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 2, 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); \
150 fputs (",PRIV_LEV=3", FILE); \
152 for (parm = DECL_ARGUMENTS (DECL), i = 0; parm && i < 4; \
153 parm = TREE_CHAIN (parm)) \
155 if (TYPE_MODE (DECL_ARG_TYPE (parm)) == SFmode \
156 && ! TARGET_SOFT_FLOAT) \
157 fprintf (FILE, ",ARGW%d=FR", i++); \
158 else if (TYPE_MODE (DECL_ARG_TYPE (parm)) == DFmode \
159 && ! TARGET_SOFT_FLOAT) \
164 ASM_DOUBLE_ARG_DESCRIPTORS (FILE, i++, i++); \
172 FUNCTION_ARG_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)),\
173 DECL_ARG_TYPE (parm)); \
174 /* Passing structs by invisible reference uses \
175 one general register. */ \
177 || TREE_ADDRESSABLE (DECL_ARG_TYPE (parm))) \
179 if (arg_size == 2 && i <= 2) \
182 fprintf (FILE, ",ARGW%d=GR", i++); \
183 fprintf (FILE, ",ARGW%d=GR", i++); \
185 else if (arg_size == 1) \
186 fprintf (FILE, ",ARGW%d=GR", i++); \
191 /* anonymous args */ \
192 if ((TYPE_ARG_TYPES (tree_type) != 0 \
193 && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
194 != void_type_node)) \
195 || current_function_varargs) \
198 fprintf (FILE, ",ARGW%d=GR", i); \
200 if (TYPE_MODE (fntype) == DFmode && ! TARGET_SOFT_FLOAT) \
201 fputs (DFMODE_RETURN_STRING, FILE); \
202 else if (TYPE_MODE (fntype) == SFmode && ! TARGET_SOFT_FLOAT) \
203 fputs (SFMODE_RETURN_STRING, FILE); \
204 else if (fntype != void_type_node) \
205 fputs (",RTNVAL=GR", FILE); \
206 fputs ("\n", FILE); \
209 /* Output at beginning of assembler file. */
211 #define ASM_FILE_START(FILE) \
214 fputs("\t.LEVEL 2.0\n", FILE); \
215 else if (TARGET_PA_11) \
216 fputs("\t.LEVEL 1.1\n", FILE); \
218 fputs("\t.LEVEL 1.0\n", FILE); \
219 fputs ("\t.SPACE $PRIVATE$\n\
220 \t.SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31\n\
221 \t.SUBSPA $BSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=82\n\
223 \t.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44\n\
224 \t.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n\
225 \t.IMPORT $global$,DATA\n\
226 \t.IMPORT $$dyncall,MILLICODE\n", FILE);\
228 fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
229 if (write_symbols != NO_DEBUG) \
230 output_file_directive ((FILE), main_input_filename); \
233 /* Output before code. */
235 /* Supposedly the assembler rejects the command if there is no tab! */
236 #define TEXT_SECTION_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $CODE$\n"
238 /* Output before read-only data. */
240 /* Supposedly the assembler rejects the command if there is no tab! */
241 #define READONLY_DATA_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $LIT$\n"
243 #define READONLY_DATA_SECTION readonly_data
245 /* Output before writable data. */
247 /* Supposedly the assembler rejects the command if there is no tab! */
248 #define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
250 /* Output before uninitialized data. */
252 #define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n"
254 /* Define the .bss section for ASM_OUTPUT_LOCAL to use. */
256 #ifndef CTORS_SECTION_FUNCTION
257 #define EXTRA_SECTIONS in_readonly_data
258 #define CTORS_SECTION_FUNCTION
259 #define DTORS_SECTION_FUNCTION
261 #define EXTRA_SECTIONS in_readonly_data, in_ctors, in_dtors
264 /* Switch into a generic section.
265 This is currently only used to support section attributes.
267 We make the section read-only and executable for a function decl,
268 read-only for a const data decl, and writable for a non-const data decl. */
269 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
270 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
272 fputs ("\t.SPACE $TEXT$\n", FILE); \
274 "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY,SORT=24\n",\
275 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
277 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
279 fputs ("\t.SPACE $TEXT$\n", FILE); \
281 "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,SORT=16\n", \
282 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
286 fputs ("\t.SPACE $PRIVATE$\n", FILE); \
288 "\t.SUBSPA %s%s%s,QUAD=1,ALIGN=8,ACCESS=31,SORT=16\n", \
289 TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
292 /* FIXME: HPUX ld generates incorrect GOT entries for "T" fixups
293 which reference data within the $TEXT$ space (for example constant
294 strings in the $LIT$ subspace).
296 The assemblers (GAS and HP as) both have problems with handling
297 the difference of two symbols which is the other correct way to
298 reference constant data during PIC code generation.
300 So, there's no way to reference constant data which is in the
301 $TEXT$ space during PIC generation. Instead place all constant
302 data into the $PRIVATE$ subspace (this reduces sharing, but it
305 #define EXTRA_SECTION_FUNCTIONS \
309 if (in_section != in_readonly_data) \
312 fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); \
314 fprintf (asm_out_file, "%s\n", READONLY_DATA_ASM_OP); \
315 in_section = in_readonly_data; \
318 CTORS_SECTION_FUNCTION \
319 DTORS_SECTION_FUNCTION
321 /* This is how to output a command to make the user-level label named NAME
322 defined for reference from other files.
324 We call assemble_name, which in turn sets TREE_SYMBOL_REFERENCED. This
325 macro will restore the original value of TREE_SYMBOL_REFERENCED to avoid
326 placing useless function definitions in the output file.
328 Also note that the SOM based tools need the symbol imported as a CODE
329 symbol, while the ELF based tools require the symbol to be imported as
330 an ENTRY symbol. What a crock. */
332 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
333 do { int save_referenced; \
334 save_referenced = TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)); \
335 fputs ("\t.IMPORT ", FILE); \
336 assemble_name (FILE, NAME); \
337 if (FUNCTION_NAME_P (NAME)) \
338 fputs (",CODE\n", FILE); \
340 fputs (",DATA\n", FILE); \
341 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)) = save_referenced; \
344 /* The bogus HP assembler requires ALL external references to be
345 "imported", even library calls. They look a bit different, so
348 Also note not all libcall names are passed to ENCODE_SECTION_INFO
349 (__main for example). To make sure all libcall names have section
350 info recorded in them, we do it here. */
352 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
353 do { fputs ("\t.IMPORT ", FILE); \
354 if (!function_label_operand (RTL, VOIDmode)) \
355 hppa_encode_label (RTL, 1); \
356 assemble_name (FILE, XSTR ((RTL), 0)); \
357 fputs (",CODE\n", FILE); \
360 #define ASM_FILE_END(FILE) output_deferred_plabels (FILE)
362 /* We want __gcc_plt_call to appear in every program built by
363 gcc, so we make a reference to it out of __main.
364 We use the asm statement to fool the optimizer into not
365 removing the dead (but important) initialization of
368 #define DO_GLOBAL_DTORS_BODY \
370 extern void __gcc_plt_call (); \
371 void (*reference)() = &__gcc_plt_call; \
373 __asm__ ("" : : "r" (reference)); \
374 for (p = __DTOR_LIST__ + 1; *p; ) \
378 /* The .align directive in the HP assembler allows up to a 32 alignment. */
379 #define MAX_OFILE_ALIGNMENT 32768
382 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
384 /* This is how we tell the assembler that a symbol is weak. */
386 #define ASM_WEAKEN_LABEL(FILE,NAME) \
387 do { fputs ("\t.weak\t", FILE); \
388 assemble_name (FILE, NAME); \
389 fputc ('\n', FILE); \
390 if (! FUNCTION_NAME_P (NAME)) \
392 fputs ("\t.EXPORT ", FILE); \
393 assemble_name (FILE, NAME); \
394 fputs (",DATA\n", FILE); \