Commit | Line | Data |
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252b5132 | 1 | /* tc-i960.c - All the i80960-specific stuff |
f7e42eb4 | 2 | Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
ec2655a6 | 3 | 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This file is part of GAS. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
11 | any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
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 | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 | 22 | |
92774660 | 23 | /* See comment on md_parse_option for 80960-specific invocation options. */ |
252b5132 RH |
24 | |
25 | /* There are 4 different lengths of (potentially) symbol-based displacements | |
26 | in the 80960 instruction set, each of which could require address fix-ups | |
27 | and (in the case of external symbols) emission of relocation directives: | |
28 | ||
29 | 32-bit (MEMB) | |
30 | This is a standard length for the base assembler and requires no | |
31 | special action. | |
32 | ||
33 | 13-bit (COBR) | |
34 | This is a non-standard length, but the base assembler has a | |
35 | hook for bit field address fixups: the fixS structure can | |
36 | point to a descriptor of the field, in which case our | |
37 | md_number_to_field() routine gets called to process it. | |
38 | ||
39 | I made the hook a little cleaner by having fix_new() (in the base | |
40 | assembler) return a pointer to the fixS in question. And I made it a | |
41 | little simpler by storing the field size (in this case 13) instead of | |
42 | of a pointer to another structure: 80960 displacements are ALWAYS | |
43 | stored in the low-order bits of a 4-byte word. | |
44 | ||
45 | Since the target of a COBR cannot be external, no relocation | |
46 | directives for this size displacement have to be generated. | |
47 | But the base assembler had to be modified to issue error | |
48 | messages if the symbol did turn out to be external. | |
49 | ||
50 | 24-bit (CTRL) | |
51 | Fixups are handled as for the 13-bit case (except that 24 is stored | |
52 | in the fixS). | |
53 | ||
54 | The relocation directive generated is the same as that for the 32-bit | |
55 | displacement, except that it's PC-relative (the 32-bit displacement | |
56 | never is). The i80960 version of the linker needs a mod to | |
57 | distinguish and handle the 24-bit case. | |
58 | ||
59 | 12-bit (MEMA) | |
60 | MEMA formats are always promoted to MEMB (32-bit) if the displacement | |
61 | is based on a symbol, because it could be relocated at link time. | |
62 | The only time we use the 12-bit format is if an absolute value of | |
63 | less than 4096 is specified, in which case we need neither a fixup nor | |
64 | a relocation directive. */ | |
65 | ||
252b5132 RH |
66 | #include "as.h" |
67 | ||
3882b010 | 68 | #include "safe-ctype.h" |
252b5132 RH |
69 | #include "obstack.h" |
70 | ||
71 | #include "opcode/i960.h" | |
72 | ||
73 | #if defined (OBJ_AOUT) || defined (OBJ_BOUT) | |
74 | ||
ea1562b3 NC |
75 | #define TC_S_IS_SYSPROC(s) ((1 <= S_GET_OTHER (s)) && (S_GET_OTHER (s) <= 32)) |
76 | #define TC_S_IS_BALNAME(s) (S_GET_OTHER (s) == N_BALNAME) | |
77 | #define TC_S_IS_CALLNAME(s) (S_GET_OTHER (s) == N_CALLNAME) | |
78 | #define TC_S_IS_BADPROC(s) ((S_GET_OTHER (s) != 0) && !TC_S_IS_CALLNAME (s) && !TC_S_IS_BALNAME (s) && !TC_S_IS_SYSPROC (s)) | |
252b5132 | 79 | |
ea1562b3 NC |
80 | #define TC_S_SET_SYSPROC(s, p) (S_SET_OTHER ((s), (p) + 1)) |
81 | #define TC_S_GET_SYSPROC(s) (S_GET_OTHER (s) - 1) | |
252b5132 | 82 | |
ea1562b3 NC |
83 | #define TC_S_FORCE_TO_BALNAME(s) (S_SET_OTHER ((s), N_BALNAME)) |
84 | #define TC_S_FORCE_TO_CALLNAME(s) (S_SET_OTHER ((s), N_CALLNAME)) | |
252b5132 RH |
85 | #define TC_S_FORCE_TO_SYSPROC(s) {;} |
86 | ||
87 | #else /* ! OBJ_A/BOUT */ | |
88 | #ifdef OBJ_COFF | |
89 | ||
ea1562b3 NC |
90 | #define TC_S_IS_SYSPROC(s) (S_GET_STORAGE_CLASS (s) == C_SCALL) |
91 | #define TC_S_IS_BALNAME(s) (SF_GET_BALNAME (s)) | |
92 | #define TC_S_IS_CALLNAME(s) (SF_GET_CALLNAME (s)) | |
93 | #define TC_S_IS_BADPROC(s) (TC_S_IS_SYSPROC (s) && TC_S_GET_SYSPROC (s) < 0 && 31 < TC_S_GET_SYSPROC (s)) | |
252b5132 RH |
94 | |
95 | #define TC_S_SET_SYSPROC(s, p) ((s)->sy_symbol.ost_auxent[1].x_sc.x_stindx = (p)) | |
96 | #define TC_S_GET_SYSPROC(s) ((s)->sy_symbol.ost_auxent[1].x_sc.x_stindx) | |
97 | ||
ea1562b3 NC |
98 | #define TC_S_FORCE_TO_BALNAME(s) (SF_SET_BALNAME (s)) |
99 | #define TC_S_FORCE_TO_CALLNAME(s) (SF_SET_CALLNAME (s)) | |
100 | #define TC_S_FORCE_TO_SYSPROC(s) (S_SET_STORAGE_CLASS ((s), C_SCALL)) | |
252b5132 RH |
101 | |
102 | #else /* ! OBJ_COFF */ | |
bedf545c ILT |
103 | #ifdef OBJ_ELF |
104 | #define TC_S_IS_SYSPROC(s) 0 | |
105 | ||
106 | #define TC_S_IS_BALNAME(s) 0 | |
107 | #define TC_S_IS_CALLNAME(s) 0 | |
108 | #define TC_S_IS_BADPROC(s) 0 | |
109 | ||
110 | #define TC_S_SET_SYSPROC(s, p) | |
ea1562b3 | 111 | #define TC_S_GET_SYSPROC(s) 0 |
bedf545c ILT |
112 | |
113 | #define TC_S_FORCE_TO_BALNAME(s) | |
114 | #define TC_S_FORCE_TO_CALLNAME(s) | |
115 | #define TC_S_FORCE_TO_SYSPROC(s) | |
116 | #else | |
117 | #error COFF, a.out, b.out, and ELF are the only supported formats. | |
118 | #endif /* ! OBJ_ELF */ | |
252b5132 RH |
119 | #endif /* ! OBJ_COFF */ |
120 | #endif /* ! OBJ_A/BOUT */ | |
121 | ||
122 | extern char *input_line_pointer; | |
123 | ||
252b5132 | 124 | /* Local i80960 routines. */ |
b9195351 AM |
125 | struct memS; |
126 | struct regop; | |
127 | ||
ea1562b3 NC |
128 | /* See md_parse_option() for meanings of these options. */ |
129 | static char norelax; /* True if -norelax switch seen. */ | |
130 | static char instrument_branches; /* True if -b switch seen. */ | |
252b5132 RH |
131 | |
132 | /* Characters that always start a comment. | |
ea1562b3 | 133 | If the pre-processor is disabled, these aren't very useful. */ |
252b5132 RH |
134 | const char comment_chars[] = "#"; |
135 | ||
136 | /* Characters that only start a comment at the beginning of | |
137 | a line. If the line seems to have the form '# 123 filename' | |
138 | .line and .file directives will appear in the pre-processed output. | |
139 | ||
140 | Note that input_file.c hand checks for '#' at the beginning of the | |
141 | first line of the input file. This is because the compiler outputs | |
ea1562b3 | 142 | #NO_APP at the beginning of its output. */ |
252b5132 | 143 | |
92774660 | 144 | /* Also note that comments started like this one will always work. */ |
252b5132 | 145 | |
ea1562b3 | 146 | const char line_comment_chars[] = "#"; |
63a0b638 | 147 | const char line_separator_chars[] = ";"; |
252b5132 | 148 | |
ea1562b3 | 149 | /* Chars that can be used to separate mant from exp in floating point nums. */ |
252b5132 RH |
150 | const char EXP_CHARS[] = "eE"; |
151 | ||
152 | /* Chars that mean this number is a floating point constant, | |
ea1562b3 | 153 | as in 0f12.456 or 0d1.2345e12. */ |
252b5132 RH |
154 | const char FLT_CHARS[] = "fFdDtT"; |
155 | ||
252b5132 RH |
156 | /* Table used by base assembler to relax addresses based on varying length |
157 | instructions. The fields are: | |
158 | 1) most positive reach of this state, | |
159 | 2) most negative reach of this state, | |
160 | 3) how many bytes this mode will add to the size of the current frag | |
161 | 4) which index into the table to try if we can't fit into this one. | |
162 | ||
163 | For i80960, the only application is the (de-)optimization of cobr | |
164 | instructions into separate compare and branch instructions when a 13-bit | |
ea1562b3 | 165 | displacement won't hack it. */ |
252b5132 RH |
166 | const relax_typeS md_relax_table[] = |
167 | { | |
ea1562b3 NC |
168 | {0, 0, 0, 0}, /* State 0 => no more relaxation possible. */ |
169 | {4088, -4096, 0, 2}, /* State 1: conditional branch (cobr). */ | |
170 | {0x800000 - 8, -0x800000, 4, 0}, /* State 2: compare (reg) & branch (ctrl). */ | |
252b5132 RH |
171 | }; |
172 | ||
252b5132 RH |
173 | /* These are the machine dependent pseudo-ops. |
174 | ||
175 | This table describes all the machine specific pseudo-ops the assembler | |
176 | has to support. The fields are: | |
177 | pseudo-op name without dot | |
178 | function to call to execute this pseudo-op | |
ea1562b3 | 179 | integer arg to pass to the function. */ |
252b5132 RH |
180 | #define S_LEAFPROC 1 |
181 | #define S_SYSPROC 2 | |
182 | ||
ea1562b3 | 183 | /* Macros to extract info from an 'expressionS' structure 'e'. */ |
252b5132 RH |
184 | #define adds(e) e.X_add_symbol |
185 | #define offs(e) e.X_add_number | |
186 | ||
ea1562b3 NC |
187 | /* Branch-prediction bits for CTRL/COBR format opcodes. */ |
188 | #define BP_MASK 0x00000002 /* Mask for branch-prediction bit. */ | |
189 | #define BP_TAKEN 0x00000000 /* Value to OR in to predict branch. */ | |
190 | #define BP_NOT_TAKEN 0x00000002 /* Value to OR in to predict no branch. */ | |
252b5132 | 191 | |
ea1562b3 | 192 | /* Some instruction opcodes that we need explicitly. */ |
252b5132 RH |
193 | #define BE 0x12000000 |
194 | #define BG 0x11000000 | |
195 | #define BGE 0x13000000 | |
196 | #define BL 0x14000000 | |
197 | #define BLE 0x16000000 | |
198 | #define BNE 0x15000000 | |
199 | #define BNO 0x10000000 | |
200 | #define BO 0x17000000 | |
201 | #define CHKBIT 0x5a002700 | |
202 | #define CMPI 0x5a002080 | |
203 | #define CMPO 0x5a002000 | |
204 | ||
205 | #define B 0x08000000 | |
206 | #define BAL 0x0b000000 | |
207 | #define CALL 0x09000000 | |
208 | #define CALLS 0x66003800 | |
209 | #define RET 0x0a000000 | |
210 | ||
92774660 | 211 | /* These masks are used to build up a set of MEMB mode bits. */ |
252b5132 RH |
212 | #define A_BIT 0x0400 |
213 | #define I_BIT 0x0800 | |
214 | #define MEMB_BIT 0x1000 | |
215 | #define D_BIT 0x2000 | |
216 | ||
252b5132 RH |
217 | /* Mask for the only mode bit in a MEMA instruction (if set, abase reg is |
218 | used). */ | |
219 | #define MEMA_ABASE 0x2000 | |
220 | ||
ea1562b3 | 221 | /* Info from which a MEMA or MEMB format instruction can be generated. */ |
b9195351 | 222 | typedef struct memS |
252b5132 | 223 | { |
ea1562b3 | 224 | /* (First) 32 bits of instruction. */ |
252b5132 | 225 | long opcode; |
ea1562b3 | 226 | /* 0-(none), 12- or, 32-bit displacement needed. */ |
252b5132 RH |
227 | int disp; |
228 | /* The expression in the source instruction from which the | |
229 | displacement should be determined. */ | |
230 | char *e; | |
231 | } | |
252b5132 RH |
232 | memS; |
233 | ||
ea1562b3 | 234 | /* The two pieces of info we need to generate a register operand. */ |
252b5132 RH |
235 | struct regop |
236 | { | |
ea1562b3 NC |
237 | int mode; /* 0 =>local/global/spec reg; 1=> literal or fp reg. */ |
238 | int special; /* 0 =>not a sfr; 1=> is a sfr (not valid w/mode=0). */ | |
239 | int n; /* Register number or literal value. */ | |
252b5132 RH |
240 | }; |
241 | ||
252b5132 RH |
242 | /* Number and assembler mnemonic for all registers that can appear in |
243 | operands. */ | |
244 | static const struct | |
245 | { | |
246 | char *reg_name; | |
247 | int reg_num; | |
248 | } | |
249 | regnames[] = | |
250 | { | |
251 | { "pfp", 0 }, | |
252 | { "sp", 1 }, | |
253 | { "rip", 2 }, | |
254 | { "r3", 3 }, | |
255 | { "r4", 4 }, | |
256 | { "r5", 5 }, | |
257 | { "r6", 6 }, | |
258 | { "r7", 7 }, | |
259 | { "r8", 8 }, | |
260 | { "r9", 9 }, | |
261 | { "r10", 10 }, | |
262 | { "r11", 11 }, | |
263 | { "r12", 12 }, | |
264 | { "r13", 13 }, | |
265 | { "r14", 14 }, | |
266 | { "r15", 15 }, | |
267 | { "g0", 16 }, | |
268 | { "g1", 17 }, | |
269 | { "g2", 18 }, | |
270 | { "g3", 19 }, | |
271 | { "g4", 20 }, | |
272 | { "g5", 21 }, | |
273 | { "g6", 22 }, | |
274 | { "g7", 23 }, | |
275 | { "g8", 24 }, | |
276 | { "g9", 25 }, | |
277 | { "g10", 26 }, | |
278 | { "g11", 27 }, | |
279 | { "g12", 28 }, | |
280 | { "g13", 29 }, | |
281 | { "g14", 30 }, | |
282 | { "fp", 31 }, | |
283 | ||
284 | /* Numbers for special-function registers are for assembler internal | |
285 | use only: they are scaled back to range [0-31] for binary output. */ | |
286 | #define SF0 32 | |
287 | ||
288 | { "sf0", 32 }, | |
289 | { "sf1", 33 }, | |
290 | { "sf2", 34 }, | |
291 | { "sf3", 35 }, | |
292 | { "sf4", 36 }, | |
293 | { "sf5", 37 }, | |
294 | { "sf6", 38 }, | |
295 | { "sf7", 39 }, | |
296 | { "sf8", 40 }, | |
297 | { "sf9", 41 }, | |
298 | { "sf10", 42 }, | |
299 | { "sf11", 43 }, | |
300 | { "sf12", 44 }, | |
301 | { "sf13", 45 }, | |
302 | { "sf14", 46 }, | |
303 | { "sf15", 47 }, | |
304 | { "sf16", 48 }, | |
305 | { "sf17", 49 }, | |
306 | { "sf18", 50 }, | |
307 | { "sf19", 51 }, | |
308 | { "sf20", 52 }, | |
309 | { "sf21", 53 }, | |
310 | { "sf22", 54 }, | |
311 | { "sf23", 55 }, | |
312 | { "sf24", 56 }, | |
313 | { "sf25", 57 }, | |
314 | { "sf26", 58 }, | |
315 | { "sf27", 59 }, | |
316 | { "sf28", 60 }, | |
317 | { "sf29", 61 }, | |
318 | { "sf30", 62 }, | |
319 | { "sf31", 63 }, | |
320 | ||
321 | /* Numbers for floating point registers are for assembler internal | |
322 | use only: they are scaled back to [0-3] for binary output. */ | |
323 | #define FP0 64 | |
324 | ||
325 | { "fp0", 64 }, | |
326 | { "fp1", 65 }, | |
327 | { "fp2", 66 }, | |
328 | { "fp3", 67 }, | |
329 | ||
330 | { NULL, 0 }, /* END OF LIST */ | |
331 | }; | |
332 | ||
333 | #define IS_RG_REG(n) ((0 <= (n)) && ((n) < SF0)) | |
334 | #define IS_SF_REG(n) ((SF0 <= (n)) && ((n) < FP0)) | |
335 | #define IS_FP_REG(n) ((n) >= FP0) | |
336 | ||
337 | /* Number and assembler mnemonic for all registers that can appear as | |
338 | 'abase' (indirect addressing) registers. */ | |
339 | static const struct | |
ea1562b3 NC |
340 | { |
341 | char *areg_name; | |
342 | int areg_num; | |
343 | } | |
252b5132 RH |
344 | aregs[] = |
345 | { | |
346 | { "(pfp)", 0 }, | |
347 | { "(sp)", 1 }, | |
348 | { "(rip)", 2 }, | |
349 | { "(r3)", 3 }, | |
350 | { "(r4)", 4 }, | |
351 | { "(r5)", 5 }, | |
352 | { "(r6)", 6 }, | |
353 | { "(r7)", 7 }, | |
354 | { "(r8)", 8 }, | |
355 | { "(r9)", 9 }, | |
356 | { "(r10)", 10 }, | |
357 | { "(r11)", 11 }, | |
358 | { "(r12)", 12 }, | |
359 | { "(r13)", 13 }, | |
360 | { "(r14)", 14 }, | |
361 | { "(r15)", 15 }, | |
362 | { "(g0)", 16 }, | |
363 | { "(g1)", 17 }, | |
364 | { "(g2)", 18 }, | |
365 | { "(g3)", 19 }, | |
366 | { "(g4)", 20 }, | |
367 | { "(g5)", 21 }, | |
368 | { "(g6)", 22 }, | |
369 | { "(g7)", 23 }, | |
370 | { "(g8)", 24 }, | |
371 | { "(g9)", 25 }, | |
372 | { "(g10)", 26 }, | |
373 | { "(g11)", 27 }, | |
374 | { "(g12)", 28 }, | |
375 | { "(g13)", 29 }, | |
376 | { "(g14)", 30 }, | |
377 | { "(fp)", 31 }, | |
378 | ||
379 | #define IPREL 32 | |
380 | /* For assembler internal use only: this number never appears in binary | |
381 | output. */ | |
382 | { "(ip)", IPREL }, | |
383 | ||
384 | { NULL, 0 }, /* END OF LIST */ | |
385 | }; | |
386 | ||
ea1562b3 NC |
387 | /* Hash tables. */ |
388 | static struct hash_control *op_hash; /* Opcode mnemonics. */ | |
389 | static struct hash_control *reg_hash; /* Register name hash table. */ | |
390 | static struct hash_control *areg_hash; /* Abase register hash table. */ | |
252b5132 | 391 | |
ea1562b3 NC |
392 | /* Architecture for which we are assembling. */ |
393 | #define ARCH_ANY 0 /* Default: no architecture checking done. */ | |
252b5132 RH |
394 | #define ARCH_KA 1 |
395 | #define ARCH_KB 2 | |
396 | #define ARCH_MC 3 | |
397 | #define ARCH_CA 4 | |
398 | #define ARCH_JX 5 | |
399 | #define ARCH_HX 6 | |
ea1562b3 | 400 | int architecture = ARCH_ANY; /* Architecture requested on invocation line. */ |
252b5132 | 401 | int iclasses_seen; /* OR of instruction classes (I_* constants) |
ea1562b3 NC |
402 | for which we've actually assembled |
403 | instructions. */ | |
252b5132 | 404 | |
252b5132 RH |
405 | /* BRANCH-PREDICTION INSTRUMENTATION |
406 | ||
407 | The following supports generation of branch-prediction instrumentation | |
408 | (turned on by -b switch). The instrumentation collects counts | |
409 | of branches taken/not-taken for later input to a utility that will | |
410 | set the branch prediction bits of the instructions in accordance with | |
411 | the behavior observed. (Note that the KX series does not have | |
412 | brach-prediction.) | |
413 | ||
414 | The instrumentation consists of: | |
415 | ||
416 | (1) before and after each conditional branch, a call to an external | |
417 | routine that increments and steps over an inline counter. The | |
418 | counter itself, initialized to 0, immediately follows the call | |
419 | instruction. For each branch, the counter following the branch | |
420 | is the number of times the branch was not taken, and the difference | |
421 | between the counters is the number of times it was taken. An | |
422 | example of an instrumented conditional branch: | |
423 | ||
424 | call BR_CNT_FUNC | |
425 | .word 0 | |
426 | LBRANCH23: be label | |
427 | call BR_CNT_FUNC | |
428 | .word 0 | |
429 | ||
430 | (2) a table of pointers to the instrumented branches, so that an | |
431 | external postprocessing routine can locate all of the counters. | |
432 | the table begins with a 2-word header: a pointer to the next in | |
433 | a linked list of such tables (initialized to 0); and a count | |
434 | of the number of entries in the table (exclusive of the header. | |
435 | ||
436 | Note that input source code is expected to already contain calls | |
437 | an external routine that will link the branch local table into a | |
ea1562b3 | 438 | list of such tables. */ |
252b5132 RH |
439 | |
440 | /* Number of branches instrumented so far. Also used to generate | |
441 | unique local labels for each instrumented branch. */ | |
442 | static int br_cnt; | |
443 | ||
444 | #define BR_LABEL_BASE "LBRANCH" | |
445 | /* Basename of local labels on instrumented branches, to avoid | |
446 | conflict with compiler- generated local labels. */ | |
447 | ||
448 | #define BR_CNT_FUNC "__inc_branch" | |
449 | /* Name of the external routine that will increment (and step over) an | |
450 | inline counter. */ | |
451 | ||
452 | #define BR_TAB_NAME "__BRANCH_TABLE__" | |
453 | /* Name of the table of pointers to branches. A local (i.e., | |
454 | non-external) symbol. */ | |
252b5132 | 455 | |
ea1562b3 | 456 | static void ctrl_fmt (char *, long, int); |
252b5132 | 457 | |
ea1562b3 | 458 | \f |
252b5132 | 459 | void |
ea1562b3 | 460 | md_begin (void) |
252b5132 | 461 | { |
ea1562b3 NC |
462 | int i; /* Loop counter. */ |
463 | const struct i960_opcode *oP; /* Pointer into opcode table. */ | |
464 | const char *retval; /* Value returned by hash functions. */ | |
252b5132 RH |
465 | |
466 | op_hash = hash_new (); | |
467 | reg_hash = hash_new (); | |
468 | areg_hash = hash_new (); | |
469 | ||
470 | /* For some reason, the base assembler uses an empty string for "no | |
471 | error message", instead of a NULL pointer. */ | |
472 | retval = 0; | |
473 | ||
474 | for (oP = i960_opcodes; oP->name && !retval; oP++) | |
ea1562b3 | 475 | retval = hash_insert (op_hash, oP->name, (void *) oP); |
252b5132 RH |
476 | |
477 | for (i = 0; regnames[i].reg_name && !retval; i++) | |
478 | retval = hash_insert (reg_hash, regnames[i].reg_name, | |
479 | (char *) ®names[i].reg_num); | |
480 | ||
481 | for (i = 0; aregs[i].areg_name && !retval; i++) | |
482 | retval = hash_insert (areg_hash, aregs[i].areg_name, | |
483 | (char *) &aregs[i].areg_num); | |
484 | ||
485 | if (retval) | |
486 | as_fatal (_("Hashing returned \"%s\"."), retval); | |
487 | } | |
488 | ||
ea1562b3 | 489 | /* parse_expr: parse an expression |
252b5132 | 490 | |
ea1562b3 NC |
491 | Use base assembler's expression parser to parse an expression. |
492 | It, unfortunately, runs off a global which we have to save/restore | |
493 | in order to make it work for us. | |
252b5132 | 494 | |
ea1562b3 | 495 | An empty expression string is treated as an absolute 0. |
252b5132 | 496 | |
ea1562b3 NC |
497 | Sets O_illegal regardless of expression evaluation if entire input |
498 | string is not consumed in the evaluation -- tolerate no dangling junk! */ | |
252b5132 | 499 | |
ea1562b3 NC |
500 | static void |
501 | parse_expr (char *textP, /* Text of expression to be parsed. */ | |
502 | expressionS *expP) /* Where to put the results of parsing. */ | |
503 | { | |
504 | char *save_in; /* Save global here. */ | |
505 | symbolS *symP; | |
252b5132 | 506 | |
ea1562b3 | 507 | know (textP); |
252b5132 | 508 | |
ea1562b3 | 509 | if (*textP == '\0') |
252b5132 | 510 | { |
ea1562b3 NC |
511 | /* Treat empty string as absolute 0. */ |
512 | expP->X_add_symbol = expP->X_op_symbol = NULL; | |
513 | expP->X_add_number = 0; | |
514 | expP->X_op = O_constant; | |
252b5132 | 515 | } |
ea1562b3 | 516 | else |
252b5132 | 517 | { |
ea1562b3 NC |
518 | save_in = input_line_pointer; /* Save global. */ |
519 | input_line_pointer = textP; /* Make parser work for us. */ | |
252b5132 | 520 | |
ea1562b3 NC |
521 | (void) expression (expP); |
522 | if ((size_t) (input_line_pointer - textP) != strlen (textP)) | |
523 | /* Did not consume all of the input. */ | |
524 | expP->X_op = O_illegal; | |
252b5132 | 525 | |
ea1562b3 NC |
526 | symP = expP->X_add_symbol; |
527 | if (symP && (hash_find (reg_hash, S_GET_NAME (symP)))) | |
528 | /* Register name in an expression. */ | |
529 | /* FIXME: this isn't much of a check any more. */ | |
530 | expP->X_op = O_illegal; | |
252b5132 | 531 | |
ea1562b3 | 532 | input_line_pointer = save_in; /* Restore global. */ |
252b5132 | 533 | } |
ea1562b3 NC |
534 | } |
535 | ||
536 | /* emit: output instruction binary | |
537 | ||
538 | Output instruction binary, in target byte order, 4 bytes at a time. | |
539 | Return pointer to where it was placed. */ | |
540 | ||
541 | static char * | |
542 | emit (long instr) /* Word to be output, host byte order. */ | |
543 | { | |
544 | char *toP; /* Where to output it. */ | |
545 | ||
546 | toP = frag_more (4); /* Allocate storage. */ | |
547 | md_number_to_chars (toP, instr, 4); /* Convert to target byte order. */ | |
548 | return toP; | |
549 | } | |
550 | ||
551 | /* get_cdisp: handle displacement for a COBR or CTRL instruction. | |
552 | ||
553 | Parse displacement for a COBR or CTRL instruction. | |
554 | ||
555 | If successful, output the instruction opcode and set up for it, | |
556 | depending on the arg 'var_frag', either: | |
557 | o an address fixup to be done when all symbol values are known, or | |
558 | o a varying length code fragment, with address fixup info. This | |
559 | will be done for cobr instructions that may have to be relaxed | |
560 | in to compare/branch instructions (8 bytes) if the final | |
561 | address displacement is greater than 13 bits. */ | |
562 | ||
563 | static void | |
564 | get_cdisp (char *dispP, /* Displacement as specified in source instruction. */ | |
565 | char *ifmtP, /* "COBR" or "CTRL" (for use in error message). */ | |
566 | long instr, /* Instruction needing the displacement. */ | |
567 | int numbits, /* # bits of displacement (13 for COBR, 24 for CTRL). */ | |
568 | int var_frag,/* 1 if varying length code fragment should be emitted; | |
569 | 0 if an address fix should be emitted. */ | |
570 | int callj) /* 1 if callj relocation should be done; else 0. */ | |
571 | { | |
572 | expressionS e; /* Parsed expression. */ | |
573 | fixS *fixP; /* Structure describing needed address fix. */ | |
574 | char *outP; /* Where instruction binary is output to. */ | |
575 | ||
576 | fixP = NULL; | |
577 | ||
578 | parse_expr (dispP, &e); | |
579 | switch (e.X_op) | |
252b5132 | 580 | { |
ea1562b3 NC |
581 | case O_illegal: |
582 | as_bad (_("expression syntax error")); | |
583 | ||
584 | case O_symbol: | |
585 | if (S_GET_SEGMENT (e.X_add_symbol) == now_seg | |
586 | || S_GET_SEGMENT (e.X_add_symbol) == undefined_section) | |
252b5132 | 587 | { |
ea1562b3 | 588 | if (var_frag) |
252b5132 | 589 | { |
ea1562b3 NC |
590 | outP = frag_more (8); /* Allocate worst-case storage. */ |
591 | md_number_to_chars (outP, instr, 4); | |
592 | frag_variant (rs_machine_dependent, 4, 4, 1, | |
593 | adds (e), offs (e), outP); | |
252b5132 | 594 | } |
ea1562b3 | 595 | else |
252b5132 | 596 | { |
ea1562b3 NC |
597 | /* Set up a new fix structure, so address can be updated |
598 | when all symbol values are known. */ | |
599 | outP = emit (instr); | |
600 | fixP = fix_new (frag_now, | |
601 | outP - frag_now->fr_literal, | |
602 | 4, | |
603 | adds (e), | |
604 | offs (e), | |
605 | 1, | |
606 | NO_RELOC); | |
607 | ||
608 | fixP->fx_tcbit = callj; | |
609 | ||
610 | /* We want to modify a bit field when the address is | |
611 | known. But we don't need all the garbage in the | |
612 | bit_fix structure. So we're going to lie and store | |
613 | the number of bits affected instead of a pointer. */ | |
614 | fixP->fx_bit_fixP = (bit_fixS *) (size_t) numbits; | |
252b5132 | 615 | } |
252b5132 | 616 | } |
ea1562b3 NC |
617 | else |
618 | as_bad (_("attempt to branch into different segment")); | |
619 | break; | |
252b5132 | 620 | |
ea1562b3 NC |
621 | default: |
622 | as_bad (_("target of %s instruction must be a label"), ifmtP); | |
623 | break; | |
624 | } | |
252b5132 RH |
625 | } |
626 | ||
b9195351 | 627 | static int |
ea1562b3 NC |
628 | md_chars_to_number (char * val, /* Value in target byte order. */ |
629 | int n) /* Number of bytes in the input. */ | |
252b5132 RH |
630 | { |
631 | int retval; | |
632 | ||
633 | for (retval = 0; n--;) | |
634 | { | |
635 | retval <<= 8; | |
2132e3a3 | 636 | retval |= (unsigned char) val[n]; |
252b5132 RH |
637 | } |
638 | return retval; | |
639 | } | |
640 | ||
ea1562b3 | 641 | /* mema_to_memb: convert a MEMA-format opcode to a MEMB-format opcode. |
252b5132 | 642 | |
ea1562b3 NC |
643 | There are 2 possible MEMA formats: |
644 | - displacement only | |
645 | - displacement + abase | |
252b5132 | 646 | |
ea1562b3 | 647 | They are distinguished by the setting of the MEMA_ABASE bit. */ |
252b5132 | 648 | |
ea1562b3 NC |
649 | static void |
650 | mema_to_memb (char * opcodeP) /* Where to find the opcode, in target byte order. */ | |
252b5132 | 651 | { |
ea1562b3 NC |
652 | long opcode; /* Opcode in host byte order. */ |
653 | long mode; /* Mode bits for MEMB instruction. */ | |
252b5132 | 654 | |
ea1562b3 NC |
655 | opcode = md_chars_to_number (opcodeP, 4); |
656 | know (!(opcode & MEMB_BIT)); | |
252b5132 | 657 | |
ea1562b3 NC |
658 | mode = MEMB_BIT | D_BIT; |
659 | if (opcode & MEMA_ABASE) | |
660 | mode |= A_BIT; | |
252b5132 | 661 | |
ea1562b3 NC |
662 | opcode &= 0xffffc000; /* Clear MEMA offset and mode bits. */ |
663 | opcode |= mode; /* Set MEMB mode bits. */ | |
252b5132 | 664 | |
ea1562b3 | 665 | md_number_to_chars (opcodeP, opcode, 4); |
252b5132 RH |
666 | } |
667 | ||
ea1562b3 | 668 | /* targ_has_sfr: |
252b5132 | 669 | |
ea1562b3 NC |
670 | Return TRUE iff the target architecture supports the specified |
671 | special-function register (sfr). */ | |
252b5132 | 672 | |
ea1562b3 NC |
673 | static int |
674 | targ_has_sfr (int n) /* Number (0-31) of sfr. */ | |
252b5132 | 675 | { |
ea1562b3 NC |
676 | switch (architecture) |
677 | { | |
678 | case ARCH_KA: | |
679 | case ARCH_KB: | |
680 | case ARCH_MC: | |
681 | case ARCH_JX: | |
682 | return 0; | |
683 | case ARCH_HX: | |
684 | return ((0 <= n) && (n <= 4)); | |
685 | case ARCH_CA: | |
686 | default: | |
687 | return ((0 <= n) && (n <= 2)); | |
688 | } | |
252b5132 RH |
689 | } |
690 | ||
ea1562b3 NC |
691 | /* Look up a (suspected) register name in the register table and return the |
692 | associated register number (or -1 if not found). */ | |
693 | ||
694 | static int | |
695 | get_regnum (char *regname) /* Suspected register name. */ | |
696 | { | |
697 | int *rP; | |
252b5132 | 698 | |
ea1562b3 NC |
699 | rP = (int *) hash_find (reg_hash, regname); |
700 | return (rP == NULL) ? -1 : *rP; | |
701 | } | |
252b5132 | 702 | |
ea1562b3 | 703 | /* syntax: Issue a syntax error. */ |
b9195351 AM |
704 | |
705 | static void | |
ea1562b3 | 706 | syntax (void) |
252b5132 | 707 | { |
ea1562b3 NC |
708 | as_bad (_("syntax error")); |
709 | } | |
252b5132 | 710 | |
ea1562b3 | 711 | /* parse_regop: parse a register operand. |
252b5132 | 712 | |
ea1562b3 NC |
713 | In case of illegal operand, issue a message and return some valid |
714 | information so instruction processing can continue. */ | |
252b5132 | 715 | |
ea1562b3 NC |
716 | static void |
717 | parse_regop (struct regop *regopP, /* Where to put description of register operand. */ | |
718 | char *optext, /* Text of operand. */ | |
719 | char opdesc) /* Descriptor byte: what's legal for this operand. */ | |
720 | { | |
721 | int n; /* Register number. */ | |
722 | expressionS e; /* Parsed expression. */ | |
252b5132 | 723 | |
ea1562b3 NC |
724 | /* See if operand is a register. */ |
725 | n = get_regnum (optext); | |
726 | if (n >= 0) | |
252b5132 | 727 | { |
ea1562b3 NC |
728 | if (IS_RG_REG (n)) |
729 | { | |
730 | /* Global or local register. */ | |
731 | if (!REG_ALIGN (opdesc, n)) | |
732 | as_bad (_("unaligned register")); | |
252b5132 | 733 | |
ea1562b3 NC |
734 | regopP->n = n; |
735 | regopP->mode = 0; | |
736 | regopP->special = 0; | |
737 | return; | |
738 | } | |
739 | else if (IS_FP_REG (n) && FP_OK (opdesc)) | |
740 | { | |
741 | /* Floating point register, and it's allowed. */ | |
742 | regopP->n = n - FP0; | |
743 | regopP->mode = 1; | |
744 | regopP->special = 0; | |
745 | return; | |
746 | } | |
747 | else if (IS_SF_REG (n) && SFR_OK (opdesc)) | |
748 | { | |
749 | /* Special-function register, and it's allowed. */ | |
750 | regopP->n = n - SF0; | |
751 | regopP->mode = 0; | |
752 | regopP->special = 1; | |
753 | if (!targ_has_sfr (regopP->n)) | |
754 | as_bad (_("no such sfr in this architecture")); | |
252b5132 | 755 | |
ea1562b3 NC |
756 | return; |
757 | } | |
758 | } | |
759 | else if (LIT_OK (opdesc)) | |
760 | { | |
761 | /* How about a literal? */ | |
762 | regopP->mode = 1; | |
763 | regopP->special = 0; | |
764 | if (FP_OK (opdesc)) | |
765 | { | |
766 | /* Floating point literal acceptable. */ | |
767 | /* Skip over 0f, 0d, or 0e prefix. */ | |
768 | if ((optext[0] == '0') | |
769 | && (optext[1] >= 'd') | |
770 | && (optext[1] <= 'f')) | |
771 | optext += 2; | |
252b5132 | 772 | |
ea1562b3 NC |
773 | if (!strcmp (optext, "0.0") || !strcmp (optext, "0")) |
774 | { | |
775 | regopP->n = 0x10; | |
776 | return; | |
777 | } | |
252b5132 | 778 | |
ea1562b3 NC |
779 | if (!strcmp (optext, "1.0") || !strcmp (optext, "1")) |
780 | { | |
781 | regopP->n = 0x16; | |
782 | return; | |
783 | } | |
784 | } | |
785 | else | |
786 | { | |
787 | /* Fixed point literal acceptable. */ | |
788 | parse_expr (optext, &e); | |
789 | if (e.X_op != O_constant | |
790 | || (offs (e) < 0) || (offs (e) > 31)) | |
791 | { | |
792 | as_bad (_("illegal literal")); | |
793 | offs (e) = 0; | |
794 | } | |
795 | regopP->n = offs (e); | |
796 | return; | |
797 | } | |
798 | } | |
252b5132 | 799 | |
ea1562b3 NC |
800 | /* Nothing worked. */ |
801 | syntax (); | |
802 | regopP->mode = 0; /* Register r0 is always a good one. */ | |
803 | regopP->n = 0; | |
804 | regopP->special = 0; | |
805 | } | |
252b5132 | 806 | |
ea1562b3 NC |
807 | /* get_ispec: parse a memory operand for an index specification |
808 | ||
809 | Here, an "index specification" is taken to be anything surrounded | |
810 | by square brackets and NOT followed by anything else. | |
252b5132 | 811 | |
ea1562b3 NC |
812 | If it's found, detach it from the input string, remove the surrounding |
813 | square brackets, and return a pointer to it. Otherwise, return NULL. */ | |
252b5132 | 814 | |
ea1562b3 NC |
815 | static char * |
816 | get_ispec (char *textP) /* Pointer to memory operand from source instruction, no white space. */ | |
817 | ||
252b5132 | 818 | { |
ea1562b3 NC |
819 | /* Points to start of index specification. */ |
820 | char *start; | |
821 | /* Points to end of index specification. */ | |
822 | char *end; | |
252b5132 | 823 | |
ea1562b3 NC |
824 | /* Find opening square bracket, if any. */ |
825 | start = strchr (textP, '['); | |
252b5132 | 826 | |
ea1562b3 | 827 | if (start != NULL) |
252b5132 | 828 | { |
ea1562b3 NC |
829 | /* Eliminate '[', detach from rest of operand. */ |
830 | *start++ = '\0'; | |
252b5132 | 831 | |
ea1562b3 | 832 | end = strchr (start, ']'); |
252b5132 | 833 | |
ea1562b3 NC |
834 | if (end == NULL) |
835 | as_bad (_("unmatched '['")); | |
836 | else | |
837 | { | |
838 | /* Eliminate ']' and make sure it was the last thing | |
839 | in the string. */ | |
840 | *end = '\0'; | |
841 | if (*(end + 1) != '\0') | |
842 | as_bad (_("garbage after index spec ignored")); | |
843 | } | |
844 | } | |
845 | return start; | |
846 | } | |
252b5132 | 847 | |
ea1562b3 | 848 | /* parse_memop: parse a memory operand |
252b5132 | 849 | |
ea1562b3 NC |
850 | This routine is based on the observation that the 4 mode bits of the |
851 | MEMB format, taken individually, have fairly consistent meaning: | |
252b5132 | 852 | |
ea1562b3 NC |
853 | M3 (bit 13): 1 if displacement is present (D_BIT) |
854 | M2 (bit 12): 1 for MEMB instructions (MEMB_BIT) | |
855 | M1 (bit 11): 1 if index is present (I_BIT) | |
856 | M0 (bit 10): 1 if abase is present (A_BIT) | |
252b5132 | 857 | |
ea1562b3 NC |
858 | So we parse the memory operand and set bits in the mode as we find |
859 | things. Then at the end, if we go to MEMB format, we need only set | |
860 | the MEMB bit (M2) and our mode is built for us. | |
252b5132 | 861 | |
ea1562b3 | 862 | Unfortunately, I said "fairly consistent". The exceptions: |
252b5132 | 863 | |
ea1562b3 NC |
864 | DBIA |
865 | 0100 Would seem illegal, but means "abase-only". | |
252b5132 | 866 | |
ea1562b3 NC |
867 | 0101 Would seem to mean "abase-only" -- it means IP-relative. |
868 | Must be converted to 0100. | |
252b5132 | 869 | |
ea1562b3 NC |
870 | 0110 Would seem to mean "index-only", but is reserved. |
871 | We turn on the D bit and provide a 0 displacement. | |
252b5132 | 872 | |
ea1562b3 NC |
873 | The other thing to observe is that we parse from the right, peeling |
874 | things * off as we go: first any index spec, then any abase, then | |
875 | the displacement. */ | |
252b5132 | 876 | |
ea1562b3 NC |
877 | static void |
878 | parse_memop (memS *memP, /* Where to put the results. */ | |
879 | char *argP, /* Text of the operand to be parsed. */ | |
880 | int optype) /* MEM1, MEM2, MEM4, MEM8, MEM12, or MEM16. */ | |
252b5132 | 881 | { |
ea1562b3 NC |
882 | char *indexP; /* Pointer to index specification with "[]" removed. */ |
883 | char *p; /* Temp char pointer. */ | |
884 | char iprel_flag; /* True if this is an IP-relative operand. */ | |
885 | int regnum; /* Register number. */ | |
886 | /* Scale factor: 1,2,4,8, or 16. Later converted to internal format | |
887 | (0,1,2,3,4 respectively). */ | |
888 | int scale; | |
889 | int mode; /* MEMB mode bits. */ | |
890 | int *intP; /* Pointer to register number. */ | |
252b5132 | 891 | |
ea1562b3 NC |
892 | /* The following table contains the default scale factors for each |
893 | type of memory instruction. It is accessed using (optype-MEM1) | |
894 | as an index -- thus it assumes the 'optype' constants are | |
895 | assigned consecutive values, in the order they appear in this | |
896 | table. */ | |
897 | static const int def_scale[] = | |
898 | { | |
899 | 1, /* MEM1 */ | |
900 | 2, /* MEM2 */ | |
901 | 4, /* MEM4 */ | |
902 | 8, /* MEM8 */ | |
903 | -1, /* MEM12 -- no valid default */ | |
904 | 16 /* MEM16 */ | |
905 | }; | |
252b5132 | 906 | |
ea1562b3 | 907 | iprel_flag = mode = 0; |
252b5132 | 908 | |
ea1562b3 NC |
909 | /* Any index present? */ |
910 | indexP = get_ispec (argP); | |
911 | if (indexP) | |
252b5132 | 912 | { |
ea1562b3 NC |
913 | p = strchr (indexP, '*'); |
914 | if (p == NULL) | |
915 | { | |
916 | /* No explicit scale -- use default for this instruction | |
917 | type and assembler mode. */ | |
918 | if (flag_mri) | |
919 | scale = 1; | |
920 | else | |
921 | /* GNU960 compatibility */ | |
922 | scale = def_scale[optype - MEM1]; | |
923 | } | |
924 | else | |
925 | { | |
926 | *p++ = '\0'; /* Eliminate '*' */ | |
252b5132 | 927 | |
ea1562b3 NC |
928 | /* Now indexP->a '\0'-terminated register name, |
929 | and p->a scale factor. */ | |
252b5132 | 930 | |
ea1562b3 NC |
931 | if (!strcmp (p, "16")) |
932 | scale = 16; | |
933 | else if (strchr ("1248", *p) && (p[1] == '\0')) | |
934 | scale = *p - '0'; | |
935 | else | |
936 | scale = -1; | |
937 | } | |
252b5132 | 938 | |
ea1562b3 NC |
939 | regnum = get_regnum (indexP); /* Get index reg. # */ |
940 | if (!IS_RG_REG (regnum)) | |
941 | { | |
942 | as_bad (_("invalid index register")); | |
943 | return; | |
944 | } | |
252b5132 | 945 | |
ea1562b3 NC |
946 | /* Convert scale to its binary encoding. */ |
947 | switch (scale) | |
948 | { | |
949 | case 1: | |
950 | scale = 0 << 7; | |
951 | break; | |
952 | case 2: | |
953 | scale = 1 << 7; | |
954 | break; | |
955 | case 4: | |
956 | scale = 2 << 7; | |
957 | break; | |
958 | case 8: | |
959 | scale = 3 << 7; | |
960 | break; | |
961 | case 16: | |
962 | scale = 4 << 7; | |
963 | break; | |
964 | default: | |
965 | as_bad (_("invalid scale factor")); | |
966 | return; | |
967 | }; | |
bedf545c | 968 | |
ea1562b3 NC |
969 | memP->opcode |= scale | regnum; /* Set index bits in opcode. */ |
970 | mode |= I_BIT; /* Found a valid index spec. */ | |
971 | } | |
252b5132 | 972 | |
ea1562b3 NC |
973 | /* Any abase (Register Indirect) specification present? */ |
974 | if ((p = strrchr (argP, '(')) != NULL) | |
975 | { | |
976 | /* "(" is there -- does it start a legal abase spec? If not, it | |
977 | could be part of a displacement expression. */ | |
978 | intP = (int *) hash_find (areg_hash, p); | |
979 | if (intP != NULL) | |
980 | { | |
981 | /* Got an abase here. */ | |
982 | regnum = *intP; | |
983 | *p = '\0'; /* Discard register spec. */ | |
984 | if (regnum == IPREL) | |
985 | /* We have to specialcase ip-rel mode. */ | |
986 | iprel_flag = 1; | |
987 | else | |
988 | { | |
989 | memP->opcode |= regnum << 14; | |
990 | mode |= A_BIT; | |
991 | } | |
992 | } | |
993 | } | |
bedf545c | 994 | |
ea1562b3 NC |
995 | /* Any expression present? */ |
996 | memP->e = argP; | |
997 | if (*argP != '\0') | |
998 | mode |= D_BIT; | |
252b5132 | 999 | |
ea1562b3 NC |
1000 | /* Special-case ip-relative addressing. */ |
1001 | if (iprel_flag) | |
1002 | { | |
1003 | if (mode & I_BIT) | |
1004 | syntax (); | |
1005 | else | |
1006 | { | |
1007 | memP->opcode |= 5 << 10; /* IP-relative mode. */ | |
1008 | memP->disp = 32; | |
1009 | } | |
1010 | return; | |
1011 | } | |
252b5132 | 1012 | |
ea1562b3 NC |
1013 | /* Handle all other modes. */ |
1014 | switch (mode) | |
1015 | { | |
1016 | case D_BIT | A_BIT: | |
1017 | /* Go with MEMA instruction format for now (grow to MEMB later | |
1018 | if 12 bits is not enough for the displacement). MEMA format | |
1019 | has a single mode bit: set it to indicate that abase is | |
1020 | present. */ | |
1021 | memP->opcode |= MEMA_ABASE; | |
1022 | memP->disp = 12; | |
1023 | break; | |
252b5132 | 1024 | |
ea1562b3 NC |
1025 | case D_BIT: |
1026 | /* Go with MEMA instruction format for now (grow to MEMB later | |
1027 | if 12 bits is not enough for the displacement). */ | |
1028 | memP->disp = 12; | |
1029 | break; | |
252b5132 | 1030 | |
ea1562b3 NC |
1031 | case A_BIT: |
1032 | /* For some reason, the bit string for this mode is not | |
1033 | consistent: it should be 0 (exclusive of the MEMB bit), so we | |
1034 | set it "by hand" here. */ | |
1035 | memP->opcode |= MEMB_BIT; | |
1036 | break; | |
252b5132 | 1037 | |
ea1562b3 NC |
1038 | case A_BIT | I_BIT: |
1039 | /* set MEMB bit in mode, and OR in mode bits. */ | |
1040 | memP->opcode |= mode | MEMB_BIT; | |
1041 | break; | |
252b5132 | 1042 | |
ea1562b3 NC |
1043 | case I_BIT: |
1044 | /* Treat missing displacement as displacement of 0. */ | |
1045 | mode |= D_BIT; | |
1046 | /* Fall into next case. */ | |
1047 | case D_BIT | A_BIT | I_BIT: | |
1048 | case D_BIT | I_BIT: | |
1049 | /* Set MEMB bit in mode, and OR in mode bits. */ | |
1050 | memP->opcode |= mode | MEMB_BIT; | |
1051 | memP->disp = 32; | |
1052 | break; | |
252b5132 | 1053 | |
ea1562b3 NC |
1054 | default: |
1055 | syntax (); | |
1056 | break; | |
1057 | } | |
1058 | } | |
252b5132 | 1059 | |
ea1562b3 | 1060 | /* Generate a MEMA- or MEMB-format instruction. */ |
252b5132 | 1061 | |
ea1562b3 NC |
1062 | static void |
1063 | mem_fmt (char *args[], /* args[0]->opcode mnemonic, args[1-3]->operands. */ | |
1064 | struct i960_opcode *oP,/* Pointer to description of instruction. */ | |
1065 | int callx) /* Is this a callx opcode. */ | |
252b5132 | 1066 | { |
ea1562b3 NC |
1067 | int i; /* Loop counter. */ |
1068 | struct regop regop; /* Description of register operand. */ | |
1069 | char opdesc; /* Operand descriptor byte. */ | |
1070 | memS instr; /* Description of binary to be output. */ | |
1071 | char *outP; /* Where the binary was output to. */ | |
1072 | expressionS expr; /* Parsed expression. */ | |
1073 | /* ->description of deferred address fixup. */ | |
252b5132 RH |
1074 | fixS *fixP; |
1075 | ||
ea1562b3 NC |
1076 | #ifdef OBJ_COFF |
1077 | /* COFF support isn't in place yet for callx relaxing. */ | |
1078 | callx = 0; | |
1079 | #endif | |
252b5132 | 1080 | |
ea1562b3 NC |
1081 | memset (&instr, '\0', sizeof (memS)); |
1082 | instr.opcode = oP->opcode; | |
252b5132 | 1083 | |
ea1562b3 NC |
1084 | /* Process operands. */ |
1085 | for (i = 1; i <= oP->num_ops; i++) | |
252b5132 | 1086 | { |
ea1562b3 NC |
1087 | opdesc = oP->operand[i - 1]; |
1088 | ||
1089 | if (MEMOP (opdesc)) | |
1090 | parse_memop (&instr, args[i], oP->format); | |
1091 | else | |
1092 | { | |
1093 | parse_regop (®op, args[i], opdesc); | |
1094 | instr.opcode |= regop.n << 19; | |
1095 | } | |
252b5132 | 1096 | } |
252b5132 | 1097 | |
ea1562b3 NC |
1098 | /* Parse the displacement; this must be done before emitting the |
1099 | opcode, in case it is an expression using `.'. */ | |
1100 | parse_expr (instr.e, &expr); | |
252b5132 | 1101 | |
ea1562b3 NC |
1102 | /* Output opcode. */ |
1103 | outP = emit (instr.opcode); | |
252b5132 | 1104 | |
ea1562b3 NC |
1105 | if (instr.disp == 0) |
1106 | return; | |
252b5132 | 1107 | |
ea1562b3 NC |
1108 | /* Process the displacement. */ |
1109 | switch (expr.X_op) | |
252b5132 | 1110 | { |
ea1562b3 NC |
1111 | case O_illegal: |
1112 | as_bad (_("expression syntax error")); | |
1113 | break; | |
252b5132 | 1114 | |
ea1562b3 NC |
1115 | case O_constant: |
1116 | if (instr.disp == 32) | |
1117 | (void) emit (offs (expr)); /* Output displacement. */ | |
1118 | else | |
1119 | { | |
1120 | /* 12-bit displacement. */ | |
1121 | if (offs (expr) & ~0xfff) | |
1122 | { | |
1123 | /* Won't fit in 12 bits: convert already-output | |
1124 | instruction to MEMB format, output | |
1125 | displacement. */ | |
1126 | mema_to_memb (outP); | |
1127 | (void) emit (offs (expr)); | |
1128 | } | |
1129 | else | |
1130 | { | |
1131 | /* WILL fit in 12 bits: OR into opcode and | |
1132 | overwrite the binary we already put out. */ | |
1133 | instr.opcode |= offs (expr); | |
1134 | md_number_to_chars (outP, instr.opcode, 4); | |
1135 | } | |
1136 | } | |
1137 | break; | |
252b5132 | 1138 | |
ea1562b3 NC |
1139 | default: |
1140 | if (instr.disp == 12) | |
1141 | /* Displacement is dependent on a symbol, whose value | |
1142 | may change at link time. We HAVE to reserve 32 bits. | |
1143 | Convert already-output opcode to MEMB format. */ | |
1144 | mema_to_memb (outP); | |
1145 | ||
1146 | /* Output 0 displacement and set up address fixup for when | |
1147 | this symbol's value becomes known. */ | |
1148 | outP = emit ((long) 0); | |
1149 | fixP = fix_new_exp (frag_now, | |
1150 | outP - frag_now->fr_literal, | |
1151 | 4, & expr, 0, NO_RELOC); | |
1152 | /* Steve's linker relaxing hack. Mark this 32-bit relocation as | |
1153 | being in the instruction stream, specifically as part of a callx | |
1154 | instruction. */ | |
1155 | fixP->fx_bsr = callx; | |
1156 | break; | |
252b5132 | 1157 | } |
ea1562b3 NC |
1158 | } |
1159 | ||
1160 | /* targ_has_iclass: | |
1161 | ||
1162 | Return TRUE iff the target architecture supports the indicated | |
1163 | class of instructions. */ | |
1164 | ||
1165 | static int | |
1166 | targ_has_iclass (int ic) /* Instruction class; one of: | |
1167 | I_BASE, I_CX, I_DEC, I_KX, I_FP, I_MIL, I_CASIM, I_CX2, I_HX, I_HX2. */ | |
1168 | { | |
1169 | iclasses_seen |= ic; | |
1170 | ||
1171 | switch (architecture) | |
252b5132 | 1172 | { |
ea1562b3 NC |
1173 | case ARCH_KA: |
1174 | return ic & (I_BASE | I_KX); | |
1175 | case ARCH_KB: | |
1176 | return ic & (I_BASE | I_KX | I_FP | I_DEC); | |
1177 | case ARCH_MC: | |
1178 | return ic & (I_BASE | I_KX | I_FP | I_DEC | I_MIL); | |
1179 | case ARCH_CA: | |
1180 | return ic & (I_BASE | I_CX | I_CX2 | I_CASIM); | |
1181 | case ARCH_JX: | |
1182 | return ic & (I_BASE | I_CX2 | I_JX); | |
1183 | case ARCH_HX: | |
1184 | return ic & (I_BASE | I_CX2 | I_JX | I_HX); | |
1185 | default: | |
1186 | if ((iclasses_seen & (I_KX | I_FP | I_DEC | I_MIL)) | |
1187 | && (iclasses_seen & (I_CX | I_CX2))) | |
252b5132 | 1188 | { |
ea1562b3 NC |
1189 | as_warn (_("architecture of opcode conflicts with that of earlier instruction(s)")); |
1190 | iclasses_seen &= ~ic; | |
252b5132 | 1191 | } |
ea1562b3 NC |
1192 | return 1; |
1193 | } | |
1194 | } | |
252b5132 | 1195 | |
ea1562b3 NC |
1196 | /* shift_ok: |
1197 | Determine if a "shlo" instruction can be used to implement a "ldconst". | |
1198 | This means that some number X < 32 can be shifted left to produce the | |
1199 | constant of interest. | |
252b5132 | 1200 | |
ea1562b3 NC |
1201 | Return the shift count, or 0 if we can't do it. |
1202 | Caller calculates X by shifting original constant right 'shift' places. */ | |
1203 | ||
1204 | static int | |
1205 | shift_ok (int n) /* The constant of interest. */ | |
1206 | { | |
1207 | int shift; /* The shift count. */ | |
1208 | ||
1209 | if (n <= 0) | |
1210 | /* Can't do it for negative numbers. */ | |
1211 | return 0; | |
1212 | ||
1213 | /* Shift 'n' right until a 1 is about to be lost. */ | |
1214 | for (shift = 0; (n & 1) == 0; shift++) | |
1215 | n >>= 1; | |
1216 | ||
1217 | if (n >= 32) | |
1218 | return 0; | |
1219 | ||
1220 | return shift; | |
1221 | } | |
1222 | ||
1223 | /* parse_ldcont: | |
1224 | Parse and replace a 'ldconst' pseudo-instruction with an appropriate | |
1225 | i80960 instruction. | |
1226 | ||
1227 | Assumes the input consists of: | |
1228 | arg[0] opcode mnemonic ('ldconst') | |
1229 | arg[1] first operand (constant) | |
1230 | arg[2] name of register to be loaded | |
1231 | ||
1232 | Replaces opcode and/or operands as appropriate. | |
1233 | ||
1234 | Returns the new number of arguments, or -1 on failure. */ | |
1235 | ||
1236 | static int | |
1237 | parse_ldconst (char *arg[]) /* See above. */ | |
1238 | { | |
1239 | int n; /* Constant to be loaded. */ | |
1240 | int shift; /* Shift count for "shlo" instruction. */ | |
1241 | static char buf[5]; /* Literal for first operand. */ | |
1242 | static char buf2[5]; /* Literal for second operand. */ | |
1243 | expressionS e; /* Parsed expression. */ | |
1244 | ||
1245 | arg[3] = NULL; /* So we can tell at the end if it got used or not. */ | |
1246 | ||
1247 | parse_expr (arg[1], &e); | |
1248 | switch (e.X_op) | |
1249 | { | |
1250 | default: | |
1251 | /* We're dependent on one or more symbols -- use "lda". */ | |
1252 | arg[0] = "lda"; | |
1253 | break; | |
1254 | ||
1255 | case O_constant: | |
1256 | /* Try the following mappings: | |
1257 | ldconst 0,<reg> -> mov 0,<reg> | |
1258 | ldconst 31,<reg> -> mov 31,<reg> | |
1259 | ldconst 32,<reg> -> addo 1,31,<reg> | |
1260 | ldconst 62,<reg> -> addo 31,31,<reg> | |
1261 | ldconst 64,<reg> -> shlo 8,3,<reg> | |
1262 | ldconst -1,<reg> -> subo 1,0,<reg> | |
1263 | ldconst -31,<reg> -> subo 31,0,<reg> | |
1264 | ||
1265 | Anything else becomes: | |
1266 | lda xxx,<reg>. */ | |
1267 | n = offs (e); | |
1268 | if ((0 <= n) && (n <= 31)) | |
1269 | arg[0] = "mov"; | |
1270 | else if ((-31 <= n) && (n <= -1)) | |
252b5132 | 1271 | { |
ea1562b3 NC |
1272 | arg[0] = "subo"; |
1273 | arg[3] = arg[2]; | |
1274 | sprintf (buf, "%d", -n); | |
1275 | arg[1] = buf; | |
1276 | arg[2] = "0"; | |
1277 | } | |
1278 | else if ((32 <= n) && (n <= 62)) | |
1279 | { | |
1280 | arg[0] = "addo"; | |
1281 | arg[3] = arg[2]; | |
1282 | arg[1] = "31"; | |
1283 | sprintf (buf, "%d", n - 31); | |
1284 | arg[2] = buf; | |
252b5132 | 1285 | } |
ea1562b3 NC |
1286 | else if ((shift = shift_ok (n)) != 0) |
1287 | { | |
1288 | arg[0] = "shlo"; | |
1289 | arg[3] = arg[2]; | |
1290 | sprintf (buf, "%d", shift); | |
1291 | arg[1] = buf; | |
1292 | sprintf (buf2, "%d", n >> shift); | |
1293 | arg[2] = buf2; | |
1294 | } | |
1295 | else | |
1296 | arg[0] = "lda"; | |
1297 | break; | |
1298 | ||
1299 | case O_illegal: | |
1300 | as_bad (_("invalid constant")); | |
1301 | return -1; | |
1302 | break; | |
252b5132 | 1303 | } |
ea1562b3 NC |
1304 | return (arg[3] == 0) ? 2 : 3; |
1305 | } | |
252b5132 | 1306 | |
ea1562b3 | 1307 | /* reg_fmt: generate a REG-format instruction. */ |
252b5132 | 1308 | |
b9195351 | 1309 | static void |
ea1562b3 NC |
1310 | reg_fmt (char *args[], /* args[0]->opcode mnemonic, args[1-3]->operands. */ |
1311 | struct i960_opcode *oP)/* Pointer to description of instruction. */ | |
252b5132 | 1312 | { |
ea1562b3 NC |
1313 | long instr; /* Binary to be output. */ |
1314 | struct regop regop; /* Description of register operand. */ | |
1315 | int n_ops; /* Number of operands. */ | |
252b5132 | 1316 | |
ea1562b3 NC |
1317 | instr = oP->opcode; |
1318 | n_ops = oP->num_ops; | |
252b5132 | 1319 | |
ea1562b3 NC |
1320 | if (n_ops >= 1) |
1321 | { | |
1322 | parse_regop (®op, args[1], oP->operand[0]); | |
252b5132 | 1323 | |
ea1562b3 | 1324 | if ((n_ops == 1) && !(instr & M3)) |
252b5132 | 1325 | { |
ea1562b3 NC |
1326 | /* 1-operand instruction in which the dst field should |
1327 | be used (instead of src1). */ | |
1328 | regop.n <<= 19; | |
1329 | if (regop.special) | |
1330 | regop.mode = regop.special; | |
1331 | regop.mode <<= 13; | |
1332 | regop.special = 0; | |
252b5132 | 1333 | } |
ea1562b3 | 1334 | else |
252b5132 | 1335 | { |
ea1562b3 NC |
1336 | /* regop.n goes in bit 0, needs no shifting. */ |
1337 | regop.mode <<= 11; | |
1338 | regop.special <<= 5; | |
252b5132 | 1339 | } |
ea1562b3 | 1340 | instr |= regop.n | regop.mode | regop.special; |
252b5132 RH |
1341 | } |
1342 | ||
ea1562b3 NC |
1343 | if (n_ops >= 2) |
1344 | { | |
1345 | parse_regop (®op, args[2], oP->operand[1]); | |
252b5132 | 1346 | |
ea1562b3 NC |
1347 | if ((n_ops == 2) && !(instr & M3)) |
1348 | { | |
1349 | /* 2-operand instruction in which the dst field should | |
1350 | be used instead of src2). */ | |
1351 | regop.n <<= 19; | |
1352 | if (regop.special) | |
1353 | regop.mode = regop.special; | |
1354 | regop.mode <<= 13; | |
1355 | regop.special = 0; | |
1356 | } | |
1357 | else | |
1358 | { | |
1359 | regop.n <<= 14; | |
1360 | regop.mode <<= 12; | |
1361 | regop.special <<= 6; | |
1362 | } | |
1363 | instr |= regop.n | regop.mode | regop.special; | |
1364 | } | |
1365 | if (n_ops == 3) | |
1366 | { | |
1367 | parse_regop (®op, args[3], oP->operand[2]); | |
1368 | if (regop.special) | |
1369 | regop.mode = regop.special; | |
1370 | instr |= (regop.n <<= 19) | (regop.mode <<= 13); | |
1371 | } | |
1372 | emit (instr); | |
252b5132 RH |
1373 | } |
1374 | ||
ea1562b3 | 1375 | /* get_args: break individual arguments out of comma-separated list |
252b5132 RH |
1376 | |
1377 | Input assumptions: | |
1378 | - all comments and labels have been removed | |
1379 | - all strings of whitespace have been collapsed to a single blank. | |
1380 | - all character constants ('x') have been replaced with decimal | |
1381 | ||
1382 | Output: | |
1383 | args[0] is untouched. args[1] points to first operand, etc. All args: | |
1384 | - are NULL-terminated | |
1385 | - contain no whitespace | |
1386 | ||
1387 | Return value: | |
ea1562b3 | 1388 | Number of operands (0,1,2, or 3) or -1 on error. */ |
252b5132 | 1389 | |
252b5132 | 1390 | static int |
ea1562b3 NC |
1391 | get_args (char *p, /* Pointer to comma-separated operands; Mucked by us. */ |
1392 | char *args[]) /* Output arg: pointers to operands placed in args[1-3]. | |
1393 | Must accommodate 4 entries (args[0-3]). */ | |
1394 | ||
252b5132 | 1395 | { |
ea1562b3 NC |
1396 | int n; /* Number of operands. */ |
1397 | char *to; | |
252b5132 | 1398 | |
ea1562b3 | 1399 | /* Skip lead white space. */ |
252b5132 | 1400 | while (*p == ' ') |
ea1562b3 | 1401 | p++; |
252b5132 RH |
1402 | |
1403 | if (*p == '\0') | |
ea1562b3 | 1404 | return 0; |
252b5132 RH |
1405 | |
1406 | n = 1; | |
1407 | args[1] = p; | |
1408 | ||
1409 | /* Squeze blanks out by moving non-blanks toward start of string. | |
ea1562b3 | 1410 | Isolate operands, whenever comma is found. */ |
252b5132 RH |
1411 | to = p; |
1412 | while (*p != '\0') | |
1413 | { | |
252b5132 | 1414 | if (*p == ' ' |
3882b010 L |
1415 | && (! ISALNUM (p[1]) |
1416 | || ! ISALNUM (p[-1]))) | |
ea1562b3 | 1417 | p++; |
252b5132 RH |
1418 | else if (*p == ',') |
1419 | { | |
ea1562b3 | 1420 | /* Start of operand. */ |
252b5132 RH |
1421 | if (n == 3) |
1422 | { | |
1423 | as_bad (_("too many operands")); | |
1424 | return -1; | |
1425 | } | |
ea1562b3 NC |
1426 | *to++ = '\0'; /* Terminate argument. */ |
1427 | args[++n] = to; /* Start next argument. */ | |
252b5132 | 1428 | p++; |
252b5132 RH |
1429 | } |
1430 | else | |
ea1562b3 | 1431 | *to++ = *p++; |
252b5132 RH |
1432 | } |
1433 | *to = '\0'; | |
1434 | return n; | |
1435 | } | |
1436 | ||
ea1562b3 | 1437 | /* i_scan: perform lexical scan of ascii assembler instruction. |
252b5132 | 1438 | |
ea1562b3 NC |
1439 | Input assumptions: |
1440 | - input string is an i80960 instruction (not a pseudo-op) | |
1441 | - all comments and labels have been removed | |
1442 | - all strings of whitespace have been collapsed to a single blank. | |
252b5132 | 1443 | |
ea1562b3 NC |
1444 | Output: |
1445 | args[0] points to opcode, other entries point to operands. All strings: | |
1446 | - are NULL-terminated | |
1447 | - contain no whitespace | |
1448 | - have character constants ('x') replaced with a decimal number | |
252b5132 RH |
1449 | |
1450 | Return value: | |
ea1562b3 | 1451 | Number of operands (0,1,2, or 3) or -1 on error. */ |
252b5132 | 1452 | |
252b5132 | 1453 | static int |
ea1562b3 NC |
1454 | i_scan (char *iP, /* Pointer to ascii instruction; Mucked by us. */ |
1455 | char *args[]) /* Output arg: pointers to opcode and operands placed here. | |
1456 | Must accommodate 4 entries. */ | |
252b5132 | 1457 | { |
ea1562b3 | 1458 | /* Isolate opcode. */ |
252b5132 | 1459 | if (*(iP) == ' ') |
ea1562b3 NC |
1460 | iP++; |
1461 | ||
252b5132 RH |
1462 | args[0] = iP; |
1463 | for (; *iP != ' '; iP++) | |
1464 | { | |
1465 | if (*iP == '\0') | |
1466 | { | |
ea1562b3 | 1467 | /* There are no operands. */ |
252b5132 RH |
1468 | if (args[0] == iP) |
1469 | { | |
ea1562b3 | 1470 | /* We never moved: there was no opcode either! */ |
252b5132 RH |
1471 | as_bad (_("missing opcode")); |
1472 | return -1; | |
1473 | } | |
1474 | return 0; | |
1475 | } | |
1476 | } | |
ea1562b3 | 1477 | *iP++ = '\0'; |
252b5132 | 1478 | return (get_args (iP, args)); |
ea1562b3 | 1479 | } |
252b5132 | 1480 | |
252b5132 | 1481 | static void |
ea1562b3 NC |
1482 | brcnt_emit (void) |
1483 | { | |
1484 | /* Emit call to "increment" routine. */ | |
1485 | ctrl_fmt (BR_CNT_FUNC, CALL, 1); | |
1486 | /* Emit inline counter to be incremented. */ | |
1487 | emit (0); | |
1488 | } | |
252b5132 | 1489 | |
ea1562b3 NC |
1490 | static char * |
1491 | brlab_next (void) | |
1492 | { | |
1493 | static char buf[20]; | |
252b5132 | 1494 | |
ea1562b3 NC |
1495 | sprintf (buf, "%s%d", BR_LABEL_BASE, br_cnt++); |
1496 | return buf; | |
1497 | } | |
252b5132 | 1498 | |
ea1562b3 NC |
1499 | static void |
1500 | ctrl_fmt (char *targP, /* Pointer to text of lone operand (if any). */ | |
1501 | long opcode, /* Template of instruction. */ | |
1502 | int num_ops) /* Number of operands. */ | |
1503 | { | |
1504 | int instrument; /* TRUE iff we should add instrumentation to track | |
1505 | how often the branch is taken. */ | |
1506 | ||
1507 | if (num_ops == 0) | |
1508 | emit (opcode); /* Output opcode. */ | |
1509 | else | |
252b5132 | 1510 | { |
ea1562b3 NC |
1511 | instrument = instrument_branches && (opcode != CALL) |
1512 | && (opcode != B) && (opcode != RET) && (opcode != BAL); | |
252b5132 | 1513 | |
ea1562b3 | 1514 | if (instrument) |
252b5132 | 1515 | { |
ea1562b3 NC |
1516 | brcnt_emit (); |
1517 | colon (brlab_next ()); | |
252b5132 | 1518 | } |
ea1562b3 NC |
1519 | |
1520 | /* The operand MUST be an ip-relative displacement. Parse it | |
1521 | and set up address fix for the instruction we just output. */ | |
1522 | get_cdisp (targP, "CTRL", opcode, 24, 0, 0); | |
1523 | ||
1524 | if (instrument) | |
1525 | brcnt_emit (); | |
252b5132 | 1526 | } |
ea1562b3 | 1527 | } |
252b5132 | 1528 | |
ea1562b3 NC |
1529 | static void |
1530 | cobr_fmt (/* arg[0]->opcode mnemonic, arg[1-3]->operands (ascii) */ | |
1531 | char *arg[], | |
1532 | /* Opcode, with branch-prediction bits already set if necessary. */ | |
1533 | long opcode, | |
1534 | /* Pointer to description of instruction. */ | |
1535 | struct i960_opcode *oP) | |
1536 | { | |
1537 | long instr; /* 32-bit instruction. */ | |
1538 | struct regop regop; /* Description of register operand. */ | |
1539 | int n; /* Number of operands. */ | |
1540 | int var_frag; /* 1 if varying length code fragment should | |
1541 | be emitted; 0 if an address fix | |
1542 | should be emitted. */ | |
252b5132 | 1543 | |
ea1562b3 NC |
1544 | instr = opcode; |
1545 | n = oP->num_ops; | |
252b5132 | 1546 | |
ea1562b3 | 1547 | if (n >= 1) |
252b5132 | 1548 | { |
ea1562b3 NC |
1549 | /* First operand (if any) of a COBR is always a register |
1550 | operand. Parse it. */ | |
1551 | parse_regop (®op, arg[1], oP->operand[0]); | |
1552 | instr |= (regop.n << 19) | (regop.mode << 13); | |
252b5132 RH |
1553 | } |
1554 | ||
ea1562b3 | 1555 | if (n >= 2) |
252b5132 | 1556 | { |
ea1562b3 NC |
1557 | /* Second operand (if any) of a COBR is always a register |
1558 | operand. Parse it. */ | |
1559 | parse_regop (®op, arg[2], oP->operand[1]); | |
1560 | instr |= (regop.n << 14) | regop.special; | |
1561 | } | |
252b5132 | 1562 | |
ea1562b3 NC |
1563 | if (n < 3) |
1564 | emit (instr); | |
1565 | else | |
1566 | { | |
1567 | if (instrument_branches) | |
252b5132 | 1568 | { |
ea1562b3 NC |
1569 | brcnt_emit (); |
1570 | colon (brlab_next ()); | |
252b5132 | 1571 | } |
252b5132 | 1572 | |
ea1562b3 NC |
1573 | /* A third operand to a COBR is always a displacement. Parse |
1574 | it; if it's relaxable (a cobr "j" directive, or any cobr | |
1575 | other than bbs/bbc when the "-norelax" option is not in use) | |
1576 | set up a variable code fragment; otherwise set up an address | |
1577 | fix. */ | |
1578 | var_frag = !norelax || (oP->format == COJ); /* TRUE or FALSE */ | |
1579 | get_cdisp (arg[3], "COBR", instr, 13, var_frag, 0); | |
252b5132 | 1580 | |
ea1562b3 NC |
1581 | if (instrument_branches) |
1582 | brcnt_emit (); | |
252b5132 | 1583 | } |
ea1562b3 | 1584 | } |
252b5132 | 1585 | |
ea1562b3 NC |
1586 | /* Assumptions about the passed-in text: |
1587 | - all comments, labels removed | |
1588 | - text is an instruction | |
1589 | - all white space compressed to single blanks | |
1590 | - all character constants have been replaced with decimal. */ | |
252b5132 | 1591 | |
ea1562b3 NC |
1592 | void |
1593 | md_assemble (char *textP) | |
1594 | { | |
1595 | /* Parsed instruction text, containing NO whitespace: arg[0]->opcode | |
1596 | mnemonic arg[1-3]->operands, with char constants replaced by | |
1597 | decimal numbers. */ | |
1598 | char *args[4]; | |
1599 | /* Number of instruction operands. */ | |
1600 | int n_ops; | |
1601 | /* Pointer to instruction description. */ | |
1602 | struct i960_opcode *oP; | |
1603 | /* TRUE iff opcode mnemonic included branch-prediction suffix (".f" | |
1604 | or ".t"). */ | |
1605 | int branch_predict; | |
1606 | /* Setting of branch-prediction bit(s) to be OR'd into instruction | |
1607 | opcode of CTRL/COBR format instructions. */ | |
1608 | long bp_bits; | |
1609 | /* Offset of last character in opcode mnemonic. */ | |
1610 | int n; | |
1611 | const char *bp_error_msg = _("branch prediction invalid on this opcode"); | |
252b5132 | 1612 | |
ea1562b3 NC |
1613 | /* Parse instruction into opcode and operands. */ |
1614 | memset (args, '\0', sizeof (args)); | |
252b5132 | 1615 | |
ea1562b3 | 1616 | n_ops = i_scan (textP, args); |
252b5132 | 1617 | |
ea1562b3 NC |
1618 | if (n_ops == -1) |
1619 | return; /* Error message already issued. */ | |
252b5132 | 1620 | |
ea1562b3 NC |
1621 | /* Do "macro substitution" (sort of) on 'ldconst' pseudo-instruction. */ |
1622 | if (!strcmp (args[0], "ldconst")) | |
252b5132 | 1623 | { |
ea1562b3 NC |
1624 | n_ops = parse_ldconst (args); |
1625 | if (n_ops == -1) | |
1626 | return; | |
252b5132 RH |
1627 | } |
1628 | ||
ea1562b3 NC |
1629 | /* Check for branch-prediction suffix on opcode mnemonic, strip it off. */ |
1630 | n = strlen (args[0]) - 1; | |
1631 | branch_predict = 0; | |
1632 | bp_bits = 0; | |
252b5132 | 1633 | |
ea1562b3 | 1634 | if (args[0][n - 1] == '.' && (args[0][n] == 't' || args[0][n] == 'f')) |
252b5132 | 1635 | { |
ea1562b3 NC |
1636 | /* We could check here to see if the target architecture |
1637 | supports branch prediction, but why bother? The bit will | |
1638 | just be ignored by processors that don't use it. */ | |
1639 | branch_predict = 1; | |
1640 | bp_bits = (args[0][n] == 't') ? BP_TAKEN : BP_NOT_TAKEN; | |
1641 | args[0][n - 1] = '\0'; /* Strip suffix from opcode mnemonic */ | |
252b5132 | 1642 | } |
252b5132 | 1643 | |
ea1562b3 NC |
1644 | /* Look up opcode mnemonic in table and check number of operands. |
1645 | Check that opcode is legal for the target architecture. If all | |
1646 | looks good, assemble instruction. */ | |
1647 | oP = (struct i960_opcode *) hash_find (op_hash, args[0]); | |
1648 | if (!oP || !targ_has_iclass (oP->iclass)) | |
1649 | as_bad (_("invalid opcode, \"%s\"."), args[0]); | |
1650 | else if (n_ops != oP->num_ops) | |
1651 | as_bad (_("improper number of operands. expecting %d, got %d"), | |
1652 | oP->num_ops, n_ops); | |
1653 | else | |
252b5132 | 1654 | { |
ea1562b3 | 1655 | switch (oP->format) |
252b5132 | 1656 | { |
ea1562b3 NC |
1657 | case FBRA: |
1658 | case CTRL: | |
1659 | ctrl_fmt (args[1], oP->opcode | bp_bits, oP->num_ops); | |
1660 | if (oP->format == FBRA) | |
1661 | /* Now generate a 'bno' to same arg */ | |
1662 | ctrl_fmt (args[1], BNO | bp_bits, 1); | |
252b5132 | 1663 | break; |
ea1562b3 NC |
1664 | case COBR: |
1665 | case COJ: | |
1666 | cobr_fmt (args, oP->opcode | bp_bits, oP); | |
252b5132 | 1667 | break; |
ea1562b3 NC |
1668 | case REG: |
1669 | if (branch_predict) | |
1670 | as_warn (bp_error_msg); | |
1671 | reg_fmt (args, oP); | |
252b5132 | 1672 | break; |
ea1562b3 NC |
1673 | case MEM1: |
1674 | if (args[0][0] == 'c' && args[0][1] == 'a') | |
1675 | { | |
1676 | if (branch_predict) | |
1677 | as_warn (bp_error_msg); | |
1678 | mem_fmt (args, oP, 1); | |
1679 | break; | |
1680 | } | |
1681 | case MEM2: | |
1682 | case MEM4: | |
1683 | case MEM8: | |
1684 | case MEM12: | |
1685 | case MEM16: | |
1686 | if (branch_predict) | |
1687 | as_warn (bp_error_msg); | |
1688 | mem_fmt (args, oP, 0); | |
252b5132 | 1689 | break; |
ea1562b3 NC |
1690 | case CALLJ: |
1691 | if (branch_predict) | |
1692 | as_warn (bp_error_msg); | |
1693 | /* Output opcode & set up "fixup" (relocation); flag | |
1694 | relocation as 'callj' type. */ | |
1695 | know (oP->num_ops == 1); | |
1696 | get_cdisp (args[1], "CTRL", oP->opcode, 24, 0, 1); | |
252b5132 RH |
1697 | break; |
1698 | default: | |
ea1562b3 NC |
1699 | BAD_CASE (oP->format); |
1700 | break; | |
252b5132 | 1701 | } |
252b5132 | 1702 | } |
ea1562b3 | 1703 | } |
252b5132 | 1704 | |
ea1562b3 NC |
1705 | void |
1706 | md_number_to_chars (char *buf, | |
1707 | valueT value, | |
1708 | int n) | |
1709 | { | |
1710 | number_to_chars_littleendian (buf, value, n); | |
1711 | } | |
252b5132 | 1712 | |
ea1562b3 NC |
1713 | char * |
1714 | md_atof (int type, char *litP, int *sizeP) | |
252b5132 | 1715 | { |
499ac353 | 1716 | return ieee_md_atof (type, litP, sizeP, FALSE); |
ea1562b3 | 1717 | } |
252b5132 | 1718 | |
ea1562b3 NC |
1719 | static void |
1720 | md_number_to_imm (char *buf, long val, int n) | |
1721 | { | |
1722 | md_number_to_chars (buf, val, n); | |
1723 | } | |
252b5132 | 1724 | |
252b5132 | 1725 | static void |
ea1562b3 NC |
1726 | md_number_to_field (char *instrP, /* Pointer to instruction to be fixed. */ |
1727 | long val, /* Address fixup value. */ | |
1728 | bit_fixS *bfixP) /* Description of bit field to be fixed up. */ | |
252b5132 | 1729 | { |
ea1562b3 NC |
1730 | int numbits; /* Length of bit field to be fixed. */ |
1731 | long instr; /* 32-bit instruction to be fixed-up. */ | |
1732 | long sign; /* 0 or -1, according to sign bit of 'val'. */ | |
252b5132 | 1733 | |
ea1562b3 NC |
1734 | /* Convert instruction back to host byte order. */ |
1735 | instr = md_chars_to_number (instrP, 4); | |
252b5132 | 1736 | |
ea1562b3 NC |
1737 | /* Surprise! -- we stored the number of bits to be modified rather |
1738 | than a pointer to a structure. */ | |
1739 | numbits = (int) (size_t) bfixP; | |
1740 | if (numbits == 1) | |
1741 | /* This is a no-op, stuck here by reloc_callj(). */ | |
1742 | return; | |
252b5132 | 1743 | |
ea1562b3 | 1744 | know ((numbits == 13) || (numbits == 24)); |
252b5132 | 1745 | |
ea1562b3 NC |
1746 | /* Propagate sign bit of 'val' for the given number of bits. Result |
1747 | should be all 0 or all 1. */ | |
1748 | sign = val >> ((int) numbits - 1); | |
1749 | if (((val < 0) && (sign != -1)) | |
1750 | || ((val > 0) && (sign != 0))) | |
1751 | as_bad (_("Fixup of %ld too large for field width of %d"), | |
1752 | val, numbits); | |
1753 | else | |
252b5132 | 1754 | { |
ea1562b3 NC |
1755 | /* Put bit field into instruction and write back in target |
1756 | * byte order. */ | |
1757 | val &= ~(-1 << (int) numbits); /* Clear unused sign bits. */ | |
1758 | instr |= val; | |
1759 | md_number_to_chars (instrP, instr, 4); | |
252b5132 | 1760 | } |
ea1562b3 NC |
1761 | } |
1762 | \f | |
1763 | ||
1764 | /* md_parse_option | |
1765 | Invocation line includes a switch not recognized by the base assembler. | |
1766 | See if it's a processor-specific option. For the 960, these are: | |
1767 | ||
1768 | -norelax: | |
1769 | Conditional branch instructions that require displacements | |
1770 | greater than 13 bits (or that have external targets) should | |
1771 | generate errors. The default is to replace each such | |
1772 | instruction with the corresponding compare (or chkbit) and | |
1773 | branch instructions. Note that the Intel "j" cobr directives | |
1774 | are ALWAYS "de-optimized" in this way when necessary, | |
1775 | regardless of the setting of this option. | |
1776 | ||
1777 | -b: | |
1778 | Add code to collect information about branches taken, for | |
1779 | later optimization of branch prediction bits by a separate | |
1780 | tool. COBR and CNTL format instructions have branch | |
1781 | prediction bits (in the CX architecture); if "BR" represents | |
1782 | an instruction in one of these classes, the following rep- | |
1783 | resents the code generated by the assembler: | |
1784 | ||
1785 | call <increment routine> | |
1786 | .word 0 # pre-counter | |
1787 | Label: BR | |
1788 | call <increment routine> | |
1789 | .word 0 # post-counter | |
1790 | ||
1791 | A table of all such "Labels" is also generated. | |
1792 | ||
1793 | -AKA, -AKB, -AKC, -ASA, -ASB, -AMC, -ACA: | |
1794 | Select the 80960 architecture. Instructions or features not | |
1795 | supported by the selected architecture cause fatal errors. | |
1796 | The default is to generate code for any instruction or feature | |
1797 | that is supported by SOME version of the 960 (even if this | |
1798 | means mixing architectures!). */ | |
1799 | ||
1800 | const char *md_shortopts = "A:b"; | |
1801 | struct option md_longopts[] = | |
1802 | { | |
1803 | #define OPTION_LINKRELAX (OPTION_MD_BASE) | |
1804 | {"linkrelax", no_argument, NULL, OPTION_LINKRELAX}, | |
1805 | {"link-relax", no_argument, NULL, OPTION_LINKRELAX}, | |
1806 | #define OPTION_NORELAX (OPTION_MD_BASE + 1) | |
1807 | {"norelax", no_argument, NULL, OPTION_NORELAX}, | |
1808 | {"no-relax", no_argument, NULL, OPTION_NORELAX}, | |
1809 | {NULL, no_argument, NULL, 0} | |
1810 | }; | |
1811 | size_t md_longopts_size = sizeof (md_longopts); | |
1812 | ||
1813 | struct tabentry | |
1814 | { | |
1815 | char *flag; | |
1816 | int arch; | |
1817 | }; | |
1818 | static const struct tabentry arch_tab[] = | |
1819 | { | |
1820 | {"KA", ARCH_KA}, | |
1821 | {"KB", ARCH_KB}, | |
1822 | {"SA", ARCH_KA}, /* Synonym for KA. */ | |
1823 | {"SB", ARCH_KB}, /* Synonym for KB. */ | |
1824 | {"KC", ARCH_MC}, /* Synonym for MC. */ | |
1825 | {"MC", ARCH_MC}, | |
1826 | {"CA", ARCH_CA}, | |
1827 | {"JX", ARCH_JX}, | |
1828 | {"HX", ARCH_HX}, | |
1829 | {NULL, 0} | |
1830 | }; | |
1831 | ||
1832 | int | |
1833 | md_parse_option (int c, char *arg) | |
1834 | { | |
1835 | switch (c) | |
252b5132 | 1836 | { |
ea1562b3 NC |
1837 | case OPTION_LINKRELAX: |
1838 | linkrelax = 1; | |
1839 | flag_keep_locals = 1; | |
1840 | break; | |
1841 | ||
1842 | case OPTION_NORELAX: | |
1843 | norelax = 1; | |
1844 | break; | |
1845 | ||
1846 | case 'b': | |
1847 | instrument_branches = 1; | |
1848 | break; | |
1849 | ||
1850 | case 'A': | |
1851 | { | |
1852 | const struct tabentry *tp; | |
1853 | char *p = arg; | |
1854 | ||
1855 | for (tp = arch_tab; tp->flag != NULL; tp++) | |
1856 | if (!strcmp (p, tp->flag)) | |
1857 | break; | |
1858 | ||
1859 | if (tp->flag == NULL) | |
1860 | { | |
1861 | as_bad (_("invalid architecture %s"), p); | |
1862 | return 0; | |
1863 | } | |
1864 | else | |
1865 | architecture = tp->arch; | |
1866 | } | |
1867 | break; | |
1868 | ||
1869 | default: | |
1870 | return 0; | |
252b5132 | 1871 | } |
ea1562b3 NC |
1872 | |
1873 | return 1; | |
252b5132 RH |
1874 | } |
1875 | ||
ea1562b3 NC |
1876 | void |
1877 | md_show_usage (FILE *stream) | |
1878 | { | |
1879 | int i; | |
252b5132 | 1880 | |
ea1562b3 NC |
1881 | fprintf (stream, _("I960 options:\n")); |
1882 | for (i = 0; arch_tab[i].flag; i++) | |
1883 | fprintf (stream, "%s-A%s", i ? " | " : "", arch_tab[i].flag); | |
1884 | fprintf (stream, _("\n\ | |
1885 | specify variant of 960 architecture\n\ | |
1886 | -b add code to collect statistics about branches taken\n\ | |
1887 | -link-relax preserve individual alignment directives so linker\n\ | |
1888 | can do relaxing (b.out format only)\n\ | |
1889 | -no-relax don't alter compare-and-branch instructions for\n\ | |
1890 | long displacements\n")); | |
1891 | } | |
1892 | \f | |
1893 | /* relax_cobr: | |
1894 | Replace cobr instruction in a code fragment with equivalent branch and | |
1895 | compare instructions, so it can reach beyond a 13-bit displacement. | |
1896 | Set up an address fix/relocation for the new branch instruction. */ | |
252b5132 RH |
1897 | |
1898 | /* This "conditional jump" table maps cobr instructions into | |
1899 | equivalent compare and branch opcodes. */ | |
ea1562b3 | 1900 | |
252b5132 RH |
1901 | static const |
1902 | struct | |
1903 | { | |
1904 | long compare; | |
1905 | long branch; | |
1906 | } | |
1907 | ||
1908 | coj[] = | |
1909 | { /* COBR OPCODE: */ | |
1910 | { CHKBIT, BNO }, /* 0x30 - bbc */ | |
1911 | { CMPO, BG }, /* 0x31 - cmpobg */ | |
1912 | { CMPO, BE }, /* 0x32 - cmpobe */ | |
1913 | { CMPO, BGE }, /* 0x33 - cmpobge */ | |
1914 | { CMPO, BL }, /* 0x34 - cmpobl */ | |
1915 | { CMPO, BNE }, /* 0x35 - cmpobne */ | |
1916 | { CMPO, BLE }, /* 0x36 - cmpoble */ | |
1917 | { CHKBIT, BO }, /* 0x37 - bbs */ | |
1918 | { CMPI, BNO }, /* 0x38 - cmpibno */ | |
1919 | { CMPI, BG }, /* 0x39 - cmpibg */ | |
1920 | { CMPI, BE }, /* 0x3a - cmpibe */ | |
1921 | { CMPI, BGE }, /* 0x3b - cmpibge */ | |
1922 | { CMPI, BL }, /* 0x3c - cmpibl */ | |
1923 | { CMPI, BNE }, /* 0x3d - cmpibne */ | |
1924 | { CMPI, BLE }, /* 0x3e - cmpible */ | |
1925 | { CMPI, BO }, /* 0x3f - cmpibo */ | |
1926 | }; | |
1927 | ||
b9195351 | 1928 | static void |
ea1562b3 NC |
1929 | relax_cobr (fragS *fragP) /* fragP->fr_opcode is assumed to point to |
1930 | the cobr instruction, which comes at the | |
1931 | end of the code fragment. */ | |
252b5132 RH |
1932 | { |
1933 | int opcode, src1, src2, m1, s2; | |
ea1562b3 NC |
1934 | /* Bit fields from cobr instruction. */ |
1935 | long bp_bits; /* Branch prediction bits from cobr instruction. */ | |
1936 | long instr; /* A single i960 instruction. */ | |
1937 | /* ->instruction to be replaced. */ | |
252b5132 | 1938 | char *iP; |
ea1562b3 | 1939 | fixS *fixP; /* Relocation that can be done at assembly time. */ |
252b5132 | 1940 | |
ea1562b3 | 1941 | /* Pick up & parse cobr instruction. */ |
252b5132 RH |
1942 | iP = fragP->fr_opcode; |
1943 | instr = md_chars_to_number (iP, 4); | |
ea1562b3 | 1944 | opcode = ((instr >> 24) & 0xff) - 0x30; /* "-0x30" for table index. */ |
252b5132 RH |
1945 | src1 = (instr >> 19) & 0x1f; |
1946 | m1 = (instr >> 13) & 1; | |
1947 | s2 = instr & 1; | |
1948 | src2 = (instr >> 14) & 0x1f; | |
1949 | bp_bits = instr & BP_MASK; | |
1950 | ||
ea1562b3 | 1951 | /* Generate and output compare instruction. */ |
252b5132 RH |
1952 | instr = coj[opcode].compare |
1953 | | src1 | (m1 << 11) | (s2 << 6) | (src2 << 14); | |
1954 | md_number_to_chars (iP, instr, 4); | |
1955 | ||
ea1562b3 | 1956 | /* Output branch instruction. */ |
252b5132 RH |
1957 | md_number_to_chars (iP + 4, coj[opcode].branch | bp_bits, 4); |
1958 | ||
ea1562b3 | 1959 | /* Set up address fixup/relocation. */ |
252b5132 RH |
1960 | fixP = fix_new (fragP, |
1961 | iP + 4 - fragP->fr_literal, | |
1962 | 4, | |
1963 | fragP->fr_symbol, | |
1964 | fragP->fr_offset, | |
1965 | 1, | |
1966 | NO_RELOC); | |
1967 | ||
ea1562b3 NC |
1968 | fixP->fx_bit_fixP = (bit_fixS *) 24; /* Store size of bit field. */ |
1969 | ||
1970 | fragP->fr_fix += 4; | |
1971 | frag_wane (fragP); | |
1972 | } | |
1973 | ||
1974 | /* md_convert_frag: | |
1975 | ||
1976 | Called by base assembler after address relaxation is finished: modify | |
1977 | variable fragments according to how much relaxation was done. | |
1978 | ||
1979 | If the fragment substate is still 1, a 13-bit displacement was enough | |
1980 | to reach the symbol in question. Set up an address fixup, but otherwise | |
1981 | leave the cobr instruction alone. | |
1982 | ||
1983 | If the fragment substate is 2, a 13-bit displacement was not enough. | |
1984 | Replace the cobr with a two instructions (a compare and a branch). */ | |
1985 | ||
ea1562b3 NC |
1986 | void |
1987 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, | |
1988 | segT sec ATTRIBUTE_UNUSED, | |
1989 | fragS *fragP) | |
ea1562b3 NC |
1990 | { |
1991 | /* Structure describing needed address fix. */ | |
1992 | fixS *fixP; | |
1993 | ||
1994 | switch (fragP->fr_subtype) | |
1995 | { | |
1996 | case 1: | |
1997 | /* Leave single cobr instruction. */ | |
1998 | fixP = fix_new (fragP, | |
1999 | fragP->fr_opcode - fragP->fr_literal, | |
2000 | 4, | |
2001 | fragP->fr_symbol, | |
2002 | fragP->fr_offset, | |
2003 | 1, | |
2004 | NO_RELOC); | |
2005 | ||
2006 | fixP->fx_bit_fixP = (bit_fixS *) 13; /* Size of bit field. */ | |
2007 | break; | |
2008 | case 2: | |
2009 | /* Replace cobr with compare/branch instructions. */ | |
2010 | relax_cobr (fragP); | |
2011 | break; | |
2012 | default: | |
2013 | BAD_CASE (fragP->fr_subtype); | |
2014 | break; | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | /* md_estimate_size_before_relax: How much does it look like *fragP will grow? | |
2019 | ||
2020 | Called by base assembler just before address relaxation. | |
2021 | Return the amount by which the fragment will grow. | |
2022 | ||
2023 | Any symbol that is now undefined will not become defined; cobr's | |
2024 | based on undefined symbols will have to be replaced with a compare | |
2025 | instruction and a branch instruction, and the code fragment will grow | |
2026 | by 4 bytes. */ | |
2027 | ||
2028 | int | |
2029 | md_estimate_size_before_relax (fragS *fragP, segT segment_type) | |
2030 | { | |
2031 | /* If symbol is undefined in this segment, go to "relaxed" state | |
2032 | (compare and branch instructions instead of cobr) right now. */ | |
2033 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment_type) | |
2034 | { | |
2035 | relax_cobr (fragP); | |
2036 | return 4; | |
2037 | } | |
2038 | ||
2039 | return md_relax_table[fragP->fr_subtype].rlx_length; | |
2040 | } | |
2041 | ||
2042 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
2043 | ||
2044 | /* md_ri_to_chars: | |
2045 | This routine exists in order to overcome machine byte-order problems | |
2046 | when dealing with bit-field entries in the relocation_info struct. | |
252b5132 | 2047 | |
ea1562b3 NC |
2048 | But relocation info will be used on the host machine only (only |
2049 | executable code is actually downloaded to the i80960). Therefore, | |
2050 | we leave it in host byte order. */ | |
2051 | ||
2052 | static void | |
2053 | md_ri_to_chars (char *where, struct relocation_info *ri) | |
2054 | { | |
2055 | host_number_to_chars (where, ri->r_address, 4); | |
2056 | host_number_to_chars (where + 4, ri->r_index, 3); | |
2057 | #if WORDS_BIGENDIAN | |
2058 | where[7] = (ri->r_pcrel << 7 | |
2059 | | ri->r_length << 5 | |
2060 | | ri->r_extern << 4 | |
2061 | | ri->r_bsr << 3 | |
2062 | | ri->r_disp << 2 | |
2063 | | ri->r_callj << 1 | |
2064 | | ri->nuthin << 0); | |
2065 | #else | |
2066 | where[7] = (ri->r_pcrel << 0 | |
2067 | | ri->r_length << 1 | |
2068 | | ri->r_extern << 3 | |
2069 | | ri->r_bsr << 4 | |
2070 | | ri->r_disp << 5 | |
2071 | | ri->r_callj << 6 | |
2072 | | ri->nuthin << 7); | |
2073 | #endif | |
252b5132 RH |
2074 | } |
2075 | ||
ea1562b3 | 2076 | #endif /* defined(OBJ_AOUT) | defined(OBJ_BOUT) */ |
252b5132 | 2077 | |
ea1562b3 NC |
2078 | \f |
2079 | /* brtab_emit: generate the fetch-prediction branch table. | |
252b5132 | 2080 | |
ea1562b3 NC |
2081 | See the comments above the declaration of 'br_cnt' for details on |
2082 | branch-prediction instrumentation. | |
252b5132 | 2083 | |
ea1562b3 NC |
2084 | The code emitted here would be functionally equivalent to the following |
2085 | example assembler source. | |
252b5132 | 2086 | |
ea1562b3 NC |
2087 | .data |
2088 | .align 2 | |
2089 | BR_TAB_NAME: | |
2090 | .word 0 # link to next table | |
2091 | .word 3 # length of table | |
2092 | .word LBRANCH0 # 1st entry in table proper | |
2093 | .word LBRANCH1 | |
2094 | .word LBRANCH2 */ | |
252b5132 | 2095 | |
ea1562b3 NC |
2096 | void |
2097 | brtab_emit (void) | |
252b5132 | 2098 | { |
ea1562b3 NC |
2099 | int i; |
2100 | char buf[20]; | |
2101 | /* Where the binary was output to. */ | |
2102 | char *p; | |
2103 | /* Pointer to description of deferred address fixup. */ | |
2104 | fixS *fixP; | |
252b5132 | 2105 | |
ea1562b3 NC |
2106 | if (!instrument_branches) |
2107 | return; | |
252b5132 | 2108 | |
ea1562b3 NC |
2109 | subseg_set (data_section, 0); /* .data */ |
2110 | frag_align (2, 0, 0); /* .align 2 */ | |
2111 | record_alignment (now_seg, 2); | |
2112 | colon (BR_TAB_NAME); /* BR_TAB_NAME: */ | |
2113 | emit (0); /* .word 0 #link to next table */ | |
2114 | emit (br_cnt); /* .word n #length of table */ | |
252b5132 | 2115 | |
ea1562b3 | 2116 | for (i = 0; i < br_cnt; i++) |
252b5132 | 2117 | { |
ea1562b3 NC |
2118 | sprintf (buf, "%s%d", BR_LABEL_BASE, i); |
2119 | p = emit (0); | |
2120 | fixP = fix_new (frag_now, | |
2121 | p - frag_now->fr_literal, | |
2122 | 4, symbol_find (buf), 0, 0, NO_RELOC); | |
252b5132 | 2123 | } |
252b5132 RH |
2124 | } |
2125 | ||
ea1562b3 | 2126 | /* s_leafproc: process .leafproc pseudo-op |
252b5132 RH |
2127 | |
2128 | .leafproc takes two arguments, the second one is optional: | |
2129 | arg[1]: name of 'call' entry point to leaf procedure | |
2130 | arg[2]: name of 'bal' entry point to leaf procedure | |
2131 | ||
2132 | If the two arguments are identical, or if the second one is missing, | |
2133 | the first argument is taken to be the 'bal' entry point. | |
2134 | ||
2135 | If there are 2 distinct arguments, we must make sure that the 'bal' | |
2136 | entry point immediately follows the 'call' entry point in the linked | |
ea1562b3 | 2137 | list of symbols. */ |
252b5132 | 2138 | |
252b5132 | 2139 | static void |
ea1562b3 NC |
2140 | s_leafproc (int n_ops, /* Number of operands. */ |
2141 | char *args[]) /* args[1]->1st operand, args[2]->2nd operand. */ | |
252b5132 | 2142 | { |
ea1562b3 NC |
2143 | symbolS *callP; /* Pointer to leafproc 'call' entry point symbol. */ |
2144 | symbolS *balP; /* Pointer to leafproc 'bal' entry point symbol. */ | |
252b5132 RH |
2145 | |
2146 | if ((n_ops != 1) && (n_ops != 2)) | |
2147 | { | |
2148 | as_bad (_("should have 1 or 2 operands")); | |
2149 | return; | |
ea1562b3 | 2150 | } |
252b5132 | 2151 | |
92774660 | 2152 | /* Find or create symbol for 'call' entry point. */ |
252b5132 RH |
2153 | callP = symbol_find_or_make (args[1]); |
2154 | ||
2155 | if (TC_S_IS_CALLNAME (callP)) | |
ea1562b3 | 2156 | as_warn (_("Redefining leafproc %s"), S_GET_NAME (callP)); |
252b5132 RH |
2157 | |
2158 | /* If that was the only argument, use it as the 'bal' entry point. | |
ea1562b3 NC |
2159 | Otherwise, mark it as the 'call' entry point and find or create |
2160 | another symbol for the 'bal' entry point. */ | |
252b5132 RH |
2161 | if ((n_ops == 1) || !strcmp (args[1], args[2])) |
2162 | { | |
2163 | TC_S_FORCE_TO_BALNAME (callP); | |
252b5132 RH |
2164 | } |
2165 | else | |
2166 | { | |
2167 | TC_S_FORCE_TO_CALLNAME (callP); | |
2168 | ||
2169 | balP = symbol_find_or_make (args[2]); | |
2170 | if (TC_S_IS_CALLNAME (balP)) | |
ea1562b3 NC |
2171 | as_warn (_("Redefining leafproc %s"), S_GET_NAME (balP)); |
2172 | ||
252b5132 RH |
2173 | TC_S_FORCE_TO_BALNAME (balP); |
2174 | ||
76171f81 | 2175 | #ifndef OBJ_ELF |
252b5132 | 2176 | tc_set_bal_of_call (callP, balP); |
76171f81 | 2177 | #endif |
ea1562b3 | 2178 | } |
252b5132 RH |
2179 | } |
2180 | ||
ea1562b3 | 2181 | /* s_sysproc: process .sysproc pseudo-op |
252b5132 | 2182 | |
ea1562b3 NC |
2183 | .sysproc takes two arguments: |
2184 | arg[1]: name of entry point to system procedure | |
2185 | arg[2]: 'entry_num' (index) of system procedure in the range | |
2186 | [0,31] inclusive. | |
2187 | ||
2188 | For [ab].out, we store the 'entrynum' in the 'n_other' field of | |
2189 | the symbol. Since that entry is normally 0, we bias 'entrynum' | |
2190 | by adding 1 to it. It must be unbiased before it is used. */ | |
252b5132 | 2191 | |
252b5132 | 2192 | static void |
ea1562b3 NC |
2193 | s_sysproc (int n_ops, /* Number of operands. */ |
2194 | char *args[]) /* args[1]->1st operand, args[2]->2nd operand. */ | |
252b5132 RH |
2195 | { |
2196 | expressionS exp; | |
2197 | symbolS *symP; | |
2198 | ||
2199 | if (n_ops != 2) | |
2200 | { | |
2201 | as_bad (_("should have two operands")); | |
2202 | return; | |
ea1562b3 | 2203 | } |
252b5132 | 2204 | |
92774660 | 2205 | /* Parse "entry_num" argument and check it for validity. */ |
252b5132 RH |
2206 | parse_expr (args[2], &exp); |
2207 | if (exp.X_op != O_constant | |
2208 | || (offs (exp) < 0) | |
2209 | || (offs (exp) > 31)) | |
2210 | { | |
2211 | as_bad (_("'entry_num' must be absolute number in [0,31]")); | |
2212 | return; | |
2213 | } | |
2214 | ||
ea1562b3 | 2215 | /* Find/make symbol and stick entry number (biased by +1) into it. */ |
252b5132 RH |
2216 | symP = symbol_find_or_make (args[1]); |
2217 | ||
2218 | if (TC_S_IS_SYSPROC (symP)) | |
ea1562b3 | 2219 | as_warn (_("Redefining entrynum for sysproc %s"), S_GET_NAME (symP)); |
252b5132 | 2220 | |
ea1562b3 | 2221 | TC_S_SET_SYSPROC (symP, offs (exp)); /* Encode entry number. */ |
252b5132 RH |
2222 | TC_S_FORCE_TO_SYSPROC (symP); |
2223 | } | |
2224 | ||
ea1562b3 | 2225 | /* parse_po: parse machine-dependent pseudo-op |
252b5132 | 2226 | |
ea1562b3 NC |
2227 | This is a top-level routine for machine-dependent pseudo-ops. It slurps |
2228 | up the rest of the input line, breaks out the individual arguments, | |
2229 | and dispatches them to the correct handler. */ | |
252b5132 | 2230 | |
ea1562b3 NC |
2231 | static void |
2232 | parse_po (int po_num) /* Pseudo-op number: currently S_LEAFPROC or S_SYSPROC. */ | |
252b5132 | 2233 | { |
ea1562b3 NC |
2234 | /* Pointers operands, with no embedded whitespace. |
2235 | arg[0] unused, arg[1-3]->operands. */ | |
2236 | char *args[4]; | |
2237 | int n_ops; /* Number of operands. */ | |
2238 | char *p; /* Pointer to beginning of unparsed argument string. */ | |
2239 | char eol; /* Character that indicated end of line. */ | |
252b5132 | 2240 | |
ea1562b3 | 2241 | extern char is_end_of_line[]; |
252b5132 | 2242 | |
ea1562b3 NC |
2243 | /* Advance input pointer to end of line. */ |
2244 | p = input_line_pointer; | |
2245 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
2246 | input_line_pointer++; | |
252b5132 | 2247 | |
ea1562b3 NC |
2248 | eol = *input_line_pointer; /* Save end-of-line char. */ |
2249 | *input_line_pointer = '\0'; /* Terminate argument list. */ | |
2250 | ||
2251 | /* Parse out operands. */ | |
2252 | n_ops = get_args (p, args); | |
2253 | if (n_ops == -1) | |
2254 | return; | |
2255 | ||
2256 | /* Dispatch to correct handler. */ | |
2257 | switch (po_num) | |
252b5132 | 2258 | { |
ea1562b3 NC |
2259 | case S_SYSPROC: |
2260 | s_sysproc (n_ops, args); | |
2261 | break; | |
2262 | case S_LEAFPROC: | |
2263 | s_leafproc (n_ops, args); | |
2264 | break; | |
2265 | default: | |
2266 | BAD_CASE (po_num); | |
2267 | break; | |
252b5132 | 2268 | } |
ea1562b3 NC |
2269 | |
2270 | /* Restore eol, so line numbers get updated correctly. Base | |
2271 | assembler assumes we leave input pointer pointing at char | |
2272 | following the eol. */ | |
2273 | *input_line_pointer++ = eol; | |
252b5132 RH |
2274 | } |
2275 | ||
ea1562b3 | 2276 | /* reloc_callj: Relocate a 'callj' instruction |
252b5132 | 2277 | |
ea1562b3 NC |
2278 | This is a "non-(GNU)-standard" machine-dependent hook. The base |
2279 | assembler calls it when it decides it can relocate an address at | |
2280 | assembly time instead of emitting a relocation directive. | |
252b5132 | 2281 | |
ea1562b3 NC |
2282 | Check to see if the relocation involves a 'callj' instruction to a: |
2283 | sysproc: Replace the default 'call' instruction with a 'calls' | |
2284 | leafproc: Replace the default 'call' instruction with a 'bal'. | |
2285 | other proc: Do nothing. | |
252b5132 | 2286 | |
ea1562b3 | 2287 | See b.out.h for details on the 'n_other' field in a symbol structure. |
252b5132 | 2288 | |
ea1562b3 NC |
2289 | IMPORTANT!: |
2290 | Assumes the caller has already figured out, in the case of a leafproc, | |
2291 | to use the 'bal' entry point, and has substituted that symbol into the | |
2292 | passed fixup structure. */ | |
2293 | ||
2294 | int | |
2295 | reloc_callj (fixS *fixP) /* Relocation that can be done at assembly time. */ | |
252b5132 | 2296 | { |
ea1562b3 NC |
2297 | /* Points to the binary for the instruction being relocated. */ |
2298 | char *where; | |
252b5132 | 2299 | |
ea1562b3 NC |
2300 | if (!fixP->fx_tcbit) |
2301 | /* This wasn't a callj instruction in the first place. */ | |
2302 | return 0; | |
252b5132 | 2303 | |
ea1562b3 NC |
2304 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
2305 | ||
2306 | if (TC_S_IS_SYSPROC (fixP->fx_addsy)) | |
252b5132 | 2307 | { |
ea1562b3 NC |
2308 | /* Symbol is a .sysproc: replace 'call' with 'calls'. System |
2309 | procedure number is (other-1). */ | |
2310 | md_number_to_chars (where, CALLS | TC_S_GET_SYSPROC (fixP->fx_addsy), 4); | |
2311 | ||
2312 | /* Nothing else needs to be done for this instruction. Make | |
2313 | sure 'md_number_to_field()' will perform a no-op. */ | |
2314 | fixP->fx_bit_fixP = (bit_fixS *) 1; | |
2315 | } | |
2316 | else if (TC_S_IS_CALLNAME (fixP->fx_addsy)) | |
2317 | { | |
2318 | /* Should not happen: see block comment above. */ | |
2319 | as_fatal (_("Trying to 'bal' to %s"), S_GET_NAME (fixP->fx_addsy)); | |
2320 | } | |
2321 | else if (TC_S_IS_BALNAME (fixP->fx_addsy)) | |
2322 | { | |
2323 | /* Replace 'call' with 'bal'; both instructions have the same | |
2324 | format, so calling code should complete relocation as if | |
2325 | nothing happened here. */ | |
2326 | md_number_to_chars (where, BAL, 4); | |
252b5132 | 2327 | } |
ea1562b3 NC |
2328 | else if (TC_S_IS_BADPROC (fixP->fx_addsy)) |
2329 | as_bad (_("Looks like a proc, but can't tell what kind.\n")); | |
2330 | ||
2331 | /* Otherwise Symbol is neither a sysproc nor a leafproc. */ | |
2332 | return 0; | |
252b5132 RH |
2333 | } |
2334 | ||
2335 | /* Handle the MRI .endian pseudo-op. */ | |
2336 | ||
2337 | static void | |
ea1562b3 | 2338 | s_endian (int ignore ATTRIBUTE_UNUSED) |
252b5132 RH |
2339 | { |
2340 | char *name; | |
2341 | char c; | |
2342 | ||
2343 | name = input_line_pointer; | |
2344 | c = get_symbol_end (); | |
2345 | if (strcasecmp (name, "little") == 0) | |
2346 | ; | |
2347 | else if (strcasecmp (name, "big") == 0) | |
2348 | as_bad (_("big endian mode is not supported")); | |
2349 | else | |
2350 | as_warn (_("ignoring unrecognized .endian type `%s'"), name); | |
2351 | ||
2352 | *input_line_pointer = c; | |
2353 | ||
2354 | demand_empty_rest_of_line (); | |
2355 | } | |
2356 | ||
92774660 | 2357 | /* We have no need to default values of symbols. */ |
252b5132 | 2358 | |
252b5132 | 2359 | symbolS * |
ea1562b3 | 2360 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
252b5132 RH |
2361 | { |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | /* Exactly what point is a PC-relative offset relative TO? | |
2366 | On the i960, they're relative to the address of the instruction, | |
92774660 | 2367 | which we have set up as the address of the fixup too. */ |
252b5132 | 2368 | long |
ea1562b3 | 2369 | md_pcrel_from (fixS *fixP) |
252b5132 RH |
2370 | { |
2371 | return fixP->fx_where + fixP->fx_frag->fr_address; | |
2372 | } | |
2373 | ||
2374 | void | |
55cf6793 | 2375 | md_apply_fix (fixS *fixP, |
ea1562b3 NC |
2376 | valueT *valP, |
2377 | segT seg ATTRIBUTE_UNUSED) | |
252b5132 | 2378 | { |
a161fe53 | 2379 | long val = *valP; |
252b5132 RH |
2380 | char *place = fixP->fx_where + fixP->fx_frag->fr_literal; |
2381 | ||
2382 | if (!fixP->fx_bit_fixP) | |
2383 | { | |
b9195351 | 2384 | md_number_to_imm (place, val, fixP->fx_size); |
252b5132 | 2385 | } |
44f2f9d2 | 2386 | else if ((int) (size_t) fixP->fx_bit_fixP == 13 |
a161fe53 AM |
2387 | && fixP->fx_addsy != NULL |
2388 | && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section) | |
2389 | { | |
2390 | /* This is a COBR instruction. They have only a | |
2391 | 13-bit displacement and are only to be used | |
2392 | for local branches: flag as error, don't generate | |
2393 | relocation. */ | |
2394 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2395 | _("can't use COBR format with external label")); | |
2396 | fixP->fx_addsy = NULL; | |
2397 | } | |
252b5132 RH |
2398 | else |
2399 | md_number_to_field (place, val, fixP->fx_bit_fixP); | |
bedf545c | 2400 | |
a161fe53 | 2401 | if (fixP->fx_addsy == NULL) |
94f592af | 2402 | fixP->fx_done = 1; |
252b5132 RH |
2403 | } |
2404 | ||
2405 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
2406 | void | |
ea1562b3 NC |
2407 | tc_bout_fix_to_chars (char *where, |
2408 | fixS *fixP, | |
2409 | relax_addressT segment_address_in_file) | |
252b5132 RH |
2410 | { |
2411 | static const unsigned char nbytes_r_length[] = {42, 0, 1, 42, 2}; | |
2412 | struct relocation_info ri; | |
2413 | symbolS *symbolP; | |
2414 | ||
2415 | memset ((char *) &ri, '\0', sizeof (ri)); | |
2416 | symbolP = fixP->fx_addsy; | |
2417 | know (symbolP != 0 || fixP->fx_r_type != NO_RELOC); | |
2418 | ri.r_bsr = fixP->fx_bsr; /*SAC LD RELAX HACK */ | |
2419 | /* These two 'cuz of NS32K */ | |
2420 | ri.r_callj = fixP->fx_tcbit; | |
2421 | if (fixP->fx_bit_fixP) | |
2422 | ri.r_length = 2; | |
2423 | else | |
2424 | ri.r_length = nbytes_r_length[fixP->fx_size]; | |
2425 | ri.r_pcrel = fixP->fx_pcrel; | |
2426 | ri.r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file; | |
2427 | ||
2428 | if (fixP->fx_r_type != NO_RELOC) | |
2429 | { | |
2430 | switch (fixP->fx_r_type) | |
2431 | { | |
2432 | case rs_align: | |
2433 | ri.r_index = -2; | |
2434 | ri.r_pcrel = 1; | |
2435 | ri.r_length = fixP->fx_size - 1; | |
2436 | break; | |
2437 | case rs_org: | |
2438 | ri.r_index = -2; | |
2439 | ri.r_pcrel = 0; | |
2440 | break; | |
2441 | case rs_fill: | |
2442 | ri.r_index = -1; | |
2443 | break; | |
2444 | default: | |
2445 | abort (); | |
2446 | } | |
2447 | ri.r_extern = 0; | |
2448 | } | |
2449 | else if (linkrelax || !S_IS_DEFINED (symbolP) || fixP->fx_bsr) | |
2450 | { | |
2451 | ri.r_extern = 1; | |
2452 | ri.r_index = symbolP->sy_number; | |
2453 | } | |
2454 | else | |
2455 | { | |
2456 | ri.r_extern = 0; | |
2457 | ri.r_index = S_GET_TYPE (symbolP); | |
2458 | } | |
2459 | ||
92774660 | 2460 | /* Output the relocation information in machine-dependent form. */ |
252b5132 RH |
2461 | md_ri_to_chars (where, &ri); |
2462 | } | |
2463 | ||
2464 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
2465 | ||
252b5132 | 2466 | /* Align an address by rounding it up to the specified boundary. */ |
ea1562b3 | 2467 | |
252b5132 | 2468 | valueT |
ea1562b3 NC |
2469 | md_section_align (segT seg, |
2470 | valueT addr) /* Address to be rounded up. */ | |
252b5132 | 2471 | { |
bedf545c | 2472 | int align; |
ea1562b3 | 2473 | |
bedf545c | 2474 | align = bfd_get_section_alignment (stdoutput, seg); |
bedf545c ILT |
2475 | return (addr + (1 << align) - 1) & (-1 << align); |
2476 | } | |
252b5132 RH |
2477 | |
2478 | extern int coff_flags; | |
2479 | ||
252b5132 RH |
2480 | /* For aout or bout, the bal immediately follows the call. |
2481 | ||
2482 | For coff, we cheat and store a pointer to the bal symbol in the | |
2483 | second aux entry of the call. */ | |
2484 | ||
2485 | #undef OBJ_ABOUT | |
2486 | #ifdef OBJ_AOUT | |
2487 | #define OBJ_ABOUT | |
2488 | #endif | |
2489 | #ifdef OBJ_BOUT | |
2490 | #define OBJ_ABOUT | |
2491 | #endif | |
2492 | ||
2493 | void | |
ea1562b3 NC |
2494 | tc_set_bal_of_call (symbolS *callP ATTRIBUTE_UNUSED, |
2495 | symbolS *balP ATTRIBUTE_UNUSED) | |
252b5132 RH |
2496 | { |
2497 | know (TC_S_IS_CALLNAME (callP)); | |
2498 | know (TC_S_IS_BALNAME (balP)); | |
2499 | ||
2500 | #ifdef OBJ_COFF | |
2501 | ||
2502 | callP->sy_tc = balP; | |
2503 | S_SET_NUMBER_AUXILIARY (callP, 2); | |
2504 | ||
2505 | #else /* ! OBJ_COFF */ | |
2506 | #ifdef OBJ_ABOUT | |
2507 | ||
2508 | /* If the 'bal' entry doesn't immediately follow the 'call' | |
ea1562b3 | 2509 | symbol, unlink it from the symbol list and re-insert it. */ |
252b5132 RH |
2510 | if (symbol_next (callP) != balP) |
2511 | { | |
2512 | symbol_remove (balP, &symbol_rootP, &symbol_lastP); | |
2513 | symbol_append (balP, callP, &symbol_rootP, &symbol_lastP); | |
2514 | } /* if not in order */ | |
2515 | ||
2516 | #else /* ! OBJ_ABOUT */ | |
bedf545c | 2517 | as_fatal ("Only supported for a.out, b.out, or COFF"); |
252b5132 RH |
2518 | #endif /* ! OBJ_ABOUT */ |
2519 | #endif /* ! OBJ_COFF */ | |
2520 | } | |
2521 | ||
2522 | symbolS * | |
ea1562b3 | 2523 | tc_get_bal_of_call (symbolS *callP ATTRIBUTE_UNUSED) |
252b5132 RH |
2524 | { |
2525 | symbolS *retval; | |
2526 | ||
2527 | know (TC_S_IS_CALLNAME (callP)); | |
2528 | ||
2529 | #ifdef OBJ_COFF | |
2530 | retval = callP->sy_tc; | |
2531 | #else | |
2532 | #ifdef OBJ_ABOUT | |
2533 | retval = symbol_next (callP); | |
2534 | #else | |
bedf545c | 2535 | as_fatal ("Only supported for a.out, b.out, or COFF"); |
252b5132 RH |
2536 | #endif /* ! OBJ_ABOUT */ |
2537 | #endif /* ! OBJ_COFF */ | |
2538 | ||
2539 | know (TC_S_IS_BALNAME (retval)); | |
2540 | return retval; | |
ea1562b3 | 2541 | } |
252b5132 | 2542 | |
b9195351 | 2543 | #ifdef OBJ_COFF |
252b5132 | 2544 | void |
ea1562b3 | 2545 | tc_coff_symbol_emit_hook (symbolS *symbolP ATTRIBUTE_UNUSED) |
252b5132 RH |
2546 | { |
2547 | if (TC_S_IS_CALLNAME (symbolP)) | |
2548 | { | |
252b5132 RH |
2549 | symbolS *balP = tc_get_bal_of_call (symbolP); |
2550 | ||
252b5132 RH |
2551 | symbolP->sy_symbol.ost_auxent[1].x_bal.x_balntry = S_GET_VALUE (balP); |
2552 | if (S_GET_STORAGE_CLASS (symbolP) == C_EXT) | |
2553 | S_SET_STORAGE_CLASS (symbolP, C_LEAFEXT); | |
2554 | else | |
2555 | S_SET_STORAGE_CLASS (symbolP, C_LEAFSTAT); | |
2556 | S_SET_DATA_TYPE (symbolP, S_GET_DATA_TYPE (symbolP) | (DT_FCN << N_BTSHFT)); | |
ea1562b3 | 2557 | /* Fix up the bal symbol. */ |
252b5132 | 2558 | S_SET_STORAGE_CLASS (balP, C_LABEL); |
ea1562b3 | 2559 | } |
252b5132 | 2560 | } |
b9195351 | 2561 | #endif /* OBJ_COFF */ |
252b5132 RH |
2562 | |
2563 | void | |
ea1562b3 | 2564 | i960_handle_align (fragS *fragp ATTRIBUTE_UNUSED) |
252b5132 RH |
2565 | { |
2566 | if (!linkrelax) | |
2567 | return; | |
2568 | ||
2569 | #ifndef OBJ_BOUT | |
252b5132 RH |
2570 | as_bad (_("option --link-relax is only supported in b.out format")); |
2571 | linkrelax = 0; | |
2572 | return; | |
252b5132 RH |
2573 | #else |
2574 | ||
2575 | /* The text section "ends" with another alignment reloc, to which we | |
2576 | aren't adding padding. */ | |
2577 | if (fragp->fr_next == text_last_frag | |
2578 | || fragp->fr_next == data_last_frag) | |
2579 | return; | |
2580 | ||
2581 | /* alignment directive */ | |
2582 | fix_new (fragp, fragp->fr_fix, fragp->fr_offset, 0, 0, 0, | |
2583 | (int) fragp->fr_type); | |
2584 | #endif /* OBJ_BOUT */ | |
2585 | } | |
2586 | ||
2587 | int | |
ea1562b3 | 2588 | i960_validate_fix (fixS *fixP, segT this_segment_type ATTRIBUTE_UNUSED) |
252b5132 | 2589 | { |
a161fe53 | 2590 | if (fixP->fx_tcbit && TC_S_IS_CALLNAME (fixP->fx_addsy)) |
252b5132 RH |
2591 | { |
2592 | /* Relocation should be done via the associated 'bal' | |
92774660 | 2593 | entry point symbol. */ |
a161fe53 | 2594 | if (!TC_S_IS_BALNAME (tc_get_bal_of_call (fixP->fx_addsy))) |
252b5132 | 2595 | { |
a161fe53 AM |
2596 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2597 | _("No 'bal' entry point for leafproc %s"), | |
2598 | S_GET_NAME (fixP->fx_addsy)); | |
2599 | return 0; | |
252b5132 | 2600 | } |
a161fe53 | 2601 | fixP->fx_addsy = tc_get_bal_of_call (fixP->fx_addsy); |
252b5132 | 2602 | } |
a161fe53 AM |
2603 | |
2604 | return 1; | |
252b5132 RH |
2605 | } |
2606 | ||
bedf545c ILT |
2607 | /* From cgen.c: */ |
2608 | ||
2609 | static short | |
ea1562b3 | 2610 | tc_bfd_fix2rtype (fixS *fixP) |
bedf545c | 2611 | { |
bedf545c ILT |
2612 | if (fixP->fx_pcrel == 0 && fixP->fx_size == 4) |
2613 | return BFD_RELOC_32; | |
2614 | ||
2615 | if (fixP->fx_pcrel != 0 && fixP->fx_size == 4) | |
2616 | return BFD_RELOC_24_PCREL; | |
2617 | ||
2618 | abort (); | |
2619 | return 0; | |
2620 | } | |
2621 | ||
2622 | /* Translate internal representation of relocation info to BFD target | |
2623 | format. | |
2624 | ||
2625 | FIXME: To what extent can we get all relevant targets to use this? */ | |
2626 | ||
2627 | arelent * | |
ea1562b3 | 2628 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) |
bedf545c ILT |
2629 | { |
2630 | arelent * reloc; | |
2631 | ||
ea1562b3 | 2632 | reloc = xmalloc (sizeof (arelent)); |
bedf545c | 2633 | |
ea1562b3 | 2634 | /* HACK: Is this right? */ |
bedf545c ILT |
2635 | fixP->fx_r_type = tc_bfd_fix2rtype (fixP); |
2636 | ||
2637 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
ea1562b3 | 2638 | if (reloc->howto == NULL) |
bedf545c ILT |
2639 | { |
2640 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2641 | "internal error: can't export reloc type %d (`%s')", | |
2642 | fixP->fx_r_type, | |
2643 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
2644 | return NULL; | |
2645 | } | |
2646 | ||
9c2799c2 | 2647 | gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); |
bedf545c | 2648 | |
ea1562b3 | 2649 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
49309057 | 2650 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
bedf545c ILT |
2651 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; |
2652 | reloc->addend = fixP->fx_addnumber; | |
2653 | ||
2654 | return reloc; | |
2655 | } | |
2656 | ||
2657 | /* end from cgen.c */ | |
2658 | ||
ea1562b3 NC |
2659 | const pseudo_typeS md_pseudo_table[] = |
2660 | { | |
2661 | {"bss", s_lcomm, 1}, | |
2662 | {"endian", s_endian, 0}, | |
2663 | {"extended", float_cons, 't'}, | |
2664 | {"leafproc", parse_po, S_LEAFPROC}, | |
2665 | {"sysproc", parse_po, S_SYSPROC}, | |
2666 | ||
2667 | {"word", cons, 4}, | |
2668 | {"quad", cons, 16}, | |
2669 | ||
2670 | {0, 0, 0} | |
2671 | }; |