Imperial-MEng/pintos_22
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Implement page fault for lazy loading executables, w/ G

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This commit is contained in:
sBubshait
2024-11-28 20:03:50 +00:00
parent df20e0fdfe
commit 801fd7d310
136 changed files with 15097 additions and 5 deletions
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9
src/userprog/process.c
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@@ -119,7 +119,7 @@ process_execute (const char *cmd)
static void *get_usr_kpage (enum palloc_flags flags, void *upage);
static void free_usr_kpage (void *kpage);
static bool install_page (void *upage, void *kpage, bool writable);
bool install_page (void *upage, void *kpage, bool writable);
static bool process_init_stack (char *cmd_saveptr, void **esp, char *file_name);
static void *push_to_stack (void **esp, void *data, size_t data_size);
@@ -707,11 +707,12 @@ load_segment (struct file *file, off_t ofs, uint8_t *upage,
size_t page_zero_bytes = PGSIZE - page_read_bytes;
/* Add the page to the SPT */
if (page_insert (file, ofs, upage, read_bytes, zero_bytes, writable,
PAGE_EXECUTABLE) == NULL)
if (page_insert (file, ofs, upage, page_read_bytes, page_zero_bytes,
writable, PAGE_EXECUTABLE) == NULL)
return false;
/* Advance. */
ofs += page_read_bytes;
read_bytes -= page_read_bytes;
zero_bytes -= page_zero_bytes;
upage += PGSIZE;
@@ -782,7 +783,7 @@ free_usr_kpage (void *kpage)
with palloc_get_page().
Returns true on success, false if UPAGE is already mapped or
if memory allocation fails. */
static bool
bool
install_page (void *upage, void *kpage, bool writable)
{
struct thread *t = thread_current ();