PIMAGE_SECTION_HEADER
_FindPESectionByName (const char *pName)
{
PBYTE pImageBase;
PIMAGE_NT_HEADERS pNTHeader;
PIMAGE_SECTION_HEADER pSection;
unsigned int iSection;
/* Long names aren't supported. */
if (strlen (pName) > IMAGE_SIZEOF_SHORT_NAME)
return NULL;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return NULL;
pNTHeader = (PIMAGE_NT_HEADERS) (pImageBase + ((PIMAGE_DOS_HEADER) pImageBase)->e_lfanew);
for (iSection = 0, pSection = IMAGE_FIRST_SECTION (pNTHeader);
iSection < pNTHeader->FileHeader.NumberOfSections;
++iSection,++pSection)
{
if (!strncmp ((char *) &pSection->Name[0], pName, IMAGE_SIZEOF_SHORT_NAME))
return pSection;
}
return NULL;
}
PIMAGE_SECTION_HEADER
_FindPESectionExec (size_t eNo)
{
PBYTE pImageBase;
PIMAGE_NT_HEADERS pNTHeader;
PIMAGE_SECTION_HEADER pSection;
unsigned int iSection;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return NULL;
pNTHeader = (PIMAGE_NT_HEADERS) (pImageBase + ((PIMAGE_DOS_HEADER) pImageBase)->e_lfanew);
for (iSection = 0, pSection = IMAGE_FIRST_SECTION (pNTHeader);
iSection < pNTHeader->FileHeader.NumberOfSections;
++iSection,++pSection)
{
if ((pSection->Characteristics & IMAGE_SCN_MEM_EXECUTE) != 0)
{
if (!eNo)
return pSection;
--eNo;
}
}
return NULL;
}
PBYTE
_GetPEImageBase (void)
{
PBYTE pImageBase;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return NULL;
return pImageBase;
}
PIMAGE_SECTION_HEADER
__mingw_GetSectionForAddress (LPVOID p)
{
PBYTE pImageBase;
DWORD_PTR rva;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return NULL;
rva = (DWORD_PTR) (((PBYTE) p) - pImageBase);
return _FindPESection (pImageBase, rva);
}
int
__mingw_GetSectionCount (void)
{
PBYTE pImageBase;
PIMAGE_NT_HEADERS pNTHeader;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return 0;
pNTHeader = (PIMAGE_NT_HEADERS) (pImageBase + ((PIMAGE_DOS_HEADER) pImageBase)->e_lfanew);
return (int) pNTHeader->FileHeader.NumberOfSections;
}
WINBOOL
_IsNonwritableInCurrentImage (PBYTE pTarget)
{
PBYTE pImageBase;
DWORD_PTR rvaTarget;
PIMAGE_SECTION_HEADER pSection;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return FALSE;
rvaTarget = pTarget - pImageBase;
pSection = _FindPESection (pImageBase, rvaTarget);
if (pSection == NULL)
return FALSE;
return (pSection->Characteristics & IMAGE_SCN_MEM_WRITE) == 0;
}
const char *
__mingw_enum_import_library_names (int i)
{
PBYTE pImageBase;
PIMAGE_NT_HEADERS pNTHeader;
PIMAGE_IMPORT_DESCRIPTOR importDesc;
PIMAGE_SECTION_HEADER pSection;
DWORD importsStartRVA;
pImageBase = (PBYTE) &__ImageBase;
if (! _ValidateImageBase (pImageBase))
return NULL;
pNTHeader = (PIMAGE_NT_HEADERS) (pImageBase + ((PIMAGE_DOS_HEADER) pImageBase)->e_lfanew);
importsStartRVA = pNTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
if (!importsStartRVA)
return NULL;
pSection = _FindPESection (pImageBase, importsStartRVA);
if (!pSection)
return NULL;
importDesc = (PIMAGE_IMPORT_DESCRIPTOR) (pImageBase + importsStartRVA);
if (!importDesc)
return NULL;
for (;;)
{
if (importDesc->TimeDateStamp == 0 && importDesc->Name == 0)
break;
if (i <= 0)
return (char *) (pImageBase + importDesc->Name);
--i;
importDesc++;
}
return NULL;
}
