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Commit 8b1d1675 authored by Alistair Strachan's avatar Alistair Strachan
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Revert "ANDROID: arm: process: Add display of memory around registers when displaying regs." 



This reverts commit 8537ffb8.

This change has been deprecated in newer Android kernels, and upstream
changes to the location of kernel text broke its original purpose, so
let's just remove it.

Bug: 124903482
Change-Id: Id874a14aaf9951c3ba44d43eea3f1ef513dfe26e
Signed-off-by: default avatarAlistair Strachan <astrachan@google.com>
parent cef9f8d2

arch/arm/kernel/process.c

+0 −73
Original line number Diff line number Diff line
@@ -94,77 +94,6 @@ void arch_cpu_idle_exit(void) 
	ledtrig_cpu(CPU_LED_IDLE_END);

}



/*

 * dump a block of kernel memory from around the given address

 */

static void show_data(unsigned long addr, int nbytes, const char *name)

{

	int	i, j;

	int	nlines;

	u32	*p;



	/*

	 * don't attempt to dump non-kernel addresses or

	 * values that are probably just small negative numbers

	 */

	if (addr < PAGE_OFFSET || addr > -256UL)

		return;



	printk("\n%s: %#lx:\n", name, addr);



	/*

	 * round address down to a 32 bit boundary

	 * and always dump a multiple of 32 bytes

	 */

	p = (u32 *)(addr & ~(sizeof(u32) - 1));

	nbytes += (addr & (sizeof(u32) - 1));

	nlines = (nbytes + 31) / 32;





	for (i = 0; i < nlines; i++) {

		/*

		 * just display low 16 bits of address to keep

		 * each line of the dump < 80 characters

		 */

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

		for (j = 0; j < 8; j++) {

			u32	data;

			if (probe_kernel_address(p, data)) {

				printk(" ********");

			} else {

				printk(" %08x", data);

			}

			++p;

		}

		printk("\n");

	}

}



static void show_extra_register_data(struct pt_regs *regs, int nbytes)

{

	mm_segment_t fs;



	fs = get_fs();

	set_fs(KERNEL_DS);

	show_data(regs->ARM_pc - nbytes, nbytes * 2, "PC");

	show_data(regs->ARM_lr - nbytes, nbytes * 2, "LR");

	show_data(regs->ARM_sp - nbytes, nbytes * 2, "SP");

	show_data(regs->ARM_ip - nbytes, nbytes * 2, "IP");

	show_data(regs->ARM_fp - nbytes, nbytes * 2, "FP");

	show_data(regs->ARM_r0 - nbytes, nbytes * 2, "R0");

	show_data(regs->ARM_r1 - nbytes, nbytes * 2, "R1");

	show_data(regs->ARM_r2 - nbytes, nbytes * 2, "R2");

	show_data(regs->ARM_r3 - nbytes, nbytes * 2, "R3");

	show_data(regs->ARM_r4 - nbytes, nbytes * 2, "R4");

	show_data(regs->ARM_r5 - nbytes, nbytes * 2, "R5");

	show_data(regs->ARM_r6 - nbytes, nbytes * 2, "R6");

	show_data(regs->ARM_r7 - nbytes, nbytes * 2, "R7");

	show_data(regs->ARM_r8 - nbytes, nbytes * 2, "R8");

	show_data(regs->ARM_r9 - nbytes, nbytes * 2, "R9");

	show_data(regs->ARM_r10 - nbytes, nbytes * 2, "R10");

	set_fs(fs);

}



void __show_regs(struct pt_regs *regs)

{

	unsigned long flags;
@@ -256,8 +185,6 @@ void __show_regs(struct pt_regs *regs) 
		printk("Control: %08x%s\n", ctrl, buf);

	}

#endif



	show_extra_register_data(regs, 128);

}



void show_regs(struct pt_regs * regs)