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0542c381 AC |
1 | /* Target-dependent code for GNU/Linux x86. |
2 | ||
1d506c26 | 3 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
8201327c MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
8201327c MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8201327c MK |
19 | |
20 | #ifndef I386_LINUX_TDEP_H | |
21 | #define I386_LINUX_TDEP_H | |
22 | ||
b42405a1 JB |
23 | #include "gdbsupport/x86-xstate.h" |
24 | ||
8201327c MK |
25 | /* The Linux kernel pretends there is an additional "orig_eax" |
26 | register. Since GDB needs access to that register to be able to | |
27 | properly restart system calls when necessary (see | |
28 | i386-linux-tdep.c) we need our own versions of a number of | |
29 | functions that deal with GDB's register cache. */ | |
30 | ||
31 | /* Register number for the "orig_eax" pseudo-register. If this | |
32 | pseudo-register contains a value >= 0 it is interpreted as the | |
33 | system call number that the kernel is supposed to restart. */ | |
51547df6 | 34 | #define I386_LINUX_ORIG_EAX_REGNUM (I386_PKRU_REGNUM + 1) |
8201327c | 35 | |
60fac5b8 MK |
36 | /* Total number of registers for GNU/Linux. */ |
37 | #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1) | |
38 | ||
b42405a1 JB |
39 | /* Read the XSAVE extended state xcr0 value from the ABFD core file. |
40 | If it appears to be valid, return it and fill LAYOUT with values | |
41 | inferred from that value. | |
42 | ||
43 | Otherwise, return 0 to indicate no state was found and leave LAYOUT | |
44 | untouched. */ | |
45 | extern uint64_t i386_linux_core_read_xsave_info (bfd *abfd, | |
46 | x86_xsave_layout &layout); | |
47 | ||
48 | /* Implement the core_read_x86_xsave_layout gdbarch method. */ | |
49 | extern bool i386_linux_core_read_x86_xsave_layout (struct gdbarch *gdbarch, | |
50 | x86_xsave_layout &layout); | |
c131fcee | 51 | |
012b3a21 WT |
52 | /* Handle and display information related to the MPX bound violation |
53 | to the user. */ | |
77bdfeb2 JB |
54 | extern void i386_linux_report_signal_info (struct gdbarch *gdbarch, |
55 | struct ui_out *uiout, | |
56 | enum gdb_signal siggnal); | |
012b3a21 | 57 | |
35b4818d YQ |
58 | /* Return the target description according to XCR0. */ |
59 | extern const struct target_desc *i386_linux_read_description (uint64_t xcr0); | |
c131fcee L |
60 | |
61 | /* Format of XSAVE extended state is: | |
24b21115 | 62 | struct |
c131fcee L |
63 | { |
64 | fxsave_bytes[0..463] | |
65 | sw_usable_bytes[464..511] | |
66 | xstate_hdr_bytes[512..575] | |
b42405a1 | 67 | extended state regions (AVX, MPX, AVX512, PKRU, etc.) |
c131fcee L |
68 | }; |
69 | ||
70 | Same memory layout will be used for the coredump NT_X86_XSTATE | |
71 | representing the XSAVE extended state registers. | |
72 | ||
73 | The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled | |
74 | extended state mask, which is the same as the extended control register | |
75 | 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask | |
76 | together with the mask saved in the xstate_hdr_bytes to determine what | |
77 | states the processor/OS supports and what state, used or initialized, | |
78 | the process/thread is in. */ | |
79 | #define I386_LINUX_XSAVE_XCR0_OFFSET 464 | |
90884b2b | 80 | |
be0d2954 L |
81 | extern int i386_linux_gregset_reg_offset[]; |
82 | ||
190b495d WT |
83 | /* Return x86 siginfo type. */ |
84 | extern struct type *x86_linux_get_siginfo_type (struct gdbarch *gdbarch); | |
85 | ||
8201327c | 86 | #endif /* i386-linux-tdep.h */ |