On 22/04/2019 18:56, Mathieu Desnoyers wrote: > diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h b/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h > new file mode 100644 > index 0000000000..e538668612 > --- /dev/null > +++ b/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h > @@ -0,0 +1,44 @@ > +/* Restartable Sequences Linux aarch64 architecture header. > + > + Copyright (C) 2019 Free Software Foundation, Inc. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + <http://www.gnu.org/licenses/>. */ > + > +#ifndef _SYS_RSEQ_H > +# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead." > +#endif > + > +/* RSEQ_SIG is a signature required before each abort handler code. > + > + It is a 32-bit value that maps to actual architecture code compiled > + into applications and libraries. It needs to be defined for each > + architecture. When choosing this value, it needs to be taken into > + account that generating invalid instructions may have ill effects on > + tools like objdump, and may also have impact on the CPU speculative > + execution efficiency in some cases. > + > + aarch64 -mbig-endian generates mixed endianness code vs data: > + little-endian code and big-endian data. Ensure the RSEQ_SIG signature > + matches code endianness. */ > + > +#define RSEQ_SIG_CODE 0xd428bc00 /* BRK #0x45E0. */ > + > +#ifdef __AARCH64EB__ > +#define RSEQ_SIG_DATA 0x00bc28d4 /* BRK #0x45E0. */ > +#else > +#define RSEQ_SIG_DATA RSEQ_SIG_CODE > +#endif > + > +#define RSEQ_SIG RSEQ_SIG_DATA > diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist > index 9c330f325e..331f39e41a 100644 > --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist > @@ -2141,3 +2141,5 @@ GLIBC_2.28 thrd_yield F > GLIBC_2.29 getcpu F > GLIBC_2.29 posix_spawn_file_actions_addchdir_np F > GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F > +GLIBC_2.30 __rseq_abi T 0x20 > +GLIBC_2.30 __rseq_handled D 0x4 the aarch64 changes are ok.
