5 files changed, 38 insertions, 68 deletions

diff --git a/kexec/Makefile b/kexec/Makefile
index 39f365f..2b4fb3d 100644
--- a/kexec/Makefile
+++ b/kexec/Makefile
@@ -26,6 +26,7 @@ KEXEC_SRCS_base += kexec/kernel_version.c
 KEXEC_SRCS_base += kexec/lzma.c
 KEXEC_SRCS_base += kexec/zlib.c
 KEXEC_SRCS_base += kexec/kexec-xen.c
+KEXEC_SRCS_base += kexec/symbols.c
 
 KEXEC_GENERATED_SRCS += $(PURGATORY_HEX_C)
 
diff --git a/kexec/arch/arm/crashdump-arm.c b/kexec/arch/arm/crashdump-arm.c
index ac76e0a..daa4788 100644
--- a/kexec/arch/arm/crashdump-arm.c
+++ b/kexec/arch/arm/crashdump-arm.c
@@ -73,48 +73,10 @@ static struct crash_elf_info elf_info = {
 
 extern unsigned long long user_page_offset;
 
-/* Retrieve kernel _stext symbol virtual address from /proc/kallsyms */
-static unsigned long long get_kernel_stext_sym(void)
-{
-	const char *kallsyms = "/proc/kallsyms";
-	const char *stext = "_stext";
-	char sym[128];
-	char line[128];
-	FILE *fp;
-	unsigned long long vaddr = 0;
-	char type;
-
-	fp = fopen(kallsyms, "r");
-	if (!fp) {
-		fprintf(stderr, "Cannot open %s\n", kallsyms);
-		return 0;
-	}
-
-	while(fgets(line, sizeof(line), fp) != NULL) {
-		unsigned long long addr;
-
-		if (sscanf(line, "%Lx %c %s", &addr, &type, sym) != 3)
-			continue;
-
-		if (strcmp(sym, stext) == 0) {
-			dbgprintf("kernel symbol %s vaddr = %#llx\n", stext, addr);
-			vaddr = addr;
-			break;
-		}
-	}
-
-	fclose(fp);
-
-	if (vaddr == 0)
-		fprintf(stderr, "Cannot get kernel %s symbol address\n", stext);
-
-	return vaddr;
-}
-
 static int get_kernel_page_offset(struct kexec_info *info,
 		struct crash_elf_info *elf_info)
 {
-	unsigned long long stext_sym_addr = get_kernel_stext_sym();
+	unsigned long long stext_sym_addr = get_kernel_sym("_stext");
 	if (stext_sym_addr == 0) {
 		if (user_page_offset != (-1ULL)) {
 			elf_info->page_offset = user_page_offset;
diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
index 285dea9..69a063a 100644
--- a/kexec/arch/i386/crashdump-x86.c
+++ b/kexec/arch/i386/crashdump-x86.c
@@ -102,35 +102,6 @@ static int get_kernel_paddr(struct kexec_info *UNUSED(info),
 	return -1;
 }
 
-/* Retrieve kernel symbol virtual address from /proc/kallsyms */
-static unsigned long long get_kernel_sym(const char *symbol)
-{
-	const char *kallsyms = "/proc/kallsyms";
-	char sym[128];
-	char line[128];
-	FILE *fp;
-	unsigned long long vaddr;
-	char type;
-
-	fp = fopen(kallsyms, "r");
-	if (!fp) {
-		fprintf(stderr, "Cannot open %s\n", kallsyms);
-		return 0;
-	}
-
-	while(fgets(line, sizeof(line), fp) != NULL) {
-		if (sscanf(line, "%llx %c %s", &vaddr, &type, sym) != 3)
-			continue;
-		if (strcmp(sym, symbol) == 0) {
-			dbgprintf("kernel symbol %s vaddr = %16llx\n", symbol, vaddr);
-			return vaddr;
-		}
-	}
-
-	dbgprintf("Cannot get kernel %s symbol address\n", symbol);
-	return 0;
-}
-
 /* Retrieve info regarding virtual address kernel has been compiled for and
  * size of the kernel from /proc/kcore. Current /proc/kcore parsing from
  * from kexec-tools fails because of malformed elf notes. A kernel patch has
diff --git a/kexec/kexec.h b/kexec/kexec.h
index 52bef9b..26225d2 100644
--- a/kexec/kexec.h
+++ b/kexec/kexec.h
@@ -317,4 +317,6 @@ int xen_kexec_unload(uint64_t kexec_flags);
 void xen_kexec_exec(void);
 int xen_kexec_status(uint64_t kexec_flags);
 
+extern unsigned long long get_kernel_sym(const char *text);
+
 #endif /* KEXEC_H */
diff --git a/kexec/symbols.c b/kexec/symbols.c
new file mode 100644
index 0000000..e88f7f3
--- /dev/null
+++ b/kexec/symbols.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <string.h>
+#include "kexec.h"
+
+/* Retrieve kernel symbol virtual address from /proc/kallsyms */
+unsigned long long get_kernel_sym(const char *symbol)
+{
+	const char *kallsyms = "/proc/kallsyms";
+	char sym[128];
+	char line[128];
+	FILE *fp;
+	unsigned long long vaddr;
+	char type;
+
+	fp = fopen(kallsyms, "r");
+	if (!fp) {
+		fprintf(stderr, "Cannot open %s\n", kallsyms);
+		return 0;
+	}
+
+	while (fgets(line, sizeof(line), fp) != NULL) {
+		if (sscanf(line, "%llx %c %s", &vaddr, &type, sym) != 3)
+			continue;
+		if (strcmp(sym, symbol) == 0) {
+			dbgprintf("kernel symbol %s vaddr = %16llx\n",
+					symbol, vaddr);
+			return vaddr;
+		}
+	}
+
+	dbgprintf("Cannot get kernel %s symbol address\n", symbol);
+
+	return 0;
+}