/* tc-z8k.c -- Assemble code for the Zilog Z800n Copyright (C) 1992-2024 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. */ /* Written By Steve Chamberlain . */ #include "as.h" #include "safe-ctype.h" #define DEFINE_TABLE #include "opcodes/z8k-opc.h" const char comment_chars[] = "!"; const char line_comment_chars[] = "#"; const char line_separator_chars[] = ";"; extern int machine; extern int coff_flags; int segmented_mode; /* This is non-zero if target was set from the command line. If non-zero, 1 means Z8002 (non-segmented), 2 means Z8001 (segmented). */ static int z8k_target_from_cmdline; static void s_segm (int segm) { if (segm) { segmented_mode = 1; bfd_set_arch_mach (stdoutput, TARGET_ARCH, bfd_mach_z8001); } else { segmented_mode = 0; bfd_set_arch_mach (stdoutput, TARGET_ARCH, bfd_mach_z8002); } } static void even (int ignore ATTRIBUTE_UNUSED) { frag_align (1, 0, 0); record_alignment (now_seg, 1); } static int tohex (int c) { if (ISDIGIT (c)) return c - '0'; if (ISLOWER (c)) return c - 'a' + 10; return c - 'A' + 10; } static void sval (int ignore ATTRIBUTE_UNUSED) { SKIP_WHITESPACE (); if (*input_line_pointer == '\'') { int c; input_line_pointer++; c = *input_line_pointer++; while (c != '\'') { if (c == '%') { c = (tohex (input_line_pointer[0]) << 4) | tohex (input_line_pointer[1]); input_line_pointer += 2; } FRAG_APPEND_1_CHAR (c); c = *input_line_pointer++; } demand_empty_rest_of_line (); } } /* 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 */ const pseudo_typeS md_pseudo_table[] = { {"int" , cons , 2}, {"data.b" , cons , 1}, {"data.w" , cons , 2}, {"data.l" , cons , 4}, {"form" , listing_psize , 0}, {"heading", listing_title , 0}, {"import" , s_ignore , 0}, {"page" , listing_eject , 0}, {"program", s_ignore , 0}, {"z8001" , s_segm , 1}, {"z8002" , s_segm , 0}, {"segm" , s_segm , 1}, {"unsegm" , s_segm , 0}, {"unseg" , s_segm , 0}, {"name" , s_file , 0}, {"global" , s_globl , 0}, {"wval" , cons , 2}, {"lval" , cons , 4}, {"bval" , cons , 1}, {"sval" , sval , 0}, {"rsect" , obj_coff_section, 0}, {"sect" , obj_coff_section, 0}, {"block" , s_space , 0}, {"even" , even , 0}, {0 , 0 , 0} }; 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"; /* Opcode mnemonics. */ static htab_t opcode_hash_control; void md_begin (void) { const opcode_entry_type *opcode; unsigned int idx = -1u; opcode_hash_control = str_htab_create (); for (opcode = z8k_table; opcode->name; opcode++) { /* Only enter unique codes into the table. */ if (idx != opcode->idx) str_hash_insert (opcode_hash_control, opcode->name, opcode, 0); idx = opcode->idx; } /* Default to z8002. */ s_segm (z8k_target_from_cmdline ? z8k_target_from_cmdline - 1 : 0); /* Insert the pseudo ops, too. */ for (idx = 0; md_pseudo_table[idx].poc_name; idx++) { opcode_entry_type *fake_opcode; fake_opcode = XNEW (opcode_entry_type); fake_opcode->name = md_pseudo_table[idx].poc_name; fake_opcode->func = (void *) (md_pseudo_table + idx); fake_opcode->opcode = 250; str_hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode, 0); } } typedef struct z8k_op { /* CLASS_REG_xxx. */ int regsize; /* 0 .. 15. */ unsigned int reg; int mode; /* Any other register associated with the mode. */ unsigned int x_reg; /* Any expression. */ expressionS exp; } op_type; static expressionS *da_operand; static expressionS *imm_operand; static int reg[16]; static int the_cc; static int the_ctrl; static int the_flags; static int the_interrupt; /* Determine register number. src points to the ascii number (after "rl", "rh", "r", "rr", or "rq"). If a character outside the set of {0,',',')','('} follows the number, return NULL to indicate that it's not a valid register number. */ static char * whatreg (unsigned int *preg, char *src) { unsigned int new_reg; /* src[0] is already known to be a digit. */ if (ISDIGIT (src[1])) { new_reg = (src[0] - '0') * 10 + src[1] - '0'; src += 2; } else { new_reg = (src[0] - '0'); src += 1; } if (src[0] != 0 && src[0] != ',' && src[0] != '(' && src[0] != ')') return NULL; *preg = new_reg; return src; } /* Parse operands rh0-rh7, rl0-rl7 r0-r15 rr0-rr14 rq0--rq12 WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp r0l,r0h,..r7l,r7h @WREG @WREG+ @-WREG #const */ /* Try to parse a reg name. Return a pointer to the first character in SRC after the reg name. */ static char * parse_reg (char *src, int *mode, unsigned int *preg) { char *res = NULL; char regno; /* Check for stack pointer "sp" alias. */ if ((src[0] == 's' || src[0] == 'S') && (src[1] == 'p' || src[1] == 'P') && (src[2] == 0 || src[2] == ',')) { if (segmented_mode) { *mode = CLASS_REG_LONG; *preg = 14; } else { *mode = CLASS_REG_WORD; *preg = 15; } return src + 2; } if (src[0] == 'r' || src[0] == 'R') { if (src[1] == 'r' || src[1] == 'R') { if (src[2] < '0' || src[2] > '9') return NULL; /* Assume no register name but a label starting with 'rr'. */ *mode = CLASS_REG_LONG; res = whatreg (preg, src + 2); if (res == NULL) return NULL; /* Not a valid register name. */ regno = *preg; if (regno > 14) as_bad (_("register rr%d out of range"), regno); if (regno & 1) as_bad (_("register rr%d does not exist"), regno); } else if (src[1] == 'h' || src[1] == 'H') { if (src[2] < '0' || src[2] > '9') return NULL; /* Assume no register name but a label starting with 'rh'. */ *mode = CLASS_REG_BYTE; res = whatreg (preg, src + 2); if (res == NULL) return NULL; /* Not a valid register name. */ regno = *preg; if (regno > 7) as_bad (_("register rh%d out of range"), regno); } else if (src[1] == 'l' || src[1] == 'L') { if (src[2] < '0' || src[2] > '9') return NULL; /* Assume no register name but a label starting with 'rl'. */ *mode = CLASS_REG_BYTE; res = whatreg (preg, src + 2); if (res == NULL) return NULL; /* Not a valid register name. */ regno = *preg; if (regno > 7) as_bad (_("register rl%d out of range"), regno); *preg += 8; } else if (src[1] == 'q' || src[1] == 'Q') { if (src[2] < '0' || src[2] > '9') return NULL; /* Assume no register name but a label starting with 'rq'. */ *mode = CLASS_REG_QUAD; res = whatreg (preg, src + 2); if (res == NULL) return NULL; /* Not a valid register name. */ regno = *preg; if (regno > 12) as_bad (_("register rq%d out of range"), regno); if (regno & 3) as_bad (_("register rq%d does not exist"), regno); } else { if (src[1] < '0' || src[1] > '9') return NULL; /* Assume no register name but a label starting with 'r'. */ *mode = CLASS_REG_WORD; res = whatreg (preg, src + 1); if (res == NULL) return NULL; /* Not a valid register name. */ regno = *preg; if (regno > 15) as_bad (_("register r%d out of range"), regno); } } return res; } static char * parse_exp (char *s, expressionS *op) { char *save = input_line_pointer; char *new_pointer; input_line_pointer = s; expression (op); if (op->X_op == O_absent) as_bad (_("missing operand")); new_pointer = input_line_pointer; input_line_pointer = save; return new_pointer; } /* The many forms of operand: @r #exp exp exp(r) r(#exp) r(r) */ static char * checkfor (char *ptr, char what) { if (*ptr == what) ptr++; else as_bad (_("expected %c"), what); return ptr; } /* Make sure the mode supplied is the size of a word. */ static void regword (int mode, const char *string) { int ok; ok = CLASS_REG_WORD; if (ok != mode) { as_bad (_("register is wrong size for a word %s"), string); } } /* Make sure the mode supplied is the size of an address. */ static void regaddr (int mode, const char *string) { int ok; ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD; if (ok != mode) { as_bad (_("register is wrong size for address %s"), string); } } struct ctrl_names { int value; const char *name; }; static struct ctrl_names ctrl_table[] = { { 0x1, "flags" }, /* ldctlb only. */ { 0x2, "fcw" }, /* ldctl only. Applies to all remaining control registers. */ { 0x3, "refresh" }, { 0x4, "psapseg" }, { 0x5, "psapoff" }, { 0x5, "psap" }, { 0x6, "nspseg" }, { 0x7, "nspoff" }, { 0x7, "nsp" }, { 0 , 0 } }; static void get_ctrl_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED) { char *src = *ptr; int i, l; while (*src == ' ') src++; mode->mode = CLASS_CTRL; for (i = 0; ctrl_table[i].name; i++) { l = strlen (ctrl_table[i].name); if (! strncasecmp (ctrl_table[i].name, src, l)) { the_ctrl = ctrl_table[i].value; if (*(src + l) && *(src + l) != ',') break; *ptr = src + l; /* Valid control name found: "consume" it. */ return; } } the_ctrl = 0; } struct flag_names { int value; const char *name; }; static struct flag_names flag_table[] = { { 0x1, "P" }, { 0x1, "V" }, { 0x2, "S" }, { 0x4, "Z" }, { 0x8, "C" }, { 0x0, "+" }, { 0x0, "," }, { 0, 0 } }; static void get_flags_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED) { char *src = *ptr; char c; int i; int j; while (*src == ' ') src++; mode->mode = CLASS_FLAGS; the_flags = 0; for (j = 0; j <= 9; j++) { if (!src[j]) goto done; c = TOUPPER(src[j]); for (i = 0; flag_table[i].name; i++) { if (flag_table[i].name[0] == c) { the_flags = the_flags | flag_table[i].value; goto match; } } goto done; match: ; } done: *ptr = src + j; } struct interrupt_names { int value; const char *name; }; static struct interrupt_names intr_table[] = { { 0x1, "nvi" }, { 0x2, "vi" }, { 0x3, "both" }, { 0x3, "all" }, { 0, 0 } }; static void get_interrupt_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED) { char *src = *ptr; int i, l; while (*src == ' ') src++; mode->mode = CLASS_IMM; the_interrupt = 0; while (*src) { for (i = 0; intr_table[i].name; i++) { l = strlen (intr_table[i].name); if (! strncasecmp (intr_table[i].name, src, l)) { the_interrupt |= intr_table[i].value; if (*(src + l) && *(src + l) != ',') { *ptr = src + l; invalid: as_bad (_("unknown interrupt %s"), src); while (**ptr && ! is_end_of_line[(unsigned char) **ptr]) (*ptr)++; /* Consume rest of line. */ return; } src += l; if (! *src) { *ptr = src; return; } } } if (*src == ',') src++; else { *ptr = src; goto invalid; } } /* No interrupt type specified, opcode won't do anything. */ as_warn (_("opcode has no effect")); the_interrupt = 0x0; } struct cc_names { int value; const char *name; }; static struct cc_names table[] = { { 0x0, "f" }, { 0x1, "lt" }, { 0x2, "le" }, { 0x3, "ule" }, { 0x4, "ov/pe" }, { 0x4, "ov" }, { 0x4, "pe/ov" }, { 0x4, "pe" }, { 0x5, "mi" }, { 0x6, "eq" }, { 0x6, "z" }, { 0x7, "c/ult" }, { 0x7, "c" }, { 0x7, "ult/c" }, { 0x7, "ult" }, { 0x8, "t" }, { 0x9, "ge" }, { 0xa, "gt" }, { 0xb, "ugt" }, { 0xc, "nov/po" }, { 0xc, "nov" }, { 0xc, "po/nov" }, { 0xc, "po" }, { 0xd, "pl" }, { 0xe, "ne" }, { 0xe, "nz" }, { 0xf, "nc/uge" }, { 0xf, "nc" }, { 0xf, "uge/nc" }, { 0xf, "uge" }, { 0 , 0 } }; static void get_cc_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED) { char *src = *ptr; int i, l; while (*src == ' ') src++; mode->mode = CLASS_CC; for (i = 0; table[i].name; i++) { l = strlen (table[i].name); if (! strncasecmp (table[i].name, src, l)) { the_cc = table[i].value; if (*(src + l) && *(src + l) != ',') break; *ptr = src + l; /* Valid cc found: "consume" it. */ return; } } the_cc = 0x8; /* Not recognizing the cc defaults to t. (Assuming no cc present.) */ } static void get_operand (char **ptr, struct z8k_op *mode, unsigned int dst ATTRIBUTE_UNUSED) { char *src = *ptr; char *end; mode->mode = 0; while (*src == ' ') src++; if (*src == '#') { mode->mode = CLASS_IMM; imm_operand = &(mode->exp); src = parse_exp (src + 1, &(mode->exp)); } else if (*src == '@') { mode->mode = CLASS_IR; src = parse_reg (src + 1, &mode->regsize, &mode->reg); } else { unsigned int regn; end = parse_reg (src, &mode->mode, ®n); if (end) { int nw; unsigned int nr; src = end; if (*src == '(') { src++; end = parse_reg (src, &nw, &nr); if (end) { /* Got Ra(Rb). */ src = end; if (*src != ')') as_bad (_("Missing ) in ra(rb)")); else src++; regaddr (mode->mode, "ra(rb) ra"); mode->mode = CLASS_BX; mode->reg = regn; mode->x_reg = nr; reg[ARG_RX] = nr; } else { /* Got Ra(disp). */ if (*src == '#') src++; src = parse_exp (src, &(mode->exp)); src = checkfor (src, ')'); mode->mode = CLASS_BA; mode->reg = regn; mode->x_reg = 0; imm_operand = &(mode->exp); } } else { mode->reg = regn; mode->x_reg = 0; } } else { /* No initial reg. */ src = parse_exp (src, &(mode->exp)); if (*src == '(') { src++; end = parse_reg (src, &(mode->mode), ®n); regword (mode->mode, "addr(Ra) ra"); mode->mode = CLASS_X; mode->reg = regn; mode->x_reg = 0; da_operand = &(mode->exp); src = checkfor (end, ')'); } else { /* Just an address. */ mode->mode = CLASS_DA; mode->reg = 0; mode->x_reg = 0; da_operand = &(mode->exp); } } } *ptr = src; } static char * get_operands (const opcode_entry_type *opcode, char *op_end, op_type *operand) { char *ptr = op_end; char *savptr; switch (opcode->noperands) { case 0: operand[0].mode = 0; operand[1].mode = 0; while (*ptr == ' ') ptr++; break; case 1: if (opcode->arg_info[0] == CLASS_CC) { get_cc_operand (&ptr, operand + 0, 0); while (*ptr == ' ') ptr++; if (*ptr && ! is_end_of_line[(unsigned char) *ptr]) { as_bad (_("invalid condition code '%s'"), ptr); while (*ptr && ! is_end_of_line[(unsigned char) *ptr]) ptr++; /* Consume rest of line. */ } } else if (opcode->arg_info[0] == CLASS_FLAGS) { get_flags_operand (&ptr, operand + 0, 0); while (*ptr == ' ') ptr++; if (*ptr && ! is_end_of_line[(unsigned char) *ptr]) { as_bad (_("invalid flag '%s'"), ptr); while (*ptr && ! is_end_of_line[(unsigned char) *ptr]) ptr++; /* Consume rest of line. */ } } else if (opcode->arg_info[0] == (CLASS_IMM + (ARG_IMM2))) get_interrupt_operand (&ptr, operand + 0, 0); else get_operand (&ptr, operand + 0, 0); operand[1].mode = 0; break; case 2: savptr = ptr; if (opcode->arg_info[0] == CLASS_CC) { get_cc_operand (&ptr, operand + 0, 0); while (*ptr == ' ') ptr++; if (*ptr != ',' && strchr (ptr + 1, ',')) { savptr = ptr; while (*ptr != ',') ptr++; *ptr = 0; ptr++; as_bad (_("invalid condition code '%s'"), savptr); } } else if (opcode->arg_info[0] == CLASS_CTRL) { get_ctrl_operand (&ptr, operand + 0, 0); if (the_ctrl == 0) { ptr = savptr; get_operand (&ptr, operand + 0, 0); if (ptr == 0) return NULL; if (*ptr == ',') ptr++; get_ctrl_operand (&ptr, operand + 1, 1); if (the_ctrl == 0) return NULL; return ptr; } } else get_operand (&ptr, operand + 0, 0); if (ptr == 0) return NULL; if (*ptr == ',') ptr++; get_operand (&ptr, operand + 1, 1); break; case 3: get_operand (&ptr, operand + 0, 0); if (*ptr == ',') ptr++; get_operand (&ptr, operand + 1, 1); if (*ptr == ',') ptr++; get_operand (&ptr, operand + 2, 2); break; case 4: get_operand (&ptr, operand + 0, 0); if (*ptr == ',') ptr++; get_operand (&ptr, operand + 1, 1); if (*ptr == ',') ptr++; get_operand (&ptr, operand + 2, 2); if (*ptr == ',') ptr++; get_cc_operand (&ptr, operand + 3, 3); break; default: abort (); } return ptr; } /* Passed a pointer to a list of opcodes which use different addressing modes. Return the opcode which matches the opcodes provided. */ static opcode_entry_type * get_specific (opcode_entry_type *opcode, op_type *operands) { opcode_entry_type *this_try = opcode; int found = 0; unsigned int noperands = opcode->noperands; unsigned int this_index = opcode->idx; while (this_index == opcode->idx && !found) { unsigned int i; this_try = opcode++; for (i = 0; i < noperands; i++) { unsigned int mode = operands[i].mode; if (((mode & CLASS_MASK) == CLASS_IR) && ((this_try->arg_info[i] & CLASS_MASK) == CLASS_IRO)) { mode = operands[i].mode = (operands[i].mode & ~CLASS_MASK) | CLASS_IRO; } if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK)) { /* It could be a pc rel operand, if this is a da mode and we like disps, then insert it. */ if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP) { /* This is the case. */ operands[i].mode = CLASS_DISP; } else if (mode == CLASS_BA && this_try->arg_info[i]) { /* Can't think of a way to turn what we've been given into something that's OK. */ goto fail; } else if (this_try->arg_info[i] & CLASS_PR) { if (mode == CLASS_REG_LONG && segmented_mode) { /* OK. */ } else if (mode == CLASS_REG_WORD && !segmented_mode) { /* OK. */ } else goto fail; } else goto fail; } switch (mode & CLASS_MASK) { default: break; case CLASS_IRO: if (operands[i].regsize != CLASS_REG_WORD) as_bad (_("invalid indirect register size")); reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg; break; case CLASS_IR: if ((segmented_mode && operands[i].regsize != CLASS_REG_LONG) || (!segmented_mode && operands[i].regsize != CLASS_REG_WORD)) as_bad (_("invalid indirect register size")); reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg; break; case CLASS_X: case CLASS_BA: case CLASS_BX: case CLASS_DISP: case CLASS_REG: case CLASS_REG_WORD: case CLASS_REG_BYTE: case CLASS_REG_QUAD: case CLASS_REG_LONG: case CLASS_REGN0: reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg; break; case CLASS_CTRL: if (this_try->opcode == OPC_ldctlb && the_ctrl != 1) as_bad (_("invalid control register name")); break; } } found = 1; fail: ; } if (found) return this_try; else return 0; } static unsigned char buffer[20]; static void newfix (int ptr, bfd_reloc_code_real_type type, int size, expressionS *operand) { fixS *fixP; /* Size is in nibbles. */ if (operand->X_add_symbol || operand->X_op_symbol || operand->X_add_number) { int is_pcrel; switch(type) { case BFD_RELOC_8_PCREL: case BFD_RELOC_Z8K_CALLR: case BFD_RELOC_Z8K_DISP7: is_pcrel = 1; break; default: is_pcrel = 0; break; } fixP = fix_new_exp (frag_now, ptr, size / 2, operand, is_pcrel, type); if (is_pcrel) fixP->fx_no_overflow = 1; } } static unsigned char * apply_fix (unsigned char *ptr, bfd_reloc_code_real_type type, expressionS *operand, int size) { long n = operand->X_add_number; /* size is in nibbles. */ newfix ((ptr - buffer) / 2, type, size + 1, operand); if (type == BFD_RELOC_Z8K_DISP7) { /* 2 nibbles, but most significant bit is part of the opcode == 7 bits. */ *ptr++ = (n >> 4) & 7; *ptr++ = n >> 0; } else { switch (size) { case 8: /* 8 nibbles == 32 bits. */ *ptr++ = n >> 28; *ptr++ = n >> 24; *ptr++ = n >> 20; *ptr++ = n >> 16; /* Fall through. */ case 4: /* 4 nibbles == 16 bits. */ *ptr++ = n >> 12; *ptr++ = n >> 8; /* Fall through. */ case 2: *ptr++ = n >> 4; /* Fall through. */ case 1: *ptr++ = n >> 0; break; } } return ptr; } /* Now we know what sort of opcodes it is. Let's build the bytes. */ static void build_bytes (opcode_entry_type *this_try, struct z8k_op *operand ATTRIBUTE_UNUSED) { unsigned char *output_ptr = buffer; int c; int nibble; unsigned int *class_ptr; frag_wane (frag_now); frag_new (0); if (frag_room () < 8) frag_grow (8); /* Make room for maximum instruction size. */ memset (buffer, 0, sizeof (buffer)); class_ptr = this_try->byte_info; for (nibble = 0; (c = *class_ptr++); nibble++) { switch (c & CLASS_MASK) { default: abort (); case CLASS_ADDRESS: /* Direct address, we don't cope with the SS mode right now. */ if (segmented_mode) { /* da_operand->X_add_number |= 0x80000000; -- Now set at relocation time. */ output_ptr = apply_fix (output_ptr, BFD_RELOC_32, da_operand, 8); } else { output_ptr = apply_fix (output_ptr, BFD_RELOC_16, da_operand, 4); } da_operand = 0; break; case CLASS_DISP8: /* pc rel 8 bit */ output_ptr = apply_fix (output_ptr, BFD_RELOC_8_PCREL, da_operand, 2); da_operand = 0; break; case CLASS_0DISP7: /* pc rel 7 bit */ *output_ptr = 0; output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_DISP7, da_operand, 2); da_operand = 0; break; case CLASS_1DISP7: /* pc rel 7 bit */ *output_ptr = 0x80; output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_DISP7, da_operand, 2); output_ptr[-2] = 0x8; da_operand = 0; break; case CLASS_BIT_1OR2: *output_ptr = c & 0xf; if (imm_operand) { if (imm_operand->X_add_number == 2) *output_ptr |= 2; else if (imm_operand->X_add_number != 1) as_bad (_("immediate must be 1 or 2")); } else as_bad (_("immediate 1 or 2 expected")); output_ptr++; break; case CLASS_CC: *output_ptr++ = the_cc; break; case CLASS_0CCC: if (the_ctrl < 2 || the_ctrl > 7) as_bad (_("invalid control register name")); *output_ptr++ = the_ctrl; break; case CLASS_1CCC: if (the_ctrl < 2 || the_ctrl > 7) as_bad (_("invalid control register name")); *output_ptr++ = the_ctrl | 0x8; break; case CLASS_00II: *output_ptr++ = (~the_interrupt & 0x3); break; case CLASS_01II: *output_ptr++ = (~the_interrupt & 0x3) | 0x4; break; case CLASS_FLAGS: *output_ptr++ = the_flags; break; case CLASS_IGNORE: case CLASS_BIT: *output_ptr++ = c & 0xf; break; case CLASS_REGN0: if (reg[c & 0xf] == 0) as_bad (_("can't use R0 here")); /* Fall through. */ case CLASS_REG: case CLASS_REG_BYTE: case CLASS_REG_WORD: case CLASS_REG_LONG: case CLASS_REG_QUAD: /* Insert bit pattern of right reg. */ *output_ptr++ = reg[c & 0xf]; break; case CLASS_DISP: switch (c & ARG_MASK) { case ARG_DISP12: output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_CALLR, da_operand, 4); break; case ARG_DISP16: output_ptr = apply_fix (output_ptr, BFD_RELOC_16_PCREL, da_operand, 4); break; default: output_ptr = apply_fix (output_ptr, BFD_RELOC_16, da_operand, 4); } da_operand = 0; break; case CLASS_IMM: { switch (c & ARG_MASK) { case ARG_NIM4: if (imm_operand->X_add_number > 15) as_bad (_("immediate value out of range")); imm_operand->X_add_number = -imm_operand->X_add_number; output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_IMM4L, imm_operand, 1); break; /*case ARG_IMMNMINUS1: not used. */ case ARG_IMM4M1: imm_operand->X_add_number--; /* Fall through. */ case ARG_IMM4: if (imm_operand->X_add_number > 15) as_bad (_("immediate value out of range")); output_ptr = apply_fix (output_ptr, BFD_RELOC_Z8K_IMM4L, imm_operand, 1); break; case ARG_NIM8: imm_operand->X_add_number = -imm_operand->X_add_number; /* Fall through. */ case ARG_IMM8: output_ptr = apply_fix (output_ptr, BFD_RELOC_8, imm_operand, 2); break; case ARG_IMM16: output_ptr = apply_fix (output_ptr, BFD_RELOC_16, imm_operand, 4); break; case ARG_IMM32: output_ptr = apply_fix (output_ptr, BFD_RELOC_32, imm_operand, 8); break; default: abort (); } } } } /* Copy from the nibble buffer into the frag. */ { int length = (output_ptr - buffer) / 2; unsigned char *src = buffer; unsigned char *fragp = (unsigned char *) frag_more (length); while (src < output_ptr) { *fragp = ((src[0] & 0xf) << 4) | (src[1] & 0xf); src += 2; fragp++; } } } /* 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 (char *str) { char c; char *op_start; char *op_end; struct z8k_op operand[4]; opcode_entry_type *opcode; /* Drop leading whitespace. */ while (*str == ' ') str++; /* Find the op code end. */ for (op_start = op_end = str; *op_end != 0 && *op_end != ' ' && ! is_end_of_line[(unsigned char) *op_end]; op_end++) ; if (op_end == op_start) { as_bad (_("can't find opcode ")); } c = *op_end; *op_end = 0; /* Zero-terminate op code string for str_hash_find() call. */ opcode = (opcode_entry_type *) str_hash_find (opcode_hash_control, op_start); if (opcode == NULL) { as_bad (_("unknown opcode")); return; } *op_end = c; /* Restore original string. */ if (opcode->opcode == 250) { pseudo_typeS *p; char oc; char *old = input_line_pointer; /* Was really a pseudo op. */ input_line_pointer = op_end; oc = *old; *old = '\n'; while (*input_line_pointer == ' ') input_line_pointer++; p = (pseudo_typeS *) (opcode->func); (p->poc_handler) (p->poc_val); input_line_pointer = old; *old = oc; } else { char *new_input_line_pointer; new_input_line_pointer = get_operands (opcode, op_end, operand); if (new_input_line_pointer) { input_line_pointer = new_input_line_pointer; opcode = get_specific (opcode, operand); } if (new_input_line_pointer == NULL || opcode == NULL) { /* Couldn't find an opcode which matched the operands. */ char *where = frag_more (2); where[0] = 0x0; where[1] = 0x0; as_bad (_("Can't find opcode to match operands")); return; } build_bytes (opcode, operand); } } /* We have no need to default values of symbols. */ symbolS * md_undefined_symbol (char *name ATTRIBUTE_UNUSED) { return 0; } /* Various routines to kill one day. */ const char * md_atof (int type, char *litP, int *sizeP) { return ieee_md_atof (type, litP, sizeP, true); } const char md_shortopts[] = "z:"; const struct option md_longopts[] = { #define OPTION_RELAX (OPTION_MD_BASE) {"linkrelax", no_argument, NULL, OPTION_RELAX}, {NULL, no_argument, NULL, 0} }; const size_t md_longopts_size = sizeof (md_longopts); int md_parse_option (int c, const char *arg) { switch (c) { case 'z': if (!strcmp (arg, "8001")) z8k_target_from_cmdline = 2; else if (!strcmp (arg, "8002")) z8k_target_from_cmdline = 1; else { as_bad (_("invalid architecture -z%s"), arg); return 0; } break; case OPTION_RELAX: linkrelax = 1; break; default: return 0; } return 1; } void md_show_usage (FILE *stream) { fprintf (stream, _("\ Z8K options:\n\ -z8001 generate segmented code\n\ -z8002 generate unsegmented code\n\ -linkrelax create linker relaxable code\n")); } void md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT sec ATTRIBUTE_UNUSED, fragS *fragP ATTRIBUTE_UNUSED) { printf (_("call to md_convert_frag\n")); abort (); } /* Generate a machine dependent reloc from a fixup. */ arelent* tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp ATTRIBUTE_UNUSED) { arelent *reloc; reloc = XNEW (arelent); reloc->sym_ptr_ptr = XNEW (asymbol *); *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; reloc->addend = fixp->fx_offset; reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); if (! reloc->howto) { as_bad_where (fixp->fx_file, fixp->fx_line, _("Cannot represent %s relocation in object file"), bfd_get_reloc_code_name (fixp->fx_r_type)); abort (); } return reloc; } valueT md_section_align (segT seg, valueT size) { int align = bfd_section_alignment (seg); valueT mask = ((valueT) 1 << align) - 1; return (size + mask) & ~mask; } /* Attempt to simplify or eliminate a fixup. To indicate that a fixup has been eliminated, set fix->fx_done. If fix->fx_addsy is non-NULL, we will have to generate a reloc entry. */ void md_apply_fix (fixS *fixP, valueT *valP, segT segment ATTRIBUTE_UNUSED) { long val = * (long *) valP; char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; switch (fixP->fx_r_type) { case BFD_RELOC_Z8K_IMM4L: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else buf[0] = (buf[0] & 0xf0) | (val & 0xf); break; case BFD_RELOC_8: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else *buf++ = val; break; case BFD_RELOC_16: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { *buf++ = (val >> 8); *buf++ = val; } break; case BFD_RELOC_32: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { *buf++ = (val >> 24); *buf++ = (val >> 16); *buf++ = (val >> 8); *buf++ = val; } break; case BFD_RELOC_8_PCREL: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { if (val & 1) as_bad_where (fixP->fx_file, fixP->fx_line, _("cannot branch to odd address")); val /= 2; if (val > 127 || val < -128) as_bad_where (fixP->fx_file, fixP->fx_line, _("relative jump out of range")); *buf++ = val; fixP->fx_no_overflow = 1; fixP->fx_done = 1; } break; case BFD_RELOC_16_PCREL: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { val = val - fixP->fx_frag->fr_address + fixP->fx_where - fixP->fx_size; if (val > 32767 || val < -32768) as_bad_where (fixP->fx_file, fixP->fx_line, _("relative address out of range")); *buf++ = (val >> 8); *buf++ = val; fixP->fx_no_overflow = 1; fixP->fx_done = 1; } break; case BFD_RELOC_Z8K_CALLR: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { if (val & 1) as_bad_where (fixP->fx_file, fixP->fx_line, _("cannot branch to odd address")); if (val > 4096 || val < -4095) as_bad_where (fixP->fx_file, fixP->fx_line, _("relative call out of range")); val = -val / 2; *buf = (*buf & 0xf0) | ((val >> 8) & 0xf); buf++; *buf++ = val & 0xff; fixP->fx_no_overflow = 1; fixP->fx_done = 1; } break; case BFD_RELOC_Z8K_DISP7: if (fixP->fx_addsy) { fixP->fx_no_overflow = 1; fixP->fx_done = 0; } else { if (val & 1) as_bad_where (fixP->fx_file, fixP->fx_line, _("cannot branch to odd address")); val /= 2; if (val > 0 || val < -127) as_bad_where (fixP->fx_file, fixP->fx_line, _("relative jump out of range")); *buf = (*buf & 0x80) | (-val & 0x7f); fixP->fx_no_overflow = 1; fixP->fx_done = 1; } break; default: printf(_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type); abort (); } if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) fixP->fx_done = 1; } int md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED, segT segment_type ATTRIBUTE_UNUSED) { printf (_("call to md_estimate_size_before_relax\n")); abort (); } /* Put number into target byte order. */ void md_number_to_chars (char *ptr, valueT use, int nbytes) { number_to_chars_bigendian (ptr, use, nbytes); } /* On the Z8000, a PC-relative offset is relative to the address of the instruction plus its size. */ long md_pcrel_from (fixS *fixP) { return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; } void tc_coff_symbol_emit_hook (symbolS *s ATTRIBUTE_UNUSED) { }