Capstone disassembly/disassembler framework: Core (Arm, Arm64, BPF, EVM, M68K, M680X, MOS65xx, Mips, PPC, RISCV, Sparc, SystemZ, TMS320C64x, Web Assembly, X86, X86_64, XCore) + bindings. (bloaty 依赖)
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/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2014 */
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#include <stdlib.h>
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#include <string.h>
#include "utils.h"
// create a cache for fast id lookup
static unsigned short *make_id2insn(insn_map *insns, unsigned int size)
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{
// NOTE: assume that the max id is always put at the end of insns array
unsigned short max_id = insns[size - 1].id;
unsigned short i;
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unsigned short *cache = (unsigned short *)cs_mem_malloc(sizeof(*cache) * (max_id + 1));
for (i = 1; i < size; i++)
cache[insns[i].id] = i;
return cache;
}
// look for @id in @insns, given its size in @max. first time call will update @cache.
// return 0 if not found
unsigned short insn_find(insn_map *insns, unsigned int max, unsigned int id, unsigned short **cache)
{
if (id > insns[max - 1].id)
return 0;
if (*cache == NULL)
*cache = make_id2insn(insns, max);
return (*cache)[id];
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}
int name2id(name_map* map, int max, const char *name)
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{
int i;
for (i = 0; i < max; i++) {
if (!strcmp(map[i].name, name)) {
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return map[i].id;
}
}
// nothing match
return -1;
}
// count number of positive members in a list.
// NOTE: list must be guaranteed to end in 0
unsigned int count_positive(unsigned char *list)
{
unsigned int c;
for (c = 0; list[c] > 0; c++);
return c;
}
char *cs_strdup(const char *str)
{
size_t len = strlen(str)+ 1;
void *new = cs_mem_malloc(len);
if (new == NULL)
return NULL;
return (char *)memmove(new, str, len);
}
// we need this since Windows doesnt have snprintf()
int cs_snprintf(char *buffer, size_t size, const char *fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
ret = cs_vsnprintf(buffer, size, fmt, ap);
va_end(ap);
return ret;
}