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2011-12-14 Pedro Alves <pedro@codesourcery.com> PR threads/10729 * linux-nat.c (linux_nat_new_thread): Change parameter to an lwp pointer. (linux_nat_prepare_to_resume): New global. (lwp_free): New. (purge_lwp_list): Use it. (add_lwp): Call linux_nat_new_thread even on the first LWP. Adjust to interface change. (delete_lwp): Call lwp_free instead of xfree. (detach_callback, linux_nat_detach, resume_lwp, linux_nat_resume) (linux_handle_syscall_trap, linux_handle_extended_wait) (linux_nat_filter_event, resume_stopped_resumed_lwps): Call linux_nat_prepare_to_resume before resuming. (linux_stop_lwp): New. (linux_nat_set_new_thread): Adjust. (linux_nat_set_prepare_to_resume): New. * linux-nat.h (struct arch_lwp_info): Forward declare. (struct lwp_info) <arch_private>: New field. (linux_stop_lwp): Declare. (linux_nat_set_new_thread): Adjust. (linux_nat_set_prepare_to_resume): New. * i386-nat.c (DR_NADDR, DR_STATUS, DR_CONTROL) (struct i386_debug_reg_state): Move to i386-nat.h. (dr_mirror): Comment. (i386_debug_reg_state): New. (i386_update_inferior_debug_regs): Simplify. (i386_stopped_data_address): Use the debug register state from the inferior, not from the local cache. * i386-nat.h (struct i386_dr_low_type): Delete reset_addr and unset_status fields. New get_addr and get_control fields. (DR_FIRSTADDR, DR_LASTADDR, DR_CONTROL): Moved from i386-nat.c. (DR_NADDR, DR_STATUS): New. (struct i386_debug_reg_state): Moved from i386-nat.c. * amd64-linux-nat.c (struct arch_lwp_info): New. (amd64_linux_dr): Delete global. (amd64_linux_dr_get_addr): New. (amd64_linux_dr_get_control): New. (amd64_linux_dr_unset_status): Delete. (amd64_linux_dr_set_addr): Reimplement. (amd64_linux_dr_reset_addr): Delete. (update_debug_registers_callback): New. (amd64_linux_dr_set_control): Reimplement. (amd64_linux_dr_set_addr): Reimplement. (amd64_linux_prepare_to_resume): New. (amd64_linux_new_thread): Change parameter to an lwp pointer. Reimplement. (_initialize_amd64_linux_nat): No longer install i386_dr_low.reset_addr and i386_dr_low.unset_status. Install amd64_linux_dr_get_control as i386_dr_low.get_control. Install amd64_linux_dr_get_addr as i386_dr_low.get_addr. Install amd64_linux_prepare_to_resume. * i386-linux-nat.c (DR_FIRSTADDR, DR_LASTADDR, DR_STATUS) (DR_CONTROL): Delete. (struct arch_lwp_info): New. (i386_linux_dr): Delete global. (i386_linux_dr_set_control): Reimplement. (i386_linux_dr_get_addr): New. (i386_linux_dr_set_addr): Reimplement. (i386_linux_dr_get_control): New. (update_debug_registers_callback): New. (i386_linux_dr_unset_status): Delete. (i386_linux_dr_set_addr): Reimplement. (i386_linux_prepare_to_resume): New. (i386_linux_new_thread): Change parameter to an lwp pointer. Reimplement. (_initialize_i386_linux_nat): No longer install i386_dr_low.reset_addr and i386_dr_low.unset_status. Install i386_linux_dr_get_control as i386_dr_low.get_control. Install i386_linux_dr_get_addr as i386_dr_low.get_addr. Install i386_linux_prepare_to_resume. * arm-linux-nat.c (arm_linux_new_thread): Change parameter to an lwp pointer. Adjust. * ia64-linux-nat.c (ia64_linux_new_thread): Likewise. * mips-linux-nat.c (mips_linux_new_thread): Likewise. * ppc-linux-nat.c (ppc_linux_new_thread): Likewise. * s390-nat.c (s390_fix_watch_points): Likewise. * i386-darwin-nat.c (DR_FIRSTADDR, DR_LASTADDR, DR_STATUS) (DR_CONTROL): Delete. (i386_darwin_dr_reset_addr): Delete. (i386_darwin_dr_get_addr): New. (i386_darwin_dr_get_control): New. * go32-nat.c (go32_get_dr7, go32_get_dr): New. (init_go32_ops): No longer install i386_dr_low.reset_addr. Install go32_get_dr7 as i386_dr_low.get_control. Install go32_get_dr as i386_dr_low.get_addr. * i386bsd-nat.c (i386bsd_dr_get): New. (i386bsd_dr_reset_addr): Delete. (i386bsd_dr_get_addr): New. (i386bsd_dr_get_status): Use i386bsd_dr_get. (i386bsd_dr_get_control): New. * i386bsd-nat.h (i386bsd_dr_reset_addr): Delete. (i386bsd_dr_get_addr): New. (i386bsd_dr_get_control): New. * i386fbsd-nat.c (_initialize_i386fbsd_nat): No longer install i386_dr_low.reset_addr and i386_dr_low.unset_status. Install i386bsd_dr_get_control as i386_dr_low.get_control. Install i386bsd_dr_get_addr as i386_dr_low.get_addr. * windows-nat.c (init_windows_ops): No longer install i386_dr_low.reset_addr and i386_dr_low.unset_status. Install cygwin_get_dr7 as i386_dr_low.get_control. Install cygwin_get_dr as i386_dr_low.get_addr. (cygwin_get_dr): New. (cygwin_get_dr7): New. gdb/testsuite/ 2011-12-14 Pedro Alves <pedro@codesourcery.com> PR threads/10729 * gdb.mi/watch-nonstop.c: New file. * gdb.mi/mi-watch-nonstop.exp: New file.
121 lines
4.2 KiB
C
121 lines
4.2 KiB
C
/* Native-dependent code for the i386.
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Low level functions to implement Oeprating System specific
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code to manipulate I386 debug registers.
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Copyright (C) 2009, 2010, 2011 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#ifndef I386_NAT_H
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#define I386_NAT_H 1
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/* Hardware-assisted breakpoints and watchpoints. */
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/* Add watchpoint methods to the provided target_ops.
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Targets using i386 family debug registers for watchpoints should call
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this. */
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struct target_ops;
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extern void i386_use_watchpoints (struct target_ops *);
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/* Support for hardware watchpoints and breakpoints using the i386
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debug registers.
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This provides several functions for inserting and removing
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hardware-assisted breakpoints and watchpoints, testing if one or
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more of the watchpoints triggered and at what address, checking
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whether a given region can be watched, etc.
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In addition, each target should provide several low-level functions
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regrouped into i386_dr_low_type struct below. These functions
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that will be called to insert watchpoints and hardware breakpoints
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into the inferior, remove them, and check their status. These
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functions are:
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set_control -- set the debug control (DR7)
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register to a given value for all LWPs
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set_addr -- put an address into one debug
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register for all LWPs
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get_addr -- return the address in a given debug
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register of the current LWP
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get_status -- return the value of the debug
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status (DR6) register for current LWP
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get_control -- return the value of the debug
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control (DR7) register for current LWP
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Additionally, the native file should set the debug_register_length
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field to 4 or 8 depending on the number of bytes used for
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deubg registers. */
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struct i386_dr_low_type
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{
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void (*set_control) (unsigned long);
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void (*set_addr) (int, CORE_ADDR);
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CORE_ADDR (*get_addr) (int);
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unsigned long (*get_status) (void);
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unsigned long (*get_control) (void);
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int debug_register_length;
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};
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extern struct i386_dr_low_type i386_dr_low;
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/* Debug registers' indices. */
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#define DR_FIRSTADDR 0
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#define DR_LASTADDR 3
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#define DR_NADDR 4 /* The number of debug address registers. */
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#define DR_STATUS 6 /* Index of debug status register (DR6). */
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#define DR_CONTROL 7 /* Index of debug control register (DR7). */
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/* Global state needed to track h/w watchpoints. */
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struct i386_debug_reg_state
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{
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/* Mirror the inferior's DRi registers. We keep the status and
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control registers separated because they don't hold addresses.
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Note that since we can change these mirrors while threads are
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running, we never trust them to explain a cause of a trap.
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For that, we need to peek directly in the inferior registers. */
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CORE_ADDR dr_mirror[DR_NADDR];
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unsigned dr_status_mirror, dr_control_mirror;
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/* Reference counts for each debug register. */
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int dr_ref_count[DR_NADDR];
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};
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/* Use this function to set i386_dr_low debug_register_length field
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rather than setting it directly to check that the length is only
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set once. It also enables the 'maint set/show show-debug-regs'
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command. */
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extern void i386_set_debug_register_length (int len);
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/* Use this function to reset the i386-nat.c debug register state. */
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extern void i386_cleanup_dregs (void);
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/* Return a pointer to the the local mirror of the inferior's debug
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registers. */
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extern struct i386_debug_reg_state *i386_debug_reg_state (void);
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#endif /* I386_NAT_H */
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