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#include <linux/bug.h>
#include <linux/kallsyms.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>
#include <asm/system_misc.h>
#include <asm/traps.h>
#include "mrdump_private.h"
static void mrdump_dump_backtrace(struct pt_regs *regs)
{
struct stackframe frame;
int count = 0;
if (regs == NULL) {
return;
}
frame.fp = regs->regs[29];
frame.sp = regs->sp;
frame.pc = regs->pc;
printk("Call trace:\n");
while (count++ < 32) {
unsigned long where = frame.pc;
int ret;
ret = unwind_frame(&frame);
if (ret < 0)
break;
print_ip_sym(where);
#if 0
if (in_exception_text(where))
dump_mem("", "Exception stack", frame.sp,
frame.sp + sizeof(struct pt_regs));
#endif
}
}
void mrdump_save_current_backtrace(struct pt_regs *regs)
{
asm volatile("stp x0, x1, [%0] \n\t"
"stp x2, x3, [%0, #16] \n\t"
"stp x4, x5, [%0, #32] \n\t"
"stp x6, x7, [%0, #48] \n\t"
"stp x8, x9, [%0, #64] \n\t"
"stp x10, x11, [%0, #80] \n\t"
"stp x12, x13, [%0, #96] \n\t"
"stp x14, x15, [%0, #112] \n\t"
"stp x16, x17, [%0, #128] \n\t"
"stp x18, x19, [%0, #144] \n\t"
"stp x20, x21, [%0, #160] \n\t"
"stp x22, x23, [%0, #176] \n\t"
"stp x24, x25, [%0, #192] \n\t"
"stp x26, x27, [%0, #208] \n\t"
"stp x28, x29, [%0, #224] \n\t"
"str x30, [%0, #240] \n\t"
:
:"r" (®s->user_regs)
: "memory");
asm volatile("mov x8, sp \n\t"
"str x8, [%0] \n\t"
"1: \n\t"
"adr x8, 1b \n\t"
"str x8, [%1] \n\t"
:
:"r" (®s->user_regs.sp), "r" (®s->user_regs.pc)
: "x8", "memory");
}
void mrdump_print_crash(struct pt_regs *regs)
{
__show_regs(regs);
mrdump_dump_backtrace(regs);
}
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