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loader/util: fully implement zstd bic variant

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Implement both compression and decompression utilities and simplify loader logic
This commit is contained in:
hexkyz
2026-04-02 01:30:45 +01:00
parent db388385b0
commit 082115187a
8 changed files with 52733 additions and 22601 deletions
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10
stratosphere/loader/source/ldr_process_creation.cpp
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@@ -22,7 +22,6 @@
#include "ldr_patcher.hpp"
#include "ldr_process_creation.hpp"
#include "ldr_ro_manager.hpp"
#include <stratosphere/util/util_zbic_for_loader.hpp>
namespace ams::ldr {
@@ -121,8 +120,9 @@ namespace ams::ldr {
/* Global NSO header cache. */
NsoHeader g_nso_headers[Nso_Count];
/* Global zstd decompression context */
alignas(8) u8 g_zstd_dctx_workspace[0x176E8];
/* Global Zstd decompression context. */
constexpr size_t ZstdDctxWorkspaceSize = 0x176E8;
alignas(8) u8 g_zstd_dctx_workspace[ZstdDctxWorkspaceSize];
Result ValidateProgramVersion(ncm::ProgramId program_id, u32 version) {
/* No version verification is done before 8.1.0. */
@@ -656,9 +656,7 @@ namespace ams::ldr {
auto compressed_data_buf = reinterpret_cast<const void *>(load_address);
if (is_zstd) {
const size_t map_size = static_cast<size_t>(map_end - map_base);
bool decompressed = util::DecompressZbicForLoader(g_zstd_dctx_workspace, reinterpret_cast<void *>(map_base), map_size, segment_size, file_size, compressed_data_buf);
bool decompressed = util::DecompressZstdForLoader(reinterpret_cast<void *>(g_zstd_dctx_workspace), ZstdDctxWorkspaceSize, reinterpret_cast<void *>(map_base), static_cast<size_t>(map_end - map_base), segment_size, compressed_data_buf, file_size);
R_UNLESS(decompressed, ldr::ResultInvalidNso());
} else {
bool decompressed = (util::DecompressLZ4(reinterpret_cast<void *>(map_base), segment_size, compressed_data_buf, file_size) == static_cast<int>(segment_size));