/* process group descriptors */
static int process_group_desc(
struct bio *bio,
struct xen_vbd *vbd,
struct label *label
) {
struct ext3_group_desc *desc;
struct ljx_ext3_superblock *lsb = vbd->superblock;
struct label *tlabel;
unsigned int num_groups;
int i, ret;
void *buf;
num_groups = label->nr_sec * SECTOR_SIZE / sizeof(struct ext3_group_desc);
num_groups = lsb->groups_count;
buf = kzalloc(num_groups * sizeof(struct ext3_group_desc), GFP_KERNEL);
if ((ret = copy_block(bio, buf, 0, num_groups * sizeof(struct ext3_group_desc))))
return ret;
JPRINTK("scanning %u groups", num_groups);
for (i = 0; i < num_groups; i++) {
desc = (struct ext3_group_desc *) (buf + i * sizeof(struct ext3_group_desc));
tlabel = insert_label(
&vbd->label_list,
le32_to_cpu(desc->bg_inode_table) * lsb->block_size,
lsb->inodes_per_group * lsb->inode_size / SECTOR_SIZE,
INODE_BLOCK);
tlabel->processor = &process_inode_block;
JPRINTK("group %u desc:", i);
JPRINTK("\tblock_bitmap: %u, inode_bitmap: %u, used_dirs: %u",
le32_to_cpu(desc->bg_block_bitmap),
(unsigned int) le32_to_cpu(desc->bg_inode_bitmap),
(unsigned int) le32_to_cpu(desc->bg_used_dirs_count));
}
kfree(buf);
return 0;
}
static object *insert_ltable(char *column, char *limit, line_item *v, int type)
{
short global = masm_level;
char *s;
object *o = NULL;
paragraph *p, *q;
line_item vnew;
value *vlbase;
int x, size;
int base_displacement = 0;
#ifdef STRUCTURE_DEPTH
object *adhesionp
= (active_x) ? active_instance[active_x - 1]
: NULL;
int adhesion_level = -1;
int b4 = type;
#endif
if (type == UNDEFINED) global = 0;
else
{
load_name(column, limit);
if (label_highest_byte == 0) return NULL;
#ifdef SYNONYMS
if (*label_margin == '(') load_qualifier(label_margin, limit);
#endif
s = label_margin;
while (*s++ == '*') global--;
}
#ifdef STRUCTURE_DEPTH
if ((adhesionp) && (global == adhesionp->l.passflag)
&& (type) && (type ^ SET) && (type ^ BLANK))
{
o = findlabel_in_node();
adhesion_level = adhesionp->l.r.l.xref;
if (adhesion_level < 0) adhesion_level = 0;
global = adhesion_level;
if (uselector['B'-'A'])
printf("[L%x:A%x:G%x:V%x:P%X]%s:%s\n",
masm_level, adhesion_level, global, type,
adhesionp->l.passflag,
adhesionp->l.name, name);
}
else
{
if (global > 0)
{
o = retrieve_dynamic_label();
if (o)
{
if (o->l.r.l.xref ^ global) o = NULL;
}
}
else
{
#ifdef HASH
o = hash_locate(0);
#else
o = retrieve_label();
#endif
}
}
#else
if (global > 0)
{
o = retrieve_dynamic_label();
if (o)
{
if (o->l.r.l.xref ^ global) o = NULL;
}
}
else
{
#ifdef HASH
o = hash_locate(0);
#else
o = retrieve_label();
#endif
}
#endif
if ((type == LOCATION) || (type == BLANK))
{
if (x = actual->flags & 129)
{
vnew = *v;
v = &vnew;
if (x & 128)
{
if (type == LOCATION) type = EQUF;
v->b[RADIX/8-5] = actual->rbase;
base_displacement = 1;
}
if (x == 1)
{
vlbase = (value *) actual->runbank;
operand_add(v, &vlbase->value);
}
}
}
if (o)
{
if (type == BLANK) return o;
x = o->l.valued;
if (x == BLANK)
{
o->l.valued = type;
o->l.value = *v;
return o;
}
/*************************************
$blank does not alter any label
which already exists
*************************************/
#ifdef RECORD
if (type == RECORD)
{
if ((branch_record == 0) && (record_nest == 0)) base_displacement = 1;
type = EQUF;
if (actual->flags & 128)
{
vnew = *v;
v = &vnew;
v->b[RADIX/8-5] = actual->rbase;
}
}
#endif
if (x)
{
if (type ^ x)
{
if ((pass) && ((type == LOCATION) || (base_displacement)))
{
if ((x == EQU) || (x == SET) || (x == EQUF))
return o;
}
flagp(o->l.name, "may not be retyped");
return o;
}
}
if (type == FORM) return o;
if (type == SET)
{
}
else
{
if (background_pass)
{
if (type == LOCATION) checkwave(v, o, actual->flags);
else if (base_displacement) checkwaveb(v, o);
}
else
{
#ifdef BINARY
if (o->l.valued == UNDEFINED) o->l.valued = type;
else
#endif
{
flagp1p(o->l.name, "may not be restated");
return o;
}
}
}
}
else
{
#ifdef EQUAZE
if ((type == EQU) || (type == SET)) type = BLANK;
#endif
size = sizeof(label) + label_length - PARAGRAPH;
if (global > 0)
{
flotsam -= size;
if (flotsam < 0)
{
flag_either_pass("too many dynamic labels", "abandon");
exit(0);
}
o = floatop;
floatop = (object *) ((char *) floatop + size);
o->l.along = NULL;
floatop->i = 0;
}
else
{
o = lr;
if (remainder < size) o = buy_ltable();
remainder -= size;
lr = (object *) ((char *) lr + size);
}
lr->i = 0;
p = (paragraph *) o->l.name;
q = (paragraph *) name;
x = label_length >> 2;
while (x--) *p++ = *q++;
o->l.r.i = 0;
o->l.r.l.xref = global;
#ifdef HASH
o->l.hashlink = NULL;
#endif
#ifdef BINARY
o->l.link = NULL;
#endif
o->l.down = NULL;
o->l.along = NULL;
o->h.type = LABEL;
o->h.length = size;
o->l.passflag = 0;
o->l.valued = type;
if (type == SET) o->l.value = zero_o;
if (global > 0)
{
}
else
{
#ifdef STRUCTURE_DEPTH
if ((active_x) && (global == adhesion_level)
&& (b4) && (b4 ^ SET) && (b4 ^ BLANK)) inslabel(o);
else
#endif
{
#ifdef HASH
hash_in(o);
#endif
if ((list) || (o->l.valued == UNDEFINED))
{
insert_label(o);
}
}
}
}
if (type == SET)
{
}
else o->l.value = *v;
o->l.passflag = masm_level;
if ((uselector['L'-'A']) && (masm_level))
{
printf("[%x<-%x:%x:%s:%d:%s]\n", masm_level, global, type,
file_label[depth]->l.name, ll[depth], o->l.name);
}
if ((type == LOCATION) || (type == BLANK))
{
o->l.r.l.rel = counter_of_reference | 128;
if (actual->relocatable) o->l.r.l.y |= 1;
else o->l.r.l.y &= 254;
}
if (base_displacement) o->l.r.l.rel = counter_of_reference | 128;
return o;
}
/**
* Based on fs/ext3/super.c:1630. Can't use bread, however.
*/
extern int ljx_ext3_fill_super(
struct xen_vbd *vbd,
struct ext3_super_block *sb,
int silent
) {
struct ljx_ext3_superblock *lsb;
struct ljx_ext3_superblock **pp_lsb;
struct label *label;
unsigned int blocksize, db_count, i, block, groups_left;
lsb = kzalloc(sizeof(struct ljx_ext3_superblock), GFP_KERNEL);
if (! lsb)
return -ENOMEM;
pp_lsb = &vbd->superblock;
*pp_lsb = lsb;
/* compute blocksize
minsize = bdev_logical_block_size(vbd->bdev);
size = EXT3_MIN_BLOCK_SIZE;
if (size < minsize)
size = minsize;
*/
blocksize = vbd->bdev->bd_block_size;
lsb->inodes_count = le32_to_cpu(sb->s_inodes_count);
lsb->blocks_count = le32_to_cpu(sb->s_blocks_count);
lsb->inode_size = le32_to_cpu(sb->s_inode_size);
lsb->first_data_block = le32_to_cpu(sb->s_first_data_block);
lsb->log_block_size = le32_to_cpu(sb->s_log_block_size);
lsb->log_frag_size = le32_to_cpu(sb->s_log_frag_size);
lsb->blocks_per_group = le32_to_cpu(sb->s_blocks_per_group);
lsb->frags_per_group = le32_to_cpu(sb->s_frags_per_group);
lsb->inodes_per_group = le32_to_cpu(sb->s_inodes_per_group);
lsb->first_inode = le32_to_cpu(sb->s_first_ino);
lsb->journal_inum = le32_to_cpu(sb->s_journal_inum);
lsb->inodes_per_block = blocksize / le32_to_cpu(sb->s_inode_size);
lsb->desc_per_block = blocksize / sizeof(struct ext3_group_desc);
lsb->groups_count = ((le32_to_cpu(sb->s_blocks_count) -
le32_to_cpu(sb->s_first_data_block) - 1)
/ lsb->blocks_per_group) + 1;
lsb->first_meta_bg = le32_to_cpu(sb->s_first_meta_bg);
lsb->feature_incompat = le32_to_cpu(sb->s_feature_incompat);
lsb->feature_ro_compat = le32_to_cpu(sb->s_feature_ro_compat);
lsb->block_size = EXT3_MIN_BLOCK_SIZE << lsb->log_block_size;
db_count = DIV_ROUND_UP(lsb->groups_count, lsb->desc_per_block);
lsb->group_desc = kzalloc(db_count * sizeof(struct ljx_ext3_group_desc *),
GFP_KERNEL);
if (lsb->group_desc == NULL)
return -ENOMEM;
lsb->group_desc = kzalloc(db_count * sizeof(*lsb->group_desc), GFP_KERNEL);
groups_left = lsb->groups_count;
for (i = 0; i < db_count; i++) {
block = descriptor_loc(lsb, i);
lsb->group_desc[i].init = false;
lsb->group_desc[i].location = block;
JPRINTK("group desc at %u", block);
label = insert_label(
&vbd->label_list,
block,
8,
GROUP_DESC
);
label->processor = &process_group_desc;
}
JPRINTK("Total number of groups: %u", lsb->groups_count);
print_label_list(&vbd->label_list);
return 0;
}
void read_file(char *filename,struct Process **pproc)
{
FILE *fp;
char *endfile,line[MAXSTR],*p,save_token[MAXSTR];
int label_bool=0,line_count=0,num_code=0,n_args;
struct instruction_node *new_instr;
struct Process *proc;
struct expr_node *new_expr;
proc=(struct Process*)malloc(sizeof(struct Process));
if(proc==NULL) die("errore nell'allocare struct Process");
proc->pt=NULL;
proc->pc=NULL;
proc->prev=NULL;
proc->next=NULL;
proc->processID=get_processID();
fp=fopen(filename,"r");
if(fp==NULL) die("error opening file");
proc->pc=(struct process_construct*)malloc(sizeof(struct process_construct));
if(proc->pc==NULL) die("errore nell'allocare process_construct");
proc->pc->first=NULL;
proc->pc->last=NULL;
proc->pc->len=0;
proc->pc->org[0]='\0';
proc->pc->vt_first=NULL;
proc->pc->vt_last=NULL;
while((endfile=fgets(line,MAXSTR,fp))!=NULL)
{
line_count++;
p=&line[0];
if(*p==';') continue;
p=skip_space(p);
if(*p=='\n') continue;
p=get_token(p);
p=skip_space(p);
if((strcmp(my_token,"org"))==0)
{
p=get_word(p);strncpy(proc->pc->org,my_token,MAXSTR);
if(*p!='\n') {sprintf(save_token,"parse error at line %d. not an end line after the org argument",line_count);die(save_token);}
continue;
}
if((strcmp(my_token,"end"))==0)
{
p=skip_space(p);
if(*p!='\n') {sprintf(save_token,"parse error after 'end' at line %d.",line_count);die(save_token);}
break;
}
if((strcmp(my_token,"assert"))==0)
{
take_assert(p);
new_expr=(struct expr_node*)malloc(sizeof(struct expr_node));
if(new_expr==NULL)
{printf("at line %d, ",line_count);die("error allocating new_expr");}
p=skip_space(p);
p=get_b_arg(&new_expr,p,line_count);
insert_in_vt(ASSERT_STR,new_expr,line_count,proc);
continue;
}
if(*p==':')
{
insert_label(my_token,num_code,line_count,proc);p=skip_space(++p);
if(*p=='\n') continue;
p=get_token(p);
}
n_args=is_instr(my_token,line_count);
if(n_args!=-1)
{
new_instr=(struct instruction_node*)malloc(sizeof(struct instruction_node));
if(new_instr==NULL) {printf("at line %d , ",line_count);die("error allocating new_instr");}
strncpy(new_instr->instr,my_token,MAXSTR);
new_instr->num_node=num_code++;
new_instr->line_count=line_count;
new_instr->prev=NULL;
new_instr->next=NULL;
new_instr->code=NULL;
new_instr->left=NULL;
new_instr->right=NULL;
new_instr->laddr[0]='#';new_instr->laddr[1]='\0';
new_instr->raddr[0]='#';new_instr->raddr[1]='\0';
strcpy(new_instr->modifier,"NULL");
if(*p=='.'){
p=get_word(++p);is_modifier(my_token,line_count);
strncpy(new_instr->modifier,my_token,MAXMOD);
}
p=skip_space(p);
if(n_args>0)
{
p=get_addr_mode(p); //$ by default. the result is in my_token
new_instr->laddr[0]=my_token[0];
new_instr->laddr[1]='\0';
//p=get_token(p);
//new_instr->left=(struct expr_node*)malloc(sizeof(struct expr_node));
//if(new_instr->left==NULL){
//printf("at line %d , ",line_count);die("error alocating left expr");}
p=get_arg(&new_instr->left,p,line_count);
p=skip_space(p);
if(n_args>1)
{
if(*p!=',')
{printf("at line %d , ",line_count);die("a comma expected (,)");}
p=skip_space(++p);
p=get_addr_mode(p); //$ by default. the result is in my_token
new_instr->raddr[0]=my_token[0];
new_instr->raddr[1]='\0';
//p=get_token(p);
//new_instr->right=(struct expr_node*)malloc(sizeof(struct expr_node));
//if(new_instr->right==NULL){
//printf("at line %d , ",line_count);die("error allocating right expr");}
p=get_arg(&new_instr->right,p,line_count);
p=skip_space(p);
}
}
if(*p!='\n')
{printf("at line %d , ",line_count);die("not an ending line after command");}
//add the node
add_node(new_instr,proc);
continue;
}
strncpy(save_token,my_token,MAXSTR);
p=get_token(p);
if((strcmp(my_token,"equ"))==0)
{
new_expr=(struct expr_node*)malloc(sizeof(struct expr_node));
if(new_expr==NULL)
{printf("at line %d, ",line_count);die("error allocating new_expr");}
p=skip_space(p);
p=get_arg(&new_expr,p,line_count);
insert_in_vt(save_token,new_expr,line_count,proc);
continue;
}
}
fclose(fp);
proc->pc->len=num_code;
add_proc(proc);
*pproc=proc;
}