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/*-
* Copyright (c) 2015 The FreeBSD Foundation
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by Semihalf under
* the sponsorship of the FreeBSD Foundation.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/kdb.h>
#include <machine/pcb.h>
#include <ddb/ddb.h>
#include <ddb/db_sym.h>
#include <machine/riscvreg.h>
#include <machine/stack.h>
void
db_md_list_watchpoints()
{
}
int
db_md_clr_watchpoint(db_expr_t addr, db_expr_t size)
{
return (0);
}
int
db_md_set_watchpoint(db_expr_t addr, db_expr_t size)
{
return (0);
}
static void
db_stack_trace_cmd(struct unwind_state *frame)
{
const char *name;
db_expr_t offset;
db_expr_t value;
c_db_sym_t sym;
uint64_t pc;
while (1) {
pc = frame->pc;
if (unwind_frame(frame) < 0)
break;
sym = db_search_symbol(pc, DB_STGY_ANY, &offset);
if (sym == C_DB_SYM_NULL) {
value = 0;
name = "(null)";
} else
db_symbol_values(sym, &name, &value);
db_printf("%s() at ", name);
db_printsym(frame->pc, DB_STGY_PROC);
db_printf("\n");
db_printf("\t pc = 0x%016lx ra = 0x%016lx\n",
pc, frame->pc);
db_printf("\t sp = 0x%016lx fp = 0x%016lx\n",
frame->sp, frame->fp);
db_printf("\n");
}
}
int
db_trace_thread(struct thread *thr, int count)
{
struct unwind_state frame;
struct pcb *ctx;
if (thr != curthread) {
ctx = kdb_thr_ctx(thr);
frame.sp = (uint64_t)ctx->pcb_sp;
frame.fp = (uint64_t)ctx->pcb_s[0];
frame.pc = (uint64_t)ctx->pcb_ra;
db_stack_trace_cmd(&frame);
} else
db_trace_self();
return (0);
}
void
db_trace_self(void)
{
struct unwind_state frame;
uint64_t sp;
__asm __volatile("mv %0, sp" : "=&r" (sp));
frame.sp = sp;
frame.fp = (uint64_t)__builtin_frame_address(0);
frame.pc = (uint64_t)db_trace_self;
db_stack_trace_cmd(&frame);
}
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