示例#1
0
文件: syntax.c 项目: kusma/vasm
static void handle_datadef(char *s,int sz)
{
  for (;;) {
    char *opstart = s;
    operand *op;
    dblock *db = NULL;

    if (OPSZ_BITS(sz)==8 && (*s=='\"' || *s=='\'')) {
      if (db = parse_string(&opstart,*s,8)) {
        add_atom(0,new_data_atom(db,1));
        s = opstart;
      }
    }
    if (!db) {
      op = new_operand();
      s = skip_operand(s);
      if (parse_operand(opstart,s-opstart,op,DATA_OPERAND(sz)))
        add_atom(0,new_datadef_atom(OPSZ_BITS(sz),op));
      else
        syntax_error(8);  /* invalid data operand */
    }

    s = skip(s);
    if (*s == ',')
      s = skip(s+1);
    else
      break;
  }
}
示例#2
0
static void handle_text(char *s)
{
  char *opstart = s;
  operand *op;
  dblock *db = NULL;

  if (db = parse_string(&opstart,*s,8)) {
    add_atom(0,new_data_atom(db,1));
    s = opstart;
  }
  if (!db) {
    op = new_operand();
    s = skip_operand(s);
    if (parse_operand(opstart,s-opstart,op,DATA_OPERAND(8))) {
      atom *a;

      a = new_datadef_atom(8,op);
      a->align = 1;
      add_atom(0,a);
    }
    else
      syntax_error(8);  /* invalid data operand */
  }
  eol(s);
}
示例#3
0
static void handle_data_offset(char *s,int size,int offset)
{
  for (;;) {
    char *opstart = s;
    operand *op;
    dblock *db = NULL;

    if (size==8 && (*s=='\"' || *s=='\'')) {
      if (db = parse_string(&opstart,*s,8)) {
        if (offset != 0) {
          int i;

          for (i=0; i<db->size; i++)
            db->data[i] = db->data[i] + offset;
        }
        add_atom(0,new_data_atom(db,1));
        s = opstart;
      }
    }
    if (!db) {
      op = new_operand();
      s = skip_operand(s);
      if (parse_operand(opstart,s-opstart,op,DATA_OPERAND(size))) {
        atom *a;

        if (offset != 0)
          op->value = make_expr(ADD,number_expr(offset),op->value);
        a = new_datadef_atom(abs(size),op);
        a->align = 1;
        add_atom(0,a);
      }
      else
        syntax_error(8);  /* invalid data operand */
    }

    s = skip(s);
    if (*s == ',') {
      s = skip(s+1);
    }
    else if (*s == commentchar) {
      break;
    }
    else if (*s) {
      syntax_error(9);  /* , expected */
      return;
    }
    else
      break;
  }

  eol(s);
}
示例#4
0
文件: syntax.c 项目: ezrec/vasm
static void stab_entry(char *name,int type,int othr,int desc,char *s)
{
  section *stabs;

  if (!(stabs = find_section(stabname,stabattr))) {
    section *str;
    dblock *db;

    stabs = new_section(stabname,stabattr,4);
    if (!(str = find_section(stabstrname,stabstrattr))) {
      str = new_section(stabstrname,stabstrattr,1);
    }
    else {
      if (str->pc != 0)
        ierror(0);
    }
    /* first byte of .stabstr is 0 */
    add_atom(str,new_space_atom(number_expr(1),1,0)); 
    /* compilation unit header has to be patched by output module */
    new_stabstr(getfilename());
    db = new_dblock();
    db->size = 12;
    db->data = mymalloc(12);
    add_atom(stabs,new_data_atom(db,1));
  }

  add_const_datadef(stabs,name?new_stabstr(name):0,32,1);
  add_const_datadef(stabs,type,8,1);
  add_const_datadef(stabs,othr,8,1);
  add_const_datadef(stabs,desc,16,1);
  if (s) {
    operand *op = new_operand();
    int len = oplen(skip_operand(s),s);

    if (parse_operand(s,len,op,DATA_OPERAND(32))) {
      atom *a = new_datadef_atom(32,op);

      a->align = 1;
      add_atom(stabs,a);
    }
    else
      syntax_error(8);
  }
  else
    add_atom(stabs,new_space_atom(number_expr(4),1,0));  /* no value */
}
示例#5
0
文件: syntax.c 项目: ezrec/vasm
static void handle_data(char *s,int size,int noalign)
{
  for (;;) {
    char *opstart = s;
    operand *op;
    dblock *db = NULL;

    if ((size==8 || size==16) && *s=='\"') {
      if (db = parse_string(&opstart,*s,size)) {
        add_atom(0,new_data_atom(db,1));
        s = opstart;
      }
    }
    if (!db) {
      op = new_operand();
      s = skip_operand(s);
      if (parse_operand(opstart,s-opstart,op,DATA_OPERAND(size))) {
        atom *a;

        a = new_datadef_atom(size,op);
        if (noalign)
          a->align=1;
        add_atom(0,a);
      }
      else
        syntax_error(8);  /* invalid data operand */
    }

    s = skip(s);
    if (*s == ',') {
      s = skip(s+1);
    }
    else if (*s==commentchar)
      break;
    else if (*s) {
      syntax_error(9);  /* , expected */
      return;
    }
    else
      break;
  }

  eol(s);
}
示例#6
0
文件: syntax.c 项目: ezrec/vasm
static void add_const_datadef(section *s,taddr val,int size,int align)
{
  char buf[32];
  int len;
  operand *op;

  if (size <= 32) {
    len = sprintf(buf,"%ld",(long)val);
    op = new_operand();
    if (parse_operand(buf,len,op,DATA_OPERAND(size))) {
      atom *a = new_datadef_atom(size,op);

      a->align = align;
      add_atom(s,a);
    }
    else
      syntax_error(8);
  }
  else
    ierror(0);
}
示例#7
0
文件: syntax.c 项目: ezrec/vasm
static void handle_data(char *s,int size,int noalign,int zeroterm)
{
  expr *tree;
  dblock *db;
  do{
    char *opstart=s;
    operand *op;
    if(size==8&&*s=='\"'){
      s=string(s,&db);
      add_atom(0,new_data_atom(db,1));
    }else{
      op=new_operand();
      s=skip_operand(s);
      if(!parse_operand(opstart,s-opstart,op,DATA_OPERAND(size))){
        syntax_error(8);
      }else{
        atom *a=new_datadef_atom(size,op);
        if(noalign)
          a->align=1;
        add_atom(0,a);
      }
    }
    s=skip(s);
    if(*s==','){
      s=skip(s+1);
    }else if(*s)
      syntax_error(9);
  }while(*s);
  if(zeroterm){
    if(size!=8)
      ierror(0);
    db=new_dblock();
    db->size=1;
    db->data=mymalloc(1);
    *db->data=0;
    add_atom(0,new_data_atom(db,1));
  }    
  eol(s);
}