tree 5766fa5aa8375263757f24819219175ccf8cfaa5
parent e18eb2d1eb03fa06ccb7823a44d7ceea621e2bbb
author Heiko Carstens <heiko.carstens@de.ibm.com> 1462192709 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1462372185 +0200

s390/dumpstack: implement and use return_address()

Implement return_address() and use it instead of __builtin_return_address(n).

__builtin_return_address(n) is not guaranteed to work for n > 0,
therefore implement a private return_address() function which walks
the stack frames and returns the proper return address.

This way we get also rid of a compile warning which gcc 6.1 emits and
look like all other architectures.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>