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Improve embedded PCK loading and exporting.

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Windows export process:
  Limit size of executable with embedded PCK to 4 GB.
  Use "rcedit" before embedding PCK.
  Capture and process "rcedit" errors.

Windows, Linux:
  Add support for PCK loading from executable "pck" section.
This commit is contained in:
bruvzg 2021-12-20 11:28:54 +02:00
parent f4b0c7a1ea
commit c0cc41d6c1
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GPG key ID: 7960FCF39844EC38
12 changed files with 310 additions and 75 deletions
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85
platform/linuxbsd/os_linuxbsd.cpp
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@ -242,6 +242,91 @@ bool OS_LinuxBSD::_check_internal_feature_support(const String &p_feature) {
return p_feature == "pc";
}
uint64_t OS_LinuxBSD::get_embedded_pck_offset() const {
Ref<FileAccess> f = FileAccess::open(get_executable_path(), FileAccess::READ);
if (f.is_null()) {
return 0;
}
// Read and check ELF magic number.
{
uint32_t magic = f->get_32();
if (magic != 0x464c457f) { // 0x7F + "ELF"
return 0;
}
}
// Read program architecture bits from class field.
int bits = f->get_8() * 32;
// Get info about the section header table.
int64_t section_table_pos;
int64_t section_header_size;
if (bits == 32) {
section_header_size = 40;
f->seek(0x20);
section_table_pos = f->get_32();
f->seek(0x30);
} else { // 64
section_header_size = 64;
f->seek(0x28);
section_table_pos = f->get_64();
f->seek(0x3c);
}
int num_sections = f->get_16();
int string_section_idx = f->get_16();
// Load the strings table.
uint8_t *strings;
{
// Jump to the strings section header.
f->seek(section_table_pos + string_section_idx * section_header_size);
// Read strings data size and offset.
int64_t string_data_pos;
int64_t string_data_size;
if (bits == 32) {
f->seek(f->get_position() + 0x10);
string_data_pos = f->get_32();
string_data_size = f->get_32();
} else { // 64
f->seek(f->get_position() + 0x18);
string_data_pos = f->get_64();
string_data_size = f->get_64();
}
// Read strings data.
f->seek(string_data_pos);
strings = (uint8_t *)memalloc(string_data_size);
if (!strings) {
return 0;
}
f->get_buffer(strings, string_data_size);
}
// Search for the "pck" section.
int64_t off = 0;
for (int i = 0; i < num_sections; ++i) {
int64_t section_header_pos = section_table_pos + i * section_header_size;
f->seek(section_header_pos);
uint32_t name_offset = f->get_32();
if (strcmp((char *)strings + name_offset, "pck") == 0) {
if (bits == 32) {
f->seek(section_header_pos + 0x10);
off = f->get_32();
} else { // 64
f->seek(section_header_pos + 0x18);
off = f->get_64();
}
break;
}
}
memfree(strings);
return off;
}
String OS_LinuxBSD::get_config_path() const {
if (has_environment("XDG_CONFIG_HOME")) {
if (get_environment("XDG_CONFIG_HOME").is_absolute_path()) {