| /* tc-w65.c -- Assemble code for the W65816 |
| Copyright (C) 1995, 1998 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, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| /* |
| Written By Steve Chamberlain |
| sac@cygnus.com |
| */ |
| |
| #include <stdio.h> |
| #include "as.h" |
| #include "bfd.h" |
| #include "subsegs.h" |
| #define DEFINE_TABLE |
| #include "../opcodes/w65-opc.h" |
| #include <ctype.h> |
| |
| 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 |
| */ |
| |
| #define OP_BCC 0x90 |
| #define OP_BCS 0xB0 |
| #define OP_BEQ 0xF0 |
| #define OP_BMI 0x30 |
| #define OP_BNE 0xD0 |
| #define OP_BPL 0x10 |
| #define OP_BRA 0x80 |
| #define OP_BRL 0x82 |
| #define OP_BVC 0x50 |
| #define OP_BVS 0x70 |
| |
| void s_longa (); |
| const pseudo_typeS md_pseudo_table[] = |
| { |
| {"int", cons, 2}, |
| {"word", cons, 2}, |
| {"longa", s_longa, 0}, |
| {"longi", s_longa, 1}, |
| {0, 0, 0} |
| }; |
| |
| |
| void cons (); |
| void s_align_bytes (); |
| |
| |
| /*int md_reloc_size; */ |
| |
| static int relax; /* set if -relax seen */ |
| |
| 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"; |
| |
| |
| |
| static struct hash_control *opcode_hash_control; /* Opcode mnemonics */ |
| |
| int M; /* M flag */ |
| int X; /* X flag */ |
| |
| |
| |
| |
| #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 COND_BRANCH 1 |
| #define UNCOND_BRANCH 2 |
| #define END 3 |
| |
| #define BYTE_F 127 /* How far we can branch forwards */ |
| #define BYTE_B -126 /* How far we can branch backwards */ |
| #define WORD_F 32767 |
| #define WORD_B 32768 |
| |
| relax_typeS md_relax_table[C (END, 0)]; |
| |
| /* |
| 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 |
| s_longa (xmode) |
| { |
| int *p = xmode ? &X : &M; |
| while (*input_line_pointer == ' ') |
| input_line_pointer++; |
| if (strncmp (input_line_pointer, "on", 2) == 0) |
| { |
| input_line_pointer += 2; |
| *p = 0; |
| } |
| else if (strncmp (input_line_pointer, "off", 3) == 0) |
| { |
| *p = 1; |
| input_line_pointer += 3; |
| } |
| else |
| as_bad (_("need on or off.")); |
| demand_empty_rest_of_line (); |
| } |
| void |
| md_begin () |
| { |
| relax_typeS *table; |
| struct opinfo *opcode; |
| char *prev_name = ""; |
| |
| opcode_hash_control = hash_new (); |
| |
| /* Insert unique names into hash table */ |
| for (opcode = optable; opcode->name; opcode++) |
| { |
| if (strcmp (prev_name, opcode->name)) |
| { |
| prev_name = opcode->name; |
| hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
| } |
| else |
| { |
| /* Make all the opcodes with the same name point to the same |
| string */ |
| opcode->name = prev_name; |
| } |
| } |
| |
| |
| /* Initialize the relax table. We use a local variable to avoid |
| warnings about modifying a supposedly const data structure. */ |
| table = (relax_typeS *) md_relax_table; |
| table[C (COND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F; |
| table[C (COND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B; |
| table[C (COND_BRANCH, BYTE_DISP)].rlx_length = 2; |
| table[C (COND_BRANCH, BYTE_DISP)].rlx_more = C (COND_BRANCH, WORD_DISP); |
| |
| table[C (COND_BRANCH, WORD_DISP)].rlx_forward = WORD_F; |
| table[C (COND_BRANCH, WORD_DISP)].rlx_backward = WORD_B; |
| table[C (COND_BRANCH, WORD_DISP)].rlx_length = 5; |
| table[C (COND_BRANCH, WORD_DISP)].rlx_more = 0; |
| |
| table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F; |
| table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B; |
| table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_length = 2; |
| table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_more = C (UNCOND_BRANCH, WORD_DISP); |
| |
| table[C (UNCOND_BRANCH, WORD_DISP)].rlx_forward = WORD_F; |
| table[C (UNCOND_BRANCH, WORD_DISP)].rlx_backward = WORD_B; |
| table[C (UNCOND_BRANCH, WORD_DISP)].rlx_length = 3; |
| table[C (UNCOND_BRANCH, WORD_DISP)].rlx_more = 0; |
| |
| flag_signed_overflow_ok = 1; |
| } |
| |
| static expressionS immediate; /* absolute expression */ |
| static expressionS immediate1; /* absolute expression */ |
| |
| |
| static symbolS * |
| dot () |
| { |
| const char *fake; |
| |
| /* JF: '.' is pseudo symbol with value of current location |
| in current segment. */ |
| fake = FAKE_LABEL_NAME; |
| return symbol_new (fake, |
| now_seg, |
| (valueT) frag_now_fix (), |
| frag_now); |
| |
| } |
| |
| int expr_size; |
| int expr_shift; |
| int tc_cons_reloc; |
| void |
| w65_expression (dest, bytes) |
| expressionS *dest; |
| unsigned int bytes; |
| { |
| expr_size = 0; |
| expr_shift = 0; |
| tc_cons_reloc = 0; |
| while (*input_line_pointer == ' ') |
| input_line_pointer++; |
| |
| if (*input_line_pointer == '<') |
| { |
| expr_size = 1; |
| input_line_pointer++; |
| } |
| else if (*input_line_pointer == '>') |
| { |
| expr_shift = 1; |
| input_line_pointer++; |
| } |
| else if (*input_line_pointer == '^') |
| { |
| expr_shift = 2; |
| input_line_pointer++; |
| } |
| |
| expr (0, dest); |
| } |
| |
| int amode; |
| static |
| char * |
| parse_exp (s, bytes) |
| char *s; |
| int bytes; |
| { |
| char *save; |
| char *new; |
| |
| save = input_line_pointer; |
| input_line_pointer = s; |
| w65_expression (&immediate, bytes); |
| if (immediate.X_op == O_absent) |
| as_bad (_("missing operand")); |
| new = input_line_pointer; |
| input_line_pointer = save; |
| return new; |
| } |
| |
| |
| static |
| char * |
| get_operands (info, ptr) |
| struct opinfo *info; |
| char *ptr; |
| { |
| register int override_len = 0; |
| register int bytes = 0; |
| while (*ptr == ' ') |
| ptr++; |
| |
| if (ptr[0] == '#') |
| { |
| ptr++; |
| switch (info->amode) |
| { |
| case ADDR_IMMTOI: |
| bytes = X ? 1 : 2; |
| amode = ADDR_IMMTOI; |
| break; |
| case ADDR_IMMTOA: |
| bytes = M ? 1 : 2; |
| amode = ADDR_IMMTOA; |
| break; |
| case ADDR_IMMCOP: |
| bytes = 1; |
| amode = ADDR_IMMCOP; |
| break; |
| case ADDR_DIR: |
| bytes = 2; |
| amode = ADDR_ABS; |
| break; |
| default: |
| abort (); |
| break; |
| } |
| ptr = parse_exp (ptr); |
| } |
| else if (ptr[0] == '!') |
| { |
| ptr = parse_exp (ptr + 1); |
| if (ptr[0] == ',') |
| { |
| if (ptr[1] == 'y') |
| { |
| amode = ADDR_ABS_IDX_Y; |
| bytes = 2; |
| ptr += 2; |
| } |
| else if (ptr[1] == 'x') |
| { |
| amode = ADDR_ABS_IDX_X; |
| bytes = 2; |
| ptr += 2; |
| } |
| else |
| { |
| as_bad (_("syntax error after <exp")); |
| } |
| } |
| else |
| { |
| amode = ADDR_ABS; |
| bytes = 2; |
| } |
| } |
| else if (ptr[0] == '>') |
| { |
| ptr = parse_exp (ptr + 1); |
| if (ptr[0] == ',' && ptr[1] == 'x') |
| { |
| amode = ADDR_ABS_LONG_IDX_X; |
| bytes = 3; |
| ptr += 2; |
| } |
| else |
| { |
| amode = ADDR_ABS_LONG; |
| bytes = 3; |
| } |
| } |
| else if (ptr[0] == '<') |
| { |
| ptr = parse_exp (ptr + 1); |
| if (ptr[0] == ',') |
| { |
| if (ptr[1] == 'y') |
| { |
| amode = ADDR_DIR_IDX_Y; |
| ptr += 2; |
| bytes = 2; |
| } |
| else if (ptr[1] == 'x') |
| { |
| amode = ADDR_DIR_IDX_X; |
| ptr += 2; |
| bytes = 2; |
| } |
| else |
| { |
| as_bad (_("syntax error after <exp")); |
| } |
| } |
| else |
| { |
| amode = ADDR_DIR; |
| bytes = 1; |
| } |
| } |
| else if (ptr[0] == 'a') |
| { |
| amode = ADDR_ACC; |
| } |
| else if (ptr[0] == '(') |
| { |
| /* Look for (exp),y |
| (<exp),y |
| (exp,x) |
| (<exp,x) |
| (exp) |
| (!exp) |
| (exp) |
| (<exp) |
| (exp,x) |
| (!exp,x) |
| (exp,s) |
| (exp,s),y */ |
| |
| ptr++; |
| if (ptr[0] == '<') |
| { |
| override_len = 1; |
| ptr++; |
| } |
| else if (ptr[0] == '!') |
| { |
| override_len = 2; |
| ptr++; |
| } |
| else if (ptr[0] == '>') |
| { |
| override_len = 3; |
| ptr++; |
| } |
| else |
| { |
| override_len = 0; |
| } |
| ptr = parse_exp (ptr); |
| |
| if (ptr[0] == ',') |
| { |
| ptr++; |
| if (ptr[0] == 'x' && ptr[1] == ')') |
| { |
| ptr += 2; |
| |
| if (override_len == 1) |
| { |
| amode = ADDR_DIR_IDX_IND_X; |
| bytes = 2; |
| } |
| else |
| { |
| amode = ADDR_ABS_IND_IDX; |
| bytes = 2; |
| } |
| } |
| else if (ptr[0] == 's' && ptr[1] == ')' && ptr[2] == ',' && ptr[3] == 'y') |
| { |
| amode = ADDR_STACK_REL_INDX_IDX; |
| bytes = 1; |
| ptr += 4; |
| } |
| } |
| else if (ptr[0] == ')') |
| { |
| if (ptr[1] == ',' && ptr[2] == 'y') |
| { |
| amode = ADDR_DIR_IND_IDX_Y; |
| ptr += 3; |
| bytes = 2; |
| } |
| else |
| { |
| if (override_len == 1) |
| { |
| amode = ADDR_DIR_IND; |
| bytes = 1; |
| } |
| else |
| { |
| amode = ADDR_ABS_IND; |
| bytes = 2; |
| } |
| ptr++; |
| |
| } |
| } |
| |
| } |
| else if (ptr[0] == '[') |
| { |
| ptr = parse_exp (ptr + 1); |
| if (ptr[0] == ']') |
| { |
| ptr++; |
| if (ptr[0] == ',' && ptr[1] == 'y') |
| { |
| bytes = 1; |
| amode = ADDR_DIR_IND_IDX_Y_LONG; |
| ptr += 2; |
| } |
| else |
| { |
| if (info->code == O_jmp) |
| { |
| bytes = 2; |
| amode = ADDR_ABS_IND_LONG; |
| } |
| else |
| { |
| bytes = 1; |
| |
| amode = ADDR_DIR_IND_LONG; |
| } |
| } |
| } |
| } |
| else |
| { |
| ptr = parse_exp (ptr, 2); |
| if (ptr[0] == ',') |
| { |
| if (ptr[1] == 'y') |
| { |
| if (override_len == 1) |
| { |
| bytes = 1; |
| amode = ADDR_DIR_IDX_Y; |
| } |
| else |
| { |
| amode = ADDR_ABS_IDX_Y; |
| bytes = 2; |
| } |
| ptr += 2; |
| } |
| else if (ptr[1] == 'x') |
| { |
| if (override_len == 1) |
| { |
| amode = ADDR_DIR_IDX_X; |
| bytes = 1; |
| } |
| else |
| { |
| amode = ADDR_ABS_IDX_X; |
| bytes = 2; |
| } |
| ptr += 2; |
| } |
| else if (ptr[1] == 's') |
| { |
| bytes = 1; |
| amode = ADDR_STACK_REL; |
| ptr += 2; |
| } |
| else |
| { |
| bytes = 1; |
| immediate1 = immediate; |
| ptr = parse_exp (ptr + 1); |
| amode = ADDR_BLOCK_MOVE; |
| } |
| } |
| else |
| { |
| switch (info->amode) |
| { |
| case ADDR_PC_REL: |
| amode = ADDR_PC_REL; |
| bytes = 1; |
| break; |
| case ADDR_PC_REL_LONG: |
| amode = ADDR_PC_REL_LONG; |
| bytes = 2; |
| break; |
| default: |
| if (override_len == 1) |
| { |
| amode = ADDR_DIR; |
| bytes = 1; |
| } |
| else if (override_len == 3) |
| { |
| bytes = 3; |
| amode = ADDR_ABS_LONG; |
| } |
| else |
| { |
| amode = ADDR_ABS; |
| bytes = 2; |
| } |
| } |
| } |
| } |
| |
| switch (bytes) |
| { |
| case 1: |
| switch (expr_shift) |
| { |
| case 0: |
| if (amode == ADDR_DIR) |
| tc_cons_reloc = R_W65_DP; |
| else |
| tc_cons_reloc = R_W65_ABS8; |
| break; |
| case 1: |
| tc_cons_reloc = R_W65_ABS8S8; |
| break; |
| case 2: |
| tc_cons_reloc = R_W65_ABS8S16; |
| break; |
| } |
| break; |
| case 2: |
| switch (expr_shift) |
| { |
| case 0: |
| tc_cons_reloc = R_W65_ABS16; |
| break; |
| case 1: |
| tc_cons_reloc = R_W65_ABS16S8; |
| break; |
| case 2: |
| tc_cons_reloc = R_W65_ABS16S16; |
| break; |
| } |
| } |
| return ptr; |
| } |
| |
| /* Passed a pointer to a list of opcodes which use different |
| addressing modes, return the opcode which matches the opcodes |
| provided |
| */ |
| |
| static |
| struct opinfo * |
| get_specific (opcode) |
| struct opinfo *opcode; |
| { |
| int ocode = opcode->code; |
| |
| for (; opcode->code == ocode; opcode++) |
| { |
| if (opcode->amode == amode) |
| return opcode; |
| } |
| return 0; |
| } |
| |
| int |
| check (operand, low, high) |
| expressionS *operand; |
| int low; |
| int high; |
| { |
| if (operand->X_op != O_constant |
| || 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 int log2[] = |
| {0, 0, 1, 0, 2}; |
| |
| /* Now we know what sort of opcodes it is, lets build the bytes - |
| */ |
| static void |
| build_Mytes (opcode) |
| struct opinfo *opcode; |
| { |
| int size; |
| int type; |
| int pcrel; |
| char *output; |
| |
| if (opcode->amode == ADDR_IMPLIED) |
| { |
| output = frag_more (1); |
| } |
| else if (opcode->amode == ADDR_PC_REL) |
| { |
| int type; |
| /* This is a relaxable insn, so we do some special handling */ |
| type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH; |
| output = frag_var (rs_machine_dependent, |
| md_relax_table[C (type, WORD_DISP)].rlx_length, |
| md_relax_table[C (type, BYTE_DISP)].rlx_length, |
| C (type, UNDEF_BYTE_DISP), |
| immediate.X_add_symbol, |
| immediate.X_add_number, |
| 0); |
| } |
| else |
| { |
| switch (opcode->amode) |
| { |
| GETINFO (size, type, pcrel); |
| } |
| |
| /* If something special was done in the |
| expression modify the reloc type */ |
| if (tc_cons_reloc) |
| { |
| type = tc_cons_reloc; |
| } |
| |
| |
| |
| /* 1 byte for the opcode + the bytes for the addrmode */ |
| output = frag_more (size + 1); |
| |
| if (opcode->amode == ADDR_BLOCK_MOVE) |
| { |
| /* Two relocs for this one */ |
| fix_new_exp (frag_now, |
| output + 1 - frag_now->fr_literal, |
| 1, |
| &immediate, |
| 0, |
| R_W65_ABS8S16); |
| |
| fix_new_exp (frag_now, |
| output + 2 - frag_now->fr_literal, |
| 1, |
| &immediate1, |
| 0, |
| R_W65_ABS8S16); |
| } |
| else if (type >= 0 |
| && opcode->amode != ADDR_IMPLIED |
| && opcode->amode != ADDR_ACC |
| && opcode->amode != ADDR_STACK) |
| { |
| fix_new_exp (frag_now, |
| output + 1 - frag_now->fr_literal, |
| size, |
| &immediate, |
| pcrel, |
| type); |
| } |
| } |
| output[0] = opcode->val; |
| } |
| |
| /* This is the guts of the machine-dependent assembler. STR points to a |
| machine dependent instruction. This function is supposed to emit |
| the frags/bytes it assembles to. |
| */ |
| |
| void |
| md_assemble (str) |
| char *str; |
| { |
| unsigned char *op_start; |
| unsigned char *op_end; |
| struct opinfo *opcode; |
| char name[20]; |
| int nlen = 0; |
| char *p; |
| |
| /* Drop leading whitespace */ |
| while (*str == ' ') |
| str++; |
| |
| /* all opcodes are three letters */ |
| name[0] = str[0]; |
| name[1] = str[1]; |
| name[2] = str[2]; |
| name[3] = 0; |
| |
| tc_cons_reloc = 0; |
| str += 3; |
| opcode = (struct opinfo *) hash_find (opcode_hash_control, name); |
| |
| if (opcode == NULL) |
| { |
| as_bad (_("unknown opcode")); |
| return; |
| } |
| |
| if (opcode->amode != ADDR_IMPLIED |
| && opcode->amode != ADDR_STACK) |
| { |
| get_operands (opcode, str); |
| opcode = get_specific (opcode); |
| } |
| |
| if (opcode == 0) |
| { |
| /* Couldn't find an opcode which matched the operands */ |
| |
| |
| char *where = frag_more (1); |
| |
| where[0] = 0x0; |
| where[1] = 0x0; |
| as_bad (_("invalid operands for opcode")); |
| return; |
| } |
| |
| build_Mytes (opcode); |
| } |
| |
| |
| 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")); |
| } |
| |
| /* 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_NTOF()"); |
| } |
| t = atof_ieee (input_line_pointer, type, words); |
| if (t) |
| input_line_pointer = t; |
| |
| *sizeP = prec * sizeof (LITTLENUM_TYPE); |
| for (wordP = words + prec - 1; prec--;) |
| { |
| md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); |
| litP += sizeof (LITTLENUM_TYPE); |
| } |
| return 0; |
| } |
| |
| int |
| md_parse_option (c,a) |
| int c; |
| char *a; |
| |
| { |
| return 1; |
| } |
| |
| void |
| tc_Nout_fix_to_chars () |
| { |
| printf (_("call to tc_Nout_fix_to_chars \n")); |
| abort (); |
| } |
| |
| /* |
| called after relaxing, change the frags so they know how big they are |
| */ |
| void |
| md_convert_frag (headers, seg, fragP) |
| object_headers *headers; |
| segT seg; |
| fragS *fragP; |
| { |
| int disp_size = 0; |
| int inst_size = 0; |
| unsigned char *buffer = (unsigned char *) (fragP->fr_fix + fragP->fr_literal); |
| |
| switch (fragP->fr_subtype) |
| { |
| case C (COND_BRANCH, BYTE_DISP): |
| case C (UNCOND_BRANCH, BYTE_DISP): |
| disp_size = 1; |
| inst_size = 1; |
| break; |
| |
| /* cond branches to a known 16 bit displacement */ |
| case C (COND_BRANCH, WORD_DISP): |
| switch (buffer[0]) |
| { |
| case OP_BCC: |
| case OP_BCS: |
| case OP_BEQ: |
| case OP_BMI: |
| case OP_BNE: |
| case OP_BPL: |
| case OP_BVS: |
| case OP_BVC: |
| /* Invert the sense of the test */ |
| buffer[0] ^= 0x20; |
| buffer[1] = 3; /* Jump over following brl */ |
| buffer[2] = OP_BRL; |
| buffer[3] = 0; |
| buffer[4] = 0; |
| disp_size = 2; |
| inst_size = 3; |
| break; |
| default: |
| abort (); |
| } |
| break; |
| case C (UNCOND_BRANCH, WORD_DISP): |
| /* Unconditional branches to a known 16 bit displacement */ |
| |
| switch (buffer[0]) |
| { |
| case OP_BRA: |
| buffer[0] = OP_BRL; |
| disp_size = 2; |
| inst_size = 1; |
| break; |
| default: |
| abort (); |
| } |
| break; |
| /* got to create a branch over a reloc here */ |
| case C (COND_BRANCH, UNDEF_WORD_DISP): |
| buffer[0] ^= 0x20; /* invert test */ |
| buffer[1] = 3; |
| buffer[2] = OP_BRL; |
| buffer[3] = 0; |
| buffer[4] = 0; |
| fix_new (fragP, |
| fragP->fr_fix + 3, |
| 4, |
| fragP->fr_symbol, |
| fragP->fr_offset, |
| 0, |
| R_W65_PCR16); |
| |
| fragP->fr_fix += disp_size + inst_size; |
| fragP->fr_var = 0; |
| break; |
| case C (UNCOND_BRANCH, UNDEF_WORD_DISP): |
| buffer[0] = OP_BRL; |
| buffer[1] = 0; |
| buffer[2] = 0; |
| fix_new (fragP, |
| fragP->fr_fix + 1, |
| 4, |
| fragP->fr_symbol, |
| fragP->fr_offset, |
| 0, |
| R_W65_PCR16); |
| |
| fragP->fr_fix += disp_size + inst_size; |
| fragP->fr_var = 0; |
| 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; |
| } |
| } |
| |
| |
| valueT |
| DEFUN (md_section_align, (seg, size), |
| segT seg AND |
| valueT 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; |
| int addr = fixP->fx_frag->fr_address + fixP->fx_where; |
| |
| if (fixP->fx_r_type == 0) |
| { |
| if (fixP->fx_size == 1) |
| fixP->fx_r_type = R_W65_ABS8; |
| else |
| fixP->fx_r_type = R_W65_ABS16; |
| } |
| |
| switch (fixP->fx_r_type) |
| { |
| case R_W65_ABS8S16: |
| val >>= 8; |
| case R_W65_ABS8S8: |
| val >>= 8; |
| case R_W65_ABS8: |
| *buf++ = val; |
| break; |
| case R_W65_ABS16S16: |
| val >>= 8; |
| case R_W65_ABS16S8: |
| val >>= 8; |
| case R_W65_ABS16: |
| *buf++ = val >> 0; |
| *buf++ = val >> 8; |
| break; |
| case R_W65_ABS24: |
| *buf++ = val >> 0; |
| *buf++ = val >> 8; |
| *buf++ = val >> 16; |
| break; |
| case R_W65_PCR8: |
| *buf++ = val - addr - 1; |
| break; |
| case R_W65_PCR16: |
| val = val - addr - 1; |
| *buf++ = val; |
| *buf++ = val >> 8; |
| break; |
| case R_W65_DP: |
| *buf++ = val; |
| break; |
| |
| default: |
| abort (); |
| } |
| } |
| |
| /* Put number into target byte order */ |
| |
| void |
| md_number_to_chars (ptr, use, nbytes) |
| char *ptr; |
| valueT use; |
| int nbytes; |
| { |
| number_to_chars_littleendian (ptr, use, nbytes); |
| } |
| |
| long |
| md_pcrel_from (fixP) |
| fixS *fixP; |
| { |
| int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1; |
| return gap; |
| } |
| |
| void |
| tc_coff_symbol_emit_hook (x) |
| symbolS *x; |
| { |
| } |
| |
| short |
| tc_coff_fix2rtype (fix_ptr) |
| fixS *fix_ptr; |
| { |
| 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 |
| { |
| if (fix_ptr->fx_size == 4) |
| intr->r_type = R_W65_ABS24; |
| 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 += 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 |
| tc_coff_sizemachdep (frag) |
| fragS *frag; |
| { |
| return md_relax_table[frag->fr_subtype].rlx_length; |
| } |
| |
| |
| |
| |
| |
| /* |
| 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 (COND_BRANCH, UNDEF_BYTE_DISP): |
| case C (UNCOND_BRANCH, 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; |
| } |
| |
| |
| |
| CONST char *md_shortopts = ""; |
| struct option md_longopts[] = { |
| #define OPTION_RELAX (OPTION_MD_BASE) |
| {NULL, no_argument, NULL, 0} |
| }; |
| |
| void |
| md_show_usage (stream) |
| FILE *stream; |
| { |
| |
| } |
| |
| size_t md_longopts_size = sizeof(md_longopts); |