[Crash-utility] Re: [PATCH 2/2] loongarch64: enable kaslr offset calculation

crash failed with mainline kernel with kaslr enabled, see below log [snipped some garbage output]: WARNING: could not find MAGIC_START! [snip] xtime timespec.tv_sec: 100000135c: Sun Aug 20 16:54:52 CST 4147 utsname: sysname: (not printable) nodename: (not printable) release: (not printable) version: (not printable) machine: (not printable) domainname: (not printable) crash: cannot determine base kernel version linux_banner: [snip] crash: /home/ruyang/git/linux/vmlinux and ./root/root/vmcore.elf do not match! Add the flags which will enable kaslr offset calculating. Signed-off-by: Dave Young <yangrr.2009(a)tsinghua.org.cn&gt; --- [v1->v2: tune the code comment and commit log according to Mukesh] loongarch64.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/loongarch64.c b/loongarch64.c index c95910f5ea4a..6b518d4af113 100644 --- a/loongarch64.c +++ b/loongarch64.c @@ -1893,6 +1893,13 @@ loongarch64_init(int when) machdep->last_ptbl_read = 0; machdep->verify_paddr = generic_verify_paddr; machdep->ptrs_per_pgd = PTRS_PER_PGD; + + /* + * derive_kaslr_offset() handles the CONFIG_RANDOMIZE_BASE=n + * case by setting kt->relocate to 0. + */ + if (!kt->relocate && !(kt->flags2 & (RELOC_AUTO|KASLR))) + kt->flags2 |= (RELOC_AUTO|KASLR); break; case PRE_GDB: -- 2.51.1