/* Same as SVM */
static int update_map(struct v3_vm_info * vm, uint16_t port, int hook_read, int hook_write) {
- uchar_t * bitmap = (uint8_t *)(vm->io_map.arch_data);
+ uint8_t * bitmap = (uint8_t *)(vm->io_map.arch_data);
int major = port / 8;
int minor = port % 8;
vm->io_map.update_map = update_map;
vm->io_map.arch_data = V3_VAddr(V3_AllocPages(2));
- memset(vm->io_map.arch_data, 0, PAGE_SIZE_4KB * 2);
+ memset(vm->io_map.arch_data, 0xff, PAGE_SIZE_4KB * 2);
v3_refresh_io_map(vm);
struct v3_io_hook * hook = NULL;
int read_size = 0;
-
hook = v3_get_io_hook(core->vm_info, io_qual.port);
- if (hook == NULL) {
- PrintError("Hook not present for IN on port %x\n", io_qual.port);
- return -1;
- }
-
read_size = io_qual.access_size + 1;
PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_qual.port, io_qual.port);
- if (hook->read(core, io_qual.port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) {
- PrintError("Read failure for IN on port %x\n", io_qual.port);
- return -1;
- }
+ if (hook == NULL) {
+ PrintDebug("IN operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
+ core->vm_regs.rax >>= 8*read_size;
+ core->vm_regs.rax <<= 8*read_size;
+ } else {
+ if (hook->read(core, io_qual.port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) {
+ PrintError("Read failure for IN on port %x\n", io_qual.port);
+ return -1;
+ }
+ }
+
core->rip += exit_info->instr_len;
addr_t guest_va = exit_info->guest_linear_addr;
addr_t host_addr = 0;
int rdi_change = 0;
- ulong_t rep_num = 1;
+ uint32_t rep_num = 1;
struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
hook = v3_get_io_hook(core->vm_info, io_qual.port);
- if (hook == NULL) {
- PrintError("Hook not present for INS on port 0x%x\n", io_qual.port);
- return -1;
- }
PrintDebug("INS on port 0x%x\n", io_qual.port);
}
do {
- if (hook->read(core, io_qual.port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
- PrintError("Read Failure for INS on port 0x%x\n", io_qual.port);
- return -1;
- }
+
+ if (hook == NULL) {
+ PrintDebug("INS operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
+
+ memset((char*)host_addr,0,read_size);
+
+ } else {
+ if (hook->read(core, io_qual.port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
+ PrintError("Read Failure for INS on port 0x%x\n", io_qual.port);
+ return -1;
+ }
+ }
+
host_addr += rdi_change;
core->vm_regs.rdi += rdi_change;
hook = v3_get_io_hook(core->vm_info, io_qual.port);
- if (hook == NULL) {
- PrintError("Hook not present for out on port %x\n", io_qual.port);
- return -1;
- }
write_size = io_qual.access_size + 1;
PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_qual.port, io_qual.port);
- if (hook->write(core, io_qual.port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) {
- PrintError("Write failure for out on port %x\n",io_qual.port);
- return -1;
+ if (hook == NULL) {
+ PrintDebug("OUT operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
+ } else {
+ if (hook->write(core, io_qual.port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) {
+ PrintError("Write failure for out on port %x\n",io_qual.port);
+ return -1;
+ }
}
-
-
core->rip += exit_info->instr_len;
return 0;
addr_t guest_va = exit_info->guest_linear_addr;
addr_t host_addr;
int rsi_change;
- ulong_t rep_num = 1;
+ uint32_t rep_num = 1;
struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
hook = v3_get_io_hook(core->vm_info, io_qual.port);
- if (hook == NULL) {
- PrintError("Hook not present for OUTS on port 0x%x\n", io_qual.port);
- return -1;
- }
-
PrintDebug("OUTS on port 0x%x\n", io_qual.port);
write_size = io_qual.access_size + 1;
}
do {
- if (hook->write(core, io_qual.port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
- PrintError("Read failure for INS on port 0x%x\n", io_qual.port);
- return -1;
- }
+
+ if (hook == NULL) {
+ PrintDebug("OUTS operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
+ } else {
+ if (hook->write(core, io_qual.port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
+ PrintError("Read failure for INS on port 0x%x\n", io_qual.port);
+ return -1;
+ }
+ }
+
host_addr += rsi_change;
core->vm_regs.rsi += rsi_change;