summaryrefslogtreecommitdiff
path: root/kernel/kexec_file.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/kexec_file.c')
-rw-r--r--kernel/kexec_file.c41
1 files changed, 26 insertions, 15 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 78c0837bfd7b..ca40bef75a61 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -1169,24 +1169,26 @@ int crash_exclude_mem_range(struct crash_mem *mem,
unsigned long long mstart, unsigned long long mend)
{
int i, j;
- unsigned long long start, end;
+ unsigned long long start, end, p_start, p_end;
struct crash_mem_range temp_range = {0, 0};
for (i = 0; i < mem->nr_ranges; i++) {
start = mem->ranges[i].start;
end = mem->ranges[i].end;
+ p_start = mstart;
+ p_end = mend;
if (mstart > end || mend < start)
continue;
/* Truncate any area outside of range */
if (mstart < start)
- mstart = start;
+ p_start = start;
if (mend > end)
- mend = end;
+ p_end = end;
/* Found completely overlapping range */
- if (mstart == start && mend == end) {
+ if (p_start == start && p_end == end) {
mem->ranges[i].start = 0;
mem->ranges[i].end = 0;
if (i < mem->nr_ranges - 1) {
@@ -1197,20 +1199,29 @@ int crash_exclude_mem_range(struct crash_mem *mem,
mem->ranges[j].end =
mem->ranges[j+1].end;
}
+
+ /*
+ * Continue to check if there are another overlapping ranges
+ * from the current position because of shifting the above
+ * mem ranges.
+ */
+ i--;
+ mem->nr_ranges--;
+ continue;
}
mem->nr_ranges--;
return 0;
}
- if (mstart > start && mend < end) {
+ if (p_start > start && p_end < end) {
/* Split original range */
- mem->ranges[i].end = mstart - 1;
- temp_range.start = mend + 1;
+ mem->ranges[i].end = p_start - 1;
+ temp_range.start = p_end + 1;
temp_range.end = end;
- } else if (mstart != start)
- mem->ranges[i].end = mstart - 1;
+ } else if (p_start != start)
+ mem->ranges[i].end = p_start - 1;
else
- mem->ranges[i].start = mend + 1;
+ mem->ranges[i].start = p_end + 1;
break;
}
@@ -1247,7 +1258,7 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
unsigned long long notes_addr;
unsigned long mstart, mend;
- /* extra phdr for vmcoreinfo elf note */
+ /* extra phdr for vmcoreinfo ELF note */
nr_phdr = nr_cpus + 1;
nr_phdr += mem->nr_ranges;
@@ -1255,7 +1266,7 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
* 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
+ * memory will be mapped in two ELF headers. One will contain kernel
* text virtual addresses and other will have __va(physical) addresses.
*/
@@ -1282,7 +1293,7 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
ehdr->e_ehsize = sizeof(Elf64_Ehdr);
ehdr->e_phentsize = sizeof(Elf64_Phdr);
- /* Prepare one phdr of type PT_NOTE for each present cpu */
+ /* Prepare one phdr of type PT_NOTE for each present CPU */
for_each_present_cpu(cpu) {
phdr->p_type = PT_NOTE;
notes_addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpu));
@@ -1324,10 +1335,10 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
phdr->p_align = 0;
ehdr->e_phnum++;
- phdr++;
- pr_debug("Crash PT_LOAD elf header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
+ pr_debug("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
ehdr->e_phnum, phdr->p_offset);
+ phdr++;
}
*addr = buf;