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Fix for the ARM64 "bt" command in Linux 4.10 and later kernels that

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are configured with CONFIG_THREAD_INFO_IN_TASK.  Without the patch,
the "bt" command will fail for active tasks in dumpfiles that were
generated by the kdump facility.
(takahiro.akashi@linaro.org)
This commit is contained in:
Dave Anderson 2017-01-05 09:23:33 -05:00
parent b809cb7d9b
commit 58225d5106
1 changed files with 6 additions and 4 deletions
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10
arm64.c
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@ -2447,7 +2447,7 @@ arm64_in_kdump_text(struct bt_info *bt, struct arm64_stackframe *frame)
(*ptr < ms->crash_kexec_end) &&
INSTACK(*(ptr - 1), bt)) {
bt->bptr = ((ulong)(ptr - 1) - (ulong)base)
+ bt->tc->thread_info;
+ task_to_stackbase(bt->tc->task);
if (CRASHDEBUG(1))
fprintf(fp, "%lx: %lx (crash_kexec)\n", bt->bptr, *ptr);
return TRUE;
@ -2456,20 +2456,22 @@ arm64_in_kdump_text(struct bt_info *bt, struct arm64_stackframe *frame)
(*ptr < ms->crash_save_cpu_end) &&
INSTACK(*(ptr - 1), bt)) {
bt->bptr = ((ulong)(ptr - 1) - (ulong)base)
+ bt->tc->thread_info;
+ task_to_stackbase(bt->tc->task);
if (CRASHDEBUG(1))
fprintf(fp, "%lx: %lx (crash_save_cpu)\n", bt->bptr, *ptr);
return TRUE;
}
} else {
if ((*ptr >= ms->crash_kexec_start) && (*ptr < ms->crash_kexec_end)) {
bt->bptr = ((ulong)ptr - (ulong)base) + bt->tc->thread_info;
bt->bptr = ((ulong)ptr - (ulong)base)
+ task_to_stackbase(bt->tc->task);
if (CRASHDEBUG(1))
fprintf(fp, "%lx: %lx (crash_kexec)\n", bt->bptr, *ptr);
return TRUE;
}
if ((*ptr >= ms->crash_save_cpu_start) && (*ptr < ms->crash_save_cpu_end)) {
bt->bptr = ((ulong)ptr - (ulong)base) + bt->tc->thread_info;
bt->bptr = ((ulong)ptr - (ulong)base)
+ task_to_stackbase(bt->tc->task);
if (CRASHDEBUG(1))
fprintf(fp, "%lx: %lx (crash_save_cpu)\n", bt->bptr, *ptr);
return TRUE;