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Fixes for backwards relocator

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2009-11-26 22:51:00 +01:00
parent f93415cfee
commit bbd46b0966
2 changed files with 8 additions and 9 deletions
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4
lib/i386/relocator_asm.S
View file

@ -27,13 +27,11 @@
#ifdef __x86_64__
#define RAX %rax
#define RCX %rcx
#define RDX %rdx
#define RDI %rdi
#define RSI %rdi
#else
#define RAX %eax
#define RCX %ecx
#define RDX %edx
#define RDI %edi
#define RSI %esi
#endif
@ -97,7 +95,7 @@ RELOCATOR_VARIABLE(size)
#ifdef BACKWARD
add RCX, RSI
add RDX, RDI
add RCX, RDI
#endif
#ifndef BACKWARD

13
lib/relocator.c
View file

@ -20,6 +20,7 @@
+ (RELOCATOR_SIZEOF (backward) + RELOCATOR_ALIGN) \
+ (RELOCATOR_SIZEOF (forward) + RELOCATOR_ALIGN) \
+ (RELOCATOR_SIZEOF (backward) + RELOCATOR_ALIGN))
#define PRE_REGION_SIZE (RELOCATOR_SIZEOF (backward) + RELOCATOR_ALIGN)
void *
PREFIX (alloc) (grub_size_t size)
@ -32,7 +33,7 @@ PREFIX (alloc) (grub_size_t size)
*(grub_size_t *) playground = size;
return playground + RELOCATOR_SIZEOF (forward);
return playground + PRE_REGION_SIZE;
}
void *
@ -40,7 +41,7 @@ PREFIX (realloc) (void *relocator, grub_size_t size)
{
char *playground;
playground = (char *) relocator - RELOCATOR_SIZEOF (forward);
playground = (char *) relocator - PRE_REGION_SIZE;
playground = grub_realloc (playground, size + MAX_OVERHEAD);
if (!playground)
@ -48,14 +49,14 @@ PREFIX (realloc) (void *relocator, grub_size_t size)
*(grub_size_t *) playground = size;
return playground + RELOCATOR_SIZEOF (forward);
return playground + PRE_REGION_SIZE;
}
void
PREFIX(free) (void *relocator)
{
if (relocator)
grub_free ((char *) relocator - RELOCATOR_SIZEOF (forward));
grub_free ((char *) relocator - PRE_REGION_SIZE);
}
grub_err_t
@ -65,7 +66,7 @@ PREFIX (boot) (void *relocator, grub_uint32_t dest,
grub_size_t size;
char *playground;
playground = (char *) relocator - RELOCATOR_SIZEOF (forward);
playground = (char *) relocator - PRE_REGION_SIZE;
size = *(grub_size_t *) playground;
grub_dprintf ("relocator",
@ -94,7 +95,7 @@ PREFIX (boot) (void *relocator, grub_uint32_t dest,
if (UINT_TO_PTR (dest) >= relocator)
{
int overhead;
overhead =
overhead = dest -
ALIGN_UP (dest - RELOCATOR_SIZEOF (backward) - RELOCATOR_ALIGN,
RELOCATOR_ALIGN);
grub_dprintf ("relocator",