Mercurial > pub > dyncall > dyncall
view dynload/dynload_darwin.c @ 166:d5705f226298
- added portasm support for adding .section .note.GNU-stack "hints" marking generated .o files from assembly files as not needing an executable stack
* needed to be done manually in assembly files, in contrast to C translation units where gcc adds such hints automatically
* this is for security, and better/easier integration of dyncall into other projects and builds, as dyncall doesn't need an executable stack
* thanks to Thorsten Behrens for bringing this up to our intention and providing a first analysis
* currently only done on Linux, but will be added across other platforms (where applicable) after some testing
author | cslag |
---|---|
date | Thu, 05 Jan 2017 11:07:29 +0100 |
parents | 3e629dc19168 |
children |
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/* Package: dyncall Library: dynload File: dynload/dynload_darwin.c Description: dynload module for .dylib (mach-o darwin/OS X) files License: Copyright (c) 2007-2015 Olivier Chafik <olivier.chafik@gmail.com> Minor bug-fix modifications by Daniel Adler. 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. */ /* dynload_darwin.c dynload module for .dylib (mach-o darwin/OS X) files */ #include "dynload.h" #include "dynload_alloc.h" #include <dlfcn.h> #include <string.h> struct DLLib_ { char* libPath; void* handle; }; DLLib* dlLoadLibrary(const char* libPath) { void* handle; size_t len; DLLib* lib; handle = dlopen(libPath, RTLD_LAZY); if (!handle) return NULL; lib = (DLLib*)dlAllocMem(sizeof(DLLib)); lib->handle = handle; /* libPath might be null (self reference on image) [Daniel] */ if (libPath != NULL) { len = strlen(libPath); lib->libPath = (char*)dlAllocMem(len + 1); strcpy(lib->libPath, libPath); lib->libPath[len] = '\0'; } else { lib->libPath = NULL; } return lib; } void* dlFindSymbol(DLLib* libHandle, const char* symbol) { return dlsym(libHandle && libHandle->handle ? libHandle->handle : RTLD_DEFAULT, symbol); } void dlFreeLibrary(DLLib* libHandle) { if (!libHandle) return; dlclose(libHandle->handle); if (libHandle->libPath) dlFreeMem(libHandle->libPath); dlFreeMem(libHandle); }