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86 lines
2.1 KiB
86 lines
2.1 KiB
/* Capstone Disassembly Engine */ |
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2015 */ |
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// This sample code demonstrates the option CS_OPT_MNEMONIC |
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// to customize instruction mnemonic. |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <capstone/platform.h> |
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#include <capstone/capstone.h> |
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#define X86_CODE32 "\x75\x01" |
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// Print out the input code in hexadecimal format |
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static void print_string_hex(unsigned char *str, size_t len) |
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{ |
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unsigned char *c; |
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for (c = str; c < str + len; c++) { |
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printf("%02x ", *c & 0xff); |
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} |
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printf("\t"); |
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} |
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// Print one instruction |
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static void print_insn(csh handle) |
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{ |
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cs_insn *insn; |
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size_t count; |
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count = cs_disasm(handle, (const uint8_t *)X86_CODE32, sizeof(X86_CODE32) - 1, 0x1000, 1, &insn); |
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if (count) { |
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print_string_hex((unsigned char *)X86_CODE32, sizeof(X86_CODE32) - 1); |
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printf("\t%s\t%s\n", insn[0].mnemonic, insn[0].op_str); |
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// Free memory allocated by cs_disasm() |
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cs_free(insn, count); |
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} else { |
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printf("ERROR: Failed to disasm given code!\n"); |
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abort(); |
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} |
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} |
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static void test() |
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{ |
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csh handle; |
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cs_err err; |
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// Customize mnemonic JNE to "jnz" |
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cs_opt_mnem my_mnem = { X86_INS_JNE, "jnz" }; |
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// Set .mnemonic to NULL to reset to default mnemonic |
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cs_opt_mnem default_mnem = { X86_INS_JNE, NULL }; |
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err = cs_open(CS_ARCH_X86, CS_MODE_32, &handle); |
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if (err) { |
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printf("Failed on cs_open() with error returned: %u\n", err); |
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abort(); |
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} |
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// 1. Print out the instruction in default setup. |
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printf("Disassemble X86 code with default instruction mnemonic\n"); |
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print_insn(handle); |
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// Customized mnemonic JNE to JNZ using CS_OPT_MNEMONIC option |
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printf("\nNow customize engine to change mnemonic from 'JNE' to 'JNZ'\n"); |
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cs_option(handle, CS_OPT_MNEMONIC, (size_t)&my_mnem); |
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// 2. Now print out the instruction in newly customized setup. |
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print_insn(handle); |
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// Reset engine to use the default mnemonic of JNE |
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printf("\nReset engine to use the default mnemonic\n"); |
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cs_option(handle, CS_OPT_MNEMONIC, (size_t)&default_mnem); |
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// 3. Now print out the instruction in default setup. |
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print_insn(handle); |
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// Done |
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cs_close(&handle); |
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} |
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int main() |
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{ |
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test(); |
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return 0; |
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}
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