/* Loads additional segments in case of a panic kernel is being loaded.
* One segment for storing elf headers for crash memory image.
*/
int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline)
{
void *tmp;
unsigned long sz, elfcorehdr;
int nr_ranges;
struct memory_range *mem_range;
if (crash_get_memory_ranges(&mem_range, &nr_ranges) < 0)
return -1;
if (crash_create_elf32_headers(info, &elf_info32,
mem_range, nr_ranges,
&tmp, &sz,
ELF_CORE_HEADER_ALIGN) < 0)
return -1;
elfcorehdr = add_buffer_phys_virt(info, tmp, sz, sz, 1024,
0, 0xffffffff, -1, 0);
dbgprintf("Created elf header segment at 0x%lx\n", elfcorehdr);
add_cmdline_param(mod_cmdline, elfcorehdr, " elfcorehdr=", "K");
add_cmdline_param(mod_cmdline, elfcorehdr - mem_min, " mem=", "K");
return 0;
}
/* Loads additional segments in case of a panic kernel is being loaded.
* One segment for backup region, another segment for storing elf headers
* for crash memory image.
*/
int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline,
uint64_t max_addr, unsigned long min_base)
{
void *tmp;
unsigned long sz;
uint64_t elfcorehdr;
int nr_ranges, align = 1024, i;
unsigned long long end;
struct memory_range *mem_range;
if (get_crash_memory_ranges(&mem_range, &nr_ranges) < 0)
return -1;
/* Create a backup region segment to store backup data*/
sz = (BACKUP_SRC_SIZE + align - 1) & ~(align - 1);
tmp = xmalloc(sz);
memset(tmp, 0, sz);
info->backup_start = add_buffer(info, tmp, sz, sz, align,
0, max_addr, 1);
reserve(info->backup_start, sz);
/* On ppc64 memory ranges in device-tree is denoted as start
* and size rather than start and end, as is the case with
* other architectures like i386 . Because of this when loading
* the memory ranges in crashdump-elf.c the filesz calculation
* [ end - start + 1 ] goes for a toss.
*
* To be in sync with other archs adjust the end value for
* every crash memory range before calling the generic function
*/
for (i = 0; i < nr_ranges; i++) {
end = crash_memory_range[i].end - 1;
crash_memory_range[i].end = end;
}
/* Create elf header segment and store crash image data. */
if (arch_options.core_header_type == CORE_TYPE_ELF64) {
if (crash_create_elf64_headers(info, &elf_info64,
crash_memory_range, nr_ranges,
&tmp, &sz,
ELF_CORE_HEADER_ALIGN) < 0)
return -1;
}
else {
if (crash_create_elf32_headers(info, &elf_info32,
crash_memory_range, nr_ranges,
&tmp, &sz,
ELF_CORE_HEADER_ALIGN) < 0)
return -1;
}
elfcorehdr = add_buffer(info, tmp, sz, sz, align, min_base,
max_addr, 1);
reserve(elfcorehdr, sz);
/* modify and store the cmdline in a global array. This is later
* read by flatten_device_tree and modified if required
*/
add_cmdline_param(mod_cmdline, elfcorehdr, " elfcorehdr=", "K");
add_cmdline_param(mod_cmdline, saved_max_mem, " savemaxmem=", "M");
return 0;
}
