diff options
| -rw-r--r-- | kexec/arch/x86_64/crashdump-x86_64.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kexec/arch/x86_64/crashdump-x86_64.c b/kexec/arch/x86_64/crashdump-x86_64.c index 9d9ab66..c23fb30 100644 --- a/kexec/arch/x86_64/crashdump-x86_64.c +++ b/kexec/arch/x86_64/crashdump-x86_64.c @@ -808,3 +808,33 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline, } return 0; } + +int is_crashkernel_mem_reserved(void) +{ + const char iomem[]= "/proc/iomem"; + char line[MAX_LINE]; + FILE *fp; + unsigned long long start, end; + char *str; + int consumed; + int count; + + fp = fopen(iomem, "r"); + if (!fp) + die("Cannot open /proc/iomem"); + + while(fgets(line, sizeof(line), fp) != 0) { + count = sscanf(line, "%Lx-%Lx : %n", &start, &end, &consumed); + if (count != 2) + continue; + str = line + consumed; + if (memcmp(str, "Crash kernel\n", 13) == 0) + break; + } + + fclose(fp); + if (!memcmp(str, "Crash kernel\n", 13) == 0 || (start == end)) + return 0; + else + return 1; +} |