+int
+open_binary(char *filename, int mode)
+{
+#ifdef LISP_FEATURE_WIN32
+ mode |= O_BINARY;
+#endif
+
+ return open(filename, mode);
+}
+
+
+static struct runtime_options *
+read_runtime_options(int fd)
+{
+ size_t optarray[RUNTIME_OPTIONS_WORDS];
+ struct runtime_options *options = NULL;
+
+ if (read(fd, optarray, RUNTIME_OPTIONS_WORDS * sizeof(size_t)) !=
+ RUNTIME_OPTIONS_WORDS * sizeof(size_t)) {
+ return NULL;
+ }
+
+ if ((RUNTIME_OPTIONS_MAGIC != optarray[0]) || (0 == optarray[1])) {
+ return NULL;
+ }
+
+ options = successful_malloc(sizeof(struct runtime_options));
+
+ options->dynamic_space_size = optarray[2];
+ options->thread_control_stack_size = optarray[3];
+
+ return options;
+}
+
+void
+maybe_initialize_runtime_options(int fd)
+{
+ struct runtime_options *new_runtime_options;
+ off_t end_offset = sizeof(lispobj) +
+ sizeof(os_vm_offset_t) +
+ (RUNTIME_OPTIONS_WORDS * sizeof(size_t));
+
+ lseek(fd, -end_offset, SEEK_END);
+
+ if (new_runtime_options = read_runtime_options(fd)) {
+ runtime_options = new_runtime_options;
+ }
+}
+
+/* Search 'filename' for an embedded core. An SBCL core has, at the
+ * end of the file, a trailer containing optional saved runtime
+ * options, the start of the core (an os_vm_offset_t), and a final
+ * signature word (the lispobj CORE_MAGIC). If this trailer is found
+ * at the end of the file, the start of the core can be determined
+ * from the core size.
+ *
+ * If an embedded core is present, this returns the offset into the
+ * file to load the core from, or -1 if no core is present. */
+os_vm_offset_t
+search_for_embedded_core(char *filename)
+{
+ lispobj header;
+ os_vm_offset_t lispobj_size = sizeof(lispobj);
+ os_vm_offset_t trailer_size = lispobj_size + sizeof(os_vm_offset_t);
+ os_vm_offset_t core_start, pos;
+ int fd = -1;
+
+ if ((fd = open_binary(filename, O_RDONLY)) < 0)
+ goto lose;
+ if (lseek(fd, -lispobj_size, SEEK_END) < 0)
+ goto lose;
+ if (read(fd, &header, (size_t)lispobj_size) < lispobj_size)
+ goto lose;
+
+ if (header == CORE_MAGIC) {
+ if (lseek(fd, -trailer_size, SEEK_END) < 0)
+ goto lose;
+ if (read(fd, &core_start, sizeof(os_vm_offset_t)) < 0)
+ goto lose;
+
+ if (lseek(fd, core_start, SEEK_SET) < 0)
+ goto lose;
+ pos = lseek(fd, 0, SEEK_CUR);
+
+ if (read(fd, &header, (size_t)lispobj_size) < lispobj_size)
+ goto lose;
+
+ if (header != CORE_MAGIC)
+ goto lose;
+
+ maybe_initialize_runtime_options(fd);
+
+ close(fd);
+ return pos;
+ }
+
+lose:
+ if (fd != -1)
+ close(fd);
+
+ return -1;
+}
+
+/* If more platforms doesn't support overlapping mmap rename this
+ * def to something like ifdef nommapoverlap */
+/* currently hpux only */
+#ifdef LISP_FEATURE_HPUX
+os_vm_address_t copy_core_bytes(int fd, os_vm_offset_t offset,
+ os_vm_address_t addr, int len)
+{
+ unsigned char buf[4096];
+ int c,x;
+ int old_fd = lseek(fd, 0, SEEK_CUR);
+
+ if(len & (4096-1)){
+ fprintf(stderr, "cant copy a slice of core because slice-length is not of page size(4096)\n");
+ exit(-1);
+ }
+ if(old_fd < 0){
+ fprintf(stderr, "cant perform lseek() on corefile\n");
+ }
+ lseek(fd, offset, SEEK_SET);
+ if(fd < 0){
+ fprintf(stderr, "cant perform lseek(%u,%lu,SEEK_SET) on corefile\n", fd, offset);
+ }
+ for(x = 0; x < len; x += 4096){
+ c = read(fd, buf, 4096);
+ if(c != 4096){
+ fprintf(stderr, "cant read memory area from corefile at position %lu, got %d\n", offset + x, c);
+ exit(-1);
+ }
+ memcpy(addr+x, buf, 4096);
+ }
+ os_flush_icache(addr, len);
+ return addr;
+}
+#endif
+