grub2/0171-print-more-debug-info-in-our-module-loader.patch

From 0d0a7ebbed42b97fca63cbcaf85a469b77c76fda Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 1 May 2017 11:19:40 -0400
Subject: [PATCH 171/243] print more debug info in our module loader.

Signed-off-by: Peter Jones <pjones@redhat.com>
---
 grub-core/kern/efi/efi.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 684ca93f8f4..866fc20e162 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -304,13 +304,23 @@ grub_efi_modules_addr (void)
     }
 
   if (i == coff_header->num_sections)
-    return 0;
+    {
+      grub_dprintf("sections", "section %d is last section; invalid.\n", i);
+      return 0;
+    }
 
   info = (struct grub_module_info *) ((char *) image->image_base
 				      + section->virtual_address);
-  if (info->magic != GRUB_MODULE_MAGIC)
-    return 0;
+  if (section->name[0] != '.' && info->magic != GRUB_MODULE_MAGIC)
+    {
+      grub_dprintf("sections",
+		   "section %d has bad magic %08x, should be %08x\n",
+		   i, info->magic, GRUB_MODULE_MAGIC);
+      return 0;
+    }
 
+  grub_dprintf("sections", "returning section info for section %d: \"%s\"\n",
+	       i, section->name);
   return (grub_addr_t) info;
 }
 
-- 
2.17.1