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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>
#include <string.h>
static void pprint(int pos, unsigned char *buf, int len, const char *disasm) {
int i;
printf("%04x: ", pos);
for (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, const char *features,
unsigned char *buf, int siz) {
LLVMDisasmContextRef D = LLVMCreateDisasmCPUFeatures(triple, "", features,
NULL, 0, NULL, NULL);
char outline[1024];
int pos;
if (!D) {
printf("ERROR: Couldn't create disassembler for triple %s\n", triple);
return;
}
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;
const char *triple = tokens[0];
const char *features = tokens[1];
int i;
printf("triple: %s, features: %s\n", triple, features);
if (!strcmp(features, "NULL"))
features = "";
for (i = 2; 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, features, disbuf, disbuflen);
}
int disassemble(void) {
LLVMInitializeAllTargetInfos();
LLVMInitializeAllTargetMCs();
LLVMInitializeAllDisassemblers();
tokenize_stdin(handle_line);
return 0;
}
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