diff options
Diffstat (limited to 'winsup/cygwin/lib')
| -rw-r--r-- | winsup/cygwin/lib/_cygwin_crt0_common.cc | 156 | ||||
| -rw-r--r-- | winsup/cygwin/lib/crt0.h | 23 | ||||
| -rw-r--r-- | winsup/cygwin/lib/cygwin_attach_dll.c | 27 | ||||
| -rw-r--r-- | winsup/cygwin/lib/cygwin_crt0.c | 23 | ||||
| -rw-r--r-- | winsup/cygwin/lib/dll_entry.c | 17 | ||||
| -rw-r--r-- | winsup/cygwin/lib/dll_main.cc | 38 | ||||
| -rw-r--r-- | winsup/cygwin/lib/libcmain.c | 43 | ||||
| -rw-r--r-- | winsup/cygwin/lib/premain0.c | 14 | ||||
| -rw-r--r-- | winsup/cygwin/lib/premain1.c | 14 | ||||
| -rw-r--r-- | winsup/cygwin/lib/premain2.c | 14 | ||||
| -rw-r--r-- | winsup/cygwin/lib/premain3.c | 14 | ||||
| -rw-r--r-- | winsup/cygwin/lib/pseudo-reloc.c | 367 |
12 files changed, 0 insertions, 750 deletions
diff --git a/winsup/cygwin/lib/_cygwin_crt0_common.cc b/winsup/cygwin/lib/_cygwin_crt0_common.cc deleted file mode 100644 index 173f85268..000000000 --- a/winsup/cygwin/lib/_cygwin_crt0_common.cc +++ /dev/null @@ -1,156 +0,0 @@ -/* _cygwin_crt0_common.cc: common crt0 function for cygwin crt0's. - - Copyright 2000, 2001, 2002, 2003, 2004, 2009 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include "crt0.h" -#include "cygwin-cxx.h" - -/* Weaken these declarations so the references don't pull in C++ dependencies - unnecessarily. */ -#define WEAK __attribute__ ((weak)) - -/* Use asm names to bypass the --wrap that is being applied to redirect all other - references to these operators toward the redirectors in the Cygwin DLL; this - way we can record what definitions were visible at final link time but still - send all calls to the redirectors. */ -extern WEAK void *operator new(std::size_t sz) throw (std::bad_alloc) - __asm__ ("___real__Znwj"); -extern WEAK void *operator new[](std::size_t sz) throw (std::bad_alloc) - __asm__ ("___real__Znaj"); -extern WEAK void operator delete(void *p) throw() - __asm__ ("___real__ZdlPv "); -extern WEAK void operator delete[](void *p) throw() - __asm__ ("___real__ZdaPv"); -extern WEAK void *operator new(std::size_t sz, const std::nothrow_t &nt) throw() - __asm__ ("___real__ZnwjRKSt9nothrow_t"); -extern WEAK void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw() - __asm__ ("___real__ZnajRKSt9nothrow_t"); -extern WEAK void operator delete(void *p, const std::nothrow_t &nt) throw() - __asm__ ("___real__ZdlPvRKSt9nothrow_t"); -extern WEAK void operator delete[](void *p, const std::nothrow_t &nt) throw() - __asm__ ("___real__ZdaPvRKSt9nothrow_t"); - -/* Avoid an info message from linker when linking applications. */ -extern __declspec(dllimport) struct _reent *_impure_ptr; - -/* Initialised in _cygwin_dll_entry. */ -extern int __dynamically_loaded; - -#undef environ - -extern "C" -{ -char **environ; -int cygwin_attach_dll (HMODULE, MainFunc); -int cygwin_attach_noncygwin_dll (HMODULE, MainFunc); -int main (int, char **, char **); -int _fmode; -void _pei386_runtime_relocator (); - -struct per_process_cxx_malloc __cygwin_cxx_malloc = -{ - &(operator new), &(operator new[]), - &(operator delete), &(operator delete[]), - &(operator new), &(operator new[]), - &(operator delete), &(operator delete[]) -}; - -/* Set up pointers to various pieces so the dll can then use them, - and then jump to the dll. */ - -int __stdcall -_cygwin_crt0_common (MainFunc f, per_process *u) -{ - per_process *newu = (per_process *) cygwin_internal (CW_USER_DATA); - bool uwasnull; - - /* u is non-NULL if we are in a DLL, and NULL in the main exe. - newu is the Cygwin DLL's internal per_process and never NULL. */ - if (u != NULL) - uwasnull = false; /* Caller allocated space for per_process structure. */ - else - { - u = newu; /* Using DLL built-in per_process. */ - uwasnull = true; /* Remember for later. */ - } - - /* The version numbers are the main source of compatibility checking. - As a backup to them, we use the size of the per_process struct. */ - u->magic_biscuit = sizeof (per_process); - - /* cygwin.dll version number in effect at the time the app was created. */ - u->dll_major = CYGWIN_VERSION_DLL_MAJOR; - u->dll_minor = CYGWIN_VERSION_DLL_MINOR; - u->api_major = CYGWIN_VERSION_API_MAJOR; - u->api_minor = CYGWIN_VERSION_API_MINOR; - - u->ctors = &__CTOR_LIST__; - u->dtors = &__DTOR_LIST__; - u->envptr = &environ; - if (uwasnull) - _impure_ptr = u->impure_ptr; /* Use field initialized in newer DLLs. */ - else - u->impure_ptr_ptr = &_impure_ptr; /* Older DLLs need this. */ - - u->main = f; - - /* These functions are executed prior to main. They are just stubs unless the - user overrides them. */ - u->premain[0] = cygwin_premain0; - u->premain[1] = cygwin_premain1; - u->premain[2] = cygwin_premain2; - u->premain[3] = cygwin_premain3; - u->fmode_ptr = &_fmode; - - /* This is used to record what the initial sp was. The value is needed - when copying the parent's stack to the child during a fork. */ - u->initial_sp = (char *) __builtin_frame_address (1); - - /* Remember whatever the user linked his application with - or - point to entries in the dll. */ - u->malloc = &malloc; - u->free = &free; - u->realloc = &realloc; - u->calloc = &calloc; - - /* Likewise for the C++ memory operators, if any, but not if we - were dlopen()'d, as we might get dlclose()'d and that would - leave stale function pointers behind. */ - if (newu && newu->cxx_malloc && !__dynamically_loaded) - { - /* Inherit what we don't override. */ -#define CONDITIONALLY_OVERRIDE(MEMBER) \ - if (!__cygwin_cxx_malloc.MEMBER) \ - __cygwin_cxx_malloc.MEMBER = newu->cxx_malloc->MEMBER; - CONDITIONALLY_OVERRIDE(oper_new); - CONDITIONALLY_OVERRIDE(oper_new__); - CONDITIONALLY_OVERRIDE(oper_delete); - CONDITIONALLY_OVERRIDE(oper_delete__); - CONDITIONALLY_OVERRIDE(oper_new_nt); - CONDITIONALLY_OVERRIDE(oper_new___nt); - CONDITIONALLY_OVERRIDE(oper_delete_nt); - CONDITIONALLY_OVERRIDE(oper_delete___nt); - /* Now update the resulting set into the global redirectors. */ - *newu->cxx_malloc = __cygwin_cxx_malloc; - } - - /* Setup the module handle so fork can get the path name. */ - u->hmodule = GetModuleHandle (0); - - /* variables for fork */ - u->data_start = &_data_start__; - u->data_end = &_data_end__; - u->bss_start = &_bss_start__; - u->bss_end = &_bss_end__; - - _pei386_runtime_relocator (); - return 1; -} -} /* "C" */ diff --git a/winsup/cygwin/lib/crt0.h b/winsup/cygwin/lib/crt0.h deleted file mode 100644 index 461ea9b2e..000000000 --- a/winsup/cygwin/lib/crt0.h +++ /dev/null @@ -1,23 +0,0 @@ -/* crt0.h: header file for crt0. - - Copyright 2000, 2001, 2008 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#ifdef __cplusplus -extern "C" { -#endif - -#include <windows.h> -struct per_process; -typedef int (*MainFunc) (int argc, char *argv[], char **env); -int __stdcall _cygwin_crt0_common (MainFunc, struct per_process *); -int dll_dllcrt0 (HMODULE, struct per_process *); - -#ifdef __cplusplus -} -#endif diff --git a/winsup/cygwin/lib/cygwin_attach_dll.c b/winsup/cygwin/lib/cygwin_attach_dll.c deleted file mode 100644 index 49bb9256d..000000000 --- a/winsup/cygwin/lib/cygwin_attach_dll.c +++ /dev/null @@ -1,27 +0,0 @@ -/* attach_dll.cc: crt0 for attaching cygwin DLL from a non-cygwin app. - - Copyright 2000, 2001 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#undef __INSIDE_CYGWIN__ -#include <windows.h> -#include <time.h> /* Needed since call to sys/time.h via sys/cygwin.h - complains otherwise */ -#include <sys/cygwin.h> -#include "crt0.h" - -/* for a loaded dll */ -int -cygwin_attach_dll (HMODULE h, MainFunc f) -{ - static struct per_process u; - (void) _cygwin_crt0_common (f, &u); - - /* jump into the dll. */ - return dll_dllcrt0 (h, &u); -} diff --git a/winsup/cygwin/lib/cygwin_crt0.c b/winsup/cygwin/lib/cygwin_crt0.c deleted file mode 100644 index a3aa07773..000000000 --- a/winsup/cygwin/lib/cygwin_crt0.c +++ /dev/null @@ -1,23 +0,0 @@ -/* cygwin_crt0.cc: crt0 for cygwin - - Copyright 2000, 2001, 2008, 2009 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#undef __INSIDE_CYGWIN__ -#include "crt0.h" - -extern void __stdcall _dll_crt0 () - __declspec (dllimport) __attribute ((noreturn)); - -/* for main module */ -void -cygwin_crt0 (MainFunc f) -{ - _cygwin_crt0_common (f, NULL); - _dll_crt0 (); /* Jump into the dll, never to return */ -} diff --git a/winsup/cygwin/lib/dll_entry.c b/winsup/cygwin/lib/dll_entry.c deleted file mode 100644 index 781f6a3ea..000000000 --- a/winsup/cygwin/lib/dll_entry.c +++ /dev/null @@ -1,17 +0,0 @@ -/* dll_entry.cc: Provide the default user DLL linker entry point. - - Copyright 1998, 2000, 2001 Red Hat, Inc. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -/* Here we simply instantiate the DECLARE_CYGWIN_DLL to define the - linker entry point, __cygwin_dll_entry@12, which in turn calls - _DllMain@12 to do user-specific initialization, if any. There is a - default DllMain stub in the library if there is no user supplied - one. */ - -#include "cygwin/cygwin_dll.h" - -DECLARE_CYGWIN_DLL (DllMain); diff --git a/winsup/cygwin/lib/dll_main.cc b/winsup/cygwin/lib/dll_main.cc deleted file mode 100644 index 7f977f689..000000000 --- a/winsup/cygwin/lib/dll_main.cc +++ /dev/null @@ -1,38 +0,0 @@ -/* dll_main.cc: Provide the DllMain stub that the user can override. - - Copyright 1998, 2000, 2001, 2009 Red Hat, Inc. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - - -#define WIN32_LEAN_AND_MEAN -#include <windows.h> - -extern "C" -BOOL APIENTRY DllMain (HINSTANCE hInst, DWORD reason, - LPVOID reserved /* Not used. */); - -BOOL APIENTRY -DllMain ( - HINSTANCE hInst /* Library instance handle. */ , - DWORD reason /* Reason this function is being called. */ , - LPVOID reserved /* Not used. */) -{ - switch (reason) - { - case DLL_PROCESS_ATTACH: - break; - - case DLL_PROCESS_DETACH: - break; - - case DLL_THREAD_ATTACH: - break; - - case DLL_THREAD_DETACH: - break; - } - return TRUE; -} diff --git a/winsup/cygwin/lib/libcmain.c b/winsup/cygwin/lib/libcmain.c deleted file mode 100644 index d1faba1b3..000000000 --- a/winsup/cygwin/lib/libcmain.c +++ /dev/null @@ -1,43 +0,0 @@ -/* libcmain.c - - Copyright 1996, 1997, 1998, 2000, 2001, 2006, 2009 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include <windows.h> - -#define SP " \t\n" - -/* Allow apps which don't have a main to work, as long as they define WinMain */ -int -main () -{ - HMODULE x = GetModuleHandle (0); - char *s = GetCommandLine (); - STARTUPINFO si; - char *nexts; - - s += strspn (s, SP); - - if (*s != '"') - nexts = strpbrk (s, SP); - else - while ((nexts = strchr (s + 1, '"')) != NULL && nexts[-1] == '\\') - s = nexts; - - if (!nexts) - nexts = strchr (s, '\0'); - else - nexts += strspn (nexts + 1, SP); - - GetStartupInfo (&si); - - return WinMain (x, 0, nexts, - ((si.dwFlags & STARTF_USESHOWWINDOW) != 0 - ? si.wShowWindow - : SW_SHOWNORMAL)); -} diff --git a/winsup/cygwin/lib/premain0.c b/winsup/cygwin/lib/premain0.c deleted file mode 100644 index b77e02e8e..000000000 --- a/winsup/cygwin/lib/premain0.c +++ /dev/null @@ -1,14 +0,0 @@ -/* premain0.c - - Copyright 2000 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -void -cygwin_premain0(int argc, char **argv) -{ -} diff --git a/winsup/cygwin/lib/premain1.c b/winsup/cygwin/lib/premain1.c deleted file mode 100644 index 99aeac916..000000000 --- a/winsup/cygwin/lib/premain1.c +++ /dev/null @@ -1,14 +0,0 @@ -/* premain1.c - - Copyright 2000 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -void -cygwin_premain1(int argc, char **argv) -{ -} diff --git a/winsup/cygwin/lib/premain2.c b/winsup/cygwin/lib/premain2.c deleted file mode 100644 index a89e76ec3..000000000 --- a/winsup/cygwin/lib/premain2.c +++ /dev/null @@ -1,14 +0,0 @@ -/* premain2.c - - Copyright 2000 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -void -cygwin_premain2(int argc, char **argv) -{ -} diff --git a/winsup/cygwin/lib/premain3.c b/winsup/cygwin/lib/premain3.c deleted file mode 100644 index c5b99b918..000000000 --- a/winsup/cygwin/lib/premain3.c +++ /dev/null @@ -1,14 +0,0 @@ -/* premain3.c - - Copyright 2000 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -void -cygwin_premain3(int argc, char **argv) -{ -} diff --git a/winsup/cygwin/lib/pseudo-reloc.c b/winsup/cygwin/lib/pseudo-reloc.c deleted file mode 100644 index 77f041114..000000000 --- a/winsup/cygwin/lib/pseudo-reloc.c +++ /dev/null @@ -1,367 +0,0 @@ -/* pseudo-reloc.c - - Contributed by Egor Duda <deo@logos-m.ru> - Modified by addition of runtime_pseudo_reloc version 2 - by Kai Tietz <kai.tietz@onevision.com> - - THIS SOFTWARE IS NOT COPYRIGHTED - - This source code is offered for use in the public domain. You may - use, modify or distribute it freely. - - This code is distributed in the hope that it will be useful but - WITHOUT ANY WARRANTY. ALL WARRENTIES, EXPRESS OR IMPLIED ARE HEREBY - DISCLAMED. This includes but is not limited to warrenties of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -*/ - -#include <windows.h> -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <memory.h> - -#if defined(__CYGWIN__) -#include <wchar.h> -#include <ntdef.h> -#include <sys/cygwin.h> -/* copied from winsup.h */ -# define NO_COPY __attribute__((nocommon)) __attribute__((section(".data_cygwin_nocopy"))) -/* custom status code: */ -#define STATUS_ILLEGAL_DLL_PSEUDO_RELOCATION ((NTSTATUS) 0xe0000269) -#define SHORT_MSG_BUF_SZ 128 -#else -# define NO_COPY -#endif - -#ifdef __GNUC__ -#define ATTRIBUTE_NORETURN __attribute__ ((noreturn)) -#else -#define ATTRIBUTE_NORETURN -#endif - -#ifndef __MINGW_LSYMBOL -#define __MINGW_LSYMBOL(sym) sym -#endif - -extern char __RUNTIME_PSEUDO_RELOC_LIST__; -extern char __RUNTIME_PSEUDO_RELOC_LIST_END__; -extern char __MINGW_LSYMBOL(_image_base__); - -void _pei386_runtime_relocator (void); - -/* v1 relocation is basically: - * *(base + .target) += .addend - * where (base + .target) is always assumed to point - * to a DWORD (4 bytes). - */ -typedef struct { - DWORD addend; - DWORD target; -} runtime_pseudo_reloc_item_v1; - -/* v2 relocation is more complex. In effect, it is - * *(base + .target) += *(base + .sym) - (base + .sym) - * with care taken in both reading, sign extension, and writing - * because .flags may indicate that (base + .target) may point - * to a BYTE, WORD, DWORD, or QWORD (w64). - */ -typedef struct { - DWORD sym; - DWORD target; - DWORD flags; -} runtime_pseudo_reloc_item_v2; - -typedef struct { - DWORD magic1; - DWORD magic2; - DWORD version; -} runtime_pseudo_reloc_v2; - -static void ATTRIBUTE_NORETURN -__report_error (const char *msg, ...) -{ -#ifdef __CYGWIN__ - /* This function is used to print short error messages - * to stderr, which may occur during DLL initialization - * while fixing up 'pseudo' relocations. This early, we - * may not be able to use cygwin stdio functions, so we - * use the win32 WriteFile api. This should work with both - * normal win32 console IO handles, redirected ones, and - * cygwin ptys. - */ - char buf[SHORT_MSG_BUF_SZ]; - wchar_t module[MAX_PATH]; - char * posix_module = NULL; - static const char UNKNOWN_MODULE[] = "<unknown module>: "; - static const size_t UNKNOWN_MODULE_LEN = sizeof (UNKNOWN_MODULE) - 1; - static const char CYGWIN_FAILURE_MSG[] = "Cygwin runtime failure: "; - static const size_t CYGWIN_FAILURE_MSG_LEN = sizeof (CYGWIN_FAILURE_MSG) - 1; - DWORD len; - DWORD done; - va_list args; - HANDLE errh = GetStdHandle (STD_ERROR_HANDLE); - ssize_t modulelen = GetModuleFileNameW (NULL, module, sizeof (module)); - - if (errh == INVALID_HANDLE_VALUE) - cygwin_internal (CW_EXIT_PROCESS, - STATUS_ILLEGAL_DLL_PSEUDO_RELOCATION, - 1); - - if (modulelen > 0) - posix_module = cygwin_create_path (CCP_WIN_W_TO_POSIX, module); - - va_start (args, msg); - len = (DWORD) vsnprintf (buf, SHORT_MSG_BUF_SZ, msg, args); - va_end (args); - buf[SHORT_MSG_BUF_SZ-1] = '\0'; /* paranoia */ - - if (posix_module) - { - WriteFile (errh, (PCVOID)CYGWIN_FAILURE_MSG, - CYGWIN_FAILURE_MSG_LEN, &done, NULL); - WriteFile (errh, (PCVOID)posix_module, - strlen(posix_module), &done, NULL); - WriteFile (errh, (PCVOID)": ", 2, &done, NULL); - WriteFile (errh, (PCVOID)buf, len, &done, NULL); - free (posix_module); - } - else - { - WriteFile (errh, (PCVOID)CYGWIN_FAILURE_MSG, - CYGWIN_FAILURE_MSG_LEN, &done, NULL); - WriteFile (errh, (PCVOID)UNKNOWN_MODULE, - UNKNOWN_MODULE_LEN, &done, NULL); - WriteFile (errh, (PCVOID)buf, len, &done, NULL); - } - WriteFile (errh, (PCVOID)"\n", 1, &done, NULL); - - cygwin_internal (CW_EXIT_PROCESS, - STATUS_ILLEGAL_DLL_PSEUDO_RELOCATION, - 1); - /* not reached, but silences noreturn warning */ - abort (); -#else - va_list argp; - va_start (argp, msg); -# ifdef __MINGW64_VERSION_MAJOR - fprintf (stderr, "Mingw-w64 runtime failure:\n"); -# else - fprintf (stderr, "Mingw runtime failure:\n"); -# endif - vfprintf (stderr, msg, argp); - va_end (argp); - abort (); -#endif -} - -/* This function temporarily marks the page containing addr - * writable, before copying len bytes from *src to *addr, and - * then restores the original protection settings to the page. - * - * Using this function eliminates the requirement with older - * pseudo-reloc implementations, that sections containing - * pseudo-relocs (such as .text and .rdata) be permanently - * marked writable. This older behavior sabotaged any memory - * savings achieved by shared libraries on win32 -- and was - * slower, too. However, on cygwin as of binutils 2.20 the - * .text section is still marked writable, and the .rdata section - * is folded into the (writable) .data when --enable-auto-import. - */ -static void -__write_memory (void *addr, const void *src, size_t len) -{ - MEMORY_BASIC_INFORMATION b; - DWORD oldprot; - - if (!len) - return; - - if (!VirtualQuery (addr, &b, sizeof(b))) - { - __report_error (" VirtualQuery failed for %d bytes at address %p", - (int) sizeof(b), addr); - } - - /* Temporarily allow write access to read-only protected memory. */ - if (b.Protect != PAGE_EXECUTE_READWRITE && b.Protect != PAGE_READWRITE) - VirtualProtect (b.BaseAddress, b.RegionSize, PAGE_EXECUTE_READWRITE, - &oldprot); - /* write the data. */ - memcpy (addr, src, len); - /* Restore original protection. */ - if (b.Protect != PAGE_EXECUTE_READWRITE && b.Protect != PAGE_READWRITE) - VirtualProtect (b.BaseAddress, b.RegionSize, oldprot, &oldprot); -} - -#define RP_VERSION_V1 0 -#define RP_VERSION_V2 1 - -static void -do_pseudo_reloc (void * start, void * end, void * base) -{ - ptrdiff_t addr_imp, reldata; - ptrdiff_t reloc_target = (ptrdiff_t) ((char *)end - (char*)start); - runtime_pseudo_reloc_v2 *v2_hdr = (runtime_pseudo_reloc_v2 *) start; - runtime_pseudo_reloc_item_v2 *r; - - /* A valid relocation list will contain at least one entry, and - * one v1 data structure (the smallest one) requires two DWORDs. - * So, if the relocation list is smaller than 8 bytes, bail. - */ - if (reloc_target < 8) - return; - - /* Check if this is the old pseudo relocation version. */ - /* There are two kinds of v1 relocation lists: - * 1) With a (v2-style) version header. In this case, the - * first entry in the list is a 3-DWORD structure, with - * value: - * { 0, 0, RP_VERSION_V1 } - * In this case, we skip to the next entry in the list, - * knowing that all elements after the head item can - * be cast to runtime_pseudo_reloc_item_v1. - * 2) Without a (v2-style) version header. In this case, the - * first element in the list IS an actual v1 relocation - * record, which is two DWORDs. Because there will never - * be a case where a v1 relocation record has both - * addend == 0 and target == 0, this case will not be - * confused with the prior one. - * All current binutils, when generating a v1 relocation list, - * use the second (e.g. original) form -- that is, without the - * v2-style version header. - */ - if (reloc_target >= 12 - && v2_hdr->magic1 == 0 && v2_hdr->magic2 == 0 - && v2_hdr->version == RP_VERSION_V1) - { - /* We have a list header item indicating that the rest - * of the list contains v1 entries. Move the pointer to - * the first true v1 relocation record. By definition, - * that v1 element will not have both addend == 0 and - * target == 0 (and thus, when interpreted as a - * runtime_pseudo_reloc_v2, it will not have both - * magic1 == 0 and magic2 == 0). - */ - v2_hdr++; - } - - if (v2_hdr->magic1 != 0 || v2_hdr->magic2 != 0) - { - /************************* - * Handle v1 relocations * - *************************/ - runtime_pseudo_reloc_item_v1 * o; - for (o = (runtime_pseudo_reloc_item_v1 *) v2_hdr; - o < (runtime_pseudo_reloc_item_v1 *)end; - o++) - { - DWORD newval; - reloc_target = (ptrdiff_t) base + o->target; - newval = (*((DWORD*) reloc_target)) + o->addend; - __write_memory ((void *) reloc_target, &newval, sizeof(DWORD)); - } - return; - } - - /* If we got this far, then we have relocations of version 2 or newer */ - - /* Check if this is a known version. */ - if (v2_hdr->version != RP_VERSION_V2) - { - __report_error (" Unknown pseudo relocation protocol version %d.\n", - (int) v2_hdr->version); - return; - } - - /************************* - * Handle v2 relocations * - *************************/ - - /* Walk over header. */ - r = (runtime_pseudo_reloc_item_v2 *) &v2_hdr[1]; - - for (; r < (runtime_pseudo_reloc_item_v2 *) end; r++) - { - /* location where new address will be written */ - reloc_target = (ptrdiff_t) base + r->target; - - /* get sym pointer. It points either to the iat entry - * of the referenced element, or to the stub function. - */ - addr_imp = (ptrdiff_t) base + r->sym; - addr_imp = *((ptrdiff_t *) addr_imp); - - /* read existing relocation value from image, casting to the - * bitsize indicated by the 8 LSBs of flags. If the value is - * negative, manually sign-extend to ptrdiff_t width. Raise an - * error if the bitsize indicated by the 8 LSBs of flags is not - * supported. - */ - switch ((r->flags & 0xff)) - { - case 8: - reldata = (ptrdiff_t) (*((unsigned char *)reloc_target)); - if ((reldata & 0x80) != 0) - reldata |= ~((ptrdiff_t) 0xff); - break; - case 16: - reldata = (ptrdiff_t) (*((unsigned short *)reloc_target)); - if ((reldata & 0x8000) != 0) - reldata |= ~((ptrdiff_t) 0xffff); - break; - case 32: - reldata = (ptrdiff_t) (*((unsigned int *)reloc_target)); -#ifdef _WIN64 - if ((reldata & 0x80000000) != 0) - reldata |= ~((ptrdiff_t) 0xffffffff); -#endif - break; -#ifdef _WIN64 - case 64: - reldata = (ptrdiff_t) (*((unsigned long long *)reloc_target)); - break; -#endif - default: - reldata=0; - __report_error (" Unknown pseudo relocation bit size %d.\n", - (int) (r->flags & 0xff)); - break; - } - - /* Adjust the relocation value */ - reldata -= ((ptrdiff_t) base + r->sym); - reldata += addr_imp; - - /* Write the new relocation value back to *reloc_target */ - switch ((r->flags & 0xff)) - { - case 8: - __write_memory ((void *) reloc_target, &reldata, 1); - break; - case 16: - __write_memory ((void *) reloc_target, &reldata, 2); - break; - case 32: - __write_memory ((void *) reloc_target, &reldata, 4); - break; -#ifdef _WIN64 - case 64: - __write_memory ((void *) reloc_target, &reldata, 8); - break; -#endif - } - } -} - -void -_pei386_runtime_relocator (void) -{ - static NO_COPY int was_init = 0; - if (was_init) - return; - ++was_init; - do_pseudo_reloc (&__RUNTIME_PSEUDO_RELOC_LIST__, - &__RUNTIME_PSEUDO_RELOC_LIST_END__, - &__MINGW_LSYMBOL(_image_base__)); -} |