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9180c5c3f6
This makes it less likely to clash with other stuff that might be linked in by change, e.g. ncurses exposes an external function called simply "echo", so linking ncurses statically into the binary explodes in funny ways. llvm-svn: 259882
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*===-- disassemble.c - tool for testing libLLVM and llvm-c API -----------===*\
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|* *|
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|* The LLVM Compiler Infrastructure *|
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|* *|
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|* This file is distributed under the University of Illinois Open Source *|
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|* License. See LICENSE.TXT for details. *|
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|* *|
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|*===----------------------------------------------------------------------===*|
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|* *|
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|* This file implements the --disassemble command in llvm-c-test. *|
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|* --disassemble reads lines from stdin, parses them as a triple and hex *|
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|* machine code, and prints disassembly of the machine code. *|
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|* *|
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\*===----------------------------------------------------------------------===*/
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#include "llvm-c-test.h"
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#include "llvm-c/Disassembler.h"
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#include "llvm-c/Target.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void pprint(int pos, unsigned char *buf, int len, const char *disasm) {
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int i;
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printf("%04x: ", pos);
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for (i = 0; i < 8; i++) {
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if (i < len) {
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printf("%02x ", buf[i]);
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} else {
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printf(" ");
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}
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}
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printf(" %s\n", disasm);
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}
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static void do_disassemble(const char *triple, const char *features,
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unsigned char *buf, int siz) {
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LLVMDisasmContextRef D = LLVMCreateDisasmCPUFeatures(triple, "", features,
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NULL, 0, NULL, NULL);
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char outline[1024];
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int pos;
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if (!D) {
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printf("ERROR: Couldn't create disassembler for triple %s\n", triple);
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return;
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}
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pos = 0;
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while (pos < siz) {
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size_t l = LLVMDisasmInstruction(D, buf + pos, siz - pos, 0, outline,
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sizeof(outline));
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if (!l) {
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pprint(pos, buf + pos, 1, "\t???");
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pos++;
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} else {
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pprint(pos, buf + pos, l, outline);
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pos += l;
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}
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}
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LLVMDisasmDispose(D);
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}
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static void handle_line(char **tokens, int ntokens) {
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unsigned char disbuf[128];
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size_t disbuflen = 0;
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const char *triple = tokens[0];
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const char *features = tokens[1];
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int i;
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printf("triple: %s, features: %s\n", triple, features);
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if (!strcmp(features, "NULL"))
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features = "";
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for (i = 2; i < ntokens; i++) {
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disbuf[disbuflen++] = strtol(tokens[i], NULL, 16);
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if (disbuflen >= sizeof(disbuf)) {
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fprintf(stderr, "Warning: Too long line, truncating\n");
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break;
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}
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}
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do_disassemble(triple, features, disbuf, disbuflen);
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}
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int llvm_disassemble(void) {
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LLVMInitializeAllTargetInfos();
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LLVMInitializeAllTargetMCs();
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LLVMInitializeAllDisassemblers();
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llvm_tokenize_stdin(handle_line);
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return 0;
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}
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