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MakeImport: deal with absence of 'cfrg' resource

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This commit is contained in:
Wolfgang Thaller 2017-04-23 11:28:48 +02:00
parent e3c57148f8
commit 61e33b198c
1 changed files with 148 additions and 37 deletions
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185
PEFTools/MakeImport.cc
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@ -1,5 +1,6 @@
#include <iostream>
#include <fstream>
#include <sstream>
#include <utility>
#include <vector>
#include <string>
@ -34,6 +35,23 @@ using std::string;
using std::ofstream;
using std::ios_base;
bool verboseFlag = false;
struct CFragMember
{
string name;
uint32_t architecture;
uint8_t usage;
char *data;
uint32_t length;
CFragMember() : architecture(0), usage(0), data(0), length(0) {}
CFragMember(string n, uint32_t a, uint8_t u, char *d, uint32_t l)
: name(n), architecture(a), usage(u), data(d), length(l)
{
}
};
void RunCommand(const char *command, std::vector<std::string> args)
{
std::vector<const char*> ptrs;
@ -202,61 +220,154 @@ void MakeImportLibraryMulti(fs::path path, fs::path libname)
char *dataPtr = data.data();
if(resFile.resources.resources.find(ResRef("cfrg",0)) == resFile.resources.resources.end())
{
if(data.size() > 8 && std::string(data.begin(), data.begin()+8) == "Joy!peff")
{
std::cerr << "No cfrg resource found.\n";
exit(1);
}
else
{
std::cerr << "Not a PEF shared library. Ignoring.\n";
exit(0);
}
}
Resource& cfrgRes = resFile.resources.resources[ResRef("cfrg",0)];
std::vector<CFragMember> members;
fs::path tmpdir = libname.parent_path() / fs::unique_path("makeimport-tmp-%%%%-%%%%-%%%%-%%%%");
fs::create_directory(tmpdir);
try
if(data.size() < 8 || std::string(data.begin(), data.begin()+8) != "Joy!peff")
{
std::cerr << "Not a PEF shared library. Ignoring.\n";
return;
}
if(resFile.resources.resources.find(ResRef("cfrg",0)) != resFile.resources.resources.end())
{
// Plan A: cfrg resource found, use it.
Resource& cfrgRes = resFile.resources.resources[ResRef("cfrg",0)];
CFragResource *cfrg = (CFragResource *)cfrgRes.getData().data();
eswap(cfrg);
CFragResourceMember *member = &(cfrg -> firstMember);
fs::path archiveTmp(tmpdir / "__archive.a");
std::vector<string> arArguments { "cq", archiveTmp.string() };
for(UInt16 i = 0; i < cfrg->memberCount; i++)
{
eswap(member);
string membername =
string(member->name+1, member->name+1+member->name[0]);
members.emplace_back(
membername,
member->architecture,
member->usage,
dataPtr + member->offset,
member->length);
if(member->architecture == 'pwpc'
|| member->architecture == '\?\?\?\?')
member = (CFragResourceMember*) (((char*)member) + member->memberSize);
}
}
else
{
// Plan B: resource fork may have been lost or misplaced.
// Assume that the data fork contains consecutive PEF containers.
// Hard-code weak linking flags (usage field in cfrg resource)
// for CarbonFrameworkLib and parts of CarbonLib
if(verboseFlag)
std::cerr << "No 'cfrg' resource found, making educated guesses.\n";
bool allWeak = false;
bool restWeak = false;
if(path.filename() == "CarbonLib")
restWeak = true;
else if(path.filename() == "CarbonFrameworkLib")
allWeak = true;
char *pefptr = dataPtr, *nextpef = pefptr;
char *end = dataPtr + data.size();
int memberIndex = 0;
while(pefptr < end)
{
while(pefptr < end && *pefptr != 'J')
++pefptr;
if(pefptr >= end)
break;
std::cout << std::hex << pefptr - dataPtr << " (end = " << end-dataPtr << ")\n" << std::dec;
PEFContainerHeader *containerHeader = (PEFContainerHeader*) pefptr;
eswap(containerHeader);
assert(containerHeader->tag1 == 'Joy!');
assert(containerHeader->tag2 == 'peff');
PEFSectionHeader *sectionHeaders
= (PEFSectionHeader*) (pefptr + kPEFFirstSectionHeaderOffset);
UInt16 n = containerHeader->sectionCount;
for(UInt16 i=0; i < n; i++)
{
if(member->usage == 0 /* import library */
|| member->usage == 3 /* stub library */)
;
else if(member->usage == 4 /* weak stub library */)
membername += "__weak";
else
{
std::cerr << "Inappropriate usage flag: "
<< (int)member->usage << endl;
continue;
}
eswap(&sectionHeaders[i]);
char * p = pefptr + sectionHeaders[i].containerOffset + sectionHeaders[i].containerLength;
if(p > nextpef)
nextpef = p;
eswap(&sectionHeaders[i]); // restore endianness
}
std::ostringstream memberNameStream;
memberNameStream << "stub" << memberIndex;
bool weak = allWeak || (memberIndex != 0 && restWeak);
members.emplace_back(
memberNameStream.str(),
containerHeader->architecture,
weak ? 4 : 3, /* wek stub library or stub library */
pefptr,
nextpef - pefptr);
fs::path shlib_file(tmpdir / (membername + ".o"));
MakeImportLibrary(dataPtr + member->offset, member->length,
eswap(containerHeader); // restore endianness
memberIndex++;
pefptr = nextpef;
}
}
fs::path tmpdir = libname.parent_path() / fs::unique_path("makeimport-tmp-%%%%-%%%%-%%%%-%%%%");
fs::create_directory(tmpdir);
try
{
fs::path archiveTmp(tmpdir / "__archive.a");
std::vector<string> arArguments { "cq", archiveTmp.string() };
int memberIndex = 0;
for(auto &member : members)
{
std::ostringstream memberNameStream;
for(char c : member.name)
{
if(isalnum(c))
memberNameStream << c;
}
memberNameStream << "_" << memberIndex++;
string memberName = memberNameStream.str();
if(member.usage == 0 /* import library */
|| member.usage == 3 /* stub library */)
;
else if(member.usage == 4 /* weak stub library */)
memberName += "__weak";
if(verboseFlag)
{
char archStr[5];
archStr[0] = member.architecture >> 24;
archStr[1] = member.architecture >> 16;
archStr[2] = member.architecture >> 8;
archStr[3] = member.architecture;
archStr[4] = 0;
std::cerr << memberName << " (" << archStr << ")\n";
}
if(member.architecture == 'pwpc'
|| member.architecture == '\?\?\?\?')
{
fs::path shlib_file(tmpdir / (memberName + ".o"));
MakeImportLibrary(member.data, member.length,
shlib_file, tmpdir);
arArguments.push_back(shlib_file.string());
}
member = (CFragResourceMember*) (((char*)member) + member->memberSize);
}
RunCommand("powerpc-apple-macos-ar", arArguments);