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- #ifndef __KERN_PROCESS_PROC_H__
- #define __KERN_PROCESS_PROC_H__
-
- #include <defs.h>
- #include <list.h>
- #include <trap.h>
- #include <memlayout.h>
-
-
- // process's state in his life cycle
- enum proc_state {
- PROC_UNINIT = 0, // uninitialized
- PROC_SLEEPING, // sleeping
- PROC_RUNNABLE, // runnable(maybe running)
- PROC_ZOMBIE, // almost dead, and wait parent proc to reclaim his resource
- };
-
- // Saved registers for kernel context switches.
- // Don't need to save all the %fs etc. segment registers,
- // because they are constant across kernel contexts.
- // Save all the regular registers so we don't need to care
- // which are caller save, but not the return register %eax.
- // (Not saving %eax just simplifies the switching code.)
- // The layout of context must match code in switch.S.
- struct context {
- uint32_t eip;
- uint32_t esp;
- uint32_t ebx;
- uint32_t ecx;
- uint32_t edx;
- uint32_t esi;
- uint32_t edi;
- uint32_t ebp;
- };
-
- #define PROC_NAME_LEN 15
- #define MAX_PROCESS 4096
- #define MAX_PID (MAX_PROCESS * 2)
-
- extern list_entry_t proc_list;
-
- struct proc_struct {
- enum proc_state state; // Process state
- int pid; // Process ID
- int runs; // the running times of Proces
- uintptr_t kstack; // Process kernel stack
- volatile bool need_resched; // bool value: need to be rescheduled to release CPU?
- struct proc_struct *parent; // the parent process
- struct mm_struct *mm; // Process's memory management field
- struct context context; // Switch here to run process
- struct trapframe *tf; // Trap frame for current interrupt
- uintptr_t cr3; // CR3 register: the base addr of Page Directroy Table(PDT)
- uint32_t flags; // Process flag
- char name[PROC_NAME_LEN + 1]; // Process name
- list_entry_t list_link; // Process link list
- list_entry_t hash_link; // Process hash list
- int exit_code; // exit code (be sent to parent proc)
- uint32_t wait_state; // waiting state
- struct proc_struct *cptr, *yptr, *optr; // relations between processes
- };
-
- #define PF_EXITING 0x00000001 // getting shutdown
-
- #define WT_CHILD (0x00000001 | WT_INTERRUPTED)
- #define WT_INTERRUPTED 0x80000000 // the wait state could be interrupted
-
-
- #define le2proc(le, member) \
- to_struct((le), struct proc_struct, member)
-
- extern struct proc_struct *idleproc, *initproc, *current;
-
- void proc_init(void);
- void proc_run(struct proc_struct *proc);
- int kernel_thread(int (*fn)(void *), void *arg, uint32_t clone_flags);
-
- char *set_proc_name(struct proc_struct *proc, const char *name);
- char *get_proc_name(struct proc_struct *proc);
- void cpu_idle(void) __attribute__((noreturn));
-
- struct proc_struct *find_proc(int pid);
- int do_fork(uint32_t clone_flags, uintptr_t stack, struct trapframe *tf);
- int do_exit(int error_code);
- int do_yield(void);
- int do_execve(const char *name, size_t len, unsigned char *binary, size_t size);
- int do_wait(int pid, int *code_store);
- int do_kill(int pid);
- #endif /* !__KERN_PROCESS_PROC_H__ */
-
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