1/*===-- disassemble.c - tool for testing libLLVM and llvm-c API -----------===*\ 2|* *| 3|* The LLVM Compiler Infrastructure *| 4|* *| 5|* This file is distributed under the University of Illinois Open Source *| 6|* License. See LICENSE.TXT for details. *| 7|* *| 8|*===----------------------------------------------------------------------===*| 9|* *| 10|* This file implements the --disassemble command in llvm-c-test. *| 11|* --disassemble reads lines from stdin, parses them as a triple and hex *| 12|* machine code, and prints disassembly of the machine code. *| 13|* *| 14\*===----------------------------------------------------------------------===*/ 15 16#include "llvm-c-test.h" 17#include "llvm-c/Disassembler.h" 18#include "llvm-c/Target.h" 19#include <stdio.h> 20#include <stdlib.h> 21 22static void pprint(int pos, unsigned char *buf, int len, const char *disasm) { 23 int i; 24 printf("%04x: ", pos); 25 for (i = 0; i < 8; i++) { 26 if (i < len) { 27 printf("%02x ", buf[i]); 28 } else { 29 printf(" "); 30 } 31 } 32 33 printf(" %s\n", disasm); 34} 35 36static void do_disassemble(const char *triple, unsigned char *buf, int siz) { 37 LLVMDisasmContextRef D = LLVMCreateDisasm(triple, NULL, 0, NULL, NULL); 38 char outline[1024]; 39 int pos; 40 41 if (!D) { 42 printf("ERROR: Couldn't create disassebler for triple %s\n", triple); 43 return; 44 } 45 46 pos = 0; 47 while (pos < siz) { 48 size_t l = LLVMDisasmInstruction(D, buf + pos, siz - pos, 0, outline, 49 sizeof(outline)); 50 if (!l) { 51 pprint(pos, buf + pos, 1, "\t???"); 52 pos++; 53 } else { 54 pprint(pos, buf + pos, l, outline); 55 pos += l; 56 } 57 } 58 59 LLVMDisasmDispose(D); 60} 61 62static void handle_line(char **tokens, int ntokens) { 63 unsigned char disbuf[128]; 64 size_t disbuflen = 0; 65 char *triple = tokens[0]; 66 int i; 67 68 printf("triple: %s\n", triple); 69 70 for (i = 1; i < ntokens; i++) { 71 disbuf[disbuflen++] = strtol(tokens[i], NULL, 16); 72 if (disbuflen >= sizeof(disbuf)) { 73 fprintf(stderr, "Warning: Too long line, truncating\n"); 74 break; 75 } 76 } 77 do_disassemble(triple, disbuf, disbuflen); 78} 79 80int disassemble(void) { 81 LLVMInitializeAllTargetInfos(); 82 LLVMInitializeAllTargetMCs(); 83 LLVMInitializeAllDisassemblers(); 84 85 tokenize_stdin(handle_line); 86 87 return 0; 88} 89