From d3e63e42204c8e8be02af651fd6281ac204ccba5 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Wed, 17 Jan 2018 20:16:09 -0300
Subject: [PATCH] Fix NRO loading

---
 src/core/loader/nro.cpp | 29 +++++++++--------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/src/core/loader/nro.cpp b/src/core/loader/nro.cpp
index 66c61b038..6864a1926 100644
--- a/src/core/loader/nro.cpp
+++ b/src/core/loader/nro.cpp
@@ -62,20 +62,6 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-static std::vector<u8> ReadSegment(FileUtil::IOFile& file, const NroSegmentHeader& header) {
-    std::vector<u8> data;
-    data.resize(header.size);
-
-    file.Seek(header.offset + sizeof(NroHeader), SEEK_SET);
-    size_t bytes_read{file.ReadBytes(data.data(), header.size)};
-    if (header.size != PageAlignSize(static_cast<u32>(bytes_read))) {
-        LOG_CRITICAL(Loader, "Failed to read NRO segment bytes", header.size);
-        return {};
-    }
-
-    return data;
-}
-
 bool AppLoader_NRO::LoadNro(const std::string& path, VAddr load_base) {
     FileUtil::IOFile file(path, "rb");
     if (!file.IsOpen()) {
@@ -95,7 +81,7 @@ bool AppLoader_NRO::LoadNro(const std::string& path, VAddr load_base) {
     // Build program image
     Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("", 0);
     std::vector<u8> program_image;
-    program_image.resize(PageAlignSize(nro_header.file_size + nro_header.bss_size));
+    program_image.resize(PageAlignSize(nro_header.file_size));
     file.Seek(0, SEEK_SET);
     file.ReadBytes(program_image.data(), nro_header.file_size);
 
@@ -107,15 +93,16 @@ bool AppLoader_NRO::LoadNro(const std::string& path, VAddr load_base) {
 
     // Read MOD header
     ModHeader mod_header{};
-    u32 bss_size{Memory::PAGE_SIZE}; // Default .bss to page size if MOD0 section doesn't exist
+    // Default .bss to NRO header bss size if MOD0 section doesn't exist
+    u32 bss_size{PageAlignSize(nro_header.bss_size)};
     std::memcpy(&mod_header, program_image.data() + nro_header.module_header_offset,
                 sizeof(ModHeader));
     const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
     if (has_mod_header) {
         // Resize program image to include .bss section and page align each section
         bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
-        codeset->data.size += bss_size;
     }
+    codeset->data.size += bss_size;
     program_image.resize(PageAlignSize(static_cast<u32>(program_image.size()) + bss_size));
 
     // Load codeset for current process
@@ -134,9 +121,11 @@ ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
         return ResultStatus::Error;
     }
 
-    // Load and relocate "main" and "sdk" NSO
-    static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
     process = Kernel::Process::Create("main");
+
+    // Load NRO
+    static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
+
     if (!LoadNro(filepath, base_addr)) {
         return ResultStatus::ErrorInvalidFormat;
     }
@@ -145,7 +134,7 @@ ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     process->address_mappings = default_address_mappings;
     process->resource_limit =
         Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
-    process->Run(base_addr, 48, Kernel::DEFAULT_STACK_SIZE);
+    process->Run(base_addr + sizeof(NroHeader), 48, Kernel::DEFAULT_STACK_SIZE);
 
     is_loaded = true;
     return ResultStatus::Success;