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810 lines
17 KiB
C
810 lines
17 KiB
C
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/*
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* File types.c - datatype handling stuff for internal debugger.
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*
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* Copyright (C) 1997, Eric Youngdale.
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*
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* This really doesn't do much at the moment, but it forms the framework
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* upon which full support for datatype handling will eventually be hung.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <strings.h>
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#include <unistd.h>
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#include <malloc.h>
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#include "win.h"
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#include "pe_image.h"
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#include "peexe.h"
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#include "debugger.h"
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#include "peexe.h"
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#include "xmalloc.h"
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#define NR_TYPE_HASH 521
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struct en_values
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{
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struct en_values* next;
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char * name;
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int value;
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};
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struct member
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{
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struct member * next;
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char * name;
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struct datatype * type;
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int offset;
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int size;
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};
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struct datatype
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{
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enum debug_type type;
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struct datatype * next;
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char * name;
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union
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{
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struct
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{
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char basic_type;
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char * output_format;
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char basic_size;
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unsigned b_signed:1;
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} basic;
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struct
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{
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unsigned short bitoff;
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unsigned short nbits;
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struct datatype * basetype;
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} bitfield;
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struct
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{
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struct datatype * pointsto;
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} pointer;
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struct
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{
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struct datatype * rettype;
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} funct;
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struct
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{
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int start;
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int end;
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struct datatype * basictype;
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} array;
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struct
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{
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int size;
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struct member * members;
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} structure;
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struct
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{
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struct en_values * members;
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} enumeration;
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} un;
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};
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#define BASIC_INT 1
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#define BASIC_CHAR 2
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#define BASIC_LONG 3
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#define BASIC_UINT 4
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#define BASIC_LUI 5
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#define BASIC_LONGLONG 6
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#define BASIC_ULONGLONGI 7
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#define BASIC_SHORT 8
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#define BASIC_SHORTUI 9
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#define BASIC_SCHAR 10
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#define BASIC_UCHAR 11
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#define BASIC_FLT 12
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#define BASIC_LONG_DOUBLE 13
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#define BASIC_DOUBLE 14
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#define BASIC_CMPLX_INT 15
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#define BASIC_CMPLX_FLT 16
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#define BASIC_CMPLX_DBL 17
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#define BASIC_CMPLX_LONG_DBL 18
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#define BASIC_VOID 19
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struct datatype * DEBUG_TypeInt = NULL;
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struct datatype * DEBUG_TypeIntConst = NULL;
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struct datatype * DEBUG_TypeUSInt = NULL;
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struct datatype * DEBUG_TypeString = NULL;
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/*
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* All of the types that have been defined so far.
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*/
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static struct datatype * type_hash_table[NR_TYPE_HASH + 1];
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static struct datatype * pointer_types = NULL;
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static unsigned int type_hash( const char * name )
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{
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unsigned int hash = 0;
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unsigned int tmp;
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const char * p;
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p = name;
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while (*p)
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{
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hash = (hash << 4) + *p++;
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if( (tmp = (hash & 0xf0000000)) )
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{
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hash ^= tmp >> 24;
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}
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hash &= ~tmp;
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}
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return hash % NR_TYPE_HASH;
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}
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static struct datatype *
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DEBUG_InitBasic(int type, char * name, int size, int b_signed,
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char * output_format)
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{
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int hash;
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struct datatype * dt;
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dt = (struct datatype *) xmalloc(sizeof(struct datatype));
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if( dt != NULL )
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{
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if( name != NULL )
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{
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hash = type_hash(name);
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}
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else
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{
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hash = NR_TYPE_HASH;
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}
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dt->type = BASIC;
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dt->name = name;
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dt->next = type_hash_table[hash];
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type_hash_table[hash] = dt;
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dt->un.basic.basic_type = type;
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dt->un.basic.basic_size = size;
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dt->un.basic.b_signed = b_signed;
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dt->un.basic.output_format = output_format;
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}
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return dt;
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}
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struct datatype *
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DEBUG_NewDataType(enum debug_type xtype, const char * typename)
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{
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struct datatype * dt = NULL;
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int hash;
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/*
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* The last bucket is special, and is used to hold typeless names.
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*/
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if( typename == NULL )
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{
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hash = NR_TYPE_HASH;
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}
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else
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{
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hash = type_hash(typename);
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}
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if( typename != NULL )
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{
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for( dt = type_hash_table[hash]; dt; dt = dt->next )
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{
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if( xtype != dt->type || dt->name == NULL
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|| dt->name[0] != typename[0])
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{
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continue;
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}
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if( strcmp(dt->name, typename) == 0 )
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{
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return dt;
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}
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}
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}
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if( dt == NULL )
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{
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dt = (struct datatype *) xmalloc(sizeof(struct datatype));
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if( dt != NULL )
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{
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memset(dt, 0, sizeof(*dt));
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dt->type = xtype;
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if( typename != NULL )
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{
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dt->name = xstrdup(typename);
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}
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else
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{
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dt->name = NULL;
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}
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if( xtype == POINTER )
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{
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dt->next = pointer_types;
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pointer_types = dt;
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}
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else
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{
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dt->next = type_hash_table[hash];
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type_hash_table[hash] = dt;
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}
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}
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}
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return dt;
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}
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struct datatype *
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DEBUG_FindOrMakePointerType(struct datatype * reftype)
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{
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struct datatype * dt = NULL;
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if( reftype != NULL )
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{
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for( dt = pointer_types; dt; dt = dt->next )
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{
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if( dt->type != POINTER )
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{
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continue;
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}
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if( dt->un.pointer.pointsto == reftype )
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{
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return dt;
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}
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}
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}
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if( dt == NULL )
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{
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dt = (struct datatype *) xmalloc(sizeof(struct datatype));
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if( dt != NULL )
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{
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dt->type = POINTER;
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dt->un.pointer.pointsto = reftype;
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dt->next = pointer_types;
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pointer_types = dt;
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}
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}
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return dt;
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}
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void
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DEBUG_InitTypes()
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{
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static int beenhere = 0;
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struct datatype * chartype;
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if( beenhere++ != 0 )
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{
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return;
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}
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/*
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* Special version of int used with constants of various kinds.
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*/
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DEBUG_TypeIntConst = DEBUG_InitBasic(BASIC_INT,NULL,4,1,"%d");
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/*
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* Initialize a few builtin types.
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*/
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DEBUG_TypeInt = DEBUG_InitBasic(BASIC_INT,"int",4,1,"%d");
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chartype = DEBUG_InitBasic(BASIC_CHAR,"char",1,1,"'%c'");
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DEBUG_InitBasic(BASIC_LONG,"long int",4,1,"%d");
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DEBUG_TypeUSInt = DEBUG_InitBasic(BASIC_UINT,"unsigned int",4,0,"%d");
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DEBUG_InitBasic(BASIC_LUI,"long unsigned int",4,0,"%d");
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DEBUG_InitBasic(BASIC_LONGLONG,"long long int",8,1,"%ld");
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DEBUG_InitBasic(BASIC_ULONGLONGI,"long long unsigned int",8,0,"%ld");
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DEBUG_InitBasic(BASIC_SHORT,"short int",2,1,"%d");
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DEBUG_InitBasic(BASIC_SHORTUI,"short unsigned int",2,0,"%d");
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DEBUG_InitBasic(BASIC_SCHAR,"signed char",1,1,"'%c'");
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DEBUG_InitBasic(BASIC_UCHAR,"unsigned char",1,0,"'%c'");
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DEBUG_InitBasic(BASIC_FLT,"float",4,0,"%f");
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DEBUG_InitBasic(BASIC_LONG_DOUBLE,"double",8,0,"%lf");
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DEBUG_InitBasic(BASIC_DOUBLE,"long double",12,0,NULL);
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DEBUG_InitBasic(BASIC_CMPLX_INT,"complex int",8,1,NULL);
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DEBUG_InitBasic(BASIC_CMPLX_FLT,"complex float",8,0,NULL);
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DEBUG_InitBasic(BASIC_CMPLX_DBL,"complex double",16,0,NULL);
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DEBUG_InitBasic(BASIC_CMPLX_LONG_DBL,"complex long double",24,0,NULL);
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DEBUG_InitBasic(BASIC_VOID,"void",0,0,NULL);
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DEBUG_TypeString = DEBUG_NewDataType(POINTER, NULL);
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DEBUG_SetPointerType(DEBUG_TypeString, chartype);
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/*
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* Now initialize the builtins for codeview.
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*/
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DEBUG_InitCVDataTypes();
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}
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long long int
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DEBUG_GetExprValue(DBG_ADDR * addr, char ** format)
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{
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unsigned int rtn;
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struct datatype * type2 = NULL;
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struct en_values * e;
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char * def_format = "0x%x";
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rtn = 0;
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assert(addr->type != NULL);
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switch(addr->type->type)
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{
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case BASIC:
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memcpy(&rtn, (char *) addr->off, addr->type->un.basic.basic_size);
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if( (addr->type->un.basic.b_signed)
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&& ((addr->type->un.basic.basic_size & 3) != 0)
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&& ((rtn >> (addr->type->un.basic.basic_size * 8 - 1)) != 0) )
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{
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rtn = rtn | ((-1) << (addr->type->un.basic.basic_size * 8));
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}
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if( addr->type->un.basic.output_format != NULL )
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{
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def_format = addr->type->un.basic.output_format;
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}
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/*
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* Check for single character prints that are out of range.
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*/
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if( addr->type->un.basic.basic_size == 1
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&& strcmp(def_format, "'%c'") == 0
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&& ((rtn < 0x20) || (rtn > 0x80)) )
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{
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def_format = "%d";
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}
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break;
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case POINTER:
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if (!DBG_CHECK_READ_PTR( addr, 1 )) return 0;
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rtn = (unsigned int) *((unsigned char **)addr->off);
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type2 = addr->type->un.pointer.pointsto;
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if( type2->type == BASIC && type2->un.basic.basic_size == 1 )
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{
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def_format = "\"%s\"";
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break;
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}
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else
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{
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def_format = "0x%8.8x";
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}
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break;
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case ARRAY:
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case STRUCT:
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if (!DBG_CHECK_READ_PTR( addr, 1 )) return 0;
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rtn = (unsigned int) *((unsigned char **)addr->off);
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def_format = "0x%8.8x";
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break;
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case ENUM:
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rtn = (unsigned int) *((unsigned char **)addr->off);
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for(e = addr->type->un.enumeration.members; e; e = e->next )
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{
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if( e->value == rtn )
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{
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break;
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}
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}
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if( e != NULL )
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{
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rtn = (int) e->name;
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def_format = "%s";
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}
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else
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{
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def_format = "%d";
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}
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break;
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default:
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rtn = 0;
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break;
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}
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if( format != NULL )
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{
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*format = def_format;
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}
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return rtn;
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}
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unsigned int
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DEBUG_TypeDerefPointer(DBG_ADDR * addr, struct datatype ** newtype)
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{
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/*
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* Make sure that this really makes sense.
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*/
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if( addr->type->type != POINTER )
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{
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*newtype = NULL;
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return 0;
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}
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*newtype = addr->type->un.pointer.pointsto;
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return *(unsigned int*) (addr->off);
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}
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unsigned int
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DEBUG_FindStructElement(DBG_ADDR * addr, const char * ele_name, int * tmpbuf)
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{
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struct member * m;
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unsigned int mask;
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/*
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* Make sure that this really makes sense.
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*/
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if( addr->type->type != STRUCT )
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{
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addr->type = NULL;
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return FALSE;
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}
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for(m = addr->type->un.structure.members; m; m = m->next)
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{
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if( strcmp(m->name, ele_name) == 0 )
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{
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addr->type = m->type;
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if( (m->offset & 7) != 0 || (m->size & 7) != 0)
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{
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/*
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* Bitfield operation. We have to extract the field and store
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* it in a temporary buffer so that we get it all right.
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*/
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*tmpbuf = ((*(int* ) (addr->off + (m->offset >> 3))) >> (m->offset & 7));
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addr->off = (int) tmpbuf;
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mask = 0xffffffff << (m->size);
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*tmpbuf &= ~mask;
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/*
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* OK, now we have the correct part of the number.
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* Check to see whether the basic type is signed or not, and if so,
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* we need to sign extend the number.
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*/
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if( m->type->type == BASIC && m->type->un.basic.b_signed != 0
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&& (*tmpbuf & (1 << (m->size - 1))) != 0 )
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{
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*tmpbuf |= mask;
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}
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}
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else
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{
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||
|
addr->off += (m->offset >> 3);
|
||
|
}
|
||
|
return TRUE;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
addr->type = NULL;
|
||
|
return FALSE;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_SetStructSize(struct datatype * dt, int size)
|
||
|
{
|
||
|
assert(dt->type == STRUCT);
|
||
|
dt->un.structure.size = size;
|
||
|
dt->un.structure.members = NULL;
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_CopyFieldlist(struct datatype * dt, struct datatype * dt2)
|
||
|
{
|
||
|
|
||
|
assert( dt->type == dt2->type && ((dt->type == STRUCT) || (dt->type == ENUM)));
|
||
|
|
||
|
if( dt->type == STRUCT )
|
||
|
{
|
||
|
dt->un.structure.members = dt2->un.structure.members;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
dt->un.enumeration.members = dt2->un.enumeration.members;
|
||
|
}
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_AddStructElement(struct datatype * dt, char * name, struct datatype * type,
|
||
|
int offset, int size)
|
||
|
{
|
||
|
struct member * m;
|
||
|
struct member * last;
|
||
|
struct en_values * e;
|
||
|
|
||
|
if( dt->type == STRUCT )
|
||
|
{
|
||
|
for(last = dt->un.structure.members; last; last = last->next)
|
||
|
{
|
||
|
if( (last->name[0] == name[0])
|
||
|
&& (strcmp(last->name, name) == 0) )
|
||
|
{
|
||
|
return TRUE;
|
||
|
}
|
||
|
if( last->next == NULL )
|
||
|
{
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
m = (struct member *) xmalloc(sizeof(struct member));
|
||
|
if( m == FALSE )
|
||
|
{
|
||
|
return FALSE;
|
||
|
}
|
||
|
|
||
|
m->name = xstrdup(name);
|
||
|
m->type = type;
|
||
|
m->offset = offset;
|
||
|
m->size = size;
|
||
|
if( last == NULL )
|
||
|
{
|
||
|
m->next = dt->un.structure.members;
|
||
|
dt->un.structure.members = m;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
last->next = m;
|
||
|
m->next = NULL;
|
||
|
}
|
||
|
/*
|
||
|
* If the base type is bitfield, then adjust the offsets here so that we
|
||
|
* are able to look things up without lots of falter-all.
|
||
|
*/
|
||
|
if( type->type == BITFIELD )
|
||
|
{
|
||
|
m->offset += m->type->un.bitfield.bitoff;
|
||
|
m->size = m->type->un.bitfield.nbits;
|
||
|
m->type = m->type->un.bitfield.basetype;
|
||
|
}
|
||
|
}
|
||
|
else if( dt->type == ENUM )
|
||
|
{
|
||
|
e = (struct en_values *) xmalloc(sizeof(struct en_values));
|
||
|
if( e == FALSE )
|
||
|
{
|
||
|
return FALSE;
|
||
|
}
|
||
|
|
||
|
e->name = xstrdup(name);
|
||
|
e->value = offset;
|
||
|
e->next = dt->un.enumeration.members;
|
||
|
dt->un.enumeration.members = e;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
assert(FALSE);
|
||
|
}
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
struct datatype *
|
||
|
DEBUG_GetPointerType(struct datatype * dt)
|
||
|
{
|
||
|
if( dt->type == POINTER )
|
||
|
{
|
||
|
return dt->un.pointer.pointsto;
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_SetPointerType(struct datatype * dt, struct datatype * dt2)
|
||
|
{
|
||
|
switch(dt->type)
|
||
|
{
|
||
|
case POINTER:
|
||
|
dt->un.pointer.pointsto = dt2;
|
||
|
break;
|
||
|
case FUNC:
|
||
|
dt->un.funct.rettype = dt2;
|
||
|
break;
|
||
|
default:
|
||
|
assert(FALSE);
|
||
|
}
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_SetArrayParams(struct datatype * dt, int min, int max, struct datatype * dt2)
|
||
|
{
|
||
|
assert(dt->type == ARRAY);
|
||
|
dt->un.array.start = min;
|
||
|
dt->un.array.end = max;
|
||
|
dt->un.array.basictype = dt2;
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
DEBUG_SetBitfieldParams(struct datatype * dt, int offset, int nbits,
|
||
|
struct datatype * dt2)
|
||
|
{
|
||
|
assert(dt->type == BITFIELD);
|
||
|
dt->un.bitfield.bitoff = offset;
|
||
|
dt->un.bitfield.nbits = nbits;
|
||
|
dt->un.bitfield.basetype = dt2;
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
int DEBUG_GetObjectSize(struct datatype * dt)
|
||
|
{
|
||
|
if( dt == NULL )
|
||
|
{
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
switch(dt->type)
|
||
|
{
|
||
|
case BASIC:
|
||
|
return dt->un.basic.basic_size;
|
||
|
case POINTER:
|
||
|
return sizeof(int *);
|
||
|
case STRUCT:
|
||
|
return dt->un.structure.size;
|
||
|
case ENUM:
|
||
|
return sizeof(int);
|
||
|
case ARRAY:
|
||
|
return (dt->un.array.end - dt->un.array.start)
|
||
|
* DEBUG_GetObjectSize(dt->un.array.basictype);
|
||
|
case BITFIELD:
|
||
|
/*
|
||
|
* Bitfields have to be handled seperately later on
|
||
|
* when we insert the element into the structure.
|
||
|
*/
|
||
|
return 0;
|
||
|
case TYPEDEF:
|
||
|
case FUNC:
|
||
|
case CONST:
|
||
|
assert(FALSE);
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
unsigned int
|
||
|
DEBUG_ArrayIndex(DBG_ADDR * addr, DBG_ADDR * result, int index)
|
||
|
{
|
||
|
int size;
|
||
|
|
||
|
/*
|
||
|
* Make sure that this really makes sense.
|
||
|
*/
|
||
|
if( addr->type->type == POINTER )
|
||
|
{
|
||
|
/*
|
||
|
* Get the base type, so we know how much to index by.
|
||
|
*/
|
||
|
size = DEBUG_GetObjectSize(addr->type->un.pointer.pointsto);
|
||
|
result->type = addr->type->un.pointer.pointsto;
|
||
|
result->off = (*(unsigned int*) (addr->off)) + size * index;
|
||
|
}
|
||
|
else if (addr->type->type == ARRAY)
|
||
|
{
|
||
|
size = DEBUG_GetObjectSize(addr->type->un.array.basictype);
|
||
|
result->type = addr->type->un.array.basictype;
|
||
|
result->off = addr->off + size * (index - addr->type->un.array.start);
|
||
|
}
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
/***********************************************************************
|
||
|
* DEBUG_Print
|
||
|
*
|
||
|
* Implementation of the 'print' command.
|
||
|
*/
|
||
|
void DEBUG_Print( const DBG_ADDR *addr, int count, char format, int level )
|
||
|
{
|
||
|
DBG_ADDR addr1;
|
||
|
int i;
|
||
|
struct member * m;
|
||
|
char * pnt;
|
||
|
int size;
|
||
|
long long int value;
|
||
|
|
||
|
if (count != 1)
|
||
|
{
|
||
|
fprintf( stderr, "Count other than 1 is meaningless in 'print' command\n" );
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if( addr->type == NULL )
|
||
|
{
|
||
|
fprintf(stderr, "Unable to evaluate expression\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if( format == 'i' || format == 's' || format == 'w' || format == 'b' )
|
||
|
{
|
||
|
fprintf( stderr, "Format specifier '%c' is meaningless in 'print' command\n", format );
|
||
|
format = '\0';
|
||
|
}
|
||
|
|
||
|
switch(addr->type->type)
|
||
|
{
|
||
|
case BASIC:
|
||
|
case ENUM:
|
||
|
case CONST:
|
||
|
case POINTER:
|
||
|
DEBUG_PrintBasic(addr, 1, format);
|
||
|
break;
|
||
|
case STRUCT:
|
||
|
fprintf(stderr, "{");
|
||
|
for(m = addr->type->un.structure.members; m; m = m->next)
|
||
|
{
|
||
|
addr1 = *addr;
|
||
|
DEBUG_FindStructElement(&addr1, m->name,
|
||
|
(int *) &value);
|
||
|
fprintf(stderr, "%s=", m->name);
|
||
|
DEBUG_Print(&addr1, 1, format, level + 1);
|
||
|
if( m->next != NULL )
|
||
|
{
|
||
|
fprintf(stderr, ", ");
|
||
|
}
|
||
|
}
|
||
|
fprintf(stderr, "}");
|
||
|
break;
|
||
|
case ARRAY:
|
||
|
/*
|
||
|
* Loop over all of the entries, printing stuff as we go.
|
||
|
*/
|
||
|
size = DEBUG_GetObjectSize(addr->type->un.array.basictype);
|
||
|
if( size == 1 )
|
||
|
{
|
||
|
/*
|
||
|
* Special handling for character arrays.
|
||
|
*/
|
||
|
pnt = (char *) addr->off;
|
||
|
fprintf(stderr, "\"");
|
||
|
for( i=addr->type->un.array.start; i < addr->type->un.array.end; i++ )
|
||
|
{
|
||
|
fputc(*pnt++, stderr);
|
||
|
}
|
||
|
fprintf(stderr, "\"");
|
||
|
break;
|
||
|
}
|
||
|
addr1 = *addr;
|
||
|
addr1.type = addr->type->un.array.basictype;
|
||
|
fprintf(stderr, "{");
|
||
|
for( i=addr->type->un.array.start; i <= addr->type->un.array.end; i++ )
|
||
|
{
|
||
|
DEBUG_Print(&addr1, 1, format, level + 1);
|
||
|
addr1.off += size;
|
||
|
if( i == addr->type->un.array.end )
|
||
|
{
|
||
|
fprintf(stderr, "}");
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
fprintf(stderr, ", ");
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
assert(FALSE);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if( level == 0 )
|
||
|
{
|
||
|
fprintf(stderr, "\n");
|
||
|
}
|
||
|
}
|