diff options
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-w65.c | 1250 | ||||
| -rw-r--r-- | gas/config/tc-w65.h | 47 | ||||
| -rwxr-xr-x | gas/config/w65.mt | 2 |
3 files changed, 1299 insertions, 0 deletions
diff --git a/gas/config/tc-w65.c b/gas/config/tc-w65.c new file mode 100644 index 0000000000..b700ead8df --- /dev/null +++ b/gas/config/tc-w65.c @@ -0,0 +1,1250 @@ +/* tc-w65.c -- Assemble code for the W65816 + + Copyright (C) 1995 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 <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 + +const 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; +} + +int md_short_jump_size; + +void +tc_Nout_fix_to_chars () +{ + printf ("call to tc_Nout_fix_to_chars \n"); + abort (); +} + +void +md_create_short_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol) + char *ptr; + addressT from_Nddr; + addressT to_Nddr; + fragS *frag; + symbolS *to_symbol; +{ + as_fatal ("failed sanity check."); +} + +void +md_create_long_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol) + char *ptr; + addressT from_Nddr, to_Nddr; + fragS *frag; + symbolS *to_symbol; +{ + as_fatal ("failed sanity check."); +} + + +/* +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; + 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 (); + } +} + +void +DEFUN (md_operand, (expressionP), expressionS * expressionP) +{ +} + +int md_long_jump_size; + +/* 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) + struct symbol *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); diff --git a/gas/config/tc-w65.h b/gas/config/tc-w65.h new file mode 100644 index 0000000000..bc0d203121 --- /dev/null +++ b/gas/config/tc-w65.h @@ -0,0 +1,47 @@ +/* This file is tc-w65.h + + Copyright (C) 1995 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. */ + + +#define TC_W65 + +/* This macro translates between an internal fix and an coff reloc type */ +#define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP) + +#define BFD_ARCH bfd_arch_w65 +#define COFF_MAGIC 0x6500 + +#define IGNORE_NONSTANDARD_ESCAPES + +#define TC_RELOC_MANGLE(a,b,c) tc_reloc_mangle(a,b,c) + +#define DO_NOT_STRIP 0 +#define DO_STRIP 0 +#define LISTING_HEADER "W65816 GAS " +#define NEED_FX_R_TYPE 1 +#define RELOC_32 1234 + +#define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag) +#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) w65_expression (EXP, NBYTES) +#define TC_COUNT_RELOC(x) (1) +#define TC_CONS_RELOC tc_cons_reloc +#define DONT_OVERFLOW +int tc_cons_reloc; +/* end of tc-w65.h */ + diff --git a/gas/config/w65.mt b/gas/config/w65.mt new file mode 100755 index 0000000000..b39faae55c --- /dev/null +++ b/gas/config/w65.mt @@ -0,0 +1,2 @@ +TARG_CPU_DEPENDENTS=$(srcdir)/../opcodes/w65-opc.h + |
