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kern: implement KUserPointer (and test with QueryMemory) in advance of svc dev

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This commit is contained in:
Michael Scire 2020-02-20 09:05:01 -08:00
parent 9f9593e05f
commit efae01c165
17 changed files with 460 additions and 72 deletions
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2
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu.hpp
View file

@ -16,7 +16,7 @@
#pragma once
#include <vapours.hpp>
#include <mesosphere/arch/arm64/kern_cpu_system_registers.hpp>
#include <mesosphere/arch/arm64/kern_userspace_memory_access.hpp>
#include <mesosphere/kern_select_userspace_memory_access.hpp>
namespace ams::kern::arch::arm64::cpu {

6
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
View file

@ -52,6 +52,10 @@ namespace ams::kern::arch::arm64 {
return this->page_table.SetMaxHeapSize(size);
}
Result QueryInfo(KMemoryInfo *out_info, ams::svc::PageInfo *out_page_info, KProcessAddress addr) const {
return this->page_table.QueryInfo(out_info, out_page_info, addr);
}
Result MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {
return this->page_table.MapIo(phys_addr, size, perm);
}
@ -84,7 +88,7 @@ namespace ams::kern::arch::arm64 {
return this->page_table.GetPhysicalAddress(out, address);
}
bool CanContain(KProcessAddress addr, size_t size) const { return this->page_table.CanContain(addr, size); }
bool Contains(KProcessAddress addr, size_t size) const { return this->page_table.Contains(addr, size); }
bool CanContain(KProcessAddress addr, size_t size, KMemoryState state) const { return this->page_table.CanContain(addr, size, state); }
KProcessAddress GetAddressSpaceStart() const { return this->page_table.GetAddressSpaceStart(); }

39
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_userspace_memory_access.hpp
View file

@ -18,13 +18,40 @@
namespace ams::kern::arch::arm64 {
void UserspaceMemoryAccessFunctionAreaBegin();
void UserspaceAccessFunctionAreaBegin();
bool StoreDataCache(uintptr_t start, uintptr_t end);
bool FlushDataCache(uintptr_t start, uintptr_t end);
bool InvalidateDataCache(uintptr_t start, uintptr_t end);
bool InvalidateInstructionCache(uintptr_t start, uintptr_t end);
class UserspaceAccess {
public:
static bool CopyMemoryFromUser(void *dst, const void *src, size_t size);
static bool CopyMemoryFromUserAligned32Bit(void *dst, const void *src, size_t size);
static bool CopyMemoryFromUserAligned64Bit(void *dst, const void *src, size_t size);
static bool CopyMemoryFromUserSize32Bit(void *dst, const void *src);
static s32 CopyStringFromUser(void *dst, const void *src, size_t size);
void UserspaceMemoryAccessFunctionAreaEnd();
static bool CopyMemoryToUser(void *dst, const void *src, size_t size);
static bool CopyMemoryToUserAligned32Bit(void *dst, const void *src, size_t size);
static bool CopyMemoryToUserAligned64Bit(void *dst, const void *src, size_t size);
static bool CopyMemoryToUserSize32Bit(void *dst, const void *src);
static s32 CopyStringToUser(void *dst, const void *src, size_t size);
static bool ClearMemory(void *dst, size_t size);
static bool ClearMemoryAligned32Bit(void *dst, size_t size);
static bool ClearMemorySize32Bit(void *dst);
static bool StoreDataCache(uintptr_t start, uintptr_t end);
static bool FlushDataCache(uintptr_t start, uintptr_t end);
static bool InvalidateDataCache(uintptr_t start, uintptr_t end);
static bool InvalidateInstructionCache(uintptr_t start, uintptr_t end);
static bool ReadIoMemory32Bit(void *dst, const void *src, size_t size);
static bool ReadIoMemory16Bit(void *dst, const void *src, size_t size);
static bool ReadIoMemory8Bit(void *dst, const void *src, size_t size);
static bool WriteIoMemory32Bit(void *dst, const void *src, size_t size);
static bool WriteIoMemory16Bit(void *dst, const void *src, size_t size);
static bool WriteIoMemory8Bit(void *dst, const void *src, size_t size);
};
void UserspaceAccessFunctionAreaEnd();
}

3
libraries/libmesosphere/include/mesosphere/kern_k_auto_object.hpp
View file

@ -221,6 +221,9 @@ namespace ams::kern {
constexpr ALWAYS_INLINE void Reset(T *o) {
KScopedAutoObject(o).Swap(*this);
}
constexpr ALWAYS_INLINE bool IsNull() const { return this->obj == nullptr; }
constexpr ALWAYS_INLINE bool IsNotNull() const { return this->obj != nullptr; }
};

31
libraries/libmesosphere/include/mesosphere/kern_k_handle_table.hpp
View file

@ -26,6 +26,9 @@ namespace ams::kern {
return util::BitPack32{handle};
}
class KProcess;
class KThread;
class KHandleTable {
NON_COPYABLE(KHandleTable);
NON_MOVEABLE(KHandleTable);
@ -125,6 +128,19 @@ namespace ams::kern {
template<typename T = KAutoObject>
ALWAYS_INLINE KScopedAutoObject<T> GetObject(ams::svc::Handle handle) const {
MESOSPHERE_ASSERT_THIS();
/* Handle pseudo-handles. */
if constexpr (std::is_same<T, KProcess>::value) {
if (handle == ams::svc::PseudoHandle::CurrentProcess) {
return GetCurrentProcessPointer();
}
} else if constexpr (std::is_same<T, KThread>::value) {
if (handle == ams::svc::PseudoHandle::CurrentThread) {
return GetCurrentThreadPointer();
}
}
/* Lock and look up in table. */
KScopedDisableDispatch dd;
KScopedSpinLock lk(this->lock);
@ -139,6 +155,21 @@ namespace ams::kern {
ALWAYS_INLINE KScopedAutoObject<T> GetObjectForIpc(ams::svc::Handle handle) const {
static_assert(!std::is_base_of<KInterruptEvent, T>::value);
/* Handle pseudo-handles. */
if constexpr (std::is_same<T, KProcess>::value) {
if (handle == ams::svc::PseudoHandle::CurrentProcess) {
return GetCurrentProcessPointer();
}
} else if constexpr (std::is_same<T, KThread>::value) {
if (handle == ams::svc::PseudoHandle::CurrentThread) {
return GetCurrentThreadPointer();
}
}
/* Lock and look up in table. */
KScopedDisableDispatch dd;
KScopedSpinLock lk(this->lock);
KAutoObject *obj = this->GetObjectImpl(handle);
if (obj->DynamicCast<KInterruptEvent *>() != nullptr) {
return nullptr;

5
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -172,11 +172,11 @@ namespace ams::kern {
constexpr bool IsKernel() const { return this->is_kernel; }
constexpr bool IsAslrEnabled() const { return this->enable_aslr; }
constexpr bool CanContain(KProcessAddress addr) const {
constexpr bool Contains(KProcessAddress addr) const {
return this->address_space_start <= addr && addr <= this->address_space_end - 1;
}
constexpr bool CanContain(KProcessAddress addr, size_t size) const {
constexpr bool Contains(KProcessAddress addr, size_t size) const {
return this->address_space_start <= addr && addr < addr + size && addr + size - 1 <= this->address_space_end - 1;
}
@ -249,6 +249,7 @@ namespace ams::kern {
Result SetProcessMemoryPermission(KProcessAddress addr, size_t size, ams::svc::MemoryPermission perm);
Result SetHeapSize(KProcessAddress *out, size_t size);
Result SetMaxHeapSize(size_t size);
Result QueryInfo(KMemoryInfo *out_info, ams::svc::PageInfo *out_page_info, KProcessAddress addr) const;
Result MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm);
Result MapStatic(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm);
Result MapRegion(KMemoryRegionType region_type, KMemoryPermission perm);

2
libraries/libmesosphere/include/mesosphere/kern_k_process.hpp
View file

@ -123,6 +123,8 @@ namespace ams::kern {
Result Initialize(const ams::svc::CreateProcessParameter &params, const KPageGroup &pg, const u32 *caps, s32 num_caps, KResourceLimit *res_limit, KMemoryManager::Pool pool);
constexpr const char *GetName() const { return this->name; }
constexpr u64 GetProcessId() const { return this->process_id; }
constexpr u64 GetCoreMask() const { return this->capabilities.GetCoreMask(); }

31
libraries/libmesosphere/include/mesosphere/kern_select_userspace_memory_access.hpp Normal file
View file

@ -0,0 +1,31 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_common.hpp>
#ifdef ATMOSPHERE_ARCH_ARM64
#include <mesosphere/arch/arm64/kern_userspace_memory_access.hpp>
namespace ams::kern {
using ams::kern::arch::arm64::UserspaceAccess;
}
#else
#error "Unknown architecture for CPU"
#endif

183
libraries/libmesosphere/include/mesosphere/svc/kern_svc_k_user_pointer.hpp
View file

@ -16,18 +16,187 @@
#pragma once
#include <vapours.hpp>
#include <mesosphere/svc/kern_svc_results.hpp>
#include <mesosphere/kern_select_userspace_memory_access.hpp>
namespace ams::kern::svc {
/* TODO: Actually implement this type. */
template<typename T>
struct KUserPointer : impl::KUserPointerTag {
namespace impl {
/* TODO: C++20
template<typename T>
concept Pointer = std::is_pointer<T>::value;
template<typename T>
concept NonConstPointer = Pointer<T> && !std::is_const<typename std::remove_pointer<T>::type>::value;
template<typename T>
concept ConstPointer = Pointer<T> && std::is_const<typename std::remove_pointer<T>::type>::value;
template<typename T, size_t N>
concept AlignedNPointer = Pointer<T> && alignof(typename std::remove_pointer<T>::type) >= N && util::IsAligned(sizeof(typename std::remove_pointer<T>::type), N);
template<typename T>
concept Aligned8Pointer = AlignedNPointer<T, sizeof(u8)>;
template<typename T>
concept Aligned16Pointer = AlignedNPointer<T, sizeof(u16)> && Aligned8<T>;
template<typename T>
concept Aligned32Pointer = AlignedNPointer<T, sizeof(u32)> && Aligned16<T>;
template<typename T>
concept Aligned64Pointer = AlignedNPointer<T, sizeof(u64)> && Aligned32<T>;
*/
template<typename T>
constexpr inline bool IsPointer = std::is_pointer<T>::value;
template<typename T>
constexpr inline bool IsConstPointer = IsPointer<T> && std::is_const<typename std::remove_pointer<T>::type>::value;
template<typename T>
constexpr inline bool IsNonConstPointer = IsPointer<T> && !std::is_const<typename std::remove_pointer<T>::type>::value;
template<typename T, size_t N>
constexpr inline bool IsAlignedNPointer = IsPointer<T> && alignof(typename std::remove_pointer<T>::type) >= N && util::IsAligned(sizeof(typename std::remove_pointer<T>::type), N);
template<typename _T, typename = void> /* requires Aligned8Pointer<_T> */
class KUserPointerImplTraits {
static_assert(IsAlignedNPointer<_T, sizeof(u8)>);
public:
using T = typename std::remove_const<typename std::remove_pointer<_T>::type>::type;
public:
static Result CopyFromUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryFromUser(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
static Result CopyToUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryToUser(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
};
template<typename _T> /* requires Aligned32Pointer<_T> */
class KUserPointerImplTraits<_T, typename std::enable_if<IsAlignedNPointer<_T, sizeof(u32)> && !IsAlignedNPointer<_T, sizeof(u64)>>::type> {
static_assert(IsAlignedNPointer<_T, sizeof(u32)>);
public:
using T = typename std::remove_const<typename std::remove_pointer<_T>::type>::type;
public:
static Result CopyFromUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryFromUserAligned32Bit(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
static Result CopyToUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryToUserAligned32Bit(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
};
template<typename _T> /* requires Aligned64Pointer<_T> */
class KUserPointerImplTraits<_T, typename std::enable_if<IsAlignedNPointer<_T, sizeof(u64)>>::type> {
static_assert(IsAlignedNPointer<_T, sizeof(u64)>);
public:
using T = typename std::remove_const<typename std::remove_pointer<_T>::type>::type;
public:
static Result CopyFromUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryFromUserAligned64Bit(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
static Result CopyToUserspace(void *dst, const void *src, size_t size) {
R_UNLESS(UserspaceAccess::CopyMemoryToUserAligned64Bit(dst, src, size), svc::ResultInvalidPointer());
return ResultSuccess();
}
};
template<typename _T> /* requires Aligned8Pointer<_T> */
class KUserPointerImpl : impl::KUserPointerTag {
private:
using Traits = KUserPointerImplTraits<_T>;
protected:
using T = typename std::remove_const<typename std::remove_pointer<_T>::type>::type;
private:
_T *ptr;
private:
Result CopyToImpl(void *p, size_t size) const {
return Traits::CopyFromUserspace(p, this->ptr, size);
}
Result CopyFromImpl(const void *p, size_t size) const {
return Traits::CopyToUserspace(this->ptr, p, size);
}
protected:
Result CopyTo(T *p) const { return this->CopyToImpl(p, sizeof(*p)); }
Result CopyFrom(const T *p) const { return this->CopyFromImpl(p, sizeof(*p)); }
Result CopyArrayElementTo(T *p, size_t index) const { return Traits::CopyFromUserspace(p, this->ptr + index, sizeof(*p)); }
Result CopyArrayElementFrom(const T *p, size_t index) const { return Traits::CopyToUserspace(this->ptr + index, p, sizeof(*p)); }
Result CopyArrayTo(T *arr, size_t count) const { return this->CopyToImpl(arr, sizeof(*arr) * count); }
Result CopyArrayFrom(const T *arr, size_t count) const { return this->CopyFromImpl(arr, sizeof(*arr) * count); }
constexpr bool IsNull() const { return this->ptr == nullptr; }
};
template<>
class KUserPointerImpl<const char *> : impl::KUserPointerTag {
private:
using Traits = KUserPointerImplTraits<const char *>;
protected:
using T = char;
private:
const char *ptr;
protected:
Result CopyStringTo(char *dst, size_t size) const {
static_assert(sizeof(char) == 1);
R_UNLESS(UserspaceAccess::CopyStringFromUser(dst, this->ptr, size) > 0, svc::ResultInvalidPointer());
return ResultSuccess();
}
Result CopyArrayElementTo(char *dst, size_t index) const {
return Traits::CopyFromUserspace(dst, this->ptr + index, sizeof(*dst));
}
constexpr bool IsNull() const { return this->ptr == nullptr; }
};
}
template<typename T, typename = void>
class KUserPointer;
template<typename T> /* requires impl::ConstPointer<T> */
struct KUserPointer<T, typename std::enable_if<impl::IsConstPointer<T>>::type> : public impl::KUserPointerImpl<T> {
public:
static_assert(std::is_pointer<T>::value);
static constexpr bool IsInput = std::is_const<typename std::remove_pointer<T>::type>::value;
private:
T pointer;
static constexpr bool IsInput = true;
public:
using impl::KUserPointerImpl<T>::CopyTo;
using impl::KUserPointerImpl<T>::CopyArrayElementTo;
using impl::KUserPointerImpl<T>::CopyArrayTo;
using impl::KUserPointerImpl<T>::IsNull;
};
template<typename T> /* requires impl::NonConstPointer<T> */
struct KUserPointer<T, typename std::enable_if<impl::IsNonConstPointer<T>>::type> : public impl::KUserPointerImpl<T> {
public:
static constexpr bool IsInput = false;
public:
using impl::KUserPointerImpl<T>::CopyFrom;
using impl::KUserPointerImpl<T>::CopyArrayElementFrom;
using impl::KUserPointerImpl<T>::CopyArrayFrom;
using impl::KUserPointerImpl<T>::IsNull;
};
template<>
struct KUserPointer<const char *> : public impl::KUserPointerImpl<const char *> {
public:
static constexpr bool IsInput = true;
public:
using impl::KUserPointerImpl<const char *>::CopyStringTo;
using impl::KUserPointerImpl<const char *>::CopyArrayElementTo;
using impl::KUserPointerImpl<const char *>::IsNull;
};
}

8
libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
View file

@ -294,7 +294,7 @@ namespace ams::kern::arch::arm64::cpu {
ALWAYS_INLINE Result InvalidateDataCacheRange(uintptr_t start, uintptr_t end) {
MESOSPHERE_ASSERT(util::IsAligned(start, DataCacheLineSize));
MESOSPHERE_ASSERT(util::IsAligned(end, DataCacheLineSize));
R_UNLESS(arm64::InvalidateDataCache(start, end), svc::ResultInvalidCurrentMemory());
R_UNLESS(UserspaceAccess::InvalidateDataCache(start, end), svc::ResultInvalidCurrentMemory());
DataSynchronizationBarrier();
return ResultSuccess();
}
@ -302,7 +302,7 @@ namespace ams::kern::arch::arm64::cpu {
ALWAYS_INLINE Result StoreDataCacheRange(uintptr_t start, uintptr_t end) {
MESOSPHERE_ASSERT(util::IsAligned(start, DataCacheLineSize));
MESOSPHERE_ASSERT(util::IsAligned(end, DataCacheLineSize));
R_UNLESS(arm64::StoreDataCache(start, end), svc::ResultInvalidCurrentMemory());
R_UNLESS(UserspaceAccess::StoreDataCache(start, end), svc::ResultInvalidCurrentMemory());
DataSynchronizationBarrier();
return ResultSuccess();
}
@ -310,7 +310,7 @@ namespace ams::kern::arch::arm64::cpu {
ALWAYS_INLINE Result FlushDataCacheRange(uintptr_t start, uintptr_t end) {
MESOSPHERE_ASSERT(util::IsAligned(start, DataCacheLineSize));
MESOSPHERE_ASSERT(util::IsAligned(end, DataCacheLineSize));
R_UNLESS(arm64::FlushDataCache(start, end), svc::ResultInvalidCurrentMemory());
R_UNLESS(UserspaceAccess::FlushDataCache(start, end), svc::ResultInvalidCurrentMemory());
DataSynchronizationBarrier();
return ResultSuccess();
}
@ -318,7 +318,7 @@ namespace ams::kern::arch::arm64::cpu {
ALWAYS_INLINE Result InvalidateInstructionCacheRange(uintptr_t start, uintptr_t end) {
MESOSPHERE_ASSERT(util::IsAligned(start, InstructionCacheLineSize));
MESOSPHERE_ASSERT(util::IsAligned(end, InstructionCacheLineSize));
R_UNLESS(arm64::InvalidateInstructionCache(start, end), svc::ResultInvalidCurrentMemory());
R_UNLESS(UserspaceAccess::InvalidateInstructionCache(start, end), svc::ResultInvalidCurrentMemory());
EnsureInstructionConsistency();
return ResultSuccess();
}

102
libraries/libmesosphere/source/arch/arm64/kern_userspace_memory_access_asm.s
View file

@ -14,20 +14,58 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* ams::kern::arch::arm64::UserspaceMemoryAccessFunctionAreaBegin() */
.section .text._ZN3ams4kern4arch5arm6438UserspaceMemoryAccessFunctionAreaBeginEv, "ax", %progbits
.global _ZN3ams4kern4arch5arm6438UserspaceMemoryAccessFunctionAreaBeginEv
.type _ZN3ams4kern4arch5arm6438UserspaceMemoryAccessFunctionAreaBeginEv, %function
_ZN3ams4kern4arch5arm6438UserspaceMemoryAccessFunctionAreaBeginEv:
/* ams::kern::arch::arm64::UserspaceAccessFunctionAreaBegin() */
.section .text._ZN3ams4kern4arch5arm6432UserspaceAccessFunctionAreaBeginEv, "ax", %progbits
.global _ZN3ams4kern4arch5arm6432UserspaceAccessFunctionAreaBeginEv
.type _ZN3ams4kern4arch5arm6432UserspaceAccessFunctionAreaBeginEv, %function
_ZN3ams4kern4arch5arm6432UserspaceAccessFunctionAreaBeginEv:
/* NOTE: This is not a real function, and only exists as a label for safety. */
/* ================ All Userspace Memory Functions after this line. ================ */
/* ================ All Userspace Access Functions after this line. ================ */
/* ams::kern::arch::arm64::StoreDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6414StoreDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6414StoreDataCacheEmm
.type _ZN3ams4kern4arch5arm6414StoreDataCacheEmm, %function
_ZN3ams4kern4arch5arm6414StoreDataCacheEmm:
/* ams::kern::arch::arm64::UserspaceAccess::CopyMemoryToUserAligned64Bit(void *dst, const void *src, size_t size) */
.section .text._ZN3ams4kern4arch5arm6415UserspaceAccess28CopyMemoryToUserAligned64BitEPvPKvm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6415UserspaceAccess28CopyMemoryToUserAligned64BitEPvPKvm
.type _ZN3ams4kern4arch5arm6415UserspaceAccess28CopyMemoryToUserAligned64BitEPvPKvm, %function
_ZN3ams4kern4arch5arm6415UserspaceAccess28CopyMemoryToUserAligned64BitEPvPKvm:
/* Check if there are 0x40 bytes to copy */
cmp x2, #0x3F
b.ls 1f
ldp x4, x5, [x1, #0x00]
ldp x6, x7, [x1, #0x10]
ldp x8, x9, [x1, #0x20]
ldp x10, x11, [x1, #0x30]
sttr x4, [x0, #0x00]
sttr x5, [x0, #0x08]
sttr x6, [x0, #0x10]
sttr x7, [x0, #0x18]
sttr x8, [x0, #0x20]
sttr x9, [x0, #0x28]
sttr x10, [x0, #0x30]
sttr x11, [x0, #0x38]
add x0, x0, #0x40
add x1, x1, #0x40
sub x2, x2, #0x40
b _ZN3ams4kern4arch5arm6415UserspaceAccess28CopyMemoryToUserAligned64BitEPvPKvm
1: /* We have less than 0x40 bytes to copy. */
cmp x2, #0x0
b.eq 2f
ldr x4, [x1], #0x8
sttr x4, [x0]
add x0, x0, #0x8
sub x2, x2, #0x8
b 1b
2: /* We're done. */
mov x0, #1
ret
/* ams::kern::arch::arm64::UserspaceAccess::StoreDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6415UserspaceAccess14StoreDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6415UserspaceAccess14StoreDataCacheEmm
.type _ZN3ams4kern4arch5arm6415UserspaceAccess14StoreDataCacheEmm, %function
_ZN3ams4kern4arch5arm6415UserspaceAccess14StoreDataCacheEmm:
/* Check if we have any work to do. */
cmp x1, x0
b.eq 2f
@ -42,11 +80,11 @@ _ZN3ams4kern4arch5arm6414StoreDataCacheEmm:
mov x0, #1
ret
/* ams::kern::arch::arm64::FlushDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6414FlushDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6414FlushDataCacheEmm
.type _ZN3ams4kern4arch5arm6414FlushDataCacheEmm, %function
_ZN3ams4kern4arch5arm6414FlushDataCacheEmm:
/* ams::kern::arch::arm64::UserspaceAccess::FlushDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6415UserspaceAccess14FlushDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6415UserspaceAccess14FlushDataCacheEmm
.type _ZN3ams4kern4arch5arm6415UserspaceAccess14FlushDataCacheEmm, %function
_ZN3ams4kern4arch5arm6415UserspaceAccess14FlushDataCacheEmm:
/* Check if we have any work to do. */
cmp x1, x0
b.eq 2f
@ -61,11 +99,11 @@ _ZN3ams4kern4arch5arm6414FlushDataCacheEmm:
mov x0, #1
ret
/* ams::kern::arch::arm64::InvalidateDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6419InvalidateDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6419InvalidateDataCacheEmm
.type _ZN3ams4kern4arch5arm6419InvalidateDataCacheEmm, %function
_ZN3ams4kern4arch5arm6419InvalidateDataCacheEmm:
/* ams::kern::arch::arm64::UserspaceAccess::InvalidateDataCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6415UserspaceAccess19InvalidateDataCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6415UserspaceAccess19InvalidateDataCacheEmm
.type _ZN3ams4kern4arch5arm6415UserspaceAccess19InvalidateDataCacheEmm, %function
_ZN3ams4kern4arch5arm6415UserspaceAccess19InvalidateDataCacheEmm:
/* Check if we have any work to do. */
cmp x1, x0
b.eq 2f
@ -80,11 +118,11 @@ _ZN3ams4kern4arch5arm6419InvalidateDataCacheEmm:
mov x0, #1
ret
/* ams::kern::arch::arm64::InvalidateInstructionCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6426InvalidateInstructionCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6426InvalidateInstructionCacheEmm
.type _ZN3ams4kern4arch5arm6426InvalidateInstructionCacheEmm, %function
_ZN3ams4kern4arch5arm6426InvalidateInstructionCacheEmm:
/* ams::kern::arch::arm64::UserspaceAccess::InvalidateInstructionCache(uintptr_t start, uintptr_t end) */
.section .text._ZN3ams4kern4arch5arm6415UserspaceAccess26InvalidateInstructionCacheEmm, "ax", %progbits
.global _ZN3ams4kern4arch5arm6415UserspaceAccess26InvalidateInstructionCacheEmm
.type _ZN3ams4kern4arch5arm6415UserspaceAccess26InvalidateInstructionCacheEmm, %function
_ZN3ams4kern4arch5arm6415UserspaceAccess26InvalidateInstructionCacheEmm:
/* Check if we have any work to do. */
cmp x1, x0
b.eq 2f
@ -99,11 +137,11 @@ _ZN3ams4kern4arch5arm6426InvalidateInstructionCacheEmm:
mov x0, #1
ret
/* ================ All Userspace Memory Functions before this line. ================ */
/* ================ All Userspace Access Functions before this line. ================ */
/* ams::kern::arch::arm64::UserspaceMemoryAccessFunctionAreaEnd() */
.section .text._ZN3ams4kern4arch5arm6436UserspaceMemoryAccessFunctionAreaEndEv, "ax", %progbits
.global _ZN3ams4kern4arch5arm6436UserspaceMemoryAccessFunctionAreaEndEv
.type _ZN3ams4kern4arch5arm6436UserspaceMemoryAccessFunctionAreaEndEv, %function
_ZN3ams4kern4arch5arm6436UserspaceMemoryAccessFunctionAreaEndEv:
/* ams::kern::arch::arm64::UserspaceAccessFunctionAreaEnd() */
.section .text._ZN3ams4kern4arch5arm6430UserspaceAccessFunctionAreaEndEv, "ax", %progbits
.global _ZN3ams4kern4arch5arm6430UserspaceAccessFunctionAreaEndEv
.type _ZN3ams4kern4arch5arm6430UserspaceAccessFunctionAreaEndEv, %function
_ZN3ams4kern4arch5arm6430UserspaceAccessFunctionAreaEndEv:
/* NOTE: This is not a real function, and only exists as a label for safety. */

23
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -765,6 +765,29 @@ namespace ams::kern {
return ResultSuccess();
}
Result KPageTableBase::QueryInfo(KMemoryInfo *out_info, ams::svc::PageInfo *out_page_info, KProcessAddress addr) const {
/* If the address is invalid, create a fake block. */
if (!this->Contains(addr, 1)) {
*out_info = {
.address = GetInteger(this->address_space_end),
.size = 0 - GetInteger(this->address_space_end),
.state = static_cast<KMemoryState>(ams::svc::MemoryState_Inaccessible),
.perm = KMemoryPermission_None,
.attribute = KMemoryAttribute_None,
.original_perm = KMemoryPermission_None,
.ipc_lock_count = 0,
.device_use_count = 0,
};
out_page_info->flags = 0;
return ResultSuccess();
}
/* Otherwise, lock the table and query. */
KScopedLightLock lk(this->general_lock);
return this->QueryInfoImpl(out_info, out_page_info, addr);
}
Result KPageTableBase::MapIo(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
MESOSPHERE_ASSERT(util::IsAligned(size, PageSize));

8
libraries/libmesosphere/source/svc/kern_svc_memory.cpp
View file

@ -43,10 +43,6 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcUnmapMemory64 was called.");
}
Result QueryMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
MESOSPHERE_PANIC("Stubbed SvcQueryMemory64 was called.");
}
/* ============================= 64From32 ABI ============================= */
Result SetMemoryPermission64From32(ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission perm) {
@ -65,8 +61,4 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcUnmapMemory64From32 was called.");
}
Result QueryMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
MESOSPHERE_PANIC("Stubbed SvcQueryMemory64From32 was called.");
}
}

8
libraries/libmesosphere/source/svc/kern_svc_process_memory.cpp
View file

@ -39,10 +39,6 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcUnmapProcessMemory64 was called.");
}
Result QueryProcessMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64 was called.");
}
Result MapProcessCodeMemory64(ams::svc::Handle process_handle, uint64_t dst_address, uint64_t src_address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcMapProcessCodeMemory64 was called.");
}
@ -65,10 +61,6 @@ namespace ams::kern::svc {
MESOSPHERE_PANIC("Stubbed SvcUnmapProcessMemory64From32 was called.");
}
Result QueryProcessMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64From32 was called.");
}
Result MapProcessCodeMemory64From32(ams::svc::Handle process_handle, uint64_t dst_address, uint64_t src_address, uint64_t size) {
MESOSPHERE_PANIC("Stubbed SvcMapProcessCodeMemory64From32 was called.");
}

75
libraries/libmesosphere/source/svc/kern_svc_query_memory.cpp Normal file
View file

@ -0,0 +1,75 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::svc {
/* ============================= Common ============================= */
namespace {
Result QueryProcessMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uintptr_t address) {
MESOSPHERE_LOG("%s: QueryProcessMemory(0x%08x, 0x%zx) was called\n", GetCurrentProcess().GetName(), process_handle, address);
/* Get the process. */
KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
/* Query the mapping's info. */
KMemoryInfo info;
R_TRY(process->GetPageTable().QueryInfo(std::addressof(info), out_page_info, address));
/* Write output. */
*out_memory_info = info.GetSvcMemoryInfo();
return ResultSuccess();
}
Result QueryMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, uintptr_t address) {
/* Query memory is just QueryProcessMemory on the current process. */
return QueryProcessMemory(out_memory_info, out_page_info, ams::svc::PseudoHandle::CurrentProcess, address);
}
}
/* ============================= 64 ABI ============================= */
Result QueryMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
/* Get an ams::svc::MemoryInfo for the region. */
ams::svc::MemoryInfo info = {};
R_TRY(QueryMemory(std::addressof(info), out_page_info, address));
/* Try to copy to userspace. In the 64-bit case, ams::svc::lp64::MemoryInfo is the same as ams::svc::MemoryInfo. */
static_assert(sizeof(ams::svc::MemoryInfo) == sizeof(ams::svc::lp64::MemoryInfo));
R_TRY(out_memory_info.CopyFrom(std::addressof(info)));
return ResultSuccess();
}
Result QueryProcessMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64 was called.");
}
/* ============================= 64From32 ABI ============================= */
Result QueryMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Address address) {
MESOSPHERE_PANIC("Stubbed SvcQueryMemory64From32 was called.");
}
Result QueryProcessMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle process_handle, uint64_t address) {
MESOSPHERE_PANIC("Stubbed SvcQueryProcessMemory64From32 was called.");
}
}

2
libraries/libvapours/include/vapours/svc/svc_common.hpp
View file

@ -30,7 +30,7 @@ namespace ams::svc {
static constexpr size_t MaxWaitSynchronizationHandleCount = 0x40;
enum class PseudoHandle : Handle {
enum PseudoHandle : Handle {
CurrentThread = 0xFFFF8000,
CurrentProcess = 0xFFFF8001,
};

4
mesosphere/kernel/source/arch/arm64/kern_exception_handlers_asm.s
View file

@ -324,10 +324,10 @@ _ZN3ams4kern4arch5arm6430EL1SynchronousExceptionHandlerEv:
/* Data abort. Check if it was from trying to access userspace memory. */
mrs x1, elr_el1
adr x0, _ZN3ams4kern4arch5arm6438UserspaceMemoryAccessFunctionAreaBeginEv
adr x0, _ZN3ams4kern4arch5arm6432UserspaceAccessFunctionAreaBeginEv
cmp x1, x0
b.lo 3f
adr x0, _ZN3ams4kern4arch5arm6436UserspaceMemoryAccessFunctionAreaEndEv
adr x0, _ZN3ams4kern4arch5arm6430UserspaceAccessFunctionAreaEndEv
cmp x1, x0
b.hs 3f