This patchset fixes some bugs in our SME-related signal frame handling for linux-user:
* we need to make the equivalent change to a recent kernel bugfix/ABI change: TPIDR2_EL0 should be cleared when delivering a signal * we forgot the TPIDR2_MAGIC signal frame record (which is necessary for SME v1) * we forgot the ZT_MAGIC signal frame record when implementing SME2 These bugs generally only surface when guest code attempts to unwind an exception from inside a signal handler and SME is involved. Discovered (and the fixes tested) by some new gcc test cases which implement their part of the bugfix/ABI change https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=b5ffc8e75a8 v2: quick respin to address RTH's code review comments. I know I only sent v1 earlier this evening but I wanted to get this out of the door as I'm not going to be working the first half of next week (back Thurs). v1->v2: * patch 1: drop unnecessary if(), update comment * patch 2: do "has sme" check in better place, drop unneeded argument, return type * patch 3: do "has sme" check in better place, check the incoming SVCR value, not the old one thanks -- PMM Peter Maydell (3): linux-user/aarch64: Clear TPIDR2_EL0 when delivering signals linux-user/aarch64: Support TPIDR2_MAGIC signal frame record linux-user/aarch64: Support ZT_MAGIC signal frame record linux-user/aarch64/signal.c | 139 +++++++++++++++++++++++++++++++++++- 1 file changed, 136 insertions(+), 3 deletions(-) -- 2.43.0
