system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-06 09:10:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix DDB to unwind across exception frames.

Browse source 
While here, add an extra line of information for exceptions and
interrupts and compress the per-frame line down to one line to match
other architectures.

Reviewed by:	mhorne, br
MFC after:	1 week
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D23508
This commit is contained in:
John Baldwin 2020-02-06 18:02:38 +00:00
parent a4964a527c
commit ecafbba5a6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=357630
1 changed files with 32 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
sys/riscv/riscv/db_trace.c
View file

@ -2,6 +2,7 @@
* Copyright (c) 2015 The FreeBSD Foundation
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
* Copyright (c) 2020 John Baldwin <jhb@FreeBSD.org>
*
* Portions of this software were developed by Semihalf under
* the sponsorship of the FreeBSD Foundation.
@ -38,15 +39,18 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/kdb.h>
#include <machine/pcb.h>
#include <sys/proc.h>
#include <ddb/ddb.h>
#include <ddb/db_sym.h>
#include <machine/pcb.h>
#include <machine/riscvreg.h>
#include <machine/stack.h>
#include <machine/vmparam.h>
void
db_md_list_watchpoints()
@ -80,9 +84,6 @@ db_stack_trace_cmd(struct unwind_state *frame)
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;
@ -94,11 +95,32 @@ db_stack_trace_cmd(struct unwind_state *frame)
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");
if (strcmp(name, "cpu_exception_handler_supervisor") == 0 ||
strcmp(name, "cpu_exception_handler_user") == 0) {
struct trapframe *tf;
tf = (struct trapframe *)(uintptr_t)frame->sp;
if (tf->tf_scause & EXCP_INTR)
db_printf("--- interrupt %ld\n",
tf->tf_scause & EXCP_MASK);
else
db_printf("--- exception %ld, tval = %#lx\n",
tf->tf_scause & EXCP_MASK,
tf->tf_stval);
frame->sp = (uint64_t)tf->tf_sp;
frame->fp = (uint64_t)tf->tf_s[0];
frame->pc = (uint64_t)tf->tf_sepc;
if (!INKERNEL(frame->fp))
break;
continue;
}
if (strcmp(name, "fork_trampoline") == 0)
break;
if (unwind_frame(frame) < 0)
break;
}
}