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 #include <string.h> 22 23 static void pprint(int pos, unsigned char *buf, int len, const char *disasm) { 24 int i; 25 printf("%04x: ", pos); 26 for (i = 0; i < 8; i++) { 27 if (i < len) { 28 printf("%02x ", buf[i]); 29 } else { 30 printf(" "); 31 } 32 } 33 34 printf(" %s\n", disasm); 35 } 36 37 static void do_disassemble(const char *triple, const char *features, 38 unsigned char *buf, int siz) { 39 LLVMDisasmContextRef D = LLVMCreateDisasmCPUFeatures(triple, "", features, 40 NULL, 0, NULL, NULL); 41 char outline[1024]; 42 int pos; 43 44 if (!D) { 45 printf("ERROR: Couldn't create disassembler for triple %s\n", triple); 46 return; 47 } 48 49 pos = 0; 50 while (pos < siz) { 51 size_t l = LLVMDisasmInstruction(D, buf + pos, siz - pos, 0, outline, 52 sizeof(outline)); 53 if (!l) { 54 pprint(pos, buf + pos, 1, "\t???"); 55 pos++; 56 } else { 57 pprint(pos, buf + pos, l, outline); 58 pos += l; 59 } 60 } 61 62 LLVMDisasmDispose(D); 63 } 64 65 static void handle_line(char **tokens, int ntokens) { 66 unsigned char disbuf[128]; 67 size_t disbuflen = 0; 68 const char *triple = tokens[0]; 69 const char *features = tokens[1]; 70 int i; 71 72 printf("triple: %s, features: %s\n", triple, features); 73 if (!strcmp(features, "NULL")) 74 features = ""; 75 76 for (i = 2; i < ntokens; i++) { 77 disbuf[disbuflen++] = strtol(tokens[i], NULL, 16); 78 if (disbuflen >= sizeof(disbuf)) { 79 fprintf(stderr, "Warning: Too long line, truncating\n"); 80 break; 81 } 82 } 83 do_disassemble(triple, features, disbuf, disbuflen); 84 } 85 86 int llvm_disassemble(void) { 87 LLVMInitializeAllTargetInfos(); 88 LLVMInitializeAllTargetMCs(); 89 LLVMInitializeAllDisassemblers(); 90 91 llvm_tokenize_stdin(handle_line); 92 93 return 0; 94 } 95