1 /* Definitions for SOM assembler support.
2 Copyright (C) 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* So we can conditionalize small amounts of code in pa.c or pa.md. */
24 /* We do not use BINCL stabs in SOM.
25 ??? If it does not hurt, we probably should to avoid useless divergence
26 from other embedded stabs implementations. */
29 /* We make the first line stab special to avoid adding several
30 gross hacks to GAS. */
31 #undef ASM_OUTPUT_SOURCE_LINE
32 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
33 { static int sym_lineno = 1; \
34 static tree last_function_decl = NULL; \
35 if (current_function_decl == last_function_decl) \
36 fprintf (file, "\t.stabn 68,0,%d,L$M%d-%s\nL$M%d:\n", \
38 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0) + 1, \
41 fprintf (file, "\t.stabn 68,0,%d,0\n", line); \
42 last_function_decl = current_function_decl; \
45 /* gdb needs a null N_SO at the end of each file for scattered loading. */
47 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
48 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
50 fputs ("\t.SPACE $TEXT$\n\t.NSUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n", FILE); \
52 "\t.stabs \"\",%d,0,0,L$text_end0000\nL$text_end0000:\n", N_SO)
54 /* HPUX has a program 'chatr' to list the dependencies of dynamically
55 linked executables and shared libraries. */
56 #define LDD_SUFFIX "chatr"
57 /* Look for lines like "dynamic /usr/lib/X11R5/libX11.sl"
58 or "static /usr/lib/X11R5/libX11.sl".
60 HPUX 10.20 also has lines like "static branch prediction ..."
61 so we filter that out explicitly.
63 We also try to bound our search for libraries with marker
64 lines. What a pain. */
65 #define PARSE_LDD_OUTPUT(PTR) \
67 static int in_shlib_list = 0; \
68 while (*PTR == ' ') PTR++; \
69 if (strncmp (PTR, "shared library list:", \
70 sizeof ("shared library list:") - 1) == 0) \
75 else if (strncmp (PTR, "shared library binding:", \
76 sizeof ("shared library binding:") - 1) == 0)\
81 else if (strncmp (PTR, "static branch prediction disabled", \
82 sizeof ("static branch prediction disabled") - 1) == 0)\
87 else if (in_shlib_list \
88 && strncmp (PTR, "dynamic", sizeof ("dynamic") - 1) == 0) \
90 PTR += sizeof ("dynamic") - 1; \
91 while (*p == ' ') PTR++; \
93 else if (in_shlib_list \
94 && strncmp (PTR, "static", sizeof ("static") - 1) == 0) \
96 PTR += sizeof ("static") - 1; \
97 while (*p == ' ') PTR++; \
103 /* Output the label for a function definition. */
104 #ifndef HP_FP_ARG_DESCRIPTOR_REVERSED
105 #define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \
106 do { fprintf (FILE, ",ARGW%d=FR", (ARG0)); \
107 fprintf (FILE, ",ARGW%d=FU", (ARG1));} while (0)
108 #define DFMODE_RETURN_STRING ",RTNVAL=FU"
109 #define SFMODE_RETURN_STRING ",RTNVAL=FR"
111 #define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \
112 do { fprintf (FILE, ",ARGW%d=FU", (ARG0)); \
113 fprintf (FILE, ",ARGW%d=FR", (ARG1));} while (0)
114 #define DFMODE_RETURN_STRING ",RTNVAL=FR"
115 #define SFMODE_RETURN_STRING ",RTNVAL=FU"
119 /* NAME refers to the function's name. If we are placing each function into
120 its own section, we need to switch to the section for this function. Note
121 that the section name will have a "." prefix. */
122 #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, NAME) \
125 STRIP_NAME_ENCODING (name, NAME); \
126 if (TARGET_GAS && in_section == in_text) \
127 fputs ("\t.NSUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n", FILE); \
128 else if (TARGET_GAS) \
130 "\t.SUBSPA .%s\n", name); \
133 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
134 do { tree fntype = TREE_TYPE (TREE_TYPE (DECL)); \
135 tree tree_type = TREE_TYPE (DECL); \
138 if (TREE_PUBLIC (DECL) || TARGET_GAS) \
140 if (TREE_PUBLIC (DECL)) \
142 fputs ("\t.EXPORT ", FILE); \
143 assemble_name (FILE, NAME); \
144 fputs (",ENTRY,PRIV_LEV=3", FILE); \
148 fputs ("\t.PARAM ", FILE); \
149 assemble_name (FILE, NAME); \
151 for (parm = DECL_ARGUMENTS (DECL), i = 0; parm && i < 4; \
152 parm = TREE_CHAIN (parm)) \
154 if (TYPE_MODE (DECL_ARG_TYPE (parm)) == SFmode \
155 && ! TARGET_SOFT_FLOAT) \
156 fprintf (FILE, ",ARGW%d=FR", i++); \
157 else if (TYPE_MODE (DECL_ARG_TYPE (parm)) == DFmode \
158 && ! TARGET_SOFT_FLOAT) \
163 ASM_DOUBLE_ARG_DESCRIPTORS (FILE, i++, i++); \
171 FUNCTION_ARG_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)),\
172 DECL_ARG_TYPE (parm)); \
173 /* Passing structs by invisible reference uses \
174 one general register. */ \
176 || TREE_ADDRESSABLE (DECL_ARG_TYPE (parm))) \
178 if (arg_size == 2 && i <= 2) \
181 fprintf (FILE, ",ARGW%d=GR", i++); \
182 fprintf (FILE, ",ARGW%d=GR", i++); \
184 else if (arg_size == 1) \
185 fprintf (FILE, ",ARGW%d=GR", i++); \
190 /* anonymous args */ \
191 if ((TYPE_ARG_TYPES (tree_type) != 0 \
192 && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
193 != void_type_node)) \
194 || current_function_varargs) \
197 fprintf (FILE, ",ARGW%d=GR", i); \
199 if (TYPE_MODE (fntype) == DFmode && ! TARGET_SOFT_FLOAT) \
200 fputs (DFMODE_RETURN_STRING, FILE); \
201 else if (TYPE_MODE (fntype) == SFmode && ! TARGET_SOFT_FLOAT) \
202 fputs (SFMODE_RETURN_STRING, FILE); \
203 else if (fntype != void_type_node) \
204 fputs (",RTNVAL=GR", FILE); \
205 fputs ("\n", FILE); \
208 /* Output at beginning of assembler file. */
210 #define ASM_FILE_START(FILE) \
213 fputs("\t.LEVEL 2.0\n", FILE); \
214 else if (TARGET_PA_11) \
215 fputs("\t.LEVEL 1.1\n", FILE); \
217 fputs("\t.LEVEL 1.0\n", FILE); \
218 fputs ("\t.SPACE $PRIVATE$\n\
219 \t.SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31\n\
220 \t.SUBSPA $BSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=82\n\
222 \t.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44\n\
223 \t.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n\
224 \t.IMPORT $global$,DATA\n\
225 \t.IMPORT $$dyncall,MILLICODE\n", FILE);\
227 fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
228 if (write_symbols != NO_DEBUG) \
229 output_file_directive ((FILE), main_input_filename); \
232 /* Output before code. */
234 /* Supposedly the assembler rejects the command if there is no tab! */
235 #define TEXT_SECTION_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $CODE$\n"
237 /* Output before read-only data. */
239 /* Supposedly the assembler rejects the command if there is no tab! */
240 #define READONLY_DATA_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $LIT$\n"
242 #define READONLY_DATA_SECTION readonly_data
244 /* Output before writable data. */
246 /* Supposedly the assembler rejects the command if there is no tab! */
247 #define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
249 /* Output before uninitialized data. */
251 #define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n"
253 /* Define the .bss section for ASM_OUTPUT_LOCAL to use. */
255 #ifndef CTORS_SECTION_FUNCTION
256 #define EXTRA_SECTIONS in_readonly_data
257 #define CTORS_SECTION_FUNCTION
258 #define DTORS_SECTION_FUNCTION
260 #define EXTRA_SECTIONS in_readonly_data, in_ctors, in_dtors
263 /* Switch into a generic section.
264 This is currently only used to support section attributes.
266 We make the section read-only and executable for a function decl,
267 read-only for a const data decl, and writable for a non-const data decl. */
268 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
269 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
271 fputs ("\t.SPACE $TEXT$\n", FILE); \
273 "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY,SORT=24\n",\
274 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
276 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
278 fputs ("\t.SPACE $TEXT$\n", FILE); \
280 "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,SORT=16\n", \
281 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
285 fputs ("\t.SPACE $PRIVATE$\n", FILE); \
287 "\t.SUBSPA %s%s%s,QUAD=1,ALIGN=8,ACCESS=31,SORT=16\n", \
288 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
291 /* FIXME: HPUX ld generates incorrect GOT entries for "T" fixups
292 which reference data within the $TEXT$ space (for example constant
293 strings in the $LIT$ subspace).
295 The assemblers (GAS and HP as) both have problems with handling
296 the difference of two symbols which is the other correct way to
297 reference constant data during PIC code generation.
299 So, there's no way to reference constant data which is in the
300 $TEXT$ space during PIC generation. Instead place all constant
301 data into the $PRIVATE$ subspace (this reduces sharing, but it
304 #define EXTRA_SECTION_FUNCTIONS \
308 if (in_section != in_readonly_data) \
311 fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); \
313 fprintf (asm_out_file, "%s\n", READONLY_DATA_ASM_OP); \
314 in_section = in_readonly_data; \
317 CTORS_SECTION_FUNCTION \
318 DTORS_SECTION_FUNCTION
320 /* This is how to output a command to make the user-level label named NAME
321 defined for reference from other files.
323 We call assemble_name, which in turn sets TREE_SYMBOL_REFERENCED. This
324 macro will restore the original value of TREE_SYMBOL_REFERENCED to avoid
325 placing useless function definitions in the output file.
327 Also note that the SOM based tools need the symbol imported as a CODE
328 symbol, while the ELF based tools require the symbol to be imported as
329 an ENTRY symbol. What a crock. */
331 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
332 do { int save_referenced; \
333 save_referenced = TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)); \
334 fputs ("\t.IMPORT ", FILE); \
335 assemble_name (FILE, NAME); \
336 if (FUNCTION_NAME_P (NAME)) \
337 fputs (",CODE\n", FILE); \
339 fputs (",DATA\n", FILE); \
340 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)) = save_referenced; \
343 /* The bogus HP assembler requires ALL external references to be
344 "imported", even library calls. They look a bit different, so
347 Also note not all libcall names are passed to ENCODE_SECTION_INFO
348 (__main for example). To make sure all libcall names have section
349 info recorded in them, we do it here. */
351 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
352 do { fputs ("\t.IMPORT ", FILE); \
353 if (!function_label_operand (RTL, VOIDmode)) \
354 hppa_encode_label (RTL, 1); \
355 assemble_name (FILE, XSTR ((RTL), 0)); \
356 fputs (",CODE\n", FILE); \
359 #define ASM_FILE_END(FILE) output_deferred_plabels (FILE)
361 /* We want __gcc_plt_call to appear in every program built by
362 gcc, so we make a reference to it out of __main.
363 We use the asm statement to fool the optimizer into not
364 removing the dead (but important) initialization of
367 #define DO_GLOBAL_DTORS_BODY \
369 extern void __gcc_plt_call (); \
370 void (*reference)() = &__gcc_plt_call; \
372 __asm__ ("" : : "r" (reference)); \
373 for (p = __DTOR_LIST__ + 1; *p; ) \
377 /* The .align directive in the HP assembler allows up to a 32 alignment. */
378 #define MAX_OFILE_ALIGNMENT 32768