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Kernel initializes a stack for new processes

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ngiddings
2022-08-23 13:13:46 -05:00
parent bacedbea86
commit 8b1d7cb085
1 changed files with 7 additions and 1 deletions
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8
src/kernel.c
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@@ -230,10 +230,16 @@ unsigned long kernel_spawn_process(void *program_entry, int priority, physaddr_t
{ {
return 0; return 0;
} }
physaddr_t stack_page = reserve_page();
if(stack_page % page_size)
{
return 0;
}
map_page((void*)&_kernel_start - page_size, stack_page, PAGE_PRESENT | PAGE_USERMODE | PAGE_RW);
memset(initial_context, 0, sizeof(struct process_context_t)); memset(initial_context, 0, sizeof(struct process_context_t));
set_context_pc(initial_context, program_entry); set_context_pc(initial_context, program_entry);
set_context_flags(initial_context, DEFAULT_FLAGS); set_context_flags(initial_context, DEFAULT_FLAGS);
set_context_stack(initial_context, NULL); set_context_stack(initial_context, &_kernel_start);
new_process->priority = priority; new_process->priority = priority;
new_process->pid = kernel.next_pid; new_process->pid = kernel.next_pid;
new_process->page_table = address_space; new_process->page_table = address_space;