At the outcome of this patch set, the crash_prepare_elf64_headers()
is utilized on both the kexec_file_load() and kexec_load() paths. As
such, need to move this function out of kexec_file.c and into a
common location crash_core.c.
No functionality change.
Signed-off-by: Eric DeVolder <eric.devolder@xxxxxxxxxx>
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
---
kernel/crash_core.c | 100
++++++++++++++++++++++++++++++++++++++++++++
kernel/kexec_file.c | 99 -------------------------------------------
2 files changed, 100 insertions(+), 99 deletions(-)
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index a0eb4d5cf557..46c160d14045 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -10,6 +10,7 @@
#include <linux/utsname.h>
#include <linux/vmalloc.h>
#include <linux/sizes.h>
+#include <linux/kexec.h>
#include <asm/page.h>
#include <asm/sections.h>
@@ -314,6 +315,105 @@ static int __init parse_crashkernel_dummy(char
*arg)
}
early_param("crashkernel", parse_crashkernel_dummy);
+int crash_prepare_elf64_headers(struct crash_mem *mem, int
need_kernel_map,
+ void **addr, unsigned long *sz)
+{
+ Elf64_Ehdr *ehdr;
+ Elf64_Phdr *phdr;
+ unsigned long nr_cpus = num_possible_cpus(), nr_phdr, elf_sz;
+ unsigned char *buf;
+ unsigned int cpu, i;
+ unsigned long long notes_addr;
+ unsigned long mstart, mend;
+
+ /* extra phdr for vmcoreinfo ELF note */
+ nr_phdr = nr_cpus + 1;
+ nr_phdr += mem->nr_ranges;
+
+ /*
+ * kexec-tools creates an extra PT_LOAD phdr for kernel text
mapping
+ * area (for example, ffffffff80000000 - ffffffffa0000000 on
x86_64).
+ * I think this is required by tools like gdb. So same physical
+ * memory will be mapped in two ELF headers. One will contain
kernel
+ * text virtual addresses and other will have __va(physical)
addresses.
+ */
+
+ nr_phdr++;
+ elf_sz = sizeof(Elf64_Ehdr) + nr_phdr * sizeof(Elf64_Phdr);
+ elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN);
