/* tc-h8500.c -- Assemble code for the Hitachi H8/500 Copyright (C) 1993 Free Software Foundation. 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. */ /* Written By Steve Chamberlain sac@cygnus.com */ #include #include "as.h" #include "bfd.h" #include "subsegs.h" #define DEFINE_TABLE #define ASSEMBLER_TABLE #include "../opcodes/h8500-opc.h" #include const char comment_chars[] = "!"; const char line_separator_chars[] = ";"; const char line_comment_chars[] = "!"; /* This table describes all the machine specific pseudo-ops the assembler has to support. The fields are: pseudo-op name without dot function to call to execute this pseudo-op Integer arg to pass to the function */ void cons (); const pseudo_typeS md_pseudo_table[] = { {"int", cons, 2}, {"data.b", cons, 1}, {"data.w", cons, 2}, {"data.l", cons, 4}, {"form", listing_psize, 0}, {"heading", listing_title, 0}, {"import", s_ignore, 0}, {"page", listing_eject, 0}, {"program", s_ignore, 0}, {0, 0, 0} }; int md_reloc_size; 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"; #define C(a,b) ENCODE_RELAX(a,b) #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) #define GET_WHAT(x) ((x>>2)) #define BYTE_DISP 1 #define WORD_DISP 2 #define UNDEF_BYTE_DISP 0 #define UNDEF_WORD_DISP 3 #define BRANCH 1 #define SCB_F 2 #define SCB_TST 3 #define END 4 #define BYTE_F 127 #define BYTE_B -126 #define WORD_F 32767 #define WORD_B 32768 relax_typeS md_relax_table[C (END, 0)]; static struct hash_control *opcode_hash_control; /* Opcode mnemonics */ /* This function is called once, at assembler startup time. This should set up all the tables, etc that the MD part of the assembler needs */ void md_begin () { h8500_opcode_info *opcode; char prev_buffer[100]; int idx = 0; opcode_hash_control = hash_new (); prev_buffer[0] = 0; /* Insert unique names into hash table */ for (opcode = h8500_table; opcode->name; opcode++) { if (idx != opcode->idx) { hash_insert (opcode_hash_control, opcode->name, (char *) opcode); idx++; } } /* Initialize the relax table */ md_relax_table[C (BRANCH, BYTE_DISP)].rlx_forward = BYTE_F; md_relax_table[C (BRANCH, BYTE_DISP)].rlx_backward = BYTE_B; md_relax_table[C (BRANCH, BYTE_DISP)].rlx_length = 2; md_relax_table[C (BRANCH, BYTE_DISP)].rlx_more = C (BRANCH, WORD_DISP); md_relax_table[C (BRANCH, WORD_DISP)].rlx_forward = WORD_F; md_relax_table[C (BRANCH, WORD_DISP)].rlx_backward = WORD_B; md_relax_table[C (BRANCH, WORD_DISP)].rlx_length = 3; md_relax_table[C (BRANCH, WORD_DISP)].rlx_more = 0; md_relax_table[C (SCB_F, BYTE_DISP)].rlx_forward = BYTE_F; md_relax_table[C (SCB_F, BYTE_DISP)].rlx_backward = BYTE_B; md_relax_table[C (SCB_F, BYTE_DISP)].rlx_length = 3; md_relax_table[C (SCB_F, BYTE_DISP)].rlx_more = C (SCB_F, WORD_DISP); md_relax_table[C (SCB_F, WORD_DISP)].rlx_forward = WORD_F; md_relax_table[C (SCB_F, WORD_DISP)].rlx_backward = WORD_B; md_relax_table[C (SCB_F, WORD_DISP)].rlx_length = 8; md_relax_table[C (SCB_F, WORD_DISP)].rlx_more = 0; md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_forward = BYTE_F; md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_backward = BYTE_B; md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_length = 3; md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_more = C (SCB_TST, WORD_DISP); md_relax_table[C (SCB_TST, WORD_DISP)].rlx_forward = WORD_F; md_relax_table[C (SCB_TST, WORD_DISP)].rlx_backward = WORD_B; md_relax_table[C (SCB_TST, WORD_DISP)].rlx_length = 10; md_relax_table[C (SCB_TST, WORD_DISP)].rlx_more = 0; } static int rn; /* register number used by RN */ static int rs; /* register number used by RS */ static int rd; /* register number used by RD */ static int crb; /* byte size cr */ static int crw; /* word sized cr */ static int cr; /* unknown size cr */ static expressionS displacement;/* displacement expression */ static int displacement_size; /* and size if given */ static int immediate_inpage; static expressionS immediate; /* immediate expression */ static int immediate_size; /* and size if given */ static expressionS absolute; /* absolute expression */ static int absolute_size; /* and size if given */ typedef struct { int type; int reg; expressionS exp; int page; } h8500_operand_info; /* try and parse a reg name, returns number of chars consumed */ static int parse_reg (src, mode, reg) char *src; int *mode; int *reg; { if (src[0] == 'r') { if (src[1] >= '0' && src[1] <= '7') { *mode = RN; *reg = (src[1] - '0'); return 2; } } if (src[0] == 's' && src[1] == 'p') { *mode = RN; *reg = 7; return 2; } if (src[0] == 'c' && src[1] == 'c' && src[2] == 'r') { *mode = CRB; *reg = 1; return 3; } if (src[0] == 's' && src[1] == 'r') { *mode = CRW; *reg = 0; return 2; } if (src[0] == 'b' && src[1] == 'r') { *mode = CRB; *reg = 3; return 2; } if (src[0] == 'e' && src[1] == 'p') { *mode = CRB; *reg = 4; return 2; } if (src[0] == 'd' && src[1] == 'p') { *mode = CRB; *reg = 5; return 2; } if (src[0] == 't' && src[1] == 'p') { *mode = CRB; *reg = 7; return 2; } if (src[0] == 'f' && src[1] == 'p') { *mode = RN; *reg = 6; return 2; } return 0; } static char * parse_exp (s, op, page) char *s; expressionS *op; int *page; { char *save; char *new; segT seg; save = input_line_pointer; *page = 0; if (s[0] == '%') { if (s[1] == 'p' && s[2] == 'a' && s[3] == 'g' && s[4] == 'e') { s += 5; *page = 'p'; } else if (s[1] == 'o' && s[2] == 'f' && s[3] == 'f') { s += 4; *page = 'o'; } } input_line_pointer = s; seg = expr (0, op); new = input_line_pointer; input_line_pointer = save; if (SEG_NORMAL (seg)) return new; switch (seg) { case SEG_ABSOLUTE: case SEG_UNKNOWN: case SEG_DIFFERENCE: case SEG_BIG: case SEG_REGISTER: return new; case SEG_ABSENT: as_bad ("Missing operand"); return new; default: as_bad ("Don't understand operand of type %s", segment_name (seg)); return new; } } typedef enum { exp_signed, exp_unsigned, exp_sandu } sign_type; static char * skip_colonthing (sign, ptr, exp, def, size8, size16, size24) sign_type sign; char *ptr; h8500_operand_info *exp; int def; int size8; int size16; int size24; { ptr = parse_exp (ptr, &exp->exp, &exp->page); if (*ptr == ':') { ptr++; if (*ptr == '8') { ptr++; exp->type = size8; } else if (ptr[0] == '1' & ptr[1] == '6') { ptr += 2; exp->type = size16; } else if (ptr[0] == '2' & ptr[1] == '4') { if (!size24) { as_bad (":24 not valid for this opcode"); } ptr += 2; exp->type = size24; } else { as_bad ("expect :8,:16 or :24"); exp->type = size16; } } else { if (exp->page == 'p') { exp->type = IMM8; } else { /* Let's work out the size from the context */ int n = exp->exp.X_add_number; if (size8 && exp->exp.X_seg == SEG_ABSOLUTE && ((sign == exp_signed && (n >= -128 && n <= 127)) || (sign == exp_unsigned && (n >= 0 && (n <= 255))) || (sign == exp_sandu && (n >= -128 && (n <= 255))))) { exp->type = size8; } else { exp->type = def; } } } return ptr; } static int parse_reglist (src, op) char *src; h8500_operand_info *op; { int mode; int rn; int mask = 0; int rm; int idx = 1; /* skip ( */ while (src[idx] && src[idx] != ')') { int done = parse_reg (src + idx, &mode, &rn); if (done) { idx += done; mask |= 1 << rn; } else { as_bad ("syntax error in reg list"); return 0; } if (src[idx] == '-') { idx++; done = parse_reg (src + idx, &mode, &rm); if (done) { idx += done; while (rn <= rm) { mask |= 1 << rn; rn++; } } else { as_bad ("missing final register in range"); } } if (src[idx] == ',') idx++; } idx++; op->exp.X_add_symbol = 0; op->exp.X_subtract_symbol = 0; op->exp.X_add_number = mask; op->exp.X_seg = SEG_ABSOLUTE; op->type = IMM8; return idx; } /* The many forms of operand: Rn Register direct @Rn Register indirect @(disp[:size], Rn) Register indirect with displacement @Rn+ @-Rn @aa[:size] absolute #xx[:size] immediate data */ static void get_operand (ptr, op, ispage) char **ptr; h8500_operand_info *op; char ispage; { char *src = *ptr; int mode; unsigned int num; unsigned int len; op->page = 0; if (src[0] == '(' && src[1] == 'r') { /* This is a register list */ *ptr = src + parse_reglist (src, op); return; } len = parse_reg (src, &op->type, &op->reg); if (len) { *ptr = src + len; return; } if (*src == '@') { src++; if (*src == '-') { src++; len = parse_reg (src, &mode, &num); if (len == 0) { /* Oops, not a reg after all, must be ordinary exp */ src--; /* must be a symbol */ *ptr = skip_colonthing (exp_unsigned, src, op, ABS16, ABS8, ABS16, ABS24); return; } op->type = RNDEC; op->reg = num; *ptr = src + len; return; } if (*src == '(') { /* Disp */ src++; src = skip_colonthing (exp_signed, src, op, RNIND_D16, RNIND_D8, RNIND_D16, 0); if (*src != ',') { as_bad ("expected @(exp, Rn)"); return; } src++; len = parse_reg (src, &mode, &op->reg); if (len == 0 || mode != RN) { as_bad ("expected @(exp, Rn)"); return; } src += len; if (*src != ')') { as_bad ("expected @(exp, Rn)"); return; } *ptr = src + 1; return; } len = parse_reg (src, &mode, &num); if (len) { src += len; if (*src == '+') { src++; if (mode != RN) { as_bad ("@Rn+ needs word register"); return; } op->type = RNINC; op->reg = num; *ptr = src; return; } if (mode != RN) { as_bad ("@Rn needs word register"); return; } op->type = RNIND; op->reg = num; *ptr = src; return; } else { /* must be a symbol */ *ptr = skip_colonthing (exp_unsigned, src, op, ispage ? ABS24 : ABS16, ABS8, ABS16, ABS24); return; } } if (*src == '#') { src++; *ptr = skip_colonthing (exp_sandu, src, op, IMM16, IMM8, IMM16, ABS24); return; } else { *ptr = skip_colonthing (exp_signed, src, op, ispage ? ABS24 : PCREL8, PCREL8, PCREL16, ABS24); } } static char * get_operands (info, args, operand) h8500_opcode_info *info; char *args; h8500_operand_info *operand; { char *ptr = args; switch (info->nargs) { case 0: operand[0].type = 0; operand[1].type = 0; break; case 1: ptr++; get_operand (&ptr, operand + 0, info->name[0] == 'p'); operand[1].type = 0; break; case 2: ptr++; get_operand (&ptr, operand + 0, 0); if (*ptr == ',') ptr++; get_operand (&ptr, operand + 1, 0); break; default: abort (); } return ptr; } /* Passed a pointer to a list of opcodes which use different addressing modes, return the opcode which matches the opcodes provided */ int pcrel8; /* Set when we've seen a pcrel operand */ static h8500_opcode_info * get_specific (opcode, operands) h8500_opcode_info *opcode; h8500_operand_info *operands; { h8500_opcode_info *this_try = opcode; int found = 0; unsigned int noperands = opcode->nargs; unsigned int this_index = opcode->idx; while (this_index == opcode->idx && !found) { unsigned int i; this_try = opcode++; /* look at both operands needed by the opcodes and provided by the user*/ for (i = 0; i < noperands; i++) { h8500_operand_info *user = operands + i; switch (this_try->arg_type[i]) { case FPIND_D8: /* Opcode needs (disp:8,fp) */ if (user->type == RNIND_D8 && user->reg == 6) { displacement = user->exp; continue; } break; case RDIND_D16: if (user->type == RNIND_D16) { displacement = user->exp; rd = user->reg; continue; } break; case RDIND_D8: if (user->type == RNIND_D8) { displacement = user->exp; rd = user->reg; continue; } break; case RNIND_D16: case RNIND_D8: if (user->type == this_try->arg_type[i]) { displacement = user->exp; rn = user->reg; continue; } break; case SPDEC: if (user->type == RNDEC && user->reg == 7) { continue; } break; case SPINC: if (user->type == RNINC && user->reg == 7) { continue; } break; case ABS16: if (user->type == ABS16) { absolute = user->exp; continue; } break; case ABS8: if (user->type == ABS8) { absolute = user->exp; continue; } break; case ABS24: if (user->type == ABS24) { absolute = user->exp; continue; } break; case CRB: if ((user->type == CRB || user->type == CR) && user->reg != 0) { crb = user->reg; continue; } break; case CRW: if ((user->type == CRW || user->type == CR) && user->reg == 0) { crw = user->reg; continue; } break; case DISP16: if (user->type == DISP16) { displacement = user->exp; continue; } break; case DISP8: if (user->type == DISP8) { displacement = user->exp; continue; } break; case FP: if (user->type == RN && user->reg == 6) { continue; } break; case PCREL16: if (user->type == PCREL16) { displacement = user->exp; continue; } break; case PCREL8: if (user->type == PCREL8) { displacement = user->exp; pcrel8 = 1; continue; } break; case IMM16: if (user->type == IMM16 || user->type == IMM8) { immediate_inpage = user->page; immediate = user->exp; continue; } break; case RLIST: case IMM8: if (user->type == IMM8) { immediate_inpage = user->page; immediate = user->exp; continue; } break; case IMM4: if (user->type == IMM8) { immediate_inpage = user->page; immediate = user->exp; continue; } break; case QIM: if (user->type == IMM8 && user->exp.X_seg == SEG_ABSOLUTE && (user->exp.X_add_number == -2 || user->exp.X_add_number == -1 || user->exp.X_add_number == 1 || user->exp.X_add_number == 2)) { immediate_inpage = user->page; immediate = user->exp; continue; } break; case RD: if (user->type == RN) { rd = user->reg; continue; } break; case RS: if (user->type == RN) { rs = user->reg; continue; } break; case RDIND: if (user->type == RNIND) { rd = user->reg; continue; } break; case RNINC: case RNIND: case RNDEC: case RN: if (user->type == this_try->arg_type[i]) { rn = user->reg; continue; } break; case SP: if (user->type == RN && user->reg == 7) { continue; } break; default: printf ("unhandled %d\n", this_try->arg_type[i]); break; } /* If we get here this didn't work out */ goto fail; } found = 1; fail:; } if (found) return this_try; else return 0; } int check (operand, low, high) expressionS *operand; int low; int high; { if (operand->X_seg != SEG_ABSOLUTE || operand->X_add_number < low || operand->X_add_number > high) { as_bad ("operand must be absolute in range %d..%d", low, high); } return operand->X_add_number; } static void insert (output, index, exp, reloc, pcrel) char *output; int index; expressionS *exp; int reloc; int pcrel; { fix_new (frag_now, output - frag_now->fr_literal + index, 4, /* always say size is 4, but we know better */ exp->X_add_symbol, exp->X_subtract_symbol, exp->X_add_number, pcrel, reloc); } void build_relaxable_instruction (opcode, operand) h8500_opcode_info *opcode; h8500_operand_info *operand; { /* All relaxable instructions start life as two bytes but can become three bytes long if a lonely branch and up to 9 bytes if long scb */ char *p; int len; int type; if (opcode->bytes[0].contents == 0x01) { type = SCB_F; } else if (opcode->bytes[0].contents == 0x06 || opcode->bytes[0].contents == 0x07) { type = SCB_TST; } else { type = BRANCH; } p = frag_var (rs_machine_dependent, md_relax_table[C (type, WORD_DISP)].rlx_length, len = md_relax_table[C (type, BYTE_DISP)].rlx_length, C (type, UNDEF_BYTE_DISP), displacement.X_add_symbol, displacement.X_add_number, 0); p[0] = opcode->bytes[0].contents; if (type != BRANCH) { p[1] = opcode->bytes[1].contents | rs; } } /* Now we know what sort of opcodes it is, lets build the bytes - */ static void build_bytes (opcode, operand) h8500_opcode_info *opcode; h8500_operand_info *operand; { int index; if (pcrel8) { pcrel8 = 0; build_relaxable_instruction (opcode, operand); } else { char *output = frag_more (opcode->length); memset (output, 0, opcode->length); for (index = 0; index < opcode->length; index++) { output[index] = opcode->bytes[index].contents; switch (opcode->bytes[index].insert) { default: printf ("failed for %d\n", opcode->bytes[index].insert); break; case 0: break; case RN: output[index] |= rn; break; case RD: case RDIND: output[index] |= rd; break; case RS: output[index] |= rs; break; case DISP16: insert (output, index, &displacement, R_H8500_IMM16, 0); index++; break; case DISP8: case FPIND_D8: insert (output, index, &displacement, R_H8500_IMM8, 0); break; case IMM16: insert (output, index, &immediate, immediate_inpage ? R_H8500_LOW16 : R_H8500_IMM16, 0); index++; break; case RLIST: case IMM8: if (immediate_inpage) { insert (output, index, &immediate, R_H8500_HIGH8, 0); } else { insert (output, index, &immediate, R_H8500_IMM8, 0); } break; case PCREL16: insert (output, index, &displacement, R_H8500_PCREL16, 1); index++; break; case PCREL8: insert (output, index, &displacement, R_H8500_PCREL8, 1); break; case IMM4: output[index] |= check (&immediate, 0, 15); break; case CR: output[index] |= cr; if (cr == 0) { output[0] |= 0x8; } else { output[0] &= ~0x8; } break; case CRB: output[index] |= crb; output[0] &= ~0x8; break; case CRW: output[index] |= crw; output[0] |= 0x8; break; case ABS24: insert (output, index, &absolute, R_H8500_IMM24, 0); index += 2; break; case ABS16: insert (output, index, &absolute, R_H8500_IMM16, 0); index++; break; case ABS8: insert (output, index, &absolute, R_H8500_IMM8, 0); break; case QIM: switch (immediate.X_add_number) { case -2: output[index] |= 0x5; break; case -1: output[index] |= 0x4; break; case 1: output[index] |= 0; break; case 2: output[index] |= 1; break; } break; } } } } /* This is the guts of the machine-dependent assembler. STR points to a machine dependent instruction. This funciton is supposed to emit the frags/bytes it assembles to. */ void DEFUN (md_assemble, (str), char *str) { char *op_start; char *op_end; h8500_operand_info operand[2]; h8500_opcode_info *opcode; h8500_opcode_info *prev_opcode; char name[11]; int nlen = 0; /* Drop leading whitespace */ while (*str == ' ') str++; /* find the op code end */ for (op_start = op_end = str; *op_end && !is_end_of_line[*op_end] && *op_end != ' '; op_end++) { if ( /**op_end != '.' && *op_end != ':' && */ nlen < 10) { name[nlen++] = *op_end; } } name[nlen] = 0; if (op_end == op_start) { as_bad ("can't find opcode "); } opcode = (h8500_opcode_info *) hash_find (opcode_hash_control, name); if (opcode == NULL) { as_bad ("unknown opcode"); return; } input_line_pointer = get_operands (opcode, op_end, operand); prev_opcode = opcode; opcode = get_specific (opcode, operand); if (opcode == 0) { /* Couldn't find an opcode which matched the operands */ char *where = frag_more (2); where[0] = 0x0; where[1] = 0x0; as_bad ("invalid operands for opcode"); return; } build_bytes (opcode, operand); } void DEFUN (tc_crawl_symbol_chain, (headers), object_headers * headers) { printf ("call to tc_crawl_symbol_chain \n"); } symbolS * DEFUN (md_undefined_symbol, (name), char *name) { return 0; } void DEFUN (tc_headers_hook, (headers), object_headers * headers) { printf ("call to tc_headers_hook \n"); } void DEFUN_VOID (md_end) { } /* Various routines to kill one day */ /* Equal to MAX_PRECISION in atof-ieee.c */ #define MAX_LITTLENUMS 6 /* 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. */ 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 */ } int md_parse_option (argP, cntP, vecP) char **argP; int *cntP; char ***vecP; { return 0; } int md_short_jump_size; void tc_aout_fix_to_chars () { printf ("call to tc_aout_fix_to_chars \n"); abort (); } void md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) char *ptr; long from_addr; long to_addr; fragS *frag; symbolS *to_symbol; { as_fatal ("failed sanity check."); } 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 ("failed sanity check."); } static void wordify_scb (buffer, disp_size, inst_size) char *buffer; int *disp_size; int *inst_size; { int rn = buffer[1] & 0x7; switch (buffer[0]) { case 0x0e: /* BSR */ case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x26: case 0x27: case 0x28: case 0x29: case 0x2a: case 0x2b: case 0x2c: case 0x2d: case 0x2e: case 0x2f: buffer[0] |= 0x10; buffer[1] = 0; buffer[2] = 0; *disp_size = 2; *inst_size = 1; return; default: abort (); case 0x01: *inst_size = 6; *disp_size = 2; break; case 0x06: *inst_size = 8; *disp_size = 2; *buffer++ = 0x26; /* bne + 8 */ *buffer++ = 0x08; break; case 0x07: *inst_size = 8; *disp_size = 2; *buffer++ = 0x27; /* bne + 8 */ *buffer++ = 0x08; break; } *buffer++ = 0xa8 | rn; /* addq -1,rn */ *buffer++ = 0x0c; *buffer++ = 0x04; /* cmp #0xff:8, rn */ *buffer++ = 0xff; *buffer++ = 0x70 | rn; *buffer++ = 0x36; /* bne ... */ *buffer++ = 0; *buffer++ = 0; } /* called after relaxing, change the frags so they know how big they are */ void md_convert_frag (headers, fragP) object_headers *headers; fragS *fragP; { int disp_size = 0; int inst_size = 0; char *buffer = fragP->fr_fix + fragP->fr_literal; switch (fragP->fr_subtype) { case C (BRANCH, BYTE_DISP): disp_size = 1; inst_size = 1; break; case C (SCB_F, BYTE_DISP): case C (SCB_TST, BYTE_DISP): disp_size = 1; inst_size = 2; break; /* Branches to a known 16 bit displacement */ /* Turn on the 16bit bit */ case C (BRANCH, WORD_DISP): case C (SCB_F, WORD_DISP): case C (SCB_TST, WORD_DISP): wordify_scb (buffer, &disp_size, &inst_size); break; case C (BRANCH, UNDEF_WORD_DISP): case C (SCB_F, UNDEF_WORD_DISP): case C (SCB_TST, UNDEF_WORD_DISP): /* This tried to be relaxed, but didn't manage it, it now needs a fix */ wordify_scb (buffer, &disp_size, &inst_size); /* Make a reloc */ fix_new (fragP, fragP->fr_fix + inst_size, 4, fragP->fr_symbol, 0, fragP->fr_offset, 0, R_H8500_PCREL16); fragP->fr_fix += disp_size + inst_size; fragP->fr_var = 0; return; break; default: abort (); } if (inst_size) { /* Get the address of the end of the instruction */ int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size; int targ_addr = (S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset); int disp = targ_addr - next_inst; md_number_to_chars (buffer + inst_size, disp, disp_size); fragP->fr_fix += disp_size + inst_size; fragP->fr_var = 0; } } long DEFUN (md_section_align, (seg, size), segT seg AND long size) { return ((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg])); } void md_apply_fix (fixP, val) fixS *fixP; long val; { char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; if (fixP->fx_r_type == 0) { fixP->fx_r_type = fixP->fx_size == 4 ? R_H8500_IMM32 : R_H8500_IMM16; } switch (fixP->fx_r_type) { case R_H8500_IMM8: case R_H8500_PCREL8: *buf++ = val; break; case R_H8500_IMM16: case R_H8500_LOW16: case R_H8500_PCREL16: *buf++ = (val >> 8); *buf++ = val; break; case R_H8500_HIGH8: *buf++ = val >> 16; break; case R_H8500_IMM24: *buf++ = (val >> 16); *buf++ = (val >> 8); *buf++ = val; break; case R_H8500_IMM32: *buf++ = (val >> 24); *buf++ = (val >> 16); *buf++ = (val >> 8); *buf++ = val; break; default: abort (); } } void DEFUN (md_operand, (expressionP), expressionS * expressionP) { } int md_long_jump_size; /* called just before address relaxation, return the length by which a fragment must grow to reach it's destination */ int md_estimate_size_before_relax (fragP, segment_type) register fragS *fragP; register segT segment_type; { int what = GET_WHAT (fragP->fr_subtype); switch (fragP->fr_subtype) { default: abort (); case C (BRANCH, UNDEF_BYTE_DISP): case C (SCB_F, UNDEF_BYTE_DISP): case C (SCB_TST, UNDEF_BYTE_DISP): /* used to be a branch to somewhere which was unknown */ if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) { /* Got a symbol and it's defined in this segment, become byte sized - maybe it will fix up */ fragP->fr_subtype = C (what, BYTE_DISP); fragP->fr_var = md_relax_table[C (what, BYTE_DISP)].rlx_length; } else { /* Its got a segment, but its not ours, so it will always be long */ fragP->fr_subtype = C (what, UNDEF_WORD_DISP); fragP->fr_var = md_relax_table[C (what, WORD_DISP)].rlx_length; return md_relax_table[C (what, WORD_DISP)].rlx_length; } } return fragP->fr_var; } /* Put number into target byte order */ void md_number_to_chars (ptr, use, nbytes) char *ptr; long use; int nbytes; { switch (nbytes) { case 4: *ptr++ = (use >> 24) & 0xff; case 3: *ptr++ = (use >> 16) & 0xff; case 2: *ptr++ = (use >> 8) & 0xff; case 1: *ptr++ = (use >> 0) & 0xff; break; default: abort (); } } long md_pcrel_from (fixP) fixS *fixP; { return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; } void tc_coff_symbol_emit_hook () { } short tc_coff_fix2rtype (fix_ptr) fixS *fix_ptr; { if (fix_ptr->fx_r_type == RELOC_32) { /* cons likes to create reloc32's whatever the size of the reloc.. */ switch (fix_ptr->fx_size) { case 2: return R_H8500_IMM16; break; case 1: return R_H8500_IMM8; break; default: abort (); } } return fix_ptr->fx_r_type; } void tc_reloc_mangle (fix_ptr, intr, base) fixS *fix_ptr; struct internal_reloc *intr; bfd_vma base; { symbolS *symbol_ptr; symbol_ptr = fix_ptr->fx_addsy; /* If this relocation is attached to a symbol then it's ok to output it */ if (fix_ptr->fx_r_type == RELOC_32) { /* cons likes to create reloc32's whatever the size of the reloc.. */ switch (fix_ptr->fx_size) { case 2: intr->r_type = R_IMM16; break; case 1: intr->r_type = R_IMM8; break; default: abort (); } } else { intr->r_type = fix_ptr->fx_r_type; } intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base; intr->r_offset = fix_ptr->fx_offset; /* Turn the segment of the symbol into an offset. */ if (symbol_ptr) { symbolS *dot; dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot; if (dot) { /* intr->r_offset -= segment_info[S_GET_SEGMENT(symbol_ptr)].scnhdr.s_paddr;*/ intr->r_offset += S_GET_VALUE (symbol_ptr); intr->r_symndx = dot->sy_number; } else { intr->r_symndx = symbol_ptr->sy_number; } } else { intr->r_symndx = -1; } } int start_label (ptr) char *ptr; { /* Check for :s.w */ if (isalpha (ptr[1]) && ptr[2] == '.') return 0; /* Check for :s */ if (isalpha (ptr[1]) && !isalpha (ptr[2])) return 0; return 1; } /* end of tc-h8500.c */