1 /* tc-avr.c -- Assembler code for the ATMEL AVR
3 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
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
10 the Free Software Foundation; either version 2, or (at your option)
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.
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
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #include "safe-ctype.h"
32 int insn_size; /* In words. */
34 unsigned int bin_opcode;
37 #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
38 {#NAME, CONSTR, SIZE, ISA, BIN},
40 struct avr_opcodes_s avr_opcodes[] =
42 #include "opcode/avr.h"
46 const char comment_chars[] = ";";
47 const char line_comment_chars[] = "#";
48 const char line_separator_chars[] = "$";
50 const char *md_shortopts = "m:";
58 /* XXX - devices that don't seem to exist (renamed, replaced with larger
59 ones, or planned but never produced), left here for compatibility.
60 TODO: hide them in show_mcu_list output? */
62 static struct mcu_type_s mcu_types[] =
64 {"avr1", AVR_ISA_TINY1, bfd_mach_avr1},
65 {"avr2", AVR_ISA_2xxx, bfd_mach_avr2},
66 {"avr3", AVR_ISA_M103, bfd_mach_avr3},
67 {"avr4", AVR_ISA_M8, bfd_mach_avr4},
68 {"avr5", AVR_ISA_ALL, bfd_mach_avr5},
69 {"at90s1200", AVR_ISA_1200, bfd_mach_avr1},
70 {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */
71 {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1},
72 {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1},
73 {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1},
74 {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1},
75 {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2},
76 {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2},
77 {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */
78 {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2},
79 {"attiny22", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 2343 */
80 {"attiny26", AVR_ISA_2xxx, bfd_mach_avr2},
81 {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2},
82 {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */
83 {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */
84 {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2},
85 {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2},
86 {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2},
87 {"at86rf401", AVR_ISA_2xxx, bfd_mach_avr2},
88 {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */
89 {"atmega103", AVR_ISA_M103, bfd_mach_avr3},
90 {"at43usb320",AVR_ISA_M103, bfd_mach_avr3},
91 {"at43usb355",AVR_ISA_M603, bfd_mach_avr3},
92 {"at76c711", AVR_ISA_M603, bfd_mach_avr3},
93 {"atmega8", AVR_ISA_M8, bfd_mach_avr4},
94 {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8535 */
95 {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */
96 {"atmega8515",AVR_ISA_M8, bfd_mach_avr4},
97 {"atmega8535",AVR_ISA_M8, bfd_mach_avr4},
98 {"atmega16", AVR_ISA_M323, bfd_mach_avr5},
99 {"atmega161", AVR_ISA_M161, bfd_mach_avr5},
100 {"atmega162", AVR_ISA_M323, bfd_mach_avr5},
101 {"atmega163", AVR_ISA_M161, bfd_mach_avr5},
102 {"atmega169", AVR_ISA_M323, bfd_mach_avr5},
103 {"atmega32", AVR_ISA_M323, bfd_mach_avr5},
104 {"atmega323", AVR_ISA_M323, bfd_mach_avr5},
105 {"atmega64", AVR_ISA_M323, bfd_mach_avr5},
106 {"atmega128", AVR_ISA_M128, bfd_mach_avr5},
107 {"at94k", AVR_ISA_94K, bfd_mach_avr5},
111 /* Current MCU type. */
112 static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2};
113 static struct mcu_type_s *avr_mcu = &default_mcu;
115 /* AVR target-specific switches. */
118 int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes */
119 int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns */
120 int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around */
123 static struct avr_opt_s avr_opt = { 0, 0, 0 };
125 const char EXP_CHARS[] = "eE";
126 const char FLT_CHARS[] = "dD";
127 static void avr_set_arch (int dummy);
129 /* The target specific pseudo-ops which we support. */
130 const pseudo_typeS md_pseudo_table[] =
132 {"arch", avr_set_arch, 0},
136 #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
138 static void show_mcu_list PARAMS ((FILE *));
139 static char *skip_space PARAMS ((char *));
140 static char *extract_word PARAMS ((char *, char *, int));
141 static unsigned int avr_operand PARAMS ((struct avr_opcodes_s *,
142 int, char *, char **));
143 static unsigned int avr_operands PARAMS ((struct avr_opcodes_s *, char **));
144 static unsigned int avr_get_constant PARAMS ((char *, int));
145 static char *parse_exp PARAMS ((char *, expressionS *));
146 static bfd_reloc_code_real_type avr_ldi_expression PARAMS ((expressionS *));
148 #define EXP_MOD_NAME(i) exp_mod[i].name
149 #define EXP_MOD_RELOC(i) exp_mod[i].reloc
150 #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc
151 #define HAVE_PM_P(i) exp_mod[i].have_pm
156 bfd_reloc_code_real_type reloc;
157 bfd_reloc_code_real_type neg_reloc;
161 static struct exp_mod_s exp_mod[] =
163 {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1},
164 {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0},
165 {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1},
166 {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0},
167 {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1},
168 {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0},
169 {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0},
170 {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0},
173 /* Opcode hash table. */
174 static struct hash_control *avr_hash;
176 /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
177 static struct hash_control *avr_mod_hash;
179 #define OPTION_MMCU 'm'
180 #define OPTION_ALL_OPCODES (OPTION_MD_BASE + 1)
181 #define OPTION_NO_SKIP_BUG (OPTION_MD_BASE + 2)
182 #define OPTION_NO_WRAP (OPTION_MD_BASE + 3)
184 struct option md_longopts[] =
186 { "mmcu", required_argument, NULL, OPTION_MMCU },
187 { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
188 { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
189 { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP },
190 { NULL, no_argument, NULL, 0 }
193 size_t md_longopts_size = sizeof (md_longopts);
195 /* Display nicely formatted list of known MCU names. */
198 show_mcu_list (stream)
203 fprintf (stream, _("Known MCU names:"));
206 for (i = 0; mcu_types[i].name; i++)
208 int len = strlen (mcu_types[i].name);
213 fprintf (stream, " %s", mcu_types[i].name);
216 fprintf (stream, "\n %s", mcu_types[i].name);
221 fprintf (stream, "\n");
228 while (*s == ' ' || *s == '\t')
233 /* Extract one word from FROM and copy it to TO. */
236 extract_word (char *from, char *to, int limit)
242 /* Drop leading whitespace. */
243 from = skip_space (from);
246 /* Find the op code end. */
247 for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
249 to[size++] = *op_end++;
250 if (size + 1 >= limit)
259 md_estimate_size_before_relax (fragp, seg)
260 fragS *fragp ATTRIBUTE_UNUSED;
261 asection *seg ATTRIBUTE_UNUSED;
268 md_show_usage (stream)
273 " -mmcu=[avr-name] select microcontroller variant\n"
274 " [avr-name] can be:\n"
275 " avr1 - AT90S1200, ATtiny1x, ATtiny28\n"
276 " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n"
277 " avr3 - ATmega103, ATmega603\n"
278 " avr4 - ATmega83, ATmega85\n"
279 " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n"
280 " or immediate microcontroller name.\n"));
282 _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n"
283 " -mno-skip-bug disable warnings for skipping two-word instructions\n"
284 " (default for avr4, avr5)\n"
285 " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n"
286 " (default for avr3, avr5)\n"));
287 show_mcu_list (stream);
292 int dummy ATTRIBUTE_UNUSED;
296 str = (char *) alloca (20);
297 input_line_pointer = extract_word (input_line_pointer, str, 20);
298 md_parse_option (OPTION_MMCU, str);
299 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
303 md_parse_option (c, arg)
312 char *s = alloca (strlen (arg) + 1);
319 *t = TOLOWER (*arg1++);
323 for (i = 0; mcu_types[i].name; ++i)
324 if (strcmp (mcu_types[i].name, s) == 0)
327 if (!mcu_types[i].name)
329 show_mcu_list (stderr);
330 as_fatal (_("unknown MCU: %s\n"), arg);
333 /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
334 type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
335 as .arch ... in the asm output at the same time. */
336 if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
337 avr_mcu = &mcu_types[i];
339 as_fatal (_("redefinition of mcu type `%s' to `%s'"),
340 avr_mcu->name, mcu_types[i].name);
343 case OPTION_ALL_OPCODES:
344 avr_opt.all_opcodes = 1;
346 case OPTION_NO_SKIP_BUG:
347 avr_opt.no_skip_bug = 1;
358 md_undefined_symbol (name)
359 char *name ATTRIBUTE_UNUSED;
364 /* Turn a string in input_line_pointer into a floating point constant
365 of type TYPE, and store the appropriate bytes in *LITP. The number
366 of LITTLENUMS emitted is stored in *SIZEP. An error message is
367 returned, or NULL on OK. */
370 md_atof (type, litP, sizeP)
376 LITTLENUM_TYPE words[4];
377 LITTLENUM_TYPE *wordP;
390 return _("bad call to md_atof");
393 t = atof_ieee (input_line_pointer, type, words);
395 input_line_pointer = t;
397 *sizeP = prec * sizeof (LITTLENUM_TYPE);
399 /* This loop outputs the LITTLENUMs in REVERSE order. */
400 for (wordP = words + prec - 1; prec--;)
402 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
403 litP += sizeof (LITTLENUM_TYPE);
410 md_convert_frag (abfd, sec, fragP)
411 bfd *abfd ATTRIBUTE_UNUSED;
412 asection *sec ATTRIBUTE_UNUSED;
413 fragS *fragP ATTRIBUTE_UNUSED;
422 struct avr_opcodes_s *opcode;
423 avr_hash = hash_new ();
425 /* Insert unique names into hash table. This hash table then provides a
426 quick index to the first opcode with a particular name in the opcode
428 for (opcode = avr_opcodes; opcode->name; opcode++)
429 hash_insert (avr_hash, opcode->name, (char *) opcode);
431 avr_mod_hash = hash_new ();
433 for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i)
434 hash_insert (avr_mod_hash, EXP_MOD_NAME (i), (void *) (i + 10));
436 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
439 /* Resolve STR as a constant expression and return the result.
440 If result greater than MAX then error. */
443 avr_get_constant (str, max)
448 str = skip_space (str);
449 input_line_pointer = str;
452 if (ex.X_op != O_constant)
453 as_bad (_("constant value required"));
455 if (ex.X_add_number > max || ex.X_add_number < 0)
456 as_bad (_("number must be less than %d"), max + 1);
458 return ex.X_add_number;
461 /* Parse instruction operands.
462 Return binary opcode. */
465 avr_operands (opcode, line)
466 struct avr_opcodes_s *opcode;
469 char *op = opcode->constraints;
470 unsigned int bin = opcode->bin_opcode;
471 char *frag = frag_more (opcode->insn_size * 2);
473 int where = frag - frag_now->fr_literal;
474 static unsigned int prev = 0; /* Previous opcode. */
476 /* Opcode have operands. */
479 unsigned int reg1 = 0;
480 unsigned int reg2 = 0;
481 int reg1_present = 0;
482 int reg2_present = 0;
484 /* Parse first operand. */
485 if (REGISTER_P (*op))
487 reg1 = avr_operand (opcode, where, op, &str);
490 /* Parse second operand. */
503 if (REGISTER_P (*op))
506 str = skip_space (str);
508 as_bad (_("`,' required"));
509 str = skip_space (str);
511 reg2 = avr_operand (opcode, where, op, &str);
515 if (reg1_present && reg2_present)
516 reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200);
517 else if (reg2_present)
525 /* Detect undefined combinations (like ld r31,Z+). */
526 if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin))
527 as_warn (_("undefined combination of operands"));
529 if (opcode->insn_size == 2)
531 /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
532 (AVR core bug, fixed in the newer devices). */
534 if (!(avr_opt.no_skip_bug || (avr_mcu->isa & AVR_ISA_MUL))
535 && AVR_SKIP_P (prev))
536 as_warn (_("skipping two-word instruction"));
538 bfd_putl32 ((bfd_vma) bin, frag);
541 bfd_putl16 ((bfd_vma) bin, frag);
548 /* Parse one instruction operand.
549 Return operand bitmask. Also fixups can be generated. */
552 avr_operand (opcode, where, op, line)
553 struct avr_opcodes_s *opcode;
559 unsigned int op_mask = 0;
560 char *str = skip_space (*line);
564 /* Any register operand. */
570 if (*str == 'r' || *str == 'R')
574 str = extract_word (str, r_name, sizeof (r_name));
576 if (ISDIGIT (r_name[1]))
578 if (r_name[2] == '\0')
579 op_mask = r_name[1] - '0';
580 else if (r_name[1] != '0'
581 && ISDIGIT (r_name[2])
582 && r_name[3] == '\0')
583 op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0';
588 op_mask = avr_get_constant (str, 31);
589 str = input_line_pointer;
597 if (op_mask < 16 || op_mask > 23)
598 as_bad (_("register r16-r23 required"));
604 as_bad (_("register number above 15 required"));
610 as_bad (_("even register number required"));
615 if ((op_mask & 1) || op_mask < 24)
616 as_bad (_("register r24, r26, r28 or r30 required"));
617 op_mask = (op_mask - 24) >> 1;
622 as_bad (_("register name or number from 0 to 31 required"));
631 str = skip_space (str + 1);
640 as_bad (_("pointer register (X, Y or Z) required"));
642 str = skip_space (str + 1);
647 as_bad (_("cannot both predecrement and postincrement"));
651 /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
652 registers, no predecrement, no postincrement. */
653 if (!avr_opt.all_opcodes && (op_mask & 0x100F)
654 && !(avr_mcu->isa & AVR_ISA_SRAM))
655 as_bad (_("addressing mode not supported"));
661 as_bad (_("can't predecrement"));
663 if (! (*str == 'z' || *str == 'Z'))
664 as_bad (_("pointer register Z required"));
666 str = skip_space (str + 1);
677 char c = TOLOWER (*str++);
682 as_bad (_("pointer register (Y or Z) required"));
683 str = skip_space (str);
687 x = avr_get_constant (str, 63);
688 str = input_line_pointer;
689 op_mask |= (x & 7) | ((x & (3 << 3)) << 7) | ((x & (1 << 5)) << 8);
695 str = parse_exp (str, &op_expr);
696 fix_new_exp (frag_now, where, opcode->insn_size * 2,
697 &op_expr, FALSE, BFD_RELOC_AVR_CALL);
701 str = parse_exp (str, &op_expr);
702 fix_new_exp (frag_now, where, opcode->insn_size * 2,
703 &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL);
707 str = parse_exp (str, &op_expr);
708 fix_new_exp (frag_now, where, opcode->insn_size * 2,
709 &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL);
713 str = parse_exp (str, &op_expr);
714 fix_new_exp (frag_now, where + 2, opcode->insn_size * 2,
715 &op_expr, FALSE, BFD_RELOC_16);
720 bfd_reloc_code_real_type r_type;
722 input_line_pointer = str;
723 r_type = avr_ldi_expression (&op_expr);
724 str = input_line_pointer;
725 fix_new_exp (frag_now, where, 3,
726 &op_expr, FALSE, r_type);
734 x = ~avr_get_constant (str, 255);
735 str = input_line_pointer;
736 op_mask |= (x & 0xf) | ((x << 4) & 0xf00);
744 x = avr_get_constant (str, 63);
745 str = input_line_pointer;
746 op_mask |= (x & 0xf) | ((x & 0x30) << 2);
755 x = avr_get_constant (str, 7);
756 str = input_line_pointer;
767 x = avr_get_constant (str, 63);
768 str = input_line_pointer;
769 op_mask |= (x & 0xf) | ((x & 0x30) << 5);
777 x = avr_get_constant (str, 31);
778 str = input_line_pointer;
787 as_bad (_("unknown constraint `%c'"), *op);
794 /* GAS will call this function for each section at the end of the assembly,
795 to permit the CPU backend to adjust the alignment of a section. */
798 md_section_align (seg, addr)
802 int align = bfd_get_section_alignment (stdoutput, seg);
803 return ((addr + (1 << align) - 1) & (-1 << align));
806 /* If you define this macro, it should return the offset between the
807 address of a PC relative fixup and the position from which the PC
808 relative adjustment should be made. On many processors, the base
809 of a PC relative instruction is the next instruction, so this
810 macro would return the length of an instruction. */
813 md_pcrel_from_section (fixp, sec)
817 if (fixp->fx_addsy != (symbolS *) NULL
818 && (!S_IS_DEFINED (fixp->fx_addsy)
819 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
822 return fixp->fx_frag->fr_address + fixp->fx_where;
825 /* GAS will call this for each fixup. It should store the correct
826 value in the object file. */
829 md_apply_fix3 (fixP, valP, seg)
834 unsigned char *where;
838 if (fixP->fx_addsy == (symbolS *) NULL)
841 else if (fixP->fx_pcrel)
843 segT s = S_GET_SEGMENT (fixP->fx_addsy);
845 if (s == seg || s == absolute_section)
847 value += S_GET_VALUE (fixP->fx_addsy);
852 /* We don't actually support subtracting a symbol. */
853 if (fixP->fx_subsy != (symbolS *) NULL)
854 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
856 switch (fixP->fx_r_type)
859 fixP->fx_no_overflow = 1;
861 case BFD_RELOC_AVR_7_PCREL:
862 case BFD_RELOC_AVR_13_PCREL:
865 case BFD_RELOC_AVR_CALL:
871 /* Fetch the instruction, insert the fully resolved operand
872 value, and stuff the instruction back again. */
873 where = fixP->fx_frag->fr_literal + fixP->fx_where;
874 insn = bfd_getl16 (where);
876 switch (fixP->fx_r_type)
878 case BFD_RELOC_AVR_7_PCREL:
880 as_bad_where (fixP->fx_file, fixP->fx_line,
881 _("odd address operand: %ld"), value);
883 /* Instruction addresses are always right-shifted by 1. */
885 --value; /* Correct PC. */
887 if (value < -64 || value > 63)
888 as_bad_where (fixP->fx_file, fixP->fx_line,
889 _("operand out of range: %ld"), value);
890 value = (value << 3) & 0x3f8;
891 bfd_putl16 ((bfd_vma) (value | insn), where);
894 case BFD_RELOC_AVR_13_PCREL:
896 as_bad_where (fixP->fx_file, fixP->fx_line,
897 _("odd address operand: %ld"), value);
899 /* Instruction addresses are always right-shifted by 1. */
901 --value; /* Correct PC. */
903 if (value < -2048 || value > 2047)
905 /* No wrap for devices with >8K of program memory. */
906 if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap)
907 as_bad_where (fixP->fx_file, fixP->fx_line,
908 _("operand out of range: %ld"), value);
912 bfd_putl16 ((bfd_vma) (value | insn), where);
916 bfd_putl16 ((bfd_vma) value, where);
920 bfd_putl16 ((bfd_vma) value, where);
923 case BFD_RELOC_AVR_16_PM:
924 bfd_putl16 ((bfd_vma) (value >> 1), where);
927 case BFD_RELOC_AVR_LO8_LDI:
928 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
931 case -BFD_RELOC_AVR_LO8_LDI:
932 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
935 case BFD_RELOC_AVR_HI8_LDI:
936 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where);
939 case -BFD_RELOC_AVR_HI8_LDI:
940 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where);
943 case BFD_RELOC_AVR_HH8_LDI:
944 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
947 case BFD_RELOC_AVR_LO8_LDI_NEG:
948 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where);
951 case -BFD_RELOC_AVR_LO8_LDI_NEG:
952 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
955 case BFD_RELOC_AVR_HI8_LDI_NEG:
956 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where);
959 case -BFD_RELOC_AVR_HI8_LDI_NEG:
960 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where);
963 case BFD_RELOC_AVR_HH8_LDI_NEG:
964 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
967 case BFD_RELOC_AVR_LO8_LDI_PM:
968 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where);
971 case BFD_RELOC_AVR_HI8_LDI_PM:
972 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where);
975 case BFD_RELOC_AVR_HH8_LDI_PM:
976 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where);
979 case BFD_RELOC_AVR_LO8_LDI_PM_NEG:
980 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where);
983 case BFD_RELOC_AVR_HI8_LDI_PM_NEG:
984 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where);
987 case BFD_RELOC_AVR_HH8_LDI_PM_NEG:
988 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where);
991 case BFD_RELOC_AVR_CALL:
995 x = bfd_getl16 (where);
997 as_bad_where (fixP->fx_file, fixP->fx_line,
998 _("odd address operand: %ld"), value);
1000 x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16;
1001 bfd_putl16 ((bfd_vma) x, where);
1002 bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
1007 as_fatal (_("line %d: unknown relocation type: 0x%x"),
1008 fixP->fx_line, fixP->fx_r_type);
1014 switch (fixP->fx_r_type)
1016 case -BFD_RELOC_AVR_HI8_LDI_NEG:
1017 case -BFD_RELOC_AVR_HI8_LDI:
1018 case -BFD_RELOC_AVR_LO8_LDI_NEG:
1019 case -BFD_RELOC_AVR_LO8_LDI:
1020 as_bad_where (fixP->fx_file, fixP->fx_line,
1021 _("only constant expression allowed"));
1030 /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS
1031 will pass the resulting reloc to `bfd_install_relocation'. This
1032 currently works poorly, as `bfd_install_relocation' often does the
1033 wrong thing, and instances of `tc_gen_reloc' have been written to
1034 work around the problems, which in turns makes it difficult to fix
1035 `bfd_install_relocation'. */
1037 /* If while processing a fixup, a reloc really needs to be created
1038 then it is done here. */
1041 tc_gen_reloc (seg, fixp)
1042 asection *seg ATTRIBUTE_UNUSED;
1047 reloc = (arelent *) xmalloc (sizeof (arelent));
1049 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
1050 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1052 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1053 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1054 if (reloc->howto == (reloc_howto_type *) NULL)
1056 as_bad_where (fixp->fx_file, fixp->fx_line,
1057 _("reloc %d not supported by object file format"),
1058 (int) fixp->fx_r_type);
1062 if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1063 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1064 reloc->address = fixp->fx_offset;
1066 reloc->addend = fixp->fx_offset;
1075 struct avr_opcodes_s *opcode;
1078 str = skip_space (extract_word (str, op, sizeof (op)));
1081 as_bad (_("can't find opcode "));
1083 opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
1087 as_bad (_("unknown opcode `%s'"), op);
1091 /* Special case for opcodes with optional operands (lpm, elpm) -
1092 version with operands exists in avr_opcodes[] in the next entry. */
1094 if (*str && *opcode->constraints == '?')
1097 if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa)
1098 as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
1100 /* We used to set input_line_pointer to the result of get_operands,
1101 but that is wrong. Our caller assumes we don't change it. */
1103 char *t = input_line_pointer;
1104 avr_operands (opcode, &str);
1105 if (*skip_space (str))
1106 as_bad (_("garbage at end of line"));
1107 input_line_pointer = t;
1111 /* Parse ordinary expression. */
1118 input_line_pointer = s;
1120 if (op->X_op == O_absent)
1121 as_bad (_("missing operand"));
1122 return input_line_pointer;
1125 /* Parse special expressions (needed for LDI command):
1130 where xx is: hh, hi, lo. */
1132 static bfd_reloc_code_real_type
1133 avr_ldi_expression (exp)
1136 char *str = input_line_pointer;
1142 str = extract_word (str, op, sizeof (op));
1146 mod = (int) hash_find (avr_mod_hash, op);
1153 str = skip_space (str);
1161 if (strncmp ("pm(", str, 3) == 0
1162 || strncmp ("-(pm(", str, 5) == 0)
1164 if (HAVE_PM_P (mod))
1170 as_bad (_("illegal expression"));
1182 if (*str == '-' && *(str + 1) == '(')
1189 input_line_pointer = str;
1194 if (*input_line_pointer != ')')
1196 as_bad (_("`)' required"));
1199 input_line_pointer++;
1203 return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod);
1208 input_line_pointer = tmp;
1211 /* Warn about expressions that fail to use lo8 (). */
1212 if (exp->X_op == O_constant)
1214 int x = exp->X_add_number;
1215 if (x < -255 || x > 255)
1216 as_warn (_("constant out of 8-bit range: %d"), x);
1219 as_warn (_("expression possibly out of 8-bit range"));
1221 return BFD_RELOC_AVR_LO8_LDI;
1224 /* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1225 `avr_cons_fix_new'. */
1226 static int exp_mod_pm = 0;
1228 /* Parse special CONS expression: pm (expression)
1229 which is used for addressing to a program memory.
1230 Relocation: BFD_RELOC_AVR_16_PM. */
1233 avr_parse_cons_expression (exp, nbytes)
1241 tmp = input_line_pointer = skip_space (input_line_pointer);
1245 char *pm_name = "pm";
1246 int len = strlen (pm_name);
1248 if (strncasecmp (input_line_pointer, pm_name, len) == 0)
1250 input_line_pointer = skip_space (input_line_pointer + len);
1252 if (*input_line_pointer == '(')
1254 input_line_pointer = skip_space (input_line_pointer + 1);
1258 if (*input_line_pointer == ')')
1259 ++input_line_pointer;
1262 as_bad (_("`)' required"));
1269 input_line_pointer = tmp;
1277 avr_cons_fix_new (frag, where, nbytes, exp)
1283 if (exp_mod_pm == 0)
1286 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16);
1287 else if (nbytes == 4)
1288 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32);
1290 as_bad (_("illegal %srelocation size: %d"), "", nbytes);
1295 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_AVR_16_PM);
1297 as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes);