add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/xtensa/kernel/traps.c
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@@ -503,7 +503,7 @@
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 void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)
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 {
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-	size_t len;
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+	size_t len, off = 0;
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 	if (!sp)
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 		sp = stack_pointer(task);
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@@ -512,9 +512,17 @@
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 		  kstack_depth_to_print * STACK_DUMP_ENTRY_SIZE);
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 	printk("%sStack:\n", loglvl);
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-	print_hex_dump(loglvl, " ", DUMP_PREFIX_NONE,
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-		       STACK_DUMP_LINE_SIZE, STACK_DUMP_ENTRY_SIZE,
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-		       sp, len, false);
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+	while (off < len) {
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+		u8 line[STACK_DUMP_LINE_SIZE];
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+		size_t line_len = len - off > STACK_DUMP_LINE_SIZE ?
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+			STACK_DUMP_LINE_SIZE : len - off;
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+
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+		__memcpy(line, (u8 *)sp + off, line_len);
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+		print_hex_dump(loglvl, " ", DUMP_PREFIX_NONE,
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+			       STACK_DUMP_LINE_SIZE, STACK_DUMP_ENTRY_SIZE,
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+			       line, line_len, false);
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+		off += STACK_DUMP_LINE_SIZE;
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+	}
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 	show_trace(task, sp, loglvl);
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 }
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@@ -545,5 +553,5 @@
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 	if (panic_on_oops)
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 		panic("Fatal exception");
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-	do_exit(err);
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+	make_task_dead(err);
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 }