Changeset 567807b1 in mainline for arch/amd64/src/mm/page.c

Timestamp:

2006-05-24T17:03:29Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8d6bc2d5

Parents:

82da5f5

Message:

Modify the hierarchy of page fault handlers to pass access mode that caused the fault.
Architectures are required to pass either PF_ACCESS_READ, PF_ACCESS_WRITE or PF_ACCESS_EXEC
to as_page_fault(), depending on the cause of the fault.

File:

• arch/amd64/src/mm/page.c (modified) (1 diff)

arch/amd64/src/mm/page.c

@@ -169 +169 @@
 {
         __address page;
+        pf_access_t access;
         
         page = read_cr2();
-        if (as_page_fault(page, istate) == AS_PF_FAULT) {
+        
+        if (istate->error_word & PFERR_CODE_RSVD)
+                panic("Reserved bit set in page table entry.\n");
+        
+        if (istate->error_word & PFERR_CODE_RW)
+                access = PF_ACCESS_WRITE;
+        else if (istate->error_word & PFERR_CODE_ID)
+                access = PF_ACCESS_EXEC;
+        else
+                access = PF_ACCESS_READ;
+        
+        if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
                 print_info_errcode(n, istate);
                 printf("Page fault address: %llX\n", page);