static int ndless_load(const char *docpath, NUC_FILE *docfile, void **base, int (**entry_address_ptr)(int, char*[]))
{
struct nuc_stat docstat;
if (nuc_stat(docpath, &docstat)) {
puts("ndless_load: can't open doc");
return 1;
}
void *docptr;
if(emu_debug_alloc_ptr)
{
if(emu_debug_alloc_size < docstat.st_size)
{
puts("ndless_load: emu_debug_alloc_size too small!");
docptr = malloc(docstat.st_size);
}
else
docptr = emu_debug_alloc_ptr;
}
else
docptr = malloc(docstat.st_size);
if (!docptr) {
puts("ndless_load: can't malloc");
return 1;
}
if (!nuc_fread(docptr, docstat.st_size, 1, docfile)) {
puts("ndless_load: can't read doc");
if (!emu_debug_alloc_ptr)
free(docptr);
return 1;
}
uint32_t *ptr32 = docptr, *ptr32_end = ptr32 + ((docstat.st_size / 4) < 512 ? (docstat.st_size / 4) : 512);
while(ptr32 < ptr32_end)
{
// Found an embedded Zehn file
if(*ptr32 == 0x6e68655a && *(ptr32 + 1) == 1)
{
nuc_fseek(docfile, (uint8_t*)(ptr32) - (uint8_t*)(docptr), SEEK_SET);
int ret = zehn_load(docfile, base, entry_address_ptr);
switch(ret)
{
case 0: // Execute as Zehn
case 2: // Valid Zehn, but don't execute
if(!emu_debug_alloc_ptr)
free(docptr);
return ret;
case 1: // Invalid Zehn
break;
}
}
ptr32++;
}
*base = docptr;
*entry_address_ptr = (int (*)(int argc, char *argv[]))(docptr + sizeof(PRGMSIG));
return 0;
}
extern "C" int zehn_load(NUC_FILE *file, void **mem_ptr, int (**entry)(int,char*[]), bool *supports_hww)
{
Zehn_header header;
// The Zehn file may not begin at the file start
size_t file_start = nuc_ftell(file);
if(nuc_fread(&header, sizeof(header), 1, file) != 1)
return 1;
if(header.signature != ZEHN_SIGNATURE || header.version != ZEHN_VERSION || header.file_size > header.alloc_size)
{
puts("[Zehn] This Zehn file is not supported!");
return 1;
}
Storage<Zehn_reloc> relocs(header.reloc_count);
Storage<Zehn_flag> flags(header.flag_count);
Storage<uint8_t> extra_data(header.extra_size);
if(nuc_fread(reinterpret_cast<void*>(relocs.data), sizeof(Zehn_reloc), header.reloc_count, file) != header.reloc_count
|| nuc_fread(reinterpret_cast<void*>(flags.data), sizeof(Zehn_flag), header.flag_count, file) != header.flag_count
|| nuc_fread(reinterpret_cast<void*>(extra_data.data), 1, header.extra_size, file) != header.extra_size)
{
puts("[Zehn] File read failed!");
return 1;
}
size_t remaining_mem = header.alloc_size - nuc_ftell(file) + file_start, remaining_file = header.file_size - nuc_ftell(file) + file_start;
if(emu_debug_alloc_ptr)
{
if(emu_debug_alloc_size < remaining_mem)
{
puts("[Zehn] emu_debug_alloc_size too small!");
*mem_ptr = malloc(remaining_mem);
}
else
*mem_ptr = emu_debug_alloc_ptr;
}
else
*mem_ptr = malloc(remaining_mem);
uint8_t *base = reinterpret_cast<uint8_t*>(*mem_ptr);
if(!base)
{
puts("[Zehn] Memory allocation failed!");
return 1;
}
if(relocs.data[0].type == Zehn_reloc_type::FILE_COMPRESSED)
{
if(relocs.data[0].offset != static_cast<int>(Zehn_compress_type::ZLIB))
{
puts("[Zehn] Compression format not supported!");
return 1;
}
Storage<uint8_t> compressed(remaining_file);
if(nuc_fread(compressed.data, remaining_file, 1, file) != 1)
{
puts("[Zehn] File read failed!");
return 1;
}
uLongf dest_len = remaining_mem;
if(uncompress(base, &dest_len, compressed.data, remaining_file) != Z_OK)
{
puts("[Zehn] Decompression failed!");
return 1;
}
std::fill(base + dest_len, base + remaining_mem, 0);
}
else
{
if(nuc_fread(base, remaining_file, 1, file) != 1)
{
puts("[Zehn] File read failed!");
return 1;
}
// Fill rest with zeros (.bss and other NOBITS sections)
std::fill(base + remaining_file, base + remaining_mem, 0);
}
const char *application_name = "(unknown)", *application_author = "(unknown)", *application_notice = "(no notice)";
unsigned int application_version = 1, ndless_version_min = 0, ndless_version_max = UINT_MAX,
ndless_revision_min = 0, ndless_revision_max = UINT_MAX;
// Iterate through each flag
for(Zehn_flag &f : flags)
{
const char *ptr;
switch(f.type)
{
case Zehn_flag_type::EXECUTABLE_NAME:
if(!zehn_check_string(extra_data.begin(), f, 255, &application_name))
{
puts("[Zehn] Invalid application name!");
return 1;
}
break;
case Zehn_flag_type::EXECUTABLE_NOTICE:
if(zehn_check_string(extra_data.begin(), f, 1024, &ptr))
application_notice = ptr;
break;
case Zehn_flag_type::EXECUTABLE_AUTHOR:
if(zehn_check_string(extra_data.begin(), f, 128, &ptr))
application_author = ptr;
break;
case Zehn_flag_type::EXECUTABLE_VERSION:
application_version = f.data;
break;
case Zehn_flag_type::NDLESS_VERSION_MIN:
ndless_version_min = f.data;
break;
case Zehn_flag_type::NDLESS_REVISION_MIN:
ndless_revision_min = f.data;
break;
case Zehn_flag_type::NDLESS_VERSION_MAX:
ndless_version_max = f.data;
break;
case Zehn_flag_type::NDLESS_REVISION_MAX:
ndless_revision_max = f.data;
break;
case Zehn_flag_type::RUNS_ON_COLOR:
if(f.data == false && has_colors)
{
msgbox("Error", "The application %s doesn't support CX and CM calculators!", application_name);
return 2;
}
break;
case Zehn_flag_type::RUNS_ON_CLICKPAD:
if(f.data == false && !is_touchpad)
{
msgbox("Error", "The application %s doesn't support clickpads!", application_name);
return 2;
}
break;
case Zehn_flag_type::RUNS_ON_TOUCHPAD:
if(f.data == false && is_touchpad)
{
msgbox("Error", "The application %s doesn't support touchpads!", application_name);
return 2;
}
break;
case Zehn_flag_type::RUNS_ON_32MB:
if(f.data == false && (!has_colors || is_cm))
{
msgbox("Error", "The application %s requires more than 32MB of RAM!", application_name);
return 2;
}
break;
case Zehn_flag_type::RUNS_ON_HWW:
*supports_hww = f.data;
break;
default:
break;
}
}
// Show some information about the executable
if(isKeyPressed(KEY_NSPIRE_CAT))
{
char info[1536];
sprintf(info, "Name: %s Version: %u\nAuthor: %s\nNotice: %s", application_name, application_version, application_author, application_notice);
show_msgbox("Information about the executable", info);
return 2;
}
if(NDLESS_VERSION < ndless_version_min || (NDLESS_VERSION == ndless_version_min && NDLESS_REVISION < ndless_revision_min))
{
msgbox("Error", "The application %s requires at least ndless %d.%d.%d!", application_name, ndless_version_min / 10, ndless_version_min % 10, ndless_revision_min);
return 2;
}
if(NDLESS_VERSION > ndless_version_max || (NDLESS_VERSION == ndless_version_max && NDLESS_REVISION > ndless_revision_max))
{
if(ndless_revision_max != UINT_MAX)
msgbox("Error", "The application %s requires ndless %d.%d.%d or older!", application_name, ndless_version_max / 10, ndless_version_max % 10, ndless_revision_max);
else
msgbox("Error", "The application %s requires ndless %d.%d or older!", application_name, ndless_version_max / 10, ndless_version_max % 10);
return 2;
}
// Iterate through the reloc table
for(Zehn_reloc &r : relocs)
{
if(r.offset >= remaining_mem)
{
puts("[Zehn] Wrong reloc in Zehn file!");
return 1;
}
// No alignment guaranteed!
uint32_t *place = reinterpret_cast<uint32_t*>(base + r.offset);
switch(r.type)
{
//Handled above
case Zehn_reloc_type::FILE_COMPRESSED:
break;
case Zehn_reloc_type::UNALIGNED_RELOC:
if(r.offset != 0)
{
printf("[Zehn] Unexpected UNALIGNED_RELOC value %lu!\n", r.offset);
return 1;
}
break;
case Zehn_reloc_type::ADD_BASE:
wu32(place, ru32(place) + reinterpret_cast<uint32_t>(base));
break;
case Zehn_reloc_type::ADD_BASE_GOT:
{
uint32_t u32;
while((u32 = ru32(place)) != 0xFFFFFFFF)
wu32(place++, u32 + reinterpret_cast<uint32_t>(base));
break;
}
case Zehn_reloc_type::SET_ZERO:
wu32(place, 0);
break;
default:
printf("[Zehn] Unsupported reloc %d!\n", static_cast<int>(r.type));
return 1;
}
}
*entry = reinterpret_cast<int (*)(int,char*[])>(base + header.entry_offset);
return 0;
}
// Run a program. Returns 0xDEAD if can't run it or 0xBEEF if the error dialog should be skipped. Else returns the program return code.
// If resident_ptr isn't NULL, the program's memory block isn't freed and is stored in resident_ptr. It may be freed later with ld_free().
// Resident program shouldn't use argv after returning.
// argsn/args don't include the program path. args doesn't need to be NULL terminated. Can be 0/NULL.
int ld_exec_with_args(const char *path, int argsn, char *args[], void **resident_ptr) {
char prgm_path[FILENAME_MAX];
char doc_path[FILENAME_MAX]; // non const
unsigned i;
char **argv = NULL;
char **argvptr;
int argc;
int ret;
BOOL isassoc = FALSE;
strcpy(doc_path, path);
strcpy(prgm_path, path); // may deffer if using file association
// File association
char extbuf[FILENAME_MAX];
strcpy(extbuf, prgm_path);
char *ext = strrchr(extbuf, '.');
if (!ext || ext == extbuf) {
puts("ld_exec: can't find file extension");
return 0xDEAD; // shouldn't happen, all files have a .tns extension
}
*ext = '\0'; // keep the extension before .tns
ext = strrchr(extbuf, '.');
unsigned pathlen = strlen(extbuf);
// without '.'
#define MAX_EXT_LEN 8
if (ext && extbuf + pathlen - ext <= (MAX_EXT_LEN+1) && extbuf + pathlen - ext > 1) { // looks like an extension
cfg_open();
char ext_key[4 + MAX_EXT_LEN + 1]; // ext.extension
strcpy(ext_key, "ext");
strcat(ext_key, ext);
char *prgm_name_noext = cfg_get(ext_key);
if (prgm_name_noext) {
char prgm_name[FILENAME_MAX + 4];
strcpy(prgm_name, prgm_name_noext);
strcat(prgm_name, ".tns");
struct assoc_file_each_cb_ctx context = {prgm_name, prgm_path, &isassoc};
file_each("/", assoc_file_each_cb, &context);
}
cfg_close();
}
ld_bin_format = LD_ERROR_BIN;
uint32_t signature;
NUC_FILE *prgm = nuc_fopen(prgm_path, "rb");
if(nuc_fread(&signature, sizeof(signature), 1, prgm) != 1)
{
// empty file?
nuc_fclose(prgm);
return 0xDEAD;
}
nuc_fseek(prgm, 0, SEEK_SET);
void *base = 0;
int (*entry)(int argc, char *argv[]);
switch(signature)
{
case 0x00475250: //"PRG\0"
if((ret = ndless_load(prgm_path, prgm, &base, &entry)) == 0)
{
nuc_fclose(prgm);
ld_bin_format = LD_PRG_BIN;
break;
}
nuc_fclose(prgm);
return ret == 1 ? 0xDEAD : 0xBEEF;
case 0x544c4662: //"bFLT"
if(bflt_load(prgm, &base, &entry) == 0)
{
nuc_fclose(prgm);
ld_bin_format = LD_BFLT_BIN;
break;
}
nuc_fclose(prgm);
return 0xDEAD;
case 0x6e68655a: //"Zehn"
if((ret = zehn_load(prgm, &base, &entry)) == 0)
{
nuc_fclose(prgm);
ld_bin_format = LD_ZEHN_BIN;
break;
}
if(base && base != emu_debug_alloc_ptr)
free(base);
nuc_fclose(prgm);
return ret == 1 ? 0xDEAD : 0xBEEF;
default:
nuc_fclose(prgm);
return 0xDEAD;
}
int intmask = TCT_Local_Control_Interrupts(-1); /* TODO workaround: disable the interrupts to avoid the clock on the screen */
wait_no_key_pressed(); // let the user release the Enter key, to avoid being read by the program
void *savedscr = malloc(SCREEN_BYTES_SIZE);
if (!savedscr) {
puts("ld_exec: can't malloc savedscr");
ret = 0xDEAD;
goto ld_exec_with_args_quit;
}
memcpy(savedscr, (void*) SCREEN_BASE_ADDRESS, SCREEN_BYTES_SIZE);
argc = 1 + argsn;
if (isassoc)
argc++;
argv = malloc((argc + 1) * sizeof(char*));
if (!argv) {
puts("ld_exec: can't malloc argv");
ret = 0xDEAD;
goto ld_exec_with_args_quit;
}
argv[0] = prgm_path;
argvptr = &argv[1];
if (isassoc) {
argv[1] = doc_path;
argvptr++;
}
if (args)
memcpy(argvptr, args, argsn * sizeof(char*));
argv[argc] = NULL;
if (has_colors) {
volatile unsigned *palette = (volatile unsigned*)0xC0000200;
for (i = 0; i < 16/2; i++)
*palette++ = ((i * 2 + 1) << (1 + 16)) | ((i * 2 + 1) << (6 + 16)) | ((i * 2 + 1) << (11 + 16)) | ((i * 2) << 1) | ((i * 2) << 6) | ((i * 2) << 11); // set the grayscale palette
ut_disable_watchdog(); // seems to be sometimes renabled by the OS
}
is_current_prgm_resident = FALSE;
clear_cache();
ret = entry(argc, argv); /* run the program */
if (has_colors)
lcd_incolor(); // in case not restored by the program
if (!plh_noscrredraw)
memcpy((void*) SCREEN_BASE_ADDRESS, savedscr, SCREEN_BYTES_SIZE);
ld_exec_with_args_quit:
free(savedscr);
wait_no_key_pressed(); // let the user release the key used to exit the program, to avoid being read by the OS
TCT_Local_Control_Interrupts(intmask);
if (ret != 0xDEAD && resident_ptr) {
*resident_ptr = base;
return ret;
}
if (is_current_prgm_resident) // required by the program itself
return ret;
if (!emu_debug_alloc_ptr)
free(base);
free(argv);
return ret;
}
