LXR linux/arch/nds32/include/uapi/asm/sigcontext.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2// Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4#ifndef _ASMNDS32_SIGCONTEXT_H
   5#define _ASMNDS32_SIGCONTEXT_H
   6
   7/*
   8 * Signal context structure - contains all info to do with the state
   9 * before the signal handler was invoked.  Note: only add new entries
  10 * to the end of the structure.
  11 */
  12struct fpu_struct {
  13        unsigned long long fd_regs[32];
  14        unsigned long fpcsr;
  15        /*
  16         * When CONFIG_SUPPORT_DENORMAL_ARITHMETIC is defined, kernel prevents
  17         * hardware from treating the denormalized output as an underflow case
  18         * and rounding it to a normal number. Hence kernel enables the UDF and
  19         * IEX trap in the fpcsr register to step in the calculation.
  20         * However, the UDF and IEX trap enable bit in $fpcsr also lose
  21         * their use.
  22         *
  23         * UDF_IEX_trap replaces the feature of UDF and IEX trap enable bit in
  24         * $fpcsr to control the trap of underflow and inexact. The bit filed
  25         * of UDF_IEX_trap is the same as $fpcsr, 10th bit is used to enable UDF
  26         * exception trapping and 11th bit is used to enable IEX exception
  27         * trapping.
  28         *
  29         * UDF_IEX_trap is only modified through fp_udfiex_crtl syscall.
  30         * Therefore, UDF_IEX_trap needn't be saved and restored in each
  31         * context switch.
  32         */
  33        unsigned long UDF_IEX_trap;
  34};
  35
  36struct zol_struct {
  37        unsigned long nds32_lc; /* $LC */
  38        unsigned long nds32_le; /* $LE */
  39        unsigned long nds32_lb; /* $LB */
  40};
  41
  42struct sigcontext {
  43        unsigned long trap_no;
  44        unsigned long error_code;
  45        unsigned long oldmask;
  46        unsigned long nds32_r0;
  47        unsigned long nds32_r1;
  48        unsigned long nds32_r2;
  49        unsigned long nds32_r3;
  50        unsigned long nds32_r4;
  51        unsigned long nds32_r5;
  52        unsigned long nds32_r6;
  53        unsigned long nds32_r7;
  54        unsigned long nds32_r8;
  55        unsigned long nds32_r9;
  56        unsigned long nds32_r10;
  57        unsigned long nds32_r11;
  58        unsigned long nds32_r12;
  59        unsigned long nds32_r13;
  60        unsigned long nds32_r14;
  61        unsigned long nds32_r15;
  62        unsigned long nds32_r16;
  63        unsigned long nds32_r17;
  64        unsigned long nds32_r18;
  65        unsigned long nds32_r19;
  66        unsigned long nds32_r20;
  67        unsigned long nds32_r21;
  68        unsigned long nds32_r22;
  69        unsigned long nds32_r23;
  70        unsigned long nds32_r24;
  71        unsigned long nds32_r25;
  72        unsigned long nds32_fp; /* $r28 */
  73        unsigned long nds32_gp; /* $r29 */
  74        unsigned long nds32_lp; /* $r30 */
  75        unsigned long nds32_sp; /* $r31 */
  76        unsigned long nds32_ipc;
  77        unsigned long fault_address;
  78        unsigned long used_math_flag;
  79        /* FPU Registers */
  80        struct fpu_struct fpu;
  81        struct zol_struct zol;
  82};
  83
  84#endif
  85