Add h/w watchpoint support to x86-linux, win32-i386.
* Makefile.in (SFILES): Add i386-low.c
(i386_low_h): Define.
(i386-low.o): Add dependencies.
(linux-x86-low.o): Add i386-low.h dependency.
(win32-i386-low.o): Ditto.
* i386-low.c: New file.
* i386-low.h: New file.
* configure.srv (i[34567]86-*-cygwin*): Add i386-low.o to srv_tgtobj.
(i[34567]86-*-linux*, i[34567]86-*-mingw*, x86_64-*-linux*): Ditto.
* linux-low.c (linux_add_process): Initialize arch_private.
(linux_remove_process): Free arch_private.
(add_lwp): Initialize arch_private.
(delete_lwp): Free arch_private.
(linux_resume_one_lwp): Call the_low_target.prepare_to_resume if
provided.
* linux-low.h (process_info_private): New member arch_private.
(lwp_info): New member arch_private.
(linux_target_ops): New members new_process, new_thread,
prepare_to_resume.
(ptid_of): New macro.
* linux-x86-low.c: Include stddef.h, i386-low.h.
(arch_process_info): New struct.
(arch_lwp_info): New struct.
(x86_linux_dr_get, x86_linux_dr_set): New functions.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(x86_insert_point, x86_remove_point): New functions.
(x86_stopped_by_watchpoint): New function.
(x86_stopped_data_address): New function.
(x86_linux_new_process, x86_linux_new_thread): New functions.
(x86_linux_prepare_to_resume): New function.
(the_low_target): Add entries for insert_point, remove_point,
stopped_by_watchpoint, stopped_data_address, new_process, new_thread,
prepare_to_resume.
* server.c (debug_hw_points): New global.
(monitor_show_help): Document set debug-hw-points.
(handle_query): Process "set debug-hw-points".
* server.h (debug_hw_points): Declare.
(paddress): Declare.
* utils.c (NUMCELLS, CELLSIZE): New macros.
(get_sell, xsnprintf, paddress): New functions.
* win32-arm-low.c (the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-i386-low.c: Include i386-low.h.
(debug_reg_state): Replaces dr.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(i386_insert_point, i386_remove_point): New functions.
(i386_stopped_by_watchpoint): New function.
(i386_stopped_data_address): New function.
(i386_initial_stuff): Update.
(get_thread_context,set_thread_context,i386_thread_added): Update.
(the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-low.c (win32_insert_watchpoint): New function.
(win32_remove_watchpoint): New function.
(win32_stopped_by_watchpoint): New function.
(win32_stopped_data_address): New function.
(win32_target_ops): Add entries for insert_watchpoint,
remove_watchpoint, stopped_by_watchpoint, stopped_data_address.
* win32-low.h (win32_target_ops): New members insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
2009-07-01 05:31:32 +08:00
|
|
|
|
/* Misc. low level support for i386.
|
|
|
|
|
|
2011-01-01 23:34:07 +08:00
|
|
|
|
Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
|
Add h/w watchpoint support to x86-linux, win32-i386.
* Makefile.in (SFILES): Add i386-low.c
(i386_low_h): Define.
(i386-low.o): Add dependencies.
(linux-x86-low.o): Add i386-low.h dependency.
(win32-i386-low.o): Ditto.
* i386-low.c: New file.
* i386-low.h: New file.
* configure.srv (i[34567]86-*-cygwin*): Add i386-low.o to srv_tgtobj.
(i[34567]86-*-linux*, i[34567]86-*-mingw*, x86_64-*-linux*): Ditto.
* linux-low.c (linux_add_process): Initialize arch_private.
(linux_remove_process): Free arch_private.
(add_lwp): Initialize arch_private.
(delete_lwp): Free arch_private.
(linux_resume_one_lwp): Call the_low_target.prepare_to_resume if
provided.
* linux-low.h (process_info_private): New member arch_private.
(lwp_info): New member arch_private.
(linux_target_ops): New members new_process, new_thread,
prepare_to_resume.
(ptid_of): New macro.
* linux-x86-low.c: Include stddef.h, i386-low.h.
(arch_process_info): New struct.
(arch_lwp_info): New struct.
(x86_linux_dr_get, x86_linux_dr_set): New functions.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(x86_insert_point, x86_remove_point): New functions.
(x86_stopped_by_watchpoint): New function.
(x86_stopped_data_address): New function.
(x86_linux_new_process, x86_linux_new_thread): New functions.
(x86_linux_prepare_to_resume): New function.
(the_low_target): Add entries for insert_point, remove_point,
stopped_by_watchpoint, stopped_data_address, new_process, new_thread,
prepare_to_resume.
* server.c (debug_hw_points): New global.
(monitor_show_help): Document set debug-hw-points.
(handle_query): Process "set debug-hw-points".
* server.h (debug_hw_points): Declare.
(paddress): Declare.
* utils.c (NUMCELLS, CELLSIZE): New macros.
(get_sell, xsnprintf, paddress): New functions.
* win32-arm-low.c (the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-i386-low.c: Include i386-low.h.
(debug_reg_state): Replaces dr.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(i386_insert_point, i386_remove_point): New functions.
(i386_stopped_by_watchpoint): New function.
(i386_stopped_data_address): New function.
(i386_initial_stuff): Update.
(get_thread_context,set_thread_context,i386_thread_added): Update.
(the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-low.c (win32_insert_watchpoint): New function.
(win32_remove_watchpoint): New function.
(win32_stopped_by_watchpoint): New function.
(win32_stopped_data_address): New function.
(win32_target_ops): Add entries for insert_watchpoint,
remove_watchpoint, stopped_by_watchpoint, stopped_data_address.
* win32-low.h (win32_target_ops): New members insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
2009-07-01 05:31:32 +08:00
|
|
|
|
|
|
|
|
|
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 3 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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
|
|
|
|
/* Support for hardware watchpoints and breakpoints using the i386
|
|
|
|
|
debug registers.
|
|
|
|
|
|
|
|
|
|
This provides several functions for inserting and removing
|
|
|
|
|
hardware-assisted breakpoints and watchpoints, testing if one or
|
|
|
|
|
more of the watchpoints triggered and at what address, checking
|
|
|
|
|
whether a given region can be watched, etc.
|
|
|
|
|
|
|
|
|
|
The functions below implement debug registers sharing by reference
|
|
|
|
|
counts, and allow to watch regions up to 16 bytes long
|
|
|
|
|
(32 bytes on 64 bit hosts). */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Debug registers' indices. */
|
|
|
|
|
#define DR_FIRSTADDR 0
|
|
|
|
|
#define DR_LASTADDR 3
|
|
|
|
|
#define DR_NADDR 4 /* The number of debug address registers. */
|
|
|
|
|
#define DR_STATUS 6
|
|
|
|
|
#define DR_CONTROL 7
|
|
|
|
|
|
|
|
|
|
/* Global state needed to track h/w watchpoints. */
|
|
|
|
|
|
|
|
|
|
struct i386_debug_reg_state
|
|
|
|
|
{
|
|
|
|
|
/* Mirror the inferior's DRi registers. We keep the status and
|
2010-08-25 22:40:21 +08:00
|
|
|
|
control registers separated because they don't hold addresses.
|
|
|
|
|
Note that since we can change these mirrors while threads are
|
|
|
|
|
running, we never trust them to explain a cause of a trap.
|
|
|
|
|
For that, we need to peek directly in the inferior registers. */
|
Add h/w watchpoint support to x86-linux, win32-i386.
* Makefile.in (SFILES): Add i386-low.c
(i386_low_h): Define.
(i386-low.o): Add dependencies.
(linux-x86-low.o): Add i386-low.h dependency.
(win32-i386-low.o): Ditto.
* i386-low.c: New file.
* i386-low.h: New file.
* configure.srv (i[34567]86-*-cygwin*): Add i386-low.o to srv_tgtobj.
(i[34567]86-*-linux*, i[34567]86-*-mingw*, x86_64-*-linux*): Ditto.
* linux-low.c (linux_add_process): Initialize arch_private.
(linux_remove_process): Free arch_private.
(add_lwp): Initialize arch_private.
(delete_lwp): Free arch_private.
(linux_resume_one_lwp): Call the_low_target.prepare_to_resume if
provided.
* linux-low.h (process_info_private): New member arch_private.
(lwp_info): New member arch_private.
(linux_target_ops): New members new_process, new_thread,
prepare_to_resume.
(ptid_of): New macro.
* linux-x86-low.c: Include stddef.h, i386-low.h.
(arch_process_info): New struct.
(arch_lwp_info): New struct.
(x86_linux_dr_get, x86_linux_dr_set): New functions.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(x86_insert_point, x86_remove_point): New functions.
(x86_stopped_by_watchpoint): New function.
(x86_stopped_data_address): New function.
(x86_linux_new_process, x86_linux_new_thread): New functions.
(x86_linux_prepare_to_resume): New function.
(the_low_target): Add entries for insert_point, remove_point,
stopped_by_watchpoint, stopped_data_address, new_process, new_thread,
prepare_to_resume.
* server.c (debug_hw_points): New global.
(monitor_show_help): Document set debug-hw-points.
(handle_query): Process "set debug-hw-points".
* server.h (debug_hw_points): Declare.
(paddress): Declare.
* utils.c (NUMCELLS, CELLSIZE): New macros.
(get_sell, xsnprintf, paddress): New functions.
* win32-arm-low.c (the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-i386-low.c: Include i386-low.h.
(debug_reg_state): Replaces dr.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(i386_insert_point, i386_remove_point): New functions.
(i386_stopped_by_watchpoint): New function.
(i386_stopped_data_address): New function.
(i386_initial_stuff): Update.
(get_thread_context,set_thread_context,i386_thread_added): Update.
(the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-low.c (win32_insert_watchpoint): New function.
(win32_remove_watchpoint): New function.
(win32_stopped_by_watchpoint): New function.
(win32_stopped_data_address): New function.
(win32_target_ops): Add entries for insert_watchpoint,
remove_watchpoint, stopped_by_watchpoint, stopped_data_address.
* win32-low.h (win32_target_ops): New members insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
2009-07-01 05:31:32 +08:00
|
|
|
|
CORE_ADDR dr_mirror[DR_NADDR];
|
|
|
|
|
unsigned dr_status_mirror, dr_control_mirror;
|
|
|
|
|
|
|
|
|
|
/* Reference counts for each debug register. */
|
|
|
|
|
int dr_ref_count[DR_NADDR];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Initialize STATE. */
|
|
|
|
|
extern void i386_low_init_dregs (struct i386_debug_reg_state *state);
|
|
|
|
|
|
|
|
|
|
/* 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_FROM_PACKET. Return 0 on success, -1 on failure. */
|
|
|
|
|
extern int i386_low_insert_watchpoint (struct i386_debug_reg_state *state,
|
|
|
|
|
char type_from_packet, CORE_ADDR addr,
|
|
|
|
|
int len);
|
|
|
|
|
|
|
|
|
|
/* 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_FROM_PACKET. Return 0 on success, -1 on failure. */
|
|
|
|
|
extern int i386_low_remove_watchpoint (struct i386_debug_reg_state *state,
|
|
|
|
|
char type_from_packet, CORE_ADDR addr,
|
|
|
|
|
int len);
|
|
|
|
|
|
|
|
|
|
/* Return non-zero if we can watch a memory region that starts at
|
|
|
|
|
address ADDR and whose length is LEN bytes. */
|
|
|
|
|
extern int i386_low_region_ok_for_watchpoint (struct i386_debug_reg_state *state,
|
|
|
|
|
CORE_ADDR addr, int len);
|
|
|
|
|
|
|
|
|
|
/* If the inferior has some break/watchpoint that triggered, set the
|
|
|
|
|
address associated with that break/watchpoint and return true.
|
|
|
|
|
Otherwise, return false. */
|
|
|
|
|
extern int i386_low_stopped_data_address (struct i386_debug_reg_state *state,
|
|
|
|
|
CORE_ADDR *addr_p);
|
|
|
|
|
|
|
|
|
|
/* Return true if the inferior has some watchpoint that triggered.
|
|
|
|
|
Otherwise return false. */
|
|
|
|
|
extern int i386_low_stopped_by_watchpoint (struct i386_debug_reg_state *state);
|
|
|
|
|
|
|
|
|
|
/* Each target needs to provide several low-level functions
|
|
|
|
|
that will be called to insert watchpoints and hardware breakpoints
|
|
|
|
|
into the inferior, remove them, and check their status. These
|
|
|
|
|
functions are:
|
|
|
|
|
|
|
|
|
|
i386_dr_low_set_control -- set the debug control (DR7)
|
|
|
|
|
register to a given value
|
|
|
|
|
|
|
|
|
|
i386_dr_low_set_addr -- put an address into one debug register
|
|
|
|
|
|
|
|
|
|
i386_dr_low_get_status -- return the value of the debug
|
|
|
|
|
status (DR6) register.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* Update the inferior's debug register REGNUM from STATE. */
|
|
|
|
|
extern void i386_dr_low_set_addr (const struct i386_debug_reg_state *state,
|
|
|
|
|
int regnum);
|
|
|
|
|
|
2010-08-25 22:40:21 +08:00
|
|
|
|
/* Return the inferior's debug register REGNUM. */
|
|
|
|
|
extern CORE_ADDR i386_dr_low_get_addr (int regnum);
|
|
|
|
|
|
Add h/w watchpoint support to x86-linux, win32-i386.
* Makefile.in (SFILES): Add i386-low.c
(i386_low_h): Define.
(i386-low.o): Add dependencies.
(linux-x86-low.o): Add i386-low.h dependency.
(win32-i386-low.o): Ditto.
* i386-low.c: New file.
* i386-low.h: New file.
* configure.srv (i[34567]86-*-cygwin*): Add i386-low.o to srv_tgtobj.
(i[34567]86-*-linux*, i[34567]86-*-mingw*, x86_64-*-linux*): Ditto.
* linux-low.c (linux_add_process): Initialize arch_private.
(linux_remove_process): Free arch_private.
(add_lwp): Initialize arch_private.
(delete_lwp): Free arch_private.
(linux_resume_one_lwp): Call the_low_target.prepare_to_resume if
provided.
* linux-low.h (process_info_private): New member arch_private.
(lwp_info): New member arch_private.
(linux_target_ops): New members new_process, new_thread,
prepare_to_resume.
(ptid_of): New macro.
* linux-x86-low.c: Include stddef.h, i386-low.h.
(arch_process_info): New struct.
(arch_lwp_info): New struct.
(x86_linux_dr_get, x86_linux_dr_set): New functions.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(x86_insert_point, x86_remove_point): New functions.
(x86_stopped_by_watchpoint): New function.
(x86_stopped_data_address): New function.
(x86_linux_new_process, x86_linux_new_thread): New functions.
(x86_linux_prepare_to_resume): New function.
(the_low_target): Add entries for insert_point, remove_point,
stopped_by_watchpoint, stopped_data_address, new_process, new_thread,
prepare_to_resume.
* server.c (debug_hw_points): New global.
(monitor_show_help): Document set debug-hw-points.
(handle_query): Process "set debug-hw-points".
* server.h (debug_hw_points): Declare.
(paddress): Declare.
* utils.c (NUMCELLS, CELLSIZE): New macros.
(get_sell, xsnprintf, paddress): New functions.
* win32-arm-low.c (the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-i386-low.c: Include i386-low.h.
(debug_reg_state): Replaces dr.
(i386_dr_low_set_addr, i386_dr_low_set_control): New functions.
(i386_dr_low_get_status): New function.
(i386_insert_point, i386_remove_point): New functions.
(i386_stopped_by_watchpoint): New function.
(i386_stopped_data_address): New function.
(i386_initial_stuff): Update.
(get_thread_context,set_thread_context,i386_thread_added): Update.
(the_low_target): Add entries for insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
* win32-low.c (win32_insert_watchpoint): New function.
(win32_remove_watchpoint): New function.
(win32_stopped_by_watchpoint): New function.
(win32_stopped_data_address): New function.
(win32_target_ops): Add entries for insert_watchpoint,
remove_watchpoint, stopped_by_watchpoint, stopped_data_address.
* win32-low.h (win32_target_ops): New members insert_point,
remove_point, stopped_by_watchpoint, stopped_data_address.
2009-07-01 05:31:32 +08:00
|
|
|
|
/* Update the inferior's DR7 debug control register from STATE. */
|
|
|
|
|
extern void i386_dr_low_set_control (const struct i386_debug_reg_state *state);
|
|
|
|
|
|
2010-08-25 22:40:21 +08:00
|
|
|
|
/* Return the value of the inferior's DR7 debug control register. */
|
|
|
|
|
extern unsigned i386_dr_low_get_control (void);
|
|
|
|
|
|
|
|
|
|
/* Return the value of the inferior's DR6 debug status register. */
|
|
|
|
|
extern unsigned i386_dr_low_get_status (void);
|