| /* Copyright (C) 1998-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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_UCONTEXT_H |
| #define _SYS_UCONTEXT_H 1 |
| |
| #include <features.h> |
| |
| #include <bits/types/sigset_t.h> |
| #include <bits/types/stack_t.h> |
| |
| |
| #ifdef __USE_MISC |
| # define __ctx(fld) fld |
| #else |
| # define __ctx(fld) __ ## fld |
| #endif |
| |
| /* |
| * These are here mostly for backwards compatibility with older Unices. |
| * IA-64 Linux does not distinguish between "mcontext_t" and |
| * "ucontext_t" as all the necessary info is inside the former. |
| */ |
| |
| struct __ia64_fpreg_mcontext |
| { |
| union |
| { |
| unsigned long __ctx(bits)[2]; |
| } __ctx(u); |
| } __attribute__ ((__aligned__ (16))); |
| |
| typedef struct |
| { |
| unsigned long int __ctx(sc_flags); |
| unsigned long int __ctx(sc_nat); |
| stack_t __ctx(sc_stack); |
| unsigned long int __ctx(sc_ip); |
| unsigned long int __ctx(sc_cfm); |
| unsigned long int __ctx(sc_um); |
| unsigned long int __ctx(sc_ar_rsc); |
| unsigned long int __ctx(sc_ar_bsp); |
| unsigned long int __ctx(sc_ar_rnat); |
| unsigned long int __ctx(sc_ar_ccv); |
| unsigned long int __ctx(sc_ar_unat); |
| unsigned long int __ctx(sc_ar_fpsr); |
| unsigned long int __ctx(sc_ar_pfs); |
| unsigned long int __ctx(sc_ar_lc); |
| unsigned long int __ctx(sc_pr); |
| unsigned long int __ctx(sc_br)[8]; |
| unsigned long int __ctx(sc_gr)[32]; |
| struct __ia64_fpreg_mcontext __ctx(sc_fr)[128]; |
| unsigned long int __ctx(sc_rbs_base); |
| unsigned long int __ctx(sc_loadrs); |
| unsigned long int __ctx(sc_ar25); |
| unsigned long int __ctx(sc_ar26); |
| unsigned long int __ctx(sc_rsvd)[12]; |
| unsigned long int __ctx(sc_mask); |
| } mcontext_t; |
| |
| #if __GNUC_PREREQ (3, 5) |
| # define _SC_GR0_OFFSET \ |
| __builtin_offsetof (mcontext_t, __ctx(sc_gr)[0]) |
| #elif defined __GNUC__ |
| # define _SC_GR0_OFFSET \ |
| (((char *) &((mcontext_t *) 0)->__ctx(sc_gr)[0]) - (char *) 0) |
| #else |
| # define _SC_GR0_OFFSET 0xc8 /* pray that this is correct... */ |
| #endif |
| |
| typedef struct ucontext_t |
| { |
| union |
| { |
| mcontext_t _mc; |
| struct |
| { |
| unsigned long _pad[_SC_GR0_OFFSET/8]; |
| struct ucontext_t *_link; /* this should overlay sc_gr[0] */ |
| } |
| _uc; |
| } |
| _u; |
| } |
| ucontext_t; |
| |
| #define uc_mcontext _u._mc |
| #define uc_sigmask _u._mc.__ctx(sc_mask) |
| #define uc_stack _u._mc.__ctx(sc_stack) |
| #define uc_link _u._uc._link |
| |
| #endif /* sys/ucontext.h */ |
