--- /dev/null
+/* 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);
projects / binutils-gdb.git / commitdiff