248 lines
6.3 KiB
C
248 lines
6.3 KiB
C
/* Copyright (C) 2009-2018 Free Software Foundation, Inc.
|
|
Contributed by ARM Ltd.
|
|
|
|
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/>. */
|
|
|
|
#include "common-defs.h"
|
|
#include "break-common.h"
|
|
#include "nat/linux-nat.h"
|
|
#include "nat/aarch64-linux-hw-point.h"
|
|
#include "nat/aarch64-linux.h"
|
|
|
|
#include "elf/common.h"
|
|
#include "nat/gdb_ptrace.h"
|
|
#include <asm/ptrace.h>
|
|
#include <sys/uio.h>
|
|
|
|
/* Called when resuming a thread LWP.
|
|
The hardware debug registers are updated when there is any change. */
|
|
|
|
void
|
|
aarch64_linux_prepare_to_resume (struct lwp_info *lwp)
|
|
{
|
|
struct arch_lwp_info *info = lwp_arch_private_info (lwp);
|
|
|
|
/* NULL means this is the main thread still going through the shell,
|
|
or, no watchpoint has been set yet. In that case, there's
|
|
nothing to do. */
|
|
if (info == NULL)
|
|
return;
|
|
|
|
if (DR_HAS_CHANGED (info->dr_changed_bp)
|
|
|| DR_HAS_CHANGED (info->dr_changed_wp))
|
|
{
|
|
ptid_t ptid = ptid_of_lwp (lwp);
|
|
int tid = ptid_get_lwp (ptid);
|
|
struct aarch64_debug_reg_state *state
|
|
= aarch64_get_debug_reg_state (ptid_get_pid (ptid));
|
|
|
|
if (show_debug_regs)
|
|
debug_printf ("prepare_to_resume thread %d\n", tid);
|
|
|
|
/* Watchpoints. */
|
|
if (DR_HAS_CHANGED (info->dr_changed_wp))
|
|
{
|
|
aarch64_linux_set_debug_regs (state, tid, 1);
|
|
DR_CLEAR_CHANGED (info->dr_changed_wp);
|
|
}
|
|
|
|
/* Breakpoints. */
|
|
if (DR_HAS_CHANGED (info->dr_changed_bp))
|
|
{
|
|
aarch64_linux_set_debug_regs (state, tid, 0);
|
|
DR_CLEAR_CHANGED (info->dr_changed_bp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Function to call when a new thread is detected. */
|
|
|
|
void
|
|
aarch64_linux_new_thread (struct lwp_info *lwp)
|
|
{
|
|
struct arch_lwp_info *info = XNEW (struct arch_lwp_info);
|
|
|
|
/* Mark that all the hardware breakpoint/watchpoint register pairs
|
|
for this thread need to be initialized (with data from
|
|
aarch_process_info.debug_reg_state). */
|
|
DR_MARK_ALL_CHANGED (info->dr_changed_bp, aarch64_num_bp_regs);
|
|
DR_MARK_ALL_CHANGED (info->dr_changed_wp, aarch64_num_wp_regs);
|
|
|
|
lwp_set_arch_private_info (lwp, info);
|
|
}
|
|
|
|
/* See nat/aarch64-linux.h. */
|
|
|
|
void
|
|
aarch64_linux_delete_thread (struct arch_lwp_info *arch_lwp)
|
|
{
|
|
xfree (arch_lwp);
|
|
}
|
|
|
|
/* Convert native siginfo FROM to the siginfo in the layout of the
|
|
inferior's architecture TO. */
|
|
|
|
void
|
|
aarch64_compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from)
|
|
{
|
|
memset (to, 0, sizeof (*to));
|
|
|
|
to->si_signo = from->si_signo;
|
|
to->si_errno = from->si_errno;
|
|
to->si_code = from->si_code;
|
|
|
|
if (to->si_code == SI_TIMER)
|
|
{
|
|
to->cpt_si_timerid = from->si_timerid;
|
|
to->cpt_si_overrun = from->si_overrun;
|
|
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
|
}
|
|
else if (to->si_code == SI_USER)
|
|
{
|
|
to->cpt_si_pid = from->si_pid;
|
|
to->cpt_si_uid = from->si_uid;
|
|
}
|
|
else if (to->si_code < 0)
|
|
{
|
|
to->cpt_si_pid = from->si_pid;
|
|
to->cpt_si_uid = from->si_uid;
|
|
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
|
}
|
|
else
|
|
{
|
|
switch (to->si_signo)
|
|
{
|
|
case SIGCHLD:
|
|
to->cpt_si_pid = from->si_pid;
|
|
to->cpt_si_uid = from->si_uid;
|
|
to->cpt_si_status = from->si_status;
|
|
to->cpt_si_utime = from->si_utime;
|
|
to->cpt_si_stime = from->si_stime;
|
|
break;
|
|
case SIGILL:
|
|
case SIGFPE:
|
|
case SIGSEGV:
|
|
case SIGBUS:
|
|
to->cpt_si_addr = (intptr_t) from->si_addr;
|
|
break;
|
|
case SIGPOLL:
|
|
to->cpt_si_band = from->si_band;
|
|
to->cpt_si_fd = from->si_fd;
|
|
break;
|
|
default:
|
|
to->cpt_si_pid = from->si_pid;
|
|
to->cpt_si_uid = from->si_uid;
|
|
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Convert inferior's architecture siginfo FROM to native siginfo TO. */
|
|
|
|
void
|
|
aarch64_siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from)
|
|
{
|
|
memset (to, 0, sizeof (*to));
|
|
|
|
to->si_signo = from->si_signo;
|
|
to->si_errno = from->si_errno;
|
|
to->si_code = from->si_code;
|
|
|
|
if (to->si_code == SI_TIMER)
|
|
{
|
|
to->si_timerid = from->cpt_si_timerid;
|
|
to->si_overrun = from->cpt_si_overrun;
|
|
to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
|
|
}
|
|
else if (to->si_code == SI_USER)
|
|
{
|
|
to->si_pid = from->cpt_si_pid;
|
|
to->si_uid = from->cpt_si_uid;
|
|
}
|
|
if (to->si_code < 0)
|
|
{
|
|
to->si_pid = from->cpt_si_pid;
|
|
to->si_uid = from->cpt_si_uid;
|
|
to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
|
|
}
|
|
else
|
|
{
|
|
switch (to->si_signo)
|
|
{
|
|
case SIGCHLD:
|
|
to->si_pid = from->cpt_si_pid;
|
|
to->si_uid = from->cpt_si_uid;
|
|
to->si_status = from->cpt_si_status;
|
|
to->si_utime = from->cpt_si_utime;
|
|
to->si_stime = from->cpt_si_stime;
|
|
break;
|
|
case SIGILL:
|
|
case SIGFPE:
|
|
case SIGSEGV:
|
|
case SIGBUS:
|
|
to->si_addr = (void *) (intptr_t) from->cpt_si_addr;
|
|
break;
|
|
case SIGPOLL:
|
|
to->si_band = from->cpt_si_band;
|
|
to->si_fd = from->cpt_si_fd;
|
|
break;
|
|
default:
|
|
to->si_pid = from->cpt_si_pid;
|
|
to->si_uid = from->cpt_si_uid;
|
|
to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Called by libthread_db. Returns a pointer to the thread local
|
|
storage (or its descriptor). */
|
|
|
|
ps_err_e
|
|
aarch64_ps_get_thread_area (struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base,
|
|
int is_64bit_p)
|
|
{
|
|
struct iovec iovec;
|
|
uint64_t reg64;
|
|
uint32_t reg32;
|
|
|
|
if (is_64bit_p)
|
|
{
|
|
iovec.iov_base = ®64;
|
|
iovec.iov_len = sizeof (reg64);
|
|
}
|
|
else
|
|
{
|
|
iovec.iov_base = ®32;
|
|
iovec.iov_len = sizeof (reg32);
|
|
}
|
|
|
|
if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
if (is_64bit_p)
|
|
*base = (void *) (reg64 - idx);
|
|
else
|
|
*base = (void *) (uintptr_t) (reg32 - idx);
|
|
|
|
return PS_OK;
|
|
}
|