Will Deacon 9a96428557 arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction ... For better or worse, GDB relies on the exact instruction sequence in the VDSO sigreturn trampoline in order to unwind from signals correctly. Commit c91db232da ("arm64: vdso: Convert to modern assembler annotations") unfortunately added a BTI C instruction to the start of __kernel_rt_sigreturn, which breaks this check. Thankfully, it's also not required, since the trampoline is called from a RET instruction when returning from the signal handler Remove the unnecessary BTI C instruction from __kernel_rt_sigreturn, and do the same for the 32-bit VDSO as well for good measure. Cc: Daniel Kiss <daniel.kiss@arm.com> Cc: Tamas Zsoldos <tamas.zsoldos@arm.com> Reviewed-by: Dave Martin <dave.martin@arm.com> Reviewed-by: Mark Brown <broonie@kernel.org> Fixes: c91db232da ("arm64: vdso: Convert to modern assembler annotations") Signed-off-by: Will Deacon <will@kernel.org>		2020-05-21 12:57:18 +01:00
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.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Makefile	arm64: vdso32: Enable Clang Compilation	2020-03-21 15:24:03 +01:00
note.c	arm64: compat: Add vDSO	2019-06-22 21:21:08 +02:00
sigreturn.S	arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction	2020-05-21 12:57:18 +01:00
vdso.lds.S	arm64: compat: Add vDSO	2019-06-22 21:21:08 +02:00
vdso.S	arm64: compat: Add vDSO	2019-06-22 21:21:08 +02:00
vgettimeofday.c	arm64: vdso32: Include common headers in the vdso library	2020-03-21 15:24:02 +01:00