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c739e191d0
The uc_mcontext.__reserved member of ucontext_t is a user visible API,
that should not be changed, because this is the only way to access cpu
states of various extensions of linux asm/sigcontext.h, it does not
violate namespace rules either, so revert this part of the commit
commit 4fa9b3bfe6
Commit: Joseph Myers <joseph@codesourcery.com>
Fix mcontext_t sigcontext namespace (bug 21457).
(In principle the user can type cast &uc_mcontext to struct sigcontext*
to use the linux sigcontext fields, but that's not the existing practice
since mcontext_t used to be a typedef of struct sigcontext.)
[BZ #22742]
* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__glibc_reserved1):
Rename to __reserved and add comment.
* sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (__glibc_reserved1):
Rename to __reserved.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/* Copyright (C) 1998-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* System V/AArch64 ABI compliant context switching support. */
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#ifndef _SYS_UCONTEXT_H
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#define _SYS_UCONTEXT_H 1
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#include <features.h>
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#include <bits/types/sigset_t.h>
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#include <bits/types/stack_t.h>
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#ifdef __USE_MISC
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# define __ctx(fld) fld
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#else
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# define __ctx(fld) __ ## fld
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#endif
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#ifdef __USE_MISC
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# include <sys/procfs.h>
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typedef elf_greg_t greg_t;
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/* Container for all general registers. */
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typedef elf_gregset_t gregset_t;
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/* Structure to describe FPU registers. */
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typedef elf_fpregset_t fpregset_t;
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#endif
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/* Context to describe whole processor state. This only describes
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the core registers; coprocessor registers get saved elsewhere
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(e.g. in uc_regspace, or somewhere unspecified on the stack
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during non-RT signal handlers). */
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typedef struct
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{
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unsigned long long int __ctx(fault_address);
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unsigned long long int __ctx(regs)[31];
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unsigned long long int __ctx(sp);
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unsigned long long int __ctx(pc);
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unsigned long long int __ctx(pstate);
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/* This field contains extension records for additional processor
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state such as the FP/SIMD state. It has to match the definition
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of the corresponding field in the sigcontext struct, see the
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arch/arm64/include/uapi/asm/sigcontext.h linux header for details. */
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unsigned char __reserved[4096] __attribute__ ((__aligned__ (16)));
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} mcontext_t;
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/* Userlevel context. */
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typedef struct ucontext_t
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{
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unsigned long __ctx(uc_flags);
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struct ucontext_t *uc_link;
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stack_t uc_stack;
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sigset_t uc_sigmask;
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mcontext_t uc_mcontext;
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} ucontext_t;
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#undef __ctx
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#endif /* sys/ucontext.h */
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