Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


symbiotic updates for module loading
[palacios.git] / palacios / src / palacios / vmm_symmod.c
1 /* 
2  * This file is part of the Palacios Virtual Machine Monitor developed
3  * by the V3VEE Project with funding from the United States National 
4  * Science Foundation and the Department of Energy.  
5  *
6  * The V3VEE Project is a joint project between Northwestern University
7  * and the University of New Mexico.  You can find out more at 
8  * http://www.v3vee.org
9  *
10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
15  *
16  * This is free software.  You are permitted to use,
17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
18  */
19 #include <palacios/vmm.h>
20 #include <palacios/vmm_symmod.h>
21 #include <palacios/vmm_symbiotic.h>
22 #include <palacios/vm_guest.h>
23
24 static struct hashtable * master_mod_table = NULL;
25
26
27
28 static uint_t mod_hash_fn(addr_t key) {
29     char * name = (char *)key;
30     return v3_hash_buffer((uchar_t *)name, strlen(name));
31 }
32
33 static int mod_eq_fn(addr_t key1, addr_t key2) {
34     char * name1 = (char *)key1;
35     char * name2 = (char *)key2;
36     
37     return (strcmp(name1, name2) == 0);
38 }
39
40
41
42 int V3_init_symmod() {
43     extern struct v3_sym_module __start__v3_modules[];
44     extern struct v3_sym_module __stop__v3_modules[];
45     struct v3_sym_module * tmp_mod = __start__v3_modules;
46     int i = 0;
47
48     master_mod_table = v3_create_htable(0, mod_hash_fn, mod_eq_fn);
49
50     while (tmp_mod != __stop__v3_modules) {
51         if (v3_htable_search(master_mod_table, (addr_t)(tmp_mod->name))) {
52             PrintError("Multiple instances of Module (%s)\n", tmp_mod->name);
53             return -1;
54         }       
55         PrintDebug("Registering Symbiotic Module (%s)\n", tmp_mod->name);
56
57         if (v3_htable_insert(master_mod_table, 
58                              (addr_t)(tmp_mod->name),
59                              (addr_t)(tmp_mod)) == 0) {
60             PrintError("Could not insert module %s to master list\n", tmp_mod->name);
61             return -1;
62         }
63         tmp_mod = &(__start__v3_modules[++i]);
64     }
65     
66     return 0;
67 }
68
69 /* ***************** */
70 /* Linkage functions */
71 /* ***************** */
72
73
74 /* Data structure containing symbols exported via the symbiotic interface */
75 struct v3_symbol_def32 {
76     uint32_t name_gva;
77     uint32_t value;
78 } __attribute__((packed));
79
80 struct v3_symbol {
81     char name[256];
82     uint64_t linkage;
83
84     struct list_head sym_node;
85 };
86
87
88
89 #include <palacios/vm_guest_mem.h>
90
91 static int symbol_hcall_handler(struct guest_info * core, hcall_id_t hcall_id, void * priv_data) {
92     struct v3_symmod_state * symmod_state = &(core->vm_info->sym_vm_state.symmod_state);
93     addr_t sym_start_gva = core->vm_regs.rbx;
94     uint32_t sym_size = core->vm_regs.rcx;
95
96     int i = 0;
97
98     PrintError("Received SYMMOD symbol tables addr=%p, size=%d\n", (void *)sym_start_gva, sym_size);
99
100     for (i = 0; i < sym_size; i++) {
101         char * sym_name = NULL;
102         struct v3_symbol_def32 * tmp_symbol = NULL;
103         struct v3_symbol * new_symbol = NULL;
104         addr_t sym_gva = sym_start_gva + (sizeof(struct v3_symbol_def32) * i);
105
106
107         if (guest_va_to_host_va(core, sym_gva, (addr_t *)&(tmp_symbol)) == -1) {
108             PrintError("Could not locate symbiotic symbol definition\n");
109             continue;
110         }
111         
112         if (guest_va_to_host_va(core, tmp_symbol->name_gva, (addr_t *)&(sym_name)) == -1) {
113             PrintError("Could not locate symbiotic symbol name\n");
114             continue;
115         }
116         
117         PrintError("Symbiotic Symbol (%s) at %p\n", sym_name, (void *)(addr_t)tmp_symbol->value);
118         
119         new_symbol = (struct v3_symbol *)V3_Malloc(sizeof(struct v3_symbol));
120
121         strncpy(new_symbol->name, sym_name, 256);
122         new_symbol->linkage = tmp_symbol->value;
123
124         list_add(&(new_symbol->sym_node), &(symmod_state->v3_sym_list));
125     }
126
127     return 0;
128 }
129
130
131 int v3_init_symmod_vm(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
132     struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
133     struct v3_symspy_global_page * sym_page = v3_sym_get_symspy_vm(vm);
134
135     sym_page->symmod_enabled = 1;
136
137     v3_register_hypercall(vm, SYMMOD_SYMS_HCALL, symbol_hcall_handler, NULL);
138
139     INIT_LIST_HEAD(&(symmod_state->v3_sym_list));
140
141     V3_Print("Symmod initialized\n");
142
143     return 0;
144 }
145
146
147
148 int v3_set_symmod_loader(struct v3_vm_info * vm, struct v3_symmod_loader_ops * ops, void * priv_data) {
149     struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
150    
151     symmod_state->loader_ops = ops;
152     symmod_state->loader_data = priv_data;
153  
154     return 0;
155 }
156
157
158
159
160
161 int v3_load_sym_module(struct v3_vm_info * vm, char * mod_name) {
162     struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
163     struct v3_sym_module * mod = (struct v3_sym_module *)v3_htable_search(master_mod_table, (addr_t)mod_name);
164
165     if (!mod) {
166         PrintError("Could not find module %s\n", mod_name);
167         return -1;
168     }
169
170     PrintDebug("Loading Module (%s)\n", mod_name);
171
172     return symmod_state->loader_ops->load_module(vm, mod, symmod_state->loader_data);
173 }
174
175
176
177
178 struct v3_sym_module * v3_get_sym_module(struct v3_vm_info * vm, char * name) {
179     struct v3_sym_module * mod = (struct v3_sym_module *)v3_htable_search(master_mod_table, (addr_t)name);
180
181     if (!mod) {
182         PrintError("Could not find module %s\n", name);
183         return NULL;
184     }
185
186     return mod;
187 }