mirror of
https://github.com/ctm/syn68k.git
synced 2024-12-01 00:51:19 +00:00
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
#include "syn68k_private.h"
|
|
#include "backpatch.h"
|
|
#include "alloc.h"
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
|
|
void
|
|
backpatch_apply_and_free (Block *b, backpatch_t *p)
|
|
{
|
|
ptr_sized_uint value;
|
|
uint32 first_byte;
|
|
int length;
|
|
BOOL found_p;
|
|
backpatch_t **bp;
|
|
char *base;
|
|
|
|
/* Find the backpatch in the block's list and remove it. */
|
|
for (bp = &b->backpatch, found_p = FALSE; *bp != NULL; bp = &(*bp)->next)
|
|
if (*bp == p)
|
|
{
|
|
*bp = p->next;
|
|
found_p = TRUE;
|
|
break;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* Make sure we actually found it in the list. */
|
|
if (!found_p)
|
|
abort ();
|
|
#endif
|
|
|
|
if (p->target == NULL)
|
|
base = (char *)0;
|
|
else
|
|
base = (char *)p->target->compiled_code;
|
|
|
|
/* First, compute the value to write out to memory. */
|
|
first_byte = p->offset_location / 8;
|
|
length = p->num_bits;
|
|
if (p->relative_p)
|
|
{
|
|
value = ((base + p->const_offset)
|
|
- ((char *)b->compiled_code + first_byte));
|
|
}
|
|
else
|
|
{
|
|
value = ((ptr_sized_uint)(base + p->const_offset));
|
|
}
|
|
#ifndef QUADALIGN
|
|
if ((p->offset_location & 7) == 0)
|
|
{
|
|
if (length == 32)
|
|
*(uint32 *)((char *)b->compiled_code + first_byte) = value;
|
|
else if (length == 16)
|
|
*(uint16 *)((char *)b->compiled_code + first_byte) = value;
|
|
else if (length == 8)
|
|
*(uint8 *)((char *)b->compiled_code + first_byte) = value;
|
|
#if defined (__alpha)
|
|
else if (length == 64)
|
|
*(uint64 *)((char *)b->compiled_code + first_byte) = value;
|
|
#endif
|
|
else
|
|
abort ();
|
|
}
|
|
else
|
|
{
|
|
abort ();
|
|
}
|
|
#else /* QUADALIGN */
|
|
/* The whole guy had better fit in one long! */
|
|
if ((p->offset_location & ~31)
|
|
== ((p->offset_location + length - 1) & ~31))
|
|
{
|
|
uint32 *ptr = (uint32 *)((char *)b->compiled_code + first_byte);
|
|
if (length == 32)
|
|
*ptr = value;
|
|
else
|
|
{
|
|
int offset = p->offset_location & 31;
|
|
#error "Write this case"
|
|
#ifdef LITTLEENDIAN
|
|
*ptr = (*ptr & ) | ;
|
|
#else /* !LITTLEENDIAN */
|
|
*ptr = (*ptr & ) | ;
|
|
#endif /* !LITTLEENDIAN */
|
|
}
|
|
}
|
|
else
|
|
abort ();
|
|
#endif /* QUADALIGN */
|
|
|
|
free (p);
|
|
}
|
|
|
|
|
|
void
|
|
backpatch_add (Block *b, int offset_location, int num_bits, BOOL relative_p,
|
|
int const_offset, Block *target)
|
|
{
|
|
backpatch_t *p;
|
|
|
|
#ifdef DEBUG
|
|
if (num_bits == 0)
|
|
abort ();
|
|
#endif
|
|
|
|
p = (backpatch_t *) xmalloc (sizeof *p);
|
|
p->next = b->backpatch;
|
|
p->offset_location = offset_location;
|
|
p->num_bits = num_bits;
|
|
p->relative_p = relative_p;
|
|
p->const_offset = const_offset;
|
|
p->target = target;
|
|
|
|
/* Prepend this guy to the block's list. */
|
|
b->backpatch = p;
|
|
}
|