X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_emulate.h;fp=palacios%2Finclude%2Fpalacios%2Fvmm_emulate.h;h=0000000000000000000000000000000000000000;hb=1c63b0651a5d039076d8027c7cd87960e4151408;hp=d4288a2a606877d723f580ae31ee5c22bcd6b80b;hpb=b527f44a71d32952d7b129a7ce5dbeb3969fb8d2;p=palacios.releases.git diff --git a/palacios/include/palacios/vmm_emulate.h b/palacios/include/palacios/vmm_emulate.h deleted file mode 100644 index d4288a2..0000000 --- a/palacios/include/palacios/vmm_emulate.h +++ /dev/null @@ -1,474 +0,0 @@ -#ifndef __VMM_EMULATE_H -#define __VMM_EMULATE_H -#include - - -/* - * This is where we do the hideous X86 instruction parsing among other things - * We can parse out the instruction prefixes, as well as decode the operands - */ - - -/* - * JRL: Some of this was taken from the Xen sources... - */ - -#define PACKED __attribute__((packed)) - -#define MODRM_MOD(x) ((x >> 6) & 0x3) -#define MODRM_REG(x) ((x >> 3) & 0x7) -#define MODRM_RM(x) (x & 0x7) - -struct modrm_byte { - uint_t rm : 3 PACKED; - uint_t reg : 3 PACKED; - uint_t mod : 2 PACKED; -}; - - -#define SIB_BASE(x) ((x >> 6) & 0x3) -#define SIB_INDEX(x) ((x >> 3) & 0x7) -#define SIB_SCALE(x) (x & 0x7) - -struct sib_byte { - uint_t base : 3 PACKED; - uint_t index : 3 PACKED; - uint_t scale : 2 PACKED; -}; - - - -#define MAKE_INSTR(nm, ...) static const uchar_t OPCODE_##nm[] = { __VA_ARGS__ } - -/* - * Here's how it works: - * First byte: Length. - * Following bytes: Opcode bytes. - * Special case: Last byte, if zero, doesn't need to match. - */ -MAKE_INSTR(INVD, 2, 0x0f, 0x08); -MAKE_INSTR(CPUID, 2, 0x0f, 0xa2); -MAKE_INSTR(RDMSR, 2, 0x0f, 0x32); -MAKE_INSTR(WRMSR, 2, 0x0f, 0x30); -MAKE_INSTR(RDTSC, 2, 0x0f, 0x31); -MAKE_INSTR(RDTSCP, 3, 0x0f, 0x01, 0xf9); -MAKE_INSTR(CLI, 1, 0xfa); -MAKE_INSTR(STI, 1, 0xfb); -MAKE_INSTR(RDPMC, 2, 0x0f, 0x33); -MAKE_INSTR(CLGI, 3, 0x0f, 0x01, 0xdd); -MAKE_INSTR(STGI, 3, 0x0f, 0x01, 0xdc); -MAKE_INSTR(VMRUN, 3, 0x0f, 0x01, 0xd8); -MAKE_INSTR(VMLOAD, 3, 0x0f, 0x01, 0xda); -MAKE_INSTR(VMSAVE, 3, 0x0f, 0x01, 0xdb); -MAKE_INSTR(VMCALL, 3, 0x0f, 0x01, 0xd9); -MAKE_INSTR(PAUSE, 2, 0xf3, 0x90); -MAKE_INSTR(SKINIT, 3, 0x0f, 0x01, 0xde); -MAKE_INSTR(MOV2CR, 3, 0x0f, 0x22, 0x00); -MAKE_INSTR(MOVCR2, 3, 0x0f, 0x20, 0x00); -MAKE_INSTR(MOV2DR, 3, 0x0f, 0x23, 0x00); -MAKE_INSTR(MOVDR2, 3, 0x0f, 0x21, 0x00); -MAKE_INSTR(PUSHF, 1, 0x9c); -MAKE_INSTR(POPF, 1, 0x9d); -MAKE_INSTR(RSM, 2, 0x0f, 0xaa); -MAKE_INSTR(INVLPG, 3, 0x0f, 0x01, 0x00); -MAKE_INSTR(INVLPGA,3, 0x0f, 0x01, 0xdf); -MAKE_INSTR(HLT, 1, 0xf4); -MAKE_INSTR(CLTS, 2, 0x0f, 0x06); -MAKE_INSTR(LMSW, 3, 0x0f, 0x01, 0x00); -MAKE_INSTR(SMSW, 3, 0x0f, 0x01, 0x00); - - -static const uchar_t PREFIX_LOCK = 0xF0; -static const uchar_t PREFIX_REPNE = 0xF2; -static const uchar_t PREFIX_REPNZ = 0xF2; -static const uchar_t PREFIX_REP = 0xF3; -static const uchar_t PREFIX_REPE = 0xF3; -static const uchar_t PREFIX_REPZ = 0xF3; -static const uchar_t PREFIX_CS_OVERRIDE = 0x2E; -static const uchar_t PREFIX_SS_OVERRIDE = 0x36; -static const uchar_t PREFIX_DS_OVERRIDE = 0x3E; -static const uchar_t PREFIX_ES_OVERRIDE = 0x26; -static const uchar_t PREFIX_FS_OVERRIDE = 0x64; -static const uchar_t PREFIX_GS_OVERRIDE = 0x65; -static const uchar_t PREFIX_BR_NOT_TAKEN = 0x2E; -static const uchar_t PREFIX_BR_TAKEN = 0x3E; -static const uchar_t PREFIX_OP_SIZE = 0x66; -static const uchar_t PREFIX_ADDR_SIZE = 0x67; - - -static inline int is_prefix_byte(char byte) { - switch (byte) { - case 0xF0: // lock - case 0xF2: // REPNE/REPNZ - case 0xF3: // REP or REPE/REPZ - case 0x2E: // CS override or Branch hint not taken (with Jcc instrs) - case 0x36: // SS override - case 0x3E: // DS override or Branch hint taken (with Jcc instrs) - case 0x26: // ES override - case 0x64: // FS override - case 0x65: // GS override - //case 0x2E: // branch not taken hint - // case 0x3E: // branch taken hint - case 0x66: // operand size override - case 0x67: // address size override - return 1; - break; - default: - return 0; - break; - } -} - - -static inline v3_reg_t get_gpr_mask(struct guest_info * info) { - switch (info->cpu_mode) { - case REAL: - return 0xffff; - break; - case PROTECTED: - case PROTECTED_PG: - return 0xffffffff; - default: - V3_ASSERT(0); - return 0; - } -} - - -static inline addr_t get_addr_linear(struct guest_info * info, addr_t addr, struct v3_segment * seg) { - switch (info->cpu_mode) { - case REAL: - return addr + (seg->selector << 4); - break; - case PROTECTED: - case PROTECTED_PG: - return addr + seg->base; - break; - default: - V3_ASSERT(0); - return 0; - } -} - - -typedef enum {INVALID_ADDR_TYPE, REG, DISP0, DISP8, DISP16, DISP32} modrm_mode_t; -typedef enum {INVALID_REG_SIZE, REG64, REG32, REG16, REG8} reg_size_t; -typedef enum {INVALID_OPERAND, REG_OPERAND, MEM_OPERAND} operand_type_t; - -struct v3_gprs; - -static inline addr_t decode_register(struct v3_gprs * gprs, char reg_code, reg_size_t reg_size) { - addr_t reg_addr; - - switch (reg_code) { - case 0: - reg_addr = (addr_t)&(gprs->rax); - break; - case 1: - reg_addr = (addr_t)&(gprs->rcx); - break; - case 2: - reg_addr = (addr_t)&(gprs->rdx); - break; - case 3: - reg_addr = (addr_t)&(gprs->rbx); - break; - case 4: - if (reg_size == REG8) { - reg_addr = (addr_t)&(gprs->rax) + 1; - } else { - reg_addr = (addr_t)&(gprs->rsp); - } - break; - case 5: - if (reg_size == REG8) { - reg_addr = (addr_t)&(gprs->rcx) + 1; - } else { - reg_addr = (addr_t)&(gprs->rbp); - } - break; - case 6: - if (reg_size == REG8) { - reg_addr = (addr_t)&(gprs->rdx) + 1; - } else { - reg_addr = (addr_t)&(gprs->rsi); - } - break; - case 7: - if (reg_size == REG8) { - reg_addr = (addr_t)&(gprs->rbx) + 1; - } else { - reg_addr = (addr_t)&(gprs->rdi); - } - break; - default: - reg_addr = 0; - break; - } - - return reg_addr; -} - - - -static inline operand_type_t decode_operands16(struct v3_gprs * gprs, // input/output - char * modrm_instr, // input - int * offset, // output - addr_t * first_operand, // output - addr_t * second_operand, // output - reg_size_t reg_size) { // input - - struct modrm_byte * modrm = (struct modrm_byte *)modrm_instr; - addr_t base_addr = 0; - modrm_mode_t mod_mode = 0; - operand_type_t addr_type = INVALID_OPERAND; - char * instr_cursor = modrm_instr; - - PrintDebug("ModRM mod=%d\n", modrm->mod); - - instr_cursor += 1; - - if (modrm->mod == 3) { - mod_mode = REG; - addr_type = REG_OPERAND; - PrintDebug("first operand = Register (RM=%d)\n",modrm->rm); - - *first_operand = decode_register(gprs, modrm->rm, reg_size); - - } else { - - addr_type = MEM_OPERAND; - - if (modrm->mod == 0) { - mod_mode = DISP0; - } else if (modrm->mod == 1) { - mod_mode = DISP8; - } else if (modrm->mod == 2) { - mod_mode = DISP16; - } - - switch (modrm->rm) { - case 0: - base_addr = gprs->rbx + gprs->rsi; - break; - case 1: - base_addr = gprs->rbx + gprs->rdi; - break; - case 2: - base_addr = gprs->rbp + gprs->rsi; - break; - case 3: - base_addr = gprs->rbp + gprs->rdi; - break; - case 4: - base_addr = gprs->rsi; - break; - case 5: - base_addr = gprs->rdi; - break; - case 6: - if (modrm->mod == 0) { - base_addr = 0; - mod_mode = DISP16; - } else { - base_addr = gprs->rbp; - } - break; - case 7: - base_addr = gprs->rbx; - break; - } - - - - if (mod_mode == DISP8) { - base_addr += (uchar_t)*(instr_cursor); - instr_cursor += 1; - } else if (mod_mode == DISP16) { - base_addr += (ushort_t)*(instr_cursor); - instr_cursor += 2; - } - - *first_operand = base_addr; - } - - *offset += (instr_cursor - modrm_instr); - *second_operand = decode_register(gprs, modrm->reg, reg_size); - - return addr_type; -} - - - -static inline operand_type_t decode_operands32(struct v3_gprs * gprs, // input/output - char * modrm_instr, // input - int * offset, // output - addr_t * first_operand, // output - addr_t * second_operand, // output - reg_size_t reg_size) { // input - - char * instr_cursor = modrm_instr; - struct modrm_byte * modrm = (struct modrm_byte *)modrm_instr; - addr_t base_addr = 0; - modrm_mode_t mod_mode = 0; - uint_t has_sib_byte = 0; - operand_type_t addr_type = INVALID_OPERAND; - - - - instr_cursor += 1; - - if (modrm->mod == 3) { - mod_mode = REG; - addr_type = REG_OPERAND; - - PrintDebug("first operand = Register (RM=%d)\n",modrm->rm); - - *first_operand = decode_register(gprs, modrm->rm, reg_size); - - } else { - - addr_type = MEM_OPERAND; - - if (modrm->mod == 0) { - mod_mode = DISP0; - } else if (modrm->mod == 1) { - mod_mode = DISP8; - } else if (modrm->mod == 2) { - mod_mode = DISP32; - } - - switch (modrm->rm) { - case 0: - base_addr = gprs->rax; - break; - case 1: - base_addr = gprs->rcx; - break; - case 2: - base_addr = gprs->rdx; - break; - case 3: - base_addr = gprs->rbx; - break; - case 4: - has_sib_byte = 1; - break; - case 5: - if (modrm->mod == 0) { - base_addr = 0; - mod_mode = DISP32; - } else { - base_addr = gprs->rbp; - } - break; - case 6: - base_addr = gprs->rsi; - break; - case 7: - base_addr = gprs->rdi; - break; - } - - if (has_sib_byte) { - instr_cursor += 1; - struct sib_byte * sib = (struct sib_byte *)(instr_cursor); - int scale = 1; - - instr_cursor += 1; - - - if (sib->scale == 1) { - scale = 2; - } else if (sib->scale == 2) { - scale = 4; - } else if (sib->scale == 3) { - scale = 8; - } - - - switch (sib->index) { - case 0: - base_addr = gprs->rax; - break; - case 1: - base_addr = gprs->rcx; - break; - case 2: - base_addr = gprs->rdx; - break; - case 3: - base_addr = gprs->rbx; - break; - case 4: - base_addr = 0; - break; - case 5: - base_addr = gprs->rbp; - break; - case 6: - base_addr = gprs->rsi; - break; - case 7: - base_addr = gprs->rdi; - break; - } - - base_addr *= scale; - - - switch (sib->base) { - case 0: - base_addr += gprs->rax; - break; - case 1: - base_addr += gprs->rcx; - break; - case 2: - base_addr += gprs->rdx; - break; - case 3: - base_addr += gprs->rbx; - break; - case 4: - base_addr += gprs->rsp; - break; - case 5: - if (modrm->mod != 0) { - base_addr += gprs->rbp; - } - break; - case 6: - base_addr += gprs->rsi; - break; - case 7: - base_addr += gprs->rdi; - break; - } - - } - - - if (mod_mode == DISP8) { - base_addr += (uchar_t)*(instr_cursor); - instr_cursor += 1; - } else if (mod_mode == DISP32) { - base_addr += (uint_t)*(instr_cursor); - instr_cursor += 4; - } - - - *first_operand = base_addr; - } - - *offset += (instr_cursor - modrm_instr); - - *second_operand = decode_register(gprs, modrm->reg, reg_size); - - return addr_type; -} - - - - -#endif