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kern: SvcSetMemoryPermission

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This commit is contained in:
Michael Scire
2020-07-23 00:58:44 -07:00
committed by SciresM
parent d87a9f011c
commit c622539b95
2 changed files with 60 additions and 3 deletions
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33
libraries/libmesosphere/source/svc/kern_svc_memory.cpp
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@@ -21,6 +21,35 @@ namespace ams::kern::svc {
namespace {
constexpr bool IsValidSetMemoryPermission(ams::svc::MemoryPermission perm) {
switch (perm) {
case ams::svc::MemoryPermission_None:
case ams::svc::MemoryPermission_Read:
case ams::svc::MemoryPermission_ReadWrite:
return true;
default:
return false;
}
}
Result SetMemoryPermission(uintptr_t address, size_t size, ams::svc::MemoryPermission perm) {
/* Validate address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
/* Validate the permission. */
R_UNLESS(IsValidSetMemoryPermission(perm), svc::ResultInvalidNewMemoryPermission());
/* Validate that the region is in range for the current process. */
auto &page_table = GetCurrentProcess().GetPageTable();
R_UNLESS(page_table.Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Set the memory attribute. */
return page_table.SetMemoryPermission(address, size, perm);
}
Result SetMemoryAttribute(uintptr_t address, size_t size, uint32_t mask, uint32_t attr) {
/* Validate address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
@@ -97,7 +126,7 @@ namespace ams::kern::svc {
/* ============================= 64 ABI ============================= */
Result SetMemoryPermission64(ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission perm) {
MESOSPHERE_PANIC("Stubbed SvcSetMemoryPermission64 was called.");
return SetMemoryPermission(address, size, perm);
}
Result SetMemoryAttribute64(ams::svc::Address address, ams::svc::Size size, uint32_t mask, uint32_t attr) {
@@ -115,7 +144,7 @@ namespace ams::kern::svc {
/* ============================= 64From32 ABI ============================= */
Result SetMemoryPermission64From32(ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission perm) {
MESOSPHERE_PANIC("Stubbed SvcSetMemoryPermission64From32 was called.");
return SetMemoryPermission(address, size, perm);
}
Result SetMemoryAttribute64From32(ams::svc::Address address, ams::svc::Size size, uint32_t mask, uint32_t attr) {