int context_read_mem(Context * ctx, ContextAddress address, void * buf, size_t size) {
ContextAddress word_addr;
unsigned word_size = context_word_size(ctx);
assert(is_dispatch_thread());
assert(!ctx->exited);
trace(LOG_CONTEXT, "context: read memory ctx %#lx, id %s, address %#lx, size %zu",
ctx, ctx->id, address, size);
assert(word_size <= sizeof(unsigned long));
for (word_addr = address & ~((ContextAddress)word_size - 1); word_addr < address + size; word_addr += word_size) {
unsigned long word = 0;
errno = 0;
word = ptrace(PTRACE_PEEKDATA, EXT(ctx)->pid, (char *)word_addr, 0);
if (errno != 0) {
int err = errno;
trace(LOG_CONTEXT, "error: ptrace(PTRACE_PEEKDATA, ...) failed: ctx %#lx, id %s, addr %#lx, error %d %s",
ctx, ctx->id, word_addr, err, errno_to_str(err));
errno = err;
return -1;
}
if (word_addr < address || word_addr + word_size > address + size) {
size_t i;
for (i = 0; i < word_size; i++) {
if (word_addr + i >= address && word_addr + i < address + size) {
((char *)buf)[word_addr + i - address] = ((char *)&word)[i];
}
}
}
else {
memcpy((char *)buf + (word_addr - address), &word, word_size);
}
}
return check_breakpoints_on_memory_read(ctx, address, buf, size);
}
static void write_context(OutputStream * out, Context * ctx) {
assert(!ctx->exited);
write_stream(out, '{');
json_write_string(out, "ID");
write_stream(out, ':');
json_write_string(out, ctx->id);
if (ctx->parent != NULL) {
write_stream(out, ',');
json_write_string(out, "ParentID");
write_stream(out, ':');
json_write_string(out, ctx->parent->id);
}
write_stream(out, ',');
json_write_string(out, "ProcessID");
write_stream(out, ':');
json_write_string(out, context_get_group(ctx, CONTEXT_GROUP_PROCESS)->id);
if (ctx->name != NULL) {
write_stream(out, ',');
json_write_string(out, "Name");
write_stream(out, ':');
json_write_string(out, ctx->name);
}
write_stream(out, ',');
json_write_string(out, "BigEndian");
write_stream(out, ':');
json_write_boolean(out, ctx->big_endian);
if (ctx->mem_access) {
int cnt = 0;
write_stream(out, ',');
json_write_string(out, "AddressSize");
write_stream(out, ':');
json_write_ulong(out, context_word_size(ctx));
write_stream(out, ',');
json_write_string(out, "AccessTypes");
write_stream(out, ':');
write_stream(out, '[');
if (ctx->mem_access & MEM_ACCESS_INSTRUCTION) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "instruction");
}
if (ctx->mem_access & MEM_ACCESS_DATA) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "data");
}
if (ctx->mem_access & MEM_ACCESS_IO) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "io");
}
if (ctx->mem_access & MEM_ACCESS_USER) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "user");
}
if (ctx->mem_access & MEM_ACCESS_SUPERVISOR) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "supervisor");
}
if (ctx->mem_access & MEM_ACCESS_HYPERVISOR) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "hypervisor");
}
if (ctx->mem_access & MEM_ACCESS_VIRTUAL) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "virtual");
}
if (ctx->mem_access & MEM_ACCESS_PHYSICAL) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "physical");
}
if (ctx->mem_access & MEM_ACCESS_CACHE) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "cache");
}
if (ctx->mem_access & MEM_ACCESS_TLB) {
if (cnt++) write_stream(out, ',');
json_write_string(out, "tlb");
}
write_stream(out, ']');
}
write_stream(out, '}');
}
