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Commit d191fe09 authored by Russell King's avatar Russell King
Browse files

ARM: Dump memory and backtrace as one printk per line 



dump_mem and dump_backtrace were both using multiple printk statements
to print each line.  With DEBUG_LL enabled, this causes OOPS to become
very difficult to read.  Solve this by only using one printk per line.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent ebd00c08

arch/arm/kernel/traps.c

+23 −19
Original line number Diff line number Diff line
@@ -50,10 +50,10 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top); 
void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)

{

#ifdef CONFIG_KALLSYMS

	printk("[<%08lx>] ", where);

	print_symbol("(%s) ", where);

	printk("from [<%08lx>] ", from);

	print_symbol("(%s)\n", from);

	char sym1[KSYM_SYMBOL_LEN], sym2[KSYM_SYMBOL_LEN];

	sprint_symbol(sym1, where);

	sprint_symbol(sym2, from);

	printk("[<%08lx>] (%s) from [<%08lx>] (%s)\n", where, sym1, from, sym2);

#else

	printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from);

#endif
@@ -83,7 +83,7 @@ static int verify_stack(unsigned long sp) 
 */

static void dump_mem(const char *str, unsigned long bottom, unsigned long top)

{

	unsigned long p = bottom & ~31;

	unsigned long first;

	mm_segment_t fs;

	int i;
@@ -97,20 +97,23 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top) 


	printk("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);



	for (p = bottom & ~31; p < top;) {

		printk("%04lx: ", p & 0xffff);

	for (first = bottom & ~31; first < top; first += 32) {

		unsigned long p;

		char str[sizeof(" 12345678") * 8 + 1];



		for (i = 0; i < 8; i++, p += 4) {

			unsigned int val;

		memset(str, ' ', sizeof(str));

		str[sizeof(str) - 1] = '\0';



			if (p < bottom || p >= top)

				printk("         ");

			else {

				__get_user(val, (unsigned long *)p);

				printk("%08x ", val);

		for (p = first, i = 0; i < 8 && p < top; i++, p += 4) {

			if (p >= bottom && p < top) {

				unsigned long val;

				if (__get_user(val, (unsigned long *)p) == 0)

					sprintf(str + i * 9, " %08lx", val);

				else

					sprintf(str + i * 9, " ????????");

			}

		}

		printk ("\n");

		printk("%04lx:%s\n", first & 0xffff, str);

	}



	set_fs(fs);
@@ -122,6 +125,7 @@ static void dump_instr(struct pt_regs *regs) 
	const int thumb = thumb_mode(regs);

	const int width = thumb ? 4 : 8;

	mm_segment_t fs;

	char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str;

	int i;



	/*
@@ -132,7 +136,6 @@ static void dump_instr(struct pt_regs *regs) 
	fs = get_fs();

	set_fs(KERNEL_DS);



	printk("Code: ");

	for (i = -4; i < 1; i++) {

		unsigned int val, bad;
@@ -142,13 +145,14 @@ static void dump_instr(struct pt_regs *regs) 
			bad = __get_user(val, &((u32 *)addr)[i]);



		if (!bad)

			printk(i == 0 ? "(%0*x) " : "%0*x ", width, val);

			p += sprintf(p, i == 0 ? "(%0*x) " : "%0*x ",

					width, val);

		else {

			printk("bad PC value.");

			p += sprintf(p, "bad PC value");

			break;

		}

	}

	printk("\n");

	printk("Code: %s\n", str);



	set_fs(fs);

}