I'm currently working on getting sframe support from the kernel. In order to do that, it requires some fixes. Josh Poimboeuf did a lot of the hard work already, but he told me he doesn't have time to continue it so I'm picking it up where he left off.
His last series of v4 is here: https://lore.kernel.org/all/[email protected]/ It covers a lot of topics as he found issues with other aspects of the kernel that needed to be fixed for sframes to work properly. This series focuses only on the VDSO code. They are helpful fixes and updates that doesn't rely on sframes (although the last patch is sframe related). I based this off of the latest tip/master: commit 0c6ae66ef164c408daeab6a61aace4b86010369a Changes since v5: https://lore.kernel.org/all/[email protected]/ - Updated change log of patch 3 to make it more of a clean up than a fix. - Replaced $(comma} with actual comma in Makefile of the last patch. Josh Poimboeuf (6): x86/vdso: Fix DWARF generation for getrandom() x86/asm: Avoid emitting DWARF CFI for non-VDSO x86/asm: Use CFI_* macros in SYM_FUNC_* macros so they can be added to VDSO x86/vdso: Use SYM_FUNC_{START,END} in __kernel_vsyscall() x86/vdso: Use CFI macros in __vdso_sgx_enter_enclave() x86/vdso: Enable sframe generation in VDSO ---- arch/Kconfig | 3 ++ arch/x86/entry/vdso/Makefile | 10 ++++-- arch/x86/entry/vdso/vdso-layout.lds.S | 5 ++- arch/x86/entry/vdso/vdso32/system_call.S | 10 ++---- arch/x86/entry/vdso/vgetrandom-chacha.S | 3 +- arch/x86/entry/vdso/vsgx.S | 19 +++++------ arch/x86/include/asm/dwarf2.h | 54 ++++++++++++++++++++++---------- arch/x86/include/asm/linkage.h | 33 +++++++++++++++---- arch/x86/include/asm/vdso.h | 1 - 9 files changed, 89 insertions(+), 49 deletions(-)
