Deepak Gupta ccad8c1336 arch/riscv: add dual vdso creation logic and select vdso based on hw ... Shadow stack instructions are taken from the Zimop ISA extension, which is mandated on RVA23. Any userspace with shadow stack instructions in it will fault on hardware that doesn't have support for Zimop. Thus, a shadow stack-enabled userspace can't be run on hardware that doesn't support Zimop. It's not known how Linux userspace providers will respond to this kind of binary fragmentation. In order to keep kernel portable across different hardware, 'arch/riscv/kernel/vdso_cfi' is created which has Makefile logic to compile 'arch/riscv/kernel/vdso' sources with CFI flags, and 'arch/riscv/kernel/vdso.c' is modified to select the appropriate vdso depending on whether the underlying CPU implements the Zimop extension. Since the offset of vdso symbols will change due to having two different vdso binaries, there is added logic to include a new generated vdso offset header and dynamically select the offset (like for rt_sigreturn). Signed-off-by: Deepak Gupta <debug@rivosinc.com> Acked-by: Charles Mirabile <cmirabil@redhat.com> Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de> # QEMU, custom CVA6 Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com> Link: https://patch.msgid.link/20251112-v5_user_cfi_series-v23-24-b55691eacf4f@rivosinc.com [pjw@kernel.org: cleaned up patch description] Signed-off-by: Paul Walmsley <pjw@kernel.org>		2026-01-29 02:38:40 -07:00
..
.gitignore	RISC-V: Fix the VDSO symbol generaton for binutils-2.35+	2020-11-06 00:03:48 -08:00
flush_icache.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
gen_vdso_offsets.sh	arch/riscv: add dual vdso creation logic and select vdso based on hw	2026-01-29 02:38:40 -07:00
getcpu.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
getrandom.c	RISC-V: vDSO: Wire up getrandom() vDSO implementation	2025-06-05 14:03:09 -07:00
hwprobe.c	riscv: hwprobe: Fix stale vDSO data for late-initialized keys at boot	2025-10-17 22:23:11 -06:00
Makefile	arch/riscv: add dual vdso creation logic and select vdso based on hw	2026-01-29 02:38:40 -07:00
note.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
rt_sigreturn.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
sys_hwprobe.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
vdso.lds.S	riscv: vdso: Exclude .rodata from the PT_DYNAMIC segment	2025-06-10 13:06:48 -07:00
vdso.S	riscv: compat: vdso: Add COMPAT_VDSO base code implementation	2022-04-26 13:36:53 -07:00
vgetrandom-chacha.S	arch/riscv: compile vdso with landing pad and shadow stack note	2026-01-29 02:38:40 -07:00
vgettimeofday.c	arch: vdso: consolidate gettime prototypes	2023-11-23 11:32:32 +01:00