GDB (xrefs)
/tmp/gdb-7.10/gdb/i386-linux-tdep.h
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1 /* Target-dependent code for GNU/Linux x86.
2 
3  Copyright (C) 2002-2015 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 I386_LINUX_TDEP_H
21 #define I386_LINUX_TDEP_H
22 
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. */
28 
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)
33 
34 /* Total number of registers for GNU/Linux. */
35 #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1)
36 
37 /* Get XSAVE extended state xcr0 from core dump. */
38 extern uint64_t i386_linux_core_read_xcr0 (bfd *abfd);
39 
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;
46 
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  };
61 
62  Same memory layout will be used for the coredump NT_X86_XSTATE
63  representing the XSAVE extended state registers.
64 
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
72 
74 
75 #endif /* i386-linux-tdep.h */
struct target_desc * tdesc_i386_mmx_linux
Definition: i386-mmx-linux.c:8
uint64_t i386_linux_core_read_xcr0(bfd *abfd)
struct target_desc * tdesc_i386_avx512_linux
int i386_linux_gregset_reg_offset[]
struct target_desc * tdesc_i386_mpx_linux
Definition: i386-mpx-linux.c:8
struct target_desc * tdesc_i386_avx_linux
Definition: i386-avx-linux.c:8
struct target_desc * tdesc_i386_linux
Definition: i386-linux.c:8