static void command_set_signal_mask(char * token, Channel * c) {
int err = 0;
char id[256];
pid_t pid;
Context * ctx = NULL;
int dont_stop;
int dont_pass;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
dont_stop = json_read_long(&c->inp);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
dont_pass = json_read_long(&c->inp);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, NULL);
ctx = context_find_from_pid(pid);
if (ctx == NULL) {
err = ERR_INV_CONTEXT;
}
else {
ctx->sig_dont_stop = dont_stop;
ctx->sig_dont_pass = dont_pass;
}
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
write_stream(&c->out, MARKER_EOM);
}
static void command_get_context(char * token, Channel * c) {
int err = 0;
char id[256];
Context * ctx = NULL;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
ctx = id2ctx(id);
if (ctx == NULL) err = ERR_INV_CONTEXT;
else if (ctx->exited) err = ERR_ALREADY_EXITED;
if (err) {
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
write_stringz(&c->out, "null");
write_stream(&c->out, MARKER_EOM);
}
else {
/* Need to stop everything to access context properties.
* In particular, proc FS access can fail when process is running.
*/
GetContextArgs * s = loc_alloc_zero(sizeof(GetContextArgs));
s->c = c;
stream_lock(c);
strcpy(s->token, token);
s->ctx = ctx;
context_lock(ctx);
id2pid(id, &s->parent);
post_safe_event(ctx->mem, event_get_context, s);
}
}
static void command_signal(char * token, Channel * c) {
int err = 0;
char id[256];
int signal = 0;
pid_t pid, parent;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
signal = (int)json_read_long(&c->inp);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, &parent);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
#if defined(WIN32)
err = ENOSYS;
#elif defined(_WRS_KERNEL)
if (kill(pid, signal) < 0) err = errno;
#elif defined(__APPLE__)
if (kill(pid, signal) < 0) err = errno;
#else
if (parent == 0) {
if (kill(pid, signal) < 0) err = errno;
}
else {
if (tkill(pid, signal) < 0) err = errno;
}
#endif
write_errno(&c->out, err);
write_stream(&c->out, MARKER_EOM);
}
static void command_terminate(char * token, Channel * c) {
int err = 0;
char id[256];
pid_t pid, parent;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, &parent);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
if (parent != 0) {
err = ERR_INV_CONTEXT;
}
else {
#if defined(WIN32)
HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
if (h == NULL) {
err = ERR_INV_CONTEXT;
}
else {
TerminateProcess(h, 1);
CloseHandle(h);
}
#else
if (kill(pid, SIGTERM) < 0) err = errno;
#endif
}
write_errno(&c->out, err);
write_stream(&c->out, MARKER_EOM);
}
static void command_attach(char * token, Channel * c) {
int err = 0;
char id[256];
pid_t pid, parent;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, &parent);
if (parent != 0) {
err = ERR_INV_CONTEXT;
}
else if (context_find_from_pid(pid) != NULL) {
err = ERR_ALREADY_ATTACHED;
}
else {
AttachDoneArgs * data = loc_alloc_zero(sizeof *data);
data->c = c;
strcpy(data->token, token);
if (context_attach(pid, attach_done, data, 0) == 0) {
stream_lock(c);
return;
}
err = errno;
loc_free(data);
}
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
write_stream(&c->out, MARKER_EOM);
}
static void command_get_signal_list(char * token, Channel * c) {
int err = 0;
char id[256];
pid_t pid;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, NULL);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
/* pid is ignored, same signal list for all */
write_errno(&c->out, err);
if (err) {
write_stringz(&c->out, "null");
}
else {
int i = 0;
int n = 0;
write_stream(&c->out, '[');
for (i = 0; i < 32; i++) {
char * name = signal_name(i);
char * desc = signal_description(i);
if (name != NULL || desc != NULL) {
if (n > 0) write_stream(&c->out, ',');
write_stream(&c->out, '{');
json_write_string(&c->out, "Index");
write_stream(&c->out, ':');
json_write_long(&c->out, i);
if (name != NULL) {
write_stream(&c->out, ',');
json_write_string(&c->out, "Name");
write_stream(&c->out, ':');
json_write_string(&c->out, name);
}
if (desc != NULL) {
write_stream(&c->out, ',');
json_write_string(&c->out, "Description");
write_stream(&c->out, ':');
json_write_string(&c->out, desc);
}
write_stream(&c->out, ',');
json_write_string(&c->out, "Code");
write_stream(&c->out, ':');
json_write_ulong(&c->out, signal_code(i));
write_stream(&c->out, '}');
n++;
}
}
write_stream(&c->out, ']');
write_stream(&c->out, 0);
}
write_stream(&c->out, MARKER_EOM);
}
static void command_get_context(char * token, Channel * c) {
int err = 0;
char id[256];
pid_t pid, parent;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
pid = id2pid(id, &parent);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
pid = id2pid(id, &parent);
if (pid != 0 && parent == 0) {
#if defined(WIN32)
#elif defined(_WRS_KERNEL)
if (TASK_ID_VERIFY(pid) == ERROR) err = ERR_INV_CONTEXT;
#elif defined(__APPLE__)
#else
struct stat st;
char dir[FILE_PATH_SIZE];
snprintf(dir, sizeof(dir), "/proc/%d", pid);
if (lstat(dir, &st) < 0) err = errno;
else if (!S_ISDIR(st.st_mode)) err = ERR_INV_CONTEXT;
#endif
}
write_errno(&c->out, err);
if (err == 0 && pid != 0 && parent == 0) {
write_context(&c->out, pid);
write_stream(&c->out, 0);
}
else {
write_stringz(&c->out, "null");
}
write_stream(&c->out, MARKER_EOM);
}
int cpu_bp_on_suspend(Context * ctx, int * triggered) {
unsigned cb_cnt = 0;
ContextExtensionARM * ext = EXT(ctx);
ContextExtensionARM * bps = EXT(context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT));
if (ctx->exiting) return 0;
if (bps->bp_cnt > 0 || bps->wp_cnt > 0) {
int i;
ContextAddress pc = 0;
if (read_reg(ctx, pc_def, pc_def->size, &pc) < 0) return -1;
if (ext->skip_wp_addr != pc) ext->skip_wp_set = 0;
if (bps->bp_cnt > 0) {
for (i = 0; i < bps->bp_cnt; i++) {
ContextBreakpoint * cb = bps->hw_bps[i];
if (cb != NULL && ((uint32_t)cb->address & ~0x1) == pc && (ext->armed & (1u << i))) {
ext->triggered_hw_bps[cb_cnt++] = cb;
}
}
}
if (bps->wp_cnt > 0) {
siginfo_t siginfo;
pid_t pid = id2pid(ctx->id, NULL);
if (ptrace(PTRACE_GETSIGINFO, pid, 0, &siginfo) < 0) return -1;
if (siginfo.si_signo == SIGTRAP && (siginfo.si_code & 0xffff) == 0x0004 && siginfo.si_errno < 0) {
/* Watchpoint */
for (i = bps->bp_cnt; i < bps->bp_cnt + bps->wp_cnt; i++) {
ContextBreakpoint * cb = bps->hw_bps[i];
if (cb != NULL && (ext->armed & (1u << i))) {
if (bps->wp_cnt > 1) {
ContextAddress addr = (ContextAddress)siginfo.si_addr;
if (addr < cb->address || addr >= cb->address + cb->length) continue;
}
ext->triggered_hw_bps[cb_cnt++] = cb;
ext->skip_wp_set |= 1u << i;
ext->skip_wp_addr = pc;
}
}
}
}
if (cb_cnt > 0) {
ctx->stopped_by_cb = ext->triggered_hw_bps;
ctx->stopped_by_cb[cb_cnt] = NULL;
}
}
*triggered = cb_cnt > 0;
return 0;
}
static void command_get_children(char * token, Channel * c) {
char id[256];
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, 0);
write_stream(&c->out, '[');
if (id[0] == 0) {
LINK * qp;
int cnt = 0;
for (qp = context_root.next; qp != &context_root; qp = qp->next) {
Context * ctx = ctxl2ctxp(qp);
if (ctx->exited) continue;
if (ctx->parent != NULL) continue;
if (cnt > 0) write_stream(&c->out, ',');
json_write_string(&c->out, container_id(ctx));
cnt++;
}
}
else if (id[0] == 'P') {
LINK * qp;
int cnt = 0;
pid_t ppd = 0;
Context * parent = id2ctx(id);
id2pid(id, &ppd);
if (parent != NULL && parent->parent == NULL && ppd == 0) {
if (!parent->exited && context_has_state(parent)) {
if (cnt > 0) write_stream(&c->out, ',');
json_write_string(&c->out, thread_id(parent));
cnt++;
}
for (qp = parent->children.next; qp != &parent->children; qp = qp->next) {
Context * ctx = cldl2ctxp(qp);
assert(!ctx->exited);
assert(ctx->parent == parent);
if (cnt > 0) write_stream(&c->out, ',');
json_write_string(&c->out,thread_id(ctx));
cnt++;
}
}
}
write_stream(&c->out, ']');
write_stream(&c->out, 0);
write_stream(&c->out, MARKER_EOM);
}
static int get_bp_info(Context * ctx) {
uint32_t buf = 0;
ContextExtensionARM * bps = EXT(ctx);
if (bps->info_ok) return 0;
if (ptrace(PTRACE_GETHBPREGS, id2pid(ctx->id, NULL), 0, &buf) < 0) {
/* Kernel does not support hardware breakpoints */
bps->arch = 0;
bps->wp_size = 0;
bps->wp_cnt = 0;
bps->bp_cnt = 0;
bps->info_ok = 1;
return 0;
}
bps->arch = (uint8_t)(buf >> 24);
bps->wp_size = (uint8_t)(buf >> 16);
bps->wp_cnt = (uint8_t)(buf >> 8);
bps->bp_cnt = (uint8_t)buf;
if (bps->wp_cnt > MAX_HWP) bps->wp_cnt = MAX_HWP;
if (bps->bp_cnt > MAX_HBP) bps->bp_cnt = MAX_HBP;
bps->info_ok = 1;
return 0;
}
static int set_debug_regs(Context * ctx, int * step_over_hw_bp) {
int i, j;
ContextAddress pc = 0;
Context * grp = context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT);
ContextExtensionARM * ext = EXT(ctx);
ContextExtensionARM * bps = EXT(grp);
pid_t pid = id2pid(ctx->id, NULL);
assert(bps->info_ok);
ext->armed = 0;
*step_over_hw_bp = 0;
if (read_reg(ctx, pc_def, pc_def->size, &pc) < 0) return -1;
for (i = 0; i < bps->bp_cnt + bps->wp_cnt; i++) {
uint32_t cr = 0;
ContextBreakpoint * cb = bps->hw_bps[i];
if (i == 0 && ext->hw_stepping) {
uint32_t vr = 0;
if (ext->hw_stepping == 1) {
vr = (uint32_t)ext->step_addr & ~0x1;
cr |= 0x3 << 5;
}
else {
vr = (uint32_t)pc;
cr |= 0x1 << 22;
cr |= 0xf << 5;
}
cr |= 0x7u;
if (ptrace(PTRACE_SETHBPREGS, pid, 1, &vr) < 0) return -1;
}
else if (cb != NULL) {
if (i < bps->bp_cnt && ((uint32_t)cb->address & ~0x1) == pc) {
/* Skipping the breakpoint */
*step_over_hw_bp = 1;
}
else if (bps->arch >= ARM_DEBUG_ARCH_V7_ECP14 && (ext->skip_wp_set & (1u << i))) {
/* Skipping the watchpoint */
assert(i >= bps->bp_cnt);
*step_over_hw_bp = 1;
}
else {
uint32_t vr = (uint32_t)cb->address & ~0x1;
if (i < bps->bp_cnt) {
cr |= 0x3 << 5;
}
else {
vr = (uint32_t)cb->address & ~0x3;
for (j = 0; j < 4; j++) {
if (vr + j < cb->address) continue;
if (vr + j >= cb->address + cb->length) continue;
cr |= 1 << (5 + j);
}
if (cb->access_types & CTX_BP_ACCESS_DATA_READ) cr |= 1 << 3;
if (cb->access_types & CTX_BP_ACCESS_DATA_WRITE) cr |= 1 << 4;
}
cr |= 0x7;
if (i < bps->bp_cnt) {
if (ptrace(PTRACE_SETHBPREGS, pid, i * 2 + 1, &vr) < 0) return -1;
}
else {
if (ptrace(PTRACE_SETHBPREGS, pid, -(i * 2 + 1), &vr) < 0) return -1;
}
ext->armed |= 1 << i;
}
}
if (cr == 0) {
/* Linux kernel does not allow 0 as Control Register value */
cr |= 0x3u << 1;
cr |= 0xfu << 5;
if (i >= bps->bp_cnt) {
cr |= 1u << 4;
}
}
if (i < bps->bp_cnt) {
if (ptrace(PTRACE_SETHBPREGS, pid, i * 2 + 2, &cr) < 0) return -1;
}
else {
if (ptrace(PTRACE_SETHBPREGS, pid, -(i * 2 + 2), &cr) < 0) return -1;
}
}
ext->hw_bps_regs_generation = bps->hw_bps_generation;
return 0;
}