#include <palacios/vmm_symbiotic.h>
#include <palacios/vm_guest.h>
+static struct hashtable * master_mod_table = NULL;
-int V3_init_symmod() {
- return -1;
+
+static uint_t mod_hash_fn(addr_t key) {
+ char * name = (char *)key;
+ return v3_hash_buffer((uchar_t *)name, strlen(name));
+}
+
+static int mod_eq_fn(addr_t key1, addr_t key2) {
+ char * name1 = (char *)key1;
+ char * name2 = (char *)key2;
+
+ return (strcmp(name1, name2) == 0);
}
-int v3_init_symmod_vm(struct v3_vm_info * info, v3_cfg_tree_t * cfg) {
+int V3_init_symmod() {
+ extern struct v3_sym_module __start__v3_modules[];
+ extern struct v3_sym_module __stop__v3_modules[];
+ struct v3_sym_module * tmp_mod = __start__v3_modules;
+ int i = 0;
+
+ master_mod_table = v3_create_htable(0, mod_hash_fn, mod_eq_fn);
+
+ while (tmp_mod != __stop__v3_modules) {
+ if (v3_htable_search(master_mod_table, (addr_t)(tmp_mod->name))) {
+ PrintError("Multiple instances of Module (%s)\n", tmp_mod->name);
+ return -1;
+ }
+ PrintDebug("Registering Symbiotic Module (%s)\n", tmp_mod->name);
+
+ if (v3_htable_insert(master_mod_table,
+ (addr_t)(tmp_mod->name),
+ (addr_t)(tmp_mod)) == 0) {
+ PrintError("Could not insert module %s to master list\n", tmp_mod->name);
+ return -1;
+ }
+ tmp_mod = &(__start__v3_modules[++i]);
+ }
+
return 0;
}
+/* ***************** */
+/* Linkage functions */
+/* ***************** */
-int v3_set_symmod_loader(struct v3_vm_info * vm, struct v3_symmod_loader_ops * ops, void * priv_data) {
+/* Data structure containing symbols exported via the symbiotic interface */
+struct v3_symbol_def32 {
+ uint32_t name_gva;
+ uint32_t value;
+} __attribute__((packed));
+
+struct v3_symbol {
+ char name[256];
+ uint64_t linkage;
+
+ struct list_head sym_node;
+};
+
+
+
+#include <palacios/vm_guest_mem.h>
+
+static int symbol_hcall_handler(struct guest_info * core, hcall_id_t hcall_id, void * priv_data) {
+ struct v3_symmod_state * symmod_state = &(core->vm_info->sym_vm_state.symmod_state);
+ addr_t sym_start_gva = core->vm_regs.rbx;
+ uint32_t sym_size = core->vm_regs.rcx;
+
+ int i = 0;
+
+ PrintError("Received SYMMOD symbol tables addr=%p, size=%d\n", (void *)sym_start_gva, sym_size);
+
+ for (i = 0; i < sym_size; i++) {
+ char * sym_name = NULL;
+ struct v3_symbol_def32 * tmp_symbol = NULL;
+ struct v3_symbol * new_symbol = NULL;
+ addr_t sym_gva = sym_start_gva + (sizeof(struct v3_symbol_def32) * i);
+
+
+ if (guest_va_to_host_va(core, sym_gva, (addr_t *)&(tmp_symbol)) == -1) {
+ PrintError("Could not locate symbiotic symbol definition\n");
+ continue;
+ }
+
+ if (guest_va_to_host_va(core, tmp_symbol->name_gva, (addr_t *)&(sym_name)) == -1) {
+ PrintError("Could not locate symbiotic symbol name\n");
+ continue;
+ }
+
+ PrintError("Symbiotic Symbol (%s) at %p\n", sym_name, (void *)(addr_t)tmp_symbol->value);
+
+ new_symbol = (struct v3_symbol *)V3_Malloc(sizeof(struct v3_symbol));
+
+ strncpy(new_symbol->name, sym_name, 256);
+ new_symbol->linkage = tmp_symbol->value;
+
+ list_add(&(new_symbol->sym_node), &(symmod_state->v3_sym_list));
+ }
+
+ return 0;
+}
+
+
+int v3_init_symmod_vm(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
+ struct v3_symspy_global_page * sym_page = v3_sym_get_symspy_vm(vm);
+
+ sym_page->symmod_enabled = 1;
+
+ v3_register_hypercall(vm, SYMMOD_SYMS_HCALL, symbol_hcall_handler, NULL);
+
+ INIT_LIST_HEAD(&(symmod_state->v3_sym_list));
+
+ V3_Print("Symmod initialized\n");
+
+ return 0;
+}
+
+int v3_set_symmod_loader(struct v3_vm_info * vm, struct v3_symmod_loader_ops * ops, void * priv_data) {
+ struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
+
symmod_state->loader_ops = ops;
symmod_state->loader_data = priv_data;
-
+
return 0;
}
-static char test_module_data[16] = {"hello"};
-static struct v3_sym_module test_module = {
- .name = "test",
- .num_bytes = 16,
- .data = test_module_data,
-};
int v3_load_sym_module(struct v3_vm_info * vm, char * mod_name) {
struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
+ struct v3_sym_module * mod = (struct v3_sym_module *)v3_htable_search(master_mod_table, (addr_t)mod_name);
+
+ if (!mod) {
+ PrintError("Could not find module %s\n", mod_name);
+ return -1;
+ }
PrintDebug("Loading Module (%s)\n", mod_name);
- return symmod_state->loader_ops->load_module(vm, mod_name, 16, symmod_state->loader_data);
+ return symmod_state->loader_ops->load_module(vm, mod, symmod_state->loader_data);
}
+
+
+
struct v3_sym_module * v3_get_sym_module(struct v3_vm_info * vm, char * name) {
- return &test_module;
+ struct v3_sym_module * mod = (struct v3_sym_module *)v3_htable_search(master_mod_table, (addr_t)name);
+
+ if (!mod) {
+ PrintError("Could not find module %s\n", name);
+ return NULL;
+ }
+
+ return mod;
}
