This RFC series adds s390 support for unwinding of signal frames in user space using SFrame V3's indication of signal frames.
Prerequirements: This series applies on top of the latest unwind user sframe s390 series "[PATCH v4 00/12] s390: SFrame user space unwinding": https://lore.kernel.org/all/[email protected]/ on top of the latest unwind user sframe series "[PATCH v13 00/18] unwind_deferred: Implement sframe handling": https://lore.kernel.org/all/[email protected]/ Like above series it depends on the upcoming binutils 2.46 release to be used to build executables and libraries (e.g. vDSO) with SFrame V3 on s390 (using the assembler option --gsframe-3). Overview: Patches 1 and 2 enables the common unwind user (sframe) frameworks to support signal frames: - Patch 1 enables unwind user to resort to an architecture-specific signal frame unwinder, if a frame is a signal frame. - Patch 2 adds support to unwind user sframe to provide the signal frame indication represented in SFrame V3. Patch 3 annotates the s390 vDSO functions __kernel_[rt_]sigreturn() as signal frames. Patch 4 moves the s390 struct [rt_]sigframe to asm/sigframe.h so that it can be used in unwind user. Patch 5 enables signal frame unwinding in user space on s390. Regards, Jens Jens Remus (5): unwind_user: Enable arch-specific signal frame unwinders unwind_user/sframe: Add support for signal frame indication s390/vdso: Annotate __kernel_[rt_]sigreturn as signal frames s390/signal: Move struct [rt_]sigframe to asm/sigframe.h s390/unwind_user: Enable signal frame unwinding of user space arch/s390/include/asm/dwarf.h | 3 + arch/s390/include/asm/sigframe.h | 78 +++++++++++++++++++++++ arch/s390/include/asm/unwind_user.h | 57 +++++++++++++++++ arch/s390/kernel/signal.c | 71 +-------------------- arch/s390/kernel/vdso/vdso_user_wrapper.S | 15 ++++- arch/x86/include/asm/unwind_user.h | 6 +- include/linux/unwind_user.h | 9 +++ include/linux/unwind_user_types.h | 1 + kernel/unwind/sframe.c | 8 ++- kernel/unwind/sframe.h | 1 + kernel/unwind/user.c | 4 ++ 11 files changed, 178 insertions(+), 75 deletions(-) create mode 100644 arch/s390/include/asm/sigframe.h -- 2.51.0
