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Bug 1082670: Copy breakpadinjector's image header into the remote process. r=bsmedberg

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This commit is contained in:
David Major 2014-10-22 09:01:16 +13:00
parent dd534796e8
commit 9acf1c0149
1 changed files with 46 additions and 30 deletions
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76
toolkit/crashreporter/LoadLibraryRemote.cpp
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@ -95,6 +95,35 @@ CopySections(const unsigned char *data, PIMAGE_NT_HEADERS old_headers, PMEMORYMO
}
}
static bool
CopyRegion(HANDLE hRemoteProcess, void* remoteAddress, void* localAddress, DWORD size, DWORD protect)
{
if (size > 0) {
// Copy the data from local->remote and set the memory protection
if (!VirtualAllocEx(hRemoteProcess, remoteAddress, size, MEM_COMMIT, PAGE_READWRITE))
return false;
if (!WriteProcessMemory(hRemoteProcess,
remoteAddress,
localAddress,
size,
nullptr)) {
#ifdef DEBUG_OUTPUT
OutputLastError("Error writing remote memory.\n");
#endif
return false;
}
DWORD oldProtect;
if (VirtualProtectEx(hRemoteProcess, remoteAddress, size, protect, &oldProtect) == 0) {
#ifdef DEBUG_OUTPUT
OutputLastError("Error protecting memory page");
#endif
return false;
}
}
return true;
}
// Protection flags for memory pages (Executable, Readable, Writeable)
static int ProtectionFlags[2][2][2] = {
{
@ -117,11 +146,20 @@ FinalizeSections(PMEMORYMODULE module, HANDLE hRemoteProcess)
#endif
int i;
int numSections = module->headers->FileHeader.NumberOfSections;
if (numSections < 1)
return false;
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
// Copy any data before the first section (i.e. the image header)
if (!CopyRegion(hRemoteProcess, module->remoteCodeBase, module->localCodeBase, section->VirtualAddress, PAGE_READONLY))
return false;
// loop through all sections and change access flags
for (i=0; i<module->headers->FileHeader.NumberOfSections; i++, section++) {
DWORD protect, oldProtect, size;
for (i=0; i<numSections; i++, section++) {
DWORD protect, size;
int executable = (section->Characteristics & IMAGE_SCN_MEM_EXECUTE) != 0;
int readable = (section->Characteristics & IMAGE_SCN_MEM_READ) != 0;
int writeable = (section->Characteristics & IMAGE_SCN_MEM_WRITE) != 0;
@ -132,39 +170,17 @@ FinalizeSections(PMEMORYMODULE module, HANDLE hRemoteProcess)
protect |= PAGE_NOCACHE;
}
void* remoteAddress = module->remoteCodeBase + section->VirtualAddress;
void* localAddress = module->localCodeBase + section->VirtualAddress;
// determine size of region
size = section->Misc.VirtualSize;
if (size > 0) {
void* remoteAddress = module->remoteCodeBase + section->VirtualAddress;
void* localAddress = module->localCodeBase + section->VirtualAddress;
#ifdef DEBUG_OUTPUT
fprintf(stderr, "Copying section %s to %p, size %x, executable %i readable %i writeable %i\n",
section->Name, remoteAddress, size, executable, readable, writeable);
#endif
// Copy the data from local->remote and set the memory protection
if (!VirtualAllocEx(hRemoteProcess, remoteAddress, size, MEM_COMMIT, PAGE_READWRITE))
return false;
if (!WriteProcessMemory(hRemoteProcess,
remoteAddress,
localAddress,
size,
nullptr)) {
#ifdef DEBUG_OUTPUT
OutputLastError("Error writing remote memory.\n");
#endif
return false;
}
if (VirtualProtectEx(hRemoteProcess, remoteAddress, size, protect, &oldProtect) == 0) {
#ifdef DEBUG_OUTPUT
OutputLastError("Error protecting memory page");
#endif
return false;
}
}
if (!CopyRegion(hRemoteProcess, remoteAddress, localAddress, size, protect))
return false;
}
return true;
}