vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

newreloc on yeeloong

Browse source
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-01-23 13:30:24 +01:00
parent 3c83bc50db
commit 7d8c9ec63d
8 changed files with 126 additions and 82 deletions
Download patch file Download diff file Expand all files Collapse all files

111
lib/mips/relocator.c
View file

@ -25,26 +25,33 @@
#include <grub/cache.h>
#include <grub/mips/relocator.h>
#include <grub/relocator_private.h>
/* Remark: doesn't work with source outside of 4G.
Use relocator64 in this case.
*/
/* Do we need mips64? */
extern grub_uint8_t grub_relocator32_forward_start;
extern grub_uint8_t grub_relocator32_forward_end;
extern grub_uint8_t grub_relocator32_backward_start;
extern grub_uint8_t grub_relocator32_backward_end;
extern grub_uint8_t grub_relocator_forward_start;
extern grub_uint8_t grub_relocator_forward_end;
extern grub_uint8_t grub_relocator_backward_start;
extern grub_uint8_t grub_relocator_backward_end;
#define REGW_SIZEOF (2 * sizeof (grub_uint32_t))
#define JUMP_SIZEOF (2 * sizeof (grub_uint32_t))
#define RELOCATOR_SRC_SIZEOF(x) (&grub_relocator32_##x##_end \
- &grub_relocator32_##x##_start)
#define RELOCATOR_SRC_SIZEOF(x) (&grub_relocator_##x##_end \
- &grub_relocator_##x##_start)
#define RELOCATOR_SIZEOF(x) (RELOCATOR_SRC_SIZEOF(x) \
+ REGW_SIZEOF * (31 + 3) + JUMP_SIZEOF)
#define RELOCATOR_ALIGN 16
+ REGW_SIZEOF * 3)
grub_size_t grub_relocator_align = sizeof (grub_uint32_t);
grub_size_t grub_relocator_forward_size;
grub_size_t grub_relocator_backward_size;
grub_size_t grub_relocator_jumper_size = JUMP_SIZEOF + REGW_SIZEOF;
#define PREFIX(x) grub_relocator32_ ## x
void
grub_cpu_relocator_init (void)
{
grub_relocator_forward_size = RELOCATOR_SIZEOF(forward);
grub_relocator_backward_size = RELOCATOR_SIZEOF(backward);
}
static void
write_reg (int regn, grub_uint32_t val, void **target)
@ -69,44 +76,70 @@ write_jump (int regn, void **target)
*target = ((grub_uint32_t *) *target) + 1;
}
static void
write_call_relocator_bw (void *ptr0, void *src, grub_uint32_t dest,
grub_size_t size, struct grub_relocator32_state state)
void
grub_cpu_relocator_jumper (void *rels, grub_addr_t addr)
{
write_reg (1, addr, &rels);
write_jump (1, &rels);
}
void
grub_cpu_relocator_backward (void *ptr0, void *src, void *dest,
grub_size_t size)
{
void *ptr = ptr0;
int i;
write_reg (8, (grub_uint32_t) src, &ptr);
write_reg (9, dest, &ptr);
write_reg (10, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_backward_start,
write_reg (9, (grub_uint32_t) dest, &ptr);
write_reg (10, (grub_uint32_t) size, &ptr);
grub_memcpy (ptr, &grub_relocator_backward_start,
RELOCATOR_SRC_SIZEOF (backward));
ptr = (grub_uint8_t *) ptr + RELOCATOR_SRC_SIZEOF (backward);
for (i = 1; i < 32; i++)
write_reg (i, state.gpr[i], &ptr);
write_jump (state.jumpreg, &ptr);
grub_arch_sync_caches (ptr0, (grub_uint8_t *) ptr - (grub_uint8_t *) ptr0);
grub_dprintf ("relocator", "Backward relocator: about to jump to %p\n", ptr0);
((void (*) (void)) ptr0) ();
}
static void
write_call_relocator_fw (void *ptr0, void *src, grub_uint32_t dest,
grub_size_t size, struct grub_relocator32_state state)
void
grub_cpu_relocator_forward (void *ptr0, void *src, void *dest,
grub_size_t size)
{
void *ptr = ptr0;
int i;
write_reg (8, (grub_uint32_t) src, &ptr);
write_reg (9, dest, &ptr);
write_reg (10, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_forward_start,
write_reg (9, (grub_uint32_t) dest, &ptr);
write_reg (10, (grub_uint32_t) size, &ptr);
grub_memcpy (ptr, &grub_relocator_forward_start,
RELOCATOR_SRC_SIZEOF (forward));
ptr = (grub_uint8_t *) ptr + RELOCATOR_SRC_SIZEOF (forward);
}
grub_err_t
grub_relocator32_boot (struct grub_relocator *rel,
struct grub_relocator32_state state)
{
grub_addr_t target;
void *src, *ptr;
grub_err_t err;
grub_addr_t relst;
grub_size_t relsize;
grub_size_t stateset_size = 31 * REGW_SIZEOF + JUMP_SIZEOF;
unsigned i;
err = grub_relocator_alloc_chunk_align (rel, &src, &target, 0,
(0xffffffff - stateset_size)
+ 1, stateset_size,
sizeof (grub_uint32_t),
GRUB_RELOCATOR_PREFERENCE_NONE);
if (err)
return err;
ptr = src;
for (i = 1; i < 32; i++)
write_reg (i, state.gpr[i], &ptr);
write_jump (state.jumpreg, &ptr);
grub_arch_sync_caches (ptr0, (grub_uint8_t *) ptr - (grub_uint8_t *) ptr0);
grub_dprintf ("relocator", "Forward relocator: about to jump to %p\n", ptr0);
((void (*) (void)) ptr0) ();
}
#include "../relocator.c"
err = grub_relocator_prepare_relocs (rel, target, &relst, &relsize);
if (err)
return err;
grub_arch_sync_caches ((void *) relst, relsize);
((void (*) (void)) relst) ();
/* Not reached. */
return GRUB_ERR_NONE;
}