fix: corner case for x87 context restore on execve

[lunaix-os.git] / lunaix-os / includes / lunaix / process.h

diff --git a/lunaix-os/includes/lunaix/process.h b/lunaix-os/includes/lunaix/process.h
index 974907d0d56ebfc1bbbd8f550cd8c500a0ff8e48..1453e71634a72b5ee562f97131899693928ebb12 100644 (file)
--- a/lunaix-os/includes/lunaix/process.h
+++ b/lunaix-os/includes/lunaix/process.h
@@ -15,46 +15,76 @@
 // 虽然内核不是进程，但为了区分，这里使用Pid=-1来指代内核。这主要是方便物理页所有权检查。
 #define KERNEL_PID -1
 
 // 虽然内核不是进程，但为了区分，这里使用Pid=-1来指代内核。这主要是方便物理页所有权检查。
 #define KERNEL_PID -1
 

+/*
+    |C|Bk|De|Tn|Pu|Rn|
+         \----/
+            Dt
+
+    Group Dt: whether this process is terminated.
+
+    Rn: Running
+    Tn: Terminated
+    De: Destoryed
+    Pu: Paused
+    Bk: Blocked
+    C : Created
+*/
+

 #define PS_READY 0
 #define PS_RUNNING 1
 #define PS_TERMNAT 2
 #define PS_DESTROY 4
 #define PS_READY 0
 #define PS_RUNNING 1
 #define PS_TERMNAT 2
 #define PS_DESTROY 4

-#define PS_BLOCKED 8
-#define PS_CREATED 16
+#define PS_PAUSED 8
+#define PS_BLOCKED 16
+#define PS_CREATED 32

 
 

-#define PROC_TERMINATED(state) (state & 0x6)
+#define PS_GrBP (PS_PAUSED | PS_BLOCKED)
+#define PS_GrDT (PS_TERMNAT | PS_DESTROY)

 
 

-#define PROC_FINPAUSE 1
+#define proc_terminated(proc) (((proc)->state) & PS_GrDT)
+#define proc_hanged(proc) (((proc)->state) & PS_BLOCKED)
+#define proc_runnable(proc) (((proc)->state) & PS_PAUSED)

 
 

-struct proc_sigstate
+struct sigact

 {
 {

-    isr_param proc_regs;
-    char fxstate[512] __attribute__((aligned(16)));
+    struct sigact* prev;
+    sigset_t sa_mask;
+    void* sa_actor;
+    void* sa_handler;
+    pid_t sender;
+};
+
+struct sighail
+{
+    sigset_t sig_pending;
+    sigset_t sig_mask;
+    struct sigact* inprogress;
+    struct sigact signals[_SIG_NUM];

 };
 
 struct proc_sig
 {
 };
 
 struct proc_sig
 {

-    void* signal_handler;

     int sig_num;
     int sig_num;

-    struct proc_sigstate prev_context;
+    void* sigact;
+    void* sighand;
+    isr_param* saved_ictx;

 } __attribute__((packed));
 
 struct proc_info
 {
     /*
         Any change to *critical section*, including layout, size
 } __attribute__((packed));
 
 struct proc_info
 {
     /*
         Any change to *critical section*, including layout, size

-        must be reflected in kernel/asm/x86/interrupt.S to avoid
+        must be reflected in arch/x86/interrupt.S.inc to avoid

         disaster!
      */
 
     /* ---- critical section start ---- */
 
         disaster!
      */
 
     /* ---- critical section start ---- */
 

-    pid_t pid;                // offset = 0
-    struct proc_info* parent; // offset = 4
-    isr_param intr_ctx;       // offset = 8
-    ptr_t ustack_top;         // offset = 84 -> 56 -> 60
-    ptr_t page_table;         // offset = 88 -> 60 -> 64
-    void* fxstate;            // offset = 92 -> 64 -> 68
+    pid_t pid;
+    struct proc_info* parent;
+    isr_param* intr_ctx;
+    ptr_t ustack_top;
+    ptr_t page_table;

 
     /* ---- critical section end ---- */
 
 
     /* ---- critical section end ---- */
 


@@ -76,11 +106,7 @@ struct proc_info
     u8_t state;
     int32_t exit_code;
     int32_t k_status;
     u8_t state;
     int32_t exit_code;
     int32_t k_status;

-    sigset_t sig_pending;
-    sigset_t sig_mask;
-    sigset_t sig_inprogress;
-    int flags;
-    void* sig_handler[_SIG_NUM];
+    struct sighail sigctx;

     struct v_fdtable* fdtable;
     struct v_dnode* cwd;
     pid_t pgid;
     struct v_fdtable* fdtable;
     struct v_dnode* cwd;
     pid_t pgid;


@@ -94,6 +120,18 @@ block_current()
     __current->state = PS_BLOCKED;
 }
 
     __current->state = PS_BLOCKED;
 }
 

+static inline void
+pause_current()
+{
+    __current->state = PS_PAUSED;
+}
+
+static inline void
+resume_current()
+{
+    __current->state = PS_RUNNING;
+}
+

 /**
  * @brief 分配并初始化一个进程控制块
  *
 /**
  * @brief 分配并初始化一个进程控制块
  *


@@ -122,7 +160,7 @@ pid_t
 destroy_process(pid_t pid);
 
 void
 destroy_process(pid_t pid);
 
 void

-setup_proc_mem(struct proc_info* proc, ptr_t kstack_from);
+copy_kernel_stack(struct proc_info* proc, ptr_t kstack_from);

 
 /**
  * @brief 复制当前进程（LunaixOS的类 fork (unix) 实现）
 
 /**
  * @brief 复制当前进程（LunaixOS的类 fork (unix) 实现）


@@ -151,4 +189,10 @@ orphaned_proc(pid_t pid);
 struct proc_info*
 get_process(pid_t pid);
 
 struct proc_info*
 get_process(pid_t pid);
 

+void
+proc_setsignal(struct proc_info* proc, int signum);
+
+void
+proc_clear_signal(struct proc_info* proc);
+

 #endif /* __LUNAIX_PROCESS_H */
 #endif /* __LUNAIX_PROCESS_H */