x86_detail.c

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/* Capstone testing regression */
/* By Do Minh Tuan <tuanit96@gmail.com>, 02-2019 */
 
 
#include "factory.h"
 
static void print_string_hex(char **result, const char *comment, unsigned char *str, size_t len)
{
        unsigned char *c;
 
        add_str(result, "%s", comment);
        for (c = str; c < str + len; c++) {
                add_str(result, "0x%02x", *c & 0xff);
                if (c < str + len - 1)
                        add_str(result, " ");
        }
 
}
 
static const char *get_eflag_name(uint64_t flag)
{
        switch(flag) {
                default:
                        return NULL;
                case X86_EFLAGS_UNDEFINED_OF:
                        return "UNDEF_OF";
                case X86_EFLAGS_UNDEFINED_SF:
                        return "UNDEF_SF";
                case X86_EFLAGS_UNDEFINED_ZF:
                        return "UNDEF_ZF";
                case X86_EFLAGS_MODIFY_AF:
                        return "MOD_AF";
                case X86_EFLAGS_UNDEFINED_PF:
                        return "UNDEF_PF";
                case X86_EFLAGS_MODIFY_CF:
                        return "MOD_CF";
                case X86_EFLAGS_MODIFY_SF:
                        return "MOD_SF";
                case X86_EFLAGS_MODIFY_ZF:
                        return "MOD_ZF";
                case X86_EFLAGS_UNDEFINED_AF:
                        return "UNDEF_AF";
                case X86_EFLAGS_MODIFY_PF:
                        return "MOD_PF";
                case X86_EFLAGS_UNDEFINED_CF:
                        return "UNDEF_CF";
                case X86_EFLAGS_MODIFY_OF:
                        return "MOD_OF";
                case X86_EFLAGS_RESET_OF:
                        return "RESET_OF";
                case X86_EFLAGS_RESET_CF:
                        return "RESET_CF";
                case X86_EFLAGS_RESET_DF:
                        return "RESET_DF";
                case X86_EFLAGS_RESET_IF:
                        return "RESET_IF";
                case X86_EFLAGS_RESET_ZF:
                        return "RESET_ZF";
                case X86_EFLAGS_TEST_OF:
                        return "TEST_OF";
                case X86_EFLAGS_TEST_SF:
                        return "TEST_SF";
                case X86_EFLAGS_TEST_ZF:
                        return "TEST_ZF";
                case X86_EFLAGS_TEST_PF:
                        return "TEST_PF";
                case X86_EFLAGS_TEST_CF:
                        return "TEST_CF";
                case X86_EFLAGS_RESET_SF:
                        return "RESET_SF";
                case X86_EFLAGS_RESET_AF:
                        return "RESET_AF";
                case X86_EFLAGS_RESET_TF:
                        return "RESET_TF";
                case X86_EFLAGS_RESET_NT:
                        return "RESET_NT";
                case X86_EFLAGS_PRIOR_OF:
                        return "PRIOR_OF";
                case X86_EFLAGS_PRIOR_SF:
                        return "PRIOR_SF";
                case X86_EFLAGS_PRIOR_ZF:
                        return "PRIOR_ZF";
                case X86_EFLAGS_PRIOR_AF:
                        return "PRIOR_AF";
                case X86_EFLAGS_PRIOR_PF:
                        return "PRIOR_PF";
                case X86_EFLAGS_PRIOR_CF:
                        return "PRIOR_CF";
                case X86_EFLAGS_PRIOR_TF:
                        return "PRIOR_TF";
                case X86_EFLAGS_PRIOR_IF:
                        return "PRIOR_IF";
                case X86_EFLAGS_PRIOR_DF:
                        return "PRIOR_DF";
                case X86_EFLAGS_TEST_NT:
                        return "TEST_NT";
                case X86_EFLAGS_TEST_DF:
                        return "TEST_DF";
                case X86_EFLAGS_RESET_PF:
                        return "RESET_PF";
                case X86_EFLAGS_PRIOR_NT:
                        return "PRIOR_NT";
                case X86_EFLAGS_MODIFY_TF:
                        return "MOD_TF";
                case X86_EFLAGS_MODIFY_IF:
                        return "MOD_IF";
                case X86_EFLAGS_MODIFY_DF:
                        return "MOD_DF";
                case X86_EFLAGS_MODIFY_NT:
                        return "MOD_NT";
                case X86_EFLAGS_MODIFY_RF:
                        return "MOD_RF";
                case X86_EFLAGS_SET_CF:
                        return "SET_CF";
                case X86_EFLAGS_SET_DF:
                        return "SET_DF";
                case X86_EFLAGS_SET_IF:
                        return "SET_IF";
                case X86_EFLAGS_SET_OF:
                        return "SET_OF";
                case X86_EFLAGS_SET_SF:
                        return "SET_SF";
                case X86_EFLAGS_SET_ZF:
                        return "SET_ZF";
                case X86_EFLAGS_SET_AF:
                        return "SET_AF";
                case X86_EFLAGS_SET_PF:
                        return "SET_PF";
                case X86_EFLAGS_TEST_AF:
                        return "TEST_AF";
                case X86_EFLAGS_TEST_TF:
                        return "TEST_TF";
                case X86_EFLAGS_TEST_RF:
                        return "TEST_RF";
                case X86_EFLAGS_RESET_0F:
                        return "RESET_0F";
                case X86_EFLAGS_RESET_AC:
                        return "RESET_AC";
        }
}
 
static const char *get_fpu_flag_name(uint64_t flag)
{
        switch (flag) {
                default:
                        return NULL;
                case X86_FPU_FLAGS_MODIFY_C0:
                        return "MOD_C0";
                case X86_FPU_FLAGS_MODIFY_C1:
                        return "MOD_C1";
                case X86_FPU_FLAGS_MODIFY_C2:
                        return "MOD_C2";
                case X86_FPU_FLAGS_MODIFY_C3:
                        return "MOD_C3";
                case X86_FPU_FLAGS_RESET_C0:
                        return "RESET_C0";
                case X86_FPU_FLAGS_RESET_C1:
                        return "RESET_C1";
                case X86_FPU_FLAGS_RESET_C2:
                        return "RESET_C2";
                case X86_FPU_FLAGS_RESET_C3:
                        return "RESET_C3";
                case X86_FPU_FLAGS_SET_C0:
                        return "SET_C0";
                case X86_FPU_FLAGS_SET_C1:
                        return "SET_C1";
                case X86_FPU_FLAGS_SET_C2:
                        return "SET_C2";
                case X86_FPU_FLAGS_SET_C3:
                        return "SET_C3";
                case X86_FPU_FLAGS_UNDEFINED_C0:
                        return "UNDEF_C0";
                case X86_FPU_FLAGS_UNDEFINED_C1:
                        return "UNDEF_C1";
                case X86_FPU_FLAGS_UNDEFINED_C2:
                        return "UNDEF_C2";
                case X86_FPU_FLAGS_UNDEFINED_C3:
                        return "UNDEF_C3";
                case X86_FPU_FLAGS_TEST_C0:
                        return "TEST_C0";
                case X86_FPU_FLAGS_TEST_C1:
                        return "TEST_C1";
                case X86_FPU_FLAGS_TEST_C2:
                        return "TEST_C2";
                case X86_FPU_FLAGS_TEST_C3:
                        return "TEST_C3";
        }
}
 
char *get_detail_x86(csh *ud, cs_mode mode, cs_insn *ins)
{
        int count, i;
        cs_x86 *x86;
        cs_regs regs_read, regs_write;
        uint8_t regs_read_count, regs_write_count;
        char *result;
 
        result = (char *)malloc(sizeof(char));
        result[0] = '\0';
 
        if (ins->detail == NULL)
                return result;
 
        x86 = &(ins->detail->x86);
 
        print_string_hex(&result, " ; Prefix:", x86->prefix, 4);
        print_string_hex(&result, " ; Opcode:", x86->opcode, 4);
        add_str(&result, " ; rex: 0x%x", x86->rex);
        add_str(&result, " ; addr_size: %u", x86->addr_size);
        add_str(&result, " ; modrm: 0x%x", x86->modrm);
        add_str(&result, " ; disp: 0x%" PRIx64 "", x86->disp);
 
        if ((mode & CS_MODE_16) == 0) {
                add_str(&result, " ; sib: 0x%x", x86->sib);
                if (x86->sib_base != X86_REG_INVALID)
                        add_str(&result, " ; sib_base: %s", cs_reg_name(*ud, x86->sib_base));
                if (x86->sib_index != X86_REG_INVALID)
                        add_str(&result, " ; sib_index: %s", cs_reg_name(*ud, x86->sib_index));
                if (x86->sib_scale != 0)
                        add_str(&result, " ; sib_scale: %d", x86->sib_scale);
        }
 
        if (x86->xop_cc != X86_XOP_CC_INVALID) {
                add_str(&result, " ; xop_cc: %u", x86->xop_cc);
        }
 
        if (x86->sse_cc != X86_SSE_CC_INVALID) {
                add_str(&result, " ; sse_cc: %u", x86->sse_cc);
        }
 
        if (x86->avx_cc != X86_AVX_CC_INVALID) {
                add_str(&result, " ; avx_cc: %u", x86->avx_cc);
        }
 
        if (x86->avx_sae) {
                add_str(&result, " ; avx_sae: %u", x86->avx_sae);
        }
 
        if (x86->avx_rm != X86_AVX_RM_INVALID) {
                add_str(&result, " ; avx_rm: %u", x86->avx_rm);
        }
 
        count = cs_op_count(*ud, ins, X86_OP_IMM);
        if (count > 0) {
                add_str(&result, " ; imm_count: %u", count);
                for (i = 1; i < count + 1; i++) {
                        int index = cs_op_index(*ud, ins, X86_OP_IMM, i);
                        add_str(&result, " ; imms[%u]: 0x%" PRIx64 "", i, x86->operands[index].imm);
                }
        }
 
        if (x86->op_count)
                add_str(&result, " ; op_count: %u", x86->op_count);
 
        for (i = 0; i < x86->op_count; i++) {
                cs_x86_op *op = &(x86->operands[i]);
 
                switch((int)op->type) {
                        case X86_OP_REG:
                                add_str(&result, " ; operands[%u].type: REG = %s", i, cs_reg_name(*ud, op->reg));
                                break;
                        case X86_OP_IMM:
                                add_str(&result, " ; operands[%u].type: IMM = 0x%" PRIx64 "", i, op->imm);
                                break;
                        case X86_OP_MEM:
                                add_str(&result, " ; operands[%u].type: MEM", i);
                                if (op->mem.segment != X86_REG_INVALID)
                                        add_str(&result, " ; operands[%u].mem.segment: REG = %s", i, cs_reg_name(*ud, op->mem.segment));
                                if (op->mem.base != X86_REG_INVALID)
                                        add_str(&result, " ; operands[%u].mem.base: REG = %s", i, cs_reg_name(*ud, op->mem.base));
                                if (op->mem.index != X86_REG_INVALID)
                                        add_str(&result, " ; operands[%u].mem.index: REG = %s", i, cs_reg_name(*ud, op->mem.index));
                                if (op->mem.scale != 1)
                                        add_str(&result, " ; operands[%u].mem.scale: %u", i, op->mem.scale);
                                if (op->mem.disp != 0)
                                        add_str(&result, " ; operands[%u].mem.disp: 0x%" PRIx64 "", i, op->mem.disp);
                                break;
                        default:
                                break;
                }
 
                if (op->avx_bcast != X86_AVX_BCAST_INVALID)
                        add_str(&result, " ; operands[%u].avx_bcast: %u", i, op->avx_bcast);
 
                if (op->avx_zero_opmask != false)
                        add_str(&result, " ; operands[%u].avx_zero_opmask: TRUE", i);
 
                add_str(&result, " ; operands[%u].size: %u", i, op->size);
 
                switch(op->access) {
                        default:
                                break;
                        case CS_AC_READ:
                                add_str(&result, " ; operands[%u].access: READ", i);
                                break;
                        case CS_AC_WRITE:
                                add_str(&result, " ; operands[%u].access: WRITE", i);
                                break;
                        case CS_AC_READ | CS_AC_WRITE:
                                add_str(&result, " ; operands[%u].access: READ | WRITE", i);
                                break;
                }
        }
 
        if (!cs_regs_access(*ud, ins, regs_read, &regs_read_count, regs_write, &regs_write_count)) {
                if (regs_read_count) {
                        add_str(&result, " ; Registers read:");
                        for(i = 0; i < regs_read_count; i++) {
                                add_str(&result, " %s", cs_reg_name(*ud, regs_read[i]));
                        }
                }
 
                if (regs_write_count) {
                        add_str(&result, " ; Registers modified:");
                        for(i = 0; i < regs_write_count; i++) {
                                add_str(&result, " %s", cs_reg_name(*ud, regs_write[i]));
                        }
                }
        }
 
        if (x86->eflags || x86->fpu_flags) {
                for(i = 0; i < ins->detail->groups_count; i++) {
                        if (ins->detail->groups[i] == X86_GRP_FPU) {
                                add_str(&result, " ; FPU_FLAGS:");
                                for(i = 0; i <= 63; i++)
                                        if (x86->fpu_flags & ((uint64_t)1 << i)) {
                                                add_str(&result, " %s", get_fpu_flag_name((uint64_t)1 << i));
                                        }
                                break;
                        }
                }
 
                if (i == ins->detail->groups_count) {
                        add_str(&result, " ; EFLAGS:");
                        for(i = 0; i <= 63; i++)
                                if (x86->eflags & ((uint64_t)1 << i)) {
                                        add_str(&result, " %s", get_eflag_name((uint64_t)1 << i));
                                }
                }
        }
 
        return result;
}