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// SPDX-License-Identifier: BSD-2-Clause
/*-
* Copyright (c) 2015-2019 Linaro Limited
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under
* the sponsorship of the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <compiler.h>
#include <memtag.h>
#include <string.h>
#include <trace.h>
#include <types_ext.h>
#include <unw/unwind.h>
#include <util.h>
void __weak ftrace_map_lr(uint64_t *lr __unused)
{}
void __weak pauth_strip_pac(uint64_t *lr __unused)
{}
static bool copy_in_reg(uint64_t *reg, vaddr_t addr)
{
memcpy(reg, (void *)addr, sizeof(*reg));
return true;
}
bool unwind_stack_arm64(struct unwind_state_arm64 *frame,
vaddr_t stack, size_t stack_size)
{
vaddr_t fp = frame->fp;
if (fp < stack)
return false;
if (fp + sizeof(uint64_t) * 3 > stack + stack_size)
return false;
frame->sp = fp + 0x10;
/* FP to previous frame (X29) */
if (!copy_in_reg(&frame->fp, fp))
return false;
if (!frame->fp)
return false;
/* LR (X30) */
if (!copy_in_reg(&frame->pc, fp + 8))
return false;
pauth_strip_pac(&frame->pc);
ftrace_map_lr(&frame->pc);
frame->pc -= 4;
return true;
}
void print_stack_arm64(struct unwind_state_arm64 *state,
vaddr_t stack, size_t stack_size)
{
vaddr_t va = 0;
int width = 8;
trace_printf_helper_raw(TRACE_ERROR, true, "Call stack:");
ftrace_map_lr(&state->pc);
do {
va = memtag_strip_tag_vaddr((void *)state->pc);
trace_printf_helper_raw(TRACE_ERROR, true, " 0x%0*"PRIxVA,
width, va);
} while (unwind_stack_arm64(state, stack, stack_size));
}
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