kexec-tools: Introduce kexec-iomem.c and /proc/iomem parsing code
This patch adds the new file kexec-iomem.c that implements code to parse
/proc/iomem line-by-line. The following patches make use of this code
- especially the Xen-code that use /proc/iomem to get crash note information.
Signed-off-by: Magnus Damm <[EMAIL PROTECTED]>
---
kexec/Makefile | 1
kexec/kexec-iomem.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++
kexec/kexec.h | 3 +
3 files changed, 97 insertions(+)
--- 0001/kexec/Makefile
+++ work/kexec/Makefile 2006-11-17 16:16:49.000000000 +0900
@@ -16,6 +16,7 @@ KEXEC_C_SRCS+= kexec/kexec-elf-exec.c
KEXEC_C_SRCS+= kexec/kexec-elf-core.c
KEXEC_C_SRCS+= kexec/kexec-elf-rel.c
KEXEC_C_SRCS+= kexec/kexec-elf-boot.c
+KEXEC_C_SRCS+= kexec/kexec-iomem.c
KEXEC_C_SRCS+= kexec/crashdump.c
KEXEC_C_GENERATED_SRCS+= $(PURGATORY_HEX_C)
KEXEC_S_SRCS:=
--- /dev/null
+++ work/kexec/kexec-iomem.c 2006-11-17 16:19:27.000000000 +0900
@@ -0,0 +1,93 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "kexec.h"
+#include "crashdump.h"
+
+static int kexec_iomem_for_each_line(char *match,
+ int (*callback)(void *data,
+ int nr,
+ char *str,
+ unsigned long base,
+ unsigned long length),
+ void *data)
+{
+ const char iomem[]= "/proc/iomem";
+ char line[MAX_LINE];
+ FILE *fp;
+ unsigned long long start, end, size;
+ char *str;
+ int consumed;
+ int count;
+ int nr = 0;
+
+ fp = fopen(iomem, "r");
+ if (!fp)
+ die("Cannot open /proc/iomem");
+
+ while(fgets(line, sizeof(line), fp) != 0) {
+ count = sscanf(line, "%Lx-%Lx : %n", &start, &end, &consumed);
+ if (count != 2)
+ continue;
+ str = line + consumed;
+ size = end - start + 1;
+ if (!match || memcmp(str, match, strlen(match)) == 0) {
+ if (callback
+ && callback(data, nr, str, start, size) < 0) {
+ break;
+ }
+ nr++;
+ }
+ }
+
+ fclose(fp);
+
+ return nr;
+}
+
+static int kexec_iomem_single_callback(void *data, int nr,
+ char *str,
+ unsigned long base,
+ unsigned long length)
+{
+ struct memory_range *range = data;
+
+ if (nr == 0) {
+ range->start = base;
+ range->end = base + length - 1;
+ }
+
+ return 0;
+}
+
+int kexec_iomem_single(char *str, uint64_t *start, uint64_t *end)
+{
+ struct memory_range range;
+ int ret;
+
+ memset(&range, 0, sizeof(range));
+
+ ret = kexec_iomem_for_each_line(str, kexec_iomem_single_callback,
+ &range);
+
+ if (ret == 1) {
+ if (start)
+ *start = range.start;
+ if (end)
+ *end = range.end;
+
+ ret = 0;
+ }
+ else
+ ret = -1;
+
+ return ret;
+}
--- 0001/kexec/kexec.h
+++ work/kexec/kexec.h 2006-11-17 16:19:20.000000000 +0900
@@ -201,6 +201,9 @@ int arch_compat_trampoline(struct kexec_
void arch_update_purgatory(struct kexec_info *info);
int is_crashkernel_mem_reserved(void);
+int kexec_iomem_single(char *str, uint64_t *start, uint64_t *end);
+
+
#define MAX_LINE 160
#ifdef DEBUG
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