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305 lines
8.1 KiB
C
305 lines
8.1 KiB
C
/* Copyright (C) 1998-2020 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, see
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<https://www.gnu.org/licenses/>. */
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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 <bits/types/sigset_t.h>
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#include <bits/types/stack_t.h>
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#include <bits/wordsize.h>
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#ifdef __USE_MISC
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# define __ctx(fld) fld
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#else
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# define __ctx(fld) __ ## fld
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#endif
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#if __WORDSIZE == 64
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#define __MC_NGREG 19
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#ifdef __USE_MISC
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# define MC_TSTATE 0
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# define MC_PC 1
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# define MC_NPC 2
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# define MC_Y 3
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# define MC_G1 4
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# define MC_G2 5
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# define MC_G3 6
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# define MC_G4 7
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# define MC_G5 8
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# define MC_G6 9
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# define MC_G7 10
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# define MC_O0 11
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# define MC_O1 12
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# define MC_O2 13
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# define MC_O3 14
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# define MC_O4 15
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# define MC_O5 16
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# define MC_O6 17
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# define MC_O7 18
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# define MC_NGREG __MC_NGREG
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#endif
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typedef unsigned long mc_greg_t;
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typedef mc_greg_t mc_gregset_t[__MC_NGREG];
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#ifdef __USE_MISC
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# define MC_MAXFPQ 16
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#endif
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struct __mc_fq {
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unsigned long *__ctx(mcfq_addr);
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unsigned int __ctx(mcfq_insn);
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};
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typedef struct {
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union {
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unsigned int __ctx(sregs)[32];
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unsigned long __ctx(dregs)[32];
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long double __ctx(qregs)[16];
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} __ctx(mcfpu_fregs);
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unsigned long __ctx(mcfpu_fsr);
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unsigned long __ctx(mcfpu_fprs);
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unsigned long __ctx(mcfpu_gsr);
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struct __mc_fq *__ctx(mcfpu_fq);
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unsigned char __ctx(mcfpu_qcnt);
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unsigned char __ctx(mcfpu_qentsz);
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unsigned char __ctx(mcfpu_enab);
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} mc_fpu_t;
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typedef struct {
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mc_gregset_t __ctx(mc_gregs);
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mc_greg_t __ctx(mc_fp);
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mc_greg_t __ctx(mc_i7);
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mc_fpu_t __ctx(mc_fpregs);
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} mcontext_t;
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typedef struct ucontext_t {
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struct ucontext_t *uc_link;
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unsigned long __ctx(uc_flags);
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unsigned long __uc_sigmask;
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mcontext_t uc_mcontext;
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stack_t uc_stack;
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sigset_t uc_sigmask;
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} ucontext_t;
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#endif /* __WORDISIZE == 64 */
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/*
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* Location of the users' stored registers relative to R0.
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* Usage is as an index into a gregset_t array or as u.u_ar0[XX].
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*/
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#ifdef __USE_MISC
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# define REG_PSR (0)
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# define REG_PC (1)
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# define REG_nPC (2)
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# define REG_Y (3)
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# define REG_G1 (4)
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# define REG_G2 (5)
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# define REG_G3 (6)
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# define REG_G4 (7)
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# define REG_G5 (8)
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# define REG_G6 (9)
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# define REG_G7 (10)
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# define REG_O0 (11)
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# define REG_O1 (12)
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# define REG_O2 (13)
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# define REG_O3 (14)
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# define REG_O4 (15)
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# define REG_O5 (16)
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# define REG_O6 (17)
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# define REG_O7 (18)
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#endif
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/*
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* A gregset_t is defined as an array type for compatibility with the reference
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* source. This is important due to differences in the way the C language
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* treats arrays and structures as parameters.
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*
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* Note that NGREG is really (sizeof (struct regs) / sizeof (greg_t)),
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* but that the ABI defines it absolutely to be 21 (resp. 19).
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*/
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#if __WORDSIZE == 64
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# define __NGREG 21
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# ifdef __USE_MISC
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# define REG_ASI (19)
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# define REG_FPRS (20)
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# define NGREG __NGREG
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# endif
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typedef long greg_t;
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#else /* __WORDSIZE == 32 */
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# define __NGREG 19
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# ifdef __USE_MISC
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# define NGREG __NGREG
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# endif
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typedef int greg_t;
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#endif /* __WORDSIZE == 32 */
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typedef greg_t gregset_t[__NGREG];
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/*
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* The following structures define how a register window can appear on the
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* stack. This structure is available (when required) through the `gwins'
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* field of an mcontext (nested within ucontext). SPARC_MAXWINDOW is the
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* maximum number of outstanding regiters window defined in the SPARC
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* architecture (*not* implementation).
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*/
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# define __SPARC_MAXREGWINDOW 31 /* max windows in SPARC arch. */
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#ifdef __USE_MISC
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# define SPARC_MAXREGWINDOW __SPARC_MAXREGWINDOW
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#endif
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struct __rwindow
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{
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greg_t __ctx(rw_local)[8]; /* locals */
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greg_t __ctx(rw_in)[8]; /* ins */
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};
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#ifdef __USE_MISC
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# define rw_fp __ctx(rw_in)[6] /* frame pointer */
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# define rw_rtn __ctx(rw_in)[7] /* return address */
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#endif
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typedef struct
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{
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int __ctx(wbcnt);
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int *__ctx(spbuf)[__SPARC_MAXREGWINDOW];
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struct __rwindow __ctx(wbuf)[__SPARC_MAXREGWINDOW];
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} gwindows_t;
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/*
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* Floating point definitions.
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*/
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#ifdef __USE_MISC
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# define MAXFPQ 16 /* max # of fpu queue entries currently supported */
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#endif
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/*
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* struct fq defines the minimal format of a floating point instruction queue
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* entry. The size of entries in the floating point queue are implementation
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* dependent. The union FQu is guarenteed to be the first field in any ABI
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* conformant system implementation. Any additional fields provided by an
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* implementation should not be used applications designed to be ABI conformant. */
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struct __fpq
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{
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unsigned long *__ctx(fpq_addr); /* address */
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unsigned long __ctx(fpq_instr); /* instruction */
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};
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struct __fq
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{
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union /* FPU inst/addr queue */
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{
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double __ctx(whole);
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struct __fpq __ctx(fpq);
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} __ctx(FQu);
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};
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#ifdef __USE_MISC
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# define FPU_REGS_TYPE unsigned
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# define FPU_DREGS_TYPE unsigned long long
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# define V7_FPU_FSR_TYPE unsigned
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# define V9_FPU_FSR_TYPE unsigned long long
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# define V9_FPU_FPRS_TYPE unsigned
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#endif
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#if __WORDSIZE == 64
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typedef struct
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{
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union { /* FPU floating point regs */
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unsigned __ctx(fpu_regs)[32]; /* 32 singles */
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double __ctx(fpu_dregs)[32]; /* 32 doubles */
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long double __ctx(fpu_qregs)[16]; /* 16 quads */
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} __ctx(fpu_fr);
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struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
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unsigned long __ctx(fpu_fsr); /* FPU status register */
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unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
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unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
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unsigned char __ctx(fpu_en); /* flag signifying fpu in use */
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} fpregset_t;
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#else /* __WORDSIZE == 32 */
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typedef struct
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{
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union { /* FPU floating point regs */
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__extension__ unsigned long long __ctx(fpu_regs)[32]; /* 32 singles */
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double __ctx(fpu_dregs)[16]; /* 16 doubles */
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} __ctx(fpu_fr);
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struct __fq *__ctx(fpu_q); /* ptr to array of FQ entries */
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unsigned __ctx(fpu_fsr); /* FPU status register */
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unsigned char __ctx(fpu_qcnt); /* # of entries in saved FQ */
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unsigned char __ctx(fpu_q_entrysize); /* # of bytes per FQ entry */
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unsigned char __ctx(fpu_en); /* flag signifying fpu in use */
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} fpregset_t;
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/*
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* The following structure is for associating extra register state with
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* the ucontext structure and is kept within the uc_mcontext filler area.
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*
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* If (xrs_id == XRS_ID) then the xrs_ptr field is a valid pointer to
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* extra register state. The exact format of the extra register state
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* pointed to by xrs_ptr is platform-dependent.
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*
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* Note: a platform may or may not manage extra register state.
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*/
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typedef struct
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{
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unsigned int __ctx(xrs_id); /* indicates xrs_ptr validity */
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void * __ctx(xrs_ptr); /* ptr to extra reg state */
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} xrs_t;
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#ifdef __USE_MISC
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# define XRS_ID 0x78727300 /* the string "xrs" */
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#endif
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typedef struct
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{
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gregset_t __ctx(gregs); /* general register set */
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gwindows_t *__ctx(gwins); /* POSSIBLE pointer to register
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windows */
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fpregset_t __ctx(fpregs); /* floating point register set */
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xrs_t __ctx(xrs); /* POSSIBLE extra register state
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association */
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long __glibc_reserved1[19];
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} mcontext_t;
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/* Userlevel context. */
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typedef struct ucontext_t
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{
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unsigned long __ctx(uc_flags);
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struct ucontext_t *uc_link;
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sigset_t uc_sigmask;
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stack_t uc_stack;
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mcontext_t uc_mcontext;
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} ucontext_t;
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#endif /* __WORDSIZE == 32 */
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#endif /* sys/ucontext.h */
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