Changeset 651 for trunk/kernel/libk

Timestamp:

Nov 14, 2019, 11:50:09 AM (4 years ago)

Author:

alain

Message:

1) Improve the VMM MMAP allocator: implement the "buddy" algorithm
to allocate only aligned blocks.
2) fix a bug in the pthread_join() / pthread_exit() mmechanism.

Location:

trunk/kernel/libk

Files:

• elf.c (modified) (2 diffs)
• list.h (modified) (1 diff)
• user_dir.h (modified) (2 diffs)

trunk/kernel/libk/elf.c

@@ -216 +216 @@
                           process_t * process )
 {
+    uint32_t     new_offset;       // unused, required by vfs_lseek() 
         kmem_req_t   req;              // kmem request for program header
         Elf_Ehdr     header;           // local buffer for .elf header
@@ -274 +275 @@
 
         // set seek pointer in file descriptor to access segment descriptors array
-        error = vfs_lseek( file_xp , header.e_phoff, SEEK_SET , NULL );
+        error = vfs_lseek( file_xp , header.e_phoff, SEEK_SET , &new_offset );
 
         if( error )

trunk/kernel/libk/list.h

@@ -61 +61 @@
 
 /***************************************************************************
- * This macro return an uint32_t that is the offset (number of bytes)
+ * This macro return an intptr_t that is the offset (number of bytes)
  * of a field in a structure.
+ ***************************************************************************
  * @ type   : structure type
  * @ member : name of the field

trunk/kernel/libk/user_dir.h

@@ -37 +37 @@
  * - An user process open a directory by calling the "opendir()" syscall.
  *   The user_dir_create() function allocates physical memory to create in the cluster
- *   containing the target inode one or several physical pages to implement an array 
- *   of "dirent", mapped in the user process space as an ANON vseg. It allocates also
- *   an "user_dir_t" descriptor structure defined below, registered in the xlist rooted 
- *   in the reference user process descriptor. 
+ *   containing the directory inode one or several physical pages to implement an array 
+ *   of "dirent". This array is mapped in the user process space as an ANON vseg.
+ *   It allocates also an "user_dir_t" descriptor structure defined below, registered
+ *   in the xlist rooted in the reference user process descriptor. 
  * - This "user_dir_t" structure contains the total number of "entries", the "current" 
  *   pointer used by the readdir() syscall, and an "ident" field, that is actually
@@ -104 +104 @@
  * structures rooted in the reference process descriptor, release all memory
  * allocated for the user_dir_t struct in the directory inode cluster, including 
- * the dirent array, and delete all ANON vseg copies in all process VMM copies,
+ * the dirent array, and delete the ANON vseg copies in all process VMM copies,
  * using parallel RPCs.
  * It must be executed by a thread running in the cluster containing the target inode.