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

   1 /* Common target dependent for AArch64 systems.
   2
   3    Copyright (C) 2018-2021 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 NAT_AARCH64_SVE_LINUX_PTRACE_H
  21 #define NAT_AARCH64_SVE_LINUX_PTRACE_H
  22
  23 #include <signal.h>
  24 #include <sys/utsname.h>
  25
  26 /* The order in which <sys/ptrace.h> and <asm/ptrace.h> are included
  27    can be important.  <sys/ptrace.h> often declares various PTRACE_*
  28    enums.  <asm/ptrace.h> often defines preprocessor constants for
  29    these very same symbols.  When that's the case, build errors will
  30    result when <asm/ptrace.h> is included before <sys/ptrace.h>.  */
  31 #include <sys/ptrace.h>
  32 #include <asm/ptrace.h>
  33
  34 #ifndef SVE_SIG_ZREGS_SIZE
  35 #include "aarch64-sve-linux-sigcontext.h"
  36 #endif
  37
  38 /* Indicates whether a SVE ptrace header is followed by SVE registers or a
  39    fpsimd structure.  */
  40
  41 #define HAS_SVE_STATE(header) ((header).flags & SVE_PT_REGS_SVE)
  42
  43 /* Read VQ for the given tid using ptrace.  If SVE is not supported then zero
  44    is returned (on a system that supports SVE, then VQ cannot be zero).  */
  45
  46 uint64_t aarch64_sve_get_vq (int tid);
  47
  48 /* Set VQ in the kernel for the given tid, using either the value VQ or
  49    reading from the register VG in the register buffer.  */
  50
  51 bool aarch64_sve_set_vq (int tid, uint64_t vq);
  52 bool aarch64_sve_set_vq (int tid, struct reg_buffer_common *reg_buf);
  53
  54 /* Read the current SVE register set using ptrace, allocating space as
  55    required.  */
  56
  57 extern std::unique_ptr<gdb_byte[]> aarch64_sve_get_sveregs (int tid);
  58
  59 /* Put the registers from linux structure buf into register buffer.  Assumes the
  60    vector lengths in the register buffer match the size in the kernel.  */
  61
  62 extern void aarch64_sve_regs_copy_to_reg_buf (struct reg_buffer_common *reg_buf,
  63                                               const void *buf);
  64
  65 /* Put the registers from register buffer into linux structure buf.  Assumes the
  66    vector lengths in the register buffer match the size in the kernel.  */
  67
  68 extern void
  69 aarch64_sve_regs_copy_from_reg_buf (const struct reg_buffer_common *reg_buf,
  70                                     void *buf);
  71
  72 #endif /* NAT_AARCH64_SVE_LINUX_PTRACE_H */