| /* Native macro definitions for GDB on an Intel i[3456]86. |
| Copyright 2001 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #ifndef NM_I386_H |
| #define NM_I386_H 1 |
| |
| /* Hardware-assisted breakpoints and watchpoints. */ |
| |
| /* Targets should define this to use the generic x86 watchpoint support. */ |
| #ifdef I386_USE_GENERIC_WATCHPOINTS |
| |
| #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS |
| #define TARGET_HAS_HARDWARE_WATCHPOINTS |
| #endif |
| |
| /* Clear the reference counts and forget everything we knew about DRi. */ |
| extern void i386_cleanup_dregs (void); |
| |
| /* Insert a watchpoint to watch a memory region which starts at |
| address ADDR and whose length is LEN bytes. Watch memory accesses |
| of the type TYPE. Return 0 on success, -1 on failure. */ |
| extern int i386_insert_watchpoint (CORE_ADDR addr, int len, int type); |
| |
| /* Remove a watchpoint that watched the memory region which starts at |
| address ADDR, whose length is LEN bytes, and for accesses of the |
| type TYPE. Return 0 on success, -1 on failure. */ |
| extern int i386_remove_watchpoint (CORE_ADDR addr, int len, int type); |
| |
| /* Return non-zero if we can watch a memory region that starts at |
| address ADDR and whose length is LEN bytes. */ |
| extern int i386_region_ok_for_watchpoint (CORE_ADDR addr, int len); |
| |
| /* Return non-zero if the inferior has some break/watchpoint that |
| triggered. */ |
| extern int i386_stopped_by_hwbp (void); |
| |
| /* If the inferior has some break/watchpoint that triggered, return |
| the address associated with that break/watchpoint. Otherwise, |
| return zero. */ |
| extern CORE_ADDR i386_stopped_data_address (void); |
| |
| /* Insert a hardware-assisted breakpoint at address ADDR. SHADOW is |
| unused. Return 0 on success, EBUSY on failure. */ |
| extern int i386_insert_hw_breakpoint (CORE_ADDR addr, void *shadow); |
| |
| /* Remove a hardware-assisted breakpoint at address ADDR. SHADOW is |
| unused. Return 0 on success, -1 on failure. */ |
| extern int i386_remove_hw_breakpoint (CORE_ADDR addr, void *shadow); |
| |
| /* Returns the number of hardware watchpoints of type TYPE that we can |
| set. Value is positive if we can set CNT watchpoints, zero if |
| setting watchpoints of type TYPE is not supported, and negative if |
| CNT is more than the maximum number of watchpoints of type TYPE |
| that we can support. TYPE is one of bp_hardware_watchpoint, |
| bp_read_watchpoint, bp_write_watchpoint, or bp_hardware_breakpoint. |
| CNT is the number of such watchpoints used so far (including this |
| one). OTHERTYPE is non-zero if other types of watchpoints are |
| currently enabled. |
| |
| We always return 1 here because we don't have enough information |
| about possible overlap of addresses that they want to watch. As an |
| extreme example, consider the case where all the watchpoints watch |
| the same address and the same region length: then we can handle a |
| virtually unlimited number of watchpoints, due to debug register |
| sharing implemented via reference counts in i386-nat.c. */ |
| |
| #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) 1 |
| |
| /* Returns non-zero if we can use hardware watchpoints to watch a |
| region whose address is ADDR and whose length is LEN. */ |
| |
| #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \ |
| i386_region_ok_for_watchpoint (addr, len) |
| |
| /* After a watchpoint trap, the PC points to the instruction after the |
| one that caused the trap. Therefore we don't need to step over it. |
| But we do need to reset the status register to avoid another trap. */ |
| |
| #define HAVE_CONTINUABLE_WATCHPOINT |
| |
| #define STOPPED_BY_WATCHPOINT(W) (i386_stopped_data_address () != 0) |
| |
| #define target_stopped_data_address() i386_stopped_data_address () |
| |
| /* Use these macros for watchpoint insertion/removal. */ |
| |
| #define target_insert_watchpoint(addr, len, type) \ |
| i386_insert_watchpoint (addr, len, type) |
| |
| #define target_remove_watchpoint(addr, len, type) \ |
| i386_remove_watchpoint (addr, len, type) |
| |
| #define target_insert_hw_breakpoint(addr, shadow) \ |
| i386_insert_hw_breakpoint (addr, shadow) |
| |
| #define target_remove_hw_breakpoint(addr, shadow) \ |
| i386_remove_hw_breakpoint (addr, shadow) |
| |
| #define DECR_PC_AFTER_HW_BREAK 0 |
| |
| #endif /* I386_USE_GENERIC_WATCHPOINTS */ |
| |
| #endif /* NM_I386_H */ |