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Commit 038fdfe9 authored by Neeraj Upadhyay's avatar Neeraj Upadhyay
Browse files

arm64: process: Do not dump memory around register 



The addresses stored in registers might not be owned
by the current VM, even though they are mapped.
To avoid stage 2 faults while accessing these regions,
remove displaying of contents around addresses stored
in registers and only show data around sp, lr, pc.

Change-Id: I1cc1deb9d7d9bbfb564fad8fbd89c114ea8a4543
Signed-off-by: default avatarNeeraj Upadhyay <neeraju@codeaurora.org>
parent b318a6e0

arch/arm64/kernel/process.c

+0 −7
Original line number Diff line number Diff line
@@ -262,19 +262,12 @@ static void show_data(unsigned long addr, int nbytes, const char *name) 
static void show_extra_register_data(struct pt_regs *regs, int nbytes)

{

	mm_segment_t fs;

	unsigned int i;



	fs = get_fs();

	set_fs(KERNEL_DS);

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

	show_data(regs->regs[30] - nbytes, nbytes * 2, "LR");

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

	for (i = 0; i < 30; i++) {

		char name[4];



		snprintf(name, sizeof(name), "X%u", i);

		show_data(regs->regs[i] - nbytes, nbytes * 2, name);

	}

	set_fs(fs);

}