working usermode pager. fix usermode interrupts

1 files changed, 41 insertions, 17 deletions

diff --git a/arch/x86_64/syscall-invoke-mapping.c b/arch/x86_64/syscall-invoke-mapping.c
index efecbdf..5b79239 100644
--- a/arch/x86_64/syscall-invoke-mapping.c
+++ b/arch/x86_64/syscall-invoke-mapping.c
@@ -4,6 +4,9 @@
 #include <stddef.h>
 #include "error.h"
 #include "lock.h"
+#include "string.h"
+#include "memory.h"
+#include "print.h"
 
 static int
 s_handle_invoke_mapping_release(
@@ -13,6 +16,9 @@ s_handle_invoke_mapping_release(
         size_t payload_at
         )
 {
+#ifdef DBG_SYSCALL
+    klogf("release mapping %p\n", target_entry);
+#endif
     target_entry->data = 0;
     target_entry->type = KO_NONE;
     return 0;
@@ -29,25 +35,29 @@ s_handle_invoke_mapping_get(
     pmli_t pmli;
     SYSCALL_PAYLOAD_TAKEL(payload, payload_at, pmli, pmli_t);
 
-    if(pmli > 511) return -KE_OOB;
+    if(pmli > 511) return KE_OOB;
 
     uint8_t level = target_entry->data & 3;
     pmle_t *target_pml = (pmle_t*)vmem_phys_tovirt(target_entry->data & ~3ULL);
-    if(level == 3 && pmli > 255) return -KE_OOB;
-    if(level == 0) return -KE_BADOBJ;
-    
+    if(level == 3 && pmli > 255) return KE_OOB;
+    if(level < 0) return KE_BADOBJ;
+
     size_t dest_pathw;
     objdir_entry_t *dest_entry;
     SYSCALL_PAYLOAD_TAKEOBJ(payload, payload_at, dest_pathw, dest_entry);
-    if(dest_entry->type != KO_NONE) return -KE_FULL;
+
+    if(dest_entry->type != KO_NONE) return KE_FULL;
 
     pmle_t pmle = target_pml[pmli];
-    if(!pmle.p) return -KE_DNE;
+    if(!pmle.p) return KE_DNE;
 
     *dest_entry = (objdir_entry_t) {
         .type = KO_MEMORY_MAPPING,
         .data = (((uintptr_t)target_pml[pmli].paddr) << 12ULL) | (level - 1)
     };
+#ifdef DBG_SYSCALL
+    klogf("Get pml%i %p[%i] -> %p\n", level, target_pml, pmli, dest_entry->data & ~3ULL);
+#endif
     return 0;
 }
 
@@ -65,37 +75,47 @@ s_handle_invoke_mapping_map(
     pmli_t pmli;
     SYSCALL_PAYLOAD_TAKEL(payload, payload_at, pmli, pmli_t);
 
-    if(pmli > 511) return -KE_OOB;
-    if(level == 3 && pmli > 255) return -KE_OOB;
+    if(pmli > 511) return KE_OOB;
+    if(level == 3 && pmli > 255) return KE_OOB;
+    if(level < 0) return KE_BADOBJ;
 
     size_t untyped_pathw;
     objdir_entry_t *untyped_entry;
     SYSCALL_PAYLOAD_TAKEOBJ(payload, payload_at, untyped_pathw, untyped_entry);
     
-    if(untyped_entry->type != KO_MEMORY_UNTYPED) return -KE_BADOBJ;
+    if(untyped_entry->type != KO_MEMORY_UNTYPED) return KE_BADOBJ;
     mtx_acquire(&untyped_entry->lock);
 
     if((untyped_entry->data & 0xFFF) != 0) {
         mtx_release(&untyped_entry->lock);
-        return -KE_ALIGN;
+        return KE_ALIGN;
     }
-    size_t *untyped_data = (size_t*)untyped_entry->data;
-    size_t untyped_size = *untyped_data;
+
+    uintptr_t untyped_phys = untyped_entry->data;
+    size_t *untyped = ko_entry_data(untyped_entry);
+    size_t untyped_size = *untyped;
     if(untyped_size != 0x1000) {
         mtx_release(&untyped_entry->lock);
-        return -KE_BADSIZE;
+        return KE_BADSIZE;
     }
 
     pmle_t pmle = target_pml[pmli];
     if(pmle.p) {
         mtx_release(&untyped_entry->lock);
-        return -KE_OCCUPIED;
+        return KE_OCCUPIED;
     }
     
-    target_pml[pmli].value = vmem_ident_tophys((void*)untyped_entry->data) | PAGE_RW | PAGE_US | PAGE_PRESENT;
+    target_pml[pmli].value = untyped_phys | PAGE_RW | PAGE_US | PAGE_PRESENT;
+    if(level != 0) {
+        memset(untyped, 0, 0x1000);
+    }
     untyped_entry->type = KO_MEMORY_MAPPING;
     untyped_entry->data |= level - 1;
 
+#ifdef DBG_SYSCALL
+    klogf("map %p[%p] to pml%i %p[%i]\n", untyped_entry, untyped_phys, level, target_pml, pmli);
+#endif
+
     mtx_release(&untyped_entry->lock);
     return 0;
 }
@@ -119,6 +139,10 @@ syscall_handle_invoke_mapping(
     uint8_t funcid;
     SYSCALL_PAYLOAD_TAKEL(payload, payload_at, funcid, uint8_t);
 
-    if(funcid >= s_invoke_handles_count) return -KE_BADFUNC;
-    return s_invoke_handles[funcid](root_dir, target, payload, payload_at);
+    if(funcid >= s_invoke_handles_count) return KE_BADFUNC;
+    int r = s_invoke_handles[funcid](root_dir, target, payload, payload_at);
+#ifdef DBG_SYSCALL
+    klogf("Call returns %i\n", r);
+#endif
+    return r;
 }