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kern: update KAddressSpaceInfo to reflect 20.0.0 changes

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This commit is contained in:
Michael Scire 2025-04-30 18:56:47 -07:00
parent 16fb7ca067
commit 73dd0b5019
6 changed files with 40 additions and 16 deletions
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2
libmesosphere/include/mesosphere/kern_k_address_space_info.hpp
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@ -37,7 +37,7 @@ namespace ams::kern {
size_t m_size;
Type m_type;
public:
static uintptr_t GetAddressSpaceStart(ams::svc::CreateProcessFlag flags, Type type);
static uintptr_t GetAddressSpaceStart(ams::svc::CreateProcessFlag flags, Type type, size_t code_size);
static size_t GetAddressSpaceSize(ams::svc::CreateProcessFlag flags, Type type);
static void SetAddressSpaceSize(size_t width, Type type, size_t size);

31
libmesosphere/source/kern_k_address_space_info.cpp
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@ -66,12 +66,39 @@ namespace ams::kern {
}
uintptr_t KAddressSpaceInfo::GetAddressSpaceStart(ams::svc::CreateProcessFlag flags, KAddressSpaceInfo::Type type) {
uintptr_t KAddressSpaceInfo::GetAddressSpaceStart(ams::svc::CreateProcessFlag flags, KAddressSpaceInfo::Type type, size_t code_size) {
MESOSPHERE_UNUSED(code_size);
return GetAddressSpaceInfo(GetAddressSpaceWidth(flags), type).GetAddress();
}
size_t KAddressSpaceInfo::GetAddressSpaceSize(ams::svc::CreateProcessFlag flags, KAddressSpaceInfo::Type type) {
return GetAddressSpaceInfo(GetAddressSpaceWidth(flags), type).GetSize();
/* Extract the address space from the create process flags. */
const auto as_flags = (flags & ams::svc::CreateProcessFlag_AddressSpaceMask);
/* Get the address space width. */
const auto as_width = GetAddressSpaceWidth(flags);
/* Get the size. */
size_t as_size = GetAddressSpaceInfo(as_width, type).GetSize();
/* If we're getting size for 32-bit without alias, adjust the sizes accordingly. */
if (as_flags == ams::svc::CreateProcessFlag_AddressSpace32BitWithoutAlias) {
switch (type) {
/* The heap space receives space that would otherwise go to the alias space. */
case KAddressSpaceInfo::Type_Heap:
as_size += GetAddressSpaceInfo(as_width, KAddressSpaceInfo::Type_Alias).GetSize();
break;
/* The alias space doesn't exist. */
case KAddressSpaceInfo::Type_Alias:
as_size = 0;
break;
/* Nothing to do by default. */
default:
break;
}
}
return as_size;
}
void KAddressSpaceInfo::SetAddressSpaceSize(size_t width, Type type, size_t size) {

5
libmesosphere/source/kern_k_initial_process_reader.cpp
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@ -229,9 +229,12 @@ namespace ams::kern {
out->flags |= ams::svc::CreateProcessFlag_DisableDeviceAddressSpaceMerge;
/* Set and check code address. */
/* NOTE: Even though Nintendo passes a size to GetAddressSpaceStart at other call sites, they pass */
/* a number of pages here. Even though this is presumably only used for debug assertions, this is */
/* almost certainly a bug. */
using ASType = KAddressSpaceInfo::Type;
const ASType as_type = this->Is64BitAddressSpace() ? ((GetTargetFirmware() >= TargetFirmware_2_0_0) ? KAddressSpaceInfo::Type_Map39Bit : KAddressSpaceInfo::Type_MapSmall) : KAddressSpaceInfo::Type_MapSmall;
const uintptr_t map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(out->flags), as_type);
const uintptr_t map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(out->flags), as_type, out->code_num_pages);
const size_t map_size = KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(out->flags), as_type);
const uintptr_t map_end = map_start + map_size;
out->code_address = map_start + start_address;

8
libmesosphere/source/kern_k_page_table_base.cpp
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@ -141,7 +141,7 @@ namespace ams::kern {
/* Define helpers. */
auto GetSpaceStart = [&](KAddressSpaceInfo::Type type) ALWAYS_INLINE_LAMBDA {
return KAddressSpaceInfo::GetAddressSpaceStart(flags, type);
return KAddressSpaceInfo::GetAddressSpaceStart(flags, type, code_size);
};
auto GetSpaceSize = [&](KAddressSpaceInfo::Type type) ALWAYS_INLINE_LAMBDA {
return KAddressSpaceInfo::GetAddressSpaceSize(flags, type);
@ -155,12 +155,6 @@ namespace ams::kern {
size_t alias_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Alias);
size_t heap_region_size = GetSpaceSize(KAddressSpaceInfo::Type_Heap);
/* Adjust heap/alias size if we don't have an alias region. */
if ((flags & ams::svc::CreateProcessFlag_AddressSpaceMask) == ams::svc::CreateProcessFlag_AddressSpace32BitWithoutAlias) {
heap_region_size += alias_region_size;
alias_region_size = 0;
}
/* Set code regions and determine remaining sizes. */
KProcessAddress process_code_start;
KProcessAddress process_code_end;

2
libmesosphere/source/kern_k_process.cpp
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@ -221,7 +221,7 @@ namespace ams::kern {
}
/* Set max memory. */
m_max_process_memory = m_page_table.GetHeapRegionSize();
m_max_process_memory = KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(m_flags), KAddressSpaceInfo::Type_Heap);
/* Generate random entropy. */
KSystemControl::GenerateRandom(m_entropy, util::size(m_entropy));

8
libmesosphere/source/svc/kern_svc_process.cpp
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@ -109,11 +109,12 @@ namespace ams::kern::svc {
/* Decide on an address space map region. */
uintptr_t map_start, map_end;
size_t map_size;
const size_t code_size = params.code_num_pages * PageSize;
switch (params.flags & ams::svc::CreateProcessFlag_AddressSpaceMask) {
case ams::svc::CreateProcessFlag_AddressSpace32Bit:
case ams::svc::CreateProcessFlag_AddressSpace32BitWithoutAlias:
{
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall);
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall, code_size);
map_size = KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall);
map_end = map_start + map_size;
}
@ -123,7 +124,7 @@ namespace ams::kern::svc {
/* 64-bit address space requires 64-bit process. */
R_UNLESS(is_64_bit, svc::ResultInvalidCombination());
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall);
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall, code_size);
map_size = KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_MapSmall);
map_end = map_start + map_size;
}
@ -133,7 +134,7 @@ namespace ams::kern::svc {
/* 64-bit address space requires 64-bit process. */
R_UNLESS(is_64_bit, svc::ResultInvalidCombination());
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_Map39Bit);
map_start = KAddressSpaceInfo::GetAddressSpaceStart(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_Map39Bit, code_size);
map_end = map_start + KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_Map39Bit);
map_size = KAddressSpaceInfo::GetAddressSpaceSize(static_cast<ams::svc::CreateProcessFlag>(params.flags), KAddressSpaceInfo::Type_Heap);
@ -181,7 +182,6 @@ namespace ams::kern::svc {
const size_t code_num_pages = params.code_num_pages;
const size_t system_resource_num_pages = params.system_resource_num_pages;
const size_t total_pages = code_num_pages + system_resource_num_pages;
const size_t code_size = code_num_pages * PageSize;
const size_t system_resource_size = system_resource_num_pages * PageSize;
const size_t total_size = code_size + system_resource_size;