static unsigned int protocol_child(struct service_backend *backend, struct service_state *state, unsigned int id, char *path, unsigned int length)
{
struct system_node *node = (struct system_node *)backend->map(state, id, sizeof (struct system_node));
struct list_item *current;
struct system_node *n = node;
spinlock_acquire(&node->children.spinlock);
for (current = node->children.head; current; current = current->next)
{
struct system_node *n2 = current->data;
unsigned int length0 = ascii_length(n2->name);
if (n2->type == SYSTEM_NODETYPE_MULTIGROUP)
{
unsigned int colon = memory_findbyte(path, length, ':');
unsigned int val;
if (length0 != colon)
continue;
if (!memory_match(n2->name, path, colon))
continue;
val = ascii_rvalue(path + colon + 1, length - colon - 1, 10);
if (val != n2->index)
continue;
}
else
{
if (length0 != length)
continue;
if (!memory_match(n2->name, path, length))
continue;
}
n = n2;
break;
}
spinlock_release(&node->children.spinlock);
return (unsigned int)n;
}
static unsigned int child(struct service_backend *backend, struct service_state *state, struct cpio_header *header, unsigned int id, char *path, unsigned int length)
{
struct cpio_header *eheader;
unsigned int current = 0;
do
{
char *name;
eheader = mapheader(backend, state, current);
if (!eheader)
break;
if (eheader->namesize != header->namesize + length + 1)
continue;
name = mapname(backend, state, eheader, current);
if (!name)
break;
if (memory_match(name + header->namesize, path, length))
return current;
} while ((current = cpio_next(eheader, current)));
return id;
}
static unsigned int findvalue(unsigned int id, struct elf_header *header, struct elf_sectionheader *symbolheader, char *strings, unsigned int count, char *symbolname)
{
unsigned int i;
for (i = 0; i < symbolheader->size / symbolheader->esize; i++)
{
struct elf_symbol symbol;
if (!file_seekreadall(id, &symbol, symbolheader->esize, symbolheader->offset + i * symbolheader->esize))
return 0;
if (strings[symbol.name + count] != '\0' || !memory_match(symbolname, &strings[symbol.name], count))
continue;
if (header->type == ELF_TYPE_RELOCATABLE)
{
struct elf_sectionheader referenceheader;
if (!readsectionheader(id, header, symbol.shindex, &referenceheader))
return 0;
return referenceheader.address + referenceheader.offset + symbol.value;
}
return symbol.value;
}
return 0;
}
static unsigned int protocol_match(struct service_backend *backend, struct service_state *state)
{
struct system_header *header = (struct system_header *)backend->map(state, 0, sizeof (struct system_header));
return (header) ? memory_match(header->id, "FUDGE_SYSTEM", 12) : 0;
}
unsigned int elf_validate(struct elf_header *header)
{
unsigned char id[] = {ELF_IDENTITY_MAGIC0, ELF_IDENTITY_MAGIC1, ELF_IDENTITY_MAGIC2, ELF_IDENTITY_MAGIC3};
return memory_match(header->identify, id, 4);
}
static unsigned int protocol_child(struct service_backend *backend, struct service_state *state, char *path, unsigned int length)
{
struct cpio_header header;
struct cpio_header eheader;
unsigned char name[1024];
unsigned int id = 0;
if (!length)
return 1;
if (!readheader(backend, &header, state->id))
return 0;
if (!readname(backend, &header, state->id, name, 1024))
return 0;
if (path[length - 1] == '/')
length--;
do
{
unsigned char cname[1024];
if (id == state->id)
break;
if (!readheader(backend, &eheader, id))
break;
if (eheader.namesize - header.namesize != length + 1)
continue;
if (!readname(backend, &eheader, id, cname, 1024))
break;
if (memory_match(cname + header.namesize, path, length))
{
state->id = id;
return 1;
}
} while ((id = cpio_next(&eheader, id)));
return 0;
}
