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kern: add KPageGroup::CopyRangeTo

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Michael Scire 2024-03-28 02:50:37 -07:00 • committed by SciresM
parent 952188fc73
commit 6922eae3e7
3 changed files with 58 additions and 23 deletions
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27
libraries/libmesosphere/source/kern_k_initial_process_reader.cpp
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@ -79,29 +79,7 @@ namespace ams::kern {
/* Create a page group representing the segment. */
KPageGroup segment_pg(Kernel::GetSystemSystemResource().GetBlockInfoManagerPointer());
if (size_t remaining_size = util::AlignUp(seg_size, PageSize); remaining_size != 0) {
/* Find the pages whose data corresponds to the segment. */
size_t cur_offset = 0;
for (auto it = pg.begin(); it != pg.end() && remaining_size > 0; ++it) {
/* Get the current size. */
const size_t cur_size = it->GetSize();
/* Determine if the offset is in range. */
const size_t rel_diff = seg_offset - cur_offset;
const bool is_before = cur_offset <= seg_offset;
cur_offset += cur_size;
if (is_before && seg_offset < cur_offset) {
/* It is, so add the block. */
const size_t block_size = std::min<size_t>(cur_size - rel_diff, remaining_size);
MESOSPHERE_R_ABORT_UNLESS(segment_pg.AddBlock(it->GetAddress() + rel_diff, block_size / PageSize));
/* Advance. */
cur_offset = seg_offset + block_size;
remaining_size -= block_size;
seg_offset += block_size;
}
}
}
MESOSPHERE_R_ABORT_UNLESS(pg.CopyRangeTo(segment_pg, seg_offset, util::AlignUp(seg_size, PageSize)));
/* Setup the new page group's memory so that we can load the segment. */
{
@ -226,6 +204,9 @@ namespace ams::kern {
const uintptr_t map_end = map_start + map_size;
MESOSPHERE_ABORT_UNLESS(start_address == 0);
/* Default fields in parameter to zero. */
*out = {};
/* Set fields in parameter. */
out->code_address = map_start + start_address;
out->code_num_pages = util::AlignUp(end_address - start_address, PageSize) / PageSize;