[ELF] Support .cfi_signal_frame
authorFangrui Song <maskray@google.com>
Sat, 8 Aug 2020 05:08:00 +0000 (22:08 -0700)
committerFangrui Song <maskray@google.com>
Sat, 8 Aug 2020 05:08:44 +0000 (22:08 -0700)
commitd30d46193876102a6bc99b527dfaf79be4b09515
treed90d4785579897afbc487dcb4607dcfb87a3bd64
parent754e09f9cef13fb07328169354e38dd86d94a699
[ELF] Support .cfi_signal_frame

glibc/sysdeps/unix/sysv/linux/x86_64/sigaction.c libc.a(sigaction.o) has a CIE
with the augmentation string "zRS". Support 'S' to allow --icf={safe,all}.
lld/ELF/EhFrame.cpp
lld/test/ELF/eh-frame-value-format7.s
lld/test/ELF/icf-eh-frame.s