ReactOS  0.4.15-dev-1397-g19779b3
find.c File Reference
#include <ntdef.h>
#include <reactos/rossym.h>
#include "rossympriv.h"
#include <debug.h>
Include dependency graph for find.c:

Go to the source code of this file.

Macros

#define NDEBUG
 

Functions

static PROSSYM_ENTRY FindEntry (IN PROSSYM_INFO RosSymInfo, IN ULONG_PTR RelativeAddress)
 
BOOLEAN RosSymGetAddressInformation (PROSSYM_INFO RosSymInfo, ULONG_PTR RelativeAddress, ULONG *LineNumber, char *FileName, char *FunctionName)
 

Macro Definition Documentation

◆ NDEBUG

#define NDEBUG

Definition at line 42 of file find.c.

Function Documentation

◆ FindEntry()

static PROSSYM_ENTRY FindEntry ( IN PROSSYM_INFO  RosSymInfo,
IN ULONG_PTR  RelativeAddress 
)
static

Definition at line 46 of file find.c.

47 {
48  /*
49  * Perform a binary search.
50  *
51  * The code below is a bit sneaky. After a comparison fails, we
52  * divide the work in half by moving either left or right. If lim
53  * is odd, moving left simply involves halving lim: e.g., when lim
54  * is 5 we look at item 2, so we change lim to 2 so that we will
55  * look at items 0 & 1. If lim is even, the same applies. If lim
56  * is odd, moving right again involes halving lim, this time moving
57  * the base up one item past p: e.g., when lim is 5 we change base
58  * to item 3 and make lim 2 so that we will look at items 3 and 4.
59  * If lim is even, however, we have to shrink it by one before
60  * halving: e.g., when lim is 4, we still looked at item 2, so we
61  * have to make lim 3, then halve, obtaining 1, so that we will only
62  * look at item 3.
63  */
64  PROSSYM_ENTRY Base = RosSymInfo->Symbols;
65  ULONG Lim;
66  PROSSYM_ENTRY Mid, Low;
67 
68  if (RelativeAddress < Base->Address)
69  {
70  return NULL;
71  }
72 
73  Low = Base;
74  for (Lim = RosSymInfo->SymbolsCount; Lim != 0; Lim >>= 1)
75  {
76  Mid = Base + (Lim >> 1);
77  if (RelativeAddress == Mid->Address)
78  {
79  return Mid;
80  }
81  if (Mid->Address < RelativeAddress) /* key > mid: move right */
82  {
83  Low = Mid;
84  Base = Mid + 1;
85  Lim--;
86  } /* else move left */
87  }
88 
89  return Low;
90 }
_In_opt_ ULONG Base
Definition: rtlfuncs.h:2373
Definition: strmini.h:380
Definition: rossym.h:26
static WCHAR Address[46]
Definition: ping.c:68
#define NULL
Definition: types.h:112
unsigned int ULONG
Definition: retypes.h:1
ULONG_PTR Address
Definition: rossym.h:27

Referenced by RosSymGetAddressInformation().

◆ RosSymGetAddressInformation()

BOOLEAN RosSymGetAddressInformation ( PROSSYM_INFO  RosSymInfo,
ULONG_PTR  RelativeAddress,
ULONG LineNumber,
char FileName,
char FunctionName 
)

Definition at line 94 of file find.c.

99 {
100  PROSSYM_ENTRY RosSymEntry;
101 
102  DPRINT("RelativeAddress = 0x%08x\n", RelativeAddress);
103 
104  if (RosSymInfo->Symbols == NULL || RosSymInfo->SymbolsCount == 0 ||
105  RosSymInfo->Strings == NULL || RosSymInfo->StringsLength == 0)
106  {
107  DPRINT1("Uninitialized RosSymInfo\n");
108  return FALSE;
109  }
110 
112 
113  /* find symbol entry for function */
114  RosSymEntry = FindEntry(RosSymInfo, RelativeAddress);
115 
116  if (NULL == RosSymEntry)
117  {
118  DPRINT("None of the requested information was found!\n");
119  return FALSE;
120  }
121 
122  if (LineNumber != NULL)
123  {
124  *LineNumber = RosSymEntry->SourceLine;
125  }
126  if (FileName != NULL)
127  {
128  PCSTR Name = "";
129  if (RosSymEntry->FileOffset != 0)
130  {
131  Name = (PCHAR) RosSymInfo->Strings + RosSymEntry->FileOffset;
132  }
133  strcpy(FileName, Name);
134  }
135  if (FunctionName != NULL)
136  {
137  PCSTR Name = "";
138  if (RosSymEntry->FunctionOffset != 0)
139  {
140  Name = (PCHAR) RosSymInfo->Strings + RosSymEntry->FunctionOffset;
141  }
143  }
144 
145  return TRUE;
146 }
ULONG SourceLine
Definition: rossym.h:30
#define TRUE
Definition: types.h:120
Definition: rossym.h:26
ULONG FileOffset
Definition: rossym.h:29
#define FALSE
Definition: types.h:117
void DPRINT(...)
Definition: polytest.cpp:61
PCHAR Strings
Definition: rossympriv.h:15
#define PCHAR
Definition: match.c:90
static PROSSYM_ENTRY FindEntry(IN PROSSYM_INFO RosSymInfo, IN ULONG_PTR RelativeAddress)
Definition: find.c:46
#define ASSERT(a)
Definition: mode.c:45
ULONG StringsLength
Definition: rossympriv.h:16
ACPI_BUFFER *RetBuffer ACPI_BUFFER *RetBuffer char ACPI_WALK_RESOURCE_CALLBACK void *Context ACPI_BUFFER *RetBuffer UINT16 ACPI_RESOURCE **ResourcePtr ACPI_GENERIC_ADDRESS *Reg UINT32 *ReturnValue UINT8 UINT8 *Slp_TypB ACPI_PHYSICAL_ADDRESS PhysicalAddress64 UINT32 UINT32 *TimeElapsed UINT32 LineNumber
Definition: acpixf.h:1216
#define NULL
Definition: types.h:112
#define DPRINT1
Definition: precomp.h:8
ACPI_BUFFER *RetBuffer ACPI_BUFFER *RetBuffer char ACPI_WALK_RESOURCE_CALLBACK void *Context ACPI_BUFFER *RetBuffer UINT16 ACPI_RESOURCE **ResourcePtr ACPI_GENERIC_ADDRESS *Reg UINT32 *ReturnValue UINT8 UINT8 *Slp_TypB ACPI_PHYSICAL_ADDRESS PhysicalAddress64 UINT32 UINT32 *TimeElapsed UINT32 ACPI_STATUS const char UINT32 ACPI_STATUS const char UINT32 const char * FunctionName
Definition: acpixf.h:1274
char * strcpy(char *DstString, const char *SrcString)
Definition: utclib.c:388
ULONG SymbolsCount
Definition: rossympriv.h:14
const char * PCSTR
Definition: typedefs.h:52
ULONG FunctionOffset
Definition: rossym.h:28
PROSSYM_ENTRY Symbols
Definition: rossympriv.h:13

Referenced by KdbSymGetAddressInformation().