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-rw-r--r--tools/llvm-c-test/disassemble.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/tools/llvm-c-test/disassemble.c b/tools/llvm-c-test/disassemble.c
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+++ b/tools/llvm-c-test/disassemble.c
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+/*===-- 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;
+}