kamkow1
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127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
#include <amd64/gdt.h>
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#include <amd64/proc.h>
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#include <aux/elf.h>
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#include <libk/list.h>
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#include <libk/rbtree.h>
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#include <libk/std.h>
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#include <libk/string.h>
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#include <limine/requests.h>
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#include <mm/liballoc.h>
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#include <mm/pmm.h>
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#include <proc/proc.h>
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#include <proc/procgroup.h>
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#include <proc/resource.h>
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#include <sync/rw_spin_lock.h>
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#include <sync/spin_lock.h>
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#include <sys/debug.h>
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/* 0 is kpproc */
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static atomic_int pids = 1;
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struct proc* proc_from_elf (uint8_t* elf_contents) {
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struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
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struct proc* proc = malloc (sizeof (*proc));
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if (proc == NULL)
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return NULL;
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memset (proc, 0, sizeof (*proc));
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proc->lock = SPIN_LOCK_INIT;
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atomic_store (&proc->state, PROC_READY);
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proc->pid = atomic_fetch_add (&pids, 1);
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proc->procgroup = procgroup_create ();
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if (proc->procgroup == NULL) {
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free (proc);
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return NULL;
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}
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procgroup_attach (proc->procgroup, proc);
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uintptr_t kstack_paddr = pmm_alloc (KSTACK_SIZE / PAGE_SIZE);
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proc->pdata.kernel_stack = kstack_paddr + (uintptr_t)hhdm->offset + KSTACK_SIZE;
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procgroup_map (proc->procgroup, PROC_USTACK_TOP - USTACK_SIZE, USTACK_SIZE / PAGE_SIZE,
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MM_PG_USER | MM_PG_PRESENT | MM_PG_RW, NULL);
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proc->flags |= PROC_USTK_PREALLOC;
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struct elf_aux aux = proc_load_segments (proc, elf_contents);
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proc->pdata.regs.ss = GDT_UDATA | 0x03;
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proc->pdata.regs.rsp = (uint64_t)PROC_USTACK_TOP;
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proc->pdata.regs.rflags = 0x202;
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proc->pdata.regs.cs = GDT_UCODE | 0x03;
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proc->pdata.regs.rip = aux.entry;
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return proc;
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}
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struct proc* proc_clone (struct proc* proto, uintptr_t vstack_top, size_t stack_size,
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uintptr_t entry) {
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struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
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spin_lock_ctx_t ctxprt;
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struct proc* proc = malloc (sizeof (*proc));
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if (proc == NULL)
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return NULL;
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memset (proc, 0, sizeof (*proc));
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proc->lock = SPIN_LOCK_INIT;
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atomic_store (&proc->state, PROC_READY);
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proc->pid = atomic_fetch_add (&pids, 1);
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spin_lock (&proto->lock, &ctxprt);
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proc->procgroup = proto->procgroup;
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procgroup_attach (proc->procgroup, proc);
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spin_unlock (&proto->lock, &ctxprt);
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uintptr_t kstack_paddr = pmm_alloc (KSTACK_SIZE / PAGE_SIZE);
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proc->pdata.kernel_stack = kstack_paddr + (uintptr_t)hhdm->offset + KSTACK_SIZE;
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proc->pdata.regs.ss = GDT_UDATA | 0x03;
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proc->pdata.regs.rsp = (uint64_t)vstack_top;
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proc->pdata.regs.rflags = 0x202;
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proc->pdata.regs.cs = GDT_UCODE | 0x03;
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proc->pdata.regs.rip = (uint64_t)entry;
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return proc;
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}
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void proc_cleanup (struct proc* proc) {
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spin_lock_ctx_t ctxsq, ctxpr;
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spin_lock (&proc->lock, &ctxpr);
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/* clean suspension queue entries */
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struct list_node_link *sq_link, *sq_link_tmp;
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list_foreach (proc->sq_entries, sq_link, sq_link_tmp) {
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struct proc_sq_entry* sq_entry = list_entry (sq_link, struct proc_sq_entry, proc_link);
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struct proc_suspension_q* sq = sq_entry->sq;
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spin_lock (&sq->lock, &ctxsq);
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/* remove from sq's list */
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list_remove (sq->proc_list, &sq_entry->sq_link);
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/* remove from proc's list */
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list_remove (proc->sq_entries, &sq_entry->proc_link);
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spin_unlock (&sq->lock, &ctxsq);
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free (sq_entry);
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}
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spin_unlock (&proc->lock, &ctxpr);
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procgroup_detach (proc->procgroup, proc);
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pmm_free (proc->pdata.kernel_stack, KSTACK_SIZE / PAGE_SIZE);
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/* clean the process */
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free (proc);
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}
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