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Kernel: Invalid physical addresses from heap are specified now by 0

This commit is contained in:
Bananymous 2023-05-06 01:03:04 +03:00
parent bc35a561d3
commit b65cd1d09b
3 changed files with 5 additions and 8 deletions
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3
kernel/include/kernel/Memory/Heap.h
View File

@ -15,9 +15,6 @@ namespace Kernel
class PhysicalRange class PhysicalRange
{ {
public:
static constexpr paddr_t invalid = ~paddr_t(0);
public: public:
PhysicalRange(paddr_t, size_t); PhysicalRange(paddr_t, size_t);
paddr_t reserve_page(); paddr_t reserve_page();

4
kernel/kernel/Memory/Heap.cpp
View File

@ -55,7 +55,7 @@ namespace Kernel
paddr_t PhysicalRange::reserve_page() paddr_t PhysicalRange::reserve_page()
{ {
if (m_free_list == nullptr) if (m_free_list == nullptr)
return invalid; return 0;
node* page = m_free_list; node* page = m_free_list;
ASSERT(page->next == nullptr); ASSERT(page->next == nullptr);
@ -161,7 +161,7 @@ namespace Kernel
paddr_t Heap::take_free_page() paddr_t Heap::take_free_page()
{ {
for (auto& range : m_physical_ranges) for (auto& range : m_physical_ranges)
if (paddr_t page = range.reserve_page(); page != PhysicalRange::invalid) if (paddr_t page = range.reserve_page())
return page; return page;
ASSERT_NOT_REACHED(); ASSERT_NOT_REACHED();
} }

6
kernel/kernel/Process.cpp
View File

@ -75,14 +75,14 @@ namespace Kernel
uint8_t flags = MMU::Flags::UserSupervisor | MMU::Flags::Present; uint8_t flags = MMU::Flags::UserSupervisor | MMU::Flags::Present;
if (elf_program_header.p_flags & LibELF::PF_W) if (elf_program_header.p_flags & LibELF::PF_W)
flags |= MMU::Flags::ReadWrite; flags |= MMU::Flags::ReadWrite;
size_t page_start = elf_program_header.p_vaddr / 4096; size_t page_start = elf_program_header.p_vaddr / PAGE_SIZE;
size_t page_end = BAN::Math::div_round_up<size_t>(elf_program_header.p_vaddr + elf_program_header.p_memsz, 4096); size_t page_end = BAN::Math::div_round_up<size_t>(elf_program_header.p_vaddr + elf_program_header.p_memsz, PAGE_SIZE);
MUST(process->m_allocated_pages.reserve(page_end - page_start + 1)); MUST(process->m_allocated_pages.reserve(page_end - page_start + 1));
for (size_t page = page_start; page <= page_end; page++) for (size_t page = page_start; page <= page_end; page++)
{ {
auto paddr = Heap::get().take_free_page(); auto paddr = Heap::get().take_free_page();
MUST(process->m_allocated_pages.push_back(paddr)); MUST(process->m_allocated_pages.push_back(paddr));
process->m_mmu->map_page_at(paddr, page * 4096, flags); process->m_mmu->map_page_at(paddr, page * PAGE_SIZE, flags);
} }
process->m_mmu->load(); process->m_mmu->load();
memcpy((void*)elf_program_header.p_vaddr, elf->data() + elf_program_header.p_offset, elf_program_header.p_filesz); memcpy((void*)elf_program_header.p_vaddr, elf->data() + elf_program_header.p_offset, elf_program_header.p_filesz);