// Uncomment the following line to enable kernel stack unwinding within gator, note it can also be defined from the Makefile
// #define GATOR_KERNEL_STACK_UNWINDING
static void kernel_backtrace(int cpu, struct pt_regs *const regs)
{
#if defined(__arm__) || defined(__aarch64__)
#ifdef GATOR_KERNEL_STACK_UNWINDING
int depth = gator_backtrace_depth;
#else
int depth = 1;
#endif
struct stackframe frame;
if (depth == 0)
depth = 1;
#if defined(__arm__)
frame.fp = regs->ARM_fp;
frame.sp = regs->ARM_sp;
frame.lr = regs->ARM_lr;
frame.pc = regs->ARM_pc;
#else
frame.fp = regs->regs[29];
frame.sp = regs->sp;
frame.pc = regs->pc;
#endif
walk_stackframe(&frame, report_trace, &depth);
#else
marshal_backtrace(PC_REG & ~1, NO_COOKIE);
#endif
}
static int report_trace(struct stackframe *frame, void *d)
{
struct module *mod;
unsigned int *depth = d, addr = frame->pc, cookie = NO_COOKIE, cpu = smp_processor_id();
if (*depth) {
mod = __module_address(addr);
if (mod) {
cookie = get_cookie(cpu, per_cpu(backtrace_buffer, cpu), current, NULL, mod, true);
addr = addr - (unsigned long)mod->module_core;
}
marshal_backtrace(addr & ~1, cookie);
(*depth)--;
}
return *depth == 0;
}
static int report_trace(struct stackframe *frame, void *d)
{
unsigned int *depth = d, cookie = NO_COOKIE;
unsigned long addr = frame->pc;
if (*depth) {
#if defined(MODULE)
unsigned int cpu = get_physical_cpu();
struct module *mod = __module_address(addr);
if (mod) {
cookie = get_cookie(cpu, current, mod->name, false);
addr = addr - (unsigned long)mod->module_core;
}
#endif
marshal_backtrace(addr & ~1, cookie);
(*depth)--;
}
return *depth == 0;
}
// Uncomment the following line to enable kernel stack unwinding within gator, note it can also be defined from the Makefile
// #define GATOR_KERNEL_STACK_UNWINDING
static void kernel_backtrace(int cpu, int buftype, struct pt_regs * const regs)
{
#if defined(__arm__)
#ifdef GATOR_KERNEL_STACK_UNWINDING
int depth = gator_backtrace_depth;
#else
int depth = 1;
#endif
struct stackframe frame;
if (depth == 0)
depth = 1;
frame.fp = regs->ARM_fp;
frame.sp = regs->ARM_sp;
frame.lr = regs->ARM_lr;
frame.pc = regs->ARM_pc;
per_cpu(backtrace_buffer, cpu) = buftype;
walk_stackframe(&frame, report_trace, &depth);
#else
marshal_backtrace(PC_REG & ~1, NO_COOKIE);
#endif
}
