H.J. Lu bf6465d046 i386: Properly pop restore token in signal frame ... Linux CET kernel places a restore token on shadow stack for signal handler to enhance security. The restore token is 8 byte and aligned to 8 bytes. It is usually transparent to user programs since kernel will pop the restore token when signal handler returns. But when an exception is thrown from a signal handler, now we need to pop the restore token from shadow stack. For x86-64, we just need to treat the signal frame as normal frame. For i386, we need to search for the restore token to check if the original shadow stack is 8 byte aligned. If the original shadow stack is 8 byte aligned, we just need to pop 2 slots, one restore token, from shadow stack. Otherwise, we need to pop 3 slots, one restore token + 4 byte padding, from shadow stack. This patch also includes 2 tests, one has a restore token with 4 byte padding and one without. Tested on Linux/x86-64 CET machine with and without -m32. libgcc/ PR libgcc/85334 * config/i386/shadow-stack-unwind.h (_Unwind_Frames_Increment): New. gcc/testsuite/ PR libgcc/85334 * g++.target/i386/pr85334-1.C: New test. * g++.target/i386/pr85334-2.C: Likewise.		2020-02-10 07:59:10 -08:00
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aarch64	Update copyright years.	2020-01-01 12:51:42 +01:00
alpha	Update copyright years.	2020-01-01 12:51:42 +01:00
arc	[ARC] Make libgcc compatible with ARC's reduced register set config.	2020-01-27 14:51:03 +02:00
arm	arm: Fix up arm installed unwind.h for use in pedantic modes [PR93615]	2020-02-07 11:01:14 +01:00
avr	Typo.	2020-01-14 11:14:23 +01:00
bfin	Update copyright years.	2020-01-01 12:51:42 +01:00
bpf	GCC port for eBPF	2019-09-09 12:13:23 +02:00
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cr16	Update copyright years.	2020-01-01 12:51:42 +01:00
cris	libgcc: cris: config/cris/arit.c (DS): Apply attribute __fallthrough__.	2020-01-18 16:38:56 +01:00
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gcn	[amdgcn] Remove dependency on stdint.h in libgcc	2020-01-10 23:19:41 +00:00
h8300	Update copyright years.	2020-01-01 12:51:42 +01:00
i386	i386: Properly pop restore token in signal frame	2020-02-10 07:59:10 -08:00
ia64	Update copyright years.	2020-01-01 12:51:42 +01:00
iq2000	Update copyright years.	2020-01-01 12:51:42 +01:00
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mips	Emit .note.GNU-stack for hard-float linux targets.	2020-01-23 17:00:03 +01:00
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nios2	nios2: Support for GOT-relative DW_EH_PE_datarel encoding.	2020-01-31 16:46:50 -08:00
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pdp11	t-pdp11 (LIB2ADD): Add divmod.c.	2018-11-01 14:36:52 -04:00
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darwin10-unwind-find-enc-func.c	Move Darwin10 unwinder fix to a crt shim.	2018-08-22 11:58:43 +00:00
darwin-64.c	Update copyright years.	2020-01-01 12:51:42 +01:00
darwin-crt3.c	Update copyright years.	2020-01-01 12:51:42 +01:00
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gthr-vxworks.h	Guard inclusion of vxAtomicLib.h from gthr-vxworks.h	2020-01-05 12:45:54 +00:00
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libgcc-glibc.ver	Update copyright years.	2020-01-01 12:51:42 +01:00
libgcc-libsystem.ver
no-sfp-machine.h
no-unwind.h
t-crtfm
t-crtstuff-pic
t-darwin	[Darwin] Some TLC for older Darwin versions.	2019-07-03 18:36:28 +00:00
t-dfprules
t-eh-dw2-dip
t-fdpbit
t-fixedpoint-gnu-prefix
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t-gthr-noweak	musl: Don't use gthr weak refs in libgcc PR91737	2019-11-18 12:08:18 +00:00
t-gthr-vxworks	Improve the thread support for VxWorks	2019-11-14 15:58:31 +00:00
t-gthr-vxworksae	Update the libgcc support for VxWorks AE/653	2019-11-14 16:00:55 +00:00
t-hardfp	Update copyright years.	2020-01-01 12:51:42 +01:00
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t-slibgcc-sld	Use v2 map syntax in libgcc-unwind.map if Solaris ld supports it	2018-09-18 07:04:15 +00:00
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t-vxcrtstuff	Introduce vxworks specific crtstuff support	2019-11-14 15:53:23 +00:00
t-vxworks	Improve the thread support for VxWorks	2019-11-14 15:58:31 +00:00
t-vxworks7	Improve the thread support for VxWorks	2019-11-14 15:58:31 +00:00
t-vxworksae	Update the libgcc support for VxWorks AE/653	2019-11-14 16:00:55 +00:00
unwind-dw2-fde-darwin.c	Update copyright years.	2020-01-01 12:51:42 +01:00
vxcache.c	Update copyright years.	2020-01-01 12:51:42 +01:00
vxcrtstuff.c	Fix typo in macro name guarding conditional in vxcrtstuff.c	2019-12-30 21:11:22 +00:00