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Code Issues Releases Activity

loader: nso: Fix loading of static objects to be properly sized and aligned.

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This commit is contained in:
bunnei 2020-03-20 23:44:28 -04:00
parent b11b424a2d
commit 7aa0e4a7ca
1 changed files with 9 additions and 19 deletions
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28
src/core/loader/nso.cpp
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@ -97,13 +97,12 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
if (nso_header.IsSegmentCompressed(i)) {
data = DecompressSegment(data, nso_header.segments[i]);
}
program_image.resize(nso_header.segments[i].location +
PageAlignSize(static_cast<u32>(data.size())));
program_image.resize(nso_header.segments[i].location + static_cast<u32>(data.size()));
std::memcpy(program_image.data() + nso_header.segments[i].location, data.data(),
data.size());
codeset.segments[i].addr = nso_header.segments[i].location;
codeset.segments[i].offset = nso_header.segments[i].location;
codeset.segments[i].size = PageAlignSize(static_cast<u32>(data.size()));
codeset.segments[i].size = nso_header.segments[i].size;
}
if (should_pass_arguments) {
@ -123,24 +122,15 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
arg_data.size());
}
// MOD header pointer is at .text offset + 4
u32 module_offset;
std::memcpy(&module_offset, program_image.data() + 4, sizeof(u32));
// Read MOD header
MODHeader mod_header{};
// Default .bss to size in segment header if MOD0 section doesn't exist
u32 bss_size{PageAlignSize(nso_header.segments[2].bss_size)};
std::memcpy(&mod_header, program_image.data() + module_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.DataSegment().size += bss_size;
const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
codeset.DataSegment().size += nso_header.segments[2].bss_size;
const u32 image_size{
PageAlignSize(static_cast<u32>(program_image.size()) + nso_header.segments[2].bss_size)};
program_image.resize(image_size);
for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
codeset.segments[i].size = PageAlignSize(codeset.segments[i].size);
}
// Apply patches if necessary
if (pm && (pm->HasNSOPatch(nso_header.build_id) || Settings::values.dump_nso)) {
std::vector<u8> pi_header;