Initial commit

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

Makefile

@@ -0,0 +1,14 @@
+PROGRAM	= kvm
+
+OBJS	+= kvm.o
+
+CFLAGS	+= -Iinclude
+
+all: $(PROGRAM)
+
+$(PRORAM): $(OBJS)
+	$(CC) $(OBJS) -o $@
+
+clean:
+	rm -f $(OBJS) $(PROGRAM)
+.PHONY: clean

include/kvm/cpu.h

@@ -0,0 +1,42 @@
+#ifndef KVM__CPU_H
+#define KVM__CPU_H
+
+#include <stdint.h>
+
+enum eflag_bits {
+	EFLAGS_CF		= (1UL << 0),	/* Carry Flag */
+	EFLAGS_PF		= (1UL << 2),	/* Parity Flag */
+	EFLAGS_AF		= (1UL << 4),	/* Auxiliary Carry Flag */
+	EFLAGS_ZF		= (1UL << 6),	/* Zero Flag */
+	EFLAGS_SF		= (1UL << 7),	/* Sign Flag */
+	EFLAGS_TF		= (1UL << 8),	/* Trap Flag */
+	EFLAGS_IF		= (1UL << 9),	/* Interrupt Enable Flag */
+	EFLAGS_DF		= (1UL << 10),	/* Direction Flag */
+	EFLAGS_OF		= (1UL << 11),	/* Overflow Flag */
+	EFLAGS_NT		= (1UL << 14),	/* Nested Task */
+	EFLAGS_RF		= (1UL << 16),	/* Resume Flag */
+	EFLAGS_VM		= (1UL << 17),	/* Virtual-8086 Mode */
+	EFLAGS_AC		= (1UL << 18),	/* Alignment Check */
+	EFLAGS_VIF		= (1UL << 19),	/* Virtual Interrupt Flag */
+	EFLAGS_VIP		= (1UL << 20),	/* Virtual Interrupt Pending */
+	EFLAGS_ID		= (1UL << 21),	/* ID Flag */
+};
+
+struct cpu_registers {
+	uint32_t		eax;
+	uint32_t		ebx;
+	uint32_t		ecx;
+	uint32_t		edx;
+	uint32_t		esp;
+	uint32_t		ebp;
+	uint32_t		esi;
+	uint32_t		edi;
+	uint32_t		eip;
+	uint32_t		eflags;
+};
+
+struct cpu {
+	struct cpu_registers	regs;	
+};
+
+#endif /* KVM__CPU_H */

kvm.c

@@ -0,0 +1,37 @@
+#include "kvm/cpu.h"
+
+#include <stdlib.h>
+#include <fcntl.h>
+
+static void die(const char *s)
+{
+	perror(s);
+	exit(1);
+}
+
+static void cpu__reset(struct cpu *self)
+{
+	self->regs.eip		= 0x000fff0UL;
+	self->regs.eflags	= 0x0000002UL;
+}
+
+static struct cpu *cpu__new(void)
+{
+	return calloc(1, sizeof(struct cpu));
+}
+
+int main(int argc, char *argv[])
+{
+	struct cpu *cpu;
+	int fd;
+
+	fd = open("/dev/kvm", O_RDWR);
+	if (fd < 0)
+		die("open");
+
+	cpu = cpu__new();
+
+	cpu__reset(cpu);
+
+	return 0;
+}