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Commit bb1995d5 authored by Alan Stern's avatar Alan Stern Committed by Linus Torvalds
Browse files

x86: Make Alt-SysRq-p display the debug register contents 



This patch (as921) adds code to the show_regs() routine in i386 and x86_64
to print the contents of the debug registers along with all the others.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarRoland McGrath <roland@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 44bf4cea

arch/i386/kernel/process.c

+12 −0
Original line number Diff line number Diff line
@@ -300,6 +300,7 @@ early_param("idle", idle_setup); 
void show_regs(struct pt_regs * regs)

{

	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;

	unsigned long d0, d1, d2, d3, d6, d7;



	printk("\n");

	printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
@@ -324,6 +325,17 @@ void show_regs(struct pt_regs * regs) 
	cr3 = read_cr3();

	cr4 = read_cr4_safe();

	printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);



	get_debugreg(d0, 0);

	get_debugreg(d1, 1);

	get_debugreg(d2, 2);

	get_debugreg(d3, 3);

	printk("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",

			d0, d1, d2, d3);

	get_debugreg(d6, 6);

	get_debugreg(d7, 7);

	printk("DR6: %08lx DR7: %08lx\n", d6, d7);



	show_trace(NULL, regs, &regs->esp);

}

arch/x86_64/kernel/process.c

+10 −0
Original line number Diff line number Diff line
@@ -306,6 +306,7 @@ early_param("idle", idle_setup); 
void __show_regs(struct pt_regs * regs)

{

	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;

	unsigned long d0, d1, d2, d3, d6, d7;

	unsigned int fsindex,gsindex;

	unsigned int ds,cs,es;
@@ -350,6 +351,15 @@ void __show_regs(struct pt_regs * regs) 
	       fs,fsindex,gs,gsindex,shadowgs); 

	printk("CS:  %04x DS: %04x ES: %04x CR0: %016lx\n", cs, ds, es, cr0); 

	printk("CR2: %016lx CR3: %016lx CR4: %016lx\n", cr2, cr3, cr4);



	get_debugreg(d0, 0);

	get_debugreg(d1, 1);

	get_debugreg(d2, 2);

	printk("DR0: %016lx DR1: %016lx DR2: %016lx\n", d0, d1, d2);

	get_debugreg(d3, 3);

	get_debugreg(d6, 6);

	get_debugreg(d7, 7);

	printk("DR3: %016lx DR6: %016lx DR7: %016lx\n", d3, d6, d7);

}



void show_regs(struct pt_regs *regs)