1 /* tc-dlx.c -- Assemble for the DLX
2 Copyright 2002, 2003, 2004, 2005, 2007, 2009, 2010, 2012
3 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 3, 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 /* Initially created by Kuang Hwa Lin, 3/20/2002. */
25 #include "safe-ctype.h"
27 #include "opcode/dlx.h"
29 /* Make it easier to clone this machine desc into another one. */
30 #define machine_opcode dlx_opcode
31 #define machine_opcodes dlx_opcodes
32 #define machine_ip dlx_ip
33 #define machine_it dlx_it
35 #define NO_RELOC BFD_RELOC_NONE
36 #define RELOC_DLX_REL26 BFD_RELOC_DLX_JMP26
37 #define RELOC_DLX_16 BFD_RELOC_16
38 #define RELOC_DLX_REL16 BFD_RELOC_16_PCREL_S2
39 #define RELOC_DLX_HI16 BFD_RELOC_HI16_S
40 #define RELOC_DLX_LO16 BFD_RELOC_LO16
41 #define RELOC_DLX_VTINHERIT BFD_RELOC_VTABLE_INHERIT
42 #define RELOC_DLX_VTENTRY BFD_RELOC_VTABLE_ENTRY
44 /* handle of the OPCODE hash table */
45 static struct hash_control
*op_hash
= NULL
;
55 int reloc_offset
; /* Offset of reloc within insn. */
62 /* This array holds the chars that always start a comment. If the
63 pre-processor is disabled, these aren't very useful. */
64 const char comment_chars
[] = ";";
66 /* This array holds the chars that only start a comment at the beginning of
67 a line. If the line seems to have the form '# 123 filename'
68 .line and .file directives will appear in the pre-processed output. */
69 /* Note that input_file.c hand checks for '#' at the beginning of the
70 first line of the input file. This is because the compiler outputs
71 #NO_APP at the beginning of its output. */
72 /* Also note that comments like this one will always work. */
73 const char line_comment_chars
[] = "#";
75 /* We needed an unused char for line separation to work around the
76 lack of macros, using sed and such. */
77 const char line_separator_chars
[] = "@";
79 /* Chars that can be used to separate mant from exp in floating point nums. */
80 const char EXP_CHARS
[] = "eE";
82 /* Chars that mean this number is a floating point constant.
85 const char FLT_CHARS
[] = "rRsSfFdDxXpP";
88 insert_sreg (char *regname
, int regnum
)
90 /* Must be large enough to hold the names of the special registers. */
94 symbol_table_insert (symbol_new (regname
, reg_section
, (valueT
) regnum
,
96 for (i
= 0; regname
[i
]; i
++)
97 buf
[i
] = ISLOWER (regname
[i
]) ? TOUPPER (regname
[i
]) : regname
[i
];
100 symbol_table_insert (symbol_new (buf
, reg_section
, (valueT
) regnum
,
101 &zero_address_frag
));
104 /* Install symbol definitions for assorted special registers.
105 See MIPS Assembly Language Programmer's Guide page 1-4 */
108 define_some_regs (void)
110 /* Software representation. */
111 insert_sreg ("zero", 0);
112 insert_sreg ("at", 1);
113 insert_sreg ("v0", 2);
114 insert_sreg ("v1", 3);
115 insert_sreg ("a0", 4);
116 insert_sreg ("a1", 5);
117 insert_sreg ("a2", 6);
118 insert_sreg ("a3", 7);
119 insert_sreg ("t0", 8);
120 insert_sreg ("t1", 9);
121 insert_sreg ("t2", 10);
122 insert_sreg ("t3", 11);
123 insert_sreg ("t4", 12);
124 insert_sreg ("t5", 13);
125 insert_sreg ("t6", 14);
126 insert_sreg ("t7", 15);
127 insert_sreg ("s0", 16);
128 insert_sreg ("s1", 17);
129 insert_sreg ("s2", 18);
130 insert_sreg ("s3", 19);
131 insert_sreg ("s4", 20);
132 insert_sreg ("s5", 21);
133 insert_sreg ("s6", 22);
134 insert_sreg ("s7", 23);
135 insert_sreg ("t8", 24);
136 insert_sreg ("t9", 25);
137 insert_sreg ("k0", 26);
138 insert_sreg ("k1", 27);
139 insert_sreg ("gp", 28);
140 insert_sreg ("sp", 29);
141 insert_sreg ("fp", 30);
142 insert_sreg ("ra", 31);
143 /* Special registers. */
144 insert_sreg ("pc", 0);
145 insert_sreg ("npc", 1);
146 insert_sreg ("iad", 2);
149 /* Subroutine check the string to match an register. */
152 match_sft_register (char *name
)
154 #define MAX_REG_NO 35
155 /* Currently we have 35 software registers defined -
156 we borrowed from MIPS. */
157 static char *soft_reg
[] =
159 "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
160 "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9",
161 "s0", "s1", "s2", "s3", "s4", "s5", "s7", "k0", "k1",
162 "gp", "sp", "fp", "ra", "pc", "npc", "iad",
163 "EndofTab" /* End of the Table indicator */
165 char low_name
[21], *ptr
;
168 for (ptr
= name
,idx
= 0; *ptr
!= '\0'; ptr
++)
169 low_name
[idx
++] = TOLOWER (*ptr
);
171 low_name
[idx
] = '\0';
174 while (idx
< MAX_REG_NO
&& strcmp (soft_reg
[idx
], & low_name
[0]))
177 return idx
< MAX_REG_NO
;
180 /* Subroutine check the string to match an register. */
183 is_ldst_registers (char *name
)
187 /* The first character of the register name got to be either %, $, r of R. */
188 if ((ptr
[0] == '%' || ptr
[0] == '$' || ptr
[0] == 'r' || ptr
[0] == 'R')
189 && ISDIGIT ((unsigned char) ptr
[1]))
192 /* Now check the software register representation. */
193 return match_sft_register (ptr
);
196 /* Subroutine of s_proc so targets can choose a different default prefix.
197 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
202 /* Record the current function so that we can issue an error message for
203 misplaced .func,.endfunc, and also so that .endfunc needs no
205 static char *current_name
;
206 static char *current_label
;
210 if (current_name
== NULL
)
212 as_bad (_("missing .proc"));
213 ignore_rest_of_line ();
217 current_name
= current_label
= NULL
;
219 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
220 input_line_pointer
++;
227 if (current_name
!= NULL
)
229 as_bad (_(".endfunc missing for previous .proc"));
230 ignore_rest_of_line ();
234 name
= input_line_pointer
;
235 delim1
= get_symbol_end ();
236 name
= xstrdup (name
);
237 *input_line_pointer
= delim1
;
240 if (*input_line_pointer
!= ',')
242 char leading_char
= 0;
244 leading_char
= bfd_get_symbol_leading_char (stdoutput
);
245 /* Missing entry point, use function's name with the leading
249 if (asprintf (&label
, "%c%s", leading_char
, name
))
250 { /* Avoid warning */ }
257 ++input_line_pointer
;
259 label
= input_line_pointer
;
260 delim2
= get_symbol_end ();
261 label
= xstrdup (label
);
262 *input_line_pointer
= delim2
;
266 current_label
= label
;
268 demand_empty_rest_of_line ();
271 /* This function is called once, at assembler startup time. It should
272 set up all the tables, etc., that the MD part of the assembler will
278 const char *retval
= NULL
;
282 /* Create a new hash table. */
283 op_hash
= hash_new ();
285 /* Hash up all the opcodes for fast use later. */
286 for (i
= 0; i
< num_dlx_opcodes
; i
++)
288 const char *name
= machine_opcodes
[i
].name
;
290 retval
= hash_insert (op_hash
, name
, (void *) &machine_opcodes
[i
]);
294 fprintf (stderr
, _("internal error: can't hash `%s': %s\n"),
295 machine_opcodes
[i
].name
, retval
);
301 as_fatal (_("Broken assembler. No assembly attempted."));
306 /* This function will check the opcode and return 1 if the opcode is one
307 of the load/store instruction, and it will fix the operand string to
308 the standard form so we can use the standard parse_operand routine. */
310 #define READ_OP 0x100
311 #define WRITE_OP 0x200
312 static char iBuf
[81];
315 dlx_parse_loadop (char * str
)
320 /* The last pair of ()/[] is the register, all other are the
321 reloc displacement, and if there is a register then it ought
322 to have a pair of ()/[]
323 This is not necessarily true, what if the load instruction come
324 without the register and with %hi/%lo modifier? */
325 for (idx
= 0; idx
< 72 && ptr
[idx
] != '\0'; idx
++)
331 as_bad (_("Bad operand for a load instruction: <%s>"), str
);
338 char rs1
[7], rd
[7], endm
, match
= '0';
353 /* No register indicated, fill in zero. */
364 /* Searching for (/[ which will match the ]/). */
365 for (pb
= idx
- 1; str
[pb
] != match
; pb
-= 1)
366 /* Match can only be either '[' or '(', if it is
367 '(' then this can be a normal expression, we'll treat
369 if (str
[pb
] == endm
|| pb
< (idx
- 5))
373 for (i
= 0; (pb
+ i
) < idx
; i
++)
378 if (is_ldst_registers (& rs1
[0]))
379 /* Point to the last character of the imm. */
385 goto badoperand_load
;
386 /* No register indicated, fill in zero and restore the imm. */
394 /* Duplicate the first register. */
395 for (i
= 0; i
< 7 && str
[i
] != ','; i
++)
399 goto badoperand_load
;
405 /* Put the '\0' back in. */
408 for (i
++, m2
= 0; i
< pb
; m2
++,i
++)
413 /* Assemble the instruction to gas internal format. */
414 for (i
= 0; rd
[i
] != '\0'; i
++)
419 for (pb
= 0 ; rs1
[pb
] != '\0'; i
++, pb
++)
424 for (pb
= 0; imm
[pb
] != '\0'; i
++, pb
++)
433 dlx_parse_storeop (char * str
)
438 /* Search for the ','. */
439 for (idx
= 0; idx
< 72 && ptr
[idx
] != ','; idx
++)
445 as_bad (_("Bad operand for a store instruction: <%s>"), str
);
450 /* idx now points to the ','. */
454 char rs1
[7], rd
[7], endm
, match
= '0';
457 /* Now parse the '(' and ')', and make idx point to ')'. */
470 /* No register indicated, fill in zero. */
481 /* Searching for (/[ which will match the ]/). */
482 for (pb
= idx
- 1; str
[pb
] != match
; pb
-= 1)
483 if (pb
< (idx
- 5) || str
[pb
] == endm
)
487 for (i
= 0; (pb
+ i
) < idx
; i
++)
488 rs1
[i
] = str
[pb
+ i
];
492 if (is_ldst_registers (& rs1
[0]))
493 /* Point to the last character of the imm. */
499 goto badoperand_store
;
501 /* No register indicated, fill in zero and restore the imm. */
509 /* No register was specified. */
512 /* Duplicate the first register. */
513 for (i
= comma
+ 1; (str
[i
] == ' ' || str
[i
] == '\t'); i
++)
516 for (m2
= 0; (m2
< 7 && str
[i
] != '\0'); i
++, m2
++)
518 if (str
[i
] != ' ' && str
[i
] != '\t')
521 goto badoperand_store
;
525 goto badoperand_store
;
530 for (i
= 0; i
< pb
; i
++)
535 /* Assemble the instruction to gas internal format. */
536 for (i
= 0; rd
[i
] != '\0'; i
++)
539 for (pb
= 0 ; rs1
[pb
] != '\0'; i
++, pb
++)
542 for (pb
= 0; imm
[pb
] != '\0'; i
++, pb
++)
550 fix_ld_st_operand (unsigned long opcode
, char* str
)
552 /* Check the opcode. */
553 switch ((int) opcode
)
563 return dlx_parse_loadop (str
);
567 return dlx_parse_storeop (str
);
574 hilo_modifier_ok (char *s
)
582 for (idx
= 1; ptr
[idx
] != '\0' && ptr
[idx
] != '[' && idx
< 73; idx
+= 1)
594 return (count
== 0) ? 1:0;
598 parse_operand (char *s
, expressionS
*operandp
)
600 char *save
= input_line_pointer
;
603 the_insn
.HI
= the_insn
.LO
= 0;
605 /* Search for %hi and %lo, make a mark and skip it. */
606 if (strncmp (s
, "%hi", 3) == 0)
613 if (strncmp (s
, "%lo", 3) == 0)
622 if (the_insn
.HI
|| the_insn
.LO
)
624 if (!hilo_modifier_ok (s
))
625 as_bad (_("Expression Error for operand modifier %%hi/%%lo\n"));
628 /* Check for the % and $ register representation */
629 if ((s
[0] == '%' || s
[0] == '$' || s
[0] == 'r' || s
[0] == 'R')
630 && ISDIGIT ((unsigned char) s
[1]))
632 /* We have a numeric register expression. No biggy. */
634 input_line_pointer
= s
;
635 (void) expression (operandp
);
636 if (operandp
->X_op
!= O_constant
637 || operandp
->X_add_number
> 31)
638 as_bad (_("Invalid expression after %%%%\n"));
639 operandp
->X_op
= O_register
;
643 /* Normal operand parsing. */
644 input_line_pointer
= s
;
645 (void) expression (operandp
);
648 new_pos
= input_line_pointer
;
649 input_line_pointer
= save
;
653 /* Instruction parsing. Takes a string containing the opcode.
654 Operands are at input_line_pointer. Output is in the_insn.
655 Warnings or errors are generated. */
658 machine_ip (char *str
)
662 struct machine_opcode
*insn
;
663 unsigned long opcode
;
664 expressionS the_operand
;
665 expressionS
*operand
= &the_operand
;
666 unsigned int reg
, reg_shift
= 0;
668 /* Fixup the opcode string to all lower cases, and also
669 allow numerical digits. */
673 for (; ISALNUM (*s
); ++s
)
682 /* FIXME-SOMEDAY more whitespace. */
688 as_bad (_("Unknown opcode: `%s'"), str
);
692 /* Hash the opcode, insn will have the string from opcode table.
693 also initialized the_insn struct. */
694 if ((insn
= (struct machine_opcode
*) hash_find (op_hash
, str
)) == NULL
)
696 /* Handle the ret and return macro here. */
697 if ((strcmp (str
, "ret") == 0) || (strcmp (str
, "return") == 0))
699 memset (&the_insn
, '\0', sizeof (the_insn
));
700 the_insn
.reloc
= NO_RELOC
;
703 (unsigned long)(JROP
| 0x03e00000); /* 0x03e00000 = r31 << 21 */
706 as_bad (_("Unknown opcode `%s'."), str
);
711 opcode
= insn
->opcode
;
712 memset (&the_insn
, '\0', sizeof (the_insn
));
713 the_insn
.reloc
= NO_RELOC
;
716 /* Set the sip reloc HI16 flag. */
717 if (!set_dlx_skip_hi16_flag (1))
718 as_bad (_("Can not set dlx_skip_hi16_flag"));
720 /* Fix the operand string if it is one of load store instructions. */
721 s
= fix_ld_st_operand (opcode
, s
);
723 /* Build the opcode, checking as we go to make sure that the
725 If an operand matches, we modify the_insn or opcode appropriately,
726 and do a "continue". If an operand fails to match, we "break". */
727 if (insn
->args
[0] != '\0' && insn
->args
[0] != 'N')
729 /* Prime the pump. */
732 as_bad (_("Missing arguments for opcode <%s>."), str
);
736 s
= parse_operand (s
, operand
);
738 else if (insn
->args
[0] == 'N')
740 /* Clean up the insn and done! */
741 the_insn
.opcode
= opcode
;
745 /* Parse through the args (this is from opcode table), *s point to
746 the current character of the instruction stream. */
747 for (args
= insn
->args
;; ++args
)
756 /* We are truly done. */
757 the_insn
.opcode
= opcode
;
758 /* Clean up the HI and LO mark. */
766 as_bad (_("Too many operands: %s"), s
);
769 /* ',' Args separator */
771 /* Must match a comma. */
774 /* Parse next operand. */
775 s
= parse_operand (s
, operand
);
780 /* It can be a 'a' register or 'i' operand. */
782 /* Macro move operand/reg. */
783 if (operand
->X_op
== O_register
)
785 /* Its a register. */
790 /* The immediate 16 bits literal, bit 0-15. */
792 /* offset, unsigned. */
794 /* offset, signed. */
795 if (operand
->X_op
== O_constant
)
798 operand
->X_add_number
>>= 16;
800 opcode
|= operand
->X_add_number
& 0xFFFF;
802 if (the_insn
.HI
&& the_insn
.LO
)
803 as_bad (_("Both the_insn.HI and the_insn.LO are set : %s"), s
);
812 the_insn
.reloc
= (the_insn
.HI
) ? RELOC_DLX_HI16
813 : (the_insn
.LO
? RELOC_DLX_LO16
: RELOC_DLX_16
);
814 the_insn
.reloc_offset
= 2;
817 the_insn
.exp
= * operand
;
823 /* offset, signed. */
824 if (operand
->X_op
== O_constant
)
826 opcode
|= operand
->X_add_number
& 0xFFFF;
829 the_insn
.reloc
= RELOC_DLX_REL16
;
830 the_insn
.reloc_offset
= 0; /* BIG-ENDIAN Byte 3 of insn. */
833 the_insn
.exp
= *operand
;
836 /* The immediate 26 bits literal, bit 0-25. */
838 /* offset, signed. */
839 if (operand
->X_op
== O_constant
)
841 opcode
|= operand
->X_add_number
& 0x3FFFFFF;
844 the_insn
.reloc
= RELOC_DLX_REL26
;
845 the_insn
.reloc_offset
= 0; /* BIG-ENDIAN Byte 3 of insn. */
848 the_insn
.exp
= *operand
;
851 /* Type 'a' Register. */
853 /* A general register at bits 21-25, rs1. */
857 /* Type 'b' Register. */
859 /* A general register at bits 16-20, rs2/rd. */
863 /* Type 'c' Register. */
865 /* A general register at bits 11-15, rd. */
869 know (operand
->X_add_symbol
== 0);
870 know (operand
->X_op_symbol
== 0);
871 reg
= operand
->X_add_number
;
872 if (reg
& 0xffffffe0)
873 as_fatal (_("failed regnum sanity check."));
875 /* Got the register, now figure out where it goes in the opcode. */
876 opcode
|= reg
<< reg_shift
;
886 as_fatal (_("failed general register sanity check."));
893 /* Types or values of args don't match. */
894 as_bad (_("Invalid operands"));
899 /* Assemble a single instruction. Its label has already been handled
900 by the generic front end. We just parse opcode and operands, and
901 produce the bytes of data and relocation. */
904 md_assemble (char *str
)
913 dwarf2_emit_insn (4);
915 /* Put out the opcode. */
916 md_number_to_chars (toP
, the_insn
.opcode
, 4);
918 /* Put out the symbol-dependent stuff. */
919 if (the_insn
.reloc
!= NO_RELOC
)
921 fixP
= fix_new_exp (frag_now
,
922 (toP
- frag_now
->fr_literal
+ the_insn
.reloc_offset
),
923 the_insn
.size
, & the_insn
.exp
, the_insn
.pcrel
,
926 /* Turn off complaints that the addend is
927 too large for things like foo+100000@ha. */
928 switch (the_insn
.reloc
)
932 fixP
->fx_no_overflow
= 1;
938 switch (fixP
->fx_r_type
)
940 case RELOC_DLX_REL26
:
941 bitP
= malloc (sizeof (bit_fixS
));
942 bitP
->fx_bit_size
= 26;
943 bitP
->fx_bit_offset
= 25;
944 bitP
->fx_bit_base
= the_insn
.opcode
& 0xFC000000;
945 bitP
->fx_bit_base_adj
= 0;
946 bitP
->fx_bit_max
= 0;
947 bitP
->fx_bit_min
= 0;
948 bitP
->fx_bit_add
= 0x03FFFFFF;
949 fixP
->fx_bit_fixP
= bitP
;
952 case RELOC_DLX_REL16
:
953 bitP
= malloc (sizeof (bit_fixS
));
954 bitP
->fx_bit_size
= 16;
955 bitP
->fx_bit_offset
= 15;
956 bitP
->fx_bit_base
= the_insn
.opcode
& 0xFFFF0000;
957 bitP
->fx_bit_base_adj
= 0;
958 bitP
->fx_bit_max
= 0;
959 bitP
->fx_bit_min
= 0;
960 bitP
->fx_bit_add
= 0x0000FFFF;
961 fixP
->fx_bit_fixP
= bitP
;
964 bitP
= malloc (sizeof (bit_fixS
));
965 bitP
->fx_bit_size
= 16;
966 bitP
->fx_bit_offset
= 15;
967 bitP
->fx_bit_base
= the_insn
.opcode
& 0xFFFF0000;
968 bitP
->fx_bit_base_adj
= 0;
969 bitP
->fx_bit_max
= 0;
970 bitP
->fx_bit_min
= 0;
971 bitP
->fx_bit_add
= 0x0000FFFF;
972 fixP
->fx_bit_fixP
= bitP
;
975 fixP
->fx_bit_fixP
= NULL
;
981 /* This is identical to the md_atof in m68k.c. I think this is right,
982 but I'm not sure. Dlx will not use it anyway, so I just leave it
986 md_atof (int type
, char *litP
, int *sizeP
)
988 return ieee_md_atof (type
, litP
, sizeP
, TRUE
);
991 /* Write out big-endian. */
993 md_number_to_chars (char *buf
, valueT val
, int n
)
995 number_to_chars_bigendian (buf
, val
, n
);
999 md_dlx_fix_adjustable (fixS
*fixP
)
1001 /* We need the symbol name for the VTABLE entries. */
1002 return (fixP
->fx_r_type
!= BFD_RELOC_VTABLE_INHERIT
1003 && fixP
->fx_r_type
!= BFD_RELOC_VTABLE_ENTRY
);
1007 md_apply_fix (fixS
*fixP
, valueT
*valP
, segT seg ATTRIBUTE_UNUSED
)
1010 char *place
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
1012 switch (fixP
->fx_r_type
)
1014 case RELOC_DLX_LO16
:
1015 case RELOC_DLX_REL16
:
1016 if (fixP
->fx_bit_fixP
!= NULL
)
1018 val
= (val
& 0x0000FFFF) | fixP
->fx_bit_fixP
->fx_bit_base
;
1019 free (fixP
->fx_bit_fixP
);
1020 fixP
->fx_bit_fixP
= NULL
;
1024 know ((fixP
->fx_bit_fixP
!= NULL
));
1028 case RELOC_DLX_HI16
:
1029 if (fixP
->fx_bit_fixP
!= NULL
)
1031 val
= (val
>> 16) | fixP
->fx_bit_fixP
->fx_bit_base
;
1032 free (fixP
->fx_bit_fixP
);
1033 fixP
->fx_bit_fixP
= NULL
;
1037 know ((fixP
->fx_bit_fixP
!= NULL
));
1041 case RELOC_DLX_REL26
:
1042 if (fixP
->fx_bit_fixP
!= NULL
)
1044 val
= (val
& 0x03FFFFFF) | fixP
->fx_bit_fixP
->fx_bit_base
;
1045 free (fixP
->fx_bit_fixP
);
1046 fixP
->fx_bit_fixP
= NULL
;
1050 know ((fixP
->fx_bit_fixP
!= NULL
));
1054 case BFD_RELOC_VTABLE_INHERIT
:
1055 /* This borrowed from tc-ppc.c on a whim. */
1058 && !S_IS_DEFINED (fixP
->fx_addsy
)
1059 && !S_IS_WEAK (fixP
->fx_addsy
))
1060 S_SET_WEAK (fixP
->fx_addsy
);
1063 case BFD_RELOC_VTABLE_ENTRY
:
1071 number_to_chars_bigendian (place
, val
, fixP
->fx_size
);
1072 if (fixP
->fx_addsy
== NULL
)
1076 const char *md_shortopts
= "";
1078 struct option md_longopts
[] =
1080 {NULL
, no_argument
, NULL
, 0}
1083 size_t md_longopts_size
= sizeof (md_longopts
);
1086 md_parse_option (int c ATTRIBUTE_UNUSED
,
1087 char *arg ATTRIBUTE_UNUSED
)
1093 md_show_usage (FILE *stream ATTRIBUTE_UNUSED
)
1097 /* This is called when a line is unrecognized. */
1100 dlx_unrecognized_line (int c
)
1105 if (c
!= '$' || ! ISDIGIT ((unsigned char) input_line_pointer
[0]))
1108 s
= input_line_pointer
;
1111 while (ISDIGIT ((unsigned char) *s
))
1113 lab
= lab
* 10 + *s
- '0';
1118 /* Not a label definition. */
1121 if (dollar_label_defined (lab
))
1123 as_bad (_("label \"$%d\" redefined"), lab
);
1127 define_dollar_label (lab
);
1128 colon (dollar_label_name (lab
, 0));
1129 input_line_pointer
= s
+ 1;
1134 /* Default the values of symbols known that should be "predefined". We
1135 don't bother to predefine them unless you actually use one, since there
1136 are a lot of them. */
1139 md_undefined_symbol (char *name ATTRIBUTE_UNUSED
)
1144 /* Parse an operand that is machine-specific, the function was called
1145 in expr.c by operand() function, when everything failed before it
1149 md_operand (expressionS
* expressionP
)
1151 /* Check for the #number representation */
1152 if (input_line_pointer
[0] == '#' &&
1153 ISDIGIT ((unsigned char) input_line_pointer
[1]))
1155 /* We have a numeric number expression. No biggy. */
1156 input_line_pointer
+= 1; /* Skip # */
1158 (void) expression (expressionP
);
1160 if (expressionP
->X_op
!= O_constant
)
1161 as_bad (_("Invalid expression after # number\n"));
1167 /* Round up a section size to the appropriate boundary. */
1170 md_section_align (segT segment ATTRIBUTE_UNUSED
,
1173 /* Byte alignment is fine. */
1177 /* Exactly what point is a PC-relative offset relative TO?
1178 On the 29000, they're relative to the address of the instruction,
1179 which we have set up as the address of the fixup too. */
1182 md_pcrel_from (fixS
* fixP
)
1184 return 4 + fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
1187 /* Translate internal representation of relocation info to BFD target
1189 FIXME: To what extent can we get all relevant targets to use this?
1190 The above FIXME is from a29k, but I think it is also needed here. */
1193 tc_gen_reloc (asection
*section ATTRIBUTE_UNUSED
,
1198 reloc
= xmalloc (sizeof (arelent
));
1199 reloc
->howto
= bfd_reloc_type_lookup (stdoutput
, fixP
->fx_r_type
);
1201 if (reloc
->howto
== NULL
)
1203 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1204 _("internal error: can't export reloc type %d (`%s')"),
1206 bfd_get_reloc_code_name (fixP
->fx_r_type
));
1210 gas_assert (!fixP
->fx_pcrel
== !reloc
->howto
->pc_relative
);
1212 reloc
->sym_ptr_ptr
= xmalloc (sizeof (asymbol
*));
1213 *reloc
->sym_ptr_ptr
= symbol_get_bfdsym (fixP
->fx_addsy
);
1214 reloc
->address
= fixP
->fx_frag
->fr_address
+ fixP
->fx_where
;
1216 if (fixP
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
1217 reloc
->address
= fixP
->fx_offset
;
1224 dlx_pseudo_table
[] =
1226 /* Some additional ops that are used by gcc-dlx. */
1227 {"asciiz", stringer
, 8 + 1},
1231 {"proc", s_proc
, 0},
1232 {"endproc", s_proc
, 1},
1237 dlx_pop_insert (void)
1239 pop_insert (dlx_pseudo_table
);