feat: added ability to identify process vm regions

[lunaix-os.git] / lunaix-os / kernel / asm / x86 / interrupts.c

diff --git a/lunaix-os/kernel/asm/x86/interrupts.c b/lunaix-os/kernel/asm/x86/interrupts.c
index f6b55389ae68d8e43fd35db574f93301cdfb7528..09bd1eb1409cfdcf18a78a64784739112f30107e 100644 (file)
--- a/lunaix-os/kernel/asm/x86/interrupts.c
+++ b/lunaix-os/kernel/asm/x86/interrupts.c
@@ -5,6 +5,8 @@
 #include <lunaix/tty/tty.h>
 #include <lunaix/process.h>
 #include <lunaix/sched.h>
+#include <lunaix/mm/page.h>
+#include <lunaix/mm/vmm.h>
 
 LOG_MODULE("intr")
 
@@ -29,6 +31,7 @@ intr_set_fallback_handler(int_subscriber subscribers) {
     fallback = subscribers;
 }
 
+extern x86_page_table* __kernel_ptd;
 
 void
 intr_handler(isr_param* param)
@@ -37,25 +40,32 @@ intr_handler(isr_param* param)
     //     kprintf(KDEBUG "%p", param->registers.esp);
     // }
     __current->intr_ctx = *param;
+
+    cpu_lcr3(__kernel_ptd);
+
+    // 将当前进程的页目录挂载到内核地址空间里（页目录挂载点#1），方便访问。
+    vmm_mount_pd(PD_MOUNT_1, __current->page_table);
+
+    isr_param *lparam = &__current->intr_ctx;
     
-    if (param->vector <= 255) {
-        int_subscriber subscriber = subscribers[param->vector];
+    if (lparam->vector <= 255) {
+        int_subscriber subscriber = subscribers[lparam->vector];
         if (subscriber) {
-            subscriber(param);
+            subscriber(lparam);
             goto done;
         }
     }
 
     if (fallback) {
-        fallback(param);
+        fallback(lparam);
         goto done;
     }
     
     kprint_panic("INT %u: (%x) [%p: %p] Unknown",
-            param->vector,
-            param->err_code,
-            param->cs,
-            param->eip);
+            lparam->vector,
+            lparam->err_code,
+            lparam->cs,
+            lparam->eip);
 
 done:
 
@@ -65,10 +75,12 @@ done:
 
     // for all external interrupts except the spurious interrupt
     //  this is required by Intel Manual Vol.3A, section 10.8.1 & 10.8.5
-    if (param->vector >= EX_INTERRUPT_BEGIN && param->vector != APIC_SPIV_IV) {
+    if (lparam->vector >= EX_INTERRUPT_BEGIN && lparam->vector != APIC_SPIV_IV) {
         apic_done_servicing();
     }
 
+    cpu_lcr3(__current->page_table);
+
     *param = __current->intr_ctx;
 
     return;