89a5711c56
This commit implements functions for identifying and extracting extended ptrace event information from a Linux wait status. These are just convenience functions intended to hide the ">> 16" used to extract the event from the wait status word, replacing the hard-coded shift with a more descriptive function call. This is preparatory work for implementation of follow-fork and detach-on-fork for extended-remote linux targets. gdb/ChangeLog: * linux-nat.c (linux_handle_extended_wait): Call linux_ptrace_get_extended_event. (wait_lwp): Call linux_is_extended_waitstatus. (linux_nat_filter_event): Call linux_ptrace_get_extended_event and linux_is_extended_waitstatus. * nat/linux-ptrace.c (linux_test_for_tracefork): Call linux_ptrace_get_extended_event. (linux_ptrace_get_extended_event): New function. (linux_is_extended_waitstatus): New function. * nat/linux-ptrace.h (linux_ptrace_get_extended_event) (linux_is_extended_waitstatus): New declarations. gdb/gdbserver/ChangeLog: * linux-low.c (handle_extended_wait): Call linux_ptrace_get_extended_event. (get_stop_pc, get_detach_signal, linux_low_filter_event): Call linux_is_extended_waitstatus. ---
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* Copyright (C) 2011-2014 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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#ifndef COMMON_LINUX_PTRACE_H
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#define COMMON_LINUX_PTRACE_H
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struct buffer;
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#include <sys/ptrace.h>
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#ifdef __UCLIBC__
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#if !(defined(__UCLIBC_HAS_MMU__) || defined(__ARCH_HAS_MMU__))
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/* PTRACE_TEXT_ADDR and friends. */
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#include <asm/ptrace.h>
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#define HAS_NOMMU
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#endif
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#endif
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#if !defined(PTRACE_TYPE_ARG3)
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#define PTRACE_TYPE_ARG3 void *
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#endif
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#if !defined(PTRACE_TYPE_ARG4)
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#define PTRACE_TYPE_ARG4 void *
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#endif
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#ifndef PTRACE_GETSIGINFO
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# define PTRACE_GETSIGINFO 0x4202
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# define PTRACE_SETSIGINFO 0x4203
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#endif /* PTRACE_GETSIGINF */
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/* If the system headers did not provide the constants, hard-code the normal
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values. */
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#ifndef PTRACE_EVENT_FORK
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#define PTRACE_SETOPTIONS 0x4200
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#define PTRACE_GETEVENTMSG 0x4201
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/* options set using PTRACE_SETOPTIONS */
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#define PTRACE_O_TRACESYSGOOD 0x00000001
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#define PTRACE_O_TRACEFORK 0x00000002
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#define PTRACE_O_TRACEVFORK 0x00000004
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#define PTRACE_O_TRACECLONE 0x00000008
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#define PTRACE_O_TRACEEXEC 0x00000010
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#define PTRACE_O_TRACEVFORKDONE 0x00000020
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#define PTRACE_O_TRACEEXIT 0x00000040
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/* Wait extended result codes for the above trace options. */
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#define PTRACE_EVENT_FORK 1
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#define PTRACE_EVENT_VFORK 2
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#define PTRACE_EVENT_CLONE 3
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#define PTRACE_EVENT_EXEC 4
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#define PTRACE_EVENT_VFORK_DONE 5
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#define PTRACE_EVENT_EXIT 6
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#endif /* PTRACE_EVENT_FORK */
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#if (defined __bfin__ || defined __frv__ || defined __sh__) \
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&& !defined PTRACE_GETFDPIC
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#define PTRACE_GETFDPIC 31
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#define PTRACE_GETFDPIC_EXEC 0
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#define PTRACE_GETFDPIC_INTERP 1
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#endif
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/* We can't always assume that this flag is available, but all systems
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with the ptrace event handlers also have __WALL, so it's safe to use
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in some contexts. */
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#ifndef __WALL
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#define __WALL 0x40000000 /* Wait for any child. */
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#endif
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extern void linux_ptrace_attach_fail_reason (pid_t pid, struct buffer *buffer);
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extern void linux_ptrace_init_warnings (void);
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extern void linux_enable_event_reporting (pid_t pid);
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extern void linux_disable_event_reporting (pid_t pid);
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extern int linux_supports_tracefork (void);
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extern int linux_supports_traceclone (void);
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extern int linux_supports_tracevforkdone (void);
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extern int linux_supports_tracesysgood (void);
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extern void linux_ptrace_set_additional_flags (int);
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extern int linux_ptrace_get_extended_event (int wstat);
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extern int linux_is_extended_waitstatus (int wstat);
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#endif /* COMMON_LINUX_PTRACE_H */
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