diff options
Diffstat (limited to 'binutils-2.25/gas/config/tc-pdp11.c')
| -rw-r--r-- | binutils-2.25/gas/config/tc-pdp11.c | 1454 |
1 files changed, 1454 insertions, 0 deletions
diff --git a/binutils-2.25/gas/config/tc-pdp11.c b/binutils-2.25/gas/config/tc-pdp11.c new file mode 100644 index 00000000..98e241f6 --- /dev/null +++ b/binutils-2.25/gas/config/tc-pdp11.c @@ -0,0 +1,1454 @@ +/* tc-pdp11.c - pdp11-specific - + Copyright 2001, 2002, 2004, 2005, 2007, 2009 + 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 3, 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, 51 Franklin Street - Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#include "as.h" +#include "safe-ctype.h" +#include "opcode/pdp11.h" + +extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *); + +#define TRUE 1 +#define FALSE 0 + +/* A representation for PDP-11 machine code. */ +struct pdp11_code +{ + char *error; + int code; + int additional; /* Is there an additional word? */ + int word; /* Additional word, if any. */ + struct + { + bfd_reloc_code_real_type type; + expressionS exp; + int pc_rel; + } reloc; +}; + +/* Instruction set extensions. + + If you change this from an array to something else, please update + the "PDP-11 instruction set extensions" comment in pdp11.h. */ +int pdp11_extension[PDP11_EXT_NUM]; + +/* Assembly options. */ + +#define ASM_OPT_PIC 1 +#define ASM_OPT_NUM 2 + +int asm_option[ASM_OPT_NUM]; + +/* These chars start a comment anywhere in a source file (except inside + another comment. */ +const char comment_chars[] = "#/"; + +/* These chars only start a comment at the beginning of a line. */ +const char line_comment_chars[] = "#/"; + +const char line_separator_chars[] = ";"; + +/* Chars that can be used to separate mant from exp in floating point nums. */ +const char EXP_CHARS[] = "eE"; + +/* Chars that mean this number is a floating point constant. */ +/* as in 0f123.456. */ +/* or 0H1.234E-12 (see exp chars above). */ +const char FLT_CHARS[] = "dDfF"; + +void pseudo_even (int); +void pseudo_bss (int); + +const pseudo_typeS md_pseudo_table[] = +{ + { "bss", pseudo_bss, 0 }, + { "even", pseudo_even, 0 }, + { 0, 0, 0 }, +}; + +static struct hash_control *insn_hash = NULL; + +static int +set_option (char *arg) +{ + int yes = 1; + + if (strcmp (arg, "all-extensions") == 0 + || strcmp (arg, "all") == 0) + { + memset (pdp11_extension, ~0, sizeof pdp11_extension); + pdp11_extension[PDP11_NONE] = 0; + return 1; + } + else if (strcmp (arg, "no-extensions") == 0) + { + memset (pdp11_extension, 0, sizeof pdp11_extension); + pdp11_extension[PDP11_BASIC] = 1; + return 1; + } + + if (strncmp (arg, "no-", 3) == 0) + { + yes = 0; + arg += 3; + } + + /* Commersial instructions. */ + if (strcmp (arg, "cis") == 0) + pdp11_extension[PDP11_CIS] = yes; + /* Call supervisor mode. */ + else if (strcmp (arg, "csm") == 0) + pdp11_extension[PDP11_CSM] = yes; + /* Extended instruction set. */ + else if (strcmp (arg, "eis") == 0) + pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes; + /* KEV11 floating-point. */ + else if (strcmp (arg, "fis") == 0 + || strcmp (arg, "kev11") == 0 + || strcmp (arg, "kev-11") == 0) + pdp11_extension[PDP11_FIS] = yes; + /* FP-11 floating-point. */ + else if (strcmp (arg, "fpp") == 0 + || strcmp (arg, "fpu") == 0 + || strcmp (arg, "fp11") == 0 + || strcmp (arg, "fp-11") == 0 + || strcmp (arg, "fpj11") == 0 + || strcmp (arg, "fp-j11") == 0 + || strcmp (arg, "fpj-11") == 0) + pdp11_extension[PDP11_FPP] = yes; + /* Limited extended insns. */ + else if (strcmp (arg, "limited-eis") == 0) + { + pdp11_extension[PDP11_LEIS] = yes; + if (!pdp11_extension[PDP11_LEIS]) + pdp11_extension[PDP11_EIS] = 0; + } + /* Move from processor type. */ + else if (strcmp (arg, "mfpt") == 0) + pdp11_extension[PDP11_MFPT] = yes; + /* Multiprocessor insns: */ + else if (strncmp (arg, "mproc", 5) == 0 + /* TSTSET, WRTLCK */ + || strncmp (arg, "multiproc", 9) == 0) + pdp11_extension[PDP11_MPROC] = yes; + /* Move from/to proc status. */ + else if (strcmp (arg, "mxps") == 0) + pdp11_extension[PDP11_MXPS] = yes; + /* Position-independent code. */ + else if (strcmp (arg, "pic") == 0) + asm_option[ASM_OPT_PIC] = yes; + /* Set priority level. */ + else if (strcmp (arg, "spl") == 0) + pdp11_extension[PDP11_SPL] = yes; + /* Microcode instructions: */ + else if (strcmp (arg, "ucode") == 0 + /* LDUB, MED, XFC */ + || strcmp (arg, "microcode") == 0) + pdp11_extension[PDP11_UCODE] = yes; + else + return 0; + + return 1; +} + + +static void +init_defaults (void) +{ + static int first = 1; + + if (first) + { + set_option ("all-extensions"); + set_option ("pic"); + first = 0; + } +} + +void +md_begin (void) +{ + int i; + + init_defaults (); + + insn_hash = hash_new (); + if (insn_hash == NULL) + as_fatal (_("Virtual memory exhausted")); + + for (i = 0; i < pdp11_num_opcodes; i++) + hash_insert (insn_hash, pdp11_opcodes[i].name, (void *) (pdp11_opcodes + i)); + for (i = 0; i < pdp11_num_aliases; i++) + hash_insert (insn_hash, pdp11_aliases[i].name, (void *) (pdp11_aliases + i)); +} + +void +md_number_to_chars (char con[], valueT value, int nbytes) +{ + /* On a PDP-11, 0x1234 is stored as "\x12\x34", and + 0x12345678 is stored as "\x56\x78\x12\x34". It's + anyones guess what 0x123456 would be stored like. */ + + switch (nbytes) + { + case 0: + break; + case 1: + con[0] = value & 0xff; + break; + case 2: + con[0] = value & 0xff; + con[1] = (value >> 8) & 0xff; + break; + case 4: + con[0] = (value >> 16) & 0xff; + con[1] = (value >> 24) & 0xff; + con[2] = value & 0xff; + con[3] = (value >> 8) & 0xff; + break; + default: + BAD_CASE (nbytes); + } +} + +/* Fix up some data or instructions after we find out the value of a symbol + that they reference. Knows about order of bytes in address. */ + +void +md_apply_fix (fixS *fixP, + valueT * valP, + segT seg ATTRIBUTE_UNUSED) +{ + valueT code; + valueT mask; + valueT val = * valP; + char *buf; + int shift; + int size; + + buf = fixP->fx_where + fixP->fx_frag->fr_literal; + size = fixP->fx_size; + code = md_chars_to_number ((unsigned char *) buf, size); + + switch (fixP->fx_r_type) + { + case BFD_RELOC_16: + case BFD_RELOC_16_PCREL: + mask = 0xffff; + shift = 0; + break; + case BFD_RELOC_PDP11_DISP_8_PCREL: + mask = 0x00ff; + shift = 1; + break; + case BFD_RELOC_PDP11_DISP_6_PCREL: + mask = 0x003f; + shift = 1; + val = -val; + break; + default: + BAD_CASE (fixP->fx_r_type); + } + + if (fixP->fx_addsy != NULL) + val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma; + /* *value += fixP->fx_addsy->bsym->section->vma; */ + + code &= ~mask; + code |= (val >> shift) & mask; + number_to_chars_littleendian (buf, code, size); + + if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) + fixP->fx_done = 1; +} + +long +md_chars_to_number (con, nbytes) + unsigned char con[]; /* Low order byte 1st. */ + int nbytes; /* Number of bytes in the input. */ +{ + /* On a PDP-11, 0x1234 is stored as "\x12\x34", and + 0x12345678 is stored as "\x56\x78\x12\x34". It's + anyones guess what 0x123456 would be stored like. */ + switch (nbytes) + { + case 0: + return 0; + case 1: + return con[0]; + case 2: + return (con[1] << BITS_PER_CHAR) | con[0]; + case 4: + return + (((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR)) + |((con[3] << BITS_PER_CHAR) | con[2]); + default: + BAD_CASE (nbytes); + return 0; + } +} + +static char * +skip_whitespace (char *str) +{ + while (*str == ' ' || *str == '\t') + str++; + return str; +} + +static char * +find_whitespace (char *str) +{ + while (*str != ' ' && *str != '\t' && *str != 0) + str++; + return str; +} + +static char * +parse_reg (char *str, struct pdp11_code *operand) +{ + str = skip_whitespace (str); + if (TOLOWER (*str) == 'r') + { + str++; + switch (*str) + { + case '0': case '1': case '2': case '3': + case '4': case '5': case '6': case '7': + operand->code = *str - '0'; + str++; + break; + default: + operand->error = _("Bad register name"); + return str - 1; + } + } + else if (strncmp (str, "sp", 2) == 0 + || strncmp (str, "SP", 2) == 0) + { + operand->code = 6; + str += 2; + } + else if (strncmp (str, "pc", 2) == 0 + || strncmp (str, "PC", 2) == 0) + { + operand->code = 7; + str += 2; + } + else + { + operand->error = _("Bad register name"); + return str; + } + + return str; +} + +static char * +parse_ac5 (char *str, struct pdp11_code *operand) +{ + str = skip_whitespace (str); + if (strncmp (str, "fr", 2) == 0 + || strncmp (str, "FR", 2) == 0 + || strncmp (str, "ac", 2) == 0 + || strncmp (str, "AC", 2) == 0) + { + str += 2; + switch (*str) + { + case '0': case '1': case '2': case '3': + case '4': case '5': + operand->code = *str - '0'; + str++; + break; + default: + operand->error = _("Bad register name"); + return str - 2; + } + } + else + { + operand->error = _("Bad register name"); + return str; + } + + return str; +} + +static char * +parse_ac (char *str, struct pdp11_code *operand) +{ + str = parse_ac5 (str, operand); + if (!operand->error && operand->code > 3) + { + operand->error = _("Bad register name"); + return str - 3; + } + + return str; +} + +static char * +parse_expression (char *str, struct pdp11_code *operand) +{ + char *save_input_line_pointer; + segT seg; + + save_input_line_pointer = input_line_pointer; + input_line_pointer = str; + seg = expression (&operand->reloc.exp); + if (seg == NULL) + { + input_line_pointer = save_input_line_pointer; + operand->error = _("Error in expression"); + return str; + } + + str = input_line_pointer; + input_line_pointer = save_input_line_pointer; + + operand->reloc.pc_rel = 0; + + return str; +} + +static char * +parse_op_no_deferred (char *str, struct pdp11_code *operand) +{ + LITTLENUM_TYPE literal_float[2]; + + str = skip_whitespace (str); + + switch (*str) + { + case '(': /* (rn) and (rn)+ */ + str = parse_reg (str + 1, operand); + if (operand->error) + return str; + str = skip_whitespace (str); + if (*str != ')') + { + operand->error = _("Missing ')'"); + return str; + } + str++; + if (*str == '+') + { + operand->code |= 020; + str++; + } + else + { + operand->code |= 010; + } + break; + + /* Immediate. */ + case '#': + case '$': + str = parse_expression (str + 1, operand); + if (operand->error) + return str; + operand->additional = TRUE; + operand->word = operand->reloc.exp.X_add_number; + switch (operand->reloc.exp.X_op) + { + case O_constant: + break; + case O_symbol: + case O_add: + case O_subtract: + operand->reloc.type = BFD_RELOC_16; + operand->reloc.pc_rel = 0; + break; + case O_big: + if (operand->reloc.exp.X_add_number > 0) + { + operand->error = _("Error in expression"); + break; + } + /* It's a floating literal... */ + know (operand->reloc.exp.X_add_number < 0); + flonum_gen2vax ('f', &generic_floating_point_number, literal_float); + operand->word = literal_float[0]; + if (literal_float[1] != 0) + as_warn (_("Low order bits truncated in immediate float operand")); + break; + default: + operand->error = _("Error in expression"); + break; + } + operand->code = 027; + break; + + /* label, d(rn), -(rn) */ + default: + { + if (strncmp (str, "-(", 2) == 0) /* -(rn) */ + { + str = parse_reg (str + 2, operand); + if (operand->error) + return str; + str = skip_whitespace (str); + if (*str != ')') + { + operand->error = _("Missing ')'"); + return str; + } + operand->code |= 040; + str++; + break; + } + + str = parse_expression (str, operand); + if (operand->error) + return str; + + str = skip_whitespace (str); + + if (*str != '(') + { + operand->code = 067; + operand->additional = 1; + operand->word = 0; + operand->reloc.type = BFD_RELOC_16_PCREL; + operand->reloc.pc_rel = 1; + break; + } + + /* d(rn) */ + str++; + str = parse_reg (str, operand); + if (operand->error) + return str; + + str = skip_whitespace (str); + + if (*str != ')') + { + operand->error = _("Missing ')'"); + return str; + } + + str++; + operand->additional = TRUE; + operand->code |= 060; + switch (operand->reloc.exp.X_op) + { + case O_symbol: + operand->reloc.type = BFD_RELOC_16; + operand->reloc.pc_rel = 0; + break; + case O_constant: + if ((operand->code & 7) == 7) + { + operand->reloc.pc_rel = 1; + operand->word = operand->reloc.exp.X_add_number; + } + else + operand->word = operand->reloc.exp.X_add_number; + + break; + default: + BAD_CASE (operand->reloc.exp.X_op); + } + break; + } + } + + return str; +} + +static char * +parse_op_noreg (char *str, struct pdp11_code *operand) +{ + str = skip_whitespace (str); + operand->error = NULL; + + if (*str == '@' || *str == '*') + { + str = parse_op_no_deferred (str + 1, operand); + if (operand->error) + return str; + operand->code |= 010; + } + else + str = parse_op_no_deferred (str, operand); + + return str; +} + +static char * +parse_op (char *str, struct pdp11_code *operand) +{ + str = skip_whitespace (str); + + str = parse_reg (str, operand); + if (!operand->error) + return str; + + operand->error = NULL; + parse_ac5 (str, operand); + if (!operand->error) + { + operand->error = _("Float AC not legal as integer operand"); + return str; + } + + return parse_op_noreg (str, operand); +} + +static char * +parse_fop (char *str, struct pdp11_code *operand) +{ + str = skip_whitespace (str); + + str = parse_ac5 (str, operand); + if (!operand->error) + return str; + + operand->error = NULL; + parse_reg (str, operand); + if (!operand->error) + { + operand->error = _("General register not legal as float operand"); + return str; + } + + return parse_op_noreg (str, operand); +} + +static char * +parse_separator (char *str, int *error) +{ + str = skip_whitespace (str); + *error = (*str != ','); + if (!*error) + str++; + return str; +} + +void +md_assemble (char *instruction_string) +{ + const struct pdp11_opcode *op; + struct pdp11_code insn, op1, op2; + int error; + int size; + char *err = NULL; + char *str; + char *p; + char c; + + str = skip_whitespace (instruction_string); + p = find_whitespace (str); + if (p - str == 0) + { + as_bad (_("No instruction found")); + return; + } + + c = *p; + *p = '\0'; + op = (struct pdp11_opcode *)hash_find (insn_hash, str); + *p = c; + if (op == 0) + { + as_bad (_("Unknown instruction '%s'"), str); + return; + } + + if (!pdp11_extension[op->extension]) + { + as_warn (_("Unsupported instruction set extension: %s"), op->name); + return; + } + + insn.error = NULL; + insn.code = op->opcode; + insn.reloc.type = BFD_RELOC_NONE; + op1.error = NULL; + op1.additional = FALSE; + op1.reloc.type = BFD_RELOC_NONE; + op2.error = NULL; + op2.additional = FALSE; + op2.reloc.type = BFD_RELOC_NONE; + + str = p; + size = 2; + + switch (op->type) + { + case PDP11_OPCODE_NO_OPS: + str = skip_whitespace (str); + if (*str == 0) + str = ""; + break; + + case PDP11_OPCODE_IMM3: + case PDP11_OPCODE_IMM6: + case PDP11_OPCODE_IMM8: + str = skip_whitespace (str); + if (*str == '#' || *str == '$') + str++; + str = parse_expression (str, &op1); + if (op1.error) + break; + if (op1.reloc.exp.X_op != O_constant || op1.reloc.type != BFD_RELOC_NONE) + { + op1.error = _("operand is not an absolute constant"); + break; + } + switch (op->type) + { + case PDP11_OPCODE_IMM3: + if (op1.reloc.exp.X_add_number & ~7) + { + op1.error = _("3-bit immediate out of range"); + break; + } + break; + case PDP11_OPCODE_IMM6: + if (op1.reloc.exp.X_add_number & ~0x3f) + { + op1.error = _("6-bit immediate out of range"); + break; + } + break; + case PDP11_OPCODE_IMM8: + if (op1.reloc.exp.X_add_number & ~0xff) + { + op1.error = _("8-bit immediate out of range"); + break; + } + break; + } + insn.code |= op1.reloc.exp.X_add_number; + break; + + case PDP11_OPCODE_DISPL: + { + char *new_pointer; + new_pointer = parse_expression (str, &op1); + op1.code = 0; + op1.reloc.pc_rel = 1; + op1.reloc.type = BFD_RELOC_PDP11_DISP_8_PCREL; + if (op1.reloc.exp.X_op != O_symbol) + { + op1.error = _("Symbol expected"); + break; + } + if (op1.code & ~0xff) + { + err = _("8-bit displacement out of range"); + break; + } + str = new_pointer; + insn.code |= op1.code; + insn.reloc = op1.reloc; + } + break; + + case PDP11_OPCODE_REG: + str = parse_reg (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + break; + + case PDP11_OPCODE_OP: + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + break; + + case PDP11_OPCODE_FOP: + str = parse_fop (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + break; + + case PDP11_OPCODE_REG_OP: + str = parse_reg (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + str = parse_separator (str, &error); + if (error) + { + op2.error = _("Missing ','"); + break; + } + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + break; + + case PDP11_OPCODE_REG_OP_REV: + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + str = parse_separator (str, &error); + if (error) + { + op2.error = _("Missing ','"); + break; + } + str = parse_reg (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + break; + + case PDP11_OPCODE_AC_FOP: + str = parse_ac (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + str = parse_separator (str, &error); + if (error) + { + op1.error = _("Missing ','"); + break; + } + str = parse_fop (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + break; + + case PDP11_OPCODE_FOP_AC: + str = parse_fop (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + str = parse_separator (str, &error); + if (error) + { + op1.error = _("Missing ','"); + break; + } + str = parse_ac (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + break; + + case PDP11_OPCODE_AC_OP: + str = parse_ac (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + str = parse_separator (str, &error); + if (error) + { + op1.error = _("Missing ','"); + break; + } + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + break; + + case PDP11_OPCODE_OP_AC: + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code; + if (op1.additional) + size += 2; + str = parse_separator (str, &error); + if (error) + { + op1.error = _("Missing ','"); + break; + } + str = parse_ac (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + break; + + case PDP11_OPCODE_OP_OP: + str = parse_op (str, &op1); + if (op1.error) + break; + insn.code |= op1.code << 6; + if (op1.additional) + size += 2; + str = parse_separator (str, &error); + if (error) + { + op2.error = _("Missing ','"); + break; + } + str = parse_op (str, &op2); + if (op2.error) + break; + insn.code |= op2.code; + if (op2.additional) + size += 2; + break; + + case PDP11_OPCODE_REG_DISPL: + { + char *new_pointer; + str = parse_reg (str, &op2); + if (op2.error) + break; + insn.code |= op2.code << 6; + str = parse_separator (str, &error); + if (error) + { + op1.error = _("Missing ','"); + break; + } + new_pointer = parse_expression (str, &op1); + op1.code = 0; + op1.reloc.pc_rel = 1; + op1.reloc.type = BFD_RELOC_PDP11_DISP_6_PCREL; + if (op1.reloc.exp.X_op != O_symbol) + { + op1.error = _("Symbol expected"); + break; + } + if (op1.code & ~0x3f) + { + err = _("6-bit displacement out of range"); + break; + } + str = new_pointer; + insn.code |= op1.code; + insn.reloc = op1.reloc; + } + break; + + default: + BAD_CASE (op->type); + } + + if (op1.error) + err = op1.error; + else if (op2.error) + err = op2.error; + else + { + str = skip_whitespace (str); + if (*str) + err = _("Too many operands"); + } + + { + char *to = NULL; + + if (err) + { + as_bad ("%s", err); + return; + } + + to = frag_more (size); + + md_number_to_chars (to, insn.code, 2); + if (insn.reloc.type != BFD_RELOC_NONE) + fix_new_exp (frag_now, to - frag_now->fr_literal, 2, + &insn.reloc.exp, insn.reloc.pc_rel, insn.reloc.type); + to += 2; + + if (op1.additional) + { + md_number_to_chars (to, op1.word, 2); + if (op1.reloc.type != BFD_RELOC_NONE) + fix_new_exp (frag_now, to - frag_now->fr_literal, 2, + &op1.reloc.exp, op1.reloc.pc_rel, op1.reloc.type); + to += 2; + } + + if (op2.additional) + { + md_number_to_chars (to, op2.word, 2); + if (op2.reloc.type != BFD_RELOC_NONE) + fix_new_exp (frag_now, to - frag_now->fr_literal, 2, + &op2.reloc.exp, op2.reloc.pc_rel, op2.reloc.type); + } + } +} + +int +md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED, + segT segment ATTRIBUTE_UNUSED) +{ + return 0; +} + +void +md_convert_frag (bfd *headers ATTRIBUTE_UNUSED, + segT seg ATTRIBUTE_UNUSED, + fragS *fragP ATTRIBUTE_UNUSED) +{ +} + +int md_short_jump_size = 2; +int md_long_jump_size = 4; + +void +md_create_short_jump (char *ptr ATTRIBUTE_UNUSED, + addressT from_addr ATTRIBUTE_UNUSED, + addressT to_addr ATTRIBUTE_UNUSED, + fragS *frag ATTRIBUTE_UNUSED, + symbolS *to_symbol ATTRIBUTE_UNUSED) +{ +} + +void +md_create_long_jump (char *ptr ATTRIBUTE_UNUSED, + addressT from_addr ATTRIBUTE_UNUSED, + addressT to_addr ATTRIBUTE_UNUSED, + fragS *frag ATTRIBUTE_UNUSED, + symbolS *to_symbol ATTRIBUTE_UNUSED) +{ +} + +static int +set_cpu_model (char *arg) +{ + char buf[4]; + char *model = buf; + + if (arg[0] == 'k') + arg++; + + *model++ = *arg++; + + if (strchr ("abdx", model[-1]) == NULL) + return 0; + + if (model[-1] == 'd') + { + if (arg[0] == 'f' || arg[0] == 'j') + model[-1] = *arg++; + } + else if (model[-1] == 'x') + { + if (arg[0] == 't') + model[-1] = *arg++; + } + + if (arg[0] == '-') + arg++; + + if (strncmp (arg, "11", 2) != 0) + return 0; + arg += 2; + + if (arg[0] == '-') + { + if (*++arg == 0) + return 0; + } + + /* Allow up to two revision letters. */ + if (arg[0] != 0) + *model++ = *arg++; + if (arg[0] != 0) + *model++ = *arg++; + + *model++ = 0; + + set_option ("no-extensions"); + + /* KA11 (11/15/20). */ + if (strncmp (buf, "a", 1) == 0) + return 1; /* No extensions. */ + + /* KB11 (11/45/50/55/70). */ + else if (strncmp (buf, "b", 1) == 0) + return set_option ("eis") && set_option ("spl"); + + /* KD11-A (11/35/40). */ + else if (strncmp (buf, "da", 2) == 0) + return set_option ("limited-eis"); + + /* KD11-B (11/05/10). */ + else if (strncmp (buf, "db", 2) == 0 + /* KD11-D (11/04). */ + || strncmp (buf, "dd", 2) == 0) + return 1; /* no extensions */ + + /* KD11-E (11/34). */ + else if (strncmp (buf, "de", 2) == 0) + return set_option ("eis") && set_option ("mxps"); + + /* KD11-F (11/03). */ + else if (strncmp (buf, "df", 2) == 0 + /* KD11-H (11/03). */ + || strncmp (buf, "dh", 2) == 0 + /* KD11-Q (11/03). */ + || strncmp (buf, "dq", 2) == 0) + return set_option ("limited-eis") && set_option ("mxps"); + + /* KD11-K (11/60). */ + else if (strncmp (buf, "dk", 2) == 0) + return set_option ("eis") + && set_option ("mxps") + && set_option ("ucode"); + + /* KD11-Z (11/44). */ + else if (strncmp (buf, "dz", 2) == 0) + return set_option ("csm") + && set_option ("eis") + && set_option ("mfpt") + && set_option ("mxps") + && set_option ("spl"); + + /* F11 (11/23/24). */ + else if (strncmp (buf, "f", 1) == 0) + return set_option ("eis") + && set_option ("mfpt") + && set_option ("mxps"); + + /* J11 (11/53/73/83/84/93/94). */ + else if (strncmp (buf, "j", 1) == 0) + return set_option ("csm") + && set_option ("eis") + && set_option ("mfpt") + && set_option ("multiproc") + && set_option ("mxps") + && set_option ("spl"); + + /* T11 (11/21). */ + else if (strncmp (buf, "t", 1) == 0) + return set_option ("limited-eis") + && set_option ("mxps"); + + else + return 0; +} + +static int +set_machine_model (char *arg) +{ + if (strncmp (arg, "pdp-11/", 7) != 0 + && strncmp (arg, "pdp11/", 6) != 0 + && strncmp (arg, "11/", 3) != 0) + return 0; + + if (strncmp (arg, "pdp", 3) == 0) + arg += 3; + if (arg[0] == '-') + arg++; + if (strncmp (arg, "11/", 3) == 0) + arg += 3; + + if (strcmp (arg, "03") == 0) + return set_cpu_model ("kd11f"); + + else if (strcmp (arg, "04") == 0) + return set_cpu_model ("kd11d"); + + else if (strcmp (arg, "05") == 0 + || strcmp (arg, "10") == 0) + return set_cpu_model ("kd11b"); + + else if (strcmp (arg, "15") == 0 + || strcmp (arg, "20") == 0) + return set_cpu_model ("ka11"); + + else if (strcmp (arg, "21") == 0) + return set_cpu_model ("t11"); + + else if (strcmp (arg, "23") == 0 + || strcmp (arg, "24") == 0) + return set_cpu_model ("f11"); + + else if (strcmp (arg, "34") == 0 + || strcmp (arg, "34a") == 0) + return set_cpu_model ("kd11e"); + + else if (strcmp (arg, "35") == 0 + || strcmp (arg, "40") == 0) + return set_cpu_model ("kd11da"); + + else if (strcmp (arg, "44") == 0) + return set_cpu_model ("kd11dz"); + + else if (strcmp (arg, "45") == 0 + || strcmp (arg, "50") == 0 + || strcmp (arg, "55") == 0 + || strcmp (arg, "70") == 0) + return set_cpu_model ("kb11"); + + else if (strcmp (arg, "60") == 0) + return set_cpu_model ("kd11k"); + + else if (strcmp (arg, "53") == 0 + || strcmp (arg, "73") == 0 + || strcmp (arg, "83") == 0 + || strcmp (arg, "84") == 0 + || strcmp (arg, "93") == 0 + || strcmp (arg, "94") == 0) + return set_cpu_model ("j11") + && set_option ("fpp"); + + else + return 0; +} + +const char *md_shortopts = "m:"; + +struct option md_longopts[] = +{ +#define OPTION_CPU 257 + { "cpu", required_argument, NULL, OPTION_CPU }, +#define OPTION_MACHINE 258 + { "machine", required_argument, NULL, OPTION_MACHINE }, +#define OPTION_PIC 259 + { "pic", no_argument, NULL, OPTION_PIC }, + { NULL, no_argument, NULL, 0 } +}; + +size_t md_longopts_size = sizeof (md_longopts); + +/* Invocation line includes a switch not recognized by the base assembler. + See if it's a processor-specific option. */ + +int +md_parse_option (int c, char *arg) +{ + init_defaults (); + + switch (c) + { + case 'm': + if (set_option (arg)) + return 1; + if (set_cpu_model (arg)) + return 1; + if (set_machine_model (arg)) + return 1; + break; + + case OPTION_CPU: + if (set_cpu_model (arg)) + return 1; + break; + + case OPTION_MACHINE: + if (set_machine_model (arg)) + return 1; + break; + + case OPTION_PIC: + if (set_option ("pic")) + return 1; + break; + + default: + break; + } + + return 0; +} + +void +md_show_usage (FILE *stream) +{ + fprintf (stream, "\ +\n\ +PDP-11 instruction set extentions:\n\ +\n\ +-m(no-)cis allow (disallow) commersial instruction set\n\ +-m(no-)csm allow (disallow) CSM instruction\n\ +-m(no-)eis allow (disallow) full extended instruction set\n\ +-m(no-)fis allow (disallow) KEV11 floating-point instructions\n\ +-m(no-)fpp allow (disallow) FP-11 floating-point instructions\n\ +-m(no-)fpu allow (disallow) FP-11 floating-point instructions\n\ +-m(no-)limited-eis allow (disallow) limited extended instruction set\n\ +-m(no-)mfpt allow (disallow) processor type instruction\n\ +-m(no-)multiproc allow (disallow) multiprocessor instructions\n\ +-m(no-)mxps allow (disallow) processor status instructions\n\ +-m(no-)spl allow (disallow) SPL instruction\n\ +-m(no-)ucode allow (disallow) microcode instructions\n\ +-mall-extensions allow all instruction set extensions\n\ + (this is the default)\n\ +-mno-extentions disallow all instruction set extensions\n\ +-pic generate position-indepenent code\n\ +\n\ +PDP-11 CPU model options:\n\ +\n\ +-mka11* KA11 CPU. base line instruction set only\n\ +-mkb11* KB11 CPU. enable full EIS and SPL\n\ +-mkd11a* KD11-A CPU. enable limited EIS\n\ +-mkd11b* KD11-B CPU. base line instruction set only\n\ +-mkd11d* KD11-D CPU. base line instruction set only\n\ +-mkd11e* KD11-E CPU. enable full EIS, MTPS, and MFPS\n\ +-mkd11f* KD11-F CPU. enable limited EIS, MTPS, and MFPS\n\ +-mkd11h* KD11-H CPU. enable limited EIS, MTPS, and MFPS\n\ +-mkd11q* KD11-Q CPU. enable limited EIS, MTPS, and MFPS\n\ +-mkd11k* KD11-K CPU. enable full EIS, MTPS, MFPS, LDUB, MED,\n\ + XFC, and MFPT\n\ +-mkd11z* KD11-Z CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ + and CSM\n\ +-mf11* F11 CPU. enable full EIS, MFPS, MTPS, and MFPT\n\ +-mj11* J11 CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ + CSM, TSTSET, and WRTLCK\n\ +-mt11* T11 CPU. enable limited EIS, MTPS, and MFPS\n\ +\n\ +PDP-11 machine model options:\n\ +\n\ +-m11/03 same as -mkd11f\n\ +-m11/04 same as -mkd11d\n\ +-m11/05 same as -mkd11b\n\ +-m11/10 same as -mkd11b\n\ +-m11/15 same as -mka11\n\ +-m11/20 same as -mka11\n\ +-m11/21 same as -mt11\n\ +-m11/23 same as -mf11\n\ +-m11/24 same as -mf11\n\ +-m11/34 same as -mkd11e\n\ +-m11/34a same as -mkd11e -mfpp\n\ +-m11/35 same as -mkd11a\n\ +-m11/40 same as -mkd11a\n\ +-m11/44 same as -mkd11z\n\ +-m11/45 same as -mkb11\n\ +-m11/50 same as -mkb11\n\ +-m11/53 same as -mj11\n\ +-m11/55 same as -mkb11\n\ +-m11/60 same as -mkd11k\n\ +-m11/70 same as -mkb11\n\ +-m11/73 same as -mj11\n\ +-m11/83 same as -mj11\n\ +-m11/84 same as -mj11\n\ +-m11/93 same as -mj11\n\ +-m11/94 same as -mj11\n\ +"); +} + +symbolS * +md_undefined_symbol (char *name ATTRIBUTE_UNUSED) +{ + return 0; +} + +valueT +md_section_align (segT segment ATTRIBUTE_UNUSED, + valueT size) +{ + return (size + 1) & ~1; +} + +long +md_pcrel_from (fixS *fixP) +{ + return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; +} + +/* Translate internal representation of relocation info to BFD target + format. */ + +arelent * +tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, + fixS *fixp) +{ + arelent *reloc; + bfd_reloc_code_real_type code; + + reloc = xmalloc (sizeof (* reloc)); + + reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); + *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); + reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; + + /* This is taken account for in md_apply_fix(). */ + reloc->addend = -symbol_get_bfdsym (fixp->fx_addsy)->section->vma; + + switch (fixp->fx_r_type) + { + case BFD_RELOC_16: + if (fixp->fx_pcrel) + code = BFD_RELOC_16_PCREL; + else + code = BFD_RELOC_16; + break; + + case BFD_RELOC_16_PCREL: + code = BFD_RELOC_16_PCREL; + break; + + default: + BAD_CASE (fixp->fx_r_type); + return NULL; + } + + reloc->howto = bfd_reloc_type_lookup (stdoutput, code); + + if (reloc->howto == NULL) + { + as_bad_where (fixp->fx_file, fixp->fx_line, + _("Can not represent %s relocation in this object file format"), + bfd_get_reloc_code_name (code)); + return NULL; + } + + return reloc; +} + +void +pseudo_bss (int c ATTRIBUTE_UNUSED) +{ + int temp; + + temp = get_absolute_expression (); + subseg_set (bss_section, temp); + demand_empty_rest_of_line (); +} + +void +pseudo_even (int c ATTRIBUTE_UNUSED) +{ + int alignment = 1; /* 2^1 */ + frag_align (alignment, 0, 1); + record_alignment (now_seg, alignment); +} + +char * +md_atof (int type, char * litP, int * sizeP) +{ + return vax_md_atof (type, litP, sizeP); +} |