Differential D27357 Diff 80449 head/sys/riscv/riscv/db_trace.c

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head/sys/riscv/riscv/db_trace.c

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int		int
db_md_set_watchpoint(db_expr_t addr, db_expr_t size)		db_md_set_watchpoint(db_expr_t addr, db_expr_t size)
{		{

return (0);		return (0);
}		}

static void		static void
db_stack_trace_cmd(struct unwind_state *frame)		db_stack_trace_cmd(struct thread td, struct unwind_state frame)
{		{
const char *name;		const char *name;
db_expr_t offset;		db_expr_t offset;
db_expr_t value;		db_expr_t value;
c_db_sym_t sym;		c_db_sym_t sym;
uint64_t pc;		uint64_t pc;

while (1) {		while (1) {
Show All 10 Lines	while (1) {
db_printsym(frame->pc, DB_STGY_PROC);		db_printsym(frame->pc, DB_STGY_PROC);
db_printf("\n");		db_printf("\n");

if (strcmp(name, "cpu_exception_handler_supervisor") == 0 \|\|		if (strcmp(name, "cpu_exception_handler_supervisor") == 0 \|\|
strcmp(name, "cpu_exception_handler_user") == 0) {		strcmp(name, "cpu_exception_handler_user") == 0) {
struct trapframe *tf;		struct trapframe *tf;

tf = (struct trapframe *)(uintptr_t)frame->sp;		tf = (struct trapframe *)(uintptr_t)frame->sp;
		if (!kstack_contains(td, (vm_offset_t)tf,
		sizeof(*tf))) {
		db_printf("--- invalid trapframe %p\n", tf);
		break;
		}

if ((tf->tf_scause & SCAUSE_INTR) != 0)		if ((tf->tf_scause & SCAUSE_INTR) != 0)
db_printf("--- interrupt %ld\n",		db_printf("--- interrupt %ld\n",
tf->tf_scause & SCAUSE_CODE);		tf->tf_scause & SCAUSE_CODE);
else		else
db_printf("--- exception %ld, tval = %#lx\n",		db_printf("--- exception %ld, tval = %#lx\n",
tf->tf_scause & SCAUSE_CODE,		tf->tf_scause & SCAUSE_CODE,
tf->tf_stval);		tf->tf_stval);
frame->sp = tf->tf_sp;		frame->sp = tf->tf_sp;
frame->fp = tf->tf_s[0];		frame->fp = tf->tf_s[0];
frame->pc = tf->tf_sepc;		frame->pc = tf->tf_sepc;
if (!INKERNEL(frame->fp))		if (!INKERNEL(frame->fp))
break;		break;
continue;		continue;
}		}

if (strcmp(name, "fork_trampoline") == 0)		if (strcmp(name, "fork_trampoline") == 0)
break;		break;

if (unwind_frame(frame) < 0)		if (!unwind_frame(td, frame))
break;		break;
}		}
}		}

int		int
db_trace_thread(struct thread *thr, int count)		db_trace_thread(struct thread *thr, int count)
{		{
struct unwind_state frame;		struct unwind_state frame;
struct pcb *ctx;		struct pcb *ctx;

ctx = kdb_thr_ctx(thr);		ctx = kdb_thr_ctx(thr);

frame.sp = ctx->pcb_sp;		frame.sp = ctx->pcb_sp;
frame.fp = ctx->pcb_s[0];		frame.fp = ctx->pcb_s[0];
frame.pc = ctx->pcb_ra;		frame.pc = ctx->pcb_ra;
db_stack_trace_cmd(&frame);		db_stack_trace_cmd(thr, &frame);
return (0);		return (0);
}		}

void		void
db_trace_self(void)		db_trace_self(void)
{		{
struct unwind_state frame;		struct unwind_state frame;
uintptr_t sp;		uintptr_t sp;

__asm __volatile("mv %0, sp" : "=&r" (sp));		__asm __volatile("mv %0, sp" : "=&r" (sp));

frame.sp = sp;		frame.sp = sp;
frame.fp = (uintptr_t)__builtin_frame_address(0);		frame.fp = (uintptr_t)__builtin_frame_address(0);
frame.pc = (uintptr_t)db_trace_self;		frame.pc = (uintptr_t)db_trace_self;
db_stack_trace_cmd(&frame);		db_stack_trace_cmd(curthread, &frame);
}		}