diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h | 179 |
1 files changed, 175 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h index f62b542b2f..03ec8ae791 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sys/ucontext.h @@ -1,7 +1,29 @@ +/* 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 +#define _SYS_UCONTEXT_H 1 +#include <features.h> #include <signal.h> +#include <bits/wordsize.h> + +#if __WORDSIZE == 64 #define MC_TSTATE 0 #define MC_PC 1 @@ -56,12 +78,161 @@ typedef struct { mc_fpu_t mc_fpregs; } mcontext_t; -struct ucontext { +typedef struct ucontext { struct ucontext *uc_link; unsigned long uc_flags; unsigned long uc_sigmask; mcontext_t uc_mcontext; -}; -typedef struct ucontext ucontext_t; +} ucontext_t; + +#else /* __WORDSIZE == 32 */ + +/* + * 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_nPC (2) +#define REG_Y (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) + +/* + * 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 19. + */ +#define NGREG 19 + +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). SPARC_MAXWINDOW is the + * maximum number of outstanding regiters window defined in the SPARC + * architecture (*not* implementation). + */ +#define SPARC_MAXREGWINDOW 31 /* max windows in SPARC 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[SPARC_MAXREGWINDOW]; + struct rwindow wbuf[SPARC_MAXREGWINDOW]; + } gwindows_t; + +/* + * Floating point definitions. + */ + +#define MAXFPQ 16 /* max # of fpu queue entries currently supported */ + +/* + * struct fq defines the minimal format of a floating point instruction queue + * entry. The size of entries in the floating point queue are implementation + * dependent. The union FQu is guarenteed to be the first field in any ABI + * conformant system implementation. Any additional fields provided by an + * implementation should not be used applications designed to be ABI conformant. */ + +struct fpq + { + unsigned long *fpq_addr; /* address */ + unsigned long fpq_instr; /* instruction */ + }; + +struct fq + { + union /* FPU inst/addr queue */ + { + double whole; + struct fpq fpq; + } FQu; + }; + +#define FPU_REGS_TYPE unsigned +#define FPU_DREGS_TYPE unsigned long long +#define V7_FPU_FSR_TYPE unsigned +#define V9_FPU_FSR_TYPE unsigned long long +#define V9_FPU_FPRS_TYPE unsigned + +typedef struct fpu + { + union { /* FPU floating point regs */ + unsigned long long fpu_regs[32]; /* 32 singles */ + double fpu_dregs[16]; /* 16 doubles */ + } fpu_fr; + struct fq *fpu_q; /* ptr to array of FQ entries */ + unsigned fpu_fsr; /* FPU status register */ + unsigned char fpu_qcnt; /* # of entries in saved FQ */ + unsigned char fpu_q_entrysize; /* # of bytes per FQ entry */ + unsigned char fpu_en; /* flag signifying fpu in use */ + } fpregset_t; + +/* + * The following structure is for associating extra register state with + * the ucontext structure and is kept within the uc_mcontext filler area. + * + * If (xrs_id == XRS_ID) then the xrs_ptr field is a valid pointer to + * extra register state. The exact format of the extra register state + * pointed to by xrs_ptr is platform-dependent. + * + * Note: a platform may or may not manage extra register state. + */ +typedef struct + { + unsigned int xrs_id; /* indicates xrs_ptr validity */ + void * xrs_ptr; /* ptr to extra reg state */ + } xrs_t; + +#define XRS_ID 0x78727300 /* the string "xrs" */ + +typedef struct + { + gregset_t gregs; /* general register set */ + gwindows_t *gwins; /* POSSIBLE pointer to register windows */ + fpregset_t fpregs; /* floating point register set */ + xrs_t xrs; /* POSSIBLE extra register state association */ + long filler[19]; + } mcontext_t; + + +/* Userlevel context. */ +typedef struct ucontext + { + unsigned long uc_flags; + struct ucontext *uc_link; + unsigned long uc_sigmask[4]; /* a svr4 sigset_t */ + stack_t uc_stack; + mcontext_t uc_mcontext; + long uc_filler[23]; + } ucontext_t; +#endif /* __WORDSIZE == 32 */ #endif /* sys/ucontext.h */ |