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kernel/process: Use accessors instead of class members for referencing segment array

Using member variables for referencing the segments array increases the
size of the class in memory for little benefit. The same behavior can be
achieved through the use of accessors that just return the relevant
segment.
This commit is contained in:
Lioncash 2018-08-03 14:33:59 -04:00
parent 40e63ede6d
commit 2beda7c2b3
5 changed files with 40 additions and 20 deletions

View file

@ -142,9 +142,9 @@ void Process::LoadModule(SharedPtr<CodeSet> module_, VAddr base_addr) {
};
// Map CodeSet segments
MapSegment(module_->code, VMAPermission::ReadExecute, MemoryState::CodeStatic);
MapSegment(module_->rodata, VMAPermission::Read, MemoryState::CodeMutable);
MapSegment(module_->data, VMAPermission::ReadWrite, MemoryState::CodeMutable);
MapSegment(module_->CodeSegment(), VMAPermission::ReadExecute, MemoryState::CodeStatic);
MapSegment(module_->RODataSegment(), VMAPermission::Read, MemoryState::CodeMutable);
MapSegment(module_->DataSegment(), VMAPermission::ReadWrite, MemoryState::CodeMutable);
}
ResultVal<VAddr> Process::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {

View file

@ -55,6 +55,12 @@ enum class ProcessStatus { Created, Running, Exited };
class ResourceLimit;
struct CodeSet final : public Object {
struct Segment {
size_t offset = 0;
VAddr addr = 0;
u32 size = 0;
};
static SharedPtr<CodeSet> Create(std::string name);
std::string GetTypeName() const override {
@ -69,24 +75,38 @@ struct CodeSet final : public Object {
return HANDLE_TYPE;
}
/// Name of the process
std::string name;
Segment& CodeSegment() {
return segments[0];
}
const Segment& CodeSegment() const {
return segments[0];
}
Segment& RODataSegment() {
return segments[1];
}
const Segment& RODataSegment() const {
return segments[1];
}
Segment& DataSegment() {
return segments[2];
}
const Segment& DataSegment() const {
return segments[2];
}
std::shared_ptr<std::vector<u8>> memory;
struct Segment {
size_t offset = 0;
VAddr addr = 0;
u32 size = 0;
};
Segment segments[3];
Segment& code = segments[0];
Segment& rodata = segments[1];
Segment& data = segments[2];
VAddr entrypoint;
/// Name of the process
std::string name;
private:
CodeSet();
~CodeSet() override;

View file

@ -311,11 +311,11 @@ SharedPtr<CodeSet> ElfReader::LoadInto(u32 vaddr) {
CodeSet::Segment* codeset_segment;
u32 permission_flags = p->p_flags & (PF_R | PF_W | PF_X);
if (permission_flags == (PF_R | PF_X)) {
codeset_segment = &codeset->code;
codeset_segment = &codeset->CodeSegment();
} else if (permission_flags == (PF_R)) {
codeset_segment = &codeset->rodata;
codeset_segment = &codeset->RODataSegment();
} else if (permission_flags == (PF_R | PF_W)) {
codeset_segment = &codeset->data;
codeset_segment = &codeset->DataSegment();
} else {
LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id {} with flags {:X}", i,
p->p_flags);

View file

@ -159,7 +159,7 @@ bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
// Resize program image to include .bss section and page align each section
bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
}
codeset->data.size += bss_size;
codeset->DataSegment().size += bss_size;
program_image.resize(static_cast<u32>(program_image.size()) + bss_size);
// Load codeset for current process

View file

@ -127,7 +127,7 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
// Resize program image to include .bss section and page align each section
bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
}
codeset->data.size += bss_size;
codeset->DataSegment().size += bss_size;
const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
program_image.resize(image_size);