move constants to api. centralize interrupts. fix rootdir lock hang

7 files changed, 33 insertions, 48 deletions

diff --git a/arch/x86_64/hal/idt.c b/arch/x86_64/hal/idt.c
index b2251bd..235d8c6 100644
--- a/arch/x86_64/hal/idt.c
+++ b/arch/x86_64/hal/idt.c
@@ -3,6 +3,7 @@
 #include "gdt.h"
 #include "jove.h"
 #include "lib/printf.h"
+#include "lib/string.h"
 
 ALIGN(8)
 static struct idt_entry s_idt[IDT_ENTRIES];
@@ -11,7 +12,9 @@ typedef void (*isr_t)(void);
 extern isr_t __isrs[IDT_ENTRIES];
 
 typedef struct int_stackframe *(*int_handler_t)(struct int_stackframe*);
-int_handler_t __int_handles[IDT_ENTRIES];
+int_handler_t __int_kernel_handles[IDT_ENTRIES];
+
+struct int_user_handle __int_user_handles[IDT_ENTRIES];
 
 static struct int_stackframe*
 s_int_handle_stub(struct int_stackframe* frame)
@@ -20,9 +23,22 @@ s_int_handle_stub(struct int_stackframe* frame)
     hcf();
 }
 
+struct int_stackframe*
+__int_handle_body(struct int_stackframe *frame)
+{
+    frame = __int_kernel_handles[frame->int_num](frame);
+    
+    struct int_user_handle *usr_handle = &__int_user_handles[frame->int_num];
+    if(usr_handle->pid == 0) return frame;
+
+    kprintf("TODO: Handle user interrupt switching\n");
+    return frame;
+}
+
 void
 idt_init(void)
 {
+    memset(__int_user_handles, 0, sizeof(struct int_user_handle) * IDT_ENTRIES);
     for(size_t i = 0; i < IDT_ENTRIES; i++) {
         uintptr_t isr = (uintptr_t)(__isrs[i]);
 
@@ -37,7 +53,7 @@ idt_init(void)
             .offset_32_63 = (uint32_t)(isr >> 32)
         };
 
-        __int_handles[i] = s_int_handle_stub;
+        __int_kernel_handles[i] = s_int_handle_stub;
     }
 }
 
diff --git a/arch/x86_64/hal/idt.h b/arch/x86_64/hal/idt.h
index 961e720..2aa759b 100644
--- a/arch/x86_64/hal/idt.h
+++ b/arch/x86_64/hal/idt.h
@@ -63,4 +63,11 @@ struct int_stackframe
 #define IDT_EXCEPT_VE 20
 #define IDT_EXCEPT_CP 21
 
+struct int_user_handle
+{
+    uintmax_t pid;
+    void *handle;
+};
+extern struct int_user_handle __int_user_handles[IDT_ENTRIES];
+
 #endif
diff --git a/arch/x86_64/hal/idt_entries.s b/arch/x86_64/hal/idt_entries.s
index 204fa93..0bed23d 100644
--- a/arch/x86_64/hal/idt_entries.s
+++ b/arch/x86_64/hal/idt_entries.s
@@ -42,18 +42,15 @@
 1:
 .endm
 
-.extern __int_handles
+.extern __int_handle_body
 .type __isr_header @function
 __isr_header:
     push_state
     cld
 
     movq %rsp, %rdi
-
-isr_break:
-    movq 0x78(%rdi), %rax
-    movq __int_handles(,%rax,8), %rbx
-    call %rbx
+    call __int_handle_body
+    movq %rax, %rsp
 
     pop_state
     addq $16, %rsp
diff --git a/arch/x86_64/hal/obj.c b/arch/x86_64/hal/obj.c
index b8924a6..af0491a 100644
--- a/arch/x86_64/hal/obj.c
+++ b/arch/x86_64/hal/obj.c
@@ -1,5 +1,6 @@
 #include "obj.h"
 #include "arch/x86_64/lock.h"
+#include "lib/printf.h"
 #include "paging.h"
 #include "hal/obj.h"
 #include "jove.h"
diff --git a/arch/x86_64/hal/obj.h b/arch/x86_64/hal/obj.h
index 8955a55..deea2be 100644
--- a/arch/x86_64/hal/obj.h
+++ b/arch/x86_64/hal/obj.h
@@ -36,40 +36,4 @@ typedef struct jove_locked_obj
 #define JOVE_OBJDIR_SIZE 0x1000
 #define JOVE_OBJDIR_ENTRIES (JOVE_OBJDIR_SIZE / sizeof(jove_obj_t))
 
-typedef struct jove_objdir
-{
-    jove_obj_t entries[JOVE_OBJDIR_ENTRIES];
-} jove_objdir_t;
-/*Locks the mutex of the kernel object provided. Returns the locked version. */
-jove_owned_obj_t *obj_take(jove_obj_t *obj);
-/*Unlocks the mutex of the kernel object provided. Returns the unlocked version. */
-jove_obj_t *obj_release(jove_owned_obj_t *obj);
-
-/*Converts the value pointer of the object into a pointer to kernel memory.*/
-void *obj_deref(jove_owned_obj_t *obj);
-
-/*Getters and setters for accessing the type field of the kernel object. */
-uint8_t obj_gettype(jove_owned_obj_t *obj);
-uint8_t obj_peektype(jove_obj_t obj);
-void obj_settype(jove_owned_obj_t *obj, uint8_t type);
-
-/*Getters and setters for accessing the value field of the kernel object. */
-uintmax_t obj_getvalue(jove_owned_obj_t *obj);
-void obj_setvalue(jove_owned_obj_t *obj, uintmax_t value);
-
-/*Returns the n'th entry of the object directory passed.
- * If the passed object is not an objdir, returns NULL and sets errno to EBADOBJ.
- * If the passed entry index is out of bounds, returns NULL and sets errno to EOOB.*/
-jove_owned_obj_t *objdir_getlocal(jove_owned_obj_t *objdir_obj, uint16_t entry);
-jove_obj_t objdir_peeklocal(jove_owned_obj_t *objdir_obj, uint16_t entry);
-
-/*Recursively seeks through an object directory for an object following the passed
- * path variable.
- * If the path length is zero, returns the passed object.
- * If the passed object is not an objdir, returns NULL and sets errno to EBADOBJ.
- * If any object excluding the object at the end of the path is not an objdir,
- * returns NULL and sets errno to EBADOBJ.
- * If any entry in the path is out of bounds, returns NULL and sets errno to EBADOBJ.*/
-jove_owned_obj_t *objdir_getobj(jove_owned_obj_t *objdir_obj, const uint16_t *path, size_t path_len);
-
 #endif
diff --git a/arch/x86_64/hal/paging.c b/arch/x86_64/hal/paging.c
index 507dfce..7b45005 100644
--- a/arch/x86_64/hal/paging.c
+++ b/arch/x86_64/hal/paging.c
@@ -251,6 +251,6 @@ paging_pml4_init(void)
 
     /*Before tasking, if the kernel has a bug and crashes we need some
      * information about what happened.*/
-    extern struct int_stackframe *(*__int_handles[])(struct int_stackframe*);
-    __int_handles[IDT_EXCEPT_PF] = s_int_handle_pf_early;
+    extern struct int_stackframe *(*__int_kernel_handles[])(struct int_stackframe*);
+    __int_kernel_handles[IDT_EXCEPT_PF] = s_int_handle_pf_early;
 }
diff --git a/arch/x86_64/hal/process.c b/arch/x86_64/hal/process.c
index c766a28..0155919 100644
--- a/arch/x86_64/hal/process.c
+++ b/arch/x86_64/hal/process.c
@@ -49,15 +49,15 @@ processing_setup(void (*process_main))
     s_init_pcb->pid = 1;
     s_init_pcb->ksp = (void*)ksp;
     s_init_pcb->pml4 = paging_get_pml4();
-    s_init_pcb->rootdir = obj_take(_rootdir_obj);
+    s_init_pcb->rootdir = _rootdir_obj;
 
     jove_owned_obj_t *iopb_obj = objdir_getlocal(_rootdir_obj, ROOTDIR_IOPB_I);
     obj_settype(iopb_obj, JOVE_OBJ_IOPB);
     obj_setvalue(iopb_obj, (uintptr_t)s_init_iopb);
+    s_init_pcb->iopb = iopb_obj;
 
     processor_t *proc = processor_current();
     proc->tss.rsp[0] = (uintptr_t)s_init_pcb->ksp;
-
     memcpy(proc->iopb, s_init_iopb, 0x2000);
 
     {