static inline grub_err_t
load (grub_file_t file, void *where, grub_off_t off, grub_size_t size)
{
if (PTR_TO_UINT32 (where) + size > grub_os_area_addr + grub_os_area_size)
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"not enough memory for the module");
if (grub_file_seek (file, off) == (grub_off_t) -1)
return grub_errno;
if (grub_file_read (file, where, size)
!= (grub_ssize_t) size)
{
if (grub_errno)
return grub_errno;
else
return grub_error (GRUB_ERR_BAD_OS, "file is truncated");
}
return GRUB_ERR_NONE;
}
/* Write value (pointer to memory PLUS_HANDLE)
- (pointer to memory MINUS_HANDLE) + VALUE to ADDR assuming that the
size SIZE bytes. If PTV_NEEDED is 1 then announce it to runtime that this
value needs to be recomputed before going to virtual mode
*/
grub_err_t
grub_efiemu_write_value (void *addr, grub_uint32_t value, int plus_handle,
int minus_handle, int ptv_needed, int size)
{
/* Announce relocator to runtime */
if (ptv_needed)
{
struct grub_efiemu_ptv_rel *ptv_rels
= grub_efiemu_mm_obtain_request (ptv_handle);
if (ptv_needed && ptv_written >= ptv_alloc)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"your module didn't declare efiemu "
" relocators correctly");
if (minus_handle)
ptv_rels[ptv_written].minustype
= grub_efiemu_mm_get_type (minus_handle);
else
ptv_rels[ptv_written].minustype = 0;
if (plus_handle)
ptv_rels[ptv_written].plustype
= grub_efiemu_mm_get_type (plus_handle);
else
ptv_rels[ptv_written].plustype = 0;
ptv_rels[ptv_written].addr = PTR_TO_UINT64 (addr);
ptv_rels[ptv_written].size = size;
ptv_written++;
/* memset next value to zero to mark the end */
grub_memset (&ptv_rels[ptv_written], 0, sizeof (ptv_rels[ptv_written]));
}
/* Compute the value */
if (minus_handle)
value -= PTR_TO_UINT32 (grub_efiemu_mm_obtain_request (minus_handle));
if (plus_handle)
value += PTR_TO_UINT32 (grub_efiemu_mm_obtain_request (plus_handle));
/* Write the value */
switch (size)
{
case 8:
*((grub_uint64_t *) addr) = value;
break;
case 4:
*((grub_uint32_t *) addr) = value;
break;
case 2:
*((grub_uint16_t *) addr) = value;
break;
case 1:
*((grub_uint8_t *) addr) = value;
break;
default:
return grub_error (GRUB_ERR_BAD_ARGUMENT, "wrong symbol size");
}
return GRUB_ERR_NONE;
}
