diff options
Diffstat (limited to 'winsup/mingw/pseudo-reloc.c')
| -rw-r--r-- | winsup/mingw/pseudo-reloc.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/winsup/mingw/pseudo-reloc.c b/winsup/mingw/pseudo-reloc.c deleted file mode 100644 index ea9f37631..000000000 --- a/winsup/mingw/pseudo-reloc.c +++ /dev/null @@ -1,180 +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 <string.h> -#include <assert.h> - - extern char __RUNTIME_PSEUDO_RELOC_LIST__; - extern char __RUNTIME_PSEUDO_RELOC_LIST_END__; - extern char _image_base__; - -typedef struct { - DWORD addend; - DWORD target; -} runtime_pseudo_reloc_item_v1; - -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 -__write_memory (void *addr,const void *src,size_t len) -{ - MEMORY_BASIC_INFORMATION b; - DWORD oldprot; - if (!len) - return; - assert (VirtualQuery (addr, &b, sizeof(b))); - /* 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); - memcpy (addr, src, len); - 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; - - if (reloc_target < 8) - return; - /* Check if this is old version pseudo relocation version. */ - if (reloc_target >= 12 - && v2_hdr->magic1 == 0 && v2_hdr->magic2 == 0 - && v2_hdr->version == RP_VERSION_V1) - v2_hdr++; - if (v2_hdr->magic1 != 0 || v2_hdr->magic2 != 0) - { - 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; - } - - /* Check if this is a known version. */ - if (v2_hdr->version != RP_VERSION_V2) - { -#ifdef DEBUG - fprintf (stderr, "internal mingw runtime error:" - "psuedo_reloc version %d is unknown to this runtime.\n", - (int) v2_hdr->version); -#endif - return; - } - - /* Walk over header. */ - r = (runtime_pseudo_reloc_item_v2 *) &v2_hdr[1]; - - for (; r < (runtime_pseudo_reloc_item_v2 *) end; r++) - { - reloc_target = (ptrdiff_t) base + r->target; - addr_imp = (ptrdiff_t) base + r->sym; - addr_imp = *((ptrdiff_t *) addr_imp); - - 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; -#ifdef DEBUG - fprintf(stderr, "internal mingw runtime error: " - "unknown pseudo_reloc bit size %d\n", - (int) (r->flags & 0xff)); -#endif - break; - } - reldata -= ((ptrdiff_t) base + r->sym); - reldata += addr_imp; - 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 () -{ - static int was_init = 0; - if (was_init) - return; - ++was_init; - do_pseudo_reloc (&__RUNTIME_PSEUDO_RELOC_LIST__, - &__RUNTIME_PSEUDO_RELOC_LIST_END__, - &_image_base__); -} |