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Diffstat (limited to 'tools/llvm-c-test/disassemble.c')
-rw-r--r-- | tools/llvm-c-test/disassemble.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/tools/llvm-c-test/disassemble.c b/tools/llvm-c-test/disassemble.c new file mode 100644 index 0000000000..4b3d37b7d9 --- /dev/null +++ b/tools/llvm-c-test/disassemble.c @@ -0,0 +1,85 @@ +/*===-- disassemble.c - tool for testing libLLVM and llvm-c API -----------===*\ +|* *| +|* The LLVM Compiler Infrastructure *| +|* *| +|* This file is distributed under the University of Illinois Open Source *| +|* License. See LICENSE.TXT for details. *| +|* *| +|*===----------------------------------------------------------------------===*| +|* *| +|* This file implements the --disassemble command in llvm-c-test. *| +|* --disassemble reads lines from stdin, parses them as a triple and hex *| +|* machine code, and prints disassembly of the machine code. *| +|* *| +\*===----------------------------------------------------------------------===*/ + +#include "llvm-c-test.h" +#include "llvm-c/Disassembler.h" +#include "llvm-c/Target.h" +#include <stdio.h> +#include <stdlib.h> + +static void pprint(int pos, unsigned char *buf, int len, const char *disasm) { + printf("%04x: ", pos); + for (int i = 0; i < 8; i++) { + if (i < len) { + printf("%02x ", buf[i]); + } else { + printf(" "); + } + } + + printf(" %s\n", disasm); +} + +static void do_disassemble(const char *triple, unsigned char *buf, int siz) { + LLVMDisasmContextRef D = LLVMCreateDisasm(triple, NULL, 0, NULL, NULL); + + if (!D) { + printf("ERROR: Couldn't create disassebler for triple %s\n", triple); + return; + } + + char outline[1024]; + int pos = 0; + while (pos < siz) { + size_t l = LLVMDisasmInstruction(D, buf + pos, siz - pos, 0, outline, + sizeof(outline)); + if (!l) { + pprint(pos, buf + pos, 1, "\t???"); + pos++; + } else { + pprint(pos, buf + pos, l, outline); + pos += l; + } + } + + LLVMDisasmDispose(D); +} + +static void handle_line(char **tokens, int ntokens) { + unsigned char disbuf[128]; + size_t disbuflen = 0; + char *triple = tokens[0]; + + printf("triple: %s\n", triple); + + for (int i = 1; i < ntokens; i++) { + disbuf[disbuflen++] = strtol(tokens[i], NULL, 16); + if (disbuflen >= sizeof(disbuf)) { + fprintf(stderr, "Warning: Too long line, truncating\n"); + break; + } + } + do_disassemble(triple, disbuf, disbuflen); +} + +int disassemble(void) { + LLVMInitializeAllTargetInfos(); + LLVMInitializeAllTargetMCs(); + LLVMInitializeAllDisassemblers(); + + tokenize_stdin(handle_line); + + return 0; +} |