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We can *actually* load commercial carts now

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wheremyfoodat 2022-10-03 20:18:14 +03:00
parent 87bf469447
commit fca54b99a7
2 changed files with 45 additions and 7 deletions
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46
src/core/loader/ncsd.cpp
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@ -73,14 +73,50 @@ std::optional<NCSD> Memory::loadNCSD(const std::filesystem::path& path) {
printf("NCSD with an invalid CXI in partition 0?\n");
return std::nullopt;
}
printf("Text address = %08X, page count = %08X\n", cxi.text.address, cxi.text.size);
printf("Rodata address = %08X, page count = %08X\n", cxi.rodata.address, cxi.rodata.size);
printf("Data address = %08X, page count = %08X\n", cxi.data.address, cxi.data.size);
// Map code file to memory
const auto& code = cxi.codeFile;
printf("Text address = %08X page count = %08X\n", cxi.text.address, cxi.text.size);
printf("Rodata address = %08X page count = %08X\n", cxi.rodata.address, cxi.rodata.size);
printf("Data address = %08X page count = %08X\n", cxi.data.address, cxi.data.size);
auto& code = cxi.codeFile;
u32 bssSize = (cxi.bssSize + 0xfff) & ~0xfff; // Round BSS size up to a page boundary
// Total memory to allocate for loading
u32 totalSize = (cxi.text.pageCount + cxi.rodata.pageCount + cxi.data.pageCount) * pageSize + bssSize;
code.resize(code.size() + bssSize, 0); // Pad the .code file with zeroes for the BSS segment
ncsd.entrypoint = cxi.text.address;
if (code.size() < totalSize) {
Helpers::panic("Total code size as reported by the exheader is larger than the .code file");
return std::nullopt;
}
const auto opt = findPaddr(totalSize);
if (!opt.has_value()) {
Helpers::panic("Failed to find paddr to map CXI file's code to");
return std::nullopt;
}
const auto paddr = opt.value();
std::memcpy(&fcram[paddr], &code[0], totalSize); // Copy the 3 segments + BSS to FCRAM
// Map the ROM on the kernel side
u32 textOffset = 0;
u32 textAddr = cxi.text.address;
u32 textSize = cxi.text.pageCount * pageSize;
u32 rodataOffset = textOffset + textSize;
u32 rodataAddr = cxi.rodata.address;
u32 rodataSize = cxi.rodata.pageCount * pageSize;
u32 dataOffset = rodataOffset + rodataSize;
u32 dataAddr = cxi.data.address;
u32 dataSize = cxi.data.pageCount * pageSize + bssSize; // We're merging the data and BSS segments, as BSS is just pre-initted .data
allocateMemory(textAddr, paddr + textOffset, textSize, true, true, false, true); // Text is R-X
allocateMemory(rodataAddr, paddr + rodataOffset, rodataSize, true, true, false, false); // Rodata is R--
allocateMemory(dataAddr, paddr + dataOffset, dataSize, true, true, true, false); // Data+BSS is RW-
ncsd.entrypoint = textAddr;
return ncsd;
}