kernel/arch/microblaze/include/asm/unwind.h, branch linux-rolling-stable

microblaze: add loglvl to microblaze_unwind()

2020-06-09T16:39:11Z

Currently, the log-level of show_stack() depends on a platform realization. It creates situations where the headers are printed with lower log level or higher than the stacktrace (depending on a platform or user). Furthermore, it forces the logic decision from user to an architecture side. In result, some users as sysrq/kdb/etc are doing tricks with temporary rising console_loglevel while printing their messages. And in result it not only may print unwanted messages from other CPUs, but also omit printing at all in the unlucky case where the printk() was deferred. Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems an easier approach than introducing more printk buffers. Also, it will consolidate printings with headers. Add log level parameter to microblaze_unwind() as a preparation to add show_stack_loglvl(). [1]: https://lore.kernel.org/lkml/20190528002412.1625-1-dima@arista.com/T/#u Signed-off-by: Dmitry Safonov Signed-off-by: Andrew Morton Cc: Michal Simek Link: http://lkml.kernel.org/r/20200418201944.482088-20-dima@arista.com Signed-off-by: Linus Torvalds

microblaze: Convert headers to SPDX license

2020-02-25T11:33:19Z

Covert all headers to SPDX. Signed-off-by: Michal Simek Reviewed-by: Stefan Asserhall Reviewed-by: Arnd Bergmann

microblaze: Add stack unwinder

2010-08-04T08:22:35Z

Implement intelligent backtracing by searching for stack frame creation, and emitting only return addresses. Use print_hex_dump() to display the entire binary kernel stack. Limitation: MMU kernels are not currently able to trace beyond a system trap (interrupt, syscall, etc.). It is the intent of this patch to provide infrastructure that can be extended to add this capability later. Changes from V1: * Removed checks in find_frame_creation() that prevented location of the frame creation instruction in heavily optimized code * Various formatting/commenting/file location tweaks per review comments * Dropped Kconfig option to enable STACKTRACE as something logically separate Signed-off-by: Steven J. Magnani