void __unwind_start(struct unwind_state *state, struct task_struct *task,
struct pt_regs *regs, unsigned long *first_frame)
{
unsigned long *bp;
memset(state, 0, sizeof(*state));
state->task = task;
state->got_irq = (regs);
/* Don't even attempt to start from user mode regs: */
if (regs && user_mode(regs)) {
state->stack_info.type = STACK_TYPE_UNKNOWN;
return;
}
bp = get_frame_pointer(task, regs);
/* Initialize stack info and make sure the frame data is accessible: */
get_stack_info(bp, state->task, &state->stack_info,
&state->stack_mask);
update_stack_state(state, bp);
/*
* The caller can provide the address of the first frame directly
* (first_frame) or indirectly (regs->sp) to indicate which stack frame
* to start unwinding at. Skip ahead until we reach it.
*/
while (!unwind_done(state) &&
(!on_stack(&state->stack_info, first_frame, sizeof(long)) ||
state->bp < first_frame))
unwind_next_frame(state);
}
struct gdb_frame_id luajit_get_frame_id (struct gdb_reader_funcs *self,
struct gdb_unwind_callbacks *cb)
{
struct gdb_frame_id fid;
GDB_CORE_ADDR frame_pointer, code_pointer;
fid.code_address = 0;
fid.stack_address = 0;
if(!get_frame_pointer(cb,&frame_pointer) || !get_code_pointer(cb,&code_pointer))
return fid;
fid.code_address = code_pointer;
fid.stack_address = frame_pointer;
}
enum gdb_status luajit_unwind_frame (struct gdb_reader_funcs *self,
struct gdb_unwind_callbacks *cb)
{
GDB_CORE_ADDR frame_pointer;
if(!get_frame_pointer(cb,&frame_pointer))
return GDB_FAIL;
struct gdb_reg_value* new_sp = malloc(sizeof(struct gdb_reg_value) + sizeof(frame_pointer) - 1); // 4byte value
new_sp->free = &luajit_reg_value_free;
new_sp->defined = 1;
new_sp->size = 4;
memcpy(new_sp->value,&frame_pointer,sizeof(frame_pointer));
cb->reg_set(cb, TILE64_REG_SP, new_sp);
return GDB_SUCCESS;
}
void __unwind_start(struct unwind_state *state, struct task_struct *task,
struct pt_regs *regs, unsigned long *first_frame)
{
unsigned long *bp, *frame;
size_t len;
memset(state, 0, sizeof(*state));
state->task = task;
/* don't even attempt to start from user mode regs */
if (regs && user_mode(regs)) {
state->stack_info.type = STACK_TYPE_UNKNOWN;
return;
}
/* set up the starting stack frame */
bp = get_frame_pointer(task, regs);
regs = decode_frame_pointer(bp);
if (regs) {
state->regs = regs;
frame = (unsigned long *)regs;
len = sizeof(*regs);
} else {
state->bp = bp;
frame = bp;
len = FRAME_HEADER_SIZE;
}
/* initialize stack info and make sure the frame data is accessible */
get_stack_info(frame, state->task, &state->stack_info,
&state->stack_mask);
update_stack_state(state, frame, len);
/*
* The caller can provide the address of the first frame directly
* (first_frame) or indirectly (regs->sp) to indicate which stack frame
* to start unwinding at. Skip ahead until we reach it.
*/
while (!unwind_done(state) &&
(!on_stack(&state->stack_info, first_frame, sizeof(long)) ||
state->bp < first_frame))
unwind_next_frame(state);
}
