1 /* Definitions of target machine for GNU compiler, for ARM with PE obj format.
2 Copyright (C) 1995, 1996, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Doug Evans (dje@cygnus.com).
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #undef USER_LABEL_PREFIX
25 #define USER_LABEL_PREFIX "_"
28 /* Run-time Target Specification. */
30 #define TARGET_VERSION fputs (" (ARM/pe)", stderr)
32 /* Support the __declspec keyword by turning them into attributes.
33 We currently only support: naked, dllimport, and dllexport.
34 Note that the current way we do this may result in a collision with
35 predefined attributes later on. This can be solved by using one attribute,
36 say __declspec__, and passing args to it. The problem with that approach
37 is that args are not accumulated: each new appearance would clobber any
40 #define CPP_PREDEFINES "\
41 -Darm -D__pe__ -Acpu(arm) -Amachine(arm) \
42 -D__declspec(x)=__attribute__((x)) \
45 /* Experimental addition for pr 7885.
46 Ignore dllimport for functions. */
47 #define TARGET_FLAG_NOP_FUN (1 << 24)
49 #undef TARGET_NOP_FUN_DLLIMPORT
50 #define TARGET_NOP_FUN_DLLIMPORT (target_flags & TARGET_FLAG_NOP_FUN)
52 #undef SUBTARGET_SWITCHES
53 #define SUBTARGET_SWITCHES \
54 { "nop-fun-dllimport", TARGET_FLAG_NOP_FUN, "Ignore dllimport attribute for functions" }, \
55 { "no-nop-fun-dllimport", - TARGET_FLAG_NOP_FUN, "" },
58 #define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | TARGET_FLAG_NOP_FUN)
62 #define WCHAR_TYPE "short unsigned int"
63 #undef WCHAR_TYPE_SIZE
64 #define WCHAR_TYPE_SIZE 16
66 /* Same as arm.h except r10 is call-saved, not fixed. */
67 #undef FIXED_REGISTERS
68 #define FIXED_REGISTERS \
76 /* Same as arm.h except r10 is call-saved, not fixed. */
77 #undef CALL_USED_REGISTERS
78 #define CALL_USED_REGISTERS \
86 /* This is to better conform to the ARM PCS.
87 Richard Earnshaw hasn't put this into FSF sources yet so it's here. */
88 #undef RETURN_IN_MEMORY
89 #define RETURN_IN_MEMORY(TYPE) \
90 ((TYPE_MODE ((TYPE)) == BLKmode && ! TYPE_NO_FORCE_BLK (TYPE)) \
91 || (AGGREGATE_TYPE_P ((TYPE)) && arm_pe_return_in_memory ((TYPE))))
93 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
94 is a valid machine specific attribute for DECL.
95 The attributes in ATTRIBUTES have previously been assigned to DECL. */
96 #undef VALID_MACHINE_DECL_ATTRIBUTE
97 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
98 arm_pe_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
100 #define MERGE_MACHINE_DECL_ATTRIBUTES(OLD, NEW) \
101 arm_pe_merge_machine_decl_attributes ((OLD), (NEW))
103 /* In addition to the stuff done in arm.h, we must mark dll symbols specially.
104 Definitions of dllexport'd objects install some info in the .drectve
105 section. References to dllimport'd objects are fetched indirectly via
106 __imp_. If both are declared, dllexport overrides.
107 This is also needed to implement one-only vtables: they go into their own
108 section and we need to set DECL_SECTION_NAME so we do that here.
109 Note that we can be called twice on the same decl. */
110 #undef ENCODE_SECTION_INFO
111 #define ENCODE_SECTION_INFO(DECL) \
112 arm_pe_encode_section_info (DECL)
114 /* Used to implement dllexport overriding dllimport semantics. It's also used
115 to handle vtables - the first pass won't do anything because
116 DECL_CONTEXT (DECL) will be 0 so arm_dll{ex,im}port_p will return 0.
117 It's also used to handle dllimport override semantics. */
119 #define REDO_SECTION_INFO_P(DECL) \
120 ((DECL_MACHINE_ATTRIBUTES (DECL) != NULL_TREE) \
121 || (TREE_CODE (DECL) == VAR_DECL && DECL_VIRTUAL_P (DECL)))
123 #define REDO_SECTION_INFO_P(DECL) 1
126 /* Utility used only in this file. */
127 #define ARM_STRIP_NAME_ENCODING(SYM_NAME) \
128 ((SYM_NAME) + ((SYM_NAME)[0] == '@' ? 3 : 0))
130 /* Strip any text from SYM_NAME added by ENCODE_SECTION_INFO and store
131 the result in VAR. */
132 #undef STRIP_NAME_ENCODING
133 #define STRIP_NAME_ENCODING(VAR, SYM_NAME) \
134 (VAR) = ARM_STRIP_NAME_ENCODING (SYM_NAME)
136 /* Define this macro if in some cases global symbols from one translation
137 unit may not be bound to undefined symbols in another translation unit
138 without user intervention. For instance, under Microsoft Windows
139 symbols must be explicitly imported from shared libraries (DLLs). */
140 #define MULTIPLE_SYMBOL_SPACES
142 #define UNIQUE_SECTION_P(DECL) DECL_ONE_ONLY (DECL)
144 #define UNIQUE_SECTION(DECL, RELOC) arm_pe_unique_section (DECL, RELOC)
146 #define SUPPORTS_ONE_ONLY 1
148 /* A C statement to output something to the assembler file to switch to section
149 NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
150 NULL_TREE. Some target formats do not support arbitrary sections. Do not
151 define this macro in such cases. */
152 #undef ASM_OUTPUT_SECTION_NAME
153 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
156 if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
157 fprintf (STREAM, "\t.section %s,\"x\"\n", (NAME)); \
158 else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
159 fprintf (STREAM, "\t.section %s,\"\"\n", (NAME)); \
161 fprintf (STREAM, "\t.section %s,\"w\"\n", (NAME)); \
162 /* Functions may have been compiled at various levels of \
163 optimization so we can't use `same_size' here. \
164 Instead, have the linker pick one. */ \
165 if ((DECL) && DECL_ONE_ONLY (DECL)) \
166 fprintf (STREAM, "\t.linkonce %s\n", \
167 TREE_CODE (DECL) == FUNCTION_DECL \
168 ? "discard" : "same_size"); \
172 /* This outputs a lot of .req's to define alias for various registers.
173 Let's try to avoid this. */
174 #undef ASM_FILE_START
175 #define ASM_FILE_START(STREAM) \
178 extern char * version_string; \
179 asm_fprintf (STREAM, "%@ Generated by gcc %s for ARM/pe\n",\
181 output_file_directive ((STREAM), main_input_filename); \
185 /* Output a reference to a label. */
186 #undef ASM_OUTPUT_LABELREF
187 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
188 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, ARM_STRIP_NAME_ENCODING (NAME))
190 /* Output a function definition label. */
191 #undef ASM_DECLARE_FUNCTION_NAME
192 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
195 if (arm_dllexport_name_p (NAME)) \
197 drectve_section (); \
198 fprintf (STREAM, "\t.ascii \" -export:%s\"\n",\
199 ARM_STRIP_NAME_ENCODING (NAME)); \
200 function_section (DECL); \
202 if (TARGET_POKE_FUNCTION_NAME) \
203 arm_poke_function_name ((STREAM), (NAME)); \
204 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
208 /* Output a common block. */
209 #undef ASM_OUTPUT_COMMON
210 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
213 if (arm_dllexport_name_p (NAME)) \
215 drectve_section (); \
216 fprintf ((STREAM), "\t.ascii \" -export:%s\"\n",\
217 ARM_STRIP_NAME_ENCODING (NAME)); \
219 if (! arm_dllimport_name_p (NAME)) \
221 fprintf ((STREAM), "\t.comm\t"); \
222 assemble_name ((STREAM), (NAME)); \
223 asm_fprintf ((STREAM), ", %d\t%@ %d\n", \
224 (ROUNDED), (SIZE)); \
229 /* Output the label for an initialized variable. */
230 #undef ASM_DECLARE_OBJECT_NAME
231 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
234 if (arm_dllexport_name_p (NAME)) \
236 enum in_section save_section = in_section; \
237 drectve_section (); \
238 fprintf (STREAM, "\t.ascii \" -export:%s\"\n",\
239 ARM_STRIP_NAME_ENCODING (NAME)); \
240 switch_to_section (save_section, (DECL)); \
242 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
246 /* Support the ctors/dtors and other sections. */
248 #define DRECTVE_SECTION_ASM_OP "\t.section .drectve"
250 /* A list of other sections which the compiler might be "in" at any
253 #undef SUBTARGET_EXTRA_SECTIONS
254 #define SUBTARGET_EXTRA_SECTIONS in_drectve,
256 /* A list of extra section function definitions. */
258 #undef SUBTARGET_EXTRA_SECTION_FUNCTIONS
259 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS \
260 DRECTVE_SECTION_FUNCTION \
261 SWITCH_TO_SECTION_FUNCTION
263 #define DRECTVE_SECTION_FUNCTION \
267 if (in_section != in_drectve) \
269 fprintf (asm_out_file, "%s\n", DRECTVE_SECTION_ASM_OP); \
270 in_section = in_drectve; \
274 /* Switch to SECTION (an `enum in_section').
276 ??? This facility should be provided by GCC proper.
277 The problem is that we want to temporarily switch sections in
278 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
280 #define SWITCH_TO_SECTION_FUNCTION \
282 switch_to_section (section, decl) \
283 enum in_section section; \
288 case in_text: text_section (); break; \
289 case in_data: data_section (); break; \
290 case in_named: named_section (decl, NULL, 0); break; \
291 case in_rdata: rdata_section (); break; \
292 case in_ctors: ctors_section (); break; \
293 case in_dtors: dtors_section (); break; \
294 case in_drectve: drectve_section (); break; \
295 default: abort (); break; \