#include <palacios/vm_guest_mem.h>
#include <palacios/vmm_decoder.h>
-#ifndef CONFIG_DEBUG_IO
+#ifndef V3_CONFIG_DEBUG_IO
#undef PrintDebug
#define PrintDebug(fmt, args...)
#endif
/* 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;
}
int v3_init_vmx_io_map(struct v3_vm_info * vm) {
+ void *temp;
+
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);
+
+ temp = V3_AllocPages(2); // need not be shadow-safe, not exposed to guest
+ if (!temp) {
+ PrintError(vm, VCORE_NONE, "Cannot allocate io bitmap\n");
+ return -1;
+ }
+
+ vm->io_map.arch_data = V3_VAddr(temp);
+ 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);
+ PrintDebug(core->vm_info, core, "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(core->vm_info, core, "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(core->vm_info, core, "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);
+ PrintDebug(core->vm_info, core, "INS on port 0x%x\n", io_qual.port);
read_size = io_qual.access_size + 1;
} else if(instr_info.addr_size == 2) {
rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
} else {
- PrintDebug("Unknown INS address size!\n");
+ PrintDebug(core->vm_info, core, "Unknown INS address size!\n");
return -1;
}
}
rdi_change = read_size;
}
- PrintDebug("INS size=%d for %ld steps\n", read_size, rep_num);
+ PrintDebug(core->vm_info, core, "INS size=%d for %u steps\n", read_size, rep_num);
if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
- PrintError("Could not convert Guest VA to host VA\n");
+ PrintError(core->vm_info, core, "Could not convert Guest VA to host VA\n");
return -1;
}
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(core->vm_info, core, "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(core->vm_info, core, "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);
+ PrintDebug(core->vm_info, core, "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(core->vm_info, core, "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(core->vm_info, core, "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);
+ PrintDebug(core->vm_info, core, "OUTS on port 0x%x\n", io_qual.port);
write_size = io_qual.access_size + 1;
} else if(instr_info.addr_size == 2) {
rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
} else {
- PrintDebug("Unknown INS address size!\n");
+ PrintDebug(core->vm_info, core, "Unknown INS address size!\n");
return -1;
}
}
- PrintDebug("OUTS size=%d for %ld steps\n", write_size, rep_num);
+ PrintDebug(core->vm_info, core, "OUTS size=%d for %u steps\n", write_size, rep_num);
if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
- PrintError("Could not convert guest VA to host VA\n");
+ PrintError(core->vm_info, core, "Could not convert guest VA to host VA\n");
return -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(core->vm_info, core, "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(core->vm_info, core, "Read failure for INS on port 0x%x\n", io_qual.port);
+ return -1;
+ }
+ }
+
host_addr += rsi_change;
core->vm_regs.rsi += rsi_change;