void
offline_instru_t::insert_save_pc(void *drcontext, instrlist_t *ilist, instr_t *where,
reg_id_t reg_ptr, reg_id_t scratch, int adjust,
uint64_t value)
{
int disp = adjust;
#ifdef X64
instrlist_insert_mov_immed_ptrsz(drcontext, (ptr_int_t) value,
opnd_create_reg(scratch),
ilist, where, NULL, NULL);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext, OPND_CREATE_MEMPTR(reg_ptr, disp),
opnd_create_reg(scratch)));
#else
instrlist_insert_mov_immed_ptrsz(drcontext, (int)value,
opnd_create_reg(scratch),
ilist, where, NULL, NULL);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext, OPND_CREATE_MEMPTR(reg_ptr, disp),
opnd_create_reg(scratch)));
instrlist_insert_mov_immed_ptrsz(drcontext, (int)(value >> 32),
opnd_create_reg(scratch),
ilist, where, NULL, NULL);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext, OPND_CREATE_MEMPTR(reg_ptr, disp + 4),
opnd_create_reg(scratch)));
#endif
}
static void
insert_save_pc(void *drcontext, instrlist_t *ilist, instr_t *where, reg_id_t base,
reg_id_t scratch, app_pc pc)
{
instrlist_insert_mov_immed_ptrsz(drcontext, (ptr_int_t)pc, opnd_create_reg(scratch),
ilist, where, NULL, NULL);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext,
OPND_CREATE_MEMPTR(base, offsetof(mem_ref_t, addr)),
opnd_create_reg(scratch)));
}
static void
insert_save_addr(void *drcontext, instrlist_t *ilist, instr_t *where, opnd_t ref,
reg_id_t reg_ptr, reg_id_t reg_addr)
{
bool ok;
/* we use reg_ptr as scratch to get addr */
ok = drutil_insert_get_mem_addr(drcontext, ilist, where, ref, reg_addr, reg_ptr);
DR_ASSERT(ok);
insert_load_buf_ptr(drcontext, ilist, where, reg_ptr);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext,
OPND_CREATE_MEMPTR(reg_ptr, offsetof(mem_ref_t, addr)),
opnd_create_reg(reg_addr)));
}
void
offline_instru_t::insert_save_addr(void *drcontext, instrlist_t *ilist, instr_t *where,
reg_id_t reg_ptr, reg_id_t reg_addr, int adjust,
opnd_t ref)
{
bool ok;
int disp = adjust;
if (opnd_uses_reg(ref, reg_ptr))
drreg_get_app_value(drcontext, ilist, where, reg_ptr, reg_ptr);
if (opnd_uses_reg(ref, reg_addr))
drreg_get_app_value(drcontext, ilist, where, reg_addr, reg_addr);
// We use reg_ptr as scratch to get the address.
ok = drutil_insert_get_mem_addr(drcontext, ilist, where, ref, reg_addr, reg_ptr);
DR_ASSERT(ok);
// drutil_insert_get_mem_addr may clobber reg_ptr, so we need to re-load reg_ptr.
// XXX i#2001: determine whether we have to and avoid it when we don't.
insert_load_buf_ptr(drcontext, ilist, where, reg_ptr);
MINSERT(ilist, where,
XINST_CREATE_store(drcontext,
OPND_CREATE_MEMPTR(reg_ptr, disp),
opnd_create_reg(reg_addr)));
// We allow either 0 or all 1's as the type so no need to write anything else.
}