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Commit 154c772e authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[ARM] Update show_regs/oops register format 



Add the kernel release and version information to the output of
show_regs/oops.  Add the CPU PSR register.  Avoid using printk
to output partial lines; always output a complete line.

Re-combine the "Control" and "Table + DAC" lines after nommu
separated them; we don't want to waste vertical screen space
needlessly.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent d9202429

arch/arm/kernel/process.c

+35 −28
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/elfcore.h>

#include <linux/pm.h>

#include <linux/tick.h>

#include <linux/utsname.h>



#include <asm/leds.h>

#include <asm/processor.h>
@@ -199,16 +200,19 @@ void machine_restart(char * __unused) 


void __show_regs(struct pt_regs *regs)

{

	unsigned long flags = condition_codes(regs);

	unsigned long flags;

	char buf[64];



	printk("CPU: %d\n", smp_processor_id());

	printk("CPU: %d    %s  (%s %.*s)\n",

		smp_processor_id(), print_tainted(), init_utsname()->release,

		(int)strcspn(init_utsname()->version, " "),

		init_utsname()->version);

	print_symbol("PC is at %s\n", instruction_pointer(regs));

	print_symbol("LR is at %s\n", regs->ARM_lr);

	printk("pc : [<%08lx>]    lr : [<%08lx>]    %s\n"

	printk("pc : [<%08lx>]    lr : [<%08lx>]    psr: %08lx\n"

	       "sp : %08lx  ip : %08lx  fp : %08lx\n",

		instruction_pointer(regs),

		regs->ARM_lr, print_tainted(), regs->ARM_sp,

		regs->ARM_ip, regs->ARM_fp);

		regs->ARM_pc, regs->ARM_lr, regs->ARM_cpsr,

		regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);

	printk("r10: %08lx  r9 : %08lx  r8 : %08lx\n",

		regs->ARM_r10, regs->ARM_r9,

		regs->ARM_r8);
@@ -218,36 +222,39 @@ void __show_regs(struct pt_regs *regs) 
	printk("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",

		regs->ARM_r3, regs->ARM_r2,

		regs->ARM_r1, regs->ARM_r0);

	printk("Flags: %c%c%c%c",

		flags & PSR_N_BIT ? 'N' : 'n',

		flags & PSR_Z_BIT ? 'Z' : 'z',

		flags & PSR_C_BIT ? 'C' : 'c',

		flags & PSR_V_BIT ? 'V' : 'v');

	printk("  IRQs o%s  FIQs o%s  Mode %s%s  Segment %s\n",

		interrupts_enabled(regs) ? "n" : "ff",



	flags = regs->ARM_cpsr;

	buf[0] = flags & PSR_N_BIT ? 'N' : 'n';

	buf[1] = flags & PSR_Z_BIT ? 'Z' : 'z';

	buf[2] = flags & PSR_C_BIT ? 'C' : 'c';

	buf[3] = flags & PSR_V_BIT ? 'V' : 'v';

	buf[4] = '\0';



	printk("Flags: %s  IRQs o%s  FIQs o%s  Mode %s%s  Segment %s\n",

		buf, interrupts_enabled(regs) ? "n" : "ff",

		fast_interrupts_enabled(regs) ? "n" : "ff",

		processor_modes[processor_mode(regs)],

		thumb_mode(regs) ? " (T)" : "",

		get_fs() == get_ds() ? "kernel" : "user");

#if CONFIG_CPU_CP15

#ifdef CONFIG_CPU_CP15

	{

		unsigned int ctrl;

		  __asm__ (

		"	mrc p15, 0, %0, c1, c0\n"

		: "=r" (ctrl));

		printk("Control: %04X\n", ctrl);

	}



		buf[0] = '\0';

#ifdef CONFIG_CPU_CP15_MMU

		{

			unsigned int transbase, dac;

		  __asm__ (

		"	mrc p15, 0, %0, c2, c0\n"

			asm("mrc p15, 0, %0, c2, c0\n\t"

			    "mrc p15, 0, %1, c3, c0\n"

			    : "=r" (transbase), "=r" (dac));

		printk("Table: %08X  DAC: %08X\n",

			snprintf(buf, sizeof(buf), "  Table: %08x  DAC: %08x",

			  	transbase, dac);

		}

#endif

		asm("mrc p15, 0, %0, c1, c0\n" : "=r" (ctrl));



		printk("Control: %08x%s\n", ctrl, buf);

	}

#endif

}

include/asm-arm/ptrace.h

+0 −3
Original line number Diff line number Diff line
@@ -112,9 +112,6 @@ struct pt_regs { 
#define fast_interrupts_enabled(regs) \

	(!((regs)->ARM_cpsr & PSR_F_BIT))



#define condition_codes(regs) \

	((regs)->ARM_cpsr & (PSR_V_BIT|PSR_C_BIT|PSR_Z_BIT|PSR_N_BIT))

	

/* Are the current registers suitable for user mode?

 * (used to maintain security in signal handlers)

 */