gdb/nat/aarch64-sve-linux-ptrace.h

   1 /* Common target dependent for AArch64 systems.
   2
   3    Copyright (C) 2018 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef AARCH64_SVE_LINUX_PTRACE_H
  21 #define AARCH64_SVE_LINUX_PTRACE_H
  22
  23 /* Where indicated, this file contains defines and macros lifted directly from
  24    the Linux kernel headers, with no modification.
  25    Refer to Linux kernel documentation for details.  */
  26
  27 #include <asm/sigcontext.h>
  28 #include <sys/utsname.h>
  29 #include <sys/ptrace.h>
  30 #include <asm/ptrace.h>
  31
  32 /* Read VQ for the given tid using ptrace.  If SVE is not supported then zero
  33    is returned (on a system that supports SVE, then VQ cannot be zero).  */
  34
  35 extern unsigned long aarch64_sve_get_vq (int tid);
  36
  37 /* Structures and defines taken from sigcontext.h.  */
  38
  39 #ifndef SVE_SIG_ZREGS_SIZE
  40
  41 #define SVE_VQ_BYTES            16      /* number of bytes per quadword */
  42
  43 #define SVE_VQ_MIN              1
  44 #define SVE_VQ_MAX              512
  45
  46 #define SVE_VL_MIN              (SVE_VQ_MIN * SVE_VQ_BYTES)
  47 #define SVE_VL_MAX              (SVE_VQ_MAX * SVE_VQ_BYTES)
  48
  49 #define SVE_NUM_ZREGS           32
  50 #define SVE_NUM_PREGS           16
  51
  52 #define sve_vl_valid(vl) \
  53         ((vl) % SVE_VQ_BYTES == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
  54
  55 #endif /* SVE_SIG_ZREGS_SIZE.  */
  56
  57
  58 /* Structures and defines taken from ptrace.h.  */
  59
  60 #ifndef SVE_PT_SVE_ZREG_SIZE
  61
  62 struct user_sve_header {
  63         __u32 size; /* total meaningful regset content in bytes */
  64         __u32 max_size; /* maxmium possible size for this thread */
  65         __u16 vl; /* current vector length */
  66         __u16 max_vl; /* maximum possible vector length */
  67         __u16 flags;
  68         __u16 __reserved;
  69 };
  70
  71 #endif /* SVE_PT_SVE_ZREG_SIZE.  */
  72
  73 #endif /* aarch64-sve-linux-ptrace.h */