/* 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>
#include <bits/wordsize.h>
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
#if __WORDSIZE == 64
#define __MC_NGREG 19
#ifdef __USE_MISC
# define MC_TSTATE 0
# define MC_PC 1
# define MC_NPC 2
# define MC_Y 3
# define MC_G1 4
# define MC_G2 5
# define MC_G3 6
# define MC_G4 7
# define MC_G5 8
# define MC_G6 9
# define MC_G7 10
# define MC_O0 11
# define MC_O1 12
# define MC_O2 13
# define MC_O3 14
# define MC_O4 15
# define MC_O5 16
# define MC_O6 17
# define MC_O7 18
# define MC_NGREG __MC_NGREG
#endif
typedef unsigned long mc_greg_t;
typedef mc_greg_t mc_gregset_t[__MC_NGREG];
#ifdef __USE_MISC
# define MC_MAXFPQ 16
#endif
struct __mc_fq {
unsigned long *__ctx(mcfq_addr);
unsigned int __ctx(mcfq_insn);
};
typedef struct {
union {
unsigned int __ctx(sregs)[32];
unsigned long __ctx(dregs)[32];
long double __ctx(qregs)[16];
} __ctx(mcfpu_fregs);
unsigned long __ctx(mcfpu_fsr);
unsigned long __ctx(mcfpu_fprs);
unsigned long __ctx(mcfpu_gsr);
struct __mc_fq *__ctx(mcfpu_fq);
unsigned char __ctx(mcfpu_qcnt);
unsigned char __ctx(mcfpu_qentsz);
unsigned char __ctx(mcfpu_enab);
} mc_fpu_t;
typedef struct {
mc_gregset_t __ctx(mc_gregs);
mc_greg_t __ctx(mc_fp);
mc_greg_t __ctx(mc_i7);
mc_fpu_t __ctx(mc_fpregs);
} mcontext_t;
typedef struct ucontext_t {
struct ucontext_t *uc_link;
unsigned long __ctx(uc_flags);
unsigned long __uc_sigmask;
mcontext_t uc_mcontext;
stack_t uc_stack;
sigset_t uc_sigmask;
} ucontext_t;
#endif /* __WORDISIZE == 64 */
/*
* 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].
*/
#ifdef __USE_MISC
# 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)
#endif
/*
* 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).
*/
#if __WORDSIZE == 64
# define __NGREG 21
# ifdef __USE_MISC
# define REG_ASI (19)
# define REG_FPRS (20)
# define NGREG __NGREG
# endif
typedef long greg_t;
#else /* __WORDSIZE == 32 */
# define __NGREG 19
# ifdef __USE_MISC
# define NGREG __NGREG
# endif
typedef int greg_t;
#endif /* __WORDSIZE == 32 */
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. */
#ifdef __USE_MISC
# define SPARC_MAXREGWINDOW __SPARC_MAXREGWINDOW
#endif
struct __rwindow
{
greg_t __ctx(rw_local)[8]; /* locals */
greg_t __ctx(rw_in)[8]; /* ins */
};
#ifdef __USE_MISC
# define rw_fp __ctx(rw_in)[6] /* frame pointer */
# define rw_rtn __ctx(rw_in)[7] /* return address */
#endif
typedef struct
{
int __ctx(wbcnt);
int *__ctx(spbuf)[__SPARC_MAXREGWINDOW];
struct __rwindow __ctx(wbuf)[__SPARC_MAXREGWINDOW];
} gwindows_t;
/*
* Floating point definitions.
*/
#ifdef __USE_MISC
# define MAXFPQ 16 /* max # of fpu queue entries currently supported */
#endif
/*
* 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 *__ctx(fpq_addr); /* address */
unsigned long __ctx(fpq_instr); /* instruction */
};
struct __fq
{
union /* FPU inst/addr queue */
{
double __ctx(whole);
struct __fpq __ctx(fpq);
} __ctx(FQu);
};
#ifdef __USE_MISC
# 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
#endif
#if __WORDSIZE == 64
typedef struct
{
union { /* FPU floating point regs */
unsigned __ctx(fpu_regs)[32]; /* 32 singles */
double __ctx(fpu_dregs)[32]; /* 32 doubles */
long double __ctx(fpu_qregs)[16]; /* 16 quads */
} __ctx(fpu_fr);
struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
unsigned long __ctx(fpu_fsr); /* FPU status register */
unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
unsigned char __ctx(fpu_en); /* flag signifying fpu in use */
} fpregset_t;
#else /* __WORDSIZE == 32 */
typedef struct
{
union { /* FPU floating point regs */
__extension__ unsigned long long __ctx(fpu_regs)[32]; /* 32 singles */
double __ctx(fpu_dregs)[16]; /* 16 doubles */
} __ctx(fpu_fr);
struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
unsigned __ctx(fpu_fsr); /* FPU status register */
unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
unsigned char __ctx(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 __ctx(xrs_id); /* indicates xrs_ptr validity */
void * __ctx(xrs_ptr); /* ptr to extra reg state */
} xrs_t;
#ifdef __USE_MISC
# define XRS_ID 0x78727300 /* the string "xrs" */
#endif
typedef struct
{
gregset_t __ctx(gregs); /* general register set */
gwindows_t *__ctx(gwins); /* POSSIBLE pointer to register
windows */
fpregset_t __ctx(fpregs); /* floating point register set */
xrs_t __ctx(xrs); /* POSSIBLE extra register state
association */
long __glibc_reserved1[19];
} mcontext_t;
/* Userlevel context. */
typedef struct ucontext_t
{
unsigned long __ctx(uc_flags);
struct ucontext_t *uc_link;
sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
} ucontext_t;
#endif /* __WORDSIZE == 32 */
#endif /* sys/ucontext.h */