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codeinfo.c
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/*
* $Id: codeinfo.c,v 1.3 1996/07/17 16:01:06 grubba Exp $
*
* Functions for handling segments of code.
*
* $Log: codeinfo.c,v $
* Revision 1.2 1996/07/01 19:16:36 grubba
* Implemented ASL and ASR.
* Changed semantics for new_codeinfo(), it doesn't allocate space for the code.
* Added PeepHoleOptimize(). At the moment it just mallocs and copies the code.
* Removed some warnings.
*
* Revision 1.1.1.1 1996/06/30 23:51:51 grubba
* Entry into CVS
*
* Revision 1.8 1996/06/30 23:06:31 grubba
* Fixed several bugs in insert_seg*().
* Added sanity checks.
*
* Revision 1.7 1996/06/19 11:08:25 grubba
* Some minor bugs fixed.
*
* Revision 1.6 1996/05/11 17:22:20 grubba
* destroy_seg added and it seems to work!
* parent pointer added to the seg_info to simplify deletion, it's hard enough anyway.
*
* Revision 1.5 1996/05/09 09:45:06 grubba
* Some more optimizations.
* Added some more sanity checks.
* Made the sanity checks optional (NDEBUG).
*
* Revision 1.4 1996/05/08 21:45:35 grubba
* Some more optimizations.
*
* Revision 1.3 1996/05/08 21:24:34 grubba
* Now seems to work.
*
* Revision 1.2 1996/05/08 07:49:15 grubba
* Optimized code size for find_seg() a bit.
*
* Revision 1.1 1996/05/08 07:24:22 grubba
* Initial revision
*
*/
/*
* Includes
*/
#include <setjmp.h>
#include <stdlib.h>
#include <stdio.h>
#include "types.h"
#include "m68k.h"
#include "codeinfo.h"
/*
* Debug
*/
#define DPRINTF(x)
#ifndef DPRINTF
#ifdef DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif /* DEBUG */
#endif /* !DPRINTF */
/*
* Globals
*/
struct seg_info *code_tree;
/*
* Prototypes
*/
static __inline__ struct seg_info *insert_seg1(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back);
static struct seg_info *insert_seg_left(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back);
static struct seg_info *insert_seg_right(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back);
static void destroy_fix_seg(struct seg_info **root, struct seg_info *seg);
static struct seg_info *new_seg(U32 maddr, U32 mend);
static void free_seg(struct seg_info *seg);
static void free_codeinfo(struct code_info *ci);
/*
* Functions
*/
/*
* Segment handling
*/
struct seg_info *find_seg(struct seg_info *root, U32 maddr)
{
if ((!root) || (maddr >= root->mmax)) {
return (NULL);
}
find_right:
/* mmax already checked */
if (maddr < root->maddr) {
if (maddr < (root->mmin & ~SEG_COLOR_RED)) {
return (NULL);
} else {
root = root->left;
goto find_left;
}
} else if (maddr < root->mend) {
return (root);
} else {
root = root->right;
goto find_right;
}
/* NOT_REACHED */
find_left:
/* mmin is already checked */
if (maddr < root->mend) {
if (maddr < root->maddr) {
root = root->left;
goto find_left;
} else {
return (root);
}
} else if (maddr < root->mmax) {
root = root->right;
goto find_right;
} else {
return (NULL);
}
/* NOT_REACHED */
}
int check_segtree_balance(struct seg_info *root, U32 min, U32 max, U32 color)
{
if (!root) {
return(0);
} else {
int ldepth = 0;
int rdepth = 0;
if (root->mmin & color) {
fprintf(stderr, "SANITY: Bad tree coloring!\n");
dump_seg_tree(root);
dump_seg_tree(code_tree);
}
if ((root->mend > max) || (root->maddr < min)) {
fprintf(stderr, "SANITY: Tree overlap 0x%08x, 0x%08x <=> 0x%08x, 0x%08x\n",
root->maddr, root->mend, min, max);
dump_seg_tree(root);
dump_seg_tree(code_tree);
}
if (root->left) {
ldepth = check_segtree_balance(root->left, root->mmin & ~SEG_COLOR_RED, root->maddr, root->mmin & SEG_COLOR_RED);
}
if (root->right) {
rdepth = check_segtree_balance(root->right, root->mend, root->mmax, root->mmin & SEG_COLOR_RED);
}
if (ldepth != rdepth) {
fprintf(stderr, "SANITY: Unbalanced tree!\n");
dump_seg_tree(root);
if (ldepth > rdepth) {
rdepth = ldepth;
} else {
ldepth = rdepth;
}
}
if (!root->mmin & SEG_COLOR_RED) {
return(ldepth + 1);
} else {
return(ldepth);
}
}
}
void check_segtree_sanity(struct seg_info *root)
{
(void)check_segtree_balance(root, 0, ~0, SEG_COLOR_RED);
}
struct seg_info *insert_seg(struct seg_info **root, U32 maddr, U32 mend)
{
struct seg_info *ret_val;
jmp_buf fastreturn;
if (!(ret_val = (struct seg_info *)setjmp(fastreturn))) {
ret_val = insert_seg1(root, maddr, mend, fastreturn);
} else if (ret_val == (struct seg_info *)1) {
/* longjmp converts NULL to 1, so we need to convert it back here */
ret_val = NULL;
}
if (*root) {
/* Color the root black, and propagate the min-value */
if ((*root)->left) {
(*root)->mmin = (*root)->left->mmin & ~SEG_COLOR_RED;
} else {
(*root)->mmin &= ~SEG_COLOR_RED;
}
/* Propagate the max-value */
if ((*root)->right) {
(*root)->mmax = (*root)->right->mmax;
}
}
#ifdef DEBUG
check_segtree_sanity(*root);
#endif
return(ret_val);
}
static __inline__ struct seg_info *insert_seg1(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back)
{
/* NOTE: Inclusive search */
if (!(*root)) {
/* Empty tree */
DPRINTF(("DEBUG: insert_seg1 EMPTY\n"));
(*root) = new_seg(maddr, mend);
return (*root);
} else if (mend <= (*root)->mend) {
if (mend <= (*root)->maddr) {
/* In left sub-tree */
DPRINTF(("DEBUG: insert_seg1 LEFT\n"));
return(insert_seg_left(root, maddr, mend, back));
#ifndef NDEBUG
} else if (mend != (*root)->mend) {
/* Sanity check */
/* OVERLAP_ERROR */
fprintf(stderr, "insert_seg1(): Overlap error\n");
return (NULL);
#endif
} else {
/* In root segment */
if (maddr < (*root)->maddr) {
/* Expand segment */
/* We know that the root node is always black
* -- no need for filtering
*/
DPRINTF(("DEBUG: insert_seg1 EXPAND ROOT\n"));
if (maddr < (*root)->mmin) {
#ifndef NDEBUG
/* Sanity check */
if ((*root)->left) {
fprintf(stderr, "insert_seg1(): Overlap error\n");
return(NULL);
}
#endif
/* This node is always black */
(*root)->mmin = maddr;
}
(*root)->maddr = maddr;
}
return(*root);
}
} else {
/* In right sub-tree */
DPRINTF(("DEBUG: insert_seg1 RIGHT\n"));
return (insert_seg_right(root, maddr, mend, back));
}
}
static struct seg_info *insert_seg_left(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back)
{
struct seg_info *ret_val;
/* NOTE: Inclusive search */
if (!(*root)->left) {
/* Empty sub-tree */
DPRINTF(("DEBUG: insert_seg_left EMPTY\n"));
(*root)->left = new_seg(maddr, mend);
(*root)->left->parent = (*root);
return ((*root)->left);
} else if (mend <= ((*root)->left)->mend) {
if (mend <= (*root)->left->maddr) {
/* In left sub-tree */
DPRINTF(("DEBUG: insert_seg_left LEFT\n"));
ret_val = insert_seg_left(&((*root)->left), maddr, mend, back);
if ((*root)->left->mmin & (*root)->left->left->mmin & SEG_COLOR_RED) {
/* Need to fix colors */
if (((*root)->right) && ((*root)->right->mmin & SEG_COLOR_RED)) {
/* CASE 1
*
* * O
* / \ / \
* O O => * *
* / /
* O O
*
*/
DPRINTF(("DEBUG: insert_seg_left CASE 1\n"));
(*root)->mmin |= SEG_COLOR_RED;
(*root)->left->mmin = (*root)->left->left->mmin & ~SEG_COLOR_RED;
(*root)->right->mmin &= ~SEG_COLOR_RED;
} else {
/* CASE 2
*
* * *
* / \ / \
* O * => O O
* / \
* O *
*
*/
struct seg_info *new_root = (*root)->left;
DPRINTF(("DEBUG: insert_seg_left CASE 2\n"));
(*root)->left = new_root->right;
if ((*root)->left) {
(*root)->left->parent = (*root);
(*root)->mmin = SEG_COLOR_RED | (*root)->left->mmin;
} else {
(*root)->mmin = SEG_COLOR_RED | (*root)->maddr;
}
new_root->parent = (*root)->parent;
new_root->right = (*root);
new_root->right->parent = new_root;
new_root->mmax = (*root)->mmax;
new_root->mmin &= ~SEG_COLOR_RED;
*root = new_root;
/* Here a fast return would be possible but for mmin on previous nodes */
}
} else {
/* Propagate mmin */
DPRINTF(("DEBUG: insert_seg_left PROPAGATE\n"));
(*root)->left->mmin = ((*root)->left->mmin & SEG_COLOR_RED) |
((*root)->left->left->mmin & ~SEG_COLOR_RED);
}
return(ret_val);
#ifndef NDEBUG
} else if (mend != (*root)->left->mend) {
/* Sanity check */
/* OVERLAP_ERROR */
fprintf(stderr, "insert_seg_left(): Overlap error\n");
/* Since we don't modify anything we can do a fast return here */
longjmp(back, (int)NULL);
#endif
} else {
/* In existing segment
*
* X
* /
* X
*
*/
DPRINTF(("DEBUG: insert_seg_left EXISTING\n"));
if (maddr < (*root)->left->maddr) {
/* Expand segment */
if (maddr < ((*root)->left->mmin & ~SEG_COLOR_RED)) {
#ifndef NDEBUG
/* Sanity check */
if ((*root)->left->left) {
fprintf(stderr, "insert_seg_left(): Overlap error\n");
/* Do a fast return */
longjmp(back, (int)NULL);
}
#endif
(*root)->left->maddr = maddr;
if ((*root)->left->left) {
/* A fast return is possible, since we havent changed color or sub-tree size */
longjmp(back, (int)((*root)->left));
} else {
(*root)->left->mmin = ((*root)->left->mmin & SEG_COLOR_RED) | maddr;
}
/* Here a fast return would be possible but for mmin on previous nodes */
return((*root)->left);
}
(*root)->left->maddr = maddr;
}
/* The mmin value remains unmodified, thus we can do a fast return */
longjmp(back, (int)(*root)->left);
}
} else {
/* In right sub-tree */
DPRINTF(("DEBUG: insert_seg_left RIGHT\n"));
ret_val = insert_seg_right(&((*root)->left), maddr, mend, back);
if ((*root)->left->mmin & (*root)->left->right->mmin & SEG_COLOR_RED) {
/* Need to fix colors */
if (((*root)->right) && ((*root)->right->mmin & SEG_COLOR_RED)) {
/* CASE 1
*
* * O
* / \ / \
* O O => * *
* \ \
* O O
*
*/
DPRINTF(("DEBUG: insert_seg_left CASE 1b\n"));
(*root)->mmin |= SEG_COLOR_RED;
(*root)->left->mmin &= ~SEG_COLOR_RED;
(*root)->right->mmin &= ~SEG_COLOR_RED;
(*root)->left->mmax = (*root)->left->right->mmax;
/* Fast return not possible here */
return(ret_val);
} else {
/* CASE 3
*
* * *
* / \ / \
* O * => O O
* \ \
* O *
*
*/
struct seg_info *new_root = (*root)->left->right;
new_root->parent = (*root)->parent;
DPRINTF(("DEBUG: insert_seg_left CASE 3\n"));
(*root)->left->right = new_root->left;
if ((*root)->left->right) {
(*root)->left->right->parent = (*root)->left;
(*root)->left->mmax = (*root)->left->right->mmax;
} else {
(*root)->left->mmax = (*root)->left->mend;
}
new_root->left = (*root)->left;
new_root->left->parent = new_root;
new_root->mmin = new_root->left->mmin & ~SEG_COLOR_RED;
(*root)->left = new_root->right;
if ((*root)->left) {
(*root)->left->parent = (*root);
(*root)->mmin = (*root)->left->mmin | SEG_COLOR_RED;
} else {
(*root)->mmin = SEG_COLOR_RED | (*root)->maddr;
}
new_root->right = (*root);
new_root->right->parent = new_root;
new_root->mmax = (*root)->mmax;
*root = new_root;
}
} else {
/* Propagate up the new maxvalue */
DPRINTF(("DEBUG: insert_seg_left PROPAGATE b\n"));
(*root)->left->mmax = (*root)->left->right->mmax;
if ((*root)->mmin & (*root)->left->mmin & SEG_COLOR_RED) {
/* We still need to propagate upwards */
return(ret_val);
}
}
/* Here a fast return *IS* possible! */
longjmp(back, (int)ret_val);
}
}
static struct seg_info *insert_seg_right(struct seg_info **root, U32 maddr, U32 mend, jmp_buf back)
{
struct seg_info *ret_val;
/* NOTE: Inclusive search */
if (!(*root)->right) {
/* Empty sub-tree */
DPRINTF(("DEBUG: insert_seg_right EMPTY\n"));
#ifndef NDEBUG
/* Sanity check */
if (maddr < (*root)->mend) {
fprintf(stderr, "insert_seg_right(): Overlap error\n");
/* Do a fast return */
longjmp(back, (int)NULL);
}
#endif
(*root)->right = new_seg(maddr, mend);
(*root)->right->parent = (*root);
return ((*root)->right);
} else if (mend <= ((*root)->right)->mend) {
if (mend <= (*root)->right->maddr) {
/* In left sub-tree */
DPRINTF(("DEBUG: insert_seg_right LEFT\n"));
ret_val = insert_seg_left(&((*root)->right), maddr, mend, back);
if ((*root)->right->mmin & (*root)->right->left->mmin & SEG_COLOR_RED) {
/* Need to fix colors */
if (((*root)->left) && ((*root)->left->mmin & SEG_COLOR_RED)) {
/* CASE 1
*
* * O
* / \ / \
* O O => * *
* / /
* O O
*
*/
DPRINTF(("DEBUG: insert_seg_right CASE 1\n"));
(*root)->mmin |= SEG_COLOR_RED;
(*root)->left->mmin &= ~SEG_COLOR_RED;
(*root)->right->mmin = (*root)->right->left->mmin & ~SEG_COLOR_RED;
/* Fast return not possible here */
return(ret_val);
} else {
/* CASE 3
*
* * *
* / \ / \
* * O => O O
* / /
* O *
*
*/
struct seg_info *new_root = (*root)->right->left;
new_root->parent = (*root)->parent;
DPRINTF(("DEBUG: insert_seg_right CASE 3\n"));
(*root)->right->left = new_root->right;
if ((*root)->right->left) {
(*root)->right->left->parent = (*root)->right;
(*root)->right->mmin = (*root)->right->left->mmin | SEG_COLOR_RED;
} else {
(*root)->right->mmin = (*root)->right->maddr | SEG_COLOR_RED;
}
new_root->right = (*root)->right;
new_root->right->parent = new_root;
new_root->mmax = new_root->right->mmax;
(*root)->right = new_root->left;
(*root)->mmin |= SEG_COLOR_RED;
if ((*root)->right) {
(*root)->right->parent = (*root);
(*root)->mmax = (*root)->right->mmax;
} else {
(*root)->mmax = (*root)->mend;
}
new_root->left = (*root);
new_root->left->parent = new_root;
new_root->mmin = (*root)->mmin & ~SEG_COLOR_RED;
*root = new_root;
}
} else {
DPRINTF(("DEBUG: insert_seg_right PROPAGATE\n"));
(*root)->right->mmin = ((*root)->right->mmin & SEG_COLOR_RED) |
((*root)->right->left->mmin & ~SEG_COLOR_RED);
if ((*root)->mmin & (*root)->right->mmin & SEG_COLOR_RED) {
/* We still need to propagate upwards */
return(ret_val);
}
}
/* Here a fast return *IS* possible! */
longjmp(back, (int)ret_val);
#ifndef NDEBUG
} else if (mend != (*root)->right->mend) {
/* Sanity check */
/* OVERLAP_ERROR */
fprintf(stderr, "insert_seg_right(): Overlap error\n");
/* Since we don't modify anything we can do a fast return */
longjmp(back, NULL);
#endif
} else {
/* In existing segment
*
* X
* \
* X
*
*/
DPRINTF(("DEBUG: insert_seg_right EXISTING\n"));
if (maddr < (*root)->right->maddr) {
/* Expand segment */
if (maddr < ((*root)->right->mmin & ~SEG_COLOR_RED)) {
#ifndef NDEBUG
/* Sanity check */
if (((*root)->right->left) || (maddr < (*root)->mend)) {
fprintf(stderr, "insert_seg_right(): Overlap error\n");
/* Do a fast return */
longjmp(back, (int)NULL);
}
#endif
if (!((*root)->right->left)) {
(*root)->right->mmin = ((*root)->right->mmin & SEG_COLOR_RED) | maddr;
}
}
(*root)->right->maddr = maddr;
}
/* Here a fast return *IS* possible, since we are on a right node */
longjmp(back, (int)(*root)->right);
}
} else {
/* In right sub-tree */
DPRINTF(("DEBUG: insert_seg_right RIGHT\n"));
ret_val = insert_seg_right(&((*root)->right), maddr, mend, back);
if ((*root)->right->mmin & (*root)->right->right->mmin & SEG_COLOR_RED) {
/* Need to fix colors */
if (((*root)->left) && ((*root)->left->mmin & SEG_COLOR_RED)) {
/* CASE 1
*
* * O
* / \ / \
* O O => * *
* \ \
* O O
*
*/
DPRINTF(("DEBUG: insert_seg_right CASE 1b\n"));
(*root)->right->mmax = (*root)->right->right->mmax;
(*root)->mmin |= SEG_COLOR_RED;
(*root)->right->mmin &= ~SEG_COLOR_RED;
(*root)->left->mmin &= ~SEG_COLOR_RED;
} else {
/* CASE 2
*
* * *
* / \ / \
* * O => O O
* \ /
* O *
*
*/
struct seg_info *new_root = (*root)->right;
DPRINTF(("DEBUG: insert_seg_right CASE 2\n"));
new_root->parent = (*root)->parent;
(*root)->right = new_root->left;
(*root)->mmin |= SEG_COLOR_RED;
if ((*root)->right) {
(*root)->right->parent = (*root);
(*root)->mmax = (*root)->right->mmax;
} else {
(*root)->mmax = (*root)->mend;
}
new_root->left = (*root);
new_root->left->parent = new_root;
new_root->mmin = (*root)->mmin & ~SEG_COLOR_RED;
*root = new_root;
/* Here a fast return would be possible but for mmax on previous nodes */
}
} else {
/* Propagate up the new maxvalue */
DPRINTF(("DEBUG: insert_seg_right PROPAGATE b\n"));
(*root)->right->mmax = (*root)->right->right->mmax;
}
return(ret_val);
}
}
__inline__ static void rotate_left_seg(struct seg_info **root, struct seg_info *seg)
{
DPRINTF(("DEBUG: rotate left_seg\n"));
seg->right->parent = seg->parent;
seg->parent = seg->right;
seg->right = seg->parent->left;
seg->parent->left = seg;
if (seg->right) {
seg->right->parent = seg;
seg->mmax = seg->right->mmax;
} else {
seg->mmax = seg->mend;
}
seg->parent->mmin = (seg->parent->mmin & SEG_COLOR_RED) |
(seg->mmin & ~SEG_COLOR_RED);
if (seg->parent->parent) {
if (seg->parent->parent->left == seg) {
seg->parent->parent->left = seg->parent;
} else {
seg->parent->parent->right = seg->parent;
}
} else {
*root = seg->parent;
}
}
__inline__ static void rotate_right_seg(struct seg_info **root, struct seg_info *seg)
{
DPRINTF(("DEBUG: rotate_right_seg\n"));
seg->left->parent = seg->parent;
seg->parent = seg->left;
seg->left = seg->parent->right;
seg->parent->right = seg;
if (seg->left) {
seg->left->parent = seg;
seg->mmin = (seg->mmin & SEG_COLOR_RED) |
(seg->left->mmin & ~SEG_COLOR_RED);
} else {
seg->mmin = (seg->mmin & SEG_COLOR_RED) | seg->maddr;
}
seg->parent->mmax = seg->mmax;
if (seg->parent->parent) {
if (seg->parent->parent->left == seg) {
seg->parent->parent->left = seg->parent;
} else {
seg->parent->parent->right = seg->parent;
}
} else {
*root = seg->parent;
}
}
static struct seg_info *min_seg(struct seg_info *root)
{
if (root) {
while (root->left) {
root = root->left;
}
}
return (root);
}
void destroy_seg(struct seg_info **root, struct seg_info *seg)
{
jmp_buf fastreturn;
struct seg_info *yseg = seg;
struct seg_info *xseg;
if (seg) {
if (seg->right) {
if (seg->left) {
yseg = min_seg(seg->right);
}
xseg = yseg->right;
} else {
xseg = yseg->left;
}
if (yseg != seg) {
seg->maddr = yseg->maddr;
seg->mend = yseg->mend;
}
if (xseg) {
xseg->parent = yseg->parent;
if (xseg->parent) {
if (xseg->parent->left == yseg) {
xseg->parent->left = xseg;
xseg->parent->mmin = (xseg->parent->mmin & SEG_COLOR_RED) |
(xseg->mmin & ~SEG_COLOR_RED);
} else {
xseg->parent->right = xseg;
xseg->parent->mmax = xseg->mmax;
}
if (!(yseg->mmin & SEG_COLOR_RED)) {
destroy_fix_seg(root, xseg);
}
} else {
*root = xseg;
}
} else {
/* First xseg is NULL */
struct seg_info *parent = yseg->parent;
if (parent) {
if (!(yseg->mmin & SEG_COLOR_RED)) {
struct seg_info *wseg;
if (parent->left == yseg) {
parent->left = NULL;
parent->mmin = (parent->mmin & SEG_COLOR_RED) | parent->maddr;
wseg = parent->right;
if (wseg->mmin & SEG_COLOR_RED) {
/* CASE 1 */
wseg->mmin &= ~SEG_COLOR_RED;
parent->mmin |= SEG_COLOR_RED;
/* Rotate left */
rotate_left_seg(root, parent);
wseg = parent->right;
}
if (((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) &&
((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED)))) {
/* CASE 2 */
wseg->mmin |= SEG_COLOR_RED;
destroy_fix_seg(root, parent);
} else {
if ((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED))) {
/* CASE 3 */
wseg->left->mmin &= ~SEG_COLOR_RED;
wseg->mmin |= SEG_COLOR_RED;
rotate_right_seg(root, wseg);
wseg = parent->right;
}
/* CASE 4 */
wseg->mmin = (parent->mmin & SEG_COLOR_RED) |
(wseg->mmin & ~SEG_COLOR_RED);
parent->mmin &= ~SEG_COLOR_RED;
if (wseg->right) {
wseg->right->mmin &= ~SEG_COLOR_RED;
}
rotate_left_seg(root, parent);
}
} else {
parent->right = NULL;
parent->mmax = parent->mend;
wseg = parent->left;
if (wseg->mmin & SEG_COLOR_RED) {
/* CASE 1 */
wseg->mmin &= ~SEG_COLOR_RED;
parent->mmin |= SEG_COLOR_RED;
/* Rotate right */
rotate_right_seg(root, parent);
wseg = parent->left;
}
if (((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) &&
((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED)))) {
/* CASE 2 */
wseg->mmin |= SEG_COLOR_RED;
destroy_fix_seg(root, parent);
} else {
if ((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) {
/* CASE 3 */
wseg->right->mmin &= ~SEG_COLOR_RED;
wseg->mmin |= SEG_COLOR_RED;
rotate_left_seg(root, wseg);
wseg = parent->left;
}
/* CASE 4 */
wseg->mmin = (parent->mmin & SEG_COLOR_RED) |
(wseg->mmin & ~SEG_COLOR_RED);
parent->mmin &= ~SEG_COLOR_RED;
if (wseg->left) {
wseg->left->mmin &= ~SEG_COLOR_RED;
}
rotate_right_seg(root, parent);
}
}
} else {
/* Deleted node was red */
if (parent->left == yseg) {
parent->left = NULL;
parent->mmin = parent->maddr;
} else {
parent->right = NULL;
parent->mmax = parent->mend;
}
}
} else {
*root = NULL;
}
}
free_seg(yseg);
}
/* Color root black */
if (*root) {
(*root)->mmin &= ~SEG_COLOR_RED;
}
}
static void destroy_fix_seg(struct seg_info **root, struct seg_info *seg)
{
struct seg_info *wseg;
while ((seg->parent) && (!(seg->mmin & SEG_COLOR_RED))) {
if (seg == seg->parent->left) {
wseg = seg->parent->right;
if (wseg->mmin & SEG_COLOR_RED) {
/* CASE 1 */
wseg->mmin &= ~SEG_COLOR_RED;
seg->parent->mmin |= SEG_COLOR_RED;
rotate_left_seg(root, seg->parent);
wseg = seg->parent->right;
}
if (((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) &&
((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED)))) {
/* CASE 2 */
wseg->mmin |= SEG_COLOR_RED;
seg = seg->parent;
} else {
if ((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED))) {
/* CASE 3 */
wseg->left->mmin &= ~SEG_COLOR_RED;
wseg->mmin |= SEG_COLOR_RED;
rotate_right_seg(root, wseg);
wseg = seg->parent->right;
}
/* CASE 4 */
wseg->mmin = (seg->parent->mmin & SEG_COLOR_RED) |
(wseg->mmin & ~SEG_COLOR_RED);
seg->parent->mmin &= ~SEG_COLOR_RED;
wseg->right->mmin &= ~SEG_COLOR_RED;
rotate_left_seg(root, seg->parent);
break;
}
} else {
wseg = seg->parent->left;
if (wseg->mmin & SEG_COLOR_RED) {
/* CASE 1 */
wseg->mmin &= ~SEG_COLOR_RED;
seg->parent->mmin |= SEG_COLOR_RED;
rotate_right_seg(root, seg->parent);
wseg = seg->parent->left;
}
if (((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) &&
((!wseg->right) || (!(wseg->right->mmin & SEG_COLOR_RED)))) {
/* CASE 2 */
wseg->mmin |= SEG_COLOR_RED;
seg = seg->parent;
} else {
if ((!wseg->left) || (!(wseg->left->mmin & SEG_COLOR_RED))) {
/* CASE 3 */
wseg->right->mmin &= ~SEG_COLOR_RED;
wseg->mmin |= SEG_COLOR_RED;
rotate_left_seg(root, wseg);
wseg = seg->parent->left;
}
/* CASE 4 */
wseg->mmin = (seg->parent->mmin & SEG_COLOR_RED) |
(wseg->mmin & ~SEG_COLOR_RED);
seg->parent->mmin &= ~SEG_COLOR_RED;
wseg->left->mmin &= ~SEG_COLOR_RED;
rotate_right_seg(root, seg->parent);
break;
}
}
}
seg->mmin &= ~SEG_COLOR_RED;
}
static __inline__ void print_space(FILE *fp, int n)
{
while (n--) {
putc(' ', fp);
}
}
static void dump_seg_tree1(struct seg_info *root, int type, U32 depth)
{
if (root) {
struct code_info *ci;
if (root->right && (root->right->parent != root)) {
fprintf(stdout, "Bad parent pointer!\n");
}
dump_seg_tree1(root->right, 1, depth + 4);
print_space(stdout, depth);
switch (type) {
case 0: putc('-', stdout);
break;
case 1: putc('/', stdout);
break;
case 2: putc('\\', stdout);
break;
}
fprintf(stdout, "%c:%x:%x:%x:%x", (root->mmin & SEG_COLOR_RED)?'O':'*',
root->mmin & ~SEG_COLOR_RED, root->maddr, root->mend, root->mmax);
for (ci = root->codeinfo; ci; ci=ci->next) {
fprintf(stdout, "->%08x", ci->maddr);
}
fprintf(stdout, "\n");
if (root->left && (root->left->parent != root)) {
fprintf(stdout, "Bad parent pointer!\n");
}
dump_seg_tree1(root->left, 2, depth + 4);
} else {
print_space(stdout, depth);
switch (type) {
case 0: fprintf(stdout, "-[]\n");
break;
case 1: fprintf(stdout, "/[]\n");
break;
case 2: fprintf(stdout, "\\[]\n");
break;
}
}
}
void dump_seg_tree(struct seg_info *root)
{
dump_seg_tree1(root, 0, 0);
}
static struct seg_info *new_seg(U32 maddr, U32 mend)
{
struct seg_info *si;
if ((si = calloc(sizeof(*si),1))) {
/* All pointers are NULL */
/* New nodes are red */
si->mmin = maddr | SEG_COLOR_RED;
si->maddr = maddr;
si->mend = mend;
si->mmax = mend;
} else {
/* FAIL */
}
return (si);
}
static void free_seg(struct seg_info *seg)
{
if (seg) {
free(seg);
}
}
/*
* codeinfo handling
*/
static void free_codeinfo(struct code_info *ci)
{
if (ci) {
free(ci);