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- From 600d06cb443526020efa411053b83fc1697f27dc Mon Sep 17 00:00:00 2001
- From: Ramin Moussavi <ramin.moussavi@yacoub.de>
- Date: Fri, 21 Aug 2026 17:18:05 +0200
- Subject: [PATCH 2/6] 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 <ramin.moussavi@yacoub.de>
- ---
- arch/microblaze/kernel/syscalls/syscall.tbl | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
- 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
- --
- 2.47.3
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