRUE for the 68000 */ |
30 | ||
3b4b85c9 | 31 | #undef STRICT_ALIGNMENT |
270eeaa5 | 32 | #define STRICT_ALIGNMENT 0 |
1c445f03 NS |
33 | #undef M68K_HONOR_TARGET_STRICT_ALIGNMENT |
34 | #define M68K_HONOR_TARGET_STRICT_ALIGNMENT 0 | |
270eeaa5 | 35 | |
8291155f RK |
36 | /* Here are four prefixes that are used by asm_fprintf to |
37 | facilitate customization for alternate assembler syntaxes. | |
38 | Machines with no likelihood of an alternate syntax need not | |
39 | define these and need not use asm_fprintf. */ | |
40 | ||
41 | /* The prefix for register names. Note that REGISTER_NAMES | |
42 | is supposed to include this prefix. Also note that this is NOT an | |
43 | fprintf format string, it is a literal string */ | |
44 | ||
45 | #undef REGISTER_PREFIX | |
46 | #define REGISTER_PREFIX "%" | |
47 | ||
48 | /* The prefix for local (compiler generated) labels. | |
7a1929e1 | 49 | These labels will not appear in the symbol table. */ |
8291155f RK |
50 | |
51 | #undef LOCAL_LABEL_PREFIX | |
52 | #define LOCAL_LABEL_PREFIX "." | |
53 | ||
7a1929e1 | 54 | /* The prefix to add to user-visible assembler symbols. */ |
8291155f RK |
55 | |
56 | #undef USER_LABEL_PREFIX | |
57 | #define USER_LABEL_PREFIX "" | |
58 | ||
0a22948f RK |
59 | #define ASM_COMMENT_START "|" |
60 | ||
a7fbe404 | 61 | /* Target OS builtins. */ |
107fd1c1 | 62 | #define TARGET_OS_CPP_BUILTINS() GNU_USER_TARGET_OS_CPP_BUILTINS() |
4e2e315f | 63 | |
8291155f | 64 | #undef CPP_SPEC |
59fbf3cb | 65 | #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" |
8291155f | 66 | |
956d6950 | 67 | /* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support |
8291155f RK |
68 | for the special GCC options -static and -shared, which allow us to |
69 | link things in one of these three modes by applying the appropriate | |
83c2a9ef | 70 | combinations of options at link-time. |
8291155f RK |
71 | |
72 | When the -shared link option is used a final link is not being | |
73 | done. */ | |
74 | ||
7bd85ce0 JM |
75 | #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1" |
76 | ||
85dbf7e2 | 77 | #undef LINK_SPEC |
e91bc805 RK |
78 | #define LINK_SPEC "-m m68kelf %{shared} \ |
79 | %{!shared: \ | |
89d9619d | 80 | %{!static: \ |
e91bc805 | 81 | %{rdynamic:-export-dynamic} \ |
107fd1c1 | 82 | -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \ |
e91bc805 | 83 | %{static}}" |
8291155f RK |
84 | |
85 | /* For compatibility with linux/a.out */ | |
86 | ||
87 | #undef PCC_BITFIELD_TYPE_MATTERS | |
88 | ||
89 | /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to | |
90 | keep switch tables in the text section. */ | |
91 | ||
92 | #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
93 | ||
94 | /* Use the default action for outputting the case label. */ | |
95 | #undef ASM_OUTPUT_CASE_LABEL | |
c1c1d123 AS |
96 | #define ASM_RETURN_CASE_JUMP \ |
97 | do { \ | |
9425fb04 | 98 | if (TARGET_COLDFIRE) \ |
c1c1d123 AS |
99 | { \ |
100 | if (ADDRESS_REG_P (operands[0])) \ | |
101 | return "jmp %%pc@(2,%0:l)"; \ | |
102 | else \ | |
103 | return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ | |
104 | } \ | |
105 | else \ | |
106 | return "jmp %%pc@(2,%0:w)"; \ | |
9fb9ea4a | 107 | } while (0) |
8291155f RK |
108 | |
109 | /* This is how to output an assembler line that says to advance the | |
110 | location counter to a multiple of 2**LOG bytes. */ | |
111 | ||
112 | #undef ASM_OUTPUT_ALIGN | |
113 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
114 | if ((LOG) > 0) \ | |
016c8440 | 115 | fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); |
8291155f | 116 | |
bdf3e90e RK |
117 | /* If defined, a C expression whose value is a string containing the |
118 | assembler operation to identify the following data as uninitialized global | |
119 | data. */ | |
120 | ||
6e7b07a7 | 121 | #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
bdf3e90e RK |
122 | |
123 | /* A C statement (sans semicolon) to output to the stdio stream | |
09ea387b | 124 | FILE the assembler definition of uninitialized global DECL named |
bdf3e90e RK |
125 | NAME whose size is SIZE bytes and alignment is ALIGN bytes. |
126 | Try to use asm_output_aligned_bss to implement this macro. */ | |
127 | ||
09ea387b DE |
128 | #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ |
129 | asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
bdf3e90e | 130 | |
8291155f RK |
131 | /* Output assembler code to FILE to increment profiler label # LABELNO |
132 | for profiling a function entry. */ | |
90f5494c | 133 | #define NO_PROFILE_COUNTERS 1 |
8291155f RK |
134 | #undef FUNCTION_PROFILER |
135 | #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
136 | { \ | |
8291155f RK |
137 | if (flag_pic) \ |
138 | fprintf (FILE, "\tbsr.l _mcount@PLTPC\n"); \ | |
139 | else \ | |
140 | fprintf (FILE, "\tjbsr _mcount\n"); \ | |
141 | } | |
142 | ||
8291155f RK |
143 | /* Do not break .stabs pseudos into continuations. */ |
144 | ||
145 | #define DBX_CONTIN_LENGTH 0 | |
146 | ||
8291155f RK |
147 | /* 1 if N is a possible register number for a function value. For |
148 | m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral, | |
149 | pointer, or floating types, respectively. Reject fp0 if not using | |
150 | a 68881 coprocessor. */ | |
151 | ||
152 | #undef FUNCTION_VALUE_REGNO_P | |
153 | #define FUNCTION_VALUE_REGNO_P(N) \ | |
3bfe36dc | 154 | ((N) == D0_REG || (N) == A0_REG || (TARGET_68881 && (N) == FP0_REG)) |
8291155f RK |
155 | |
156 | /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for | |
157 | more than one register. */ | |
158 | ||
159 | #undef NEEDS_UNTYPED_CALL | |
160 | #define NEEDS_UNTYPED_CALL 1 | |
161 | ||
162 | /* Define how to generate (in the callee) the output value of a | |
163 | function and how to find (in the caller) the value returned by a | |
164 | function. VALTYPE is the data type of the value (as a tree). If | |
165 | the precise function being called is known, FUNC is its | |
166 | FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the | |
7a1929e1 | 167 | result in d0, a0, or fp0 as appropriate. */ |
3b4b85c9 | 168 | |
8291155f RK |
169 | #undef FUNCTION_VALUE |
170 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
dcc21c4c | 171 | m68k_function_value (VALTYPE, FUNC) |
8291155f | 172 | |
8291155f RK |
173 | /* Define how to find the value returned by a library function |
174 | assuming the value has mode MODE. | |
175 | For m68k/SVR4 look for integer values in d0, pointer values in d0 | |
176 | (returned in both d0 and a0), and floating values in fp0. */ | |
177 | ||
178 | #undef LIBCALL_VALUE | |
179 | #define LIBCALL_VALUE(MODE) \ | |
dcc21c4c | 180 | m68k_libcall_value (MODE) |
8291155f | 181 | |
8291155f | 182 | /* For m68k SVR4, structures are returned using the reentrant |
7a1929e1 | 183 | technique. */ |
8291155f RK |
184 | #undef PCC_STATIC_STRUCT_RETURN |
185 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
d649cc96 | 186 | |
31fa03e5 | 187 | /* Finalize the trampoline by flushing the insn cache. */ |
f12d26af | 188 | |
31fa03e5 RK |
189 | #undef FINALIZE_TRAMPOLINE |
190 | #define FINALIZE_TRAMPOLINE(TRAMP) \ | |
1d8eaa6b | 191 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"), \ |
2ba9daa7 | 192 | LCT_NORMAL, VOIDmode, 2, TRAMP, Pmode, \ |
31fa03e5 | 193 | plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode); |
f12d26af | 194 | |
31fa03e5 RK |
195 | /* Clear the instruction cache from `beg' to `end'. This makes an |
196 | inline system call to SYS_cacheflush. The arguments are as | |
197 | follows: | |
198 | ||
199 | cacheflush (addr, scope, cache, len) | |
200 | ||
201 | addr - the start address for the flush | |
202 | scope - the scope of the flush (see the cpush insn) | |
203 | cache - which cache to flush (see the cpush insn) | |
204 | len - a factor relating to the number of flushes to perform: | |
3b4b85c9 | 205 | len/16 lines, or len/4096 pages. */ |
31fa03e5 RK |
206 | |
207 | #define CLEAR_INSN_CACHE(BEG, END) \ | |
208 | { \ | |
209 | register unsigned long _beg __asm ("%d1") = (unsigned long) (BEG); \ | |
210 | unsigned long _end = (unsigned long) (END); \ | |
211 | register unsigned long _len __asm ("%d4") = (_end - _beg + 32); \ | |
212 | __asm __volatile \ | |
3b4b85c9 BI |
213 | ("move%.l #123, %/d0\n\t" /* system call nr */ \ |
214 | "move%.l #1, %/d2\n\t" /* clear lines */ \ | |
215 | "move%.l #3, %/d3\n\t" /* insn+data caches */ \ | |
216 | "trap #0" \ | |
31fa03e5 RK |
217 | : /* no outputs */ \ |
218 | : "d" (_beg), "d" (_len) \ | |
219 | : "%d0", "%d2", "%d3"); \ | |
f12d26af | 220 | } |
3edc56a9 | 221 | |
a5fe455b | 222 | #define TARGET_ASM_FILE_END file_end_indicate_exec_stack |
19a95697 | 223 | |
cd077e79 JM |
224 | #undef DBX_REGISTER_NUMBER |
225 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
226 | ||
227 | #undef SIZE_TYPE | |
228 | #define SIZE_TYPE "unsigned int" | |
229 | ||
230 | #undef PTRDIFF_TYPE | |
231 | #define PTRDIFF_TYPE "int" | |
232 | ||
233 | #undef WCHAR_TYPE | |
234 | #define WCHAR_TYPE "long int" | |
235 | ||
236 | #undef WCHAR_TYPE_SIZE | |
237 | #define WCHAR_TYPE_SIZE BITS_PER_WORD |