[PATCH v5 3/8] preparation functions for parsing vmcoreinfo
Baoquan He
bhe at redhat.com
Sun Aug 24 22:45:47 PDT 2014
Add 2 preparation functions get_elf_loads and get_page_offset, later
they will be needed for parsing vmcoreinfo.
Meanwhile check if info->kernel_version is not zero. If it has been
assigned to a value, just return directly.
Signed-off-by: Baoquan He <bhe at redhat.com>
---
elf_info.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
elf_info.h | 1 +
makedumpfile.c | 18 ++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/elf_info.c b/elf_info.c
index b277f69..69d3fdb 100644
--- a/elf_info.c
+++ b/elf_info.c
@@ -681,6 +681,56 @@ get_elf32_ehdr(int fd, char *filename, Elf32_Ehdr *ehdr)
return TRUE;
}
+int
+get_elf_loads(int fd, char *filename)
+{
+ int i, j, phnum, elf_format;
+ Elf64_Phdr phdr;
+
+ /*
+ * Check ELF64 or ELF32.
+ */
+ elf_format = check_elf_format(fd, filename, &phnum, &num_pt_loads);
+ if (elf_format == ELF64)
+ flags_memory |= MEMORY_ELF64;
+ else if (elf_format != ELF32)
+ return FALSE;
+
+ if (!num_pt_loads) {
+ ERRMSG("Can't get the number of PT_LOAD.\n");
+ return FALSE;
+ }
+
+ /*
+ * The below file information will be used as /proc/vmcore.
+ */
+ fd_memory = fd;
+ name_memory = filename;
+
+ pt_loads = calloc(sizeof(struct pt_load_segment), num_pt_loads);
+ if (pt_loads == NULL) {
+ ERRMSG("Can't allocate memory for the PT_LOAD. %s\n",
+ strerror(errno));
+ return FALSE;
+ }
+ for (i = 0, j = 0; i < phnum; i++) {
+ if (!get_phdr_memory(i, &phdr))
+ return FALSE;
+
+ if (phdr.p_type != PT_LOAD)
+ continue;
+
+ if (j >= num_pt_loads)
+ return FALSE;
+ if(!dump_Elf_load(&phdr, j))
+ return FALSE;
+ j++;
+ }
+
+ return TRUE;
+}
+
+
/*
* Get ELF information about /proc/vmcore.
*/
diff --git a/elf_info.h b/elf_info.h
index 801faff..263d993 100644
--- a/elf_info.h
+++ b/elf_info.h
@@ -44,6 +44,7 @@ int get_elf64_ehdr(int fd, char *filename, Elf64_Ehdr *ehdr);
int get_elf32_ehdr(int fd, char *filename, Elf32_Ehdr *ehdr);
int get_elf_info(int fd, char *filename);
void free_elf_info(void);
+int get_elf_loads(int fd, char *filename);
int is_elf64_memory(void);
int is_xen_memory(void);
diff --git a/makedumpfile.c b/makedumpfile.c
index 44cf26f..8c8ca91 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -682,6 +682,9 @@ get_kernel_version(char *release)
long maj, min, rel;
char *start, *end;
+ if (info->kernel_version)
+ return info->kernel_version;
+
/*
* This method checks that vmlinux and vmcore are same kernel version.
*/
@@ -706,6 +709,7 @@ get_kernel_version(char *release)
MSG("The kernel version is not supported.\n");
MSG("The created dumpfile may be incomplete.\n");
}
+
return version;
}
@@ -9125,6 +9129,20 @@ int is_crashkernel_mem_reserved(void)
return !!crash_reserved_mem_nr;
}
+static int get_page_offset()
+{
+ struct utsname utsname;
+ if (uname(&utsname)) {
+ ERRMSG("Cannot get name and information about current kernel : %s", strerror(errno));
+ return FALSE;
+ }
+
+ info->kernel_version = get_kernel_version(utsname.release);
+ get_versiondep_info();
+
+ return TRUE;
+}
+
static struct option longopts[] = {
{"split", no_argument, NULL, OPT_SPLIT},
{"reassemble", no_argument, NULL, OPT_REASSEMBLE},
--
1.8.5.3
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