linux/arch/s390
Vasily Gorbik 708b137639 s390/unwind: avoid duplicated unwinding entries for kretprobes
Currently when unwinding starts from pt_regs or encounters pt_regs along
the way unwinder tries to yield 2 unwinding entries:
1. (reliable)     ip1: pt_regs->psw.addr,  sp1: regs->gprs[15]
2. (non-reliable) ip2: sp1->gprs[8] (r14), sp2: regs->gprs[15]

In case of kretprobes those are identical and serves no other purpose
than causing confusion over duplicated entries and cause kprobes tests
to fail. So, skip a duplicate non-reliable entry in this case.

With that kretprobes and unwinder implementation now comply with
ARCH_CORRECT_STACKTRACE_ON_KRETPROBE.

Reviewed-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-03-27 22:18:39 +02:00
..
appldata s390/appldata: use struct_size() helper 2020-06-29 16:32:34 +02:00
boot s390: remove invalid email address of Heiko Carstens 2022-02-06 23:31:29 +01:00
configs s390: update defconfigs 2022-01-24 09:10:59 +01:00
crypto s390: convert ".insn" encoding to instruction names 2022-03-10 15:58:17 +01:00
hypfs s390/extable: move EX_TABLE define to asm-extable.h 2022-03-08 00:33:00 +01:00
include s390/unwind: recover kretprobe modified return address in stacktrace 2022-03-27 22:18:39 +02:00
kernel s390/unwind: avoid duplicated unwinding entries for kretprobes 2022-03-27 22:18:39 +02:00
kvm s390 updates for the 5.18 merge window 2022-03-25 10:01:34 -07:00
lib s390/test_unwind: extend kretprobe test 2022-03-27 22:18:39 +02:00
mm s390: convert ".insn" encoding to instruction names 2022-03-10 15:58:17 +01:00
net s390: raise minimum supported machine generation to z10 2022-03-10 15:58:17 +01:00
pci s390/pci: make zpci_set_irq()/zpci_clear_irq() static 2022-03-10 15:58:17 +01:00
purgatory s390: enable KCSAN 2021-07-30 17:09:23 +02:00
tools s390: raise minimum supported machine generation to z10 2022-03-10 15:58:17 +01:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig s390/unwind: avoid duplicated unwinding entries for kretprobes 2022-03-27 22:18:39 +02:00
Kconfig.debug tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig 2021-08-16 11:37:21 -04:00
Makefile s390: raise minimum supported machine generation to z10 2022-03-10 15:58:17 +01:00