added single step emulator files

diff --git a/palacios/include/palacios/vmm_ss_emulator.h b/palacios/include/palacios/vmm_ss_emulator.h
new file mode 100644 (file)
index 0000000..173cddd
--- /dev/null
+++ b/palacios/include/palacios/vmm_ss_emulator.h
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National 
+ * Science Foundation and the Department of Energy.  
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico.  You can find out more at 
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#ifndef __VMM_EMULATOR_H__
+#define __VMM_EMULATOR_H__
+
+#ifdef __V3VEE__
+
+#include <palacios/vmm_list.h>
+#include <palacios/vmm_shadow_paging.h>
+#include <palacios/vmm_paging.h>
+
+
+
+
+
+
+
+
+struct emulation_state {
+
+    uint_t running : 1;
+    uint_t instr_length;
+
+    uint_t tf_enabled : 1;
+};
+
+
+int v3_init_emulator(struct guest_info * info);
+
+
+int v3_emulation_exit_handler(struct guest_info * info);
+
+int v3_emulate_memory_write(struct guest_info * info, addr_t fault_gva,
+                           int (*write)(addr_t write_addr, void * src, uint_t length, void * priv_data), 
+                           addr_t write_addr, void * private_data);
+int v3_emulate_memory_read(struct guest_info * info, addr_t fault_gva, 
+                          int (*read)(addr_t read_addr, void * dst, uint_t length, void * priv_data), 
+                          addr_t read_addr, void * private_data);
+
+
+#endif // !__V3VEE__
+
+#endif

diff --git a/palacios/src/palacios/vmm_ss_emulator.c b/palacios/src/palacios/vmm_ss_emulator.c
new file mode 100644 (file)
index 0000000..329ee0f
--- /dev/null
+++ b/palacios/src/palacios/vmm_ss_emulator.c
@@ -0,0 +1,186 @@
+/* 
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National 
+ * Science Foundation and the Department of Energy.  
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico.  You can find out more at 
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_emulator.h>
+#include <palacios/vm_guest_mem.h>
+#include <palacios/vmm_decoder.h>
+#include <palacios/vmm_debug.h>
+#include <palacios/vmcb.h>
+#include <palacios/vmm_ctrl_regs.h>
+
+
+#ifndef DEBUG_EMULATOR
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
+int v3_init_emulator(struct guest_info * info) {
+
+
+    emulator->tf_enabled = 0;
+
+    return 0;
+}
+
+
+
+
+
+
+
+
+
+
+static int set_stepping(struct guest_info * info) {
+    vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
+    ctrl_area->exceptions.db = 1;
+
+    info->emulator.tf_enabled = ((struct rflags *)&(info->ctrl_regs.rflags))->tf;
+
+    ((struct rflags *)&(info->ctrl_regs.rflags))->tf = 1;
+
+    return 0;
+}
+
+
+static int unset_stepping(struct guest_info * info) {
+    vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
+    ctrl_area->exceptions.db = 0;
+
+    ((struct rflags *)&(info->ctrl_regs.rflags))->tf = info->emulator.tf_enabled;
+
+    if (info->emulator.tf_enabled) {
+       // Inject breakpoint exception into guest
+    }
+
+    return 0;
+
+}
+
+
+int v3_emulate_memory_read(struct guest_info * info, addr_t read_gva, 
+                          int (*read)(addr_t read_addr, void * dst, uint_t length, void * priv_data), 
+                          addr_t read_gpa, void * private_data) {
+    struct basic_instr_info instr_info;
+    uchar_t instr[15];
+    int ret;
+    addr_t data_addr_offset = PAGE_OFFSET(read_gva);
+ 
+    PrintDebug("Emulating Read\n");
+
+    if (info->mem_mode == PHYSICAL_MEM) { 
+       ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+    } else { 
+       ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+    }
+
+    if (ret == -1) {
+       PrintError("Could not read guest memory\n");
+       return -1;
+    }
+
+#ifdef DEBUG_EMULATOR
+    PrintDebug("Instr (15 bytes) at %p:\n", (void *)(addr_t)instr);
+    PrintTraceMemDump(instr, 15);
+#endif  
+
+
+    if (v3_basic_mem_decode(info, (addr_t)instr, &instr_info) == -1) {
+       PrintError("Could not do a basic memory instruction decode\n");
+       V3_Free(data_page);
+       return -1;
+    }
+
+    // Read the data directly onto the emulated page
+    ret = read(read_gpa, (void *)(data_page->page_addr + data_addr_offset), instr_info.op_size, private_data);
+    if ((ret == -1) || ((uint_t)ret != instr_info.op_size)) {
+       PrintError("Read error in emulator\n");
+       return -1;
+    }
+
+ 
+
+    // setup_code_page(info, instr, &instr_info);
+    set_stepping(info);
+
+    info->emulator.running = 1;
+    info->run_state = VM_EMULATING;
+    info->emulator.instr_length = instr_info.instr_length;
+
+    return 0;
+}
+
+
+
+int v3_emulate_memory_write(struct guest_info * info, addr_t write_gva,
+                           int (*write)(addr_t write_addr, void * src, uint_t length, void * priv_data), 
+                           addr_t write_gpa, void * private_data) {
+
+    struct basic_instr_info instr_info;
+    uchar_t instr[15];
+    int ret;
+    addr_t data_addr_offset = PAGE_OFFSET(write_gva);
+    int i;
+
+    PrintDebug("Emulating Write for instruction at 0x%p\n", (void *)(addr_t)(info->rip));
+
+    if (info->mem_mode == PHYSICAL_MEM) { 
+       ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+    } else { 
+       ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+    }
+
+
+  
+    if (v3_basic_mem_decode(info, (addr_t)instr, &instr_info) == -1) {
+       PrintError("Could not do a basic memory instruction decode\n");
+       V3_Free(write_op);
+       V3_Free(data_page);
+       return -1;
+    }
+
+    if (instr_info.has_rep==1) { 
+       PrintDebug("Emulated instruction has rep\n");
+    }
+
+
+    if (info->emulator.running == 0) {
+       //    setup_code_page(info, instr, &instr_info);
+       set_stepping(info);
+       info->emulator.running = 1;
+       info->run_state = VM_EMULATING;
+       info->emulator.instr_length = instr_info.instr_length;
+    }
+
+    return 0;
+}
+
+
+// end emulation
+int v3_emulation_exit_handler(struct guest_info * info) {
+  
+    unset_stepping(info);
+
+
+    PrintDebug("returning from emulation\n");
+
+    return 0;
+}