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52b98211 | 1 | /* Native macro definitions for GDB on an Intel i[3456]86. |
9b254dd1 | 2 | Copyright 2001, 2004, 2007, 2008 Free Software Foundation, Inc. |
52b98211 EZ |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
52b98211 EZ |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
52b98211 EZ |
18 | |
19 | #ifndef NM_I386_H | |
20 | #define NM_I386_H 1 | |
21 | ||
52b98211 EZ |
22 | /* Hardware-assisted breakpoints and watchpoints. */ |
23 | ||
24 | /* Targets should define this to use the generic x86 watchpoint support. */ | |
25 | #ifdef I386_USE_GENERIC_WATCHPOINTS | |
26 | ||
52b98211 EZ |
27 | /* Clear the reference counts and forget everything we knew about DRi. */ |
28 | extern void i386_cleanup_dregs (void); | |
29 | ||
30 | /* Insert a watchpoint to watch a memory region which starts at | |
31 | address ADDR and whose length is LEN bytes. Watch memory accesses | |
32 | of the type TYPE. Return 0 on success, -1 on failure. */ | |
207e433e | 33 | extern int i386_insert_watchpoint (CORE_ADDR addr, int len, int type); |
52b98211 EZ |
34 | |
35 | /* Remove a watchpoint that watched the memory region which starts at | |
36 | address ADDR, whose length is LEN bytes, and for accesses of the | |
37 | type TYPE. Return 0 on success, -1 on failure. */ | |
207e433e | 38 | extern int i386_remove_watchpoint (CORE_ADDR addr, int len, int type); |
52b98211 EZ |
39 | |
40 | /* Return non-zero if we can watch a memory region that starts at | |
41 | address ADDR and whose length is LEN bytes. */ | |
207e433e | 42 | extern int i386_region_ok_for_watchpoint (CORE_ADDR addr, int len); |
52b98211 EZ |
43 | |
44 | /* Return non-zero if the inferior has some break/watchpoint that | |
45 | triggered. */ | |
207e433e | 46 | extern int i386_stopped_by_hwbp (void); |
52b98211 | 47 | |
4aa7a7f5 JJ |
48 | /* If the inferior has some break/watchpoint that triggered, set |
49 | the address associated with that break/watchpoint and return | |
50 | true. Otherwise, return false. */ | |
51 | extern int i386_stopped_data_address (CORE_ADDR *); | |
52b98211 | 52 | |
8181d85f DJ |
53 | /* Insert a hardware-assisted breakpoint at BP_TGT->placed_address. |
54 | Return 0 on success, EBUSY on failure. */ | |
55 | struct bp_target_info; | |
56 | extern int i386_insert_hw_breakpoint (struct bp_target_info *bp_tgt); | |
52b98211 | 57 | |
8181d85f DJ |
58 | /* Remove a hardware-assisted breakpoint at BP_TGT->placed_address. |
59 | Return 0 on success, -1 on failure. */ | |
60 | extern int i386_remove_hw_breakpoint (struct bp_target_info *bp_tgt); | |
52b98211 EZ |
61 | |
62 | /* Returns the number of hardware watchpoints of type TYPE that we can | |
63 | set. Value is positive if we can set CNT watchpoints, zero if | |
64 | setting watchpoints of type TYPE is not supported, and negative if | |
65 | CNT is more than the maximum number of watchpoints of type TYPE | |
66 | that we can support. TYPE is one of bp_hardware_watchpoint, | |
67 | bp_read_watchpoint, bp_write_watchpoint, or bp_hardware_breakpoint. | |
68 | CNT is the number of such watchpoints used so far (including this | |
69 | one). OTHERTYPE is non-zero if other types of watchpoints are | |
70 | currently enabled. | |
71 | ||
72 | We always return 1 here because we don't have enough information | |
207e433e MK |
73 | about possible overlap of addresses that they want to watch. As an |
74 | extreme example, consider the case where all the watchpoints watch | |
75 | the same address and the same region length: then we can handle a | |
76 | virtually unlimited number of watchpoints, due to debug register | |
77 | sharing implemented via reference counts in i386-nat.c. */ | |
52b98211 EZ |
78 | |
79 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) 1 | |
80 | ||
207e433e MK |
81 | /* Returns non-zero if we can use hardware watchpoints to watch a |
82 | region whose address is ADDR and whose length is LEN. */ | |
52b98211 | 83 | |
207e433e MK |
84 | #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \ |
85 | i386_region_ok_for_watchpoint (addr, len) | |
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86 | |
87 | /* After a watchpoint trap, the PC points to the instruction after the | |
88 | one that caused the trap. Therefore we don't need to step over it. | |
89 | But we do need to reset the status register to avoid another trap. */ | |
90 | ||
7df1a324 | 91 | #define HAVE_CONTINUABLE_WATCHPOINT 1 |
52b98211 | 92 | |
4aa7a7f5 | 93 | extern int i386_stopped_by_watchpoint (void); |
52b98211 | 94 | |
4aa7a7f5 JJ |
95 | #define STOPPED_BY_WATCHPOINT(W) (i386_stopped_by_watchpoint () != 0) |
96 | ||
97 | #define target_stopped_data_address(target, x) i386_stopped_data_address(x) | |
52b98211 EZ |
98 | |
99 | /* Use these macros for watchpoint insertion/removal. */ | |
100 | ||
207e433e | 101 | #define target_insert_watchpoint(addr, len, type) \ |
52b98211 EZ |
102 | i386_insert_watchpoint (addr, len, type) |
103 | ||
207e433e | 104 | #define target_remove_watchpoint(addr, len, type) \ |
52b98211 EZ |
105 | i386_remove_watchpoint (addr, len, type) |
106 | ||
8181d85f DJ |
107 | #define target_insert_hw_breakpoint(bp_tgt) \ |
108 | i386_insert_hw_breakpoint (bp_tgt) | |
52b98211 | 109 | |
8181d85f DJ |
110 | #define target_remove_hw_breakpoint(bp_tgt) \ |
111 | i386_remove_hw_breakpoint (bp_tgt) | |
52b98211 | 112 | |
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113 | #endif /* I386_USE_GENERIC_WATCHPOINTS */ |
114 | ||
115 | #endif /* NM_I386_H */ |