perf tests: Add test for PE binary format support

[linux-2.6-microblaze.git] / kernel / kexec_file.c

diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 78c0837..ca40bef 100644 (file)
--- 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;