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Implemented sys$execve().

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It's really crufty, but it basically works!
This commit is contained in:
Andreas Kling 2018-11-03 01:49:40 +01:00
parent b59ce22fc5
commit 202bdb553c
9 changed files with 215 additions and 21 deletions
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16
Kernel/MemoryManager.cpp
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@ -31,21 +31,21 @@ MemoryManager::~MemoryManager()
{
}
void MemoryManager::populate_page_directory(Process& process)
void MemoryManager::populate_page_directory(PageDirectory& page_directory)
{
memset(process.m_page_directory, 0, sizeof(PageDirectory));
process.m_page_directory->entries[0] = m_kernel_page_directory->entries[0];
process.m_page_directory->entries[1] = m_kernel_page_directory->entries[1];
memset(&page_directory, 0, sizeof(PageDirectory));
page_directory.entries[0] = m_kernel_page_directory->entries[0];
page_directory.entries[1] = m_kernel_page_directory->entries[1];
}
void MemoryManager::release_page_directory(Process& process)
void MemoryManager::release_page_directory(PageDirectory& page_directory)
{
ASSERT_INTERRUPTS_DISABLED();
#ifdef MM_DEBUG
dbgprintf("MM: release_page_directory for pid %d, PD K%x\n", process.pid(), process.m_page_directory);
dbgprintf("MM: release_page_directory for PD K%x\n", &page_directory);
#endif
for (size_t i = 0; i < 1024; ++i) {
auto page_table = process.m_page_directory->physical_addresses[i];
auto page_table = page_directory.physical_addresses[i];
if (!page_table.is_null()) {
#ifdef MM_DEBUG
dbgprintf("MM: deallocating process page table [%u] P%x @ %p\n", i, page_table.get(), &process.m_page_directory->physical_addresses[i]);
@ -54,7 +54,7 @@ void MemoryManager::release_page_directory(Process& process)
}
}
#ifdef SCRUB_DEALLOCATED_PAGE_TABLES
memset(process.m_page_directory, 0xc9, sizeof(PageDirectory));
memset(&page_directory, 0xc9, sizeof(PageDirectory));
#endif
}