From 730e01d932496f7bd536fc185d3aab6646dea0f4 Mon Sep 17 00:00:00 2001 From: Ramin Moussavi Date: Fri, 21 Aug 2026 17:18:05 +0200 Subject: microblaze: wire up sigaltstack sigaltstack is wired to sys_ni_syscall - microblaze is the only architecture without it - although the microblaze signal delivery code fully supports the alternate signal stack: get_sigframe() picks the stack via sigsp(), setup_rt_frame() saves it with __save_altstack() and sys_rt_sigreturn() calls restore_altstack(). Wire it up to sys_sigaltstack. Tested on qemu petalogix-s3adsp1800 (microblazeel) with the uClibc-ng test suite: the five sigaltstack-dependent NPTL tests (tst-cancel20/21, tst-cancelx20/21, tst-signal6) pass; before this change sigaltstack() returned ENOSYS. Assisted-by: Claude:claude-opus-5 Signed-off-by: Ramin Moussavi Tested-by: Waldemar Brodkorb Link: https://patch.msgid.link/20260821151809.1233057-2-ramin.moussavi@yacoub.de Signed-off-by: Michal Simek --- arch/microblaze/kernel/syscalls/syscall.tbl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index c55a5c96f49b..76d7cbe2a133 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -193,7 +193,7 @@ 183 common getcwd sys_getcwd 184 common capget sys_capget 185 common capset sys_capset -186 common sigaltstack sys_ni_syscall +186 common sigaltstack sys_sigaltstack 187 common sendfile sys_sendfile 188 common getpmsg sys_ni_syscall 189 common putpmsg sys_ni_syscall -- cgit v1.2.3