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kern: implement SvcMapMemory

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This commit is contained in:
Michael Scire 2020-07-09 18:12:04 -07:00
parent 78da7422ae
commit 9503aae522
5 changed files with 105 additions and 5 deletions
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31
libraries/libmesosphere/source/svc/kern_svc_memory.cpp
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@ -21,6 +21,33 @@ namespace ams::kern::svc {
namespace {
Result MapMemory(uintptr_t dst_address, uintptr_t src_address, size_t size) {
/* Log the call parameters for debugging. */
MESOSPHERE_LOG("MapMemory(%zx, %zx, %zx)\n", dst_address, src_address, size);
/* Validate that addresses are page aligned. */
R_UNLESS(util::IsAligned(dst_address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(src_address, PageSize), svc::ResultInvalidAddress());
/* Validate that size is positive and page aligned. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
/* Ensure that neither mapping overflows. */
R_UNLESS(src_address < src_address + size, svc::ResultInvalidCurrentMemory());
R_UNLESS(dst_address < dst_address + size, svc::ResultInvalidCurrentMemory());
/* Get the page table we're operating on. */
auto &page_table = GetCurrentProcess().GetPageTable();
/* Ensure that the memory we're mapping is in range. */
R_UNLESS(page_table.Contains(src_address, size), svc::ResultInvalidCurrentMemory());
R_UNLESS(page_table.CanContain(dst_address, size, KMemoryState_Stack), svc::ResultInvalidMemoryRegion());
/* Map the memory. */
return page_table.MapMemory(dst_address, src_address, size);
}
Result UnmapMemory(uintptr_t dst_address, uintptr_t src_address, size_t size) {
/* Log the call parameters for debugging. */
MESOSPHERE_LOG("UnmapMemory(%zx, %zx, %zx)\n", dst_address, src_address, size);
@ -61,7 +88,7 @@ namespace ams::kern::svc {
}
Result MapMemory64(ams::svc::Address dst_address, ams::svc::Address src_address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcMapMemory64 was called.");
return MapMemory(dst_address, src_address, size);
}
Result UnmapMemory64(ams::svc::Address dst_address, ams::svc::Address src_address, ams::svc::Size size) {
@ -79,7 +106,7 @@ namespace ams::kern::svc {
}
Result MapMemory64From32(ams::svc::Address dst_address, ams::svc::Address src_address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcMapMemory64From32 was called.");
return MapMemory(dst_address, src_address, size);
}
Result UnmapMemory64From32(ams::svc::Address dst_address, ams::svc::Address src_address, ams::svc::Size size) {