diff options
| author | Nathan Huckleberry <nhuck@google.com> | 2020-07-10 20:23:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 10:53:04 +0200 |
| commit | 3d5353df4aed1f44949c114c2abe4d0810956ab7 (patch) | |
| tree | 5b97ec7dc9a4f0ee74e0ed72bb288b6a28aecde1 /include/linux/debugobjects.h | |
| parent | 92ddf1d46eb36d10f9d1d7bb1e8fad232a7e677b (diff) | |
ARM: 8992/1: Fix unwind_frame for clang-built kernels
commit b4d5ec9b39f8b31d98f65bc5577b5d15d93795d7 upstream.
Since clang does not push pc and sp in function prologues, the current
implementation of unwind_frame does not work. By using the previous
frame's lr/fp instead of saved pc/sp we get valid unwinds on clang-built
kernels.
The bounds check on next frame pointer must be changed as well since
there are 8 less bytes between frames.
This fixes /proc/<pid>/stack.
Link: https://github.com/ClangBuiltLinux/linux/issues/912
Reported-by: Miles Chen <miles.chen@mediatek.com>
Tested-by: Miles Chen <miles.chen@mediatek.com>
Cc: stable@vger.kernel.org
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions