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- /* tc-a29k.c -- Assemble for the AMD 29000.
- Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GAS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* John Gilmore has reorganized this module somewhat, to make it easier
- to convert it to new machines' assemblers as desired. There was too
- much bloody rewriting required before. There still probably is. */
-
- #include "ctype.h"
- #include "as.h"
-
- #include "opcode/a29k.h"
-
- /* Make it easier to clone this machine desc into another one. */
- #define machine_opcode a29k_opcode
- #define machine_opcodes a29k_opcodes
- #define machine_ip a29k_ip
- #define machine_it a29k_it
-
- const relax_typeS md_relax_table[] =
- {0};
-
- #define IMMEDIATE_BIT 0x01000000 /* Turns RB into Immediate */
- #define ABSOLUTE_BIT 0x01000000 /* Turns PC-relative to Absolute */
- #define CE_BIT 0x00800000 /* Coprocessor enable in LOAD */
- #define UI_BIT 0x00000080 /* Unsigned integer in CONVERT */
-
- /* handle of the OPCODE hash table */
- static struct hash_control *op_hash = NULL;
-
- struct machine_it
- {
- char *error;
- unsigned long opcode;
- struct nlist *nlistp;
- expressionS exp;
- int pcrel;
- int reloc_offset; /* Offset of reloc within insn */
-
- int reloc;
-
-
- }
-
- the_insn;
-
- #if __STDC__ == 1
-
- /* static int getExpression(char *str); */
- static void machine_ip (char *str);
- /* static void print_insn(struct machine_it *insn); */
- static void s_data1 (void);
- static void s_use (void);
-
- #else /* not __STDC__ */
-
- /* static int getExpression(); */
- static void machine_ip ();
- /* static void print_insn(); */
- static void s_data1 ();
- static void s_use ();
-
- #endif /* not __STDC__ */
-
- const pseudo_typeS
- md_pseudo_table[] =
- {
- {"align", s_align_bytes, 4},
- {"block", s_space, 0},
- {"cputype", s_ignore, 0}, /* CPU as 29000 or 29050 */
- {"reg", s_lsym, 0}, /* Register equate, same as equ */
- {"space", s_ignore, 0}, /* Listing control */
- {"sect", s_ignore, 0}, /* Creation of coff sections */
- #ifndef OBJ_COFF
- /* We can do this right with coff */
- {"use", s_use, 0},
- #endif
- {"word", cons, 4},
- {NULL, 0, 0},
- };
-
- int md_short_jump_size = 4;
- int md_long_jump_size = 4;
- #if defined(BFD_HEADERS)
- #ifdef RELSZ
- int md_reloc_size = RELSZ; /* Coff headers */
- #else
- int md_reloc_size = 12; /* something else headers */
- #endif
- #else
- int md_reloc_size = 12; /* Not bfdized*/
- #endif
-
- /* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
- const char comment_chars[] = ";";
-
- /* This array holds the chars that only start a comment at the beginning of
- a line. If the line seems to have the form '# 123 filename'
- .line and .file directives will appear in the pre-processed output */
- /* Note that input_file.c hand checks for '#' at the beginning of the
- first line of the input file. This is because the compiler outputs
- #NO_APP at the beginning of its output. */
- /* Also note that comments like this one will always work */
- const char line_comment_chars[] = "#";
-
- /* We needed an unused char for line separation to work around the
- lack of macros, using sed and such. */
- const char line_separator_chars[] = "@";
-
- /* Chars that can be used to separate mant from exp in floating point nums */
- const char EXP_CHARS[] = "eE";
-
- /* Chars that mean this number is a floating point constant */
- /* As in 0f12.456 */
- /* or 0d1.2345e12 */
- const char FLT_CHARS[] = "rRsSfFdDxXpP";
-
- /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
- changed in read.c . Ideally it shouldn't have to know about it at all,
- but nothing is ideal around here.
- */
-
- static unsigned char octal[256];
- #define isoctal(c) octal[c]
- static unsigned char toHex[256];
-
- /*
- * anull bit - causes the branch delay slot instructions to not be executed
- */
- #define ANNUL (1 << 29)
-
- static void
- s_use ()
- {
-
- if (strncmp (input_line_pointer, ".text", 5) == 0)
- {
- input_line_pointer += 5;
- s_text ();
- return;
- }
- if (strncmp (input_line_pointer, ".data", 5) == 0)
- {
- input_line_pointer += 5;
- s_data ();
- return;
- }
- if (strncmp (input_line_pointer, ".data1", 6) == 0)
- {
- input_line_pointer += 6;
- s_data1 ();
- return;
- }
- /* Literals can't go in the text segment because you can't read
- from instruction memory on some 29k's. So, into initialized data. */
- if (strncmp (input_line_pointer, ".lit", 4) == 0)
- {
- input_line_pointer += 4;
- subseg_new (SEG_DATA, 200);
- demand_empty_rest_of_line ();
- return;
- }
-
- as_bad ("Unknown segment type");
- demand_empty_rest_of_line ();
- return;
- }
-
- static void
- s_data1 ()
- {
- subseg_new (SEG_DATA, 1);
- demand_empty_rest_of_line ();
- return;
- }
-
- /* Install symbol definition that maps REGNAME to REGNO.
- FIXME-SOON: These are not recognized in mixed case. */
-
- static void
- insert_sreg (regname, regnum)
- char *regname;
- int regnum;
- {
- /* FIXME-SOON, put something in these syms so they won't be output to the symbol
- table of the resulting object file. */
-
- /* Must be large enough to hold the names of the special registers. */
- char buf[80];
- int i;
-
- symbol_table_insert (symbol_new (regname, SEG_REGISTER, regnum, &zero_address_frag));
- for (i = 0; regname[i]; i++)
- buf[i] = islower (regname[i]) ? toupper (regname[i]) : regname[i];
- buf[i] = '\0';
-
- symbol_table_insert (symbol_new (buf, SEG_REGISTER, regnum, &zero_address_frag));
- } /* insert_sreg() */
-
- /* Install symbol definitions for assorted special registers.
- See ASM29K Ref page 2-9. */
-
- void
- define_some_regs ()
- {
- #define SREG 256
-
- /* Protected special-purpose register names */
- insert_sreg ("vab", SREG + 0);
- insert_sreg ("ops", SREG + 1);
- insert_sreg ("cps", SREG + 2);
- insert_sreg ("cfg", SREG + 3);
- insert_sreg ("cha", SREG + 4);
- insert_sreg ("chd", SREG + 5);
- insert_sreg ("chc", SREG + 6);
- insert_sreg ("rbp", SREG + 7);
- insert_sreg ("tmc", SREG + 8);
- insert_sreg ("tmr", SREG + 9);
- insert_sreg ("pc0", SREG + 10);
- insert_sreg ("pc1", SREG + 11);
- insert_sreg ("pc2", SREG + 12);
- insert_sreg ("mmu", SREG + 13);
- insert_sreg ("lru", SREG + 14);
-
- /* Additional protected special-purpose registers for the 29050 */
- insert_sreg ("rsn", SREG + 15);
- insert_sreg ("rma0", SREG + 16);
- insert_sreg ("rmc0", SREG + 17);
- insert_sreg ("rma1", SREG + 18);
- insert_sreg ("rmc1", SREG + 19);
- insert_sreg ("spc0", SREG + 20);
- insert_sreg ("spc1", SREG + 21);
- insert_sreg ("spc2", SREG + 22);
- insert_sreg ("iba0", SREG + 23);
- insert_sreg ("ibc0", SREG + 24);
- insert_sreg ("iba1", SREG + 25);
- insert_sreg ("ibc1", SREG + 26);
-
- /* Unprotected special-purpose register names */
- insert_sreg ("ipc", SREG + 128);
- insert_sreg ("ipa", SREG + 129);
- insert_sreg ("ipb", SREG + 130);
- insert_sreg ("q", SREG + 131);
- insert_sreg ("alu", SREG + 132);
- insert_sreg ("bp", SREG + 133);
- insert_sreg ("fc", SREG + 134);
- insert_sreg ("cr", SREG + 135);
- insert_sreg ("fpe", SREG + 160);
- insert_sreg ("inte", SREG + 161);
- insert_sreg ("fps", SREG + 162);
- /* "", SREG+163); Reserved */
- insert_sreg ("exop", SREG + 164);
- } /* define_some_regs() */
-
- /* This function is called once, at assembler startup time. It should
- set up all the tables, etc. that the MD part of the assembler will need. */
- void
- md_begin ()
- {
- register char *retval = NULL;
- int lose = 0;
- register int skipnext = 0;
- register unsigned int i;
- register char *strend, *strend2;
-
- /* Hash up all the opcodes for fast use later. */
-
- op_hash = hash_new ();
- if (op_hash == NULL)
- as_fatal ("Virtual memory exhausted");
-
- for (i = 0; i < num_opcodes; i++)
- {
- const char *name = machine_opcodes[i].name;
-
- if (skipnext)
- {
- skipnext = 0;
- continue;
- }
-
- /* Hack to avoid multiple opcode entries. We pre-locate all the
- variations (b/i field and P/A field) and handle them. */
-
- if (!strcmp (name, machine_opcodes[i + 1].name))
- {
- if ((machine_opcodes[i].opcode ^ machine_opcodes[i + 1].opcode)
- != 0x01000000)
- goto bad_table;
- strend = machine_opcodes[i].args + strlen (machine_opcodes[i].args) - 1;
- strend2 = machine_opcodes[i + 1].args + strlen (machine_opcodes[i + 1].args) - 1;
- switch (*strend)
- {
- case 'b':
- if (*strend2 != 'i')
- goto bad_table;
- break;
- case 'i':
- if (*strend2 != 'b')
- goto bad_table;
- break;
- case 'P':
- if (*strend2 != 'A')
- goto bad_table;
- break;
- case 'A':
- if (*strend2 != 'P')
- goto bad_table;
- break;
- default:
- bad_table:
- fprintf (stderr, "internal error: can't handle opcode %s\n", name);
- lose = 1;
- }
-
- /* OK, this is an i/b or A/P pair. We skip the higher-valued one,
- and let the code for operand checking handle OR-ing in the bit. */
- if (machine_opcodes[i].opcode & 1)
- continue;
- else
- skipnext = 1;
- }
-
- retval = hash_insert (op_hash, name, &machine_opcodes[i]);
- if (retval != NULL && *retval != '\0')
- {
- fprintf (stderr, "internal error: can't hash `%s': %s\n",
- machine_opcodes[i].name, retval);
- lose = 1;
- }
- }
-
- if (lose)
- as_fatal ("Broken assembler. No assembly attempted.");
-
- for (i = '0'; i < '8'; ++i)
- octal[i] = 1;
- for (i = '0'; i <= '9'; ++i)
- toHex[i] = i - '0';
- for (i = 'a'; i <= 'f'; ++i)
- toHex[i] = i + 10 - 'a';
- for (i = 'A'; i <= 'F'; ++i)
- toHex[i] = i + 10 - 'A';
-
- define_some_regs ();
- }
-
- void
- md_end ()
- {
- return;
- }
-
- /* Assemble a single instruction. Its label has already been handled
- by the generic front end. We just parse opcode and operands, and
- produce the bytes of data and relocation. */
-
- void
- md_assemble (str)
- char *str;
- {
- char *toP;
- /* !!!! int rsd; */
-
- know (str);
- machine_ip (str);
- toP = frag_more (4);
- /* put out the opcode */
- md_number_to_chars (toP, the_insn.opcode, 4);
-
- /* put out the symbol-dependent stuff */
- if (the_insn.reloc != NO_RELOC)
- {
- fix_new (
- frag_now, /* which frag */
- (toP - frag_now->fr_literal + the_insn.reloc_offset), /* where */
- 4, /* size */
- the_insn.exp.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- the_insn.pcrel,
- the_insn.reloc
- );
- }
- }
-
- char *
- parse_operand (s, operandp)
- char *s;
- expressionS *operandp;
- {
- char *save = input_line_pointer;
- char *new;
- segT seg;
-
- input_line_pointer = s;
- seg = expr (0, operandp);
- new = input_line_pointer;
- input_line_pointer = save;
-
- if (seg == SEG_ABSENT)
- as_bad ("Missing operand");
- return new;
- }
-
- /* Instruction parsing. Takes a string containing the opcode.
- Operands are at input_line_pointer. Output is in the_insn.
- Warnings or errors are generated. */
-
- static void
- machine_ip (str)
- char *str;
- {
- char *s;
- const char *args;
- /* !!!! char c; */
- /* !!!! unsigned long i; */
- struct machine_opcode *insn;
- char *argsStart;
- unsigned long opcode;
- /* !!!! unsigned int mask; */
- expressionS the_operand;
- expressionS *operand = &the_operand;
- unsigned int reg;
-
- /* Must handle `div0' opcode. */
- s = str;
- if (isalpha (*s))
- for (; isalnum (*s); ++s)
- if (isupper (*s))
- *s = tolower (*s);
-
- switch (*s)
- {
- case '\0':
- break;
-
- case ' ': /* FIXME-SOMEDAY more whitespace */
- *s++ = '\0';
- break;
-
- default:
- as_bad ("Unknown opcode: `%s'", str);
- return;
- }
- if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
- {
- as_bad ("Unknown opcode `%s'.", str);
- return;
- }
- argsStart = s;
- opcode = insn->opcode;
- memset (&the_insn, '\0', sizeof (the_insn));
- the_insn.reloc = NO_RELOC;
-
- /*
- * Build the opcode, checking as we go to make
- * sure that the operands match.
- *
- * If an operand matches, we modify the_insn or opcode appropriately,
- * and do a "continue". If an operand fails to match, we "break".
- */
- if (insn->args[0] != '\0')
- s = parse_operand (s, operand); /* Prime the pump */
-
- for (args = insn->args;; ++args)
- {
- switch (*args)
- {
-
- case '\0': /* end of args */
- if (*s == '\0')
- {
- /* We are truly done. */
- the_insn.opcode = opcode;
- return;
- }
- as_bad ("Too many operands: %s", s);
- break;
-
- case ',': /* Must match a comma */
- if (*s++ == ',')
- {
- s = parse_operand (s, operand); /* Parse next opnd */
- continue;
- }
- break;
-
- case 'v': /* Trap numbers (immediate field) */
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- if (operand->X_add_number < 256)
- {
- opcode |= (operand->X_add_number << 16);
- continue;
- }
- else
- {
- as_bad ("Immediate value of %d is too large",
- operand->X_add_number);
- continue;
- }
- }
- the_insn.reloc = RELOC_8;
- the_insn.reloc_offset = 1; /* BIG-ENDIAN Byte 1 of insn */
- the_insn.exp = *operand;
- continue;
-
- case 'b': /* A general register or 8-bit immediate */
- case 'i':
- /* We treat the two cases identically since we mashed
- them together in the opcode table. */
- if (operand->X_seg == SEG_REGISTER)
- goto general_reg;
-
- opcode |= IMMEDIATE_BIT;
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- if (operand->X_add_number < 256)
- {
- opcode |= operand->X_add_number;
- continue;
- }
- else
- {
- as_bad ("Immediate value of %d is too large",
- operand->X_add_number);
- continue;
- }
- }
- the_insn.reloc = RELOC_8;
- the_insn.reloc_offset = 3; /* BIG-ENDIAN Byte 3 of insn */
- the_insn.exp = *operand;
- continue;
-
- case 'a': /* next operand must be a register */
- case 'c':
- general_reg:
- /* lrNNN or grNNN or %%expr or a user-def register name */
- if (operand->X_seg != SEG_REGISTER)
- break; /* Only registers */
- know (operand->X_add_symbol == 0);
- know (operand->X_subtract_symbol == 0);
- reg = operand->X_add_number;
- if (reg >= SREG)
- break; /* No special registers */
-
- /*
- * Got the register, now figure out where
- * it goes in the opcode.
- */
- switch (*args)
- {
- case 'a':
- opcode |= reg << 8;
- continue;
-
- case 'b':
- case 'i':
- opcode |= reg;
- continue;
-
- case 'c':
- opcode |= reg << 16;
- continue;
- }
- as_fatal ("failed sanity check.");
- break;
-
- case 'x': /* 16 bit constant, zero-extended */
- case 'X': /* 16 bit constant, one-extended */
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- opcode |= (operand->X_add_number & 0xFF) << 0 |
- ((operand->X_add_number & 0xFF00) << 8);
- continue;
- }
- the_insn.reloc = RELOC_CONST;
- the_insn.exp = *operand;
- continue;
-
- case 'h':
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- opcode |= (operand->X_add_number & 0x00FF0000) >> 16 |
- (((unsigned long) operand->X_add_number
- /* avoid sign ext */ & 0xFF000000) >> 8);
- continue;
- }
- the_insn.reloc = RELOC_CONSTH;
- the_insn.exp = *operand;
- continue;
-
- case 'P': /* PC-relative jump address */
- case 'A': /* Absolute jump address */
- /* These two are treated together since we folded the
- opcode table entries together. */
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- opcode |= ABSOLUTE_BIT |
- (operand->X_add_number & 0x0003FC00) << 6 |
- ((operand->X_add_number & 0x000003FC) >> 2);
- continue;
- }
- the_insn.reloc = RELOC_JUMPTARG;
- the_insn.exp = *operand;
- the_insn.pcrel = 1; /* Assume PC-relative jump */
- /* FIXME-SOON, Do we figure out whether abs later, after know sym val? */
- continue;
-
- case 'e': /* Coprocessor enable bit for LOAD/STORE insn */
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- if (operand->X_add_number == 0)
- continue;
- if (operand->X_add_number == 1)
- {
- opcode |= CE_BIT;
- continue;
- }
- }
- break;
-
- case 'n': /* Control bits for LOAD/STORE instructions */
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 128)
- {
- opcode |= (operand->X_add_number << 16);
- continue;
- }
- break;
-
- case 's': /* Special register number */
- if (operand->X_seg != SEG_REGISTER)
- break; /* Only registers */
- if (operand->X_add_number < SREG)
- break; /* Not a special register */
- opcode |= (operand->X_add_number & 0xFF) << 8;
- continue;
-
- case 'u': /* UI bit of CONVERT */
- if (operand->X_seg == SEG_ABSOLUTE)
- {
- if (operand->X_add_number == 0)
- continue;
- if (operand->X_add_number == 1)
- {
- opcode |= UI_BIT;
- continue;
- }
- }
- break;
-
- case 'r': /* RND bits of CONVERT */
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 8)
- {
- opcode |= operand->X_add_number << 4;
- continue;
- }
- break;
-
- case 'd': /* FD bits of CONVERT */
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 4)
- {
- opcode |= operand->X_add_number << 2;
- continue;
- }
- break;
-
-
- case 'f': /* FS bits of CONVERT */
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 4)
- {
- opcode |= operand->X_add_number << 0;
- continue;
- }
- break;
-
- case 'C':
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 4)
- {
- opcode |= operand->X_add_number << 16;
- continue;
- }
- break;
-
- case 'F':
- if (operand->X_seg == SEG_ABSOLUTE &&
- operand->X_add_number < 16)
- {
- opcode |= operand->X_add_number << 18;
- continue;
- }
- break;
-
- default:
- BAD_CASE (*args);
- }
- /* Types or values of args don't match. */
- as_bad ("Invalid operands");
- return;
- }
- }
-
- /*
- This is identical to the md_atof in m68k.c. I think this is right,
- but I'm not sure.
-
- Turn a string in input_line_pointer into a floating point constant of type
- type, and store the appropriate bytes in *litP. The number of LITTLENUMS
- emitted is stored in *sizeP . An error message is returned, or NULL on OK.
- */
-
- /* Equal to MAX_PRECISION in atof-ieee.c */
- #define MAX_LITTLENUMS 6
-
- char *
- md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
- {
- int prec;
- LITTLENUM_TYPE words[MAX_LITTLENUMS];
- LITTLENUM_TYPE *wordP;
- char *t;
-
- switch (type)
- {
-
- case 'f':
- case 'F':
- case 's':
- case 'S':
- prec = 2;
- break;
-
- case 'd':
- case 'D':
- case 'r':
- case 'R':
- prec = 4;
- break;
-
- case 'x':
- case 'X':
- prec = 6;
- break;
-
- case 'p':
- case 'P':
- prec = 6;
- break;
-
- default:
- *sizeP = 0;
- return "Bad call to MD_ATOF()";
- }
- t = atof_ieee (input_line_pointer, type, words);
- if (t)
- input_line_pointer = t;
- *sizeP = prec * sizeof (LITTLENUM_TYPE);
- for (wordP = words; prec--;)
- {
- md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
- return ""; /* Someone should teach Dean about null pointers */
- }
-
- /*
- * Write out big-endian.
- */
- void
- md_number_to_chars (buf, val, n)
- char *buf;
- long val;
- int n;
- {
-
- switch (n)
- {
-
- case 4:
- *buf++ = val >> 24;
- *buf++ = val >> 16;
- case 2:
- *buf++ = val >> 8;
- case 1:
- *buf = val;
- break;
-
- default:
- as_fatal ("failed sanity check.");
- }
- return;
- }
-
- void
- md_apply_fix (fixP, val)
- fixS *fixP;
- long val;
- {
- char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
-
- fixP->fx_addnumber = val; /* Remember value for emit_reloc */
-
-
- know (fixP->fx_size == 4);
- know (fixP->fx_r_type < NO_RELOC);
-
- /*
- * This is a hack. There should be a better way to
- * handle this.
- */
- if (fixP->fx_r_type == RELOC_WDISP30 && fixP->fx_addsy)
- {
- val += fixP->fx_where + fixP->fx_frag->fr_address;
- }
-
- switch (fixP->fx_r_type)
- {
-
- case RELOC_32:
- buf[0] = val >> 24;
- buf[1] = val >> 16;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- case RELOC_8:
- buf[0] = val;
- break;
-
- case RELOC_WDISP30:
- val = (val >>= 2) + 1;
- buf[0] |= (val >> 24) & 0x3f;
- buf[1] = (val >> 16);
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- case RELOC_HI22:
- buf[1] |= (val >> 26) & 0x3f;
- buf[2] = val >> 18;
- buf[3] = val >> 10;
- break;
-
- case RELOC_LO10:
- buf[2] |= (val >> 8) & 0x03;
- buf[3] = val;
- break;
-
- case RELOC_BASE13:
- buf[2] |= (val >> 8) & 0x1f;
- buf[3] = val;
- break;
-
- case RELOC_WDISP22:
- val = (val >>= 2) + 1;
- /* FALLTHROUGH */
- case RELOC_BASE22:
- buf[1] |= (val >> 16) & 0x3f;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- #if 0
- case RELOC_PC10:
- case RELOC_PC22:
- case RELOC_JMP_TBL:
- case RELOC_SEGOFF16:
- case RELOC_GLOB_DAT:
- case RELOC_JMP_SLOT:
- case RELOC_RELATIVE:
- #endif
- case RELOC_JUMPTARG: /* 00XX00XX pattern in a word */
- buf[1] = val >> 10; /* Holds bits 0003FFFC of address */
- buf[3] = val >> 2;
- break;
-
- case RELOC_CONST: /* 00XX00XX pattern in a word */
- buf[1] = val >> 8; /* Holds bits 0000XXXX */
- buf[3] = val;
- break;
-
- case RELOC_CONSTH: /* 00XX00XX pattern in a word */
- buf[1] = val >> 24; /* Holds bits XXXX0000 */
- buf[3] = val >> 16;
- break;
-
- case NO_RELOC:
- default:
- as_bad ("bad relocation type: 0x%02x", fixP->fx_r_type);
- break;
- }
- return;
- }
-
- #ifdef OBJ_COFF
- short
- tc_coff_fix2rtype (fixP)
- fixS *fixP;
- {
-
- switch (fixP->fx_r_type)
- {
- case RELOC_32:
- return (R_WORD);
- case RELOC_8:
- return (R_BYTE);
- case RELOC_CONST:
- return (R_ILOHALF);
- case RELOC_CONSTH:
- return (R_IHIHALF);
- case RELOC_JUMPTARG:
- return (R_IREL);
- default:
- printf ("need %o3\n", fixP->fx_r_type);
- abort ();
- } /* switch on type */
-
- return (0);
- } /* tc_coff_fix2rtype() */
-
- #endif /* OBJ_COFF */
-
- /* should never be called for sparc */
- void
- md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr, to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- as_fatal ("a29k_create_short_jmp\n");
- }
-
- /* should never be called for 29k */
- void
- md_convert_frag (headers, fragP)
- object_headers *headers;
- register fragS *fragP;
- {
- as_fatal ("sparc_convert_frag\n");
- }
-
- /* should never be called for 29k */
- void
- md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr;
- long to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- as_fatal ("sparc_create_long_jump\n");
- }
-
- /* should never be called for a29k */
- int
- md_estimate_size_before_relax (fragP, segtype)
- register fragS *fragP;
- segT segtype;
- {
- as_fatal ("sparc_estimate_size_before_relax\n");
- return (0);
- }
-
- #if 0
- /* for debugging only */
- static void
- print_insn (insn)
- struct machine_it *insn;
- {
- char *Reloc[] =
- {
- "RELOC_8",
- "RELOC_16",
- "RELOC_32",
- "RELOC_DISP8",
- "RELOC_DISP16",
- "RELOC_DISP32",
- "RELOC_WDISP30",
- "RELOC_WDISP22",
- "RELOC_HI22",
- "RELOC_22",
- "RELOC_13",
- "RELOC_LO10",
- "RELOC_SFA_BASE",
- "RELOC_SFA_OFF13",
- "RELOC_BASE10",
- "RELOC_BASE13",
- "RELOC_BASE22",
- "RELOC_PC10",
- "RELOC_PC22",
- "RELOC_JMP_TBL",
- "RELOC_SEGOFF16",
- "RELOC_GLOB_DAT",
- "RELOC_JMP_SLOT",
- "RELOC_RELATIVE",
- "NO_RELOC"
- };
-
- if (insn->error)
- {
- fprintf (stderr, "ERROR: %s\n");
- }
- fprintf (stderr, "opcode=0x%08x\n", insn->opcode);
- fprintf (stderr, "reloc = %s\n", Reloc[insn->reloc]);
- fprintf (stderr, "exp = {\n");
- fprintf (stderr, "\t\tX_add_symbol = %s\n",
- insn->exp.X_add_symbol ?
- (S_GET_NAME (insn->exp.X_add_symbol) ?
- S_GET_NAME (insn->exp.X_add_symbol) : "???") : "0");
- fprintf (stderr, "\t\tX_sub_symbol = %s\n",
- insn->exp.X_subtract_symbol ?
- (S_GET_NAME (insn->exp.X_subtract_symbol) ?
- S_GET_NAME (insn->exp.X_subtract_symbol) : "???") : "0");
- fprintf (stderr, "\t\tX_add_number = %d\n",
- insn->exp.X_add_number);
- fprintf (stderr, "}\n");
- return;
- }
-
- #endif
-
- /* Translate internal representation of relocation info to target format.
-
- On sparc/29k: first 4 bytes are normal unsigned long address, next three
- bytes are index, most sig. byte first. Byte 7 is broken up with
- bit 7 as external, bits 6 & 5 unused, and the lower
- five bits as relocation type. Next 4 bytes are long addend. */
- /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
-
- #ifdef OBJ_AOUT
-
- void
- tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
- char *where;
- fixS *fixP;
- relax_addressT segment_address_in_file;
- {
- long r_symbolnum;
-
- know (fixP->fx_r_type < NO_RELOC);
- know (fixP->fx_addsy != NULL);
-
- md_number_to_chars (where,
- fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
- 4);
-
- r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy)
- ? S_GET_TYPE (fixP->fx_addsy)
- : fixP->fx_addsy->sy_number);
-
- where[4] = (r_symbolnum >> 16) & 0x0ff;
- where[5] = (r_symbolnum >> 8) & 0x0ff;
- where[6] = r_symbolnum & 0x0ff;
- where[7] = (((!S_IS_DEFINED (fixP->fx_addsy)) << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F);
- /* Also easy */
- md_number_to_chars (&where[8], fixP->fx_addnumber, 4);
-
- return;
- } /* tc_aout_fix_to_chars() */
-
- #endif /* OBJ_AOUT */
-
- int
- md_parse_option (argP, cntP, vecP)
- char **argP;
- int *cntP;
- char ***vecP;
- {
- return (0);
- }
-
-
- /* Default the values of symbols known that should be "predefined". We
- don't bother to predefine them unless you actually use one, since there
- are a lot of them. */
-
- symbolS *
- md_undefined_symbol (name)
- char *name;
- {
- long regnum;
- char testbuf[5 + /*SLOP*/ 5];
-
- if (name[0] == 'g' || name[0] == 'G' || name[0] == 'l' || name[0] == 'L')
- {
- /* Perhaps a global or local register name */
- if (name[1] == 'r' || name[1] == 'R')
- {
- /* Parse the number, make sure it has no extra zeroes or trailing
- chars */
- regnum = atol (&name[2]);
- if (regnum > 127)
- return 0;
- sprintf (testbuf, "%ld", regnum);
- if (strcmp (testbuf, &name[2]) != 0)
- return 0; /* gr007 or lr7foo or whatever */
-
- /* We have a wiener! Define and return a new symbol for it. */
- if (name[0] == 'l' || name[0] == 'L')
- regnum += 128;
- return (symbol_new (name, SEG_REGISTER, regnum, &zero_address_frag));
- }
- }
-
- return 0;
- }
-
- /* Parse an operand that is machine-specific. */
-
- void
- md_operand (expressionP)
- expressionS *expressionP;
- {
-
- if (input_line_pointer[0] == '%' && input_line_pointer[1] == '%')
- {
- /* We have a numeric register expression. No biggy. */
- input_line_pointer += 2; /* Skip %% */
- (void) expression (expressionP);
- if (expressionP->X_seg != SEG_ABSOLUTE
- || expressionP->X_add_number > 255)
- as_bad ("Invalid expression after %%%%\n");
- expressionP->X_seg = SEG_REGISTER;
- }
- else if (input_line_pointer[0] == '&')
- {
- /* We are taking the 'address' of a register...this one is not
- in the manual, but it *is* in traps/fpsymbol.h! What they
- seem to want is the register number, as an absolute number. */
- input_line_pointer++; /* Skip & */
- (void) expression (expressionP);
- if (expressionP->X_seg != SEG_REGISTER)
- as_bad ("Invalid register in & expression");
- else
- expressionP->X_seg = SEG_ABSOLUTE;
- }
- }
-
- /* Round up a section size to the appropriate boundary. */
- long
- md_section_align (segment, size)
- segT segment;
- long size;
- {
- return size; /* Byte alignment is fine */
- }
-
- /* Exactly what point is a PC-relative offset relative TO?
- On the 29000, they're relative to the address of the instruction,
- which we have set up as the address of the fixup too. */
- long
- md_pcrel_from (fixP)
- fixS *fixP;
- {
- return fixP->fx_where + fixP->fx_frag->fr_address;
- }
-
- /*
- * Local Variables:
- * comment-column: 0
- * End:
- */
-
- /* end of tc-a29k.c */
-