mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/arch/xtensa/kernel/traps.c
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@@ -34,12 +34,12 @@
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 #include <linux/delay.h>
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 #include <linux/hardirq.h>
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 #include <linux/ratelimit.h>
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+#include <linux/pgtable.h>
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 #include <asm/stacktrace.h>
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 #include <asm/ptrace.h>
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 #include <asm/timex.h>
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 #include <linux/uaccess.h>
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-#include <asm/pgtable.h>
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 #include <asm/processor.h>
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 #include <asm/traps.h>
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 #include <asm/hw_breakpoint.h>
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@@ -51,7 +51,7 @@
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 extern void kernel_exception(void);
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 extern void user_exception(void);
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-extern void fast_syscall_kernel(void);
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+extern void fast_illegal_instruction_user(void);
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 extern void fast_syscall_user(void);
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 extern void fast_alloca(void);
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 extern void fast_unaligned(void);
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@@ -88,8 +88,10 @@
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 static dispatch_init_table_t __initdata dispatch_init_table[] = {
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+#ifdef CONFIG_USER_ABI_CALL0_PROBE
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+{ EXCCAUSE_ILLEGAL_INSTRUCTION,	USER,	   fast_illegal_instruction_user },
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+#endif
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 { EXCCAUSE_ILLEGAL_INSTRUCTION,	0,	   do_illegal_instruction},
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-{ EXCCAUSE_SYSTEM_CALL,		KRNL,	   fast_syscall_kernel },
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 { EXCCAUSE_SYSTEM_CALL,		USER,	   fast_syscall_user },
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 { EXCCAUSE_SYSTEM_CALL,		0,	   system_call },
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 /* EXCCAUSE_INSTRUCTION_FETCH unhandled */
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@@ -186,7 +188,7 @@
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 			    "\tEXCCAUSE is %ld\n",
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 			    current->comm, task_pid_nr(current), regs->pc,
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 			    exccause);
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-	force_sig(SIGILL, current);
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+	force_sig(SIGILL);
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 }
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 /*
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@@ -215,8 +217,8 @@
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 static inline void check_valid_nmi(void)
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 {
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-	unsigned intread = get_sr(interrupt);
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-	unsigned intenable = get_sr(intenable);
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+	unsigned intread = xtensa_get_sr(interrupt);
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+	unsigned intenable = xtensa_get_sr(intenable);
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 	BUG_ON(intread & intenable &
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 	       ~(XTENSA_INTLEVEL_ANDBELOW_MASK(PROFILING_INTLEVEL) ^
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@@ -273,8 +275,8 @@
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 	irq_enter();
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 	for (;;) {
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-		unsigned intread = get_sr(interrupt);
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-		unsigned intenable = get_sr(intenable);
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+		unsigned intread = xtensa_get_sr(interrupt);
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+		unsigned intenable = xtensa_get_sr(intenable);
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 		unsigned int_at_level = intread & intenable;
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 		unsigned level;
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@@ -308,7 +310,7 @@
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 	pr_info_ratelimited("Illegal Instruction in '%s' (pid = %d, pc = %#010lx)\n",
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 			    current->comm, task_pid_nr(current), regs->pc);
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-	force_sig(SIGILL, current);
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+	force_sig(SIGILL);
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 }
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@@ -332,7 +334,7 @@
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 			    "(pid = %d, pc = %#010lx)\n",
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 			    regs->excvaddr, current->comm,
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 			    task_pid_nr(current), regs->pc);
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-	force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr, current);
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+	force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr);
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 }
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 #endif
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@@ -356,7 +358,7 @@
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 	/* If in user mode, send SIGTRAP signal to current process */
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-	force_sig(SIGTRAP, current);
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+	force_sig(SIGTRAP);
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 }
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@@ -422,16 +424,15 @@
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 	/* Setup specific handlers. */
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 	for(i = 0; dispatch_init_table[i].cause >= 0; i++) {
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-
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 		int fast = dispatch_init_table[i].fast;
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 		int cause = dispatch_init_table[i].cause;
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 		void *handler = dispatch_init_table[i].handler;
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 		if (fast == 0)
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 			set_handler(default_handler, cause, handler);
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-		if (fast && fast & USER)
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+		if ((fast & USER) != 0)
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 			set_handler(fast_user_handler, cause, handler);
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-		if (fast && fast & KRNL)
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+		if ((fast & KRNL) != 0)
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 			set_handler(fast_kernel_handler, cause, handler);
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 	}
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@@ -478,44 +479,43 @@
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 static int show_trace_cb(struct stackframe *frame, void *data)
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 {
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+	const char *loglvl = data;
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+
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 	if (kernel_text_address(frame->pc))
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-		pr_cont(" [<%08lx>] %pB\n", frame->pc, (void *)frame->pc);
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+		printk("%s [<%08lx>] %pB\n",
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+			loglvl, frame->pc, (void *)frame->pc);
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 	return 0;
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 }
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-void show_trace(struct task_struct *task, unsigned long *sp)
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+static void show_trace(struct task_struct *task, unsigned long *sp,
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+		       const char *loglvl)
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 {
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 	if (!sp)
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 		sp = stack_pointer(task);
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-	pr_info("Call Trace:\n");
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-	walk_stackframe(sp, show_trace_cb, NULL);
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-#ifndef CONFIG_KALLSYMS
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-	pr_cont("\n");
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-#endif
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+	printk("%sCall Trace:\n", loglvl);
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+	walk_stackframe(sp, show_trace_cb, (void *)loglvl);
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 }
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-static int kstack_depth_to_print = 24;
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+#define STACK_DUMP_ENTRY_SIZE 4
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+#define STACK_DUMP_LINE_SIZE 32
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+static size_t kstack_depth_to_print = CONFIG_PRINT_STACK_DEPTH;
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-void show_stack(struct task_struct *task, unsigned long *sp)
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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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-	int i = 0;
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-	unsigned long *stack;
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+	size_t len;
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 	if (!sp)
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 		sp = stack_pointer(task);
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-	stack = sp;
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-	pr_info("Stack:\n");
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+	len = min((-(size_t)sp) & (THREAD_SIZE - STACK_DUMP_ENTRY_SIZE),
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+		  kstack_depth_to_print * STACK_DUMP_ENTRY_SIZE);
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-	for (i = 0; i < kstack_depth_to_print; i++) {
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-		if (kstack_end(sp))
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-			break;
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-		pr_cont(" %08lx", *sp++);
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-		if (i % 8 == 7)
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-			pr_cont("\n");
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-	}
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-	show_trace(task, stack);
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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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+	show_trace(task, sp, loglvl);
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 }
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 DEFINE_SPINLOCK(die_lock);
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@@ -523,15 +523,18 @@
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 void die(const char * str, struct pt_regs * regs, long err)
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 {
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 	static int die_counter;
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+	const char *pr = "";
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+
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+	if (IS_ENABLED(CONFIG_PREEMPTION))
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+		pr = IS_ENABLED(CONFIG_PREEMPT_RT) ? " PREEMPT_RT" : " PREEMPT";
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 	console_verbose();
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 	spin_lock_irq(&die_lock);
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-	pr_info("%s: sig: %ld [#%d]%s\n", str, err, ++die_counter,
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-		IS_ENABLED(CONFIG_PREEMPT) ? " PREEMPT" : "");
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+	pr_info("%s: sig: %ld [#%d]%s\n", str, err, ++die_counter, pr);
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 	show_regs(regs);
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 	if (!user_mode(regs))
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-		show_stack(NULL, (unsigned long*)regs->areg[1]);
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+		show_stack(NULL, (unsigned long *)regs->areg[1], KERN_INFO);
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 	add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
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 	spin_unlock_irq(&die_lock);