int gdbr_server_read(libgdbr_t *g, char *buf, size_t max_len) {
bool loop_continue;
int ret;
if (!g) {
return -1;
}
memset (buf, 0, max_len);
do {
loop_continue = false;
read_packet (g);
while (!*g->data) {
read_packet (g);
}
if (r_str_startswith (g->data, "qSupported")) {
loop_continue = true;
if ((ret = _server_handle_qSupported (g)) < 0) {
return ret;
}
} else if (r_str_startswith (g->data, "qTStatus")) {
loop_continue = true;
if ((ret = _server_handle_qTStatus (g)) < 0) {
return ret;
}
} else if (r_str_startswith (g->data, "qC")) {
if ((ret = _server_handle_qC (g, buf, max_len)) < 0) {
return ret;
}
}
} while (loop_continue);
return ret;
}
static int lang_lib_file_run (RLang *user, const char *file) {
char *libpath;
void *lib;
if (!(libpath = r_str_new (file))) {
return -1;
}
if (!r_str_startswith (libpath, "/") && !r_str_startswith (libpath, "./")) {
libpath = r_str_prefix (libpath, "./");
}
if (!r_file_exists (libpath)) {
if (!r_str_endswith (libpath, R_LIB_EXT)) {
libpath = r_str_appendf (libpath, ".%s", R_LIB_EXT);
}
}
if (!r_file_exists (libpath)) {
free (libpath);
return -1;
}
lib = r_lib_dl_open (libpath);
if (lib) {
void (*fcn)(RCore *);
fcn = r_lib_dl_sym (lib, "entry");
if (fcn) {
fcn (user->user);
} else {
eprintf ("Cannot find 'entry' symbol in library\n");
}
r_lib_dl_close (lib);
}
free (libpath);
return 0;
}
static int __io_posix_open(const char *file, int perm, int mode) {
int fd;
if (r_str_startswith (file, "file://")) {
file += strlen ("file://");
}
if (r_file_is_directory (file)) {
return -1;
}
#if __WINDOWS__
// probably unnecessary to have this ifdef nowadays windows is posix enough
if (perm & R_PERM_W) {
fd = r_sandbox_open (file, O_BINARY | O_RDWR, 0);
if (fd == -1 && perm & R_PERM_CREAT) {
r_sandbox_creat (file, 0644);
fd = r_sandbox_open (file, O_BINARY | O_RDWR | O_CREAT, 0);
}
} else {
fd = r_sandbox_open (file, O_BINARY, 0);
}
#else
const int posixFlags = (perm & R_PERM_W) ? (perm & R_PERM_CREAT)
? (O_RDWR | O_CREAT) : O_RDWR : O_RDONLY;
fd = r_sandbox_open (file, posixFlags, mode);
#endif
return fd;
}
static int _resolve_arch(libgdbr_t *g, char *xml_data) {
char *arch;
// Find architecture
g->target.arch = R_SYS_ARCH_NONE;
if ((arch = strstr (xml_data, "<architecture"))) {
if (!(arch = strchr (arch, '>'))) {
return -1;
}
arch++;
if (r_str_startswith (arch, "i386")) {
g->target.arch = R_SYS_ARCH_X86;
g->target.bits = 32;
arch += 4;
if (r_str_startswith (arch, ":x86-64")) {
g->target.bits = 64;
}
} else if (r_str_startswith (arch, "aarch64")) {
g->target.arch = R_SYS_ARCH_ARM;
g->target.bits = 64;
} else if (r_str_startswith (arch, "arm")) {
g->target.arch = R_SYS_ARCH_ARM;
g->target.bits = 32;
} else if (r_str_startswith (arch, "mips")) {
g->target.arch = R_SYS_ARCH_MIPS;
g->target.bits = 32;
}
// TODO others
} else {
// apple's debugserver on ios9
if (strstr (xml_data, "com.apple.debugserver.arm64")) {
g->target.arch = R_SYS_ARCH_ARM;
g->target.bits = 64;
} else if (strstr (xml_data, "org.gnu.gdb.mips")) {
// openocd mips?
g->target.arch = R_SYS_ARCH_MIPS;
g->target.bits = 32;
} else {
eprintf ("Unknown architecture parsing XML (%s)\n", xml_data);
}
}
return 0;
}
// default open should permit opening
static RIODesc *__open_default(RIO *io, const char *file, int flags, int mode) {
if (r_str_startswith (file, "file://")) {
file += strlen ("file://");
}
if (!r_io_def_mmap_check_default (file)) {
return NULL;
}
RIODesc *iod = r_io_def_mmap_open (io, file, flags, mode);
return iod;
// NTOE: uncomment this line to support loading files in ro as fallback is rw fails
// return iod? iod: r_io_def_mmap_open (io, file, R_IO_READ, mode);
}
static bool r_io_def_mmap_check_default (const char *filename) {
if (filename) {
if (r_str_startswith (filename, "file://")) {
filename += strlen ("file://");
}
const char * peekaboo = (!strncmp (filename, "nocache://", 10))
? NULL : strstr (filename, "://");
if (!peekaboo || (peekaboo-filename) > 10) {
return true;
}
}
return false;
}
static int __io_posix_open(const char *file, int flags, int mode) {
int fd;
if (r_str_startswith (file, "file://")) {
file += strlen ("file://");
}
if (r_file_is_directory (file)) {
return -1;
}
#if __WINDOWS__
if (flags & R_IO_WRITE) {
fd = r_sandbox_open (file, O_BINARY | O_RDWR, 0);
if (fd == -1) {
r_sandbox_creat (file, 0644);
fd = r_sandbox_open (file, O_BINARY | O_RDWR, 0);
}
} else {
fd = r_sandbox_open (file, O_BINARY, 0);
}
#else
fd = r_sandbox_open (file, (flags & R_IO_WRITE) ? (O_RDWR|O_CREAT) : O_RDONLY, mode);
#endif
return fd;
}
ut64 gdbr_get_baddr(libgdbr_t *g) {
if (!g || send_msg (g, "qOffsets") < 0 || read_packet (g) < 0
|| send_ack (g) < 0 || g->data_len == 0) {
return UINT64_MAX;
}
ut64 off, min = UINT64_MAX;
char *ptr;
if (r_str_startswith (g->data, "TextSeg=")) {
ptr = g->data + strlen ("TextSeg=");
if (!isxdigit (*ptr)) {
return min;
}
off = strtoull (ptr, NULL, 16);
if (off < min) {
min = off;
}
if (!(ptr = strchr (ptr, ';'))) {
return min;
}
ptr++;
if (*ptr && r_str_startswith (ptr, "DataSeg=")) {
ptr += strlen ("DataSeg=");
if (!isxdigit (*ptr)) {
return min;
}
off = strtoull (ptr, NULL, 16);
if (off < min) {
min = off;
}
}
return min;
}
if (!r_str_startswith (g->data, "Text=")) {
return min;
}
ptr = g->data + strlen ("Text=");
if (!isxdigit (*ptr)) {
return min;
}
off = strtoull (ptr, NULL, 16);
if (off < min) {
min = off;
}
if (!(ptr = strchr (ptr, ';')) || !r_str_startswith (ptr + 1, "Data=")) {
return UINT64_MAX;
}
ptr += strlen (";Data=");
if (!isxdigit (*ptr)) {
return UINT64_MAX;
}
off = strtoull (ptr, NULL, 16);
if (off < min) {
min = off;
}
if (!(ptr = strchr (ptr, ';'))) {
return min;
}
ptr++;
if (r_str_startswith (ptr, "Bss=")) {
ptr += strlen ("Bss=");
if (!isxdigit (*ptr)) {
return min;
}
off = strtoull (ptr, NULL, 16);
if (off < min) {
min = off;
}
}
return min;
}
static RList* _extract_regs(char *regstr, RList *flags, char *pc_alias) {
char *regstr_end, *regname, *regtype, *tmp1;
ut32 flagnum, regname_len, regsize, regnum;
RList *regs;
RListIter *iter;
gdbr_xml_reg_t *tmpreg;
gdbr_xml_flags_t *tmpflag;
if (!(regs = r_list_new ())) {
return NULL;
}
while ((regstr = strstr (regstr, "<reg"))) {
if (!(regstr_end = strchr (regstr, '/'))) {
goto exit_err;
}
*regstr_end = '\0';
// name
if (!(regname = strstr (regstr, "name="))) {
goto exit_err;
}
regname += 6;
if (!(tmp1 = strchr (regname, '"'))) {
goto exit_err;
}
regname_len = tmp1 - regname;
// size
if (!(tmp1 = strstr (regstr, "bitsize="))) {
goto exit_err;
}
tmp1 += 9;
if (!isdigit (*tmp1)) {
goto exit_err;
}
regsize = strtoul (tmp1, NULL, 10);
// regnum
regnum = UINT32_MAX;
if ((tmp1 = strstr (regstr, "regnum="))) {
tmp1 += 8;
if (!isdigit (*tmp1)) {
goto exit_err;
}
regnum = strtoul (tmp1, NULL, 10);
}
// type
regtype = "gpr";
flagnum = r_list_length (flags);
if ((tmp1 = strstr (regstr, "group="))) {
tmp1 += 7;
if (r_str_startswith (tmp1, "float")) {
regtype = "fpu";
}
// We need type information in r2 register profiles
} else if ((tmp1 = strstr (regstr, "type="))) {
tmp1 += 6;
if (r_str_startswith (tmp1, "vec")
|| r_str_startswith (tmp1, "i387_ext")
|| r_str_startswith (tmp1, "ieee_single")
|| r_str_startswith (tmp1, "ieee_double")) {
regtype = "fpu";
} else if (r_str_startswith (tmp1, "code_ptr")) {
strcpy (pc_alias, "=PC ");
strncpy (pc_alias + 4, regname, regname_len);
strcpy (pc_alias + 4 + regname_len, "\n");
} else {
// Check all flags. If reg is a flag, write flag data
flagnum = 0;
r_list_foreach (flags, iter, tmpflag) {
if (r_str_startswith (tmp1, tmpflag->type)) {
// Max 64-bit :/
if (tmpflag->num_bits <= 64) {
break;
}
}
flagnum++;
}
}
// We need type information in r2 register profiles
}
if (!(tmpreg = calloc (1, sizeof (gdbr_xml_reg_t)))) {
goto exit_err;
}
regname[regname_len] = '\0';
if (regname_len > sizeof (tmpreg->name) - 1) {
eprintf ("Register name too long: %s\n", regname);
}
strncpy (tmpreg->name, regname, sizeof (tmpreg->name) - 1);
tmpreg->name[sizeof (tmpreg->name) - 1] = '\0';
regname[regname_len] = '"';
strncpy (tmpreg->type, regtype, sizeof (tmpreg->type) - 1);
tmpreg->type[sizeof (tmpreg->type) - 1] = '\0';
tmpreg->size = regsize / 8;
tmpreg->flagnum = flagnum;
if (regnum == UINT32_MAX) {
r_list_push (regs, tmpreg);
} else if (regnum >= r_list_length (regs)) {
int i;
for (i = regnum - r_list_length (regs); i > 0; i--) {
// temporary placeholder reg. we trust the xml is correct and this will be replaced.
r_list_push (regs, tmpreg);
r_list_tail (regs)->data = NULL;
}
r_list_push (regs, tmpreg);
} else {
// this is where we replace those placeholder regs
r_list_set_n (regs, regnum, tmpreg);
}
*regstr_end = '/';
regstr = regstr_end + 2;
}
int handle_stop_reason(libgdbr_t *g) {
send_ack (g);
if (g->data_len < 3) {
return -1;
}
switch (g->data[0]) {
case 'O':
unpack_hex (g->data + 1, g->data_len - 1, g->data + 1);
//g->data[g->data_len - 1] = '\0';
eprintf ("%s", g->data + 1);
if (send_ack (g) < 0) {
return -1;
}
return handle_stop_reason (g); // Wait for next stop message
case 'W':
return stop_reason_exit (g);
case 'X':
return stop_reason_terminated (g);
}
if (g->data[0] != 'T') {
return -1;
}
char *ptr1, *ptr2;
g->data[g->data_len] = '\0';
free (g->stop_reason.exec.path);
memset (&g->stop_reason, 0, sizeof (libgdbr_stop_reason_t));
g->stop_reason.core = -1;
if (sscanf (g->data + 1, "%02x", &g->stop_reason.signum) != 1) {
return -1;
}
g->stop_reason.is_valid = true;
g->stop_reason.reason = R_DEBUG_REASON_SIGNAL;
for (ptr1 = strtok (g->data + 3, ";"); ptr1; ptr1 = strtok (NULL, ";")) {
if (r_str_startswith (ptr1, "thread") && !g->stop_reason.thread.present) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (read_thread_id (ptr2, &g->stop_reason.thread.pid,
&g->stop_reason.thread.tid,
g->stub_features.multiprocess) < 0) {
continue;
}
g->stop_reason.thread.present = true;
continue;
}
if (r_str_startswith (ptr1, "core")) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (!isxdigit (*ptr2)) {
continue;
}
g->stop_reason.core = (int) strtol (ptr2, NULL, 16);
continue;
}
if (g->stop_reason.signum == 5) {
if (r_str_startswith (ptr1, "watch")
|| r_str_startswith (ptr1, "rwatch")
|| r_str_startswith (ptr1, "awatch")) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (!isxdigit (*ptr2)) {
continue;
}
g->stop_reason.watchpoint.addr = strtoll (ptr2, NULL, 16);
g->stop_reason.watchpoint.present = true;
continue;
}
if (r_str_startswith (ptr1, "exec") && !g->stop_reason.exec.present) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (!(g->stop_reason.exec.path = calloc (strlen (ptr1) / 2, 1))) {
continue;
}
unpack_hex (ptr2, strlen (ptr2), g->stop_reason.exec.path);
g->stop_reason.exec.present = true;
continue;
}
if (r_str_startswith (ptr1, "fork") && !g->stop_reason.fork.present) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (read_thread_id (ptr2, &g->stop_reason.fork.pid,
&g->stop_reason.fork.tid,
g->stub_features.multiprocess) < 0) {
continue;
}
g->stop_reason.fork.present = true;
continue;
}
if (r_str_startswith (ptr1, "vfork") && !g->stop_reason.vfork.present) {
if (!(ptr2 = strchr (ptr1, ':'))) {
continue;
}
ptr2++;
if (read_thread_id (ptr2, &g->stop_reason.vfork.pid,
&g->stop_reason.vfork.tid,
g->stub_features.multiprocess) < 0) {
continue;
}
g->stop_reason.vfork.present = true;
continue;
}
if (r_str_startswith (ptr1, "vforkdone")) {
g->stop_reason.vforkdone = true;
continue;
}
if (r_str_startswith (ptr1, "library")) {
g->stop_reason.library = true;
continue;
}
if (r_str_startswith (ptr1, "swbreak")) {
g->stop_reason.swbreak = true;
continue;
}
if (r_str_startswith (ptr1, "hwbreak")) {
g->stop_reason.hwbreak = true;
continue;
}
if (r_str_startswith (ptr1, "create")) {
g->stop_reason.create = true;
continue;
}
}
}
if (g->stop_reason.signum == 5) {
g->stop_reason.reason = R_DEBUG_REASON_BREAKPOINT;
}
return 0;
}
R_API char *r_type_get_struct_memb(Sdb *TDB, const char *type, int offset) {
int i, prev_typesize, typesize = 0;
char *res = NULL;
if (offset < 0) {
return NULL;
}
char* query = sdb_fmt ("struct.%s", type);
char *members = sdb_get (TDB, query, 0);
if (!members) {
//eprintf ("%s is not a struct\n", type);
return NULL;
}
int nargs = r_str_split (members, ',');
for (i = 0; i < nargs ; i++) {
const char *name = r_str_word_get0 (members, i);
if (!name) {
break;
}
query = sdb_fmt ("struct.%s.%s", type, name);
char *subtype = sdb_get (TDB, query, 0);
if (!subtype) {
break;
}
int len = r_str_split (subtype, ',');
if (len < 3) {
free (subtype);
break;
}
int val = r_num_math (NULL, r_str_word_get0 (subtype, len - 1));
int arrsz = val ? val : 1;
if ((typesize / 8) == offset) {
res = r_str_newf ("%s.%s", type, name);
free (subtype);
break;
}
prev_typesize = typesize;
typesize += r_type_get_bitsize (TDB, subtype) * arrsz;
// Handle nested structs
if (offset < (typesize / 8)) {
char *nested_type = (char *)r_str_word_get0 (subtype, 0);
if (r_str_startswith (nested_type, "struct ") && !r_str_endswith (nested_type, " *")) {
len = r_str_split (nested_type, ' ');
if (len < 2) {
free (subtype);
break;
}
nested_type = (char *)r_str_word_get0 (nested_type, 1);
char *nested_res = r_type_get_struct_memb (TDB, nested_type, offset - (prev_typesize / 8));
if (nested_res) {
len = r_str_split(nested_res, '.');
res = r_str_newf ("%s.%s.%s", type, name, r_str_word_get0 (nested_res, len - 1));
free (nested_res);
free (subtype);
break;
}
}
}
free (subtype);
}
free (members);
return res;
}
int gdbr_server_serve(libgdbr_t *g, gdbr_server_cmd_cb cmd_cb, void *core_ptr) {
int ret;
if (!g) {
return -1;
}
while (1) {
read_packet (g);
if (g->data_len == 0) {
continue;
}
if (r_str_startswith (g->data, "k")) {
return _server_handle_k (g, cmd_cb, core_ptr);
}
if (r_str_startswith (g->data, "vKill")) {
return _server_handle_vKill (g, cmd_cb, core_ptr);
}
if (r_str_startswith (g->data, "qSupported")) {
if ((ret = _server_handle_qSupported (g)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qTStatus")) {
if ((ret = _server_handle_qTStatus (g)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qC") && g->data_len == 2) {
if ((ret = _server_handle_qC (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qAttached")) {
if ((ret = _server_handle_qAttached (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "vMustReplyEmpty")) {
if ((ret = _server_handle_vMustReplyEmpty (g)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qTfV")) {
if ((ret = _server_handle_qTfV (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qfThreadInfo")) {
if ((ret = _server_handle_qfThreadInfo (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qsThreadInfo")) {
if ((ret = _server_handle_qsThreadInfo (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "Hg")) {
if ((ret = _server_handle_Hg (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "Hc")) {
if ((ret = _server_handle_Hc (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "?")) {
if ((ret = _server_handle_ques (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "g") && g->data_len == 1) {
if ((ret = _server_handle_g (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "vCont")) {
if ((ret = _server_handle_vCont (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "qOffsets")) {
if ((ret = _server_handle_qOffsets (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (g->data[0] == 'z' || g->data[0] == 'Z') {
if ((ret = _server_handle_z (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (g->data[0] == 's') {
if ((ret = _server_handle_s (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (g->data[0] == 'c') {
if ((ret = _server_handle_c (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "m")) {
if ((ret = _server_handle_m (g, cmd_cb, core_ptr)) < 0) {
return ret;
}
continue;
}
if (r_str_startswith (g->data, "QStartNoAckMode")) {
if (send_ack (g) < 0 || send_msg (g, "OK") < 0) {
return -1;
}
g->no_ack = true;
continue;
}
// Unrecognized packet
if (send_ack (g) < 0 || send_msg (g, "") < 0) {
g->data[g->data_len] = '\0';
eprintf ("Unknown packet: %s\n", g->data);
return -1;
}
};
return ret;
}
