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d57cb31910
This patch fixes various miscellaneous namespace issues in sys/ucontext.h headers. Some struct tags are removed where the structs also have *_t typedef names, while other struct tags without such names are renamed to start __; the changes are noted in NEWS as they can affect C++ name mangling (although there seems to be little if any external use of these types, at least based on checking codesearch.debian.net). For powerpc, pointers to struct pt_regs (not defined in this header) are changed to point to struct __ctx(pt_regs), so in the __USE_MISC case those struct fields continue to point to the existing struct pt_regs type for maximum compatibility, while when that's a namespace issue they point to a struct __pt_regs type which is always an incomplete struct. Tested for affected architectures with build-many-glibcs.py. [BZ #21457] * sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (fpregset_t): Remove struct tag. * sysdeps/unix/sysv/linux/mips/sys/ucontext.h (fpregset_t): Likewise. * sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (mcontext_t): Likewise. * sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h (pt_regs): Declare struct type with __ctx. [__WORDSIZE != 32] (mcontext_t): Use __ctx with pt_regs struct tag. (ucontext_t) [__WORDSIZE == 32]: Use __ctx with pt_regs struct tag and regs field name.
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/* Copyright (C) 1997-2017 Free Software Foundation, Inc. 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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/* Don't rely on this, the interface is currently messed up and may need to
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be broken to be fixed. */
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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/sigcontext.h>
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#include <bits/types/stack_t.h>
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#include <sgidefs.h>
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/* Type for general register. Even in o32 we assume 64-bit registers,
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like the kernel. */
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__extension__ typedef unsigned long long int greg_t;
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/* Number of general registers. */
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#define __NGREG 32
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#define __NFPREG 32
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#ifdef __USE_MISC
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# define NGREG __NGREG
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# define NFPREG __NFPREG
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#endif
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/* Container for all general registers. */
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typedef greg_t gregset_t[__NGREG];
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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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/* Container for all FPU registers. */
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typedef struct {
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union {
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double __ctx(fp_dregs)[__NFPREG];
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struct {
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float _fp_fregs;
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unsigned int _fp_pad;
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} __ctx(fp_fregs)[__NFPREG];
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} __ctx(fp_r);
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} fpregset_t;
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/* Context to describe whole processor state. */
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#if _MIPS_SIM == _ABIO32
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/* Earlier versions of glibc for mips had an entirely different
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definition of mcontext_t, that didn't even resemble the
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corresponding kernel data structure. Fortunately, makecontext,
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[gs]etcontext et all were not implemented back then, so this can
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still be rectified. */
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typedef struct
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{
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unsigned int __ctx(regmask);
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unsigned int __ctx(status);
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greg_t __ctx(pc);
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gregset_t __ctx(gregs);
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fpregset_t __ctx(fpregs);
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unsigned int __ctx(fp_owned);
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unsigned int __ctx(fpc_csr);
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unsigned int __ctx(fpc_eir);
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unsigned int __ctx(used_math);
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unsigned int __ctx(dsp);
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greg_t __ctx(mdhi);
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greg_t __ctx(mdlo);
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unsigned long __ctx(hi1);
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unsigned long __ctx(lo1);
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unsigned long __ctx(hi2);
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unsigned long __ctx(lo2);
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unsigned long __ctx(hi3);
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unsigned long __ctx(lo3);
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} mcontext_t;
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#else
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typedef struct
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{
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gregset_t __ctx(gregs);
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fpregset_t __ctx(fpregs);
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greg_t __ctx(mdhi);
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greg_t __ctx(hi1);
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greg_t __ctx(hi2);
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greg_t __ctx(hi3);
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greg_t __ctx(mdlo);
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greg_t __ctx(lo1);
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greg_t __ctx(lo2);
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greg_t __ctx(lo3);
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greg_t __ctx(pc);
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unsigned int __ctx(fpc_csr);
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unsigned int __ctx(used_math);
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unsigned int __ctx(dsp);
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unsigned int __glibc_reserved1;
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} mcontext_t;
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#endif
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#undef __ctx
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/* Userlevel context. */
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typedef struct ucontext_t
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{
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unsigned long int uc_flags;
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struct ucontext_t *uc_link;
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stack_t uc_stack;
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mcontext_t uc_mcontext;
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sigset_t uc_sigmask;
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} ucontext_t;
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#endif /* sys/ucontext.h */
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