/// Get value of specified register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_word_t *value) {
_LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)\n",
cursor, regNum, value);
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
if (co->validReg(regNum)) {
*value = co->getReg(regNum);
return UNW_ESUCCESS;
}
return UNW_EBADREG;
}
/// Get location of specified register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_save_loc(unw_cursor_t* cursor, int regNum,
unw_save_loc_t* location)
{
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
if (co->validReg(regNum)) {
// We only support memory locations, not register locations
location->u.addr = co->getRegLocation(regNum);
location->type = (location->u.addr == 0) ? UNW_SLT_NONE : UNW_SLT_MEMORY;
return UNW_ESUCCESS;
}
return UNW_EBADREG;
}
/// Set value of specified register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_word_t value) {
_LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%llX)\n",
static_cast<void *>(cursor), regNum, (long long)value);
typedef LocalAddressSpace::pint_t pint_t;
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
if (co->validReg(regNum)) {
co->setReg(regNum, (pint_t)value);
// specical case altering IP to re-find info (being called by personality
// function)
if (regNum == UNW_REG_IP)
co->setInfoBasedOnIPRegister(false);
return UNW_ESUCCESS;
}
return UNW_EBADREG;
}
