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fusee_cpp: tweaks, now completes SecureInitialize on hardware

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Michael Scire 2021-08-21 22:20:44 -07:00 • committed by SciresM
parent c91f95e8f6
commit f2a1c60218
6 changed files with 24 additions and 41 deletions
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15
fusee_cpp/loader_stub/source/fusee_loader_main.cpp
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@ -26,16 +26,11 @@ namespace ams::nxboot::loader {
constexpr size_t ProgramImageSizeMax = ProgramImageEnd - ProgramImageBase;
void CopyBackwards(void *dst, const void *src, size_t size) {
/* We want to copy 32-bits at a time from destination to source. */
const size_t words = util::DivideUp(size, sizeof(u32));
u8 *dst_8 = static_cast<u8 *>(dst) + size;
const u8 *src_8 = static_cast<const u8 *>(src) + size;
/* Convert to 32-bit pointers. */
u32 *dst_32 = static_cast<u32 *>(dst) + words;
const u32 *src_32 = static_cast<const u32 *>(src) + words;
/* Copy data. */
for (size_t i = 0; i < words; ++i) {
*(--dst_32) = *(--src_32);
for (size_t i = 0; i < size; ++i) {
*(--dst_8) = *(--src_8);
}
}
@ -43,7 +38,7 @@ namespace ams::nxboot::loader {
NORETURN void UncompressAndExecute(const void *program, size_t program_size) {
/* Relocate the compressed binary to a place where we can safely decompress it. */
void *relocated_program = reinterpret_cast<void *>(util::AlignDown(ProgramImageEnd - program_size, sizeof(u32)));
void *relocated_program = reinterpret_cast<void *>(ProgramImageEnd - program_size);
if (relocated_program != program) {
CopyBackwards(relocated_program, program, program_size);
}