1 /* tc-z8k.c -- Assemble code for the Zilog Z800n
2 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2003,
3 2005, 2006 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
22 /* Written By Steve Chamberlain <sac@cygnus.com>. */
25 #include "safe-ctype.h"
27 #include "opcodes/z8k-opc.h"
29 const char comment_chars[] = "!";
30 const char line_comment_chars[] = "#";
31 const char line_separator_chars[] = ";";
34 extern int coff_flags;
37 /* This is non-zero if target was set from the command line. */
38 static int z8k_target_from_cmdline;
46 bfd_set_arch_mach (stdoutput, TARGET_ARCH, bfd_mach_z8001);
51 bfd_set_arch_mach (stdoutput, TARGET_ARCH, bfd_mach_z8002);
56 even (int ignore ATTRIBUTE_UNUSED)
59 record_alignment (now_seg, 1);
73 sval (int ignore ATTRIBUTE_UNUSED)
76 if (*input_line_pointer == '\'')
80 c = *input_line_pointer++;
85 c = (tohex (input_line_pointer[0]) << 4)
86 | tohex (input_line_pointer[1]);
87 input_line_pointer += 2;
89 FRAG_APPEND_1_CHAR (c);
90 c = *input_line_pointer++;
92 demand_empty_rest_of_line ();
96 /* This table describes all the machine specific pseudo-ops the assembler
97 has to support. The fields are:
98 pseudo-op name without dot
99 function to call to execute this pseudo-op
100 Integer arg to pass to the function
103 const pseudo_typeS md_pseudo_table[] = {
105 {"data.b" , cons , 1},
106 {"data.w" , cons , 2},
107 {"data.l" , cons , 4},
108 {"form" , listing_psize , 0},
109 {"heading", listing_title , 0},
110 {"import" , s_ignore , 0},
111 {"page" , listing_eject , 0},
112 {"program", s_ignore , 0},
113 {"z8001" , s_segm , 1},
114 {"z8002" , s_segm , 0},
116 {"segm" , s_segm , 1},
117 {"unsegm" , s_segm , 0},
118 {"unseg" , s_segm , 0},
119 {"name" , s_app_file , 0},
120 {"global" , s_globl , 0},
125 {"rsect" , obj_coff_section, 0},
126 {"sect" , obj_coff_section, 0},
127 {"block" , s_space , 0},
132 const char EXP_CHARS[] = "eE";
134 /* Chars that mean this number is a floating point constant.
137 const char FLT_CHARS[] = "rRsSfFdDxXpP";
139 /* Opcode mnemonics. */
140 static struct hash_control *opcode_hash_control;
145 const opcode_entry_type *opcode;
148 opcode_hash_control = hash_new ();
150 for (opcode = z8k_table; opcode->name; opcode++)
152 /* Only enter unique codes into the table. */
153 if (idx != opcode->idx)
154 hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
158 /* Default to z8002. */
159 if (! z8k_target_from_cmdline)
162 /* Insert the pseudo ops, too. */
163 for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
165 opcode_entry_type *fake_opcode;
166 fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
167 fake_opcode->name = md_pseudo_table[idx].poc_name;
168 fake_opcode->func = (void *) (md_pseudo_table + idx);
169 fake_opcode->opcode = 250;
170 hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
174 typedef struct z8k_op {
183 /* Any other register associated with the mode. */
186 /* Any expression. */
190 static expressionS *da_operand;
191 static expressionS *imm_operand;
196 static int the_flags;
197 static int the_interrupt;
199 /* Determine register number. src points to the ascii number
200 (after "rl", "rh", "r", "rr", or "rq"). If a character
201 outside the set of {0,',',')','('} follows the number,
202 return NULL to indicate that it's not a valid register
206 whatreg (unsigned int *reg, char *src)
208 unsigned int new_reg;
210 /* src[0] is already known to be a digit. */
211 if (ISDIGIT (src[1]))
213 new_reg = (src[0] - '0') * 10 + src[1] - '0';
218 new_reg = (src[0] - '0');
222 if (src[0] != 0 && src[0] != ',' && src[0] != '(' && src[0] != ')')
235 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
243 /* Try to parse a reg name. Return a pointer to the first character
244 in SRC after the reg name. */
247 parse_reg (char *src, int *mode, unsigned int *reg)
252 /* Check for stack pointer "sp" alias. */
253 if ((src[0] == 's' || src[0] == 'S')
254 && (src[1] == 'p' || src[1] == 'P')
255 && (src[2] == 0 || src[2] == ','))
259 *mode = CLASS_REG_LONG;
264 *mode = CLASS_REG_WORD;
270 if (src[0] == 'r' || src[0] == 'R')
272 if (src[1] == 'r' || src[1] == 'R')
274 if (src[2] < '0' || src[2] > '9')
275 return NULL; /* Assume no register name but a label starting with 'rr'. */
276 *mode = CLASS_REG_LONG;
277 res = whatreg (reg, src + 2);
279 return NULL; /* Not a valid register name. */
282 as_bad (_("register rr%d out of range"), regno);
284 as_bad (_("register rr%d does not exist"), regno);
286 else if (src[1] == 'h' || src[1] == 'H')
288 if (src[2] < '0' || src[2] > '9')
289 return NULL; /* Assume no register name but a label starting with 'rh'. */
290 *mode = CLASS_REG_BYTE;
291 res = whatreg (reg, src + 2);
293 return NULL; /* Not a valid register name. */
296 as_bad (_("register rh%d out of range"), regno);
298 else if (src[1] == 'l' || src[1] == 'L')
300 if (src[2] < '0' || src[2] > '9')
301 return NULL; /* Assume no register name but a label starting with 'rl'. */
302 *mode = CLASS_REG_BYTE;
303 res = whatreg (reg, src + 2);
305 return NULL; /* Not a valid register name. */
308 as_bad (_("register rl%d out of range"), regno);
311 else if (src[1] == 'q' || src[1] == 'Q')
313 if (src[2] < '0' || src[2] > '9')
314 return NULL; /* Assume no register name but a label starting with 'rq'. */
315 *mode = CLASS_REG_QUAD;
316 res = whatreg (reg, src + 2);
318 return NULL; /* Not a valid register name. */
321 as_bad (_("register rq%d out of range"), regno);
323 as_bad (_("register rq%d does not exist"), regno);
327 if (src[1] < '0' || src[1] > '9')
328 return NULL; /* Assume no register name but a label starting with 'r'. */
329 *mode = CLASS_REG_WORD;
330 res = whatreg (reg, src + 1);
332 return NULL; /* Not a valid register name. */
335 as_bad (_("register r%d out of range"), regno);
342 parse_exp (char *s, expressionS *op)
344 char *save = input_line_pointer;
347 input_line_pointer = s;
349 if (op->X_op == O_absent)
350 as_bad (_("missing operand"));
351 new = input_line_pointer;
352 input_line_pointer = save;
356 /* The many forms of operand:
371 checkfor (char *ptr, char what)
376 as_bad (_("expected %c"), what);
381 /* Make sure the mode supplied is the size of a word. */
384 regword (int mode, char *string)
391 as_bad (_("register is wrong size for a word %s"), string);
395 /* Make sure the mode supplied is the size of an address. */
398 regaddr (int mode, char *string)
402 ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
405 as_bad (_("register is wrong size for address %s"), string);
414 static struct ctrl_names ctrl_table[] = {
415 { 0x1, "flags" }, /* ldctlb only. */
416 { 0x2, "fcw" }, /* ldctl only. Applies to all remaining control registers. */
428 get_ctrl_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED)
436 mode->mode = CLASS_CTRL;
437 for (i = 0; ctrl_table[i].name; i++)
439 l = strlen (ctrl_table[i].name);
440 if (! strncasecmp (ctrl_table[i].name, src, l))
442 the_ctrl = ctrl_table[i].value;
443 if (*(src + l) && *(src + l) != ',')
445 *ptr = src + l; /* Valid control name found: "consume" it. */
457 static struct flag_names flag_table[] = {
469 get_flags_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED)
479 mode->mode = CLASS_FLAGS;
481 for (j = 0; j <= 9; j++)
486 for (i = 0; flag_table[i].name; i++)
488 if (flag_table[i].name[0] == c)
490 the_flags = the_flags | flag_table[i].value;
502 struct interrupt_names {
507 static struct interrupt_names intr_table[] = {
516 get_interrupt_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED)
524 mode->mode = CLASS_IMM;
529 for (i = 0; intr_table[i].name; i++)
531 l = strlen (intr_table[i].name);
532 if (! strncasecmp (intr_table[i].name, src, l))
534 the_interrupt |= intr_table[i].value;
535 if (*(src + l) && *(src + l) != ',')
539 as_bad (_("unknown interrupt %s"), src);
540 while (**ptr && ! is_end_of_line[(unsigned char) **ptr])
541 (*ptr)++; /* Consume rest of line. */
561 /* No interrupt type specified, opcode won't do anything. */
562 as_warn (_("opcode has no effect"));
571 static struct cc_names table[] = {
606 get_cc_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED)
614 mode->mode = CLASS_CC;
615 for (i = 0; table[i].name; i++)
617 l = strlen (table[i].name);
618 if (! strncasecmp (table[i].name, src, l))
620 the_cc = table[i].value;
621 if (*(src + l) && *(src + l) != ',')
623 *ptr = src + l; /* Valid cc found: "consume" it. */
627 the_cc = 0x8; /* Not recognizing the cc defaults to t. (Assuming no cc present.) */
631 get_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED)
642 mode->mode = CLASS_IMM;
643 imm_operand = &(mode->exp);
644 src = parse_exp (src + 1, &(mode->exp));
646 else if (*src == '@')
648 mode->mode = CLASS_IR;
649 src = parse_reg (src + 1, &mode->regsize, &mode->reg);
655 end = parse_reg (src, &mode->mode, ®n);
666 end = parse_reg (src, &nw, &nr);
673 as_bad (_("Missing ) in ra(rb)"));
677 regaddr (mode->mode, "ra(rb) ra");
678 mode->mode = CLASS_BX;
688 src = parse_exp (src, &(mode->exp));
689 src = checkfor (src, ')');
690 mode->mode = CLASS_BA;
693 imm_operand = &(mode->exp);
704 /* No initial reg. */
705 src = parse_exp (src, &(mode->exp));
709 end = parse_reg (src, &(mode->mode), ®n);
710 regword (mode->mode, "addr(Ra) ra");
711 mode->mode = CLASS_X;
714 da_operand = &(mode->exp);
715 src = checkfor (end, ')');
719 /* Just an address. */
720 mode->mode = CLASS_DA;
723 da_operand = &(mode->exp);
731 get_operands (const opcode_entry_type *opcode, char *op_end, op_type *operand)
736 switch (opcode->noperands)
746 if (opcode->arg_info[0] == CLASS_CC)
748 get_cc_operand (&ptr, operand + 0, 0);
751 if (*ptr && ! is_end_of_line[(unsigned char) *ptr])
753 as_bad (_("invalid condition code '%s'"), ptr);
754 while (*ptr && ! is_end_of_line[(unsigned char) *ptr])
755 ptr++; /* Consume rest of line. */
758 else if (opcode->arg_info[0] == CLASS_FLAGS)
760 get_flags_operand (&ptr, operand + 0, 0);
763 if (*ptr && ! is_end_of_line[(unsigned char) *ptr])
765 as_bad (_("invalid flag '%s'"), ptr);
766 while (*ptr && ! is_end_of_line[(unsigned char) *ptr])
767 ptr++; /* Consume rest of line. */
770 else if (opcode->arg_info[0] == (CLASS_IMM + (ARG_IMM2)))
771 get_interrupt_operand (&ptr, operand + 0, 0);
773 get_operand (&ptr, operand + 0, 0);
780 if (opcode->arg_info[0] == CLASS_CC)
782 get_cc_operand (&ptr, operand + 0, 0);
785 if (*ptr != ',' && strchr (ptr + 1, ','))
792 as_bad (_("invalid condition code '%s'"), savptr);
795 else if (opcode->arg_info[0] == CLASS_CTRL)
797 get_ctrl_operand (&ptr, operand + 0, 0);
802 get_operand (&ptr, operand + 0, 0);
808 get_ctrl_operand (&ptr, operand + 1, 1);
815 get_operand (&ptr, operand + 0, 0);
821 get_operand (&ptr, operand + 1, 1);
825 get_operand (&ptr, operand + 0, 0);
828 get_operand (&ptr, operand + 1, 1);
831 get_operand (&ptr, operand + 2, 2);
835 get_operand (&ptr, operand + 0, 0);
838 get_operand (&ptr, operand + 1, 1);
841 get_operand (&ptr, operand + 2, 2);
844 get_cc_operand (&ptr, operand + 3, 3);
854 /* Passed a pointer to a list of opcodes which use different
855 addressing modes. Return the opcode which matches the opcodes
858 static opcode_entry_type *
859 get_specific (opcode_entry_type *opcode, op_type *operands)
861 opcode_entry_type *this_try = opcode;
863 unsigned int noperands = opcode->noperands;
865 int this_index = opcode->idx;
867 while (this_index == opcode->idx && !found)
872 for (i = 0; i < noperands; i++)
874 unsigned int mode = operands[i].mode;
876 if (((mode & CLASS_MASK) == CLASS_IR) && ((this_try->arg_info[i] & CLASS_MASK) == CLASS_IRO))
878 mode = operands[i].mode = (operands[i].mode & ~CLASS_MASK) | CLASS_IRO;
881 if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
883 /* It could be a pc rel operand, if this is a da mode
884 and we like disps, then insert it. */
886 if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
888 /* This is the case. */
889 operands[i].mode = CLASS_DISP;
891 else if (mode == CLASS_BA && this_try->arg_info[i])
893 /* Can't think of a way to turn what we've been
894 given into something that's OK. */
897 else if (this_try->arg_info[i] & CLASS_PR)
899 if (mode == CLASS_REG_LONG && segmented_mode)
903 else if (mode == CLASS_REG_WORD && !segmented_mode)
913 switch (mode & CLASS_MASK)
918 if (operands[i].regsize != CLASS_REG_WORD)
919 as_bad (_("invalid indirect register size"));
920 reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
923 if ((segmented_mode && operands[i].regsize != CLASS_REG_LONG)
924 || (!segmented_mode && operands[i].regsize != CLASS_REG_WORD))
925 as_bad (_("invalid indirect register size"));
926 reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
938 reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
941 if (this_try->opcode == OPC_ldctlb && the_ctrl != 1)
942 as_bad (_("invalid control register name"));
957 static char buffer[20];
960 newfix (int ptr, int type, int size, expressionS *operand)
965 /* Size is in nibbles. */
966 if (operand->X_add_symbol
967 || operand->X_op_symbol
968 || operand->X_add_number)
972 case BFD_RELOC_8_PCREL:
973 case BFD_RELOC_Z8K_CALLR:
974 case BFD_RELOC_Z8K_DISP7:
977 fixP = fix_new_exp (frag_now, ptr, size / 2,
978 operand, is_pcrel, type);
980 fixP->fx_no_overflow = 1;
985 apply_fix (char *ptr, int type, expressionS *operand, int size)
987 long n = operand->X_add_number;
989 /* size is in nibbles. */
991 newfix ((ptr - buffer) / 2, type, size + 1, operand);
994 case 8: /* 8 nibbles == 32 bits. */
999 case 4: /* 4 nibbles == 16 bits. */
1011 /* Now we know what sort of opcodes it is. Let's build the bytes. */
1014 build_bytes (opcode_entry_type *this_try, struct z8k_op *operand ATTRIBUTE_UNUSED)
1016 char *output_ptr = buffer;
1019 unsigned int *class_ptr;
1021 frag_wane (frag_now);
1024 if (frag_room () < 8)
1025 frag_grow (8); /* Make room for maximum instruction size. */
1027 memset (buffer, 0, sizeof (buffer));
1028 class_ptr = this_try->byte_info;
1030 for (nibble = 0; (c = *class_ptr++); nibble++)
1033 switch (c & CLASS_MASK)
1039 /* Direct address, we don't cope with the SS mode right now. */
1042 /* da_operand->X_add_number |= 0x80000000; -- Now set at relocation time. */
1043 output_ptr = apply_fix (output_ptr, BFD_RELOC_32, da_operand, 8);
1047 output_ptr = apply_fix (output_ptr, BFD_RELOC_16, da_operand, 4);
1053 output_ptr = apply_fix (output_ptr, BFD_RELOC_8_PCREL, da_operand, 2);
1060 output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_DISP7, da_operand, 2);
1067 output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_DISP7, da_operand, 2);
1068 output_ptr[-2] = 0x8;
1072 case CLASS_BIT_1OR2:
1073 *output_ptr = c & 0xf;
1076 if (imm_operand->X_add_number == 2)
1078 else if (imm_operand->X_add_number != 1)
1079 as_bad (_("immediate must be 1 or 2"));
1082 as_bad (_("immediate 1 or 2 expected"));
1086 *output_ptr++ = the_cc;
1089 if (the_ctrl < 2 || the_ctrl > 7)
1090 as_bad (_("invalid control register name"));
1091 *output_ptr++ = the_ctrl;
1094 if (the_ctrl < 2 || the_ctrl > 7)
1095 as_bad (_("invalid control register name"));
1096 *output_ptr++ = the_ctrl | 0x8;
1099 *output_ptr++ = (~the_interrupt & 0x3);
1102 *output_ptr++ = (~the_interrupt & 0x3) | 0x4;
1105 *output_ptr++ = the_flags;
1109 *output_ptr++ = c & 0xf;
1112 if (reg[c & 0xf] == 0)
1113 as_bad (_("can't use R0 here"));
1116 case CLASS_REG_BYTE:
1117 case CLASS_REG_WORD:
1118 case CLASS_REG_LONG:
1119 case CLASS_REG_QUAD:
1120 /* Insert bit mattern of right reg. */
1121 *output_ptr++ = reg[c & 0xf];
1124 switch (c & ARG_MASK)
1127 output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_CALLR, da_operand, 4);
1130 output_ptr = apply_fix (output_ptr, BFD_RELOC_16_PCREL, da_operand, 4);
1133 output_ptr = apply_fix (output_ptr, BFD_RELOC_16, da_operand, 4);
1140 switch (c & ARG_MASK)
1143 if (imm_operand->X_add_number > 15)
1144 as_bad (_("immediate value out of range"));
1145 imm_operand->X_add_number = -imm_operand->X_add_number;
1146 output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_IMM4L, imm_operand, 1);
1148 /*case ARG_IMMNMINUS1: not used. */
1150 imm_operand->X_add_number--;
1153 if (imm_operand->X_add_number > 15)
1154 as_bad (_("immediate value out of range"));
1155 output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_IMM4L, imm_operand, 1);
1158 imm_operand->X_add_number = -imm_operand->X_add_number;
1161 output_ptr = apply_fix (output_ptr, BFD_RELOC_8, imm_operand, 2);
1164 output_ptr = apply_fix (output_ptr, BFD_RELOC_16, imm_operand, 4);
1167 output_ptr = apply_fix (output_ptr, BFD_RELOC_32, imm_operand, 8);
1176 /* Copy from the nibble buffer into the frag. */
1178 int length = (output_ptr - buffer) / 2;
1180 char *fragp = frag_more (length);
1182 while (src < output_ptr)
1184 *fragp = (src[0] << 4) | src[1];
1191 /* This is the guts of the machine-dependent assembler. STR points to a
1192 machine dependent instruction. This function is supposed to emit
1193 the frags/bytes it assembles to. */
1196 md_assemble (char *str)
1201 struct z8k_op operand[4];
1202 opcode_entry_type *opcode;
1204 /* Drop leading whitespace. */
1208 /* Find the op code end. */
1209 for (op_start = op_end = str;
1210 *op_end != 0 && *op_end != ' ' && ! is_end_of_line[(unsigned char) *op_end];
1214 if (op_end == op_start)
1216 as_bad (_("can't find opcode "));
1220 *op_end = 0; /* Zero-terminate op code string for hash_find() call. */
1222 opcode = (opcode_entry_type *) hash_find (opcode_hash_control, op_start);
1226 as_bad (_("unknown opcode"));
1230 *op_end = c; /* Restore original string. */
1232 if (opcode->opcode == 250)
1236 char *old = input_line_pointer;
1238 /* Was really a pseudo op. */
1240 input_line_pointer = op_end;
1244 while (*input_line_pointer == ' ')
1245 input_line_pointer++;
1246 p = (pseudo_typeS *) (opcode->func);
1248 (p->poc_handler) (p->poc_val);
1249 input_line_pointer = old;
1254 char *new_input_line_pointer;
1256 new_input_line_pointer = get_operands (opcode, op_end, operand);
1257 if (new_input_line_pointer)
1259 input_line_pointer = new_input_line_pointer;
1260 opcode = get_specific (opcode, operand);
1263 if (new_input_line_pointer == NULL || opcode == NULL)
1265 /* Couldn't find an opcode which matched the operands. */
1266 char *where = frag_more (2);
1271 as_bad (_("Can't find opcode to match operands"));
1275 build_bytes (opcode, operand);
1279 /* We have no need to default values of symbols. */
1282 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
1287 /* Various routines to kill one day. */
1288 /* Equal to MAX_PRECISION in atof-ieee.c. */
1289 #define MAX_LITTLENUMS 6
1291 /* Turn a string in input_line_pointer into a floating point constant
1292 of type TYPE, and store the appropriate bytes in *LITP. The number
1293 of LITTLENUMS emitted is stored in *SIZEP. An error message is
1294 returned, or NULL on OK. */
1297 md_atof (int type, char *litP, int *sizeP)
1300 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1301 LITTLENUM_TYPE *wordP;
1332 return _("Bad call to MD_ATOF()");
1334 t = atof_ieee (input_line_pointer, type, words);
1336 input_line_pointer = t;
1338 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1339 for (wordP = words; prec--;)
1341 md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
1342 litP += sizeof (LITTLENUM_TYPE);
1347 const char *md_shortopts = "z:";
1349 struct option md_longopts[] =
1351 #define OPTION_RELAX (OPTION_MD_BASE)
1352 {"linkrelax", no_argument, NULL, OPTION_RELAX},
1353 {NULL, no_argument, NULL, 0}
1356 size_t md_longopts_size = sizeof (md_longopts);
1359 md_parse_option (int c, char *arg)
1364 if (!strcmp (arg, "8001"))
1366 else if (!strcmp (arg, "8002"))
1370 as_bad (_("invalid architecture -z%s"), arg);
1373 z8k_target_from_cmdline = 1;
1388 md_show_usage (FILE *stream)
1390 fprintf (stream, _("\
1392 -z8001 generate segmented code\n\
1393 -z8002 generate unsegmented code\n\
1394 -linkrelax create linker relaxable code\n"));
1398 md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
1399 segT sec ATTRIBUTE_UNUSED,
1400 fragS *fragP ATTRIBUTE_UNUSED)
1402 printf (_("call to md_convert_frag\n"));
1406 /* Generate a machine dependent reloc from a fixup. */
1409 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
1410 fixS *fixp ATTRIBUTE_UNUSED)
1414 reloc = xmalloc (sizeof (*reloc));
1415 reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
1416 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1417 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1418 reloc->addend = fixp->fx_offset;
1419 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1423 as_bad_where (fixp->fx_file, fixp->fx_line,
1424 "Cannot represent %s relocation in object file",
1425 bfd_get_reloc_code_name (fixp->fx_r_type));
1432 md_section_align (segT seg, valueT size)
1434 int align = bfd_get_section_alignment (stdoutput, seg);
1435 valueT mask = ((valueT) 1 << align) - 1;
1437 return (size + mask) & ~mask;
1440 /* Attempt to simplify or eliminate a fixup. To indicate that a fixup
1441 has been eliminated, set fix->fx_done. If fix->fx_addsy is non-NULL,
1442 we will have to generate a reloc entry. */
1444 md_apply_fix (fixS *fixP, valueT *valP, segT segment ATTRIBUTE_UNUSED)
1446 long val = * (long *) valP;
1447 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1449 switch (fixP->fx_r_type)
1451 case BFD_RELOC_Z8K_IMM4L:
1454 fixP->fx_no_overflow = 1;
1458 buf[0] = (buf[0] & 0xf0) | (val & 0xf);
1464 fixP->fx_no_overflow = 1;
1474 fixP->fx_no_overflow = 1;
1479 *buf++ = (val >> 8);
1487 fixP->fx_no_overflow = 1;
1492 *buf++ = (val >> 24);
1493 *buf++ = (val >> 16);
1494 *buf++ = (val >> 8);
1499 case BFD_RELOC_8_PCREL:
1502 fixP->fx_no_overflow = 1;
1508 as_bad_where (fixP->fx_file, fixP->fx_line,
1509 _("cannot branch to odd address"));
1511 if (val > 127 || val < -128)
1512 as_bad_where (fixP->fx_file, fixP->fx_line,
1513 _("relative jump out of range"));
1515 fixP->fx_no_overflow = 1;
1520 case BFD_RELOC_16_PCREL:
1523 fixP->fx_no_overflow = 1;
1528 val = val - fixP->fx_frag->fr_address + fixP->fx_where - fixP->fx_size;
1529 if (val > 32767 || val < -32768)
1530 as_bad_where (fixP->fx_file, fixP->fx_line,
1531 _("relative address out of range"));
1532 *buf++ = (val >> 8);
1534 fixP->fx_no_overflow = 1;
1539 case BFD_RELOC_Z8K_CALLR:
1542 fixP->fx_no_overflow = 1;
1548 as_bad_where (fixP->fx_file, fixP->fx_line,
1549 _("cannot branch to odd address"));
1550 if (val > 4096 || val < -4095)
1551 as_bad_where (fixP->fx_file, fixP->fx_line,
1552 _("relative call out of range"));
1554 *buf = (*buf & 0xf0) | ((val >> 8) & 0xf);
1556 *buf++ = val & 0xff;
1557 fixP->fx_no_overflow = 1;
1562 case BFD_RELOC_Z8K_DISP7:
1565 fixP->fx_no_overflow = 1;
1571 as_bad_where (fixP->fx_file, fixP->fx_line,
1572 _("cannot branch to odd address"));
1574 if (val > 0 || val < -127)
1575 as_bad_where (fixP->fx_file, fixP->fx_line,
1576 _("relative jump out of range"));
1577 *buf = (*buf & 0x80) | (-val & 0x7f);
1578 fixP->fx_no_overflow = 1;
1584 printf(_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type);
1588 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1593 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
1594 segT segment_type ATTRIBUTE_UNUSED)
1596 printf (_("call to md_estimate_size_before_relax\n"));
1600 /* Put number into target byte order. */
1603 md_number_to_chars (char *ptr, valueT use, int nbytes)
1605 number_to_chars_bigendian (ptr, use, nbytes);
1608 /* On the Z8000, a PC-relative offset is relative to the address of the
1609 instruction plus its size. */
1611 md_pcrel_from (fixS *fixP)
1613 return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
1617 tc_coff_symbol_emit_hook (symbolS *s ATTRIBUTE_UNUSED)