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Diffstat (limited to 'contrib/gdb/gdb/config/i386/nm-i386.h')
-rw-r--r-- | contrib/gdb/gdb/config/i386/nm-i386.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/config/i386/nm-i386.h b/contrib/gdb/gdb/config/i386/nm-i386.h new file mode 100644 index 0000000..500bf7b --- /dev/null +++ b/contrib/gdb/gdb/config/i386/nm-i386.h @@ -0,0 +1,120 @@ +/* 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 */ |