/* i860.c -- Assemble for the I860 Copyright (C) 1989 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. */ #include "as.h" #include "opcode/i860.h" /* incorporated from i860.h */ enum reloc_type /* NOTE: three bits max, see struct reloc_info_i860.r_type */ { NO_RELOC = 0, BRADDR, LOW0, LOW1, LOW2, LOW3, LOW4, SPLIT0, SPLIT1, SPLIT2, RELOC_32, }; enum highlow_type /* NOTE: two bits max, see reloc_info_i860.r_type */ { NO_SPEC = 0, PAIR, HIGH, HIGHADJ, }; struct reloc_info_i860 { unsigned long r_address; /* * Using bit fields here is a bad idea because the order is not portable. :-( */ unsigned int r_symbolnum: 24; unsigned int r_pcrel : 1; unsigned int r_extern : 1; /* combining the two field simplifies the argument passing in "new_fix()" */ /* and is compatible with the existing Sparc #ifdef's */ /* r_type: highlow_type - bits 5,4; reloc_type - bits 3-0 */ unsigned int r_type : 6; long r_addend; }; #define relocation_info reloc_info_i860 void md_begin(); void md_end(); void md_number_to_chars(); void md_assemble(); char *md_atof(); void md_convert_frag(); void md_create_short_jump(); void md_create_long_jump(); int md_estimate_size_before_relax(); void md_number_to_imm(); void md_number_to_disp(); void md_number_to_field(); void md_ri_to_chars(); static void i860_ip(); void emit_machine_reloc(); int md_reloc_size = sizeof(struct relocation_info); void (*md_emit_relocations)() = emit_machine_reloc; const relax_typeS md_relax_table[] = { 0 }; /* handle of the OPCODE hash table */ static struct hash_control *op_hash = NULL; static void s_dual(), s_enddual(); static void s_atmp(); const pseudo_typeS md_pseudo_table[] = { { "dual", s_dual, 4 }, { "enddual", s_enddual, 4 }, { "atmp", s_atmp, 4 }, { NULL, 0, 0 }, }; int md_short_jump_size = 4; int md_long_jump_size = 4; /* This array holds the chars that always start a comment. If the pre-processor is disabled, these aren't very useful */ char comment_chars[] = "!/"; /* JF removed '|' from 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. */ char line_comment_chars[] = "#/"; /* Chars that can be used to separate mant from exp in floating point nums */ char EXP_CHARS[] = "eE"; /* Chars that mean this number is a floating point constant */ /* As in 0f12.456 */ /* or 0d1.2345e12 */ 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. */ int size_reloc_info = sizeof(struct relocation_info); static unsigned char octal[256]; #define isoctal(c) octal[c] static unsigned char toHex[256]; struct i860_it { char *error; unsigned long opcode; struct nlist *nlistp; expressionS exp; int pcrel; enum expand_type expand; enum highlow_type highlow; enum reloc_type reloc; } the_insn; #ifdef __STDC__ static void print_insn(struct i860_it *insn); static int getExpression(char *str); #else static void print_insn(); static int getExpression(); #endif static char *expr_end; static char last_expand; /* error if expansion after branch */ enum dual { DUAL_OFF = 0, DUAL_ON, DUAL_DDOT, DUAL_ONDDOT, }; static enum dual dual_mode = DUAL_OFF; /* dual-instruction mode */ static void s_dual() /* floating point instructions have dual set */ { dual_mode = DUAL_ON; } static void s_enddual() /* floating point instructions have dual set */ { dual_mode = DUAL_OFF; } static int atmp = 31; /* temporary register for pseudo's */ static void s_atmp() { register int temp; if (strncmp(input_line_pointer, "sp", 2) == 0) { input_line_pointer += 2; atmp = 2; } else if (strncmp(input_line_pointer, "fp", 2) == 0) { input_line_pointer += 2; atmp = 3; } else if (strncmp(input_line_pointer, "r", 1) == 0) { input_line_pointer += 1; temp = get_absolute_expression(); if (temp >= 0 && temp <= 31) atmp = temp; else as_bad("Unknown temporary pseudo register"); } else { as_bad("Unknown temporary pseudo register"); } demand_empty_rest_of_line(); return; } /* 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 unsigned int i = 0; op_hash = hash_new(); if (op_hash == NULL) as_fatal("Virtual memory exhausted"); while (i < NUMOPCODES) { const char *name = i860_opcodes[i].name; retval = hash_insert(op_hash, name, &i860_opcodes[i]); if(retval != NULL && *retval != '\0') { fprintf (stderr, "internal error: can't hash `%s': %s\n", i860_opcodes[i].name, retval); lose = 1; } do { if (i860_opcodes[i].match & i860_opcodes[i].lose) { fprintf (stderr, "internal error: losing opcode: `%s' \"%s\"\n", i860_opcodes[i].name, i860_opcodes[i].args); lose = 1; } ++i; } while (i < NUMOPCODES && !strcmp(i860_opcodes[i].name, name)); } 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'; } void md_end() { return; } void md_assemble(str) char *str; { char *toP; int rsd; int no_opcodes = 1; int i; struct i860_it pseudo[3]; assert(str); i860_ip(str); /* check for expandable flag to produce pseudo-instructions */ if (the_insn.expand != 0 && the_insn.highlow == NO_SPEC) { for (i = 0; i < 3; i++) pseudo[i] = the_insn; switch (the_insn.expand) { case E_DELAY: no_opcodes = 1; break; case E_MOV: if (the_insn.exp.X_add_symbol == NULL && the_insn.exp.X_subtract_symbol == NULL && (the_insn.exp.X_add_number < (1 << 15) && the_insn.exp.X_add_number >= -(1 << 15))) break; /* or l%const,r0,ireg_dest */ pseudo[0].opcode = (the_insn.opcode & 0x001f0000) | 0xe4000000; pseudo[0].highlow = PAIR; /* orh h%const,ireg_dest,ireg_dest */ pseudo[1].opcode = (the_insn.opcode & 0x03ffffff) | 0xec000000 | ((the_insn.opcode & 0x001f0000) << 5); pseudo[1].highlow = HIGH; no_opcodes = 2; break; case E_ADDR: if (the_insn.exp.X_add_symbol == NULL && the_insn.exp.X_subtract_symbol == NULL) break; /* orh ha%addr_expr,r0,r31 */ pseudo[0].opcode = 0xec000000 | (atmp<<16); pseudo[0].highlow = HIGHADJ; pseudo[0].reloc = LOW0; /* must overwrite */ /* l%addr_expr(r31),ireg_dest */ pseudo[1].opcode = (the_insn.opcode & ~0x003e0000) | (atmp << 21); pseudo[1].highlow = PAIR; no_opcodes = 2; break; case E_U32: /* 2nd version emulates Intel as, not doc. */ if (the_insn.exp.X_add_symbol == NULL && the_insn.exp.X_subtract_symbol == NULL && (the_insn.exp.X_add_number < (1 << 16) && the_insn.exp.X_add_number >= 0)) break; /* $(opcode)h h%const,ireg_src2,ireg_dest pseudo[0].opcode = (the_insn.opcode & 0xf3ffffff) | 0x0c000000; */ /* $(opcode)h h%const,ireg_src2,r31 */ pseudo[0].opcode = (the_insn.opcode & 0xf3e0ffff) | 0x0c000000 | (atmp << 16); pseudo[0].highlow = HIGH; /* $(opcode) l%const,ireg_dest,ireg_dest pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 | ((the_insn.opcode & 0x001f0000) << 5); */ /* $(opcode) l%const,r31,ireg_dest */ pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 | (atmp << 21); pseudo[1].highlow = PAIR; no_opcodes = 2; break; case E_AND: /* 2nd version emulates Intel as, not doc. */ if (the_insn.exp.X_add_symbol == NULL && the_insn.exp.X_subtract_symbol == NULL && (the_insn.exp.X_add_number < (1 << 16) && the_insn.exp.X_add_number >= 0)) break; /* andnot h%const,ireg_src2,ireg_dest pseudo[0].opcode = (the_insn.opcode & 0x03ffffff) | 0xd4000000; */ /* andnot h%const,ireg_src2,r31 */ pseudo[0].opcode = (the_insn.opcode & 0x03e0ffff) | 0xd4000000 | (atmp << 16); pseudo[0].highlow = HIGH; pseudo[0].exp.X_add_number = -1 - the_insn.exp.X_add_number; /* andnot l%const,ireg_dest,ireg_dest pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 | ((the_insn.opcode & 0x001f0000) << 5); */ /* andnot l%const,r31,ireg_dest */ pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 | (atmp << 21); pseudo[1].highlow = PAIR; pseudo[1].exp.X_add_number = -1 - the_insn.exp.X_add_number; no_opcodes = 2; break; case E_S32: if (the_insn.exp.X_add_symbol == NULL && the_insn.exp.X_subtract_symbol == NULL && (the_insn.exp.X_add_number < (1 << 15) && the_insn.exp.X_add_number >= -(1 << 15))) break; /* orh h%const,r0,r31 */ pseudo[0].opcode = 0xec000000 | (atmp << 16); pseudo[0].highlow = HIGH; /* or l%const,r31,r31 */ pseudo[1].opcode = 0xe4000000 | (atmp << 21) | (atmp << 16); pseudo[1].highlow = PAIR; /* r31,ireg_src2,ireg_dest */ pseudo[2].opcode = (the_insn.opcode & ~0x0400ffff) | (atmp << 11); pseudo[2].reloc = NO_RELOC; no_opcodes = 3; break; default: as_fatal("failed sanity check."); } the_insn = pseudo[0]; /* check for expanded opcode after branch or in dual */ if (no_opcodes > 1 && last_expand == 1) as_warn("Expanded opcode after delayed branch: `%s'", str); if (no_opcodes > 1 && dual_mode != DUAL_OFF) as_warn("Expanded opcode in dual mode: `%s'", str); } i = 0; do { /* always produce at least one opcode */ toP = frag_more(4); /* put out the opcode */ md_number_to_chars(toP, the_insn.opcode, 4); /* check for expanded opcode after branch or in dual */ last_expand = the_insn.pcrel; /* put out the symbol-dependent stuff */ if (the_insn.reloc != NO_RELOC) { fix_new( frag_now, /* which frag */ (toP - frag_now->fr_literal), /* where */ 4, /* size */ the_insn.exp.X_add_symbol, the_insn.exp.X_subtract_symbol, the_insn.exp.X_add_number, the_insn.pcrel, /* merge bit fields into one argument */ (int)(((the_insn.highlow & 0x3) << 4) | (the_insn.reloc & 0xf)) ); } the_insn = pseudo[++i]; } while (--no_opcodes > 0); } static void i860_ip(str) char *str; { char *s; const char *args; char c; unsigned long i; struct i860_opcode *insn; char *argsStart; unsigned long opcode; unsigned int mask; int match = 0; int comma = 0; for (s = str; islower(*s) || *s == '.' || *s == '3'; ++s) ; switch (*s) { case '\0': break; case ',': comma = 1; /*FALLTHROUGH*/ case ' ': *s++ = '\0'; break; default: as_bad("Unknown opcode: `%s'", str); exit(1); } if (strncmp(str, "d.", 2) == 0) { /* check for d. opcode prefix */ if (dual_mode == DUAL_ON) dual_mode = DUAL_ONDDOT; else dual_mode = DUAL_DDOT; str += 2; } if ((insn = (struct i860_opcode *) hash_find(op_hash, str)) == NULL) { if (dual_mode == DUAL_DDOT || dual_mode == DUAL_ONDDOT) str -= 2; as_bad("Unknown opcode: `%s'", str); return; } if (comma) { *--s = ','; } argsStart = s; for (;;) { opcode = insn->match; bzero(&the_insn, sizeof(the_insn)); the_insn.reloc = NO_RELOC; /* * Build the opcode, checking as we go to make * sure that the operands match */ for (args = insn->args; ; ++args) { switch (*args) { case '\0': /* end of args */ if (*s == '\0') { match = 1; } break; case '+': case '(': /* these must match exactly */ case ')': case ',': case ' ': if (*s++ == *args) continue; break; case '#': /* must be at least one digit */ if (isdigit(*s++)) { while (isdigit(*s)) { ++s; } continue; } break; case '1': /* next operand must be a register */ case '2': case 'd': switch (*s) { case 'f': /* frame pointer */ s++; if (*s++ == 'p') { mask = 0x3; break; } goto error; case 's': /* stack pointer */ s++; if (*s++ == 'p') { mask= 0x2; break; } goto error; case 'r': /* any register */ s++; if (!isdigit(c = *s++)) { goto error; } if (isdigit(*s)) { if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32) { goto error; } } else { c -= '0'; } mask= c; break; default: /* not this opcode */ goto error; } /* * Got the register, now figure out where * it goes in the opcode. */ switch (*args) { case '1': opcode |= mask << 11; continue; case '2': opcode |= mask << 21; continue; case 'd': opcode |= mask << 16; continue; } break; case 'e': /* next operand is a floating point register */ case 'f': case 'g': if (*s++ == 'f' && isdigit(*s)) { mask = *s++; if (isdigit(*s)) { mask = 10 * (mask - '0') + (*s++ - '0'); if (mask >= 32) { break; } } else { mask -= '0'; } switch (*args) { case 'e': opcode |= mask << 11; continue; case 'f': opcode |= mask << 21; continue; case 'g': opcode |= mask << 16; if (dual_mode != DUAL_OFF) opcode |= (1 << 9); /* dual mode instruction */ if (dual_mode == DUAL_DDOT) dual_mode = DUAL_OFF; if (dual_mode == DUAL_ONDDOT) dual_mode = DUAL_ON; if ((opcode & (1 << 10)) && (mask == ((opcode >> 11) & 0x1f))) as_warn("Fsr1 equals fdest with Pipelining"); continue; } } break; case 'c': /* next operand must be a control register */ if (strncmp(s, "fir", 3) == 0) { opcode |= 0x0 << 21; s += 3; continue; } if (strncmp(s, "psr", 3) == 0) { opcode |= 0x1 << 21; s += 3; continue; } if (strncmp(s, "dirbase", 7) == 0) { opcode |= 0x2 << 21; s += 7; continue; } if (strncmp(s, "db", 2) == 0) { opcode |= 0x3 << 21; s += 2; continue; } if (strncmp(s, "fsr", 3) == 0) { opcode |= 0x4 << 21; s += 3; continue; } if (strncmp(s, "epsr", 4) == 0) { opcode |= 0x5 << 21; s += 4; continue; } break; case '5': /* 5 bit immediate in src1 */ bzero(&the_insn, sizeof(the_insn)); if ( !getExpression(s)) { s = expr_end; if (the_insn.exp.X_add_number & ~0x1f) as_bad("5-bit immediate too large"); opcode |= (the_insn.exp.X_add_number & 0x1f) << 11; bzero(&the_insn, sizeof(the_insn)); the_insn.reloc = NO_RELOC; continue; } break; case 'l': /* 26 bit immediate, relative branch */ the_insn.reloc = BRADDR; the_insn.pcrel = 1; goto immediate; case 's': /* 16 bit immediate, split relative branch */ /* upper 5 bits of offset in dest field */ the_insn.pcrel = 1; the_insn.reloc = SPLIT0; goto immediate; case 'S': /* 16 bit immediate, split (st), aligned */ if (opcode & (1 << 28)) if (opcode & 0x1) the_insn.reloc = SPLIT2; else the_insn.reloc = SPLIT1; else the_insn.reloc = SPLIT0; goto immediate; case 'I': /* 16 bit immediate, aligned */ if (opcode & (1 << 28)) if (opcode & 0x1) the_insn.reloc = LOW2; else the_insn.reloc = LOW1; else the_insn.reloc = LOW0; goto immediate; case 'i': /* 16 bit immediate */ the_insn.reloc = LOW0; /*FALLTHROUGH*/ immediate: if(*s==' ') s++; if (strncmp(s, "ha%", 3) == 0) { the_insn.highlow = HIGHADJ; s += 3; } else if (strncmp(s, "h%", 2) == 0) { the_insn.highlow = HIGH; s += 2; } else if (strncmp(s, "l%", 2) == 0) { the_insn.highlow = PAIR; s += 2; } the_insn.expand = insn->expand; /* Note that if the getExpression() fails, we will still have created U entries in the symbol table for the 'symbols' in the input string. Try not to create U symbols for registers, etc. */ if ( !getExpression(s)) { s = expr_end; continue; } break; default: as_fatal("failed sanity check."); } break; } error: if (match == 0) { /* Args don't match. */ if (&insn[1] - i860_opcodes < NUMOPCODES && !strcmp(insn->name, insn[1].name)) { ++insn; s = argsStart; continue; } else { as_bad("Illegal operands"); return; } } break; } the_insn.opcode = opcode; return; } static int getExpression(str) char *str; { char *save_in; segT seg; save_in = input_line_pointer; input_line_pointer = str; switch (seg = expression(&the_insn.exp)) { case SEG_ABSOLUTE: case SEG_TEXT: case SEG_DATA: case SEG_BSS: case SEG_UNKNOWN: case SEG_DIFFERENCE: case SEG_BIG: case SEG_ABSENT: break; default: the_insn.error = "bad segment"; expr_end = input_line_pointer; input_line_pointer=save_in; return 1; } expr_end = input_line_pointer; input_line_pointer = save_in; return 0; } /* 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; char *atof_ieee(); 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_number_to_imm(buf,val,n, fixP) char *buf; long val; int n; fixS *fixP; { enum reloc_type reloc = fixP->fx_r_type & 0xf; enum highlow_type highlow = (fixP->fx_r_type >> 4) & 0x3; assert(buf); assert(n == 4); /* always on i860 */ switch(highlow) { case HIGHADJ: /* adjusts the high-order 16-bits */ if (val & (1 << 15)) val += (1 << 16); /*FALLTHROUGH*/ case HIGH: /* selects the high-order 16-bits */ val >>= 16; break; case PAIR: /* selects the low-order 16-bits */ val = val & 0xffff; break; default: break; } switch(reloc) { case BRADDR: /* br,call,bc,bc.t,bnc,bnc.t w/26-bit immediate */ if (fixP->fx_pcrel != 1) as_bad("26-bit branch w/o pc relative set: 0x%08x", val); val >>= 2; /* align pcrel offset, see manual */ if (val >= (1 << 25) || val < -(1 << 25)) /* check for overflow */ as_bad("26-bit branch offset overflow: 0x%08x", val); buf[0] = (buf[0] & 0xfc) | ((val >> 24) & 0x3); buf[1] = val >> 16; buf[2] = val >> 8; buf[3] = val; break; case SPLIT2: /* 16 bit immediate, 4-byte aligned */ if (val & 0x3) as_bad("16-bit immediate 4-byte alignment error: 0x%08x", val); val &= ~0x3; /* 4-byte align value */ /*FALLTHROUGH*/ case SPLIT1: /* 16 bit immediate, 2-byte aligned */ if (val & 0x1) as_bad("16-bit immediate 2-byte alignment error: 0x%08x", val); val &= ~0x1; /* 2-byte align value */ /*FALLTHROUGH*/ case SPLIT0: /* st,bla,bte,btne w/16-bit immediate */ if (fixP->fx_pcrel == 1) val >>= 2; /* align pcrel offset, see manual */ /* check for bounds */ if (highlow != PAIR && (val >= (1 << 16) || val < -(1 << 15))) as_bad("16-bit branch offset overflow: 0x%08x", val); buf[1] = (buf[1] & ~0x1f) | ((val >> 11) & 0x1f); buf[2] = (buf[2] & ~0x7) | ((val >> 8) & 0x7); buf[3] |= val; /* perserve bottom opcode bits */ break; case LOW4: /* fld,pfld,pst,flush 16-byte aligned */ if (val & 0xf) as_bad("16-bit immediate 16-byte alignment error: 0x%08x", val); val &= ~0xf; /* 16-byte align value */ /*FALLTHROUGH*/ case LOW3: /* fld,pfld,pst,flush 8-byte aligned */ if (val & 0x7) as_bad("16-bit immediate 8-byte alignment error: 0x%08x", val); val &= ~0x7; /* 8-byte align value */ /*FALLTHROUGH*/ case LOW2: /* 16 bit immediate, 4-byte aligned */ if (val & 0x3) as_bad("16-bit immediate 4-byte alignment error: 0x%08x", val); val &= ~0x3; /* 4-byte align value */ /*FALLTHROUGH*/ case LOW1: /* 16 bit immediate, 2-byte aligned */ if (val & 0x1) as_bad("16-bit immediate 2-byte alignment error: 0x%08x", val); val &= ~0x1; /* 2-byte align value */ /*FALLTHROUGH*/ case LOW0: /* 16 bit immediate, byte aligned */ /* check for bounds */ if (highlow != PAIR && (val >= (1 << 16) || val < -(1 << 15))) as_bad("16-bit immediate overflow: 0x%08x", val); buf[2] = val >> 8; buf[3] |= val; /* perserve bottom opcode bits */ break; case NO_RELOC: default: as_bad("bad relocation type: 0x%02x", reloc); break; } return; } /* should never be called for i860 */ 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("i860_create_short_jmp\n"); } /* should never be called for i860 */ void md_number_to_disp(buf,val,n) char *buf; long val; { as_fatal("md_number_to_disp\n"); } /* should never be called for i860 */ void md_number_to_field(buf,val,fix) char *buf; long val; void *fix; { as_fatal("i860_number_to_field\n"); } /* the bit-field entries in the relocation_info struct plays hell with the byte-order problems of cross-assembly. So as a hack, I added this mach. dependent ri twiddler. Ugly, but it gets you there. -KWK */ /* on i860: 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 pcrel, bit 6 as extern, and the lower six bits as relocation type (highlow 5-4). Next 4 bytes are long addend. */ /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */ void md_ri_to_chars(ri_p, ri) struct relocation_info *ri_p, ri; { #if 0 unsigned char the_bytes[sizeof(*ri_p)]; /* this is easy */ md_number_to_chars(the_bytes, ri.r_address, sizeof(ri.r_address)); /* now the fun stuff */ the_bytes[4] = (ri.r_index >> 16) & 0x0ff; the_bytes[5] = (ri.r_index >> 8) & 0x0ff; the_bytes[6] = ri.r_index & 0x0ff; the_bytes[7] = ((ri.r_extern << 7) & 0x80) | (0 & 0x60) | (ri.r_type & 0x1F); /* Also easy */ md_number_to_chars(&the_bytes[8], ri.r_addend, sizeof(ri.r_addend)); /* now put it back where you found it, Junior... */ bcopy (the_bytes, (char *)ri_p, sizeof(*ri_p)); #endif } /* should never be called for i860 */ void md_convert_frag(headers, fragP) object_headers *headers; register fragS *fragP; { as_fatal("i860_convert_frag\n"); } /* should never be called for i860 */ void md_create_long_jump(ptr, from_addr, to_addr, frag, to_symbol) char *ptr; long from_addr, to_addr; fragS *frag; symbolS *to_symbol; { as_fatal("i860_create_long_jump\n"); } /* should never be called for i860 */ int md_estimate_size_before_relax(fragP, segtype) register fragS *fragP; segT segtype; { as_fatal("i860_estimate_size_before_relax\n"); } /* for debugging only, must match enum reloc_type */ static char *Reloc[] = { "NO_RELOC", "BRADDR", "LOW0", "LOW1", "LOW2", "LOW3", "LOW4", "SPLIT0", "SPLIT1", "SPLIT2", "RELOC_32", }; static char *Highlow[] = { "NO_SPEC", "PAIR", "HIGH", "HIGHADJ", }; static void print_insn(insn) struct i860_it *insn; { if (insn->error) { fprintf(stderr, "ERROR: %s\n"); } fprintf(stderr, "opcode=0x%08x\t", insn->opcode); fprintf(stderr, "expand=0x%08x\t", insn->expand); fprintf(stderr, "reloc = %s\t", Reloc[insn->reloc]); fprintf(stderr, "highlow = %s\n", Highlow[insn->highlow]); 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; } int md_parse_option(argP,cntP,vecP) char **argP; int *cntP; char ***vecP; { return 1; } /* * I860 relocations are completely different, so it needs * this machine dependent routine to emit them. */ void emit_machine_reloc(fixP, segment_address_in_file) register fixS *fixP; relax_addressT segment_address_in_file; { struct reloc_info_i860 ri; register symbolS *symbolP; extern char *next_object_file_charP; long add_number; bzero((char *) &ri, sizeof(ri)); for (; fixP; fixP = fixP->fx_next) { if (fixP->fx_r_type & ~0x3f) { as_fatal("fixP->fx_r_type = %d\n", fixP->fx_r_type); } ri.r_pcrel = fixP->fx_pcrel; ri.r_type = fixP->fx_r_type; if ((symbolP = fixP->fx_addsy) != NULL) { ri.r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file; if ((symbolP->sy_type & N_TYPE) == N_UNDF) { ri.r_extern = 1; ri.r_symbolnum = symbolP->sy_number; } else { ri.r_extern = 0; ri.r_symbolnum = symbolP->sy_type & N_TYPE; } if (symbolP && symbolP->sy_frag) { ri.r_addend = symbolP->sy_frag->fr_address; } ri.r_type = fixP->fx_r_type; if (fixP->fx_pcrel) { /* preserve actual offset vs. pc + 4 */ ri.r_addend -= (ri.r_address + 4); } else { ri.r_addend = fixP->fx_addnumber; } md_ri_to_chars((char *) &ri, ri); append(&next_object_file_charP, (char *)& ri, sizeof(ri)); } } return; } /* Parse an operand that is machine-specific. We just return without modifying the expression if we have nothing to do. */ /* ARGSUSED */ void md_operand (expressionP) expressionS *expressionP; { } /* We have no need to default values of symbols. */ /* ARGSUSED */ symbolS * md_undefined_symbol (name) char *name; { return 0; } /* 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 i860, they're relative to the address of the offset, plus its size. (??? Is this right? FIXME-SOON!) */ long md_pcrel_from (fixP) fixS *fixP; { return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; } void md_apply_fix(fixP, val) fixS *fixP; long val; { char *place = fixP->fx_where + fixP->fx_frag->fr_literal; if (!fixP->fx_bit_fixP) { switch (fixP->fx_im_disp) { case 0: fixP->fx_addnumber = val; md_number_to_imm(place, val, fixP->fx_size, fixP); break; case 1: md_number_to_disp (place, fixP->fx_pcrel ? val+fixP->fx_pcrel_adjust:val, fixP->fx_size); break; case 2: /* fix requested for .long .word etc */ md_number_to_chars (place, val, fixP->fx_size); break; default: as_fatal("Internal error in md_apply_fix() in file \"%s\"", __FILE__); } /* OVE: maybe one ought to put _imm _disp _chars in one md-func */ } else { md_number_to_field (place, val, fixP->fx_bit_fixP); } return; } /* md_apply_fix() */ /* * Local Variables: * fill-column: 131 * comment-column: 0 */ /* end of i860.c */