[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: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/process.c

@@ -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"
-		"	mrc p15, 0, %1, c3, 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

@@ -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)
  */