Mercurial > pub > dyncall > dyncall
view dynload/dynload_syms_pe.c @ 472:e5820b7a3fbc
doc:
- some more plan 9 disas examples
- x86 callconv doc updated:
* mainly info about aggregate passing and returning
* removing section about pascal calling convention, as dyncall doesn't support 16bit abis
- some cleanups
author | Tassilo Philipp |
---|---|
date | Thu, 10 Feb 2022 17:32:05 +0100 |
parents | 2d9f1cb06352 |
children |
line wrap: on
line source
/* Package: dyncall Library: dynload File: dynload/dynload_syms_pe.c Description: License: Copyright (c) 2007-2018 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> Olivier Chafik <olivier.chafik@gmail.com> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "dynload.h" #include "dynload_alloc.h" #include <windows.h> struct DLSyms_ { DLLib* pLib; const char* pBase; const DWORD* pNames; const DWORD* pFuncs; const unsigned short* pOrds; size_t count; }; DLSyms* dlSymsInit(const char* libPath) { DLLib* pLib; DLSyms* pSyms; IMAGE_DOS_HEADER* pDOSHeader; IMAGE_NT_HEADERS* pNTHeader; IMAGE_DATA_DIRECTORY* pExportsDataDir; IMAGE_EXPORT_DIRECTORY* pExports; const char* base; pLib = dlLoadLibrary(libPath); if(!pLib) return NULL; base = (const char*)pLib; pDOSHeader = (IMAGE_DOS_HEADER*)base; pNTHeader = (IMAGE_NT_HEADERS*)(base + pDOSHeader->e_lfanew); /* optional header present and big enough? this header should exist as it's only optional for object files */ if(pNTHeader->FileHeader.SizeOfOptionalHeader < ((char*)&pNTHeader->OptionalHeader.DataDirectory - (char*)&pNTHeader->OptionalHeader)) return NULL; /* export table available? */ if(pNTHeader->OptionalHeader.NumberOfRvaAndSizes <= IMAGE_DIRECTORY_ENTRY_EXPORT) return NULL; pExportsDataDir = &pNTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT]; if(!pExportsDataDir->VirtualAddress) return NULL; pExports = (IMAGE_EXPORT_DIRECTORY*)(base + pExportsDataDir->VirtualAddress); pSyms = (DLSyms*)dlAllocMem(sizeof(DLSyms)); pSyms->pBase = base; pSyms->pNames = (DWORD*)(base + pExports->AddressOfNames); pSyms->pFuncs = (DWORD*)(base + pExports->AddressOfFunctions); pSyms->pOrds = (unsigned short*)(base + pExports->AddressOfNameOrdinals); pSyms->count = (size_t)pExports->NumberOfNames; pSyms->pLib = pLib; return pSyms; } void dlSymsCleanup(DLSyms* pSyms) { if(pSyms) { dlFreeLibrary(pSyms->pLib); dlFreeMem(pSyms); } } int dlSymsCount(DLSyms* pSyms) { return pSyms ? (int)pSyms->count : 0; } const char* dlSymsName(DLSyms* pSyms, int index) { if(!pSyms || index < 0 || index >= pSyms->count) return NULL; return pSyms->pBase + pSyms->pNames[index]; } const char* dlSymsNameFromValue(DLSyms* pSyms, void* value) { int i, c=dlSymsCount(pSyms); for(i=0; i<c; ++i) { if((void*)(pSyms->pBase + pSyms->pFuncs[pSyms->pOrds[i]]) == value) return dlSymsName(pSyms, i); } /* Not found. */ return NULL; }