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54ee14b388
2003-09-23 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions [libc] (GLIBC_2.3.3): Add setcontext, getcontext, swapcontext, and makecontext. * sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: Correct change for include Altivec support for PPC32. It was not compatible. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h: Adjust offsets for ucontext_t change. * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S: Adjust for ucontext_t change. Add compatibility code. * sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S: Likewise. Patch by Paul Mackerras <paulus@samba.org>. 2003-02-25 Randolph Chung <tausq@debian.org> * sysdeps/hppa/Makefile: Include compat code in build. * sysdeps/hppa/libgcc-compat.c: New file. * sysdeps/hppa/Dist: Add libgcc-compat.c. * sysdeps/hppa/Versions [GLIBC_2.2]: Add __clz_tab.
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/* Copyright (C) 1998, 1999, 2002 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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 <signal.h>
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/* We need the signal context definitions even if they are not used
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included in <signal.h>. */
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#include <bits/sigcontext.h>
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#if __WORDSIZE == 32
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/* Number of general registers. */
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#define NGREG 48
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/* Container for all general registers. */
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typedef unsigned long gregset_t[NGREG];
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/* Container for floating-point registers and status */
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typedef struct _libc_fpstate
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{
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double fpregs[32];
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double fpscr;
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unsigned int _pad[2];
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} fpregset_t;
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/* Container for Altivec/VMX registers and status.
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Needs to be aligned on a 16-byte boundary. */
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typedef struct _libc_vrstate
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{
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unsigned int vrregs[32][4];
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unsigned int vscr;
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unsigned int vrsave;
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unsigned int _pad[2];
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} vrregset_t;
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/* Context to describe whole processor state. */
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typedef struct
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{
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gregset_t gregs;
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fpregset_t fpregs;
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vrregset_t vrregs __attribute__((__aligned__(16)));
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} mcontext_t;
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#else
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/* For 64-bit, a machine context is exactly a sigcontext. */
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typedef struct sigcontext mcontext_t;
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#endif
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/* Userlevel context. */
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typedef struct ucontext
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{
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unsigned long int uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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#if __WORDSIZE == 32
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/*
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* These fields are set up this way to maximize source and
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* binary compatibility with code written for the old
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* ucontext_t definition, which didn't include space for the
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* registers.
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*
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* Different versions of the kernel have stored the registers on
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* signal delivery at different offsets from the ucontext struct.
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* Programs should thus use the uc_mcontext.uc_regs pointer to
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* find where the registers are actually stored. The registers
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* will be stored within the ucontext_t struct but not necessarily
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* at a fixed address. As a side-effect, this lets us achieve
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* 16-byte alignment for the register storage space if the
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* Altivec registers are to be saved, without requiring 16-byte
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* alignment on the whole ucontext_t.
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*
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* The uc_mcontext.regs field is included for source compatibility
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* with programs written against the older ucontext_t definition,
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* and its name should therefore not change. The uc_pad field
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* is for binary compatibility with programs compiled against the
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* old ucontext_t; it ensures that uc_mcontext.regs and uc_sigmask
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* are at the same offset as previously.
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*/
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int uc_pad[7];
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union uc_regs_ptr {
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struct pt_regs *regs;
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mcontext_t *uc_regs;
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} uc_mcontext;
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sigset_t uc_sigmask;
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char uc_reg_space[sizeof(mcontext_t) + 12]; /* last for extensibility */
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#else /* 64-bit */
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sigset_t uc_sigmask;
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mcontext_t uc_mcontext; /* last for extensibility */
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#endif
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} ucontext_t;
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#endif /* sys/ucontext.h */
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