projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| 9bb9e8ad PM |
1 | /* Native-dependent code for the i386. |
| 2 | ||
| 3 | Low level functions to implement Oeprating System specific | |
| 4 | code to manipulate I386 debug registers. | |
| 5 | ||
| 6 | Copyright (C) 2009 | |
| 7 | Free Software Foundation, Inc. | |
| 8 | ||
| 9 | This file is part of GDB. | |
| 10 | ||
| 11 | This program is free software; you can redistribute it and/or modify | |
| 12 | it under the terms of the GNU General Public License as published by | |
| 13 | the Free Software Foundation; either version 3 of the License, or | |
| 14 | (at your option) any later version. | |
| 15 | ||
| 16 | This program is distributed in the hope that it will be useful, | |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | GNU General Public License for more details. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License | |
| 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 23 | ||
| 24 | #include "defs.h" | |
| 25 | ||
| 26 | #ifndef I386_NAT_H | |
| 27 | #define I386_NAT_H 1 | |
| 28 | ||
| 29 | /* Hardware-assisted breakpoints and watchpoints. */ | |
| 30 | ||
| 31 | /* Add watchpoint methods to the provided target_ops. | |
| 32 | Targets using i386 family debug registers for watchpoints should call | |
| 33 | this. */ | |
| 34 | struct target_ops; | |
| 35 | extern void i386_use_watchpoints (struct target_ops *); | |
| 36 | ||
| 37 | /* Support for hardware watchpoints and breakpoints using the i386 | |
| 38 | debug registers. | |
| 39 | ||
| 40 | This provides several functions for inserting and removing | |
| 41 | hardware-assisted breakpoints and watchpoints, testing if one or | |
| 42 | more of the watchpoints triggered and at what address, checking | |
| 43 | whether a given region can be watched, etc. | |
| 44 | ||
| 45 | In addition, each target should provide several low-level functions | |
| 46 | regrouped into i386_dr_low_type struct below. These functions | |
| 47 | that will be called to insert watchpoints and hardware breakpoints | |
| 48 | into the inferior, remove them, and check their status. These | |
| 49 | functions are: | |
| 50 | ||
| 51 | set_control -- set the debug control (DR7) | |
| 52 | register to a given value | |
| 53 | ||
| 54 | set_addr -- put an address into one debug | |
| 55 | register | |
| 56 | ||
| 57 | reset_addr -- reset the address stored in | |
| 58 | one debug register | |
| 59 | ||
| 60 | get_status -- return the value of the debug | |
| 61 | status (DR6) register. | |
| 62 | ||
| 63 | Additionally, the native file should set the debug_register_length | |
| 64 | field to 4 or 8 depending on the number of bytes used for | |
| 65 | deubg registers. */ | |
| 66 | ||
| 67 | struct i386_dr_low_type | |
| 68 | { | |
| 69 | void (*set_control) (unsigned long); | |
| 70 | void (*set_addr) (int, CORE_ADDR); | |
| 71 | void (*reset_addr) (int); | |
| 72 | unsigned long (*get_status) (void); | |
| 73 | int debug_register_length; | |
| 74 | }; | |
| 75 | ||
| 76 | extern struct i386_dr_low_type i386_dr_low; | |
| 77 | ||
| 78 | /* Use this function to set i386_dr_low debug_register_length field | |
| 79 | rather than setting it directly to check that the length is only | |
| 80 | set once. It also enables the 'maint set/show show-debug-regs' | |
| 81 | command. */ | |
| 82 | ||
| 83 | extern void i386_set_debug_register_length (int len); | |
| 84 | ||
| 85 | /* Use this function to reset the i386-nat.c debug register state. */ | |
| 86 | ||
| 87 | extern void i386_cleanup_dregs (void); | |
| 88 | ||
| 89 | #endif /* I386_NAT_H */ |