1 /* tc-avr.c -- Assembler code for the ATMEL AVR
3 Copyright (C) 1999, 2000 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov <denisc@overta.ru>
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. */
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"
47 const char comment_chars[] = ";";
48 const char line_comment_chars[] = "#";
49 const char line_separator_chars[] = "$";
51 const char *md_shortopts = "m:";
59 static struct mcu_type_s mcu_types[] =
61 {"avr1", AVR_ISA_TINY1, bfd_mach_avr1},
62 {"avr2", AVR_ISA_85xx, bfd_mach_avr2},
63 {"avr3", AVR_ISA_M103, bfd_mach_avr3},
64 {"avr4", AVR_ISA_ALL, bfd_mach_avr4},
65 {"at90s1200", AVR_ISA_1200, bfd_mach_avr1},
66 {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1},
67 {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1},
68 {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1},
69 {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1},
70 {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1},
71 {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2},
72 {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2},
73 {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2},
74 {"attiny22" , AVR_ISA_2xxx, bfd_mach_avr2},
75 {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2},
76 {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2},
77 {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2},
78 {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2},
79 {"at90s8515", AVR_ISA_85xx, bfd_mach_avr2},
80 {"at90s8535", AVR_ISA_85xx, bfd_mach_avr2},
81 {"at90c8534", AVR_ISA_85xx, bfd_mach_avr2},
82 {"atmega603", AVR_ISA_M603, bfd_mach_avr3},
83 {"atmega103", AVR_ISA_M103, bfd_mach_avr3},
84 {"atmega161", AVR_ISA_M161, bfd_mach_avr4},
85 {"at94k10", AVR_ISA_94K, bfd_mach_avr4},
86 {"at94k20", AVR_ISA_94K, bfd_mach_avr4},
87 {"at94k40", AVR_ISA_94K, bfd_mach_avr4},
92 /* Current MCU type. */
93 static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2};
94 static struct mcu_type_s *avr_mcu = &default_mcu;
96 const char EXP_CHARS[] = "eE";
97 const char FLT_CHARS[] = "dD";
98 static void avr_set_arch (int dummy);
100 /* The target specific pseudo-ops which we support. */
101 const pseudo_typeS md_pseudo_table[] =
103 {"arch", avr_set_arch, 0},
107 #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
109 static char * skip_space (char * s);
110 static char * extract_word (char *from, char *to, int limit);
111 static unsigned int avr_operand (struct avr_opcodes_s *opcode,
112 int where, char *op, char **line);
113 static unsigned int avr_operands (struct avr_opcodes_s *opcode, char **line);
114 static unsigned int avr_get_constant (char * str, int max);
115 static char *parse_exp (char *s, expressionS * op);
116 static bfd_reloc_code_real_type avr_ldi_expression (expressionS *exp);
117 long md_pcrel_from_section PARAMS ((fixS *, segT));
120 #define EXP_MOD_NAME(i) exp_mod[i].name
121 #define EXP_MOD_RELOC(i) exp_mod[i].reloc
122 #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc
123 #define HAVE_PM_P(i) exp_mod[i].have_pm
128 bfd_reloc_code_real_type reloc;
129 bfd_reloc_code_real_type neg_reloc;
133 static struct exp_mod_s exp_mod[] = {
134 {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1},
135 {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0},
136 {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1},
137 {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0},
138 {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1},
139 {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0},
140 {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0},
141 {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0},
144 /* Opcode hash table. */
145 static struct hash_control *avr_hash;
147 /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
148 static struct hash_control *avr_mod_hash;
150 #define OPTION_MMCU (OPTION_MD_BASE + 1)
152 struct option md_longopts[] = {
153 {"mmcu", required_argument, NULL, 'm'},
154 {NULL, no_argument, NULL, 0}
156 size_t md_longopts_size = sizeof(md_longopts);
162 while (*s == ' ' || *s == '\t')
167 /* Extract one word from FROM and copy it to TO. */
169 extract_word (char *from, char *to, int limit)
175 /* Drop leading whitespace. */
176 from = skip_space (from);
178 /* Find the op code end. */
179 for (op_start = op_end = from; *op_end != 0 && is_part_of_name(*op_end); )
181 to[size++] = *op_end++;
182 if (size + 1 >= limit)
190 md_estimate_size_before_relax (fragp, seg)
191 fragS *fragp ATTRIBUTE_UNUSED;
192 asection *seg ATTRIBUTE_UNUSED;
199 md_show_usage (stream)
205 " -mmcu=[avr-name] select microcontroller variant\n"
206 " [avr-name] can be:\n"
207 " avr1 - AT90S1200\n"
208 " avr2 - AT90S2xxx, AT90S4xxx, AT90S85xx, ATtiny22\n"
209 " avr3 - ATmega103 or ATmega603\n"
210 " avr4 - ATmega161\n"
211 " or immediate microcontroller name.\n"));
216 int dummy ATTRIBUTE_UNUSED;
219 str = (char *)alloca (20);
220 input_line_pointer = extract_word (input_line_pointer, str, 20);
221 md_parse_option ('m', str);
222 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
226 md_parse_option (c, arg)
230 char *t = alloca (strlen (arg) + 1);
234 *t = tolower (*arg1++);
241 for (i = 0; mcu_types[i].name; ++i)
242 if (strcmp (mcu_types[i].name, s) == 0)
245 if (!mcu_types[i].name)
246 as_fatal (_ ("unknown MCU: %s\n"), arg);
247 if (avr_mcu == &default_mcu)
248 avr_mcu = &mcu_types[i];
250 as_fatal (_ ("redefinition of mcu type `%s'"), mcu_types[i].name);
257 md_undefined_symbol(name)
258 char *name ATTRIBUTE_UNUSED;
263 /* Convert a string pointed to by input_line_pointer into a floating point
264 constant of type `type', and store the appropriate bytes to `*litP'.
265 The number of LITTLENUMS emitted is stored in `*sizeP'. Returns NULL if
266 OK, or an error message otherwise. */
268 md_atof (type, litP, sizeP)
274 LITTLENUM_TYPE words[4];
275 LITTLENUM_TYPE *wordP;
288 return _("bad call to md_atof");
291 t = atof_ieee (input_line_pointer, type, words);
293 input_line_pointer = t;
295 *sizeP = prec * sizeof (LITTLENUM_TYPE);
296 /* This loop outputs the LITTLENUMs in REVERSE order. */
297 for (wordP = words + prec - 1; prec--;)
299 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
300 litP += sizeof (LITTLENUM_TYPE);
306 md_convert_frag (abfd, sec, fragP)
307 bfd *abfd ATTRIBUTE_UNUSED;
308 asection *sec ATTRIBUTE_UNUSED;
309 fragS *fragP ATTRIBUTE_UNUSED;
319 struct avr_opcodes_s *opcode;
320 avr_hash = hash_new();
322 /* Insert unique names into hash table. This hash table then provides a
323 quick index to the first opcode with a particular name in the opcode
326 for (opcode = avr_opcodes; opcode->name; opcode++)
327 hash_insert (avr_hash, opcode->name, (char *) opcode);
329 avr_mod_hash = hash_new ();
331 for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i)
332 hash_insert (avr_mod_hash, EXP_MOD_NAME(i), (void*)(i+10));
334 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
338 /* Resolve STR as a constant expression and return the result.
339 If result greater than MAX then error. */
342 avr_get_constant (str, max)
347 str = skip_space (str);
348 input_line_pointer = str;
351 if (ex.X_op != O_constant)
352 as_bad (_("constant value required"));
354 if (ex.X_add_number > max || ex.X_add_number < 0)
355 as_bad (_("number must be less than %d"), max+1);
356 return ex.X_add_number;
360 /* Parse instruction operands.
361 Returns binary opcode. */
364 avr_operands (opcode, line)
365 struct avr_opcodes_s *opcode;
368 char *op = opcode->constraints;
369 unsigned int bin = opcode->bin_opcode;
370 char *frag = frag_more (opcode->insn_size * 2);
372 int where = frag - frag_now->fr_literal;
373 static unsigned int prev = 0; /* previous opcode */
375 /* Opcode have operands. */
378 unsigned int reg1 = 0;
379 unsigned int reg2 = 0;
380 int reg1_present = 0;
381 int reg2_present = 0;
383 /* Parse first operand. */
384 if (REGISTER_P (*op))
386 reg1 = avr_operand (opcode, where, op, &str);
389 /* Parse second operand. */
401 if (REGISTER_P (*op))
404 str = skip_space (str);
406 as_bad (_ ("`,' required"));
407 str = skip_space (str);
409 reg2 = avr_operand (opcode, where, op, &str);
412 if (reg1_present && reg2_present)
413 reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200);
414 else if (reg2_present)
422 /* detect undefined combinations (like lpm r31,Z+) */
423 if (((bin & 0xFDEF) == 0x91AD) || ((bin & 0xFDEF) == 0x91AE) ||
424 ((bin & 0xFDEF) == 0x91C9) || ((bin & 0xFDEF) == 0x91CA) ||
425 ((bin & 0xFDEF) == 0x91E1) || ((bin & 0xFDEF) == 0x91E2) ||
426 ((bin & 0xFFED) == 0x91E5))
427 as_warn( _("undefined combination of operands"));
429 if (opcode->insn_size == 2)
431 /* warn if previous opcode was cpse/sbic/sbis/sbrc/sbrs
433 if ((prev & 0xFC00) == 0x1000
434 || (prev & 0xFD00) == 0x9900
435 || (prev & 0xFC08) == 0xFC00)
436 as_warn (_("skipping two-word instruction"));
438 bfd_putl32 ((bfd_vma)bin, frag);
441 bfd_putl16 ((bfd_vma)bin, frag);
449 /* Parse one instruction operand.
450 Returns operand bitmask. Also fixups can be generated. */
453 avr_operand (opcode, where, op, line)
454 struct avr_opcodes_s *opcode;
460 unsigned int op_mask = 0;
461 char *str = skip_space (*line);
465 /* Any register operand. */
474 if (*str == 'r' || *str == 'R')
478 str = extract_word (str, r_name, sizeof (r_name));
479 if (isdigit(r_name[1]))
481 if (r_name[2] == '\0')
482 op_mask = r_name[1] - '0';
483 else if (r_name[1] != '0'
484 && isdigit(r_name[2])
485 && r_name[3] == '\0')
486 op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0';
491 op_mask = avr_get_constant (str, 31);
492 str = input_line_pointer;
500 if (op_mask < 16 || op_mask > 23)
501 as_bad (_ ("register r16-r23 required"));
507 as_bad (_ ("register number above 15 required"));
513 as_bad (_ ("even register number required"));
519 if (op_mask & 1 || op_mask > 6)
520 as_bad (_ ("register r24,r26,r28 or r30 required"));
526 as_bad (_ ("register name or number from 0 to 31 required"));
535 str = skip_space (str+1);
544 as_bad (_ ("pointer register (X,Y or Z) required"));
546 str = skip_space (str+1);
551 as_bad (_ ("cannot both predecrement and postincrement"));
554 /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
555 registers, no predecrement, no postincrement */
556 if ((op_mask & 0x100F) && !(avr_mcu->isa & AVR_ISA_SRAM))
557 as_bad (_ ("addressing mode not supported"));
564 as_bad (_ ("can't predecrement"));
566 if (! (*str == 'z' || *str == 'Z'))
567 as_bad (_ ("pointer register Z required"));
569 str = skip_space (str + 1);
580 char c = tolower (*str++);
584 as_bad (_ ("pointer register (Y or Z) required"));
585 str = skip_space (str);
589 x = avr_get_constant (str, 63);
590 str = input_line_pointer;
591 op_mask |= (x & 7) | ((x & (3 << 3)) << 7) | ((x & (1 << 5)) << 8);
598 str = parse_exp (str, &op_expr);
599 fix_new_exp (frag_now, where, opcode->insn_size * 2,
600 &op_expr, false, BFD_RELOC_AVR_CALL);
607 str = parse_exp (str, &op_expr);
608 fix_new_exp (frag_now, where, opcode->insn_size * 2,
609 &op_expr, true, BFD_RELOC_AVR_13_PCREL);
616 str = parse_exp (str, &op_expr);
617 fix_new_exp (frag_now, where, opcode->insn_size * 2,
618 &op_expr, true, BFD_RELOC_AVR_7_PCREL);
625 str = parse_exp (str, &op_expr);
626 fix_new_exp (frag_now, where+2, opcode->insn_size * 2,
627 &op_expr, false, BFD_RELOC_16);
634 bfd_reloc_code_real_type r_type;
635 input_line_pointer = str;
636 r_type = avr_ldi_expression (&op_expr);
637 str = input_line_pointer;
638 fix_new_exp (frag_now, where, 3,
639 &op_expr, false, r_type);
646 x = ~avr_get_constant (str, 255);
647 str = input_line_pointer;
648 op_mask |= (x & 0xf) | ((x << 4) & 0xf00);
655 x = avr_get_constant (str, 63);
656 str = input_line_pointer;
657 op_mask |= (x & 0xf) | ((x & 0x30) << 2);
665 x = avr_get_constant (str, 7);
666 str = input_line_pointer;
676 x = avr_get_constant (str, 63);
677 str = input_line_pointer;
678 op_mask |= (x & 0xf) | ((x & 0x30) << 5);
685 x = avr_get_constant (str, 31);
686 str = input_line_pointer;
693 as_bad (_ ("unknown constraint `%c'"), *op);
699 /* GAS will call this function for each section at the end of the assembly,
700 to permit the CPU backend to adjust the alignment of a section. */
702 md_section_align (seg, addr)
706 int align = bfd_get_section_alignment (stdoutput, seg);
707 return ((addr + (1 << align) - 1) & (-1 << align));
710 /* If you define this macro, it should return the offset between the
711 address of a PC relative fixup and the position from which the PC
712 relative adjustment should be made. On many processors, the base
713 of a PC relative instruction is the next instruction, so this
714 macro would return the length of an instruction. */
716 md_pcrel_from_section (fixp, sec)
720 if (fixp->fx_addsy != (symbolS *)NULL
721 && (!S_IS_DEFINED (fixp->fx_addsy)
722 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
724 return fixp->fx_frag->fr_address + fixp->fx_where;
727 /* GAS will call this for each fixup. It should store the correct
728 value in the object file. */
730 md_apply_fix3 (fixp, valuep, seg)
735 unsigned char *where;
739 if (fixp->fx_addsy == (symbolS *) NULL)
744 else if (fixp->fx_pcrel)
746 segT s = S_GET_SEGMENT (fixp->fx_addsy);
747 if (fixp->fx_addsy && (s == seg || s == absolute_section))
749 value = S_GET_VALUE (fixp->fx_addsy) + *valuep;
757 value = fixp->fx_offset;
758 if (fixp->fx_subsy != (symbolS *) NULL)
760 if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
762 value -= S_GET_VALUE (fixp->fx_subsy);
767 /* We don't actually support subtracting a symbol. */
768 as_bad_where (fixp->fx_file, fixp->fx_line,
769 _ ("expression too complex"));
773 switch (fixp->fx_r_type)
776 fixp->fx_no_overflow = 1;
778 case BFD_RELOC_AVR_7_PCREL:
779 case BFD_RELOC_AVR_13_PCREL:
782 case BFD_RELOC_AVR_CALL:
788 /* Fetch the instruction, insert the fully resolved operand
789 value, and stuff the instruction back again. */
790 where = fixp->fx_frag->fr_literal + fixp->fx_where;
791 insn = bfd_getl16 (where);
793 switch (fixp->fx_r_type)
795 case BFD_RELOC_AVR_7_PCREL:
797 as_bad_where (fixp->fx_file, fixp->fx_line,
798 _("odd address operand: %ld"), value);
799 /* Instruction addresses are always right-shifted by 1. */
801 --value; /* Correct PC. */
802 if (value < -64 || value > 63)
803 as_bad_where (fixp->fx_file, fixp->fx_line,
804 _("operand out of range: %ld"), value);
805 value = (value << 3) & 0x3f8;
806 bfd_putl16 ((bfd_vma) (value | insn), where);
809 case BFD_RELOC_AVR_13_PCREL:
811 as_bad_where (fixp->fx_file, fixp->fx_line,
812 _("odd address operand: %ld"), value);
813 /* Instruction addresses are always right-shifted by 1. */
815 --value; /* Correct PC. */
817 if (value < -2048 || value > 2047)
819 if (avr_mcu->isa & AVR_ISA_WRAP)
827 as_bad_where (fixp->fx_file, fixp->fx_line,
828 _("operand out of range: %ld"), value);
832 bfd_putl16 ((bfd_vma) (value | insn), where);
836 bfd_putl16 ((bfd_vma) value, where);
840 bfd_putl16 ((bfd_vma) value, where);
843 case BFD_RELOC_AVR_16_PM:
844 bfd_putl16 ((bfd_vma) (value>>1), where);
847 case BFD_RELOC_AVR_LO8_LDI:
848 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
851 case -BFD_RELOC_AVR_LO8_LDI:
852 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
855 case BFD_RELOC_AVR_HI8_LDI:
856 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where);
859 case -BFD_RELOC_AVR_HI8_LDI:
860 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where);
863 case BFD_RELOC_AVR_HH8_LDI:
864 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
867 case BFD_RELOC_AVR_LO8_LDI_NEG:
868 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where);
871 case -BFD_RELOC_AVR_LO8_LDI_NEG:
872 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
875 case BFD_RELOC_AVR_HI8_LDI_NEG:
876 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where);
879 case -BFD_RELOC_AVR_HI8_LDI_NEG:
880 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where);
883 case BFD_RELOC_AVR_HH8_LDI_NEG:
884 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
887 case BFD_RELOC_AVR_LO8_LDI_PM:
888 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where);
891 case BFD_RELOC_AVR_HI8_LDI_PM:
892 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where);
895 case BFD_RELOC_AVR_HH8_LDI_PM:
896 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where);
899 case BFD_RELOC_AVR_LO8_LDI_PM_NEG:
900 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where);
903 case BFD_RELOC_AVR_HI8_LDI_PM_NEG:
904 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where);
907 case BFD_RELOC_AVR_HH8_LDI_PM_NEG:
908 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where);
911 case BFD_RELOC_AVR_CALL:
914 x = bfd_getl16 (where);
916 as_bad_where (fixp->fx_file, fixp->fx_line,
917 _("odd address operand: %ld"), value);
919 x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16;
920 bfd_putl16 ((bfd_vma) x, where);
921 bfd_putl16 ((bfd_vma) (value & 0xffff), where+2);
926 as_fatal ( _("line %d: unknown relocation type: 0x%x"),
927 fixp->fx_line, fixp->fx_r_type);
933 switch (fixp->fx_r_type)
935 case -BFD_RELOC_AVR_HI8_LDI_NEG:
936 case -BFD_RELOC_AVR_HI8_LDI:
937 case -BFD_RELOC_AVR_LO8_LDI_NEG:
938 case -BFD_RELOC_AVR_LO8_LDI:
939 as_bad_where (fixp->fx_file, fixp->fx_line,
940 _("only constant expression allowed"));
946 fixp->fx_addnumber = value;
952 /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS
953 will pass the resulting reloc to `bfd_install_relocation'. This
954 currently works poorly, as `bfd_install_relocation' often does the
955 wrong thing, and instances of `tc_gen_reloc' have been written to
956 work around the problems, which in turns makes it difficult to fix
957 `bfd_install_relocation'. */
959 /* If while processing a fixup, a reloc really needs to be created
960 then it is done here. */
963 tc_gen_reloc (seg, fixp)
964 asection *seg ATTRIBUTE_UNUSED;
969 reloc = (arelent *) xmalloc (sizeof (arelent));
971 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
972 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
974 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
975 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
976 if (reloc->howto == (reloc_howto_type *) NULL)
978 as_bad_where (fixp->fx_file, fixp->fx_line,
979 _("reloc %d not supported by object file format"),
980 (int)fixp->fx_r_type);
984 if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
985 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
986 reloc->address = fixp->fx_offset;
988 reloc->addend = fixp->fx_offset;
998 struct avr_opcodes_s * opcode;
1001 str = skip_space (extract_word (str, op, sizeof(op)));
1004 as_bad (_ ("can't find opcode "));
1006 opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
1010 as_bad (_ ("unknown opcode `%s'"), op);
1014 /* Special case for opcodes with optional operands (lpm, elpm) -
1015 version with operands exists in avr_opcodes[] in the next entry. */
1017 if (*str && *opcode->constraints == '?')
1020 if ((opcode->isa & avr_mcu->isa) != opcode->isa)
1021 as_bad (_ ("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
1023 /* We used to set input_line_pointer to the result of get_operands,
1024 but that is wrong. Our caller assumes we don't change it. */
1026 char *t = input_line_pointer;
1027 avr_operands (opcode, &str);
1028 if (*skip_space (str))
1029 as_bad (_ ("garbage at end of line"));
1030 input_line_pointer = t;
1034 /* Parse ordinary expression. */
1040 input_line_pointer = s;
1042 if (op->X_op == O_absent)
1043 as_bad (_("missing operand"));
1044 return input_line_pointer;
1048 /* Parse special expressions (needed for LDI command):
1053 where xx is: hh, hi, lo
1055 static bfd_reloc_code_real_type
1056 avr_ldi_expression (exp)
1059 char *str = input_line_pointer;
1065 str = extract_word (str, op, sizeof (op));
1068 mod = (int) hash_find (avr_mod_hash, op);
1073 str = skip_space (str);
1078 if (strncmp ("pm(", str, 3) == 0
1079 || strncmp ("-(pm(", str, 5) == 0)
1087 as_bad (_ ("illegal expression"));
1097 if (*str == '-' && *(str + 1) == '(')
1103 input_line_pointer = str;
1107 if (*input_line_pointer != ')')
1109 as_bad (_ ("`)' required"));
1112 input_line_pointer++;
1115 return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod);
1119 input_line_pointer = tmp;
1121 return BFD_RELOC_AVR_LO8_LDI;
1124 /* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1125 `avr_cons_fix_new' */
1126 static int exp_mod_pm = 0;
1128 /* Parse special CONS expression: pm (expression)
1129 which is used for addressing to a program memory.
1130 Relocation: BFD_RELOC_AVR_16_PM */
1132 avr_parse_cons_expression (exp, nbytes)
1140 tmp = input_line_pointer = skip_space (input_line_pointer);
1144 char * pm_name = "pm";
1145 int len = strlen (pm_name);
1146 if (strncasecmp (input_line_pointer, pm_name, len) == 0)
1148 input_line_pointer = skip_space (input_line_pointer + len);
1149 if (*input_line_pointer == '(')
1151 input_line_pointer = skip_space (input_line_pointer + 1);
1154 if (*input_line_pointer == ')')
1155 ++input_line_pointer;
1158 as_bad (_ ("`)' required"));
1163 input_line_pointer = tmp;
1170 avr_cons_fix_new(frag, where, nbytes, exp)
1176 if (exp_mod_pm == 0)
1179 fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_16);
1180 else if (nbytes == 4)
1181 fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_32);
1183 as_bad (_ ("illegal %srelocation size: %d"), "", nbytes);
1188 fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_AVR_16_PM);
1190 as_bad (_ ("illegal %srelocation size: %d"), "`pm' ", nbytes);