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