---

yaml --- r: 272056 b: refs/heads/master c: d3bf379 h: refs/heads/master v: v3
git-mirror · Oct 30, 2011 · 7e9aa38 · 7e9aa38
1 parent 7e8cd32
commit 7e9aa38
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Showing 4 changed files with 16 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3d214faea6e4f9b6018bf8589f4b245126349c0a
+refs/heads/master: d3bf37955d46718ee1a7f1fc69f953d2328ba7c2
diff --git a/trunk/Documentation/kernel-parameters.txt b/trunk/Documentation/kernel-parameters.txt
@@ -741,10 +741,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			See Documentation/block/cfq-iosched.txt and
 			Documentation/block/deadline-iosched.txt for details.
 
-	elfcorehdr=	[IA-64,PPC,SH,X86]
+	elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
 			Specifies physical address of start of kernel core
-			image elf header. Generally kexec loader will
-			pass this option to capture kernel.
+			image elf header and optionally the size. Generally
+			kexec loader will pass this option to capture kernel.
 			See Documentation/kdump/kdump.txt for details.
 
 	enable_mtrr_cleanup [X86]

diff --git a/trunk/include/linux/crash_dump.h b/trunk/include/linux/crash_dump.h
@@ -10,6 +10,7 @@
 #define ELFCORE_ADDR_ERR	(-2ULL)
 
 extern unsigned long long elfcorehdr_addr;
+extern unsigned long long elfcorehdr_size;
 
 extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
 						unsigned long, int);

diff --git a/trunk/kernel/crash_dump.c b/trunk/kernel/crash_dump.c
@@ -19,16 +19,27 @@ unsigned long saved_max_pfn;
  */
 unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
 
+/*
+ * stores the size of elf header of crash image
+ */
+unsigned long long elfcorehdr_size;
+
 /*
  * elfcorehdr= specifies the location of elf core header stored by the crashed
  * kernel. This option will be passed by kexec loader to the capture kernel.
+ *
+ * Syntax: elfcorehdr=[size[KMG]@]offset[KMG]
  */
 static int __init setup_elfcorehdr(char *arg)
 {
 	char *end;
 	if (!arg)
 		return -EINVAL;
 	elfcorehdr_addr = memparse(arg, &end);
+	if (*end == '@') {
+		elfcorehdr_size = elfcorehdr_addr;
+		elfcorehdr_addr = memparse(end + 1, &end);
+	}
 	return end > arg ? 0 : -EINVAL;
 }
 early_param("elfcorehdr", setup_elfcorehdr);