summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--kexec/Makefile1
-rw-r--r--kexec/arch/i386/crashdump-x86.c61
-rw-r--r--kexec/arch/i386/kexec-x86.c2
-rw-r--r--kexec/arch/ia64/kexec-ia64.c1
-rw-r--r--kexec/arch/ppc/kexec-ppc.c1
-rw-r--r--kexec/arch/x86_64/crashdump-x86_64.c49
-rw-r--r--kexec/arch/x86_64/kexec-x86_64.c1
-rw-r--r--kexec/crashdump.c65
-rw-r--r--kexec/crashdump.h9
-rw-r--r--kexec/kexec.h1
10 files changed, 107 insertions, 84 deletions
diff --git a/kexec/Makefile b/kexec/Makefile
index 812da81..284b1e8 100644
--- a/kexec/Makefile
+++ b/kexec/Makefile
@@ -15,6 +15,7 @@ KEXEC_C_SRCS+= kexec/kexec-elf.c
KEXEC_C_SRCS+= kexec/kexec-elf-exec.c
KEXEC_C_SRCS+= kexec/kexec-elf-rel.c
KEXEC_C_SRCS+= kexec/kexec-elf-boot.c
+KEXEC_C_SRCS+= kexec/crashdump.c
KEXEC_C_SRCS+= $(PURGATORY_HEX_C)
KEXEC_S_SRCS:=
include kexec/arch/$(ARCH)/Makefile
diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
index 9553faf..03995d8 100644
--- a/kexec/arch/i386/crashdump-x86.c
+++ b/kexec/arch/i386/crashdump-x86.c
@@ -29,12 +29,11 @@
#include "../../kexec.h"
#include "../../kexec-elf.h"
#include "../../kexec-syscall.h"
+#include "../../crashdump.h"
#include "kexec-x86.h"
#include "crashdump-x86.h"
#include <x86/x86-linux.h>
-#define MAX_LINE 160
-
extern struct arch_options_t arch_options;
/* Forward Declaration. */
@@ -429,41 +428,36 @@ static int cmdline_add_elfcorehdr(char *cmdline, unsigned long addr)
return 0;
}
-/* Returns the virtual address of start of crash notes buffer for a cpu. */
-static int get_crash_notes_section_addr(int cpu, unsigned long long *addr)
+
+/*
+ * This routine is specific to i386 architecture to maintain the
+ * backward compatibility, other architectures can use the per
+ * cpu version get_crash_notes_per_cpu() directly.
+ */
+static int get_crash_notes(int cpu, uint64_t *addr)
{
-#define MAX_SYSFS_PATH_LEN 70
- char crash_notes[MAX_SYSFS_PATH_LEN];
+ char crash_notes[PATH_MAX];
char line[MAX_LINE];
FILE *fp;
- struct stat cpu_stat;
+ unsigned long vaddr;
+ int count;
- sprintf(crash_notes, "/sys/devices/system/cpu");
- if (stat(crash_notes, &cpu_stat)) {
- die("Cannot stat %s: %s\nTry mounting sysfs\n",
- crash_notes, strerror(errno));
- }
-
- sprintf(crash_notes, "/sys/devices/system/cpu/cpu%d/crash_notes", cpu);
+ sprintf(crash_notes, "/sys/kernel/crash_notes");
fp = fopen(crash_notes, "r");
- if (!fp) {
- /* CPU is not physically present.*/
- *addr = 0;
- return -1;
- }
-
- if (fgets(line, sizeof(line), fp) != 0) {
- int count;
- count = sscanf(line, "%Lx", addr);
- if (count != 1) {
- *addr = 0;
- return -1;
+ if (fp) {
+ if (fgets(line, sizeof(line), fp) != 0) {
+ count = sscanf(line, "%lx", &vaddr);
+ if (count != 1)
+ die("Cannot parse %s: %s\n", crash_notes,
+ strerror(errno));
}
+ *addr = __pa(vaddr + (cpu * MAX_NOTE_BYTES));
#if 0
printf("crash_notes addr = %Lx\n", *addr);
#endif
- }
- return 0;
+ return 0;
+ } else
+ return get_crash_notes_per_cpu(cpu, addr);
}
/* Prepares the crash memory elf64 headers and stores in supplied buffer. */
@@ -475,7 +469,7 @@ static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
int i;
char *bufp;
long int nr_cpus = 0;
- unsigned long long notes_addr;
+ uint64_t notes_addr;
bufp = (char*) buf;
@@ -508,11 +502,8 @@ static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
return -1;
}
- /* Need to find a better way to determine per cpu notes section size. */
-#define MAX_NOTE_BYTES 1024
-
for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes_section_addr (i, &notes_addr) < 0) {
+ if (get_crash_notes(i, &notes_addr) < 0) {
/* This cpu is not present. Skip it. */
continue;
}
@@ -571,7 +562,7 @@ static int prepare_crash_memory_elf32_headers(struct kexec_info *info,
int i;
char *bufp;
long int nr_cpus = 0;
- unsigned long long notes_addr;
+ uint64_t notes_addr;
bufp = (char*) buf;
@@ -607,7 +598,7 @@ static int prepare_crash_memory_elf32_headers(struct kexec_info *info,
/* Need to find a better way to determine per cpu notes section size. */
#define MAX_NOTE_BYTES 1024
for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes_section_addr (i, &notes_addr) < 0) {
+ if (get_crash_notes(i, &notes_addr) < 0) {
/* This cpu is not present. Skip it. */
return -1;
}
diff --git a/kexec/arch/i386/kexec-x86.c b/kexec/arch/i386/kexec-x86.c
index 26cbbb0..1c8d188 100644
--- a/kexec/arch/i386/kexec-x86.c
+++ b/kexec/arch/i386/kexec-x86.c
@@ -33,8 +33,6 @@
#include "crashdump-x86.h"
#include <arch/options.h>
-#define MAX_LINE 160
-
static struct memory_range memory_range[MAX_MEMORY_RANGES];
/* Return a sorted list of memory ranges. */
diff --git a/kexec/arch/ia64/kexec-ia64.c b/kexec/arch/ia64/kexec-ia64.c
index a2221e6..f631cef 100644
--- a/kexec/arch/ia64/kexec-ia64.c
+++ b/kexec/arch/ia64/kexec-ia64.c
@@ -34,7 +34,6 @@
#include <arch/options.h>
#define MAX_MEMORY_RANGES 64
-#define MAX_LINE 160
static struct memory_range memory_range[MAX_MEMORY_RANGES];
/* Return a sorted list of available memory ranges. */
diff --git a/kexec/arch/ppc/kexec-ppc.c b/kexec/arch/ppc/kexec-ppc.c
index 455febf..16ea584 100644
--- a/kexec/arch/ppc/kexec-ppc.c
+++ b/kexec/arch/ppc/kexec-ppc.c
@@ -19,7 +19,6 @@
#include <arch/options.h>
#define MAX_MEMORY_RANGES 64
-#define MAX_LINE 160
static struct memory_range memory_range[MAX_MEMORY_RANGES];
/* Return a sorted list of memory ranges. */
diff --git a/kexec/arch/x86_64/crashdump-x86_64.c b/kexec/arch/x86_64/crashdump-x86_64.c
index f104b89..3d0f3a5 100644
--- a/kexec/arch/x86_64/crashdump-x86_64.c
+++ b/kexec/arch/x86_64/crashdump-x86_64.c
@@ -30,12 +30,11 @@
#include "../../kexec.h"
#include "../../kexec-elf.h"
#include "../../kexec-syscall.h"
+#include "../../crashdump.h"
#include "kexec-x86_64.h"
#include "crashdump-x86_64.h"
#include <x86/x86-linux.h>
-#define MAX_LINE 160
-
extern struct arch_options_t arch_options;
/* Forward Declaration. */
@@ -471,44 +470,6 @@ static int cmdline_add_memmap_acpi(char *cmdline, unsigned long start,
return 0;
}
-/* Returns the virtual address of start of crash notes buffer for a cpu. */
-static int get_crash_notes_section_addr(int cpu, unsigned long long *addr)
-{
-
-#define MAX_SYSFS_PATH_LEN 70
- char crash_notes[MAX_SYSFS_PATH_LEN];
- char line[MAX_LINE];
- FILE *fp;
- struct stat cpu_stat;
-
- sprintf(crash_notes, "/sys/devices/system/cpu");
- if (stat(crash_notes, &cpu_stat)) {
- die("Cannot stat %s: %s\nTry mounting sysfs\n",
- crash_notes, strerror(errno));
- }
-
- sprintf(crash_notes, "/sys/devices/system/cpu/cpu%d/crash_notes", cpu);
- fp = fopen(crash_notes, "r");
- if (!fp) {
- /* CPU is not physically present.*/
- *addr = 0;
- return -1;
- }
-
- if (fgets(line, sizeof(line), fp) != 0) {
- int count;
- count = sscanf(line, "%Lx", addr);
- if (count != 1) {
- *addr = 0;
- return -1;
- }
-#if 0
- printf("crash_notes addr = %Lx\n", *addr);
-#endif
- }
- return 0;
-}
-
/* Prepares the crash memory elf64 headers and stores in supplied buffer. */
static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
void *buf, unsigned long size)
@@ -518,7 +479,7 @@ static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
int i;
char *bufp;
long int nr_cpus = 0;
- unsigned long long notes_addr;
+ uint64_t notes_addr;
bufp = (char*) buf;
@@ -554,7 +515,7 @@ static int prepare_crash_memory_elf64_headers(struct kexec_info *info,
/* Need to find a better way to determine per cpu notes section size. */
#define MAX_NOTE_BYTES 1024
for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes_section_addr (i, &notes_addr) < 0) {
+ if (get_crash_notes_per_cpu(i, &notes_addr) < 0) {
/* This cpu is not present. Skip it. */
continue;
}
@@ -624,7 +585,7 @@ static int prepare_crash_memory_elf32_headers(struct kexec_info *info,
int i;
char *bufp;
long int nr_cpus = 0;
- unsigned long long notes_addr;
+ uint64_t notes_addr;
bufp = (char*) buf;
@@ -660,7 +621,7 @@ static int prepare_crash_memory_elf32_headers(struct kexec_info *info,
/* Need to find a better way to determine per cpu notes section size. */
#define MAX_NOTE_BYTES 1024
for (i = 0; i < nr_cpus; i++) {
- if (get_crash_notes_section_addr (i, &notes_addr) < 0) {
+ if (get_crash_notes_per_cpu(i, &notes_addr) < 0) {
/* This cpu is not present. Skip it. */
return -1;
}
diff --git a/kexec/arch/x86_64/kexec-x86_64.c b/kexec/arch/x86_64/kexec-x86_64.c
index 3ed3844..db3e5d4 100644
--- a/kexec/arch/x86_64/kexec-x86_64.c
+++ b/kexec/arch/x86_64/kexec-x86_64.c
@@ -34,7 +34,6 @@
#include <arch/options.h>
#define MAX_MEMORY_RANGES 64
-#define MAX_LINE 160
static struct memory_range memory_range[MAX_MEMORY_RANGES];
/* Return a sorted list of memory ranges. */
diff --git a/kexec/crashdump.c b/kexec/crashdump.c
new file mode 100644
index 0000000..9e5bf15
--- /dev/null
+++ b/kexec/crashdump.c
@@ -0,0 +1,65 @@
+/*
+ * crashdump.c: Architecture independent code for crashdump support.
+ *
+ * Created by: Vivek Goyal (vgoyal@in.ibm.com)
+ * Copyright (C) IBM Corporation, 2005. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation (version 2 of the License).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <elf.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "kexec.h"
+#include "crashdump.h"
+
+/* Returns the physical address of start of crash notes buffer for a cpu. */
+int get_crash_notes_per_cpu(int cpu, uint64_t *addr)
+{
+ char crash_notes[PATH_MAX];
+ char line[MAX_LINE];
+ FILE *fp;
+ struct stat cpu_stat;
+ int count;
+ unsigned long long temp;
+
+ sprintf(crash_notes, "/sys/devices/system/cpu/cpu%d/crash_notes", cpu);
+ fp = fopen(crash_notes, "r");
+ if (!fp) {
+ /* Either sysfs is not mounted or CPU is not present*/
+ if (stat("/sys/devices", &cpu_stat))
+ die("Sysfs is not mounted. Try mounting sysfs\n");
+
+ /* CPU is not physically present.*/
+ *addr = 0;
+ return errno;
+ }
+ if (fgets(line, sizeof(line), fp) != 0) {
+ count = sscanf(line, "%Lx", &temp);
+ if (count != 1)
+ die("Cannot parse %s: %s\n", crash_notes,
+ strerror(errno));
+ *addr = (uint64_t) temp;
+ }
+#if 0
+ printf("crash_notes addr = %Lx\n", *addr);
+#endif
+ return 0;
+}
diff --git a/kexec/crashdump.h b/kexec/crashdump.h
new file mode 100644
index 0000000..682dd53
--- /dev/null
+++ b/kexec/crashdump.h
@@ -0,0 +1,9 @@
+#ifndef CRASHDUMP_H
+#define CRASHDUMP_H
+
+extern int get_crash_notes_per_cpu(int cpu, uint64_t *addr);
+
+/* Need to find a better way to determine per cpu notes section size. */
+#define MAX_NOTE_BYTES 1024
+
+#endif /* CRASHDUMP_H */
diff --git a/kexec/kexec.h b/kexec/kexec.h
index a125cb7..57fca7d 100644
--- a/kexec/kexec.h
+++ b/kexec/kexec.h
@@ -196,4 +196,5 @@ int arch_process_options(int argc, char **argv);
int arch_compat_trampoline(struct kexec_info *info);
void arch_update_purgatory(struct kexec_info *info);
+#define MAX_LINE 160
#endif /* KEXEC_H */
generated by cgit (git 2.34.1) at 2025-07-17 23:01:02 +0000