[src/trunk]: src/sys/lib/libsa Improve comments.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d499ec7ec150
branches:  trunk
changeset: 827001:d499ec7ec150
user:      maxv <maxv%NetBSD.org@localhost>
date:      Sun Oct 08 13:51:31 2017 +0000

description:
Improve comments.

diffstat:

 sys/lib/libsa/loadfile_elf32.c |  19 ++++++++++---------
 1 files changed, 10 insertions(+), 9 deletions(-)

diffs (46 lines):

diff -r ace0e7eb0818 -r d499ec7ec150 sys/lib/libsa/loadfile_elf32.c
--- a/sys/lib/libsa/loadfile_elf32.c    Sun Oct 08 13:49:38 2017 +0000
+++ b/sys/lib/libsa/loadfile_elf32.c    Sun Oct 08 13:51:31 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: loadfile_elf32.c,v 1.44 2017/10/07 10:26:39 maxv Exp $ */
+/* $NetBSD: loadfile_elf32.c,v 1.45 2017/10/08 13:51:31 maxv Exp $ */
 
 /*
  * Copyright (c) 1997, 2008, 2017 The NetBSD Foundation, Inc.
@@ -265,19 +265,20 @@
 
 /* -------------------------------------------------------------------------- */
 
-#define KERNALIGN 4096
+#define KERNALIGN 4096 /* XXX should depend on marks[] */
 
 /*
  * Load a dynamic ELF binary into memory. Layout of the memory:
- * +------------+-----------------+-----------------+-----------------+
- * | ELF HEADER | SECTION HEADERS | KERNEL SECTIONS | SYMBOL SECTIONS |
- * +------------+-----------------+-----------------+-----------------+
+ * +------------+-----------------+-----------------+------------------+
+ * | ELF HEADER | SECTION HEADERS | KERNEL SECTIONS | SYM+REL SECTIONS |
+ * +------------+-----------------+-----------------+------------------+
  * The ELF HEADER start address is marks[MARK_END]. We then map the rest
  * by increasing maxp. An alignment is enforced between the code sections.
  *
- * The offsets of the SYMBOL SECTIONS are relative to the start address of the
- * ELF HEADER. We just give the kernel a pointer to the ELF HEADER, and we let
- * the kernel find the location and number of symbols by itself.
+ * The offsets of the KERNEL and SYM+REL sections are relative to the start
+ * address of the ELF HEADER. We just give the kernel a pointer to the ELF
+ * HEADER, and we let the kernel find the location and number of symbols by
+ * itself.
  */
 static int
 ELFNAMEEND(loadfile_dynamic)(int fd, Elf_Ehdr *elf, u_long *marks, int flags)
@@ -383,7 +384,7 @@
        }
 
        /*
-        * Load the SYMBOL SECTIONS.
+        * Load the SYM+REL SECTIONS.
         */
        maxp = roundup(maxp, ELFROUND);
        for (i = 0; i < elf->e_shnum; i++) {