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first linux boot

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This commit is contained in:
phcoder 2009-10-17 12:18:39 +02:00
parent ea818634b5
commit a45337b5d7
4 changed files with 20 additions and 18 deletions
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8
lib/mips/relocator.c
View file

@ -53,7 +53,7 @@ write_reg (int regn, grub_uint32_t val, void **target)
*target = ((grub_uint32_t *) *target) + 1;
/* addiu $r, $r, val. */
*(grub_uint32_t *) *target = (((0x2400 | regn << 5 | regn) << 16)
| ((val + 0x8000) >> 16));
| (val & 0xffff));
*target = ((grub_uint32_t *) *target) + 1;
}
@ -76,10 +76,11 @@ write_call_relocator_bw (void *ptr0, void *src, grub_uint32_t dest,
write_reg (4, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_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);
((void (*) ())ptr0) ();
((void (*) ()) ptr0) ();
}
static void
@ -93,10 +94,11 @@ write_call_relocator_fw (void *ptr0, void *src, grub_uint32_t dest,
write_reg (4, size, &ptr);
grub_memcpy (ptr, &grub_relocator32_forward_start,
RELOCATOR_SRC_SIZEOF (forward));
ptr = (grub_uint8_t *) ptr + RELOCATOR_SRC_SIZEOF (forward);
for (i = 1; i < 32; i++)
write_reg (i, state.gpr[i], &ptr);
write_jump (state.jumpreg, &ptr);
((void (*) ())ptr0) ();
((void (*) ()) ptr0) ();
}
#include "../relocator.c"

4
lib/mips/relocator_asm.S
View file

@ -30,6 +30,8 @@ VARIABLE (grub_relocator32_forward_start)
copycont1:
lb $5,0($2)
sb $5,0($3)
addiu $2, $2, 0x1
addiu $3, $3, 0x1
addiu $4, $4, 0xffff
subu $5,$4,$0
bne $5, $0, copycont1
@ -44,6 +46,8 @@ VARIABLE (grub_relocator32_backward_start)
copycont2:
lb $5,0($2)
sb $5,0($3)
addiu $2, $2, 0xffff
addiu $3, $3, 0xffff
addiu $4, 0xffff
subu $5,$4,$0
bne $5, $0, copycont2