/* Copyright (C) 1998, 1999 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _SYS_UCONTEXT_H #define _SYS_UCONTEXT_H 1 #include <features.h> #include <signal.h> /* * Location of the users' stored registers relative to R0. * Usage is as an index into a gregset_t array or as u.u_ar0[XX]. */ #define REG_PSR (0) #define REG_PC (1) #define REG_SPARE (2) #define REG_WVALID (3) #define REG_G1 (4) #define REG_G2 (5) #define REG_G3 (6) #define REG_G4 (7) #define REG_G5 (8) #define REG_G6 (9) #define REG_G7 (10) #define REG_O0 (11) #define REG_O1 (12) #define REG_O2 (13) #define REG_O3 (14) #define REG_O4 (15) #define REG_O5 (16) #define REG_O6 (17) #define REG_O7 (18) #define REG_GLOBALS (19) /* * A gregset_t is defined as an array type for compatibility with the reference * source. This is important due to differences in the way the C language * treats arrays and structures as parameters. * * Note that NGREG is really (sizeof (struct regs) / sizeof (greg_t)), * but that the ABI defines it absolutely to be 21 (resp. 19). */ #define NGREG 20 typedef int greg_t; typedef greg_t gregset_t[NGREG]; /* * The following structures define how a register window can appear on the * stack. This structure is available (when required) through the `gwins' * field of an mcontext (nested within ucontext). NIOS_MAXWINDOW is the * maximum number of outstanding register windows defined in the NIOS * architecture (*not* implementation). */ #define NIOS_MAXREGWINDOW 31 /* max windows in NIOS arch. */ struct rwindow { greg_t rw_local[8]; /* locals */ greg_t rw_in[8]; /* ins */ }; #define rw_fp rw_in[6] /* frame pointer */ #define rw_rtn rw_in[7] /* return address */ typedef struct gwindows { int wbcnt; int *spbuf[NIOS_MAXREGWINDOW]; struct rwindow wbuf[NIOS_MAXREGWINDOW]; } gwindows_t; typedef struct { gregset_t gregs; /* general register set */ gwindows_t *gwins; /* POSSIBLE pointer to register windows */ } mcontext_t; /* Userlevel context. */ typedef struct ucontext { unsigned long uc_flags; struct ucontext *uc_link; __sigset_t uc_sigmask; stack_t uc_stack; mcontext_t uc_mcontext; } ucontext_t; #endif /* sys/ucontext.h */