gdb/i386-linux-tdep.h - gdb

Macros defined

Source code

  1. /* Target-dependent code for GNU/Linux x86.

  3.    Copyright (C) 2002-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  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.

  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.

  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/>.  */

  20. #ifndef I386_LINUX_TDEP_H
  21. ‌#define I386_LINUX_TDEP_H

  23. /* The Linux kernel pretends there is an additional "orig_eax"
  24.    register.  Since GDB needs access to that register to be able to
  25.    properly restart system calls when necessary (see
  26.    i386-linux-tdep.c) we need our own versions of a number of
  27.    functions that deal with GDB's register cache.  */

  29. /* Register number for the "orig_eax" pseudo-register.  If this
  30.    pseudo-register contains a value >= 0 it is interpreted as the
  31.    system call number that the kernel is supposed to restart.  */
  32. ‌#define I386_LINUX_ORIG_EAX_REGNUM (I386_ZMM7H_REGNUM + 1)

  34. /* Total number of registers for GNU/Linux.  */
  35. ‌#define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1)

  37. /* Get XSAVE extended state xcr0 from core dump.  */
  38. extern uint64_t i386_linux_core_read_xcr0 (bfd *abfd);

  40. /* Linux target description.  */
  41. extern struct target_desc *tdesc_i386_linux;
  42. extern struct target_desc *tdesc_i386_mmx_linux;
  43. extern struct target_desc *tdesc_i386_avx_linux;
  44. extern struct target_desc *tdesc_i386_mpx_linux;
  45. extern struct target_desc *tdesc_i386_avx512_linux;

  47. /* Format of XSAVE extended state is:
  48.          struct
  49.         {
  50.           fxsave_bytes[0..463]
  51.           sw_usable_bytes[464..511]
  52.           xstate_hdr_bytes[512..575]
  53.           avx_bytes[576..831]
  54.           mpx_bytes [960..1032]
  55.           avx512_k_regs[1088..1152]
  56.           avx512_zmmh_regs0-7[1153..1407]
  57.           avx512_zmmh_regs8-15[1408..1663]
  58.           avx512_zmm_regs16-31[1664..2687]
  59.           future_state etc
  60.         };

  62.   Same memory layout will be used for the coredump NT_X86_XSTATE
  63.   representing the XSAVE extended state registers.

  65.   The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled
  66.   extended state mask, which is the same as the extended control register
  67.   0 (the XFEATURE_ENABLED_MASK register), XCR0.  We can use this mask
  68.   together with the mask saved in the xstate_hdr_bytes to determine what
  69.   states the processor/OS supports and what state, used or initialized,
  70.   the process/thread is in.  */
  71. ‌#define I386_LINUX_XSAVE_XCR0_OFFSET 464

  73. extern int i386_linux_gregset_reg_offset[];

  75. #endif /* i386-linux-tdep.h */