radare2/libr/asm/asm.c
2017-05-30 13:19:21 +02:00

1066 lines
25 KiB
C

/* radare - LGPL - Copyright 2009-2017 - pancake, nibble */
#include <stdio.h>
#include <r_types.h>
#include <r_util.h>
#include <r_asm.h>
#include <spp/spp.h>
#include <config.h>
R_LIB_VERSION (r_asm);
char *directives[] = {
".include", ".error", ".warning",
".echo", ".if", ".ifeq", ".endif",
".else", ".set", ".get", NULL
};
static RAsmPlugin *asm_static_plugins[] = { R_ASM_STATIC_PLUGINS };
static int r_asm_pseudo_align(RAsmCode *acode, RAsmOp *op, char *input) {
acode->code_align = r_num_math (NULL, input);
return 0;
}
static int r_asm_pseudo_string(RAsmOp *op, char *input, int zero) {
int len = strlen (input) - 1;
if (len < 1) {
return 0;
}
// TODO: if not starting with '"'.. give up
if (input[len] == '"') {
input[len] = 0;
}
if (*input == '"') {
input++;
}
len = r_str_unescape (input)+zero;
r_hex_bin2str ((ut8*)input, len, op->buf_hex);
strncpy ((char*)op->buf, input, R_ASM_BUFSIZE - 1);
return len;
}
static inline int r_asm_pseudo_arch(RAsm *a, char *input) {
if (!r_asm_use (a, input)) {
eprintf ("Error: Unknown plugin\n");
return -1;
}
return 0;
}
static inline int r_asm_pseudo_bits(RAsm *a, char *input) {
if (!(r_asm_set_bits (a, r_num_math (NULL, input)))) {
eprintf ("Error: Unsupported bits value\n");
return -1;
}
return 0;
}
static inline int r_asm_pseudo_org(RAsm *a, char *input) {
r_asm_set_pc (a, r_num_math (NULL, input));
return 0;
}
static inline int r_asm_pseudo_hex(RAsmOp *op, char *input) {
int len = r_hex_str2bin (input, op->buf);
strncpy (op->buf_hex, r_str_trim_head_tail (input), R_ASM_BUFSIZE-1);
return len;
}
static inline int r_asm_pseudo_intN(RAsm *a, RAsmOp *op, char *input, int n) {
short s;
int i;
long int l;
ut64 s64 = r_num_math (NULL, input);
if (n != 8 && s64 >> (n * 8)) {
eprintf ("int16 Out is out of range\n");
return 0;
}
// XXX honor endian here
if (n == 2) {
s = (short)s64;
r_write_ble16 (op->buf, s, a->big_endian);
} else if (n == 4) {
i = (int)s64;
r_write_ble32 (op->buf, i, a->big_endian);
} else if (n == 8) {
l = (long int)s64;
r_write_ble64 (op->buf, l, a->big_endian);
} else {
return 0;
}
r_hex_bin2str (op->buf, n, op->buf_hex);
return n;
}
static inline int r_asm_pseudo_int16(RAsm *a, RAsmOp *op, char *input) {
return r_asm_pseudo_intN (a, op, input, 2);
}
static inline int r_asm_pseudo_int32(RAsm *a, RAsmOp *op, char *input) {
return r_asm_pseudo_intN (a, op, input, 4);
}
static inline int r_asm_pseudo_int64(RAsm *a, RAsmOp *op, char *input) {
return r_asm_pseudo_intN (a, op, input, 8);
}
static inline int r_asm_pseudo_byte(RAsmOp *op, char *input) {
int i, len = 0;
r_str_replace_char (input, ',', ' ');
len = r_str_word_count (input);
r_str_word_set0 (input);
for (i = 0; i < len; i++) {
const char *word = r_str_word_get0 (input, i);
int num = (int)r_num_math (NULL, word);
op->buf[i] = num;
}
r_hex_bin2str (op->buf, len, op->buf_hex);
return len;
}
static inline int r_asm_pseudo_fill(RAsmOp *op, char *input) {
int i, repeat=0, size=0, value=0;
sscanf (input, "%d,%d,%d", &repeat, &size, &value); // use r_num?
size *= repeat;
if (size>0) {
for (i=0; i<size; i++)
op->buf[i] = value;
r_hex_bin2str (op->buf, size, op->buf_hex);
} else size = 0;
return size;
}
static void plugin_free(RAsmPlugin *p) {
if (p && p->fini) {
p->fini (NULL);
}
}
R_API RAsm *r_asm_new() {
int i;
RAsm *a = R_NEW0 (RAsm);
if (!a) {
return NULL;
}
a->dataalign = 1;
a->bits = R_SYS_BITS;
a->syntax = R_ASM_SYNTAX_INTEL;
a->plugins = r_list_newf ((RListFree)plugin_free);
if (!a->plugins) {
free (a);
return NULL;
}
for (i = 0; asm_static_plugins[i]; i++) {
r_asm_add (a, asm_static_plugins[i]);
}
return a;
}
R_API int r_asm_setup(RAsm *a, const char *arch, int bits, int big_endian) {
int ret = 0;
ret |= !r_asm_use (a, arch);
ret |= !r_asm_set_bits (a, bits);
return ret;
}
// TODO: spagueti
R_API int r_asm_filter_input(RAsm *a, const char *f) {
if (!a->ifilter) {
a->ifilter = r_parse_new ();
}
if (!r_parse_use (a->ifilter, f)) {
r_parse_free (a->ifilter);
a->ifilter = NULL;
return false;
}
return true;
}
R_API int r_asm_filter_output(RAsm *a, const char *f) {
if (!a->ofilter)
a->ofilter = r_parse_new ();
if (!r_parse_use (a->ofilter, f)) {
r_parse_free (a->ofilter);
a->ofilter = NULL;
return false;
}
return true;
}
R_API RAsm *r_asm_free(RAsm *a) {
if (a) {
if (a->cur && a->cur->fini) {
a->cur->fini (a->cur->user);
}
if (a->plugins) {
r_list_free (a->plugins);
a->plugins = NULL;
}
free (a->cpu);
sdb_free (a->pair);
ht_free (a->flags);
a->pair = NULL;
free (a);
}
return NULL;
}
R_API void r_asm_set_user_ptr(RAsm *a, void *user) {
a->user = user;
}
R_API bool r_asm_add(RAsm *a, RAsmPlugin *foo) {
RListIter *iter;
RAsmPlugin *h;
// TODO: cache foo->name length and use memcmp instead of strcmp
if (!foo->name) {
return false;
}
if (foo->init) {
foo->init (a->user);
}
r_list_foreach (a->plugins, iter, h) {
if (!strcmp (h->name, foo->name)) {
return false;
}
}
r_list_append (a->plugins, foo);
return true;
}
R_API int r_asm_del(RAsm *a, const char *name) {
/* TODO: Implement r_asm_del */
return false;
}
R_API int r_asm_is_valid(RAsm *a, const char *name) {
RAsmPlugin *h;
RListIter *iter;
if (!name || !*name) {
return false;
}
r_list_foreach (a->plugins, iter, h) {
if (!strcmp (h->name, name)) {
return true;
}
}
return false;
}
R_API bool r_asm_use_assembler(RAsm *a, const char *name) {
RAsmPlugin *h;
RListIter *iter;
if (a) {
if (name && *name) {
r_list_foreach (a->plugins, iter, h) {
if (h->assemble && !strcmp (h->name, name)) {
a->acur = h;
return true;
}
}
}
a->acur = NULL;
}
return false;
}
// TODO: this can be optimized using r_str_hash()
R_API int r_asm_use(RAsm *a, const char *name) {
char file[1024];
RAsmPlugin *h;
RListIter *iter;
if (!a || !name) {
return false;
}
r_list_foreach (a->plugins, iter, h) {
if (!strcmp (h->name, name) && h->arch) {
if (!a->cur || (a->cur && strcmp (a->cur->arch, h->arch))) {
//const char *dop = r_config_get (core->config, "dir.opcodes");
// TODO: allow configurable path for sdb files
snprintf (file, sizeof (file), R_ASM_OPCODES_PATH"/%s.sdb", h->arch);
sdb_free (a->pair);
r_asm_set_cpu (a, NULL);
a->pair = sdb_new (NULL, file, 0);
}
a->cur = h;
return true;
}
}
sdb_free (a->pair);
a->pair = NULL;
return false;
}
R_API int r_asm_set_subarch(RAsm *a, const char *name) {
if (a->cur && a->cur->set_subarch) {
return a->cur->set_subarch(a, name);
}
return false;
}
static int has_bits(RAsmPlugin *h, int bits) {
return (h && h->bits && (bits & h->bits));
}
R_API void r_asm_set_cpu(RAsm *a, const char *cpu) {
if (a) {
free (a->cpu);
}
a->cpu = cpu? strdup (cpu): NULL;
}
R_API int r_asm_set_bits(RAsm *a, int bits) {
if (has_bits (a->cur, bits)) {
a->bits = bits; // TODO : use OR? :)
return true;
}
return false;
}
R_API bool r_asm_set_big_endian(RAsm *a, bool b) {
if (!a || !a->cur) {
return false;
}
a->big_endian = false; //little endian by default
switch (a->cur->endian) {
case R_SYS_ENDIAN_NONE:
case R_SYS_ENDIAN_BI:
// let user select
a->big_endian = b;
break;
case R_SYS_ENDIAN_LITTLE:
a->big_endian = false;
break;
case R_SYS_ENDIAN_BIG:
a->big_endian = true;
break;
default:
eprintf ("RAsmPlugin doesn't specify endianness\n");
break;
}
return a->big_endian;
}
R_API int r_asm_set_syntax(RAsm *a, int syntax) {
switch (syntax) {
case R_ASM_SYNTAX_REGNUM:
case R_ASM_SYNTAX_INTEL:
case R_ASM_SYNTAX_MASM:
case R_ASM_SYNTAX_ATT:
case R_ASM_SYNTAX_JZ:
a->syntax = syntax;
return true;
default:
return false;
}
}
R_API int r_asm_set_pc(RAsm *a, ut64 pc) {
a->pc = pc;
return true;
}
R_API int r_asm_disassemble(RAsm *a, RAsmOp *op, const ut8 *buf, int len) {
int oplen, ret;
if (!a || !buf) { // || !op || !buf) {
return -1;
}
ret = op->payload = 0;
op->size = 4;
if (len < 1) {
return 0;
}
op->buf_asm[0] = '\0';
if (a->pcalign) {
const int mod = a->pc % a->pcalign;
if (mod) {
op->size = a->pcalign - mod;
strcpy (op->buf_asm, "unaligned");
*op->buf_hex = 0;
if ((op->size * 4) >= sizeof (op->buf_hex)) {
oplen = (sizeof (op->buf_hex) / 4) - 1;
}
r_hex_bin2str (buf, op->size, op->buf_hex);
return -1;
}
}
if (a->cur && a->cur->disassemble) {
ret = a->cur->disassemble (a, op, buf, len);
}
if (ret < 0) {
ret = 0;
}
oplen = r_asm_op_get_size (op);
oplen = op->size;
if (oplen > len) {
oplen = len;
}
if (oplen < 1) {
oplen = 1;
}
if (!op->buf_asm[0] || op->size < 1 || !strcmp (op->buf_asm, "invalid")) {
if (a->invhex) {
if (a->bits == 16) {
ut16 b = r_read_le16 (buf);
snprintf (op->buf_asm, sizeof (op->buf_asm), ".word 0x%04x", b);
} else {
ut32 b = r_read_le32 (buf);
snprintf (op->buf_asm, sizeof (op->buf_asm), ".dword 0x%08x", b);
}
// TODO: something for 64bits too?
} else {
strcpy (op->buf_asm, "invalid");
}
}
if (a->ofilter) {
r_parse_parse (a->ofilter, op->buf_asm, op->buf_asm);
}
//XXX check against R_ASM_BUFSIZE other oob write
memcpy (op->buf, buf, R_MIN (R_ASM_BUFSIZE - 1, oplen));
*op->buf_hex = 0;
if ((oplen * 4) >= sizeof (op->buf_hex)) {
oplen = (sizeof (op->buf_hex) / 4) - 1;
}
r_hex_bin2str (buf, oplen, op->buf_hex);
return ret;
}
typedef int (*Ase)(RAsm *a, RAsmOp *op, const char *buf);
static Ase findAssembler(RAsm *a, const char *kw) {
Ase ase = NULL;
RAsmPlugin *h;
RListIter *iter;
if (a->acur && a->acur->assemble) {
return a->acur->assemble;
}
r_list_foreach (a->plugins, iter, h) {
if (h->arch && h->assemble
&& has_bits (h, a->bits)
&& !strncmp (a->cur->arch,
h->arch,
strlen (a->cur->arch))) {
if (kw) {
if (strstr (h->name, kw)) {
return h->assemble;
}
} else {
ase = h->assemble;
}
}
}
return ase;
}
static char *replace_directives_for(char *str, char *token) {
RStrBuf *sb = r_strbuf_new ("");
char *p = NULL;
char *q = str;
bool changes = false;
for (;;) {
if (q) p = strstr (q, token);
if (p) {
char *nl = strchr (p, '\n');
if (nl) {
*nl ++ = 0;
}
char _ = *p;
*p = 0;
r_strbuf_append (sb, q);
*p = _;
r_strbuf_appendf (sb, "<{%s}>\n", p + 1);
q = nl;
changes = true;
} else {
if (q) r_strbuf_append (sb, q);
break;
}
}
if (changes) {
free (str);
return r_strbuf_drain (sb);
}
r_strbuf_free (sb);
return str;
}
static char *replace_directives(char *str) {
int i = 0;
char *dir = directives[i++];
char *o = replace_directives_for (str, dir);
while (dir) {
o = replace_directives_for (o, dir);
dir = directives[i++];
}
return o;
}
R_API void r_asm_list_directives() {
int i = 0;
char *dir = directives[i++];
while (dir) {
printf ("%s\n", dir);
dir = directives[i++];
}
}
R_API int r_asm_assemble(RAsm *a, RAsmOp *op, const char *buf) {
int ret = 0;
char *b = strdup (buf);
if (!b) {
return 0;
}
if (a->ifilter) {
r_parse_parse (a->ifilter, buf, b);
}
r_str_case (b, 0); // to-lower
memset (op, 0, sizeof (RAsmOp));
if (a->cur) {
Ase ase = NULL;
if (!a->cur->assemble) {
/* find callback if no assembler support in current plugin */
ase = findAssembler (a, ".ks");
if (!ase) {
ase = findAssembler (a, ".nz");
if (!ase) {
ase = findAssembler (a, NULL);
}
}
} else {
ase = a->cur->assemble;
}
if (ase) {
ret = ase (a, op, b);
}
}
if (op && ret > 0) {
r_hex_bin2str (op->buf, ret, op->buf_hex);
op->size = ret;
op->buf_hex[ret*2] = 0;
strncpy (op->buf_asm, b, R_ASM_BUFSIZE - 1);
}
free (b);
return ret;
}
R_API RAsmCode* r_asm_mdisassemble(RAsm *a, const ut8 *buf, int len) {
RStrBuf *buf_asm;
RAsmCode *acode;
int ret, slen;
ut64 pc = a->pc;
RAsmOp op;
ut64 idx;
if (!(acode = r_asm_code_new ())) {
return NULL;
}
if (!(acode->buf = malloc (1 + len))) {
return r_asm_code_free (acode);
}
memcpy (acode->buf, buf, len);
if (!(acode->buf_hex = calloc (2, len + 1))) {
return r_asm_code_free (acode);
}
r_hex_bin2str (buf, len, acode->buf_hex);
if (!(buf_asm = r_strbuf_new (NULL))) {
return r_asm_code_free (acode);
}
for (idx = ret = slen = 0; idx < len; idx += ret) {
r_asm_set_pc (a, pc + idx);
ret = r_asm_disassemble (a, &op, buf + idx, len - idx);
if (ret < 1) {
ret = 1;
}
if (a->ofilter) {
r_parse_parse (a->ofilter, op.buf_asm, op.buf_asm);
}
r_strbuf_append (buf_asm, op.buf_asm);
r_strbuf_append (buf_asm, "\n");
}
acode->buf_asm = r_strbuf_drain (buf_asm);
acode->len = idx;
return acode;
}
R_API RAsmCode* r_asm_mdisassemble_hexstr(RAsm *a, const char *hexstr) {
RAsmCode *ret;
ut8 *buf;
int len;
if (!(buf = malloc (strlen (hexstr) + 1))) {
return NULL;
}
len = r_hex_str2bin (hexstr, buf);
if (len < 1) {
free (buf);
return NULL;
}
ret = r_asm_mdisassemble (a, buf, (ut64)len);
if (ret && a->ofilter) {
r_parse_parse (a->ofilter, ret->buf_asm, ret->buf_asm);
}
free (buf);
return ret;
}
R_API RAsmCode* r_asm_assemble_file(RAsm *a, const char *file) {
RAsmCode *ac = NULL;
char *f = r_file_slurp (file, NULL);
if (f) {
ac = r_asm_massemble (a, f);
free (f);
}
return ac;
}
static void flag_free_kv(HtKv *kv) {
free (kv->key);
free (kv->value);
free (kv);
}
static char* dup_val(void *v) {
char *str = strdup ((char *)v);
return str;
}
R_API RAsmCode* r_asm_massemble(RAsm *a, const char *buf) {
int labels = 0, num, stage, ret, idx, ctr, i, j, linenum = 0;
char *lbuf = NULL, *ptr2, *ptr = NULL, *ptr_start = NULL;
char *tokens[R_ASM_BUFSIZE], buf_token[R_ASM_BUFSIZE];
RAsmCode *acode = NULL;
RAsmOp op = {0};
ut64 off, pc;
if (!buf) {
return NULL;
}
if (!(a->flags = ht_new (dup_val, flag_free_kv, NULL))) {
return NULL;
}
if (!(acode = r_asm_code_new ())) {
return NULL;
}
if (!(acode->buf_asm = malloc (strlen (buf) + 16))) {
return r_asm_code_free (acode);
}
strncpy (acode->buf_asm, buf, sizeof (acode->buf_asm) - 1);
if (!(acode->buf_hex = malloc (64))) { // WTF unefficient
return r_asm_code_free (acode);
}
*acode->buf_hex = 0;
if (!(acode->buf = malloc (64))) {
return r_asm_code_free (acode);
}
lbuf = strdup (buf);
acode->code_align = 0;
memset (&op, 0, sizeof (op));
/* accept ';' as comments when input is multiline */
{
char *nl = strchr (lbuf, '\n');
if (nl) {
if (strchr (nl + 1, '\n')) {
r_str_replace_char (lbuf, ';', '#');
}
}
}
// XXX: ops like mov eax, $pc+33 fail coz '+' is nov alid number!!!
// XXX: must be handled here to be global.. and not arch-specific
{
char val[32];
snprintf (val, sizeof (val), "0x%"PFMT64x, a->pc);
lbuf = r_str_replace (lbuf, "$$", val, 1);
}
if (a->syscall) {
char val[32];
char *aa, *p = strstr (lbuf, "$sys.");
while (p) {
char *sp = (char*)r_str_closer_chr (p, " \n\r#");
if (sp) {
char osp = *sp;
*sp = 0;
aa = strdup (p);
*sp = osp;
num = r_syscall_get_num (a->syscall, aa+5);
snprintf (val, sizeof (val), "%d", num);
lbuf = r_str_replace (lbuf, aa, val, 1);
free (aa);
}
p = strstr (p + 5, "$sys.");
}
}
if (strchr (lbuf, ':')) {
labels = 1;
}
/* Tokenize */
for (tokens[0] = lbuf, ctr = 0;
ctr < R_ASM_BUFSIZE - 1 &&
((ptr = strchr (tokens[ctr], ';')) ||
(ptr = strchr (tokens[ctr], '\n')) ||
(ptr = strchr (tokens[ctr], '\r')));
tokens[++ctr] = ptr + 1) {
*ptr = '\0';
}
#define isavrseparator(x) ((x)==' '||(x)=='\t'||(x)=='\n'||(x)=='\r'||(x)==' '|| \
(x)==','||(x)==';'||(x)=='['||(x)==']'|| \
(x)=='('||(x)==')'||(x)=='{'||(x)=='}')
/* Stage 0-2: Parse labels*/
/* Stage 3: Assemble */
// XXX: stages must be dynamic. until all equs have been resolved
#define STAGES 5
pc = a->pc;
bool inComment = false;
for (stage = 0; stage < STAGES; stage++) {
if (stage < 2 && !labels) {
continue;
}
inComment = false;
r_asm_set_pc (a, pc);
for (idx = ret = i = j = 0, off = a->pc, acode->buf_hex[0] = '\0';
i <= ctr; i++, idx += ret) {
memset (buf_token, 0, R_ASM_BUFSIZE);
strncpy (buf_token, tokens[i], R_ASM_BUFSIZE - 1);
if (inComment) {
if (!strncmp (ptr_start, "*/", 2)) {
inComment = false;
}
continue;
}
// XXX TODO remove arch-specific hacks
if (!strncmp (a->cur->arch, "avr", 3)) {
for (ptr_start = buf_token; *ptr_start &&
isavrseparator (*ptr_start); ptr_start++);
} else {
for (ptr_start = buf_token; *ptr_start &&
ISSEPARATOR (*ptr_start); ptr_start++);
}
if (!strncmp (ptr_start, "/*", 2)) {
if (!strstr (ptr_start + 2, "*/")) {
inComment = true;
}
continue;
}
ptr = strchr (ptr_start, '#'); /* Comments */
if (ptr && !R_BETWEEN ('0', ptr[1], '9') && ptr[1]!='-') {
*ptr = '\0';
}
r_asm_set_pc (a, a->pc + ret);
off = a->pc;
ret = 0;
if (!*ptr_start) {
continue;
}
linenum ++;
/* labels */
if (labels && (ptr = strchr (ptr_start, ':'))) {
bool is_a_label = true;
char *q = ptr_start;
while (*q) {
if (*q == ' ') {
is_a_label = false;
break;
}
q++;
}
if (is_a_label) {
//if (stage != 2) {
if (ptr_start[1] != 0 && ptr_start[1] != ' ') {
char food[64];
*ptr = 0;
if (acode->code_align) {
off += (acode->code_align - (off % acode->code_align));
}
snprintf (food, sizeof (food), "0x%"PFMT64x"", off);
ht_insert (a->flags, ptr_start, food);
// TODO: warning when redefined
r_asm_code_set_equ (acode, ptr_start, food);
}
//}
ptr_start = ptr + 1;
}
ptr = ptr_start;
}
if (*ptr_start == '\0') {
ret = 0;
continue;
}
if (*ptr_start == '.') { /* pseudo */
/* TODO: move into a separate function */
ptr = ptr_start;
if (!strncmp (ptr, ".intel_syntax", 13)) {
a->syntax = R_ASM_SYNTAX_INTEL;
} else if (!strncmp (ptr, ".att_syntax", 11)) {
a->syntax = R_ASM_SYNTAX_ATT;
} else if (!strncmp (ptr, ".endian", 7)) {
r_asm_set_big_endian (a, atoi (ptr + 7));
} else if (!strncmp (ptr, ".big_endian", 7 + 4)) {
r_asm_set_big_endian (a, true);
} else if (!strncmp (ptr, ".lil_endian", 7 + 4) || !strncmp (ptr, "little_endian", 7 + 6)) {
r_asm_set_big_endian (a, false);
} else if (!strncmp (ptr, ".asciz", 6)) {
r_str_chop (ptr + 8);
ret = r_asm_pseudo_string (&op, ptr + 8, 1);
} else if (!strncmp (ptr, ".string ", 8)) {
r_str_chop (ptr + 8);
ret = r_asm_pseudo_string (&op, ptr + 8, 1);
} else if (!strncmp (ptr, ".ascii", 6)) {
ret = r_asm_pseudo_string (&op, ptr + 7, 0);
} else if (!strncmp (ptr, ".align", 6)) {
ret = r_asm_pseudo_align (acode, &op, ptr + 7);
} else if (!strncmp (ptr, ".arm", 4)) {
r_asm_use (a, "arm");
r_asm_set_bits (a, 32);
ret = 0;
} else if (!strncmp (ptr, ".thumb", 6)) {
r_asm_use (a, "arm");
r_asm_set_bits (a, 16);
ret = 0;
} else if (!strncmp (ptr, ".arch ", 6))
ret = r_asm_pseudo_arch (a, ptr+6);
else if (!strncmp (ptr, ".bits ", 6))
ret = r_asm_pseudo_bits (a, ptr+6);
else if (!strncmp (ptr, ".fill ", 6))
ret = r_asm_pseudo_fill (&op, ptr+6);
else if (!strncmp (ptr, ".kernel ", 8))
r_syscall_setup (a->syscall, a->cur->arch, ptr+8, a->bits);
else if (!strncmp (ptr, ".os ", 4))
r_syscall_setup (a->syscall, a->cur->arch, ptr+4, a->bits);
else if (!strncmp (ptr, ".hex ", 5))
ret = r_asm_pseudo_hex (&op, ptr+5);
else if ((!strncmp (ptr, ".int16 ", 7)) || !strncmp (ptr, ".short ", 7))
ret = r_asm_pseudo_int16 (a, &op, ptr+7);
else if (!strncmp (ptr, ".int32 ", 7))
ret = r_asm_pseudo_int32 (a, &op, ptr+7);
else if (!strncmp (ptr, ".int64 ", 7))
ret = r_asm_pseudo_int64 (a, &op, ptr+7);
else if (!strncmp (ptr, ".size", 5))
ret = true; // do nothing, ignored
else if (!strncmp (ptr, ".section", 8))
ret = true; // do nothing, ignored
else if ((!strncmp (ptr, ".byte ", 6)) || (!strncmp (ptr, ".int8 ", 6)))
ret = r_asm_pseudo_byte (&op, ptr+6);
else if (!strncmp (ptr, ".glob", 5)) { // .global .globl
// eprintf (".global directive not yet implemented\n");
ret = 0;
continue;
} else if (!strncmp (ptr, ".equ ", 5)) {
ptr2 = strchr (ptr + 5, ',');
if (!ptr2)
ptr2 = strchr (ptr + 5, '=');
if (!ptr2)
ptr2 = strchr (ptr + 5, ' ');
if (ptr2) {
*ptr2 = '\0';
r_asm_code_set_equ (acode, ptr + 5, ptr2 + 1);
} else {
eprintf ("Invalid syntax for '.equ': Use '.equ <word> <word>'\n");
}
} else if (!strncmp (ptr, ".org ", 5)) {
ret = r_asm_pseudo_org (a, ptr+5);
off = a->pc;
} else if (!strncmp (ptr, ".text", 5)) {
acode->code_offset = a->pc;
} else if (!strncmp (ptr, ".data", 5)) {
acode->data_offset = a->pc;
} else {
eprintf ("Unknown directive (%s)\n", ptr);
return r_asm_code_free (acode);
}
if (!ret) {
continue;
}
if (ret < 0) {
eprintf ("!!! Oops\n");
return r_asm_code_free (acode);
}
} else { /* Instruction */
char *str = ptr_start;
ptr_start = r_str_chop (str);
if (a->ifilter) {
r_parse_parse (a->ifilter, ptr_start, ptr_start);
}
if (acode->equs) {
if (!*ptr_start) {
continue;
}
str = r_asm_code_equ_replace (acode, strdup (ptr_start));
ret = r_asm_assemble (a, &op, str);
free (str);
} else {
if (!*ptr_start) {
continue;
}
ret = r_asm_assemble (a, &op, ptr_start);
}
}
if (stage == STAGES - 1) {
if (ret < 1) {
eprintf ("Cannot assemble '%s' at line %d\n", ptr_start, linenum);
return r_asm_code_free (acode);
}
acode->len = idx + ret;
char *newbuf = realloc (acode->buf, (idx + ret) * 2);
if (!newbuf) {
return r_asm_code_free (acode);
}
acode->buf = (ut8*)newbuf;
newbuf = realloc (acode->buf_hex, strlen (acode->buf_hex) + strlen (op.buf_hex) + 1);
if (!newbuf) {
return r_asm_code_free (acode);
}
acode->buf_hex = newbuf;
memcpy (acode->buf + idx, op.buf, ret);
strcat (acode->buf_hex, op.buf_hex);
}
}
}
free (lbuf);
return acode;
}
R_API int r_asm_modify(RAsm *a, ut8 *buf, int field, ut64 val) {
if (a->cur && a->cur->modify) {
return a->cur->modify (a, buf, field, val);
}
return false;
}
R_API char *r_asm_op_get_hex(RAsmOp *op) {
return strdup (op->buf_hex);
}
R_API char *r_asm_op_get_asm(RAsmOp *op) {
return strdup (op->buf_asm);
}
R_API int r_asm_op_get_size(RAsmOp *op) {
int len;
if (!op) {
return 0;
}
len = op->size - op->payload;
if (len < 1) {
len = 1;
}
return len;
}
R_API int r_asm_get_offset(RAsm *a, int type, int idx) { // link to rbin
if (a && a->binb.bin && a->binb.get_offset) {
return a->binb.get_offset (a->binb.bin, type, idx);
}
return -1;
}
R_API char *r_asm_describe(RAsm *a, const char* str) {
if (!a->pair) {
return NULL;
}
return sdb_get (a->pair, str, 0);
}
R_API RList* r_asm_get_plugins(RAsm *a) {
return a->plugins;
}
/* new simplified API */
R_API bool r_asm_set_arch(RAsm *a, const char *name, int bits) {
if (!r_asm_use (a, name)) {
return false;
}
return r_asm_set_bits (a, bits);
}
/* to ease the use of the native bindings (not used in r2) */
R_API char *r_asm_to_string(RAsm *a, ut64 addr, const ut8 *b, int l) {
RAsmCode *code;
r_asm_set_pc (a, addr);
code = r_asm_mdisassemble (a, b, l);
if (code) {
char *buf_asm = code->buf_asm;
code->buf_asm = NULL;
r_asm_code_free (code);
return buf_asm;
}
return NULL;
}
R_API ut8 *r_asm_from_string(RAsm *a, ut64 addr, const char *b, int *l) {
RAsmCode *code;
r_asm_set_pc (a, addr);
code = r_asm_massemble (a, b);
if (code) {
ut8 *buf = code->buf;
if (l) *l = code->len;
r_asm_code_free (code);
return buf;
}
return NULL;
}
R_API int r_asm_syntax_from_string(const char *name) {
if (!strcmp (name, "regnum")) {
return R_ASM_SYNTAX_REGNUM;
}
if (!strcmp (name, "jz")) {
return R_ASM_SYNTAX_JZ;
}
if (!strcmp (name, "intel")) {
return R_ASM_SYNTAX_INTEL;
}
if (!strcmp (name, "masm")) {
return R_ASM_SYNTAX_MASM;
}
if (!strcmp (name, "att")) {
return R_ASM_SYNTAX_ATT;
}
return -1;
}
R_API char *r_asm_mnemonics(RAsm *a, int id, bool json) {
if (a && a->cur && a->cur->mnemonics) {
return a->cur->mnemonics (a, id, json);
}
return NULL;
}
R_API int r_asm_mnemonics_byname(RAsm *a, const char *name) {
if (a && a->cur && a->cur->mnemonics) {
int i;
for (i = 0; i < 1024; i++) {
char *n = a->cur->mnemonics (a, i, false);
if (n && !strcmp (n, name)) {
return i;
}
free (n);
}
}
return 0;
}
R_API RAsmCode* r_asm_rasm_assemble(RAsm *a, const char *buf, bool use_spp) {
char *lbuf = strdup (buf);
RAsmCode *acode;
if (use_spp) {
Output out;
out.fout = NULL;
out.cout = r_strbuf_new ("");
r_strbuf_init (out.cout);
struct Proc proc;
spp_proc_set (&proc, "spp", 1);
lbuf = replace_directives (lbuf);
spp_eval (lbuf, &out);
free (lbuf);
lbuf = strdup (r_strbuf_get (out.cout));
}
acode = r_asm_massemble (a, lbuf);
free (lbuf);
return acode;
}