projects / thirdparty / binutils-gdb.git / blame
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1 | /* Native-dependent code for GNU/Linux x86 (i386 and x86-64). |
| 2 | ||
| 42a4f53d | 3 | Copyright (C) 1999-2019 Free Software Foundation, Inc. |
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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 | #include "common-defs.h" | |
| 21 | #include "x86-linux.h" | |
| 369f6daa | 22 | #include "x86-linux-dregs.h" |
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23 | |
| 24 | /* Per-thread arch-specific data we want to keep. */ | |
| 25 | ||
| 26 | struct arch_lwp_info | |
| 27 | { | |
| 28 | /* Non-zero if our copy differs from what's recorded in the | |
| 29 | thread. */ | |
| 30 | int debug_registers_changed; | |
| 31 | }; | |
| 32 | ||
| 33 | /* See nat/x86-linux.h. */ | |
| 34 | ||
| 35 | void | |
| 36 | lwp_set_debug_registers_changed (struct lwp_info *lwp, int value) | |
| 37 | { | |
| 38 | if (lwp_arch_private_info (lwp) == NULL) | |
| 39 | lwp_set_arch_private_info (lwp, XCNEW (struct arch_lwp_info)); | |
| 40 | ||
| 41 | lwp_arch_private_info (lwp)->debug_registers_changed = value; | |
| 42 | } | |
| 43 | ||
| 44 | /* See nat/x86-linux.h. */ | |
| 45 | ||
| 46 | int | |
| 47 | lwp_debug_registers_changed (struct lwp_info *lwp) | |
| 48 | { | |
| 49 | struct arch_lwp_info *info = lwp_arch_private_info (lwp); | |
| 50 | ||
| 51 | /* NULL means either that this is the main thread still going | |
| 52 | through the shell, or that no watchpoint has been set yet. | |
| 53 | The debug registers are unchanged in either case. */ | |
| 54 | if (info == NULL) | |
| 55 | return 0; | |
| 56 | ||
| 57 | return info->debug_registers_changed; | |
| 58 | } | |
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59 | |
| 60 | /* See nat/x86-linux.h. */ | |
| 61 | ||
| 62 | void | |
| 63 | x86_linux_new_thread (struct lwp_info *lwp) | |
| 64 | { | |
| 65 | lwp_set_debug_registers_changed (lwp, 1); | |
| 66 | } | |
| 67 | ||
| 68 | /* See nat/x86-linux.h. */ | |
| 69 | ||
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70 | void |
| 71 | x86_linux_delete_thread (struct arch_lwp_info *arch_lwp) | |
| 72 | { | |
| 73 | xfree (arch_lwp); | |
| 74 | } | |
| 75 | ||
| 76 | /* See nat/x86-linux.h. */ | |
| 77 | ||
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78 | void |
| 79 | x86_linux_prepare_to_resume (struct lwp_info *lwp) | |
| 80 | { | |
| 81 | x86_linux_update_debug_registers (lwp); | |
| 82 | } |