/* this function simply checks to see if the user has changed the order,
and if so, updates the matrix */
void
new_rot_order()
{
if ((rotorder_var = lookup_global(ROTORDER_NAME)) < 0)
{
rotorder_var = add_global(ROTORDER_NAME);
globals(rotorder_var)->value.real = 4.;
globals(rotorder_var)->flags = ORDINARY_PARAM | RECALC_PARAMETER | ALWAYS_RECALC;
}
rotorder = (int)globals(rotorder_var)->value.real;
if ((genpower_var = lookup_global(GENPOWER_NAME)) < 0)
{
genpower_var = add_global(GENPOWER_NAME);
globals(genpower_var)->value.real = 1.;
globals(genpower_var)->flags = ORDINARY_PARAM | RECALC_PARAMETER | ALWAYS_RECALC;
}
genpower = (int)globals(genpower_var)->value.real;
rotmat[0][0] = rotmat[1][1] = cos(2*M_PI*genpower/rotorder);
rotmat[1][0] = -(rotmat[0][1] = sin(2*M_PI*genpower/rotorder));
}
static void
extern_name(char *name1, char *name2, tree *symbol)
{
char buffer[BUFSIZ];
if (name2)
sprintf(buffer, "%s_%s", name1, name2);
else
sprintf(buffer, "%s", name1);
fprintf(state.output.f, " extern %s\n", buffer);
add_global(buffer, buffer, symbol);
return;
}
/**
* Process the buffer
* Return TRUE to exit program
*/
int process_buf(char **bufargs) {
struct Command *cmd;
int argc = 0;
/* cd command*/
if (!strcmp(bufargs[0], "cd") && bufargs[0][2] == '\0') {
set_cwd(bufargs[1]);
return FALSE;
}
/* exit command */
if (!strcmp(bufargs[0], "exit") && bufargs[0][4] == '\0') {
return TRUE;
}
/* Get argc */
while (bufargs[argc++] != ARR_END);
/* Set up command and first process */
cmd = init_command();
cmd->procHead = init_process(argc * sizeof(char *));
cmd->runningProcs++;
/* Allocate arguments to their processes within the command */
if (allocate_args(argc, bufargs, cmd) == TRUE) {
/* Invalid command */
free_command(NULL, cmd);
return FALSE;
}
/* Add the command to the global commands */
add_global(cmd);
/* For each process in the command, fork it and set it up as running */
fork_command(cmd);
/* If foreground command, then wait on processes */
if (cmd->type == FG) {
wait_running(cmd);
/* set the foreground command to null and clean it */
globalCmd[FG] = NULL;
free_command(NULL, cmd);
}
return FALSE;
}
int main()
{
#if 1
int x = 10,
y = 20;
int z;
int *px = &x,
*py = &y;
z = add_global();
printf("add_global = %d\n",z);
z = add_p(px,py);
printf("add_p = %d\n",z);
z = add(x,y);
printf("add = %d\n",z);
#endif
}
static void
write_declarations(void)
{
entity *entity_list = NULL;
tree *current = NULL;
int first_time = 1;
tree *list;
tree *symbol;
entity_list = state.list;
while (entity_list != NULL) {
current = entity_list->node;
if ((current->tag == node_decl) &&
(current->value.decl.storage != EXTERN_STORAGE)) {
if ((current->value.decl.type == CONST_TYPE) &&
(current->value.decl.storage != 0)) {
gp_error("constants can't be public or volatile");
}
/* FIXME: only bytes are supported so far */
assert(current->value.decl.size == BYTE_SIZE);
if (first_time) {
fprintf(state.output.f, "; declarations \n");
fprintf(state.output.f, " udata\n");
first_time = 0;
}
for (list = current->value.decl.expr; list; list = TAIL(list)) {
symbol = HEAD(list);
assert(symbol->tag == node_symbol);
if (current->value.decl.type == VAR_TYPE) {
fprintf(state.output.f, "%s res 1\n", symbol->value.symbol);
if (current->value.decl.storage == PUBLIC_STORAGE)
fprintf(state.output.f, " global %s\n", symbol->value.symbol);
}
add_global(symbol->value.symbol, symbol->value.symbol, current);
}
}
entity_list = entity_list->next;
}
if (!first_time)
fprintf(state.output.f, "\n");
}
static char *get_tok (char *buf, int doall, FILE *fp_net) {
/* Figures out which, if any token is at the start of this line and *
* takes the appropriate action. It always returns a pointer to *
* the next line (I need to do this so I can do some lookahead). */
char *ptr;
ptr = my_strtok(buf,TOKENS,fp_net,buf);
if (ptr == NULL) { /* Empty line. Skip. */
ptr = my_fgets(buf, BUFSIZE, fp_net);
return (ptr);
}
if (strcmp(ptr,".clb") == 0) {
ptr = add_clb (doall, fp_net, buf);
return (ptr);
}
if (strcmp(ptr,".input") == 0) {
add_io (doall, INPAD, fp_net, buf);
ptr = my_fgets(buf, BUFSIZE, fp_net);
return (ptr);
}
if (strcmp(ptr,".output") == 0) {
add_io (doall, OUTPAD, fp_net, buf);
ptr = my_fgets(buf, BUFSIZE, fp_net);
return (ptr);
}
if (strcmp(ptr,".global") == 0) {
add_global (doall, fp_net, buf);
ptr = my_fgets(buf, BUFSIZE, fp_net);
return (ptr);
}
printf ("Error in get_tok while parsing netlist file.\n");
printf ("Line %d starts with an invalid token (%s).\n", linenum, ptr);
exit (1);
}
static void
write_decl(tree *decl, char *name)
{
tree *list;
tree *symbol;
char alias[BUFSIZ];
assert(decl->tag == node_decl);
list = decl->value.decl.expr;
assert(list->tag == node_list);
for (; list; list = TAIL(list)) {
symbol = HEAD(list);
assert(symbol->tag == node_symbol);
sprintf(alias, "%s_%s", name, symbol->value.symbol);
add_global(symbol->value.symbol, alias, symbol);
if (decl->value.decl.type == VAR_TYPE) {
fprintf(state.output.f, "%s res 1\n", alias);
}
}
}
void newfunc_typed(int storage, char *n, int type)
{
int idx;
SYMBOL *symbol;
char an[NAMESIZE];
fexitlab = getlabel();
if ((idx = find_global(n)) > -1) {
symbol = &symbol_table[idx];
if (symbol->identity != FUNCTION)
multidef(n);
} else {
/* extern implies global scope */
idx = add_global(n, FUNCTION, CINT, 0, storage == EXTERN ? PUBLIC : storage);
symbol = &symbol_table[idx];
}
local_table_index = NUMBER_OF_GLOBALS; //locptr = STARTLOC;
argstk = 0;
// ANSI style argument declaration
if (doAnsiArguments()) {
if (storage == EXTERN) {
need_semicolon();
return;
}
/* No body .. just a definition */
if (match(";"))
return;
} else {
// K&R style argument declaration
while (!match(")")) {
if (symname(an)) {
if (find_locale(an) > -1)
multidef(an);
else {
/* FIXME: struct */
add_local(an, 0, 0, argstk, AUTO);
argstk = argstk + INTSIZE;
}
} else {
error("illegal argument name");
junk();
}
blanks();
if (!streq(line + lptr, ")")) {
if (!match(","))
error("expected comma");
}
if (endst())
break;
}
if (storage == EXTERN) {
need_semicolon();
return;
}
/* No body .. just a definition */
if (match(";"))
return;
stkp = 0;
argtop = argstk;
while (argstk) {
if ((type = get_type()) != -1) {
notvoid(type);
getarg(type);
need_semicolon();
} else {
error("wrong number args");
break;
}
}
}
if (symbol->offset == FUNCTION)
multidef(n);
symbol->offset = FUNCTION;
output_string(n);
output_label_terminator();
newline();
gen_prologue();
statement(YES);
print_label(fexitlab);
output_label_terminator();
newline();
gen_epilogue();
gen_modify_stack(0);
gen_ret();
stkp = 0;
local_table_index = NUMBER_OF_GLOBALS; //locptr = STARTLOC;
}
/**
* declare a static variable
* @param type
* @param storage
* @param mtag tag of struct whose members are being declared, or zero
* @param otag tag of struct object being declared. only matters if mtag is non-zero
* @param is_struct struct or union or no meaning
* @return 1 if a function was parsed
*/
int declare_global(int type, int storage, TAG_SYMBOL *mtag, int otag, int is_struct) {
int dim, identity;
char sname[NAMESIZE];
FOREVER {
FOREVER {
if (endst ())
return 0;
dim = 1;
if (match ("*")) {
identity = POINTER;
} else {
identity = VARIABLE;
}
if (!symname (sname))
illname ();
if (match ("(")) {
/* FIXME: We need to deal with pointer types properly here */
if (identity == POINTER)
type = CINT;
newfunc_typed(storage, sname, type);
/* Can't int foo(x){blah),a=4; */
return 1;
}
/* FIXME: we need to deal with extern properly here */
if (find_global (sname) > -1)
multidef (sname);
if (identity == VARIABLE)
notvoid(type);
if (match ("[")) {
dim = needsub ();
//if (dim || storage == EXTERN) {
identity = ARRAY;
//} else {
// identity = POINTER;
//}
}
// add symbol
if (mtag == 0) { // real variable, not a struct/union member
identity = initials(sname, type, identity, dim, otag);
add_global (sname, identity, type, (dim == 0 ? -1 : dim), storage);
if (type == STRUCT) {
symbol_table[current_symbol_table_idx].tagidx = otag;
}
break;
} else if (is_struct) {
// structure member, mtag->size is offset
add_member(sname, identity, type, mtag->size, storage);
// store (correctly scaled) size of member in tag table entry
if (identity == POINTER)
type = CINT;
scale_const(type, otag, &dim);
mtag->size += dim;
}
else {
// union member, offset is always zero
add_member(sname, identity, type, 0, storage);
// store maximum member size in tag table entry
if (identity == POINTER)
type = CINT;
scale_const(type, otag, &dim);
if (mtag->size < dim)
mtag->size = dim;
}
}
if (!match (","))
return 0;
}
}
static void
scan_c_stream (FILE *infile)
{
int commas, minargs, maxargs;
int c = '\n';
while (!feof (infile))
{
bool doc_keyword = false;
bool defunflag = false;
bool defvarperbufferflag = false;
bool defvarflag = false;
enum global_type type = INVALID;
static char *name;
static ptrdiff_t name_size;
if (c != '\n' && c != '\r')
{
c = getc (infile);
continue;
}
c = getc (infile);
if (c == ' ')
{
while (c == ' ')
c = getc (infile);
if (c != 'D')
continue;
c = getc (infile);
if (c != 'E')
continue;
c = getc (infile);
if (c != 'F')
continue;
c = getc (infile);
if (c == 'S')
{
c = getc (infile);
if (c != 'Y')
continue;
c = getc (infile);
if (c != 'M')
continue;
c = getc (infile);
if (c != ' ' && c != '\t' && c != '(')
continue;
type = SYMBOL;
}
else if (c == 'V')
{
c = getc (infile);
if (c != 'A')
continue;
c = getc (infile);
if (c != 'R')
continue;
c = getc (infile);
if (c != '_')
continue;
defvarflag = true;
c = getc (infile);
defvarperbufferflag = (c == 'P');
if (generate_globals)
{
if (c == 'I')
type = EMACS_INTEGER;
else if (c == 'L')
type = LISP_OBJECT;
else if (c == 'B')
type = BOOLEAN;
}
c = getc (infile);
/* We need to distinguish between DEFVAR_BOOL and
DEFVAR_BUFFER_DEFAULTS. */
if (generate_globals && type == BOOLEAN && c != 'O')
type = INVALID;
}
else
continue;
}
else if (c == 'D')
{
c = getc (infile);
if (c != 'E')
continue;
c = getc (infile);
if (c != 'F')
continue;
c = getc (infile);
defunflag = c == 'U';
}
else continue;
if (generate_globals
&& (!defvarflag || defvarperbufferflag || type == INVALID)
&& !defunflag && type != SYMBOL)
continue;
while (c != '(')
{
if (c < 0)
goto eof;
c = getc (infile);
}
if (type != SYMBOL)
{
/* Lisp variable or function name. */
c = getc (infile);
if (c != '"')
continue;
c = read_c_string_or_comment (infile, -1, false, 0);
}
if (generate_globals)
{
ptrdiff_t i = 0;
char const *svalue = 0;
/* Skip "," and whitespace. */
do
{
c = getc (infile);
}
while (c == ',' || c == ' ' || c == '\t' || c == '\n' || c == '\r');
/* Read in the identifier. */
do
{
if (c < 0)
goto eof;
input_buffer[i++] = c;
c = getc (infile);
}
while (! (c == ',' || c == ' ' || c == '\t'
|| c == '\n' || c == '\r'));
input_buffer[i] = '\0';
if (name_size <= i)
{
free (name);
name_size = i + 1;
ptrdiff_t doubled;
if (! INT_MULTIPLY_WRAPV (name_size, 2, &doubled)
&& doubled <= SIZE_MAX)
name_size = doubled;
name = xmalloc (name_size);
}
memcpy (name, input_buffer, i + 1);
if (type == SYMBOL)
{
do
c = getc (infile);
while (c == ' ' || c == '\t' || c == '\n' || c == '\r');
if (c != '"')
continue;
c = read_c_string_or_comment (infile, -1, false, 0);
svalue = input_buffer;
}
if (!defunflag)
{
add_global (type, name, 0, svalue);
continue;
}
}
if (type == SYMBOL)
continue;
/* DEFVAR_LISP ("name", addr, "doc")
DEFVAR_LISP ("name", addr /\* doc *\/)
DEFVAR_LISP ("name", addr, doc: /\* doc *\/) */
if (defunflag)
commas = generate_globals ? 4 : 5;
else if (defvarperbufferflag)
commas = 3;
else if (defvarflag)
commas = 1;
else /* For DEFSIMPLE and DEFPRED. */
commas = 2;
while (commas)
{
if (c == ',')
{
commas--;
if (defunflag && (commas == 1 || commas == 2))
{
int scanned = 0;
do
c = getc (infile);
while (c == ' ' || c == '\n' || c == '\r' || c == '\t');
if (c < 0)
goto eof;
ungetc (c, infile);
if (commas == 2) /* Pick up minargs. */
scanned = fscanf (infile, "%d", &minargs);
else /* Pick up maxargs. */
if (c == 'M' || c == 'U') /* MANY || UNEVALLED */
{
if (generate_globals)
maxargs = (c == 'M') ? -1 : -2;
else
maxargs = -1;
}
else
scanned = fscanf (infile, "%d", &maxargs);
if (scanned < 0)
goto eof;
}
}
if (c == EOF)
goto eof;
c = getc (infile);
}
if (generate_globals)
{
struct global *g = add_global (FUNCTION, name, maxargs, 0);
if (!g)
continue;
/* The following code tries to recognize function attributes
specified after the docstring, e.g.:
DEFUN ("foo", Ffoo, Sfoo, X, Y, Z,
doc: /\* doc *\/
attributes: attribute1 attribute2 ...)
(Lisp_Object arg...)
Now only 'noreturn' and 'const' attributes are used. */
/* Advance to the end of docstring. */
c = getc (infile);
if (c == EOF)
goto eof;
int d = getc (infile);
if (d == EOF)
goto eof;
while (1)
{
if (c == '*' && d == '/')
break;
c = d, d = getc (infile);
if (d == EOF)
goto eof;
}
/* Skip spaces, if any. */
do
{
c = getc (infile);
if (c == EOF)
goto eof;
}
while (c == ' ' || c == '\n' || c == '\r' || c == '\t');
/* Check for 'attributes:' token. */
if (c == 'a' && stream_match (infile, "ttributes:"))
{
char *p = input_buffer;
/* Collect attributes up to ')'. */
while (1)
{
c = getc (infile);
if (c == EOF)
goto eof;
if (c == ')')
break;
if (p - input_buffer > sizeof (input_buffer))
abort ();
*p++ = c;
}
*p = 0;
if (strstr (input_buffer, "noreturn"))
g->flags |= DEFUN_noreturn;
if (strstr (input_buffer, "const"))
g->flags |= DEFUN_const;
}
continue;
}
while (c == ' ' || c == '\n' || c == '\r' || c == '\t')
c = getc (infile);
if (c == '"')
c = read_c_string_or_comment (infile, 0, false, 0);
while (c != EOF && c != ',' && c != '/')
c = getc (infile);
if (c == ',')
{
c = getc (infile);
while (c == ' ' || c == '\n' || c == '\r' || c == '\t')
c = getc (infile);
while ((c >= 'a' && c <= 'z') || (c >= 'Z' && c <= 'Z'))
c = getc (infile);
if (c == ':')
{
doc_keyword = true;
c = getc (infile);
while (c == ' ' || c == '\n' || c == '\r' || c == '\t')
c = getc (infile);
}
}
if (c == '"'
|| (c == '/'
&& (c = getc (infile),
ungetc (c, infile),
c == '*')))
{
bool comment = c != '"';
bool saw_usage;
printf ("\037%c%s\n", defvarflag ? 'V' : 'F', input_buffer);
if (comment)
getc (infile); /* Skip past `*'. */
c = read_c_string_or_comment (infile, 1, comment, &saw_usage);
/* If this is a defun, find the arguments and print them. If
this function takes MANY or UNEVALLED args, then the C source
won't give the names of the arguments, so we shouldn't bother
trying to find them.
Various doc-string styles:
0: DEFUN (..., "DOC") (args) [!comment]
1: DEFUN (..., /\* DOC *\/ (args)) [comment && !doc_keyword]
2: DEFUN (..., doc: /\* DOC *\/) (args) [comment && doc_keyword]
*/
if (defunflag && maxargs != -1 && !saw_usage)
{
char argbuf[1024], *p = argbuf;
if (!comment || doc_keyword)
while (c != ')')
{
if (c < 0)
goto eof;
c = getc (infile);
}
/* Skip into arguments. */
while (c != '(')
{
if (c < 0)
goto eof;
c = getc (infile);
}
/* Copy arguments into ARGBUF. */
*p++ = c;
do
*p++ = c = getc (infile);
while (c != ')');
*p = '\0';
/* Output them. */
fputs ("\n\n", stdout);
write_c_args (input_buffer, argbuf, minargs, maxargs);
}
else if (defunflag && maxargs == -1 && !saw_usage)
/* The DOC should provide the usage form. */
fprintf (stderr, "Missing 'usage' for function '%s'.\n",
input_buffer);
}
}
eof:
if (ferror (infile) || fclose (infile) != 0)
fatal ("read error");
}
int primary(LVALUE *lval) {
char sname[NAMESIZE];
int num[1], k, symbol_table_idx, offset, reg;
SYMBOL *symbol;
lval->ptr_type = 0; // clear pointer/array type
lval->tagsym = 0;
if (match ("(")) {
k = hier1 (lval);
needbrack (")");
return (k);
}
if (amatch("sizeof", 6)) {
needbrack("(");
gen_immediate();
if (amatch("int", 3)) output_number(INTSIZE);
else if (amatch("char", 4)) output_number(1);
else if (symname(sname)) {
if (((symbol_table_idx = find_locale(sname)) > -1) ||
((symbol_table_idx = find_global(sname)) > -1)) {
symbol = &symbol_table[symbol_table_idx];
if (symbol->storage == LSTATIC)
error("sizeof local static");
offset = symbol->offset;
if ((symbol->type & CINT) ||
(symbol->identity == POINTER))
offset *= INTSIZE;
else if (symbol->type == STRUCT)
offset *= tag_table[symbol->tagidx].size;
output_number(offset);
} else {
error("sizeof undeclared variable");
output_number(0);
}
} else {
error("sizeof only on type or variable");
}
needbrack(")");
newline();
lval->symbol = 0;
lval->indirect = 0;
return(0);
}
if (symname (sname)) {
if ((symbol_table_idx = find_locale(sname)) > -1) {
symbol = &symbol_table[symbol_table_idx];
reg = gen_get_locale(symbol);
lval->symbol = symbol;
lval->indirect = symbol->type;
if (symbol->type == STRUCT) {
lval->tagsym = &tag_table[symbol->tagidx];
}
if (symbol->identity == ARRAY ||
(symbol->identity == VARIABLE && symbol->type == STRUCT)) {
lval->ptr_type = symbol->type;
return reg;
}
if (symbol->identity == POINTER) {
lval->indirect = CINT;
lval->ptr_type = symbol->type;
}
return FETCH | reg;
}
if ((symbol_table_idx = find_global(sname)) > -1) {
symbol = &symbol_table[symbol_table_idx];
if (symbol->identity != FUNCTION) {
lval->symbol = symbol;
lval->indirect = 0;
if (symbol->type == STRUCT) {
lval->tagsym = &tag_table[symbol->tagidx];
}
if (symbol->identity != ARRAY &&
(symbol->identity != VARIABLE || symbol->type != STRUCT)) {
if (symbol->identity == POINTER) {
lval->ptr_type = symbol->type;
}
return FETCH | HL_REG;
}
gen_immediate();
output_string(symbol->name);
newline();
lval->indirect = symbol->type;
lval->ptr_type = symbol->type;
return 0;
}
}
blanks();
if (ch() != '(')
error("undeclared variable");
symbol_table_idx = add_global(sname, FUNCTION, CINT, 0, PUBLIC);
symbol = &symbol_table[symbol_table_idx];
lval->symbol = symbol;
lval->indirect = 0;
return 0;
}
lval->symbol = 0;
lval->indirect = 0;
if (constant(num))
return 0;
else {
error("invalid expression");
gen_immediate();
output_number(0);
newline();
junk();
return 0;
}
}
glxlink::glxlink(char *filename)
{
bool ok = true;
globals = NULL;
imports = NULL;
exports = NULL;
objects = NULL;
handle = NULL;
settag = NULL;
init = NULL;
sync = NULL;
term = NULL;
glxflags = 0;
valid_to = 0;
last_t = 0;
FILE *fp = fopen(filename,"rt");
if ( fp==NULL )
throw "file open failed";
output_debug("opened link '%s'", filename);
char line[1024];
int linenum=0;
while ( fgets(line,sizeof(line),fp)!=NULL )
{
linenum++;
if ( line[0]=='#' ) continue;
char tag[64], data[1024]="";
if ( sscanf(line,"%s %[^\r\n]",tag,data)>0 )
{
output_debug("%s(%d): %s %s", filename, linenum, tag,data);
if ( settag!=NULL )
{
if ( strcmp(tag,"global")==0 )
{
add_global(data);
}
else if ( strcmp(tag,"object")==0 )
{
add_object(data);
}
else if ( strcmp(tag,"export")==0 )
{
add_export(data);
}
else if ( strcmp(tag,"import")==0 )
{
add_import(data);
}
else if ( !(*settag)(this,tag,data) )
output_error("%s(%d): tag '%s' not accepted", filename, linenum, tag);
}
else if ( strcmp(tag,"target")==0)
{
if ( !set_target(data) )
{
output_error("%s(%d): target '%s' is not valid", filename, linenum, data);
ok = false;
}
}
else
output_warning("%s(%d): tag '%s' cannot be processed until target module is loaded", filename, linenum, tag);
}
}
fclose(fp);
// append to link list
next = first;
first = this;
if ( ok )
output_verbose("link '%s' ok", filename);
else
throw "cannot establish link";
}
primary (lvalue_t *lval)
{
char sname[NAMESIZE];
int num[1], k, symbol_table_idx, offset, reg;
symbol_t *symbol;
lval->ptr_type = 0; /* clear pointer/array type */
if (match ("(")) {
k = hier1 (lval);
needbrack (")");
return (k);
}
if (amatch("sizeof", 6)) {
needbrack("(");
gen_immediate_c();
if (amatch("int", 3)) output_number(INTSIZE);
else if (amatch("char", 4)) output_number(1);
else if (symname(sname)) {
if ((symbol_table_idx = findloc(sname)) ||
(symbol_table_idx = findglb(sname))) {
symbol = &symbol_table[symbol_table_idx];
if (symbol->storage == LSTATIC)
error("sizeof local static");
offset = symbol->count;
if ((symbol->type & CINT) ||
(symbol->identity == POINTER))
offset *= INTSIZE;
output_number(offset);
} else {
error("sizeof undeclared variable");
output_number(0);
}
} else {
error("sizeof only on simple type or variable");
}
needbrack(")");
newline();
lval->symbol = 0;
lval->indirect = 0;
return(0);
}
if (symname (sname)) {
if (symbol_table_idx = findloc (sname)) {
symbol = &symbol_table[symbol_table_idx];
reg = gen_get_location (symbol);
lval->symbol = symbol;
lval->indirect = symbol->type;
if (symbol->identity == ARRAY) {
//lval->ptr_type = symbol->type;
lval->ptr_type = 0;
return 0;
}
if (symbol->identity == POINTER) {
lval->indirect = UINT;
lval->ptr_type = symbol->type;
}
return reg;
}
if (symbol_table_idx = findglb (sname)) {
symbol = &symbol_table[symbol_table_idx];
lval->symbol = symbol;
switch (symbol->identity) {
case ARRAY:
gen_immediate_a ();
output_string (symbol->name);
newline ();
/* Fall through */
case FUNCTION:
lval->indirect = lval->ptr_type = symbol_table[symbol_table_idx].type;
lval->ptr_type = 0;
return 0;
default:
lval->indirect = 0;
if (symbol->identity == POINTER) {
lval->ptr_type = symbol->type;
}
return 1;
}
}
blanks ();
if (ch() != '(')
error("undeclared variable");
symbol_table_idx = add_global (sname, FUNCTION, CINT, 0, PUBLIC, 1);
symbol = &symbol_table[symbol_table_idx];
lval->symbol = symbol;
lval->indirect = 0;
return 0;
}
if (constant (num)) {
lval->symbol = 0;
lval->indirect = 0;
return 0;
}
error ("invalid expression");
gen_immediate_c ();
output_number(0);
newline ();
junk ();
return 0;
}
static void
write_procedure(tree *procedure, int is_func)
{
tree *head;
tree *body;
char *name;
tree *args;
tree *decl;
tree *statements;
tree *argument;
int i;
int storage;
if (is_func) {
head = procedure->value.func.head;
storage = procedure->value.func.storage;
body = procedure->value.func.body;
} else {
head = procedure->value.proc.head;
storage = procedure->value.proc.storage;
body = procedure->value.proc.body;
}
if (storage == EXTERN_STORAGE)
return;
assert(head->tag == node_head);
assert(body->tag == node_body);
name = head->value.head.name;
args = head->value.head.args;
decl = body->value.body.decl;
statements = body->value.body.statements;
if (is_func) {
fprintf(state.output.f, "; function %s\n", name);
} else {
fprintf(state.output.f, "; procedure %s\n", name);
}
/* data memory section */
if ((args != NULL) || (decl != NULL)) {
fprintf(state.output.f, ".udata_%s udata\n", name);
/* the procedure or function has arguments */
if (args != NULL) {
assert(args->tag == node_list);
for (; args; args = TAIL(args)) {
argument = HEAD(args);
assert(argument->tag == node_decl);
assert(argument->value.decl.type == 0);
assert(argument->value.decl.storage == 0);
/* FIXME: only bytes are supported so far */
assert(argument->value.decl.size == BYTE_SIZE);
write_decl(argument, name);
}
}
/* the procedure or function has local variables */
if (decl != NULL) {
assert(decl->tag == node_list);
for (; decl; decl = TAIL(decl)) {
argument = HEAD(decl);
assert(argument->tag == node_decl);
assert(argument->value.decl.storage == 0);
/* FIXME: only bytes are supported so far */
assert(argument->value.decl.size == BYTE_SIZE);
if (argument->value.decl.type == VAR_TYPE)
write_decl(argument, name);
}
}
fprintf(state.output.f, "\n");
}
/* program memory section */
fprintf(state.output.f, ".code_%s code\n", name);
add_global(name, name, procedure);
write_label(name);
if (storage == PUBLIC_STORAGE)
fprintf(state.output.f, " global %s\n", name);
max_temp_number = 0;
write_statements(statements);
fprintf(state.output.f, " return\n");
fprintf(state.output.f, "\n");
/* temp data section */
if (max_temp_number) {
/* FIXME: overlay this if possible */
fprintf(state.output.f, ".udata_%s_temp udata\n", name);
for(i = 0; i < max_temp_number; i++)
fprintf(state.output.f, "_temp_%d res 1\n", i);
fprintf(state.output.f, "\n");
}
}
// Register global and local symbols for resolving
int register_symbols()
{
DEBUG(( stderr, "register_symbols started\n" ));
object *o = root_obj; // process all objects
while( o )
{
// get object's symtab
section *s = o->get_section_by_type( SHT_SYMTAB );
if( !s ) warning( "object '%s' got no symbol table!!! (skipped)", o->filename );
else
{
// get object's strtab
section *strtab = o->sections;
while( strtab )
{
if( (strtab->header->sh_type == SHT_STRTAB) && (strtab->header->sh_name == s->header->sh_link) ) break;
strtab = strtab->next;
}
if( !strtab ) warning( "object '%s' got no symbol string table!!! (skipped)", o->filename );
else
{
int nsyms = s->header->sh_size / s->header->sh_entsize;
while( nsyms-- )
{
Elf32_Sym *sym = (Elf32_Sym *)(s->contents + nsyms * s->header->sh_entsize);
if( sym->st_shndx == 0 ) continue; // undefined symbol, will resolve later
if( sym->st_name == 0 ) continue; // unnamed symbol, can do nothing about it
// find symbol name
char *name = strtab->contents + sym->st_name;
switch( ELF32_ST_BIND(sym->st_info) )
{
case STB_LOCAL:
o->add_local( name, sym );
break;
case STB_GLOBAL:
case STB_WEAK:
add_global( name, sym, o );
break;
default:
warning( "unknown symbol binding %d in object '%s'", ELF32_ST_BIND(sym->st_info), o->filename );
}
}
}
}
o = o->next;
}
DEBUG(( stderr, "register_symbols finished\n" ));
return errors;
}
int arrange_sections()
{
object *p;
section *s, *last;
DEBUG(( stderr, "arrange_sections: arranging text sections\n" ));
comp.text.start = text_offset = 0;
// arrange text sections
for( unsigned int i = 0; i < countof(text_sections_names); i++ )
{
if( strcmp( text_sections_names[i], "..text.end" ) == 0 )
{
text_offset = text_end_sym.st_value = (text_offset + text_alignment - 1) & -text_alignment;
add_global( "text_end", &text_end_sym, NULL );
DEBUG(( stderr, "text ends at %d\n", text_offset ));
continue;
}
// traverse all sections in all objects
p = root_obj;
while( p )
{
s = p->sections;
while( s )
{
if( strcmp( s->name, text_sections_names[i] ) == 0 )
{
// append section to text_sections list
DEBUG(( stderr, "adding text_section %s at section offset %d, size %d\n", s->name, text_offset, s->header->sh_size ));
s->ord_next = NULL;
s->offset = text_offset;
text_offset += s->header->sh_size;
text_offset = (text_offset + text_alignment - 1) & -text_alignment;
if( !text_sections )
{
text_sections = s;
}
else
{
last = text_sections;
while(last->ord_next) last = last->ord_next;
last->ord_next = s;
}
break;
}
s = s->next;
}
p = p->next;
}
}
DEBUG(( stderr, "arrange_sections: arranging data sections\n" ));
comp.text.size = comp.data.start = data_file_offset = text_offset;
// arrange data sections
for( unsigned int i = 0; i < countof(data_sections_names); i++ )
{
if( strcmp( data_sections_names[i], "..data.end" ) == 0 )
{
data_offset = data_end_sym.st_value = (data_offset + data_alignment - 1) & -data_alignment;
add_global( "data_end", &data_end_sym, NULL );
comp.data.size = data_offset;
comp.bss.start = comp.mt.start = comp.data.start + comp.data.size;
DEBUG(( stderr, "data ends at %d\n", data_offset ));
continue;
}
if( strcmp( data_sections_names[i], "..bss.end" ) == 0 )
{
data_offset = bss_end_sym.st_value = (data_offset + data_alignment - 1) & -data_alignment;
add_global( "bss_end", &bss_end_sym, NULL );
comp.bss.size = data_offset - comp.data.size;
comp.mt.size = 0;
DEBUG(( stderr, "bss ends at %d\n", data_offset ));
continue;
}
// traverse all sections in all objects
p = root_obj;
while( p )
{
s = p->sections;
while( s )
{
if( strcmp( s->name, data_sections_names[i] ) == 0 )
{
// append section to data_sections list
DEBUG(( stderr, "adding data_section %s at section offset %d, size %d\n", s->name, data_offset, s->header->sh_size ));
s->ord_next = NULL;
s->offset = data_offset;
data_offset += s->header->sh_size;
data_offset = (data_offset + data_alignment - 1) & -data_alignment;
if( !data_sections )
{
data_sections = s;
}
else
{
last = data_sections;
while(last->ord_next)last = last->ord_next;
last->ord_next = s;
}
break;
}
s = s->next;
}
p = p->next;
}
}
img_end_sym.st_value = text_offset + data_offset;
add_global( "img_end", &img_end_sym, NULL );
DEBUG(( stderr, "the whole image ends at %d\n", img_end_sym.st_value ));
DEBUG(( stderr, "arrange_sections: finished\n" ));
return 0;
}
/**
* begin a function
* called from "parse", this routine tries to make a function out
* of what follows
* modified version. p.l. woods
*/
newfunc() {
char n[NAMESIZE];
int idx, type;
fexitlab = getlabel();
if (!symname(n)) {
error("illegal function or declaration");
kill();
return;
}
if (idx = findglb(n)) {
if (symbol_table[idx].identity != FUNCTION)
multidef(n);
else if (symbol_table[idx].offset == FUNCTION)
multidef(n);
else
symbol_table[idx].offset = FUNCTION;
} else
add_global(n, FUNCTION, CINT, FUNCTION, PUBLIC);
if (!match("("))
error("missing open paren");
output_string(n);
output_label_terminator();
newline();
local_table_index = NUMBER_OF_GLOBALS; //locptr = STARTLOC;
argstk = 0;
// ANSI style argument declaration
if (doAnsiArguments() == 0) {
// K&R style argument declaration
while (!match(")")) {
if (symname(n)) {
if (findloc(n))
multidef(n);
else {
add_local(n, 0, 0, argstk, AUTO);
argstk = argstk + INTSIZE;
}
} else {
error("illegal argument name");
junk();
}
blanks();
if (!streq(line + lptr, ")")) {
if (!match(","))
error("expected comma");
}
if (endst())
break;
}
stkp = 0;
argtop = argstk;
while (argstk) {
if (type = get_type()) {
getarg(type);
need_semicolon();
} else {
error("wrong number args");
break;
}
}
}
statement(YES);
print_label(fexitlab);
output_label_terminator();
newline();
gen_modify_stack(0);
gen_ret();
stkp = 0;
local_table_index = NUMBER_OF_GLOBALS; //locptr = STARTLOC;
}
