Nikilite/suyu
1
1
Fork 0
forked from suyu/suyu
Code Pull requests Activity

fixup! hle: kernel: Add initial impl. of slab setup.

Browse source
This commit is contained in:
bunnei 2021-05-01 12:25:51 -07:00
parent d3c166d4d5
commit 91d8657959
1 changed files with 8 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
src/core/hle/kernel/init/init_slab_setup.cpp
View file

@ -146,21 +146,21 @@ void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
VAddr address = memory_layout.GetSlabRegionAddress();
// Initialize slab type array to be in sorted order.
KSlabType slab_types[KSlabType_Count];
for (size_t i = 0; i < Common::Size(slab_types); i++) {
std::array<KSlabType, KSlabType_Count> slab_types;
for (size_t i = 0; i < slab_types.size(); i++) {
slab_types[i] = static_cast<KSlabType>(i);
}
// N shuffles the slab type array with the following simple algorithm.
for (size_t i = 0; i < Common::Size(slab_types); i++) {
const size_t rnd = KSystemControl::GenerateRandomRange(0, Common::Size(slab_types) - 1);
for (size_t i = 0; i < slab_types.size(); i++) {
const size_t rnd = KSystemControl::GenerateRandomRange(0, slab_types.size() - 1);
std::swap(slab_types[i], slab_types[rnd]);
}
// Create an array to represent the gaps between the slabs.
const size_t total_gap_size = CalculateSlabHeapGapSize();
size_t slab_gaps[Common::Size(slab_types)];
for (size_t i = 0; i < Common::Size(slab_gaps); i++) {
std::array<size_t, slab_types.size()> slab_gaps;
for (size_t i = 0; i < slab_gaps.size(); i++) {
// Note: This is an off-by-one error from Nintendo's intention, because GenerateRandomRange
// is inclusive. However, Nintendo also has the off-by-one error, and it's "harmless", so we
// will include it ourselves.
@ -169,13 +169,13 @@ void InitializeSlabHeaps(Core::System& system, KMemoryLayout& memory_layout) {
// Sort the array, so that we can treat differences between values as offsets to the starts of
// slabs.
for (size_t i = 1; i < Common::Size(slab_gaps); i++) {
for (size_t i = 1; i < slab_gaps.size(); i++) {
for (size_t j = i; j > 0 && slab_gaps[j - 1] > slab_gaps[j]; j--) {
std::swap(slab_gaps[j], slab_gaps[j - 1]);
}
}
for (size_t i = 0; i < Common::Size(slab_types); i++) {
for (size_t i = 0; i < slab_types.size(); i++) {
// Add the random gap to the address.
address += (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];