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s390/dumpstack: resolve userspace last_break

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report_user_fault() currently does not show which library last_break
points to. Call print_vma_addr() to find out; the output now looks
like this:

    Last Breaking-Event-Address:
     [<000003ffaa2a56e4>] libc.so.6[3ffaa180000+251000]

For kernel it's unchanged:

    Last Breaking-Event-Address:
     [<000000000030fd06>] trace_hardirqs_on+0x56/0xc8

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Ilya Leoshkevich 2023-03-10 03:36:48 +01:00 committed by Heiko Carstens
parent 7db1224630
commit 7229ea86e0
1 changed files with 7 additions and 1 deletions
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8
arch/s390/kernel/dumpstack.c
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@ -152,7 +152,13 @@ void show_stack(struct task_struct *task, unsigned long *stack,
static void show_last_breaking_event(struct pt_regs *regs)
{
printk("Last Breaking-Event-Address:\n");
printk(" [<%016lx>] %pSR\n", regs->last_break, (void *)regs->last_break);
printk(" [<%016lx>] ", regs->last_break);
if (user_mode(regs)) {
print_vma_addr(KERN_CONT, regs->last_break);
pr_cont("\n");
} else {
pr_cont("%pSR\n", (void *)regs->last_break);
}
}
void show_registers(struct pt_regs *regs)