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/* Code for native debugging support for GNU/Linux (LWP layer).
Copyright (C) 2000-2019 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 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/>. */
#ifndef NAT_LINUX_NAT_H
#define NAT_LINUX_NAT_H
#include "target/waitstatus.h"
struct lwp_info;
struct arch_lwp_info;
/* This is the kernel's hard limit. Not to be confused with SIGRTMIN. */
#ifndef __SIGRTMIN
#define __SIGRTMIN 32
#endif
/* Unlike other extended result codes, WSTOPSIG (status) on
PTRACE_O_TRACESYSGOOD syscall events doesn't return SIGTRAP, but
instead SIGTRAP with bit 7 set. */
#define SYSCALL_SIGTRAP (SIGTRAP | 0x80)
/* Return the ptid of the current lightweight process. With NPTL
threads and LWPs map 1:1, so this is equivalent to returning the
ptid of the current thread. This function must be provided by
the client. */
extern ptid_t current_lwp_ptid (void);
/* Function type for the CALLBACK argument of iterate_over_lwps. */
typedef int (iterate_over_lwps_ftype) (struct lwp_info *lwp, void *arg);
/* Iterate over all LWPs. Calls CALLBACK with its second argument set
to DATA for every LWP in the list. If CALLBACK returns nonzero for
a particular LWP, return a pointer to the structure describing that
LWP immediately. Otherwise return NULL. This function must be
provided by the client. */
extern struct lwp_info *iterate_over_lwps (ptid_t filter,
iterate_over_lwps_ftype callback,
void *data);
/* Return the ptid of LWP. */
extern ptid_t ptid_of_lwp (struct lwp_info *lwp);
/* Set the architecture-specific data of LWP. This function must be
provided by the client. */
extern void lwp_set_arch_private_info (struct lwp_info *lwp,
struct arch_lwp_info *info);
/* Return the architecture-specific data of LWP. This function must
be provided by the client. */
extern struct arch_lwp_info *lwp_arch_private_info (struct lwp_info *lwp);
/* Return nonzero if LWP is stopped, zero otherwise. This function
must be provided by the client. */
extern int lwp_is_stopped (struct lwp_info *lwp);
/* Return the reason the LWP last stopped. This function must be
provided by the client. */
extern enum target_stop_reason lwp_stop_reason (struct lwp_info *lwp);
/* Cause LWP to stop. This function must be provided by the
client. */
extern void linux_stop_lwp (struct lwp_info *lwp);
/* Return nonzero if we are single-stepping this LWP at the ptrace
level. */
extern int lwp_is_stepping (struct lwp_info *lwp);
#endif /* NAT_LINUX_NAT_H */
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