-/* NOTE: this header is included in op-i386.c where global register
- variable are used. Care must be used when including glibc headers.
+/*
+ * i386 virtual CPU header
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef CPU_I386_H
#define CPU_I386_H
+#include "config.h"
#include <setjmp.h>
#define R_EAX 0
#define R_FS 4
#define R_GS 5
+/* eflags masks */
#define CC_C 0x0001
#define CC_P 0x0004
#define CC_A 0x0010
#define CC_S 0x0080
#define CC_O 0x0800
-#define TRAP_FLAG 0x0100
-#define INTERRUPT_FLAG 0x0200
-#define DIRECTION_FLAG 0x0400
-#define IOPL_FLAG_MASK 0x3000
-#define NESTED_FLAG 0x4000
-#define BYTE_FL 0x8000 /* Intel reserved! */
-#define RF_FLAG 0x10000
-#define VM_FLAG 0x20000
-/* AC 0x40000 */
-
-#define EXCP00_DIVZ 1
-#define EXCP01_SSTP 2
-#define EXCP02_NMI 3
-#define EXCP03_INT3 4
-#define EXCP04_INTO 5
-#define EXCP05_BOUND 6
-#define EXCP06_ILLOP 7
-#define EXCP07_PREX 8
-#define EXCP08_DBLE 9
-#define EXCP09_XERR 10
-#define EXCP0A_TSS 11
-#define EXCP0B_NOSEG 12
-#define EXCP0C_STACK 13
-#define EXCP0D_GPF 14
-#define EXCP0E_PAGE 15
-#define EXCP10_COPR 17
-#define EXCP11_ALGN 18
-#define EXCP12_MCHK 19
-
-#define EXCP_SIGNAL 256 /* async signal */
+#define TF_MASK 0x00000100
+#define IF_MASK 0x00000200
+#define DF_MASK 0x00000400
+#define IOPL_MASK 0x00003000
+#define NT_MASK 0x00004000
+#define RF_MASK 0x00010000
+#define VM_MASK 0x00020000
+#define AC_MASK 0x00040000
+#define VIF_MASK 0x00080000
+#define VIP_MASK 0x00100000
+#define ID_MASK 0x00200000
+
+#define EXCP00_DIVZ 0
+#define EXCP01_SSTP 1
+#define EXCP02_NMI 2
+#define EXCP03_INT3 3
+#define EXCP04_INTO 4
+#define EXCP05_BOUND 5
+#define EXCP06_ILLOP 6
+#define EXCP07_PREX 7
+#define EXCP08_DBLE 8
+#define EXCP09_XERR 9
+#define EXCP0A_TSS 10
+#define EXCP0B_NOSEG 11
+#define EXCP0C_STACK 12
+#define EXCP0D_GPF 13
+#define EXCP0E_PAGE 14
+#define EXCP10_COPR 16
+#define EXCP11_ALGN 17
+#define EXCP12_MCHK 18
+
+#define EXCP_INTERRUPT 256 /* async interruption */
enum {
CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
typedef struct CPUX86State {
/* standard registers */
uint32_t regs[8];
- uint32_t pc; /* cs_case + eip value */
- uint32_t eflags;
+ uint32_t eip;
+ uint32_t eflags; /* eflags register. During CPU emulation, CC
+ flags and DF are set to zero because they are
+ stored elsewhere */
/* emulator internal eflags handling */
uint32_t cc_src;
SegmentDescriptorTable ldt;
SegmentDescriptorTable idt;
- /* various CPU modes */
- int vm86;
-
- /* exception handling */
+ /* exception/interrupt handling */
jmp_buf jmp_env;
int exception_index;
+ int interrupt_request;
+
+ /* user data */
+ void *opaque;
} CPUX86State;
+/* all CPU memory access use these macros */
static inline int ldub(void *ptr)
{
return *(uint8_t *)ptr;
return *(int8_t *)ptr;
}
+static inline void stb(void *ptr, int v)
+{
+ *(uint8_t *)ptr = v;
+}
+
+#ifdef WORDS_BIGENDIAN
+
+/* conservative code for little endian unaligned accesses */
+static inline int lduw(void *ptr)
+{
+#ifdef __powerpc__
+ int val;
+ __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
+ return val;
+#else
+ uint8_t *p = ptr;
+ return p[0] | (p[1] << 8);
+#endif
+}
+
+static inline int ldsw(void *ptr)
+{
+#ifdef __powerpc__
+ int val;
+ __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
+ return (int16_t)val;
+#else
+ uint8_t *p = ptr;
+ return (int16_t)(p[0] | (p[1] << 8));
+#endif
+}
+
+static inline int ldl(void *ptr)
+{
+#ifdef __powerpc__
+ int val;
+ __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (ptr));
+ return val;
+#else
+ uint8_t *p = ptr;
+ return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
+#endif
+}
+
+static inline uint64_t ldq(void *ptr)
+{
+ uint8_t *p = ptr;
+ uint32_t v1, v2;
+ v1 = ldl(p);
+ v2 = ldl(p + 4);
+ return v1 | ((uint64_t)v2 << 32);
+}
+
+static inline void stw(void *ptr, int v)
+{
+#ifdef __powerpc__
+ __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*(uint16_t *)ptr) : "r" (v), "r" (ptr));
+#else
+ uint8_t *p = ptr;
+ p[0] = v;
+ p[1] = v >> 8;
+#endif
+}
+
+static inline void stl(void *ptr, int v)
+{
+#ifdef __powerpc__
+ __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*(uint32_t *)ptr) : "r" (v), "r" (ptr));
+#else
+ uint8_t *p = ptr;
+ p[0] = v;
+ p[1] = v >> 8;
+ p[2] = v >> 16;
+ p[3] = v >> 24;
+#endif
+}
+
+static inline void stq(void *ptr, uint64_t v)
+{
+ uint8_t *p = ptr;
+ stl(p, (uint32_t)v);
+ stl(p + 4, v >> 32);
+}
+
+/* float access */
+
+static inline float ldfl(void *ptr)
+{
+ union {
+ float f;
+ uint32_t i;
+ } u;
+ u.i = ldl(ptr);
+ return u.f;
+}
+
+static inline double ldfq(void *ptr)
+{
+ union {
+ double d;
+ uint64_t i;
+ } u;
+ u.i = ldq(ptr);
+ return u.d;
+}
+
+static inline void stfl(void *ptr, float v)
+{
+ union {
+ float f;
+ uint32_t i;
+ } u;
+ u.f = v;
+ stl(ptr, u.i);
+}
+
+static inline void stfq(void *ptr, double v)
+{
+ union {
+ double d;
+ uint64_t i;
+ } u;
+ u.d = v;
+ stq(ptr, u.i);
+}
+
+#else
+
static inline int lduw(void *ptr)
{
return *(uint16_t *)ptr;
return *(uint64_t *)ptr;
}
-static inline void stb(void *ptr, int v)
-{
- *(uint8_t *)ptr = v;
-}
-
static inline void stw(void *ptr, int v)
{
*(uint16_t *)ptr = v;
{
*(double *)ptr = v;
}
+#endif
#ifndef IN_OP_I386
void cpu_x86_outb(int addr, int val);
CPUX86State *cpu_x86_init(void);
int cpu_x86_exec(CPUX86State *s);
+void cpu_x86_interrupt(CPUX86State *s);
void cpu_x86_close(CPUX86State *s);
/* needed to load some predefinied segment registers */
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
+/* you can call this signal handler from your SIGBUS and SIGSEGV
+ signal handlers to inform the virtual CPU of exceptions. non zero
+ is returned if the signal was handled by the virtual CPU. */
+struct siginfo;
+int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
+ void *puc);
+
/* internal functions */
#define GEN_FLAG_CODE32_SHIFT 0
#define GEN_FLAG_ADDSEG_SHIFT 1
-#define GEN_FLAG_ST_SHIFT 2
+#define GEN_FLAG_SS32_SHIFT 2
+#define GEN_FLAG_VM_SHIFT 3
+#define GEN_FLAG_ST_SHIFT 4
+
int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
- int *gen_code_size_ptr, uint8_t *pc_start,
- int flags);
+ int *gen_code_size_ptr,
+ uint8_t *pc_start, uint8_t *cs_base, int flags);
void cpu_x86_tblocks_init(void);
#endif /* CPU_I386_H */
projects / qemu.git / blobdiff