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--- dyld/dyld-1340/mach_o/Header.cpp
+++ dyld/dyld-1162/mach_o/Header.cpp
@@ -33,93 +33,35 @@
#include <unistd.h>
#endif
-#include <mach-o/fixup-chains.h>
-
#include "Array.h"
#include "Header.h"
#include "Architecture.h"
#include "Misc.h"
#include "Policy.h"
#include "LoggingStub.h"
-#include "TargetPolicy.h"
-#include "Version32.h"
-
-#if TARGET_OS_EXCLAVEKIT
-#ifndef VM_PROT_READ
- #define VM_PROT_READ 1
-#endif
-
-#ifndef VM_PROT_WRITE
- #define VM_PROT_WRITE 2
-#endif
-
-#ifndef VM_PROT_EXECUTE
- #define VM_PROT_EXECUTE 4
-#endif
-#endif // TARGET_OS_EXCLAVEKIT
using mach_o::Architecture;
using mach_o::Platform;
using mach_o::PlatformAndVersions;
using mach_o::Policy;
-using mach_o::Version32;
namespace mach_o {
-
//
-// MARK: --- LinkedDylibAttributes ---
+// MARK: --- DependentDylibAttributes ---
//
-constinit const LinkedDylibAttributes LinkedDylibAttributes::regular;
-constinit const LinkedDylibAttributes LinkedDylibAttributes::justWeakLink(DYLIB_USE_WEAK_LINK);
-constinit const LinkedDylibAttributes LinkedDylibAttributes::justUpward(DYLIB_USE_UPWARD);
-constinit const LinkedDylibAttributes LinkedDylibAttributes::justReExport(DYLIB_USE_REEXPORT);
-constinit const LinkedDylibAttributes LinkedDylibAttributes::justDelayInit(DYLIB_USE_DELAYED_INIT);
-
-void LinkedDylibAttributes::toString(char buf[64]) const
-{
- buf[0] = '\0';
- if ( weakLink )
- strlcpy(buf, "weak-link", 64);
- if ( upward ) {
- if ( buf[0] != '\0' )
- strlcat(buf, ",", 64);
- strlcat(buf, "upward", 64);
- }
- if ( delayInit ) {
- if ( buf[0] != '\0' )
- strlcat(buf, ",", 64);
- strlcat(buf, "delay-init", 64);
- }
- if ( reExport ) {
- if ( buf[0] != '\0' )
- strlcat(buf, ",", 64);
- strlcat(buf, "re-export", 64);
- }
-}
+constinit const DependentDylibAttributes DependentDylibAttributes::regular;
+constinit const DependentDylibAttributes DependentDylibAttributes::justWeakLink(DYLIB_USE_WEAK_LINK);
+constinit const DependentDylibAttributes DependentDylibAttributes::justUpward(DYLIB_USE_UPWARD);
+constinit const DependentDylibAttributes DependentDylibAttributes::justReExport(DYLIB_USE_REEXPORT);
+constinit const DependentDylibAttributes DependentDylibAttributes::justDelayInit(DYLIB_USE_DELAYED_INIT);
//
// MARK: --- methods that read mach_header ---
//
-
-bool Header::isSharedCacheEligiblePath(const char* dylibName) {
- return ( (strncmp(dylibName, "/usr/lib/", 9) == 0)
- || (strncmp(dylibName, "/System/Library/", 16) == 0)
- || (strncmp(dylibName, "/System/iOSSupport/usr/lib/", 27) == 0)
- || (strncmp(dylibName, "/System/iOSSupport/System/Library/", 34) == 0)
- || (strncmp(dylibName, "/Library/Apple/usr/lib/", 23) == 0)
- || (strncmp(dylibName, "/Library/Apple/System/Library/", 30) == 0)
- || (strncmp(dylibName, "/System/DriverKit/", 18) == 0)
- || (strncmp(dylibName, "/System/Cryptexes/OS/usr/lib/", 29) == 0)
- || (strncmp(dylibName, "/System/Cryptexes/OS/System/Library/", 36) == 0)
- || (strncmp(dylibName, "/System/Cryptexes/OS/System/iOSSupport/usr/lib/", 47) == 0)
- || (strncmp(dylibName, "/System/Cryptexes/OS/System/iOSSupport/System/Library/", 54) == 0)
- || (strncmp(dylibName, "/System/ExclaveKit/usr/lib/", 27) == 0)
- || (strncmp(dylibName, "/System/ExclaveKit/System/Library/", 34) == 0));
-}
bool Header::hasMachOMagic() const
{
@@ -147,11 +89,6 @@
return 8;
else
return 4;
-}
-
-uint32_t Header::ncmds() const
-{
- return mh.ncmds;
}
bool Header::uses16KPages() const
@@ -191,10 +128,9 @@
bool Header::isDyldManaged() const
{
switch ( mh.filetype ) {
+ case MH_BUNDLE:
+ case MH_EXECUTE:
case MH_DYLIB:
- case MH_BUNDLE:
- return true;
- case MH_EXECUTE:
return ((mh.flags & MH_DYLDLINK) != 0);
default:
break;
@@ -207,16 +143,6 @@
return (mh.filetype == MH_DYLIB);
}
-bool Header::isDylibOrStub() const
-{
- return (mh.filetype == MH_DYLIB) || (mh.filetype == MH_DYLIB_STUB);
-}
-
-bool Header::isDylibStub() const
-{
- return (mh.filetype == MH_DYLIB_STUB);
-}
-
bool Header::isBundle() const
{
return (mh.filetype == MH_BUNDLE);
@@ -261,11 +187,6 @@
return (mh.filetype == MH_PRELOAD);
}
-bool Header::usesTwoLevelNamespace() const
-{
- return (mh.flags & MH_TWOLEVEL);
-}
-
bool Header::hasWeakDefs() const
{
return (mh.flags & MH_WEAK_DEFINES);
@@ -286,10 +207,9 @@
if ( content.size() < sizeof(mach_header) )
return nullptr;
- if ( const Header* mh = (const Header*)content.data() ) {
- if ( mh->hasMachOMagic() )
- return mh;
- }
+ const Header* mh = (const Header*)content.data();
+ if ( mh->hasMachOMagic() )
+ return mh;
return nullptr;
}
@@ -324,11 +244,6 @@
return (this->mh.flags & MH_SIM_SUPPORT) != 0;
}
-bool Header::noDynamicAccess() const
-{
- return (this->mh.flags & MH_NO_DYNAMIC_ACCESS) != 0;
-}
-
//
// MARK: --- methods for validating mach-o content ---
@@ -340,17 +255,13 @@
__block PlatformAndVersions pvs;
forEachPlatformLoadCommand(^(Platform platform, Version32 minOS, Version32 sdk) {
Error err = pvs.zip({ platform, minOS, sdk });
- // .zip() will not combine platforms if it is an invalid combo
+ assert(err.noError());
});
return pvs;
}
Error Header::validSemanticsPlatform() const
{
- // Kernel Collections (MH_FILESET) don't have a platform. Skip them
- if ( isFileSet() )
- return Error::none();
-
// should be one platform load command (exception is zippered dylibs)
__block PlatformAndVersions pvs;
__block Error badPlatform;
@@ -366,16 +277,10 @@
if ( badPlatform )
return std::move(badPlatform);
- if ( pvs.platform.empty() && gHeaderAllowEmptyPlatform )
+#if BUILDING_MACHO_WRITER
+ if ( pvs.platform.empty() )
return Error::none(); // allow empty platform in static linker
-
- // preloads usually don't have a platform
- if ( isPreload() )
- return Error::none();
-
- // static executables also may not have one
- if ( isStaticExecutable() )
- return Error::none();
+#endif
return pvs.platform.valid();
}
@@ -383,7 +288,7 @@
Error Header::valid(uint64_t fileSize) const
{
if ( fileSize < sizeof(mach_header) )
- return Error("file is too small (length=%llu)", fileSize);
+ return Error("file is too short");
if ( !hasMachOMagic() )
return Error("not a mach-o file (start is no MH_MAGIC[_64])");
@@ -403,7 +308,7 @@
if ( Error err = validSemanticsInstallName(policy) )
return err;
- if ( Error err = validSemanticsLinkedDylibs(policy) )
+ if ( Error err = validSemanticsDependents(policy) )
return err;
if ( Error err = validSemanticsRPath(policy) )
@@ -430,7 +335,7 @@
const char* str = (char*)cmd + strOffset;
const char* end = (char*)cmd + cmd->cmdsize;
- for ( const char* s = end-1; s >= str; --s ) {
+ for ( const char* s = str; s < end; ++s ) {
if ( *s == '\0' ) {
return Error::none();
}
@@ -446,11 +351,10 @@
return Error("load commands length (%llu) exceeds length of file (%llu)", headerAndLCSize, fileSize);
}
- // check for recognized filetype
+ // check for reconized filetype
switch ( mh.filetype ) {
case MH_EXECUTE:
case MH_DYLIB:
- case MH_DYLIB_STUB:
case MH_DYLINKER:
case MH_BUNDLE:
case MH_KEXT_BUNDLE:
@@ -574,14 +478,6 @@
case LC_FILESET_ENTRY:
fileSetCmd = (fileset_entry_command*)cmd;
lcError = stringOverflow(cmd, index, fileSetCmd->entry_id.offset);
- break;
- case LC_FUNCTION_VARIANTS:
- if ( cmd->cmdsize != sizeof(linkedit_data_command) )
- lcError = Error("load command #%d LC_FUNCTION_VARIANTS size wrong", index);
- break;
- case LC_FUNCTION_VARIANT_FIXUPS:
- if ( cmd->cmdsize != sizeof(linkedit_data_command) )
- lcError = Error("load command #%d LC_FUNCTION_VARIANT_FIXUPS size wrong", index);
break;
default:
if ( cmd->cmd & LC_REQ_DYLD )
@@ -634,12 +530,11 @@
});
if ( uuidCount > 1 )
return Error("too many LC_UUID load commands");
- if ( (uuidCount == 0) && policy.enforceHasUUID() ) {
- return Error("missing LC_UUID load command");
- }
+ if ( (uuidCount == 0) && policy.enforceHasUUID() )
+ return Error("missing LC_UUID load command");
+
return Error::none();
}
-
Error Header::validSemanticsInstallName(const Policy& policy) const
{
@@ -655,7 +550,7 @@
if ( foundCount > 1 )
return Error("multiple LC_ID_DYLIB found");
- if ( this->isDylibOrStub() ) {
+ if ( this->isDylib() ) {
if ( installName == nullptr )
return Error("MH_DYLIB is missing LC_ID_DYLIB");
#if 0 // FIXME: need path plumbed down
@@ -683,7 +578,7 @@
return Error::none();
}
-Error Header::validSemanticsLinkedDylibs(const Policy& policy) const
+Error Header::validSemanticsDependents(const Policy& policy) const
{
// gather info
__block Error dupDepError;
@@ -692,7 +587,7 @@
const char** depPaths = depPathsBuffer;
const bool enforceNoDupDylibs = policy.enforceNoDuplicateDylibs();
const bool hasWarningHandler = mach_o::hasWarningHandler();
- // don't use forEachLinkedDylib, because it synthesizes libSystem.dylib
+ // don't use forEachDependentDylib, because it synthesizes libSystem.dylib
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
switch ( cmd->cmd ) {
case LC_LOAD_DYLIB:
@@ -705,10 +600,10 @@
for ( int i = 0; i < depCount; ++i ) {
if ( strcmp(loadPath, depPaths[i]) == 0 ) {
if ( enforceNoDupDylibs ) {
- dupDepError = Error("duplicate linked dylib '%s'", loadPath);
+ dupDepError = Error("duplicate dependent dylib '%s'", loadPath);
stop = true;
} else
- warning(this, "duplicate linked dylib are deprecated ('%s')", loadPath);
+ warning(this, "duplicate dependent dylib are deprecated ('%s')", loadPath);
}
}
depPaths[depCount] = loadPath;
@@ -723,9 +618,24 @@
// all new binaries must link with something
if ( this->isDyldManaged() && policy.enforceHasLinkedDylibs() && (depCount == 0) ) {
// except for dylibs in libSystem.dylib which are ok to link with nothing (they are on bottom)
- CString installName = this->installName();
- CString libSystemDir = platformAndVersions().platform.libSystemDir();
- if ( !installName.starts_with(libSystemDir) )
+ const char* installName = this->installName();
+ bool isLibSystem = false;
+ if (installName != nullptr) {
+ if ( this->builtForPlatform(Platform::driverKit, true) ) {
+ const char* libSystemDir = "/System/DriverKit/usr/lib/system/";
+ if ( strncmp(installName, libSystemDir, strlen(libSystemDir)) != 0 )
+ isLibSystem = true;
+ } else if ( this->platformAndVersions().platform.isExclaveKit() ) {
+ const char* libSystemDir = "/System/ExclaveKit/usr/lib/system/";
+ if ( strncmp(installName, libSystemDir, strlen(libSystemDir)) != 0 )
+ isLibSystem = true;
+ } else {
+ const char* libSystemDir = "/usr/lib/system/";
+ if ( strncmp(installName, libSystemDir, strlen(libSystemDir)) != 0 )
+ isLibSystem = true;
+ }
+ }
+ if ( !isLibSystem )
return Error("missing LC_LOAD_DYLIB (must link with at least libSystem.dylib)");
}
return Error::none();
@@ -769,12 +679,8 @@
return Error("segment '%s' load command content extends beyond end of file", seg->segname);
// <rdar://problem/19986776> dyld should support non-allocatable __LLVM segment
- // <rdar://problem/144216621> dyld should support non-allocatable __DWARF segment (golang)
- if ( !isObjectFile() && (seg->filesize > seg->vmsize) ) {
- // non-mapped segments must have vmsize==0 and initprot==0
- if ( (seg->vmsize == 0) && (seg->initprot == 0) )
- return Error::none(); // no more checks of segment because it is not mapped
- else
+ if ( !isObjectFile() ) {
+ if ( (seg->filesize > seg->vmsize) && ((seg->vmsize != 0) || ((seg->flags & SG_NORELOC) == 0)) )
return Error("segment '%s' filesize exceeds vmsize", seg->segname);
}
@@ -782,7 +688,7 @@
if ( (seg->initprot & 0xFFFFFFF8) != 0 ) {
return Error("%s segment permissions has invalid bits set (0x%08X)", seg->segname, seg->initprot);
}
- if ( this->isDyldManaged() && policy.enforceTextSegmentPermissions() ) {
+ if ( policy.enforceTextSegmentPermissions() ) {
if ( (strcmp(seg->segname, "__TEXT") == 0) && (seg->initprot != (VM_PROT_READ | VM_PROT_EXECUTE)) )
return Error("__TEXT segment permissions is not 'r-x'");
}
@@ -790,26 +696,17 @@
if ( (strcmp(seg->segname, "__LINKEDIT") == 0) && (seg->initprot != VM_PROT_READ) )
return Error("__LINKEDIT segment permissions is not 'r--'");
}
- // dylib stubs don't have LC_SEGMENT_SPLIT_INFO, so they trip on SG_READ_ONLY check because
- // the split seg info exception can't be applied
- if ( !isDylibStub() && policy.enforceDataSegmentPermissions() ) {
+ if ( policy.enforceDataSegmentPermissions() ) {
if ( (strcmp(seg->segname, "__DATA") == 0) && (seg->initprot != (VM_PROT_READ | VM_PROT_WRITE)) )
return Error("__DATA segment permissions is not 'rw-'");
if ( strcmp(seg->segname, "__DATA_CONST") == 0 ) {
if ( seg->initprot != (VM_PROT_READ | VM_PROT_WRITE) )
return Error("__DATA_CONST segment permissions is not 'rw-'");
if ( (seg->flags & SG_READ_ONLY) == 0 ) {
- bool isSplitSegMarker = false;
- if ( this->isDylibOrStub() && this->hasSplitSegInfo(isSplitSegMarker) && !isSplitSegMarker ) {
- // dylibs intended for dyld cache are allowed to not have SG_READ_ONLY set
- }
- else if ( this->inDyldCache() ) {
+ if ( this->isDylib() && this->hasSplitSegInfo() ) {
// dylibs in dyld cache are allowed to not have SG_READ_ONLY set
}
- else if ( this->isStaticExecutable() ) {
- // static excutables don't use dyld so have no way to make DATA_CONST read-only
- }
- else if ( policy.enforceDataConstSegmentPermissions() ) {
+ else {
return Error("__DATA_CONST segment missing SG_READ_ONLY flag");
}
}
@@ -820,32 +717,28 @@
if ( (seg->vmaddr + seg->vmsize) < seg->vmaddr )
return Error("'%s' segment vm range wraps", seg->segname);
- // dylib stubs have no section data
- if ( !isDylibStub() ) {
- // check sections are within its segment
- const SC* const sectionsStart = (SC*)((char*)seg + sizeof(SG));
- const SC* const sectionsEnd = §ionsStart[seg->nsects];
- for ( const SC* sect = sectionsStart; (sect < sectionsEnd); ++sect ) {
- if ( (int64_t)(sect->size) < 0 ) {
- return Error("section '%s' size too large 0x%lX", sect->sectname, (size_t)sect->size);
- }
- else if ( sect->addr < seg->vmaddr ) {
- return Error("section '%s' start address 0x%lX is before containing segment's address 0x%0lX", sect->sectname, (size_t)sect->addr, (size_t)seg->vmaddr);
- }
- else if ( policy.enforceSectionsInSegment() && (sect->addr + sect->size > seg->vmaddr + seg->vmsize) ) {
- return Error("section '%s' end address 0x%lX is beyond containing segment's end address 0x%0lX", sect->sectname, (size_t)(sect->addr + sect->size), (size_t)(seg->vmaddr + seg->vmsize));
- }
+ // check sections are within its segment
+ const SC* const sectionsStart = (SC*)((char*)seg + sizeof(SG));
+ const SC* const sectionsEnd = §ionsStart[seg->nsects];
+ for ( const SC* sect = sectionsStart; (sect < sectionsEnd); ++sect ) {
+ if ( (int64_t)(sect->size) < 0 ) {
+ return Error("section '%s' size too large 0x%lX", sect->sectname, (size_t)sect->size);
+ }
+ else if ( sect->addr < seg->vmaddr ) {
+ return Error("section '%s' start address 0x%lX is before containing segment's address 0x%0lX", sect->sectname, (size_t)sect->addr, (size_t)seg->vmaddr);
+ }
+ else if ( policy.enforceSectionsInSegment() && (sect->addr + sect->size > seg->vmaddr + seg->vmsize) ) {
+ return Error("section '%s' end address 0x%lX is beyond containing segment's end address 0x%0lX", sect->sectname, (size_t)(sect->addr + sect->size), (size_t)(seg->vmaddr + seg->vmsize));
}
}
return Error::none();
}
+
#endif // !TARGET_OS_EXCLAVEKIT
-
-struct VIS_HIDDEN Interval
+struct Interval
{
bool overlaps(const Interval& other) const;
- uint64_t size() const { return end - start; }
uint64_t start;
uint64_t end;
};
@@ -862,13 +755,14 @@
{
Interval vm;
Interval file;
- CString name;
+ const char* name;
};
STACK_ALLOC_OVERFLOW_SAFE_ARRAY(SegRange, ranges, 12);
__block Error lcError;
__block bool hasTEXT = false;
__block bool hasLINKEDIT = false;
__block uint64_t segmentIndexText = 0;
+ __block uint64_t segmentIndexLinkedit = 0;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
if ( cmd->cmd == LC_SEGMENT_64 ) {
const segment_command_64* seg64 = (segment_command_64*)cmd;
@@ -878,6 +772,7 @@
}
else if ( strcmp(seg64->segname, "__LINKEDIT") == 0 ) {
hasLINKEDIT = true;
+ segmentIndexLinkedit = ranges.count();
}
lcError = validSegment<segment_command_64, section_64>(policy, fileSize, seg64);
ranges.push_back({ { seg64->vmaddr, seg64->vmaddr + seg64->vmsize }, { seg64->fileoff, seg64->fileoff + seg64->filesize }, seg64->segname });
@@ -890,6 +785,7 @@
}
else if ( strcmp(seg32->segname, "__LINKEDIT") == 0 ) {
hasLINKEDIT = true;
+ segmentIndexLinkedit = ranges.count();
}
lcError = validSegment<segment_command, section>(policy, fileSize, seg32);
ranges.push_back({ { seg32->vmaddr, seg32->vmaddr + seg32->vmsize }, { seg32->fileoff, seg32->fileoff + seg32->filesize }, seg32->segname });
@@ -903,56 +799,50 @@
// dynamic binaries have further restrictions
if ( isDyldManaged() ) {
if ( hasTEXT ) {
- if ( !this->inDyldCache() && (ranges[segmentIndexText].file.start != 0) )
+ if ( ranges[segmentIndexText].file.start != 0 )
return Error("__TEXT segment fileoffset is not zero");
const uint32_t headerAndLCSize = machHeaderSize() + mh.sizeofcmds;
- if ( ranges[segmentIndexText].file.size() < headerAndLCSize )
- return Error("load commands do not fit in __TEXT segment filesize");
- if ( ranges[segmentIndexText].vm.size() < headerAndLCSize )
- return Error("load commands do not fit in __TEXT segment vmsize");
+ if ( ranges[segmentIndexText].file.end < headerAndLCSize )
+ return Error("load commands do not fit in __TEXT segment");
}
else {
return Error("missing __TEXT segment");
}
- (void)hasLINKEDIT;
// FIXME: LINKEDIT checks need to move to Analyzer
//if ( !hasLINKEDIT )
// return Error("missing __LINKEDIT segment");
}
// check for overlapping segments, by looking at every possible pair of segments
- const bool checkNames = isDyldManaged() && policy.enforceUniqueSegmentNames();
for ( const SegRange& r1 : ranges ) {
for ( const SegRange& r2 : ranges ) {
if ( &r1 == &r2 )
continue;
if ( r1.vm.overlaps(r2.vm) )
- return Error("vm range of segment '%s' overlaps segment '%s'", r1.name.c_str(), r2.name.c_str());
- // can't compare file offsets for segments in dyld cache because they may be offsets into different files
- if ( !this->inDyldCache() && r1.file.overlaps(r2.file) )
- return Error("file range of segment '%s' overlaps segment '%s'", r1.name.c_str(), r2.name.c_str());
- if ( checkNames && (r1.name == r2.name) )
- return Error("duplicate segment name '%s'", r1.name.c_str());
+ return Error("vm range of segment '%s' overlaps segment '%s'", r1.name, r2.name);
+ if ( r1.file.overlaps(r2.file) )
+ return Error("file range of segment '%s' overlaps segment '%s'", r1.name, r2.name);
}
}
// check segment load command order matches file content order which matches vm order
// skip dyld cache because segments are moved around too much
- if ( policy.enforceSegmentOrderMatchesLoadCmds() && !inDyldCache() && (ranges.count() > 1) ) {
- for (int i=1; i < ranges.count()-1; ++i) {
- const SegRange& a = ranges[i-1];
- const SegRange& b = ranges[i];
- if ( (b.file.start < a.file.start) && (b.file.start != b.file.end) )
- return Error("segment '%s' file offset out of order", a.name.c_str());
- if ( b.vm.start < a.vm.start ) {
- if ( isFileSet() && (b.name == "__PRELINK_INFO") ) {
- // __PRELINK_INFO may have no vmaddr set
- } else if ( arch().usesx86_64Instructions() && isDynamicExecutable() && !isPIE() ) {
- // rdar://149897776 (allow out of VM address order segments on legacy x86 binaries)
- } else {
- return Error("segment '%s' vm address out of order", b.name.c_str());
+ if ( policy.enforceSegmentOrderMatchesLoadCmds() && !inDyldCache() ) {
+ const SegRange* last = nullptr;
+ for ( const SegRange& r : ranges ) {
+ if ( last != nullptr ) {
+ if ( (r.file.start < last->file.start) && (r.file.start != r.file.end) )
+ return Error("segment '%s' file offset out of order", r.name);
+ if ( r.vm.start < last->vm.start ) {
+ if ( isFileSet() && (strcmp(r.name, "__PRELINK_INFO") == 0) ) {
+ // __PRELINK_INFO may have no vmaddr set
+ }
+ else {
+ return Error("segment '%s' vm address out of order", r.name);
+ }
}
}
+ last = &r;
}
}
@@ -1098,14 +988,6 @@
return !hasLoadCommand(LC_LOAD_DYLINKER);
}
-bool Header::isDylinker() const {
- if ( mh.filetype != MH_DYLINKER ) {
- return false;
- }
- return true;
-}
-
-
//
// MARK: --- methods that read Platform load commands ---
//
@@ -1153,26 +1035,24 @@
break;
}
});
-
- if ( foundPlatform )
+#ifdef BUILDING_MACHO_WRITER
+ // no implicit platforms in static linker
+ // but for object files only, we need to support linking against old macos dylibs
+ if ( isObjectFile() )
return;
-
- if ( !gHeaderAddImplicitPlatform ) {
- // no implicit platforms in static linker
- // but for object files and -preload files only, we need to support linking against old macos dylibs
- if ( isObjectFile() || isPreload() || isKextBundle() || isStaticExecutable() )
- return;
- }
-
- // old binary with no explicit platform
+#endif
+
+ if ( !foundPlatform ) {
+ // old binary with no explicit platform
#if TARGET_OS_OSX
- if ( (mh.cputype == CPU_TYPE_X86_64) || (mh.cputype == CPU_TYPE_I386) )
- handler(Platform::macOS, Version32(10, 5), Version32(10, 5)); // guess it is a macOS 10.5 binary
- // <rdar://problem/75343399>
- // The Go linker emits non-standard binaries without a platform and we have to live with it.
- if ( mh.cputype == CPU_TYPE_ARM64 )
- handler(Platform::macOS, Version32(11, 0), Version32(11, 0)); // guess it is a macOS 11.0 binary
+ if ( (mh.cputype == CPU_TYPE_X86_64) | (mh.cputype == CPU_TYPE_I386) )
+ handler(Platform::macOS, Version32(10, 5), Version32(10, 5)); // guess it is a macOS 10.5 binary
+ // <rdar://problem/75343399>
+ // The Go linker emits non-standard binaries without a platform and we have to live with it.
+ if ( mh.cputype == CPU_TYPE_ARM64 )
+ handler(Platform::macOS, Version32(11, 0), Version32(11, 0)); // guess it is a macOS 11.0 binary
#endif
+ }
}
bool Header::builtForPlatform(Platform reqPlatform, bool onlyOnePlatform) const
@@ -1193,29 +1073,10 @@
return match;
}
-bool Header::builtForSimulator() const {
- return platformAndVersions().platform.isSimulator();
-}
-
-void Header::forEachBuildTool(void (^handler)(Platform platform, uint32_t tool, uint32_t version)) const
-{
- forEachLoadCommandSafe(^(const load_command* cmd, bool &stop) {
- switch ( cmd->cmd ) {
- case LC_BUILD_VERSION: {
- const build_version_command* buildCmd = (build_version_command *)cmd;
- for ( uint32_t i = 0; i != buildCmd->ntools; ++i ) {
- uint32_t offset = sizeof(build_version_command) + (i * sizeof(build_tool_version));
- if ( offset >= cmd->cmdsize )
- break;
-
- const build_tool_version* firstTool = (const build_tool_version*)(&buildCmd[1]);
- handler(Platform(buildCmd->platform), firstTool[i].tool, firstTool[i].version);
- }
- }
- }
- });
-}
-
+bool Header::isZippered() const
+{
+ return platformAndVersions().platform == Platform::zippered;
+}
bool Header::allowsAlternatePlatform() const
{
@@ -1243,7 +1104,7 @@
{
__block bool found = false;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_ID_DYLIB || cmd->cmd == LC_ID_DYLINKER) {
+ if ( cmd->cmd == LC_ID_DYLIB ) {
const dylib_command* dylibCmd = (dylib_command*)cmd;
*compatVersion = Version32(dylibCmd->dylib.compatibility_version);
*currentVersion = Version32(dylibCmd->dylib.current_version);
@@ -1271,23 +1132,8 @@
return found;
}
-bool Header::sourceVersion(Version64 &version) const
-{
- __block bool found = false;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_SOURCE_VERSION ) {
- const source_version_command* svc = (const source_version_command*)cmd;
- version = Version64(svc->version);
- found = true;
- stop = true;
- }
- });
-
- return found;
-}
-
-
-const char* Header::linkedDylibLoadPath(uint32_t depIndex) const
+
+const char* Header::dependentDylibLoadPath(uint32_t depIndex) const
{
__block uint32_t curIndex = 0;
__block const char* result = nullptr;
@@ -1307,14 +1153,14 @@
return result;
}
-uint32_t Header::linkedDylibCount(bool* allDepsAreNormal) const
+uint32_t Header::dependentDylibCount(bool* allDepsAreNormal) const
{
if ( allDepsAreNormal != nullptr )
*allDepsAreNormal = true;
__block unsigned count = 0;
- this->forEachLinkedDylib(^(const char* loadPath, LinkedDylibAttributes kind, Version32 , Version32 , bool , bool& stop) {
+ this->forEachDependentDylib(^(const char* loadPath, DependentDylibAttributes kind, Version32 , Version32 , bool& stop) {
if ( allDepsAreNormal != nullptr ) {
- if ( kind != LinkedDylibAttributes::regular )
+ if ( kind != DependentDylibAttributes::regular )
*allDepsAreNormal = false; // record if any linkages were weak, re-export, upward, or delay-init
}
++count;
@@ -1322,9 +1168,9 @@
return count;
}
-LinkedDylibAttributes Header::loadCommandToDylibKind(const dylib_command* dylibCmd)
-{
- LinkedDylibAttributes attr;
+DependentDylibAttributes Header::loadCommandToDylibKind(const dylib_command* dylibCmd)
+{
+ DependentDylibAttributes attr;
const dylib_use_command* dylib2Cmd = (dylib_use_command*)dylibCmd;
if ( (dylib2Cmd->marker == 0x1a741800) && (dylib2Cmd->nameoff == sizeof(dylib_use_command)) ) {
attr.raw = (uint8_t)dylib2Cmd->flags;
@@ -1346,13 +1192,9 @@
assert(0 && "not a dylib load command");
}
-void Header::forEachLinkedDylib(void (^callback)(const char* loadPath, LinkedDylibAttributes kind,
- Version32 compatVersion, Version32 curVersion,
- bool synthesizedLink, bool& stop)) const
-{
- if ( this->isDylinker() )
- return;
-
+void Header::forEachDependentDylib(void (^callback)(const char* loadPath, DependentDylibAttributes kind,
+ Version32 compatVersion, Version32 curVersion, bool& stop)) const
+{
__block unsigned count = 0;
__block bool stopped = false;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
@@ -1363,7 +1205,7 @@
case LC_LOAD_UPWARD_DYLIB: {
const dylib_command* dylibCmd = (dylib_command*)cmd;
const char* loadPath = (char*)dylibCmd + dylibCmd->dylib.name.offset;
- callback(loadPath, loadCommandToDylibKind(dylibCmd), Version32(dylibCmd->dylib.compatibility_version), Version32(dylibCmd->dylib.current_version), false, stop);
+ callback(loadPath, loadCommandToDylibKind(dylibCmd), Version32(dylibCmd->dylib.compatibility_version), Version32(dylibCmd->dylib.current_version), stop);
++count;
if ( stop )
stopped = true;
@@ -1371,23 +1213,24 @@
}
}
});
-
+#if BUILDING_DYLD
// everything must link with something
if ( (count == 0) && !stopped ) {
// The dylibs that make up libSystem can link with nothing
// except for dylibs in libSystem.dylib which are ok to link with nothing (they are on bottom)
if ( this->builtForPlatform(Platform::driverKit, true) ) {
if ( !this->isDylib() || (strncmp(this->installName(), "/System/DriverKit/usr/lib/system/", 33) != 0) )
- callback("/System/DriverKit/usr/lib/libSystem.B.dylib", LinkedDylibAttributes::regular, Version32(1, 0), Version32(1, 0), true, stopped);
+ callback("/System/DriverKit/usr/lib/libSystem.B.dylib", DependentDylibAttributes::regular, Version32(1, 0), Version32(1, 0), stopped);
} else if ( this->platformAndVersions().platform.isExclaveKit() ) {
if ( !this->isDylib() || (strncmp(this->installName(), "/System/ExclaveKit/usr/lib/system/", 34) != 0) )
- callback("/System/ExclaveKit/usr/lib/libSystem.dylib", LinkedDylibAttributes::regular, Version32(1, 0), Version32(1, 0), true, stopped);
+ callback("/System/ExclaveKit/usr/lib/libSystem.dylib", DependentDylibAttributes::regular, Version32(1, 0), Version32(1, 0), stopped);
}
else {
if ( !this->isDylib() || (strncmp(this->installName(), "/usr/lib/system/", 16) != 0) )
- callback("/usr/lib/libSystem.B.dylib", LinkedDylibAttributes::regular, Version32(1, 0), Version32(1, 0), true, stopped);
- }
- }
+ callback("/usr/lib/libSystem.B.dylib", DependentDylibAttributes::regular, Version32(1, 0), Version32(1, 0), stopped);
+ }
+ }
+#endif
}
void Header::forDyldEnv(void (^callback)(const char* envVar, bool& stop)) const
@@ -1399,8 +1242,10 @@
// only process variables that start with DYLD_ and end in _PATH
if ( (strncmp(keyEqualsValue, "DYLD_", 5) == 0) ) {
const char* equals = strchr(keyEqualsValue, '=');
- if ( equals != nullptr ) {
- callback(keyEqualsValue, stop);
+ if ( equals != NULL ) {
+ if ( strncmp(&equals[-5], "_PATH", 5) == 0 ) {
+ callback(keyEqualsValue, stop);
+ }
}
}
}
@@ -1432,9 +1277,8 @@
}
break;
case CPU_TYPE_ARM64:
- case CPU_TYPE_ARM64_32:
if ( flavor == 6 ) { // ARM_THREAD_STATE64
- memcpy((uint32_t*)&addr, (uint32_t*)®s64[32], sizeof(uint64_t)); // arm_thread_state64_t.__pc
+ addr = regs64[32]; // arm_thread_state64_t.__pc
return true;
}
break;
@@ -1479,29 +1323,7 @@
stop = true;
}
});
-
- // <rdar://problem/13622786> ignore code signatures in macOS binaries built with pre-10.9 tools
- if ( mh.cputype == CPU_TYPE_X86_64 ) {
- PlatformAndVersions pvs = platformAndVersions();
- if ( (pvs.platform == Platform::macOS) && (pvs.sdk < Version32(10,9)) )
- return false;
- }
-
- return result;
-}
-
-bool Header::hasLinkerOptimizationHints(uint32_t& fileOffset, uint32_t& size) const
-{
- __block bool result = false;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_LINKER_OPTIMIZATION_HINT ) {
- linkedit_data_command* sigCmd = (linkedit_data_command*)cmd;
- fileOffset = sigCmd->dataoff;
- size = sigCmd->datasize;
- result = true;
- stop = true;
- }
- });
+ // FIXME: may need to ignore codesigs from pre 10.9 macOS binaries
return result;
}
@@ -1520,30 +1342,11 @@
return result;
}
-bool Header::hasClassicRelocations(uint32_t& nLocRel, uint32_t& nExtRel) const
+bool Header::hasSplitSegInfo() const
{
__block bool result = false;
- nLocRel = 0;
- nExtRel = 0;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_DYSYMTAB) {
- dysymtab_command* dySymCmd = (dysymtab_command*)cmd;
- nLocRel = dySymCmd->nlocrel;
- nExtRel = dySymCmd->nextrel;
- result = (nLocRel != 0 || nExtRel != 0);
- stop = true;
- }
- });
- return result;
-}
-
-bool Header::hasSplitSegInfo(bool& isSplitSegMarker) const
-{
- __block bool result = false;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
if ( cmd->cmd == LC_SEGMENT_SPLIT_INFO) {
- linkedit_data_command* sigCmd = (linkedit_data_command*)cmd;
- isSplitSegMarker = (sigCmd->datasize == 0);
result = true;
stop = true;
}
@@ -1566,741 +1369,6 @@
return result;
}
-bool Header::hasFunctionsVariantTable(uint64_t& runtimeOffset) const
-{
- __block uint32_t fileOffset = 0;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_FUNCTION_VARIANTS ) {
- const linkedit_data_command* leDataCmd = (linkedit_data_command*)cmd;
- fileOffset = leDataCmd->dataoff;
- stop = true;
- }
- });
- if ( fileOffset == 0 )
- return false;
-
- runtimeOffset = fileOffset + zerofillExpansionAmount();
- return true;
-}
-
-
-CString Header::libOrdinalName(int libOrdinal) const
-{
- switch ( libOrdinal) {
- case BIND_SPECIAL_DYLIB_SELF:
- return "<this-image>";
- case BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE:
- return "<main-executable>";
- case BIND_SPECIAL_DYLIB_FLAT_LOOKUP:
- return "<flat-namespace>";
- case BIND_SPECIAL_DYLIB_WEAK_LOOKUP:
- return "<weak-def-coalesce>";
- default:
- if ( (libOrdinal > 0) && (libOrdinal <= this->linkedDylibCount()) )
- return this->linkedDylibLoadPath(libOrdinal-1);
- break;
- }
- return "<invalid-lib-ordinal>";
-}
-
-const load_command* Header::findLoadCommand(uint32_t& index, bool (^predicate)(const load_command* lc)) const
-{
- index = 0;
- __block const load_command* lc = nullptr;
- __block uint32_t currentIndex = 0;
- forEachLoadCommandSafe(^(const load_command *cmd, bool &stop) {
- if ( predicate(cmd) ) {
- index = currentIndex;
- lc = cmd;
- stop = true;
- }
-
- ++currentIndex;
- });
-
- return lc;
-}
-
-void Header::findLoadCommandRange(uint32_t& index, uint32_t& endIndex, bool (^predicate)(const load_command* lc)) const
-{
- index = UINT32_MAX;
- endIndex = UINT32_MAX;
- __block uint32_t currentIndex = 0;
- forEachLoadCommandSafe(^(const load_command *cmd, bool &stop) {
- if ( predicate(cmd) ) {
- if ( index == UINT32_MAX ) { // first match, set indices
- index = currentIndex;
- endIndex = index+1;
- } else {
- assert(endIndex == currentIndex); // range must be contiguous
- ++endIndex;
- }
- } else if (index != UINT32_MAX) {
- // not a match, so stop looking if the first match had already been found
- stop = true;
- }
-
- ++currentIndex;
- });
-
- // clear index if none matched
- if ( index == UINT32_MAX ) {
- index = 0;
- endIndex = 0;
- }
-}
-
-
-const dylib_command* Header::isDylibLoadCommand(const load_command* lc)
-{
- switch (lc->cmd) {
- case LC_LOAD_DYLIB:
- case LC_LOAD_WEAK_DYLIB:
- case LC_LOAD_UPWARD_DYLIB:
- case LC_REEXPORT_DYLIB:
- return (dylib_command*)lc;
- default:
- return nullptr;
- }
-}
-
-uint32_t Header::sizeForLinkedDylibCommand(const char *path, LinkedDylibAttributes depAttrs, uint32_t& traditionalCmd) const
-{
- traditionalCmd = 0;
- if ( depAttrs == LinkedDylibAttributes::regular )
- traditionalCmd = LC_LOAD_DYLIB;
- else if ( depAttrs == LinkedDylibAttributes::justWeakLink )
- traditionalCmd = LC_LOAD_WEAK_DYLIB;
- else if ( depAttrs == LinkedDylibAttributes::justUpward )
- traditionalCmd = LC_LOAD_UPWARD_DYLIB;
- else if ( depAttrs == LinkedDylibAttributes::justReExport )
- traditionalCmd = LC_REEXPORT_DYLIB;
-
- if ( traditionalCmd )
- return pointerAligned((uint32_t)(sizeof(dylib_command) + strlen(path) + 1));
-
- // use new style load command
- return pointerAligned((uint32_t)(sizeof(dylib_use_command) + strlen(path) + 1));
-}
-
-
-const thread_command* Header::unixThreadLoadCommand() const {
- __block const thread_command* command = nullptr;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_UNIXTHREAD ) {
- command = (const thread_command*)cmd;
- stop = true;
- }
- });
- return command;
-}
-
-
-const char* Header::protectionString(uint32_t flags, char str[8])
-{
- str[0] = (flags & VM_PROT_READ) ? 'r' : '.';
- str[1] = (flags & VM_PROT_WRITE) ? 'w' : '.';
- str[2] = (flags & VM_PROT_EXECUTE) ? 'x' : '.';
- str[3] = '\0';
- return str;
-}
-
-static const char* sectionAttributes(uint32_t sectFlags)
-{
- if ( sectFlags == 0 )
- return "";
-
- switch ( sectFlags & SECTION_TYPE ) {
- case S_ZEROFILL:
- return "S_ZEROFILL";
- case S_CSTRING_LITERALS:
- return "S_CSTRING_LITERALS";
- case S_NON_LAZY_SYMBOL_POINTERS:
- return "S_NON_LAZY_SYMBOL_POINTERS";
- case S_THREAD_LOCAL_VARIABLES:
- return "S_THREAD_LOCAL_VARIABLES";
- case S_INIT_FUNC_OFFSETS:
- return "S_INIT_FUNC_OFFSETS";
- case S_SYMBOL_STUBS:
- return "S_SYMBOL_STUBS";
- }
-
- if ( sectFlags == S_ATTR_PURE_INSTRUCTIONS )
- return "S_ATTR_PURE_INSTRUCTIONS";
- if ( sectFlags == (S_ATTR_PURE_INSTRUCTIONS|S_ATTR_SOME_INSTRUCTIONS) )
- return "S_ATTR_PURE_INSTRUCTIONS|S_ATTR_SOME_INSTRUCTIONS";
-
- return "";
-}
-
-void Header::printLoadCommands(FILE* out, unsigned indentLevel) const
-{
- char indentBuffer[indentLevel+2];
- for (unsigned i=0; i < indentLevel; ++i)
- indentBuffer[i] = ' ';
- indentBuffer[indentLevel] = '\0';
- const char* indent = indentBuffer;
- __block uint32_t lcIndex = 0;
- this->forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- fprintf(out, "%sLoad command #%d\n", indent, lcIndex);
- const dylib_command* dylibCmd;
- const segment_command* seg32Cmd;
- const segment_command_64* seg64Cmd;
- const linkedit_data_command* leDataCmd;
- const symtab_command* symTabCmd;
- const dysymtab_command* dynSymCmd;
- const uuid_command* uuidCmd;
- const version_min_command* versMinCmd;
- const build_version_command* buildVerCmd;
- const rpath_command* rpathCmd;
- const dylinker_command* dyldEnvCmd;
- const entry_point_command* mainCmd;
- const sub_client_command* subClientCmd;
- const routines_command* inits32Cmd;
- const routines_command_64* inits64Cmd;
- const encryption_info_command* encrypt32Cmd;
- const encryption_info_command_64* encrypt64Cmd;
- const dyld_info_command* dyldInfoCmd;
- const target_triple_command* tripleCmd;
- char versStr[64];
- char maxProtStr[8];
- char initProtStr[8];
- char linkAttrStr[64];
- uuid_string_t uuidStr;
- const section_64* sections64;
- const section* sections32;
- LinkedDylibAttributes linkAttrs;
- const uint8_t* bytes;
- const uint32_t* words;
- uint64_t vers64;
- switch (cmd->cmd) {
- case LC_SEGMENT:
- seg32Cmd = (segment_command*)cmd;
- fprintf(out, "%s cmd: LC_SEGMENT\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s segname: \"%.*s\"\n", indent, (int)name16(seg32Cmd->segname).size(), name16(seg32Cmd->segname).data());
- fprintf(out, "%s vmaddr: 0x%08X\n", indent, seg32Cmd->vmaddr);
- fprintf(out, "%s vmsize: 0x%08X\n", indent, seg32Cmd->vmsize);
- fprintf(out, "%s fileoff: 0x%08X\n", indent, seg32Cmd->fileoff);
- fprintf(out, "%s filesize: 0x%08X\n", indent, seg32Cmd->filesize);
- fprintf(out, "%s maxprot: %s\n", indent, Header::protectionString(seg32Cmd->maxprot, maxProtStr));
- fprintf(out, "%s initprot: %s\n", indent, Header::protectionString(seg32Cmd->initprot, initProtStr));
- if ( seg32Cmd->flags & SG_READ_ONLY )
- fprintf(out, "%s flags: SG_READ_ONLY\n",indent);
- fprintf(out, "%s nsects: %d\n", indent, seg32Cmd->nsects);
- sections32 = (section*)((char*)seg32Cmd + sizeof(struct segment_command));
- for (int i=0; i < seg32Cmd->nsects; ++i) {
- fprintf(out, "%s sections[%d].sectname: \"%.*s\"\n", indent, i, (int)name16(sections32[i].sectname).size(), name16(sections32[i].sectname).data());
- fprintf(out, "%s sections[%d].addr: 0x%08X\n", indent, i, sections32[i].addr);
- fprintf(out, "%s sections[%d].size: 0x%08X\n", indent, i, sections32[i].size);
- if ( sections32[i].offset != 0 )
- fprintf(out, "%s sections[%d].offset: 0x%08X\n", indent, i, sections32[i].offset);
- fprintf(out, "%s sections[%d].align: 2^%d\n", indent, i, sections32[i].align);
- if ( sections32[i].flags != 0 )
- fprintf(out, "%s sections[%d].type: %s\n", indent, i, sectionAttributes(sections32[i].flags));
- if ( sections32[i].reserved1 != 0 )
- fprintf(out, "%s sections[%d].reserved1: %d\n", indent, i, sections32[i].reserved1);
- if ( sections32[i].reserved2 != 0 )
- fprintf(out, "%s sections[%d].reserved2: %d\n", indent, i, sections32[i].reserved2);
- }
- break;
- case LC_SYMTAB:
- symTabCmd = (symtab_command*)cmd;
- fprintf(out, "%s cmd: LC_SYMTAB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s symoff: 0x%X\n", indent, symTabCmd->symoff);
- fprintf(out, "%s nsyms: %d\n", indent, symTabCmd->nsyms);
- fprintf(out, "%s stroff: 0x%X\n", indent, symTabCmd->stroff);
- fprintf(out, "%s strsize: 0x%X\n", indent, symTabCmd->strsize);
- break;
- case LC_UNIXTHREAD:
- words = (uint32_t*)cmd;
- fprintf(out, "%s cmd: LC_UNIXTHREAD\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- if ( words[2] == 6 ) { // ARM_THREAD_STATE64
- fprintf(out, "%s pc: 0x%llX\n", indent, *(uint64_t*)(&words[68]));
- }
- else if ( words[2] == 4 ) { // x86_THREAD_STATE64
- fprintf(out, "%s pc: 0x%llX\n", indent, *(uint64_t*)(&words[36]));
- }
- else if ( words[2] == 1 ) { // x86_THREAD_STATE
- fprintf(out, "%s pc: 0x%X\n", indent, words[14]);
- }
- break;
- case LC_DYSYMTAB:
- dynSymCmd = (dysymtab_command*)cmd;
- fprintf(out, "%s cmd: LC_DYSYMTAB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s ilocalsym: %d\n", indent, dynSymCmd->ilocalsym);
- fprintf(out, "%s nlocalsym: %d\n", indent, dynSymCmd->nlocalsym);
- fprintf(out, "%s iextdefsym: %d\n", indent, dynSymCmd->iextdefsym);
- fprintf(out, "%s nextdefsym: %d\n", indent, dynSymCmd->nextdefsym);
- fprintf(out, "%s iundefsym: %d\n", indent, dynSymCmd->iundefsym);
- fprintf(out, "%s nundefsym: %d\n", indent, dynSymCmd->nundefsym);
- fprintf(out, "%s indirectsymoff: 0x%08X\n", indent, dynSymCmd->indirectsymoff);
- fprintf(out, "%s nindirectsyms: %d\n", indent, dynSymCmd->nindirectsyms);
- fprintf(out, "%s ilocalsym: %d\n", indent, dynSymCmd->ilocalsym);
- break;
- case LC_LOAD_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- linkAttrs = loadCommandToDylibKind(dylibCmd);
- fprintf(out, "%s cmd: LC_LOAD_DYLIB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- if ( linkAttrs.raw != 0 ) {
- linkAttrs.toString(linkAttrStr);
- fprintf(out, "%s attrs: %s\n", indent, linkAttrStr);
- }
- fprintf(out, "%s cur-vers: %s\n", indent, Version32(dylibCmd->dylib.current_version).toString(versStr));
- fprintf(out, "%s compat-vers: %s\n", indent, Version32(dylibCmd->dylib.compatibility_version).toString(versStr));
- break;
- case LC_ID_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_ID_DYLIB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- fprintf(out, "%s cur-vers: %s\n", indent, Version32(dylibCmd->dylib.current_version).toString(versStr));
- fprintf(out, "%s compat-vers: %s\n", indent, Version32(dylibCmd->dylib.compatibility_version).toString(versStr));
- break;
- case LC_LOAD_DYLINKER:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_LOAD_DYLINKER\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- break;
- case LC_ID_DYLINKER:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_ID_DYLINKER\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- break;
- case LC_ROUTINES:
- inits32Cmd = (routines_command*)cmd;
- fprintf(out, "%s cmd: LC_ROUTINES\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s init_address: 0x%X\n", indent, inits32Cmd->init_address);
- break;
- case LC_SUB_FRAMEWORK:
- subClientCmd = (sub_client_command*)cmd;
- fprintf(out, "%s cmd: LC_SUB_FRAMEWORK\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s umbrella: \"%s\"\n", indent, (char*)subClientCmd + subClientCmd->client.offset);
- break;
- case LC_SUB_UMBRELLA:
- subClientCmd = (sub_client_command*)cmd;
- fprintf(out, "%s cmd: LC_SUB_UMBRELLA\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s sub_umbrella: \"%s\"\n", indent, (char*)subClientCmd + subClientCmd->client.offset);
- break;
- case LC_SUB_CLIENT:
- subClientCmd = (sub_client_command*)cmd;
- fprintf(out, "%s cmd: LC_SUB_CLIENT\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s client: \"%s\"\n", indent, (char*)subClientCmd + subClientCmd->client.offset);
- break;
- case LC_SUB_LIBRARY:
- subClientCmd = (sub_client_command*)cmd;
- fprintf(out, "%s cmd: LC_SUB_LIBRARY\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s sub_library: \"%s\"\n", indent, (char*)subClientCmd + subClientCmd->client.offset);
- break;
- case LC_LOAD_WEAK_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_LOAD_WEAK_DYLIB\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- fprintf(out, "%s cur-vers: %s\n", indent, Version32(dylibCmd->dylib.current_version).toString(versStr));
- fprintf(out, "%s compat-vers: %s\n", indent, Version32(dylibCmd->dylib.compatibility_version).toString(versStr));
- break;
- case LC_SEGMENT_64:
- seg64Cmd = (segment_command_64*)cmd;
- fprintf(out, "%s cmd: LC_SEGMENT_64\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s segname: \"%.*s\"\n", indent, (int)name16(seg64Cmd->segname).size(), name16(seg64Cmd->segname).data());
- fprintf(out, "%s vmaddr: 0x%016llX\n", indent, seg64Cmd->vmaddr);
- fprintf(out, "%s vmsize: 0x%016llX\n", indent, seg64Cmd->vmsize);
- fprintf(out, "%s fileoff: 0x%08llX\n", indent, seg64Cmd->fileoff);
- fprintf(out, "%s filesize: 0x%08llX\n", indent, seg64Cmd->filesize);
- fprintf(out, "%s maxprot: %s\n", indent, Header::protectionString(seg64Cmd->initprot, maxProtStr));
- fprintf(out, "%s initprot: %s\n", indent, Header::protectionString(seg64Cmd->initprot, initProtStr));
- if ( seg64Cmd->flags & SG_READ_ONLY )
- fprintf(out, "%s flags: SG_READ_ONLY\n",indent);
- fprintf(out, "%s nsects: %d\n", indent, seg64Cmd->nsects);
- sections64 = (section_64*)((char*)seg64Cmd + sizeof(struct segment_command_64));
- for (int i=0; i < seg64Cmd->nsects; ++i) {
- fprintf(out, "%s sections[%d].sectname: \"%.*s\"\n", indent, i, (int)name16(sections64[i].sectname).size(), name16(sections64[i].sectname).data());
- fprintf(out, "%s sections[%d].addr: 0x%016llX\n", indent, i, sections64[i].addr);
- fprintf(out, "%s sections[%d].size: 0x%016llX\n", indent, i, sections64[i].size);
- if ( sections64[i].offset != 0 )
- fprintf(out, "%s sections[%d].offset: 0x%08X\n", indent, i, sections64[i].offset);
- fprintf(out, "%s sections[%d].align: 2^%d\n", indent, i, sections64[i].align);
- if ( sections64[i].flags != 0 )
- fprintf(out, "%s sections[%d].type: %s\n", indent, i, sectionAttributes(sections64[i].flags));
- if ( sections64[i].reserved1 != 0 )
- fprintf(out, "%s sections[%d].reserved1: %d\n", indent, i, sections64[i].reserved1);
- if ( sections64[i].reserved2 != 0 )
- fprintf(out, "%s sections[%d].reserved2: %d\n", indent, i, sections64[i].reserved2);
- }
- break;
- case LC_ROUTINES_64:
- inits64Cmd = (routines_command_64*)cmd;
- fprintf(out, "%s cmd: LC_ROUTINES\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s init_address: 0x%llX\n", indent, inits64Cmd->init_address);
- break;
- case LC_UUID:
- uuidCmd = (uuid_command*)cmd;
- uuid_unparse_upper(uuidCmd->uuid, uuidStr);
- fprintf(out, "%s cmd: LC_UUID\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s uuid: %s\n", indent, uuidStr);
- break;
- case LC_RPATH:
- rpathCmd = (rpath_command*)cmd;
- fprintf(out, "%s cmd: LC_RPATH\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s rpath:\"%s\"\n", indent, (char*)cmd + rpathCmd->path.offset);
- break;
- case LC_CODE_SIGNATURE:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_CODE_SIGNATURE\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_SEGMENT_SPLIT_INFO:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_SEGMENT_SPLIT_INFO\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_REEXPORT_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_REEXPORT_DYLIB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- fprintf(out, "%s cur-vers: %s\n", indent, Version32(dylibCmd->dylib.current_version).toString(versStr));
- fprintf(out, "%s compat-vers: %s\n", indent, Version32(dylibCmd->dylib.compatibility_version).toString(versStr));
- break;
- case LC_ENCRYPTION_INFO:
- encrypt32Cmd = (encryption_info_command*)cmd;
- fprintf(out, "%s cmd: LC_ENCRYPTION_INFO\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s cryptoff: 0x%X\n", indent, encrypt32Cmd->cryptoff);
- fprintf(out, "%s cryptsize: 0x%X\n", indent, encrypt32Cmd->cryptsize);
- fprintf(out, "%s cryptid: 0x%X\n", indent, encrypt32Cmd->cryptid);
- break;
- case LC_DYLD_INFO:
- case LC_DYLD_INFO_ONLY:
- dyldInfoCmd = (dyld_info_command*)cmd;
- fprintf(out, "%s cmd: LC_DYLD_INFO%s\n", indent, (cmd->cmd == LC_DYLD_INFO_ONLY ? "_ONLY" : ""));
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s rebase_off: 0x%X\n", indent, dyldInfoCmd->rebase_off);
- fprintf(out, "%s rebase_size: 0x%X\n", indent, dyldInfoCmd->rebase_size);
- fprintf(out, "%s bind_off: 0x%X\n", indent, dyldInfoCmd->bind_off);
- fprintf(out, "%s bind_size: 0x%X\n", indent, dyldInfoCmd->bind_size);
- fprintf(out, "%s weak_bind_off: 0x%X\n", indent, dyldInfoCmd->weak_bind_off);
- fprintf(out, "%s weak_bind_size: 0x%X\n", indent, dyldInfoCmd->weak_bind_size);
- fprintf(out, "%s lazy_bind_off: 0x%X\n", indent, dyldInfoCmd->lazy_bind_off);
- fprintf(out, "%s lazy_bind_size: 0x%X\n", indent, dyldInfoCmd->lazy_bind_size);
- fprintf(out, "%s export_off: 0x%X\n", indent, dyldInfoCmd->export_off);
- fprintf(out, "%s export_size: 0x%X\n", indent, dyldInfoCmd->export_size);
- break;
- case LC_LOAD_UPWARD_DYLIB:
- dylibCmd = (dylib_command*)cmd;
- fprintf(out, "%s cmd: LC_LOAD_UPWARD_DYLIB\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name: \"%s\"\n", indent, (char*)dylibCmd + dylibCmd->dylib.name.offset);
- fprintf(out, "%s cur-vers: %s\n", indent, Version32(dylibCmd->dylib.current_version).toString(versStr));
- fprintf(out, "%s compat-vers: %s\n", indent, Version32(dylibCmd->dylib.compatibility_version).toString(versStr));
- break;
- case LC_VERSION_MIN_MACOSX:
- versMinCmd = (version_min_command*)cmd;
- fprintf(out, "%s cmd: LC_VERSION_MIN_MACOSX\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s min-OS: %s\n", indent, Version32(versMinCmd->version).toString(versStr));
- fprintf(out, "%s sdk: %s\n", indent, Version32(versMinCmd->sdk).toString(versStr));
- break;
- case LC_VERSION_MIN_IPHONEOS:
- versMinCmd = (version_min_command*)cmd;
- fprintf(out, "%s cmd: LC_VERSION_MIN_IPHONEOS\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s min-OS: %s\n", indent, Version32(versMinCmd->version).toString(versStr));
- fprintf(out, "%s sdk: %s\n", indent, Version32(versMinCmd->sdk).toString(versStr));
- break;
- case LC_FUNCTION_STARTS:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_FUNCTION_STARTS\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_DYLD_ENVIRONMENT:
- dyldEnvCmd = (dylinker_command*)cmd;
- fprintf(out, "%s cmd: LC_DYLD_ENVIRONMENT\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s name:\"%s\"\n", indent, (char*)dyldEnvCmd + dyldEnvCmd->name.offset);
- break;
- case LC_MAIN:
- mainCmd = (entry_point_command*)cmd;
- fprintf(out, "%s cmd: LC_MAIN\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s entryoff: 0x%llX\n", indent, mainCmd->entryoff);
- if ( mainCmd->stacksize != 0 )
- fprintf(out, "%s stacksize: 0x%llX\n", indent, mainCmd->stacksize);
- break;
- case LC_DATA_IN_CODE:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_DATA_IN_CODE\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_SOURCE_VERSION:
- memcpy(&vers64, ((uint8_t*)cmd)+8, 8); // in 32-bit arches load command may not be 8-byte aligned, so can't use source_version_command.version.
- fprintf(out, "%s cmd: LC_SOURCE_VERSION\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s version: %s\n", indent, Version64(vers64).toString(versStr));
- break;
- case LC_ENCRYPTION_INFO_64:
- encrypt64Cmd = (encryption_info_command_64*)cmd;
- fprintf(out, "%s cmd: LC_ENCRYPTION_INFO\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s cryptoff: 0x%X\n", indent, encrypt64Cmd->cryptoff);
- fprintf(out, "%s cryptsize: 0x%X\n", indent, encrypt64Cmd->cryptsize);
- fprintf(out, "%s cryptid: 0x%X\n", indent, encrypt64Cmd->cryptid);
- break;
- case LC_VERSION_MIN_TVOS:
- versMinCmd = (version_min_command*)cmd;
- fprintf(out, "%s cmd: LC_VERSION_MIN_TVOS\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s min-OS: %s\n", indent, Version32(versMinCmd->version).toString(versStr));
- fprintf(out, "%s sdk: %s\n", indent, Version32(versMinCmd->sdk).toString(versStr));
- break;
- case LC_VERSION_MIN_WATCHOS:
- versMinCmd = (version_min_command*)cmd;
- fprintf(out, "%s cmd: LC_VERSION_MIN_WATCHOS\n",indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s min-OS: %s\n", indent, Version32(versMinCmd->version).toString(versStr));
- fprintf(out, "%s sdk: %s\n", indent, Version32(versMinCmd->sdk).toString(versStr));
- break;
- case LC_BUILD_VERSION:
- buildVerCmd = (build_version_command*)cmd;
- fprintf(out, "%s cmd: LC_BUILD_VERSION\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s platform: %s\n", indent, Platform(buildVerCmd->platform).name().c_str());
- fprintf(out, "%s min-OS: %s\n", indent, Version32(buildVerCmd->minos).toString(versStr));
- fprintf(out, "%s sdk: %s\n", indent, Version32(buildVerCmd->sdk).toString(versStr));
- if ( buildVerCmd->ntools != 0 ) {
- const build_tool_version* toolVersions = (build_tool_version*)((uint8_t*)cmd + sizeof(build_version_command));
- for (uint32_t i=0; i < buildVerCmd->ntools; ++i ) {
- const char* toolName = "unknown";
- switch ( toolVersions[i].tool ) {
- case TOOL_CLANG:
- toolName = "clang";
- break;
- case TOOL_SWIFT:
- toolName = "swiftc";
- break;
- case TOOL_LD:
- toolName = "ld";
- break;
- case TOOL_LLD:
- toolName = "lld";
- break;
- }
- fprintf(out, "%s tool[%d].name: %s\n", indent, i, toolName);
- fprintf(out, "%s tool[%d].version: %s\n", indent, i, Version32(toolVersions[i].version).toString(versStr));
- }
- }
- break;
- case LC_DYLD_EXPORTS_TRIE:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_DYLD_EXPORTS_TRIE\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_DYLD_CHAINED_FIXUPS:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_DYLD_CHAINED_FIXUPS\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_FUNCTION_VARIANTS:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_FUNCTION_VARIANTS\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_FUNCTION_VARIANT_FIXUPS:
- leDataCmd = (linkedit_data_command*)cmd;
- fprintf(out, "%s cmd: LC_FUNCTION_VARIANT_FIXUPS\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s dataoff: 0x%X\n", indent, leDataCmd->dataoff);
- fprintf(out, "%s datasize: 0x%X\n", indent, leDataCmd->datasize);
- break;
- case LC_TARGET_TRIPLE:
- tripleCmd = (target_triple_command*)cmd;
- fprintf(out, "%s cmd: LC_TARGET_TRIPLE\n", indent);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s triple:\"%s\"\n", indent, (char*)cmd + tripleCmd->triple.offset);
- break;
- default:
- bytes = (uint8_t*)cmd + 8;
- fprintf(out, "%s cmd: 0x%X\n", indent, cmd->cmd);
- fprintf(out, "%s cmdsize: 0x%X\n", indent, cmd->cmdsize);
- fprintf(out, "%s bytes: ", indent);
- for (int i=0; i < cmd->cmdsize; ++i) {
- if ( ((i & 0xF) == 0) && (i != 0) )
- fprintf(out, "%s ", indent);
- fprintf(out, "%02X ", bytes[i]);
- if ( (i & 0xF) == 0xF )
- fprintf(out, "\n");
- }
- if ( (cmd->cmdsize & 0xF) != 0x0 )
- fprintf(out, "\n");
- break;
- }
- ++lcIndex;
- });
-
-
-}
-
-bool Header::loadableIntoProcess(Platform processPlatform, CString path, bool internalInstall) const
-{
- if ( this->builtForPlatform(processPlatform) )
- return true;
-
- // Some host macOS dylibs can be loaded into simulator processes
- if (processPlatform.isSimulator() && this->builtForPlatform(Platform::macOS)) {
- static constinit CString const macOSHost[] = {
- "/usr/lib/system/libsystem_kernel.dylib",
- "/usr/lib/system/libsystem_platform.dylib",
- "/usr/lib/system/libsystem_pthread.dylib",
- "/usr/lib/system/libsystem_platform_debug.dylib",
- "/usr/lib/system/libsystem_pthread_debug.dylib",
- "/usr/lib/system/host/liblaunch_sim.dylib",
- };
- if ( std::ranges::any_of(macOSHost, [&](const CString& libPath) { return libPath == path; }) ) {
- return true;
- }
- }
-
- // If this is being called on main executable where we expect a macOS program, Catalyst programs are also runnable
- if ( this->isMainExecutable() && (processPlatform == Platform::macOS) && this->builtForPlatform(Platform::macCatalyst, true) )
- return true;
-#if (TARGET_OS_OSX && TARGET_CPU_ARM64)
- if ( this->isMainExecutable() && (processPlatform == Platform::macOS) && this->builtForPlatform(Platform::iOS, true) )
- return true;
-#endif
-
- // allow iOS executables to use visionOS dylibs
- if ( (processPlatform == Platform::iOS) && this->builtForPlatform(Platform::visionOS, true) )
- return true;
-
- // allow iOS_Sim executables to use visionOS_Sim dylibs
- if ( (processPlatform == Platform::iOS_simulator) && this->builtForPlatform(Platform::visionOS_simulator, true) )
- return true;
-
- bool iOSonMac = (processPlatform == Platform::macCatalyst);
-#if (TARGET_OS_OSX && TARGET_CPU_ARM64)
- // allow iOS binaries in iOSApp
- if ( processPlatform == Platform::iOS ) {
- // can load Catalyst binaries into iOS process
- if ( this->builtForPlatform(Platform::macCatalyst) )
- return true;
- iOSonMac = true;
- }
-#endif
- // macOS dylibs can be loaded into iOSMac processes
- if ( iOSonMac && this->builtForPlatform(Platform::macOS, true) )
- return true;
-
- return false;
-}
-
-bool Header::hasPlusLoadMethod() const
-{
- __block bool result = false;
- // in new objc runtime compiler puts classes/categories with +load method in specical section
- forEachSection(^(const Header::SectionInfo& info, bool& stop) {
- if ( !info.segmentName.starts_with("__DATA") )
- return;
- if ( (info.sectionName == "__objc_nlclslist") || (info.sectionName == "__objc_nlcatlist") ) {
- result = true;
- stop = true;
- }
- });
- return result;
-}
-
-// returns empty string if no triple specified
-CString Header::targetTriple() const
-{
- __block CString result;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_TARGET_TRIPLE ) {
- const char* targetTriple = (char*)cmd + ((struct target_triple_command*)cmd)->triple.offset;
- result = targetTriple;
- }
- });
- return result;
-}
-
-void Header::forEachSingletonPatch(void (^handler)(uint64_t runtimeOffset)) const
-{
- uint32_t ptrSize = pointerSize();
- uint32_t elementSize = (2 * ptrSize);
- uint64_t loadAddress = preferredLoadAddress();
- forEachSection(^(const SectionInfo §Info, bool &stop) {
- if ( sectInfo.sectionName != "__const_cfobj2" )
- return;
- stop = true;
-
- if ( (sectInfo.size % elementSize) != 0 ) {
- return;
- }
-
- if ( sectInfo.reserved2 != elementSize ) {
- // The linker must have rejected one or more of the elements in the section, so
- // didn't set the reserved2 to let us patch
- return;
- }
-
- for ( uint64_t offset = 0; offset != sectInfo.size; offset += elementSize ) {
- uint64_t targetRuntimeOffset = (sectInfo.address + offset) - loadAddress;
- handler(targetRuntimeOffset);
- }
- });
-}
-
-bool Header::hasObjCMessageReferences() const {
- uint64_t sectionRuntimeOffset, sectionSize;
- return findObjCDataSection("__objc_msgrefs", sectionRuntimeOffset, sectionSize);
-}
-
-bool Header::findObjCDataSection(CString sectionName, uint64_t& sectionRuntimeOffset, uint64_t& sectionSize) const
-{
- uint64_t baseAddress = preferredLoadAddress();
-
- __block bool foundSection = false;
- forEachSection(^(const Header::SectionInfo& sectInfo, bool& stop) {
- if ( !sectInfo.segmentName.starts_with("__DATA") )
- return;
- if ( sectInfo.sectionName != sectionName )
- return;
- foundSection = true;
- sectionRuntimeOffset = sectInfo.address - baseAddress;
- sectionSize = sectInfo.size;
- stop = true;
- });
- return foundSection;
-}
uint32_t Header::segmentCount() const
{
@@ -2316,32 +1384,23 @@
return count;
}
-uint32_t Header::loadCommandsFreeSpace() const
-{
- __block uint32_t firstSectionFileOffset = UINT32_MAX;
- __block uint32_t firstSegmentFileOffset = UINT32_MAX;
- forEachSection(^(const SectionInfo& sectInfo, bool &stop) {
- firstSectionFileOffset = sectInfo.fileOffset;
- firstSegmentFileOffset = segmentFileOffset(sectInfo.segIndex);
- stop = true;
- });
-
- // no segment load commands yet, so explicit size limit
- if ( firstSegmentFileOffset == UINT32_MAX )
- return UINT32_MAX;
-
- uint32_t headerSize = (mh.magic == MH_MAGIC_64) ? sizeof(mach_header_64) : sizeof(mach_header);
- uint32_t existSpaceUsed = mh.sizeofcmds + headerSize;
- return firstSectionFileOffset - firstSegmentFileOffset - existSpaceUsed;
-}
-
uint64_t Header::preferredLoadAddress() const
{
__block uint64_t textVmAddr = 0;
- forEachSegment(^(const SegmentInfo &info, bool &stop) {
- if ( info.segmentName == "__TEXT" ) {
- textVmAddr = info.vmaddr;
- stop = true;
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == LC_SEGMENT_64 ) {
+ const segment_command_64* segCmd = (segment_command_64*)cmd;
+ if ( strcmp(segCmd->segname, "__TEXT") == 0 ) {
+ textVmAddr = segCmd->vmaddr;
+ stop = true;
+ }
+ }
+ else if ( cmd->cmd == LC_SEGMENT ) {
+ const segment_command* segCmd = (segment_command*)cmd;
+ if ( strcmp(segCmd->segname, "__TEXT") == 0 ) {
+ textVmAddr = segCmd->vmaddr;
+ stop = true;
+ }
}
});
return textVmAddr;
@@ -2370,25 +1429,10 @@
return result;
}
-bool Header::hasDiscontiguousSegments() const
-{
- uint64_t loadAddr = preferredLoadAddress();
- __block bool res = false;
- this->forEachSegment(^(const SegmentInfo& info, bool& stop) {
- if ( info.maxProt == 0 )
- return;
- if ( info.vmaddr < loadAddr ) {
- res = true;
- stop = true;
- }
- });
- return res;
-}
-
std::string_view Header::segmentName(uint32_t segIndex) const
{
- __block std::string_view result;
- __block uint32_t segCount = 0;
+ __block std::string_view result;
+ __block uint32_t segCount = 0;
this->forEachSegment(^(const SegmentInfo& info, bool& stop) {
if ( segIndex == segCount ) {
result = info.segmentName;
@@ -2399,236 +1443,65 @@
return result;
}
-uint64_t Header::segmentVmSize(uint32_t segIndex) const
-{
- __block uint64_t result = 0;
- __block uint32_t segCount = 0;
- this->forEachSegment(^(const SegmentInfo& info, bool& stop) {
- if ( segIndex == segCount ) {
- result = info.vmsize;
- stop = true;
- }
- ++segCount;
- });
- return result;
-}
-
-uint64_t Header::segmentVmAddr(uint32_t segIndex) const
-{
- __block uint64_t result = 0;
- __block uint32_t segCount = 0;
- this->forEachSegment(^(const SegmentInfo& info, bool& stop) {
- if ( segIndex == segCount ) {
- result = info.vmaddr;
- stop = true;
- }
- ++segCount;
- });
- return result;
-}
-
-uint32_t Header::segmentFileOffset(uint32_t segIndex) const
-{
- __block uint32_t result = 0;
- __block uint32_t segCount = 0;
- this->forEachSegment(^(const SegmentInfo& info, bool& stop) {
- if ( segIndex == segCount ) {
- result = info.fileOffset;
- stop = true;
- }
- ++segCount;
- });
- return result;
-}
-
-// LC_SEGMENT stores names as char[16] potentially without a null terminator.
-std::string_view Header::name16(const char name[16])
+// LC_SEGMENT stores names as char[16] potentially without a null terminator. This returns a string_view for the given name
+static std::string_view name16(const char name[16])
{
size_t length = strnlen(name, 16);
- if ( length < 16 )
- return std::string_view(name, length);
-
- return std::string_view(name, 16);
+ return std::string_view(name, length);
}
void Header::forEachSegment(void (^callback)(const SegmentInfo& infos, bool& stop)) const
{
- __block uint16_t segmentIndex = 0;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
if ( cmd->cmd == LC_SEGMENT_64 ) {
const segment_command_64* segCmd = (segment_command_64*)cmd;
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=(uint32_t)segCmd->fileoff, .fileSize=(uint32_t)segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
+ SegmentInfo segInfo { .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
+ .fileOffset=(uint32_t)segCmd->fileoff, .fileSize=(uint32_t)segCmd->filesize, .flags=segCmd->flags, .perms=(uint8_t)segCmd->initprot };
callback(segInfo, stop);
- ++segmentIndex;
}
else if ( cmd->cmd == LC_SEGMENT ) {
const segment_command* segCmd = (segment_command*)cmd;
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=segCmd->fileoff, .fileSize=segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
+ SegmentInfo segInfo { .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
+ .fileOffset=segCmd->fileoff, .fileSize=segCmd->filesize, .flags=segCmd->flags, .perms=(uint8_t)segCmd->initprot };
callback(segInfo, stop);
- ++segmentIndex;
- }
- });
-}
-
-void Header::forEachSegment(void (^callback)(const SegmentInfo& infos, uint64_t sizeOfSections, uint32_t maxAlignOfSections, bool& stop)) const
-{
- __block uint16_t segmentIndex = 0;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_SEGMENT_64 ) {
- const segment_command_64* segCmd = (segment_command_64*)cmd;
- uint64_t sizeOfSections = segCmd->vmsize;
- uint32_t maxAlignOfSections = 0;
- const section_64* const sectionsStart = (section_64*)((char*)segCmd + sizeof(struct segment_command_64));
- const section_64* const sectionsEnd = §ionsStart[segCmd->nsects];
- for (const section_64* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- sizeOfSections = sect->addr + sect->size - segCmd->vmaddr;
- if ( sect->align > maxAlignOfSections )
- maxAlignOfSections = sect->align;
- }
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=(uint32_t)segCmd->fileoff, .fileSize=(uint32_t)segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
- callback(segInfo, sizeOfSections, maxAlignOfSections, stop);
- ++segmentIndex;
- }
- else if ( cmd->cmd == LC_SEGMENT ) {
- const segment_command* segCmd = (segment_command*)cmd;
- uint64_t sizeOfSections = segCmd->vmsize;
- uint32_t maxAlignOfSections = 0;
- const section* const sectionsStart = (section*)((char*)segCmd + sizeof(struct segment_command));
- const section* const sectionsEnd = §ionsStart[segCmd->nsects];
- for (const section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- sizeOfSections = sect->addr + sect->size - segCmd->vmaddr;
- if ( sect->align > maxAlignOfSections )
- maxAlignOfSections = sect->align;
- }
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=segCmd->fileoff, .fileSize=segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
- callback(segInfo, sizeOfSections, maxAlignOfSections, stop);
- ++segmentIndex;
}
});
}
void Header::forEachSection(void (^callback)(const SectionInfo&, bool& stop)) const
{
- __block uint16_t segmentIndex = 0;
+ __block uint64_t prefLoadAddr = 0;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
if ( cmd->cmd == LC_SEGMENT_64 ) {
const segment_command_64* segCmd = (segment_command_64*)cmd;
+ if ( strcmp(segCmd->segname, "__TEXT") == 0 )
+ prefLoadAddr = segCmd->vmaddr;
const section_64* const sectionsStart = (section_64*)((char*)segCmd + sizeof(struct segment_command_64));
const section_64* const sectionsEnd = §ionsStart[segCmd->nsects];
- std::string_view segName = name16(segCmd->segname);
+
for ( const section_64* sect = sectionsStart; !stop && (sect < sectionsEnd); ++sect ) {
- std::string_view segNameFromSectLC = name16(sect->segname);
- SectionInfo info = {
- // Note: use of segCmd->segname is for bin compat for copy protection in rdar://146096183
- .sectionName=name16(sect->sectname), .segmentName=segNameFromSectLC.empty() ? segName : segNameFromSectLC, .segIndex=segmentIndex,
- .segMaxProt=(uint32_t)segCmd->maxprot, .segInitProt=(uint32_t)segCmd->initprot,
- .flags=sect->flags, .alignment=sect->align, .address=sect->addr, .size=sect->size, .fileOffset=sect->offset,
- .relocsOffset=sect->reloff, .relocsCount=sect->nreloc, .reserved1=sect->reserved1, .reserved2=sect->reserved2
- };
+ std::string_view sectName = name16(sect->sectname);
+ std::string_view segName = name16(sect->segname);
+ SectionInfo info = { segName, sectName, (uint32_t)segCmd->initprot, sect->flags, sect->align, sect->addr - prefLoadAddr, sect->size, sect->offset,
+ sect->reloff, sect->nreloc, sect->reserved1, sect->reserved2};
callback(info, stop);
}
- ++segmentIndex;
}
else if ( cmd->cmd == LC_SEGMENT ) {
const segment_command* segCmd = (segment_command*)cmd;
+ if ( strcmp(segCmd->segname, "__TEXT") == 0 )
+ prefLoadAddr = segCmd->vmaddr;
const section* const sectionsStart = (section*)((char*)segCmd + sizeof(struct segment_command));
const section* const sectionsEnd = §ionsStart[segCmd->nsects];
for ( const section* sect = sectionsStart; !stop && (sect < sectionsEnd); ++sect ) {
- SectionInfo info = {
- .sectionName=name16(sect->sectname), .segmentName=name16(sect->segname), .segIndex=segmentIndex,
- .segMaxProt=(uint32_t)segCmd->maxprot, .segInitProt=(uint32_t)segCmd->initprot,
- .flags=sect->flags, .alignment=sect->align, .address=sect->addr, .size=sect->size, .fileOffset=sect->offset,
- .relocsOffset=sect->reloff, .relocsCount=sect->nreloc, .reserved1=sect->reserved1, .reserved2=sect->reserved2
- };
+ std::string_view sectName = name16(sect->sectname);
+ std::string_view segName = name16(sect->segname);
+ SectionInfo info = { segName, sectName, (uint32_t)segCmd->initprot, sect->flags, sect->align, sect->addr - prefLoadAddr, sect->size, sect->offset,
+ sect->reloff, sect->nreloc, sect->reserved1, sect->reserved2};
callback(info, stop);
}
- ++segmentIndex;
- }
- });
-}
-
-void Header::forEachSection(void (^callback)(const SegmentInfo&, const SectionInfo&, bool& stop)) const
-{
- __block uint16_t segmentIndex = 0;
- forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
- if ( cmd->cmd == LC_SEGMENT_64 ) {
- const segment_command_64* segCmd = (segment_command_64*)cmd;
- const section_64* const sectionsStart = (section_64*)((char*)segCmd + sizeof(struct segment_command_64));
- const section_64* const sectionsEnd = §ionsStart[segCmd->nsects];
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=(uint32_t)segCmd->fileoff, .fileSize=(uint32_t)segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
- for ( const section_64* sect = sectionsStart; !stop && (sect < sectionsEnd); ++sect ) {
- SectionInfo info = {
- .sectionName=name16(sect->sectname), .segmentName=name16(sect->segname), .segIndex=segmentIndex,
- .segMaxProt=(uint32_t)segCmd->maxprot, .segInitProt=(uint32_t)segCmd->initprot,
- .flags=sect->flags, .alignment=sect->align, .address=sect->addr, .size=sect->size, .fileOffset=sect->offset,
- .relocsOffset=sect->reloff, .relocsCount=sect->nreloc, .reserved1=sect->reserved1, .reserved2=sect->reserved2
- };
- callback(segInfo, info, stop);
- }
- ++segmentIndex;
- }
- else if ( cmd->cmd == LC_SEGMENT ) {
- const segment_command* segCmd = (segment_command*)cmd;
- const section* const sectionsStart = (section*)((char*)segCmd + sizeof(struct segment_command));
- const section* const sectionsEnd = §ionsStart[segCmd->nsects];
- SegmentInfo segInfo {
- .segmentName=name16(segCmd->segname), .vmaddr=segCmd->vmaddr, .vmsize=segCmd->vmsize,
- .fileOffset=segCmd->fileoff, .fileSize=segCmd->filesize, .flags=segCmd->flags,
- .segmentIndex=segmentIndex, .maxProt=(uint8_t)segCmd->maxprot, .initProt=(uint8_t)segCmd->initprot,
- };
- for ( const section* sect = sectionsStart; !stop && (sect < sectionsEnd); ++sect ) {
- SectionInfo info = {
- .sectionName=name16(sect->sectname), .segmentName=name16(sect->segname), .segIndex=segmentIndex,
- .segMaxProt=(uint32_t)segCmd->maxprot, .segInitProt=(uint32_t)segCmd->initprot,
- .flags=sect->flags, .alignment=sect->align, .address=sect->addr, .size=sect->size, .fileOffset=sect->offset,
- .relocsOffset=sect->reloff, .relocsCount=sect->nreloc, .reserved1=sect->reserved1, .reserved2=sect->reserved2
- };
- callback(segInfo, info, stop);
- }
- ++segmentIndex;
- }
- });
-}
-
-std::span<const uint8_t> Header::findSectionContent(CString segName, CString sectName, bool useVmOffset) const
-{
- __block std::span<const uint8_t> result;
- this->forEachSection(^(const SectionInfo& info, bool& stop) {
- if ( (info.segmentName == segName) && (info.sectionName == sectName) ) {
- const uint8_t* sectionContent = nullptr;
- if ( useVmOffset ) {
- // dyld loaded image, find section based on vmaddr
- sectionContent = (uint8_t*)this + (info.address - this->preferredLoadAddress());
- }
- else {
- // file mapped image, use file offsets to get content
- sectionContent = (uint8_t*)this + info.fileOffset;
- }
- stop = true;
- result = std::span<const uint8_t>(sectionContent, (size_t)info.size);
- }
- });
- return result;
+ }
+ });
}
// add any LINKEDIT content file-offset in load commands to this to get content
@@ -2653,11 +1526,13 @@
// need to find LINKEDIT and TEXT to compute difference of file offsets vs vm offsets
__block uint64_t result = 0;
__block uint64_t textVmAddr = 0;
+ __block uint64_t textFileOffset = 0;
forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
if ( cmd->cmd == LC_SEGMENT_64 ) {
const segment_command_64* segCmd = (segment_command_64*)cmd;
if ( strcmp(segCmd->segname, "__TEXT") == 0 ) {
textVmAddr = segCmd->vmaddr;
+ textFileOffset = segCmd->fileoff;
}
else if ( strcmp(segCmd->segname, "__LINKEDIT") == 0 ) {
uint64_t vmOffsetToLinkedit = segCmd->vmaddr - textVmAddr;
@@ -2670,10 +1545,11 @@
const segment_command* segCmd = (segment_command*)cmd;
if ( strcmp(segCmd->segname, "__TEXT") == 0 ) {
textVmAddr = segCmd->vmaddr;
+ textFileOffset = segCmd->fileoff;
}
else if ( strcmp(segCmd->segname, "__LINKEDIT") == 0 ) {
uint64_t vmOffsetToLinkedit = segCmd->vmaddr - textVmAddr;
- uint64_t fileOffsetToLinkedit = segCmd->fileoff;
+ uint64_t fileOffsetToLinkedit = segCmd->fileoff - textFileOffset;
result = vmOffsetToLinkedit - fileOffsetToLinkedit;
stop = true;
}
@@ -2695,44 +1571,28 @@
return result;
}
-// checks if a section exists.
-// use `segNamePrefix` to just match segment name prefix (e.g. "__DATA" matches "__DATA_CONST")
-bool Header::hasSection(CString segName, CString sectName, bool segNamePrefix) const
+bool Header::isRestricted() const
{
__block bool result = false;
this->forEachSection(^(const SectionInfo& info, bool& stop) {
- if ( info.sectionName == sectName ) {
- if ( (segNamePrefix && info.segmentName.starts_with(segName)) || (info.segmentName == segName)) {
- result = true;
- stop = true;
- }
+ if ( (info.segmentName == "__RESTRICT") && (info.sectionName == "__restrict") ) {
+ result = true;
+ stop = true;
}
});
return result;
}
-bool Header::isRestricted() const
-{
- return this->hasSection("__RESTRICT", "__restrict");
-}
-
bool Header::hasInterposingTuples() const
{
__block bool hasInterposing = false;
- this->forEachInterposingSection(^(const SectionInfo& info, bool& stop) {
- hasInterposing = true;
- stop = true;
- });
- return hasInterposing;
-}
-
-void Header::forEachInterposingSection(void (^callback)(const SectionInfo&, bool& stop)) const
-{
this->forEachSection(^(const SectionInfo& info, bool& stop) {
if ( ((info.flags & SECTION_TYPE) == S_INTERPOSING) || ((info.sectionName == "__interpose") && (info.segmentName.starts_with("__DATA") || info.segmentName.starts_with("__AUTH"))) ) {
- callback(info, stop);
- }
- });
+ hasInterposing = true;
+ stop = true;
+ }
+ });
+ return hasInterposing;
}
bool Header::hasObjC() const
@@ -2767,6 +1627,11 @@
return hasEncryptionInfo(cryptId, textOffset, size) && cryptId == 1;
}
+bool Header::canBeFairPlayEncrypted() const
+{
+ return (findFairPlayEncryptionLoadCommand() != nullptr);
+}
+
const encryption_info_command* Header::findFairPlayEncryptionLoadCommand() const
{
__block const encryption_info_command* result = nullptr;
@@ -2808,13 +1673,6 @@
}
});
}
-
-bool Header::hasFunctionVariantFixups() const
-{
- return hasLoadCommand(LC_FUNCTION_VARIANT_FIXUPS);
-}
-
-
void Header::forEachLinkerOption(void (^callback)(const char* opt, bool& stop)) const
{
@@ -2852,44 +1710,10 @@
return result;
}
-uint32_t Header::threadLoadCommandsSize(const Architecture& arch)
-{
- uint32_t cmdSize = sizeof(thread_command);
- if ( arch.sameCpu(Architecture::arm64) )
- cmdSize = Header::pointerAligned(true, 16 + 34 * 8); // base size + ARM_EXCEPTION_STATE64_COUNT * 8
- else if ( arch.sameCpu(Architecture::arm64_32) )
- cmdSize = Header::pointerAligned(false, 16 + 34 * 8); // base size + ARM_EXCEPTION_STATE64_COUNT * 8
- else if ( arch.sameCpu(Architecture::x86_64) )
- cmdSize = Header::pointerAligned(true, 16 + 42 * 4); // base size + x86_THREAD_STATE64_COUNT * 4
- else if ( arch.usesArmOrThumbInstructions() )
- cmdSize = Header::pointerAligned(false, 16 + 17 * 4); // base size + ARM_THREAD_STATE_COUNT * 4
- else
- assert(0 && "unsupported arch for thread load command");
- return cmdSize;
-}
-
-uint32_t Header::threadLoadCommandsSize() const
-{
- return Header::threadLoadCommandsSize(arch());
-}
uint32_t Header::headerAndLoadCommandsSize() const
{
return machHeaderSize() + mh.sizeofcmds;
-}
-
-uint32_t Header::pointerAligned(bool is64, uint32_t value)
-{
- // mach-o requires all load command sizes to be a multiple the pointer size
- if ( is64 )
- return ((value + 7) & (-8));
- else
- return ((value + 3) & (-4));
-}
-
-uint32_t Header::pointerAligned(uint32_t value) const
-{
- return Header::pointerAligned(is64(), value);
}
uint32_t Header::fileSize() const
@@ -2904,9 +1728,7 @@
stop = true;
}
});
- if ( size != 0 )
- return size;
- return headerAndLoadCommandsSize();
+ return size;
}
// compute file size from LINKEDIT fileoffset + filesize
@@ -2929,132 +1751,864 @@
return size;
}
-struct OldThreadsStartSection
-{
- uint32_t padding : 31,
- stride8 : 1;
- uint32_t chain_starts[1];
-};
-
-// ld64 can't sometimes determine the size of __thread_starts accurately,
-// because these sections have to be given a size before everything is laid out,
-// and you don't know the actual size of the chains until everything is
-// laid out. In order to account for this, the linker puts trailing 0xFFFFFFFF at
-// the end of the section, that must be ignored when walking the chains. This
-// patch adjust the section size accordingly.
-static uint32_t adjustStartsCount(uint32_t startsCount, const uint32_t* starts) {
- for ( int i = startsCount; i > 0; --i )
- {
- if ( starts[i - 1] == 0xFFFFFFFF )
- startsCount--;
- else
+//
+// MARK: --- methods that create and modify ---
+//
+
+#if BUILDING_MACHO_WRITER
+
+Header* Header::make(std::span<uint8_t> buffer, uint32_t filetype, uint32_t flags, Architecture arch, bool addImplicitTextSegment)
+{
+ const size_t minHeaderAlignment = filetype == MH_OBJECT ? 8 : getpagesize();
+ assert(((uint64_t)buffer.data() & (minHeaderAlignment - 1)) == 0);
+ assert(buffer.size() >= sizeof(mach_header_64));
+ bzero(buffer.data(), buffer.size());
+ Header& header = *(Header*)buffer.data();
+ mach_header& mh = header.mh;
+ if ( arch.isBigEndian() ) {
+ mh.magic = arch.is64() ? MH_CIGAM_64 : MH_CIGAM;
+ mh.filetype = OSSwapBigToHostInt32(filetype);
+ mh.ncmds = 0;
+ mh.sizeofcmds = OSSwapBigToHostInt32(MH_NOUNDEFS | MH_DYLDLINK | MH_TWOLEVEL);
+ mh.flags = OSSwapBigToHostInt32(flags);
+ arch.set(mh);
+ return &header; // can only construct mach_header for big-endian
+ }
+ else {
+ mh.magic = arch.is64() ? MH_MAGIC_64 : MH_MAGIC;
+ mh.filetype = filetype;
+ mh.ncmds = 0;
+ mh.sizeofcmds = 0;
+ mh.flags = flags;
+ arch.set(mh);
+ }
+ if ( addImplicitTextSegment && (filetype != MH_OBJECT) ) {
+ SegmentInfo segInfo { .segmentName="__TEXT", .vmaddr=0, .vmsize=0x1000, .fileOffset=0, .fileSize=0x1000, .perms=(VM_PROT_READ | VM_PROT_EXECUTE) };
+ header.addSegment(segInfo, std::array { "__text" });
+ }
+
+ return &header;
+}
+
+void Header::save(char savedPath[PATH_MAX]) const
+{
+ ::strcpy(savedPath, "/tmp/mocko-XXXXXX");
+ int fd = ::mkstemp(savedPath);
+ if ( fd != -1 ) {
+ ::pwrite(fd, this, sizeof(Header), 0);
+ ::close(fd);
+ }
+}
+
+uint32_t Header::pointerAligned(uint32_t value) const
+{
+ // mach-o requires all load command sizes to be a multiple the pointer size
+ if ( is64() )
+ return ((value + 7) & (-8));
+ else
+ return ((value + 3) & (-4));
+}
+
+load_command* Header::firstLoadCommand()
+{
+ if ( mh.magic == MH_MAGIC )
+ return (load_command*)((uint8_t*)this + sizeof(mach_header));
+ else
+ return (load_command*)((uint8_t*)this + sizeof(mach_header_64));
+}
+
+// creates space for a new load command, but does not fill in its payload
+load_command* Header::appendLoadCommand(uint32_t cmd, uint32_t cmdSize)
+{
+ load_command* thisCmd = (load_command*)((uint8_t*)firstLoadCommand() + mh.sizeofcmds);
+ thisCmd->cmd = cmd;
+ thisCmd->cmdsize = cmdSize;
+ mh.ncmds += 1;
+ mh.sizeofcmds += cmdSize;
+
+ return thisCmd;
+}
+
+// copies a new load command from another
+void Header::appendLoadCommand(const load_command* lc)
+{
+ load_command* thisCmd = (load_command*)((uint8_t*)firstLoadCommand() + mh.sizeofcmds);
+ ::memcpy(thisCmd, lc, lc->cmdsize);
+ mh.ncmds += 1;
+ mh.sizeofcmds += lc->cmdsize;
+}
+
+void Header::addBuildVersion(Platform platform, Version32 minOS, Version32 sdk, std::span<const build_tool_version> tools)
+{
+ assert(platform != Platform::zippered && "can't add a build command for Platform::zippered, it must be split");
+ uint32_t lcSize = (uint32_t)(sizeof(build_version_command) + tools.size() * sizeof(build_tool_version));
+ build_version_command* bv = (build_version_command*)appendLoadCommand(LC_BUILD_VERSION, lcSize);
+ bv->platform = platform.value();
+ bv->minos = minOS.value();
+ bv->sdk = sdk.value();
+ bv->ntools = (uint32_t)tools.size();
+ if ( bv->ntools != 0 )
+ memcpy((uint8_t*)bv + sizeof(build_version_command), &tools[0], tools.size() * sizeof(build_tool_version));
+}
+
+void Header::addMinVersion(Platform platform, Version32 minOS, Version32 sdk)
+{
+ version_min_command vc;
+ vc.cmdsize = sizeof(version_min_command);
+ vc.version = minOS.value();
+ vc.sdk = sdk.value();
+ if ( platform == Platform::macOS )
+ vc.cmd = LC_VERSION_MIN_MACOSX;
+ else if ( (platform == Platform::iOS) || (platform == Platform::iOS_simulator) )
+ vc.cmd = LC_VERSION_MIN_IPHONEOS;
+ else if ( (platform == Platform::watchOS) || (platform == Platform::watchOS_simulator) )
+ vc.cmd = LC_VERSION_MIN_WATCHOS;
+ else if ( (platform == Platform::tvOS) || (platform == Platform::tvOS_simulator) )
+ vc.cmd = LC_VERSION_MIN_TVOS;
+ else
+ assert(0 && "unknown platform");
+ appendLoadCommand((load_command*)&vc);
+}
+
+void Header::setHasThreadLocalVariables()
+{
+ assert(mh.filetype != MH_OBJECT);
+ mh.flags |= MH_HAS_TLV_DESCRIPTORS;
+}
+
+void Header::setHasWeakDefs()
+{
+ assert(mh.filetype != MH_OBJECT);
+ mh.flags |= MH_WEAK_DEFINES;
+}
+
+void Header::setUsesWeakDefs()
+{
+ assert(mh.filetype != MH_OBJECT);
+ mh.flags |= MH_BINDS_TO_WEAK;
+}
+
+void Header::setAppExtensionSafe()
+{
+ assert(mh.filetype == MH_DYLIB);
+ mh.flags |= MH_APP_EXTENSION_SAFE;
+}
+
+void Header::setSimSupport()
+{
+ assert(mh.filetype == MH_DYLIB);
+ mh.flags |= MH_SIM_SUPPORT;
+}
+
+void Header::setNoReExportedDylibs()
+{
+ assert(mh.filetype == MH_DYLIB);
+ mh.flags |= MH_NO_REEXPORTED_DYLIBS;
+}
+
+void Header::addPlatformInfo(Platform platform, Version32 minOS, Version32 sdk, std::span<const build_tool_version> tools)
+{
+ Architecture arch(&mh);
+ Policy policy(arch, { platform, minOS, sdk }, mh.filetype);
+ switch ( policy.useBuildVersionLoadCommand() ) {
+ case Policy::preferUse:
+ case Policy::mustUse:
+ // three macOS dylibs under libSystem need to be built with old load commands to support old simulator runtimes
+ if ( isSimSupport() && (platform == Platform::macOS) && ((arch == Architecture::x86_64) || (arch == Architecture::i386)) )
+ addMinVersion(platform, minOS, sdk);
+ else
+ addBuildVersion(platform, minOS, sdk, tools);
break;
- }
- return startsCount;
-}
-
-bool Header::hasFirmwareChainStarts(uint16_t* pointerFormat, uint32_t* startsCount, const uint32_t** starts) const
-{
- if ( !this->isPreload() && !this->isStaticExecutable() )
- return false;
-
- __block bool result = false;
- this->forEachSection(^(const SectionInfo& info, bool& stop) {
- if ( (info.sectionName == "__chain_starts") && (info.segmentName == "__TEXT") ) {
- const dyld_chained_starts_offsets* startsSect = (dyld_chained_starts_offsets*)((uint8_t*)this + info.fileOffset);
- if ( pointerFormat != nullptr )
- *pointerFormat = startsSect->pointer_format;
- if ( startsCount != nullptr )
- *startsCount = (info.size >= 4) ? startsSect->starts_count : 0;
- if ( starts != nullptr )
- *starts = &startsSect->chain_starts[0];
- result = true;
- stop = true;
- }
- else if ( (info.sectionName == "__thread_starts") && (info.segmentName == "__TEXT") ) {
- const OldThreadsStartSection* sect = (OldThreadsStartSection*)((uint8_t*)this + info.fileOffset);
- if ( pointerFormat != nullptr )
- *pointerFormat = sect->stride8 ? DYLD_CHAINED_PTR_ARM64E : DYLD_CHAINED_PTR_ARM64E_FIRMWARE;
- if ( startsCount != nullptr )
- *startsCount = adjustStartsCount((uint32_t)(info.size/4) - 1, sect->chain_starts);
- if ( starts != nullptr )
- *starts = sect->chain_starts;
- result = true;
- stop = true;
- }
- });
- return result;
-}
-
-bool Header::hasFirmwareRebaseRuns() const
-{
- return forEachFirmwareRebaseRuns(nullptr);
-}
-
-// content of __TEXT,__rebase_info section
-struct RebaseInfo
-{
- uint32_t startAddress;
- uint8_t runs[]; // value of even indexes is how many pointers in a row are rebases, value of odd indexes times 4 is memory to skip over
- // two zero values in a row signals the end of the run
-};
-
-
-bool Header::forEachFirmwareRebaseRuns(void (^handler)(uint32_t offset, bool& stop)) const
-{
- if ( !this->isPreload() && !this->isStaticExecutable() )
- return false;
-
- __block const RebaseInfo* rr = nullptr;
- __block const RebaseInfo* end = nullptr;
- this->forEachSection(^(const SectionInfo& info, bool& sectStop) {
- if ( (info.sectionName == "__rebase_info") && (info.segmentName == "__TEXT") ) {
- sectStop = true;
- rr = (RebaseInfo*)((uint8_t*)this + info.fileOffset);
- end = (RebaseInfo*)((uint8_t*)rr + info.size);
- }
- });
- if ( rr == nullptr )
- return false;
-
- if ( handler != nullptr ) {
- bool stop = false;
- while ( (rr < end) && !stop ) {
- uint32_t address = rr->startAddress;
- int index = 0;
- bool done = false;
- while ( !done && !stop ) {
- uint8_t count = rr->runs[index];
- if ( count == 0 ) {
- // two 0x00 in a row mean the run is complete
- if ( rr->runs[index+1] == 0 ) {
- ++index;
- done = true;
+ case Policy::preferDontUse:
+ case Policy::mustNotUse:
+ addMinVersion(platform, minOS, sdk);
+ break;
+ }
+}
+
+void Header::addNullUUID()
+{
+ uuid_command uc;
+ uc.cmd = LC_UUID;
+ uc.cmdsize = sizeof(uuid_command);
+ bzero(uc.uuid, 16);
+ appendLoadCommand((load_command*)&uc);
+}
+
+void Header::addUniqueUUID(uuid_t copyOfUUID)
+{
+ uuid_command uc;
+ uc.cmd = LC_UUID;
+ uc.cmdsize = sizeof(uuid_command);
+ uuid_generate_random(uc.uuid);
+ appendLoadCommand((load_command*)&uc);
+ if ( copyOfUUID )
+ memcpy(copyOfUUID, uc.uuid, sizeof(uuid_t));
+}
+
+void Header::updateUUID(uuid_t uuid)
+{
+ __block bool found = false;
+ forEachLoadCommandSafe(^(const load_command *cmd, bool &stop) {
+ if ( cmd->cmd == LC_UUID ) {
+ memcpy(((uuid_command*)cmd)->uuid, uuid, 16);
+ found = true;
+ stop = true;
+ }
+ });
+ assert(found && "updateUUID called without a LC_UUID command");
+}
+
+void Header::addSegment(const SegmentInfo& info, std::span<const char* const> sectionNames)
+{
+ if ( is64() ) {
+ uint32_t lcSize = (uint32_t)(sizeof(segment_command_64) + sectionNames.size() * sizeof(section_64));
+ segment_command_64* sc = (segment_command_64*)appendLoadCommand(LC_SEGMENT_64, lcSize);
+ strncpy(sc->segname, info.segmentName.data(), 16);
+ sc->vmaddr = info.vmaddr;
+ sc->vmsize = info.vmsize;
+ sc->fileoff = info.fileOffset;
+ sc->filesize = info.fileSize;
+ sc->initprot = info.perms;
+ sc->maxprot = info.perms;
+ sc->nsects = (uint32_t)sectionNames.size();
+ sc->flags = info.flags;
+ section_64* const sect = (section_64*)((uint8_t*)sc + sizeof(struct segment_command_64));
+ uint32_t sectionIndex = 0;
+ for ( const char* sectName : sectionNames ) {
+ strncpy(sect[sectionIndex].segname, info.segmentName.data(), 16);
+ strncpy(sect[sectionIndex].sectname, sectName, 16);
+ ++sectionIndex;
+ }
+ }
+ else {
+ uint32_t lcSize = (uint32_t)(sizeof(segment_command) + sectionNames.size() * sizeof(section));
+ segment_command* sc = (segment_command*)appendLoadCommand(LC_SEGMENT, lcSize);
+ strncpy(sc->segname, info.segmentName.data(), 16);
+ sc->vmaddr = (uint32_t)info.vmaddr;
+ sc->vmsize = (uint32_t)info.vmsize;
+ sc->fileoff = info.fileOffset;
+ sc->filesize = info.fileSize;
+ sc->initprot = info.perms;
+ sc->maxprot = info.perms;
+ sc->nsects = (uint32_t)sectionNames.size();
+ sc->flags = info.flags;
+ section* const sect = (section*)((uint8_t*)sc + sizeof(struct segment_command));
+ uint32_t sectionIndex = 0;
+ for ( const char* sectName : sectionNames ) {
+ strncpy(sect[sectionIndex].segname, info.segmentName.data(), 16);
+ strncpy(sect[sectionIndex].sectname, sectName, 16);
+ ++sectionIndex;
+ }
+ }
+}
+
+void Header::updateSection(const SectionInfo& info)
+{
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == LC_SEGMENT_64 ) {
+ segment_command_64* segCmd = (segment_command_64*)cmd;
+ if (info.segmentName == segCmd->segname) {
+ section_64* const sectionsStart = (section_64*)((char*)segCmd + sizeof(struct segment_command_64));
+ section_64* const sectionsEnd = §ionsStart[segCmd->nsects];
+ for ( section_64* sect=sectionsStart; sect < sectionsEnd; ++sect ) {
+ if ( strncmp(info.sectionName.data(), sect->sectname, 16) == 0 ) {
+ sect->addr = info.address;
+ sect->size = info.size;
+ sect->offset = info.fileOffset;
+ sect->align = info.alignment;
+ sect->reloff = info.relocsOffset;
+ sect->nreloc = info.relocsCount;
+ sect->flags = info.flags;
+ sect->reserved1 = info.reserved1;
+ sect->reserved2 = info.reserved2;
+ sect->reserved3 = 0;
+ stop = true;
+ return;
}
}
- else {
- if ( index & 1 ) {
- // odd runs index => how much to jump forward
- address += ((count-1) * 4);
- }
- else {
- // even runs index => how many pointers in a row that need rebasing
- for (int i=0; i < count; ++i) {
- handler(address, stop);
- address += 4;
- }
+ }
+ }
+ else if ( cmd->cmd == LC_SEGMENT ) {
+ segment_command* segCmd = (segment_command*)cmd;
+ if (info.segmentName == segCmd->segname) {
+ section* const sectionsStart = (section*)((char*)segCmd + sizeof(struct segment_command));
+ section* const sectionsEnd = §ionsStart[segCmd->nsects];
+ for ( section* sect=sectionsStart; sect < sectionsEnd; ++sect ) {
+ if ( strncmp(info.sectionName.data(), sect->sectname, 16) == 0 ) {
+ sect->addr = (uint32_t)info.address;
+ sect->size = (uint32_t)info.size;
+ sect->offset = info.fileOffset;
+ sect->align = info.alignment;
+ sect->reloff = info.relocsOffset;
+ sect->nreloc = info.relocsCount;
+ sect->flags = info.flags;
+ sect->reserved1 = info.reserved1;
+ sect->reserved2 = info.reserved2;
+ stop = true;
+ return;
}
}
- ++index;
- }
- // 4-byte align for next run
- index = (index+3) & (-4);
- rr = (RebaseInfo*)(&rr->runs[index]);
- }
- }
-
- return true;
-}
+ }
+ }
+ });
+}
+
+void Header::updateSegment(const SegmentInfo& info)
+{
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == LC_SEGMENT_64 ) {
+ segment_command_64* segCmd = (segment_command_64*)cmd;
+ if (info.segmentName == segCmd->segname) {
+ segCmd->vmaddr = info.vmaddr;
+ segCmd->vmsize = info.vmsize;
+ segCmd->fileoff = info.fileOffset;
+ segCmd->filesize = info.fileSize;
+ segCmd->initprot = info.perms;
+ segCmd->maxprot = info.perms;
+ stop = true;
+ return;
+ }
+ }
+ else if ( cmd->cmd == LC_SEGMENT ) {
+ segment_command* segCmd = (segment_command*)cmd;
+ if (info.segmentName == segCmd->segname) {
+ segCmd->vmaddr = (uint32_t)info.vmaddr;
+ segCmd->vmsize = (uint32_t)info.vmsize;
+ segCmd->fileoff = info.fileOffset;
+ segCmd->filesize = info.fileSize;
+ segCmd->initprot = info.perms;
+ segCmd->maxprot = info.perms;
+ stop = true;
+ return;
+ }
+ }
+ });
+}
+
+
+void Header::addInstallName(const char* name, Version32 compatVers, Version32 currentVersion)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylib_command) + strlen(name) + 1));
+ dylib_command* ic = (dylib_command*)appendLoadCommand(LC_ID_DYLIB, alignedSize);
+ ic->dylib.name.offset = sizeof(dylib_command);
+ ic->dylib.current_version = currentVersion.value();
+ ic->dylib.compatibility_version = compatVers.value();
+ strcpy((char*)ic + ic->dylib.name.offset, name);
+}
+
+void Header::addDependentDylib(const char* path, DependentDylibAttributes depAttrs, Version32 compatVers, Version32 currentVersion)
+{
+ uint32_t cmd = 0;
+ if ( depAttrs == DependentDylibAttributes::regular )
+ cmd = LC_LOAD_DYLIB;
+ else if ( depAttrs == DependentDylibAttributes::justWeakLink )
+ cmd = LC_LOAD_WEAK_DYLIB;
+ else if ( depAttrs == DependentDylibAttributes::justUpward )
+ cmd = LC_LOAD_UPWARD_DYLIB;
+ else if ( depAttrs == DependentDylibAttributes::justReExport )
+ cmd = LC_REEXPORT_DYLIB;
+
+ if ( cmd ) {
+ // make traditional load command
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylib_command) + strlen(path) + 1));
+ dylib_command* dc = (dylib_command*)appendLoadCommand(cmd, alignedSize);
+ dc->dylib.name.offset = sizeof(dylib_command);
+ dc->dylib.current_version = currentVersion.value();
+ dc->dylib.compatibility_version = compatVers.value();
+ dc->dylib.timestamp = 2; // needs to be some constant value that is different than dylib id load command;
+ strcpy((char*)dc + dc->dylib.name.offset, path);
+ }
+ else {
+ // make new style load command with extra flags field
+ if ( depAttrs.weakLink )
+ cmd = LC_LOAD_WEAK_DYLIB;
+ else
+ cmd = LC_LOAD_DYLIB;
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylib_use_command) + strlen(path) + 1));
+ dylib_use_command* dc = (dylib_use_command*)appendLoadCommand(cmd, alignedSize);
+ dc->nameoff = sizeof(dylib_use_command);
+ dc->current_version = currentVersion.value();
+ dc->compat_version = 0x00010000; // unused, but looks like 1.0 to old tools
+ dc->marker = 0x1a741800; // magic value that means dylib_use_command
+ dc->flags = depAttrs.raw;
+ strcpy((char*)dc + dc->nameoff, path);
+ }
+}
+
+void Header::addLibSystem()
+{
+ addDependentDylib("/usr/lib/libSystem.B.dylib");
+}
+
+void Header::addDylibId(CString name, Version32 compatVers, Version32 currentVersion)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylib_command) + name.size() + 1));
+ dylib_command* dc = (dylib_command*)appendLoadCommand(LC_ID_DYLIB, alignedSize);
+ dc->dylib.name.offset = sizeof(dylib_command);
+ dc->dylib.timestamp = 1; // needs to be some constant value that is different than dependent dylib
+ dc->dylib.current_version = currentVersion.value();
+ dc->dylib.compatibility_version = compatVers.value();
+ strcpy((char*)dc + dc->dylib.name.offset, name.c_str());
+}
+
+void Header::addDyldID()
+{
+ const char* path = "/usr/lib/dyld";
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylinker_command) + strlen(path) + 1));
+ dylinker_command* dc = (dylinker_command*)appendLoadCommand(LC_ID_DYLINKER, alignedSize);
+ dc->name.offset = sizeof(dylinker_command);
+ strcpy((char*)dc + dc->name.offset, path);
+}
+
+void Header::addDynamicLinker()
+{
+ const char* path = "/usr/lib/dyld";
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylinker_command) + strlen(path) + 1));
+ dylinker_command* dc = (dylinker_command*)appendLoadCommand(LC_LOAD_DYLINKER, alignedSize);
+ dc->name.offset = sizeof(dylinker_command);
+ strcpy((char*)dc + dc->name.offset, path);
+}
+
+void Header::addFairPlayEncrypted(uint32_t offset, uint32_t size)
+{
+ if ( is64() ) {
+ encryption_info_command_64 en64;
+ en64.cmd = LC_ENCRYPTION_INFO_64;
+ en64.cmdsize = sizeof(encryption_info_command_64);
+ en64.cryptoff = offset;
+ en64.cryptsize = size;
+ en64.cryptid = 0;
+ en64.pad = 0;
+ appendLoadCommand((load_command*)&en64);
+ }
+ else {
+ encryption_info_command en32;
+ en32.cmd = LC_ENCRYPTION_INFO;
+ en32.cmdsize = sizeof(encryption_info_command);
+ en32.cryptoff = offset;
+ en32.cryptsize = size;
+ en32.cryptid = 0;
+ appendLoadCommand((load_command*)&en32);
+ }
+}
+
+void Header::addRPath(const char* path)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(rpath_command) + strlen(path) + 1));
+ rpath_command* rc = (rpath_command*)appendLoadCommand(LC_RPATH, alignedSize);
+ rc->path.offset = sizeof(rpath_command);
+ strcpy((char*)rc + rc->path.offset, path);
+}
+
+void Header::addDyldEnvVar(const char* path)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(dylinker_command) + strlen(path) + 1));
+ dylinker_command* dc = (dylinker_command*)appendLoadCommand(LC_DYLD_ENVIRONMENT, alignedSize);
+ dc->name.offset = sizeof(dylinker_command);
+ strcpy((char*)dc + dc->name.offset, path);
+}
+
+void Header::addAllowableClient(const char* clientName)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(sub_client_command) + strlen(clientName) + 1));
+ sub_client_command* ac = (sub_client_command*)appendLoadCommand(LC_SUB_CLIENT, alignedSize);
+ ac->client.offset = sizeof(sub_client_command);
+ strcpy((char*)ac + ac->client.offset, clientName);
+}
+
+void Header::addUmbrellaName(const char* umbrellaName)
+{
+ uint32_t alignedSize = pointerAligned((uint32_t)(sizeof(sub_framework_command) + strlen(umbrellaName) + 1));
+ sub_framework_command* ac = (sub_framework_command*)appendLoadCommand(LC_SUB_FRAMEWORK, alignedSize);
+ ac->umbrella.offset = sizeof(sub_framework_command);
+ strcpy((char*)ac + ac->umbrella.offset, umbrellaName);
+}
+
+void Header::addSourceVersion(Version64 vers)
+{
+ source_version_command svc;
+ svc.cmd = LC_SOURCE_VERSION;
+ svc.cmdsize = sizeof(source_version_command);
+ svc.version = vers.value();
+ appendLoadCommand((load_command*)&svc);
+}
+
+void Header::setMain(uint32_t offset)
+{
+ entry_point_command ec;
+ ec.cmd = LC_MAIN;
+ ec.cmdsize = sizeof(entry_point_command);
+ ec.entryoff = offset;
+ ec.stacksize = 0;
+ appendLoadCommand((load_command*)&ec);
+}
+
+void Header::setCustomStackSize(uint64_t stackSize) {
+ __block bool found = false;
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if (cmd->cmd == LC_MAIN) {
+ entry_point_command* ec = (entry_point_command*)cmd;
+ ec->stacksize = stackSize;
+ found = true;
+ stop = true;
+ }
+ });
+ assert(found);
+}
+
+void Header::setUnixEntry(uint64_t startAddr)
+{
+ // FIXME: support other archs
+ if ( (mh.cputype == CPU_TYPE_ARM64) || (mh.cputype == CPU_TYPE_ARM64_32) ) {
+ uint32_t lcSize = 288;
+ uint32_t* words = (uint32_t*)appendLoadCommand(LC_UNIXTHREAD, lcSize);
+ words[2] = 6; // flavor = ARM_THREAD_STATE64
+ words[3] = 68; // count = ARM_EXCEPTION_STATE64_COUNT
+ bzero(&words[4], lcSize-16);
+ *(uint64_t*)(&words[68]) = startAddr; // register pc = startAddr
+ }
+ else if ( mh.cputype == CPU_TYPE_X86_64 ) {
+ uint32_t lcSize = 184;
+ uint32_t* words = (uint32_t*)appendLoadCommand(LC_UNIXTHREAD, lcSize);
+ words[2] = 4; // flavor = x86_THREAD_STATE64
+ words[3] = 42; // count = x86_THREAD_STATE64_COUNT
+ bzero(&words[4], lcSize-16);
+ *(uint64_t*)(&words[36]) = startAddr; // register pc = startAddr
+ }
+ else {
+ assert(0 && "arch not supported");
+ }
+}
+
+void Header::addCodeSignature(uint32_t fileOffset, uint32_t fileSize)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_CODE_SIGNATURE;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = fileOffset;
+ lc.datasize = fileSize;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setBindOpcodesInfo(uint32_t rebaseOffset, uint32_t rebaseSize,
+ uint32_t bindsOffset, uint32_t bindsSize,
+ uint32_t weakBindsOffset, uint32_t weakBindsSize,
+ uint32_t lazyBindsOffset, uint32_t lazyBindsSize,
+ uint32_t exportTrieOffset, uint32_t exportTrieSize)
+{
+ dyld_info_command lc;
+ lc.cmd = LC_DYLD_INFO_ONLY;
+ lc.cmdsize = sizeof(dyld_info_command);
+ lc.rebase_off = rebaseOffset;
+ lc.rebase_size = rebaseSize;
+ lc.bind_off = bindsOffset;
+ lc.bind_size = bindsSize;
+ lc.weak_bind_off = weakBindsOffset;
+ lc.weak_bind_size = weakBindsSize;
+ lc.lazy_bind_off = lazyBindsOffset;
+ lc.lazy_bind_size = lazyBindsSize;
+ lc.export_off = exportTrieOffset;
+ lc.export_size = exportTrieSize;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setChainedFixupsInfo(uint32_t cfOffset, uint32_t cfSize)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_DYLD_CHAINED_FIXUPS;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = cfOffset;
+ lc.datasize = cfSize;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setExportTrieInfo(uint32_t offset, uint32_t size)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_DYLD_EXPORTS_TRIE;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = offset;
+ lc.datasize = size;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setSplitSegInfo(uint32_t offset, uint32_t size)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_SEGMENT_SPLIT_INFO;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = offset;
+ lc.datasize = size;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setDataInCode(uint32_t offset, uint32_t size)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_DATA_IN_CODE;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = offset;
+ lc.datasize = size;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setFunctionStarts(uint32_t offset, uint32_t size)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_FUNCTION_STARTS;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = offset;
+ lc.datasize = size;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setAtomInfo(uint32_t offset, uint32_t size)
+{
+ linkedit_data_command lc;
+ lc.cmd = LC_ATOM_INFO;
+ lc.cmdsize = sizeof(linkedit_data_command);
+ lc.dataoff = offset;
+ lc.datasize = size;
+ appendLoadCommand((load_command*)&lc);
+}
+
+void Header::setSymbolTable(uint32_t nlistOffset, uint32_t nlistCount, uint32_t stringPoolOffset, uint32_t stringPoolSize,
+ uint32_t localsCount, uint32_t globalsCount, uint32_t undefCount, uint32_t indOffset, uint32_t indCount)
+{
+ symtab_command stc;
+ stc.cmd = LC_SYMTAB;
+ stc.cmdsize = sizeof(symtab_command);
+ stc.symoff = nlistOffset;
+ stc.nsyms = nlistCount;
+ stc.stroff = stringPoolOffset;
+ stc.strsize = stringPoolSize;
+ appendLoadCommand((load_command*)&stc);
+
+ dysymtab_command dstc;
+ bzero(&dstc, sizeof(dstc));
+ dstc.cmd = LC_DYSYMTAB;
+ dstc.cmdsize = sizeof(dysymtab_command);
+ dstc.ilocalsym = 0;
+ dstc.nlocalsym = localsCount;
+ dstc.iextdefsym = localsCount;
+ dstc.nextdefsym = globalsCount;
+ dstc.iundefsym = localsCount+globalsCount;
+ dstc.nundefsym = undefCount;
+ dstc.indirectsymoff = indOffset;
+ dstc.nindirectsyms = indCount;
+ appendLoadCommand((load_command*)&dstc);
+}
+
+void Header::addLinkerOption(std::span<uint8_t> buffer, uint32_t count)
+{
+ uint32_t cmdSize = pointerAligned(sizeof(linker_option_command) + (uint32_t)buffer.size());
+
+ linker_option_command* lc = (linker_option_command*)appendLoadCommand(LC_LINKER_OPTION, cmdSize);
+ lc->cmd = LC_LINKER_OPTION;
+ lc->cmdsize = cmdSize;
+ lc->count = count;
+ memcpy((uint8_t*)(lc + 1), buffer.data(), buffer.size());
+}
+
+Header::LinkerOption Header::LinkerOption::make(std::span<CString> opts)
+{
+ LinkerOption out;
+ out.count = (uint32_t)opts.size();
+ assert(out.count == opts.size());
+ for ( CString option : opts ) {
+ if ( option.empty() )
+ continue;
+ size_t previousSize = out.buffer.size();
+ out.buffer.resize(previousSize + option.size() + 1);
+ option.strcpy((char*)out.buffer.data() + previousSize);
+ }
+ return out;
+}
+
+load_command* Header::findLoadCommand(uint32_t cmdNum)
+{
+ __block load_command* result = nullptr;
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == cmdNum ) {
+ result = (load_command*)cmd;
+ stop = true;
+ }
+ });
+ return result;
+}
+
+void Header::removeLoadCommand(void (^callback)(const load_command* cmd, bool& remove, bool& stop))
+{
+ bool stop = false;
+ const load_command* startCmds = nullptr;
+ if ( mh.magic == MH_MAGIC_64 )
+ startCmds = (load_command*)((char*)this + sizeof(mach_header_64));
+ else if ( mh.magic == MH_MAGIC )
+ startCmds = (load_command*)((char*)this + sizeof(mach_header));
+ else if ( hasMachOBigEndianMagic() )
+ return; // can't process big endian mach-o
+ else {
+ //const uint32_t* h = (uint32_t*)this;
+ //diag.error("file does not start with MH_MAGIC[_64]: 0x%08X 0x%08X", h[0], h [1]);
+ return; // not a mach-o file
+ }
+ const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh.sizeofcmds);
+ auto cmd = (load_command*)startCmds;
+ const uint32_t origNcmds = mh.ncmds;
+ unsigned bytesRemaining = mh.sizeofcmds;
+ for ( uint32_t i = 0; i < origNcmds; ++i ) {
+ bool remove = false;
+ auto nextCmd = (load_command*)((char*)cmd + cmd->cmdsize);
+ if ( cmd->cmdsize < 8 ) {
+ //diag.error("malformed load command #%d of %d at %p with mh=%p, size (0x%X) too small", i, mh.ncmds, cmd, this, cmd->cmdsize);
+ return;
+ }
+ if ( (nextCmd > cmdsEnd) || (nextCmd < startCmds) ) {
+ //diag.error("malformed load command #%d of %d at %p with mh=%p, size (0x%X) is too large, load commands end at %p", i, mh.ncmds, cmd, this, cmd->cmdsize, cmdsEnd);
+ return;
+ }
+ callback(cmd, remove, stop);
+ if ( remove ) {
+ mh.sizeofcmds -= cmd->cmdsize;
+ ::memmove((void*)cmd, (void*)nextCmd, bytesRemaining);
+ mh.ncmds--;
+ }
+ else {
+ bytesRemaining -= cmd->cmdsize;
+ cmd = nextCmd;
+ }
+ if ( stop )
+ break;
+ }
+ if ( cmd )
+ ::bzero(cmd, bytesRemaining);
+}
+
+uint32_t Header::relocatableHeaderAndLoadCommandsSize(bool is64, uint32_t sectionCount, uint32_t platformsCount, std::span<const Header::LinkerOption> linkerOptions)
+{
+ uint32_t size = 0;
+ if ( is64 ) {
+ size += sizeof(mach_header_64);
+ size += sizeof(segment_command_64);
+ size += sizeof(section_64) * sectionCount;
+ }
+ else {
+ size += sizeof(mach_header);
+ size += sizeof(segment_command);
+ size += sizeof(section) * sectionCount;
+ }
+ size += sizeof(symtab_command);
+ size += sizeof(dysymtab_command);
+ size += sizeof(build_version_command) * platformsCount;
+ size += sizeof(linkedit_data_command);
+
+ for ( Header::LinkerOption opt : linkerOptions ) {
+ size += opt.lcSize();
+ }
+ return size;
+}
+
+void Header::setRelocatableSectionCount(uint32_t sectionCount)
+{
+ assert(mh.filetype == MH_OBJECT);
+ if ( is64() ) {
+ uint32_t lcSize = (uint32_t)(sizeof(segment_command_64) + sectionCount * sizeof(section_64));
+ segment_command_64* sc = (segment_command_64*)appendLoadCommand(LC_SEGMENT_64, lcSize);
+ sc->segname[0] = '\0'; // MH_OBJECT has one segment with no name
+ sc->vmaddr = 0;
+ sc->vmsize = 0; // adjusted in updateRelocatableSegmentSize()
+ sc->fileoff = 0;
+ sc->filesize = 0; // adjusted in updateRelocatableSegmentSize()
+ sc->initprot = 7;
+ sc->maxprot = 7;
+ sc->nsects = sectionCount;
+ // section info to be filled in later by setRelocatableSectionInfo()
+ bzero((uint8_t*)sc + sizeof(segment_command_64), sectionCount * sizeof(section_64));
+ }
+ else {
+ uint32_t lcSize = (uint32_t)(sizeof(segment_command) + sectionCount * sizeof(section));
+ segment_command* sc = (segment_command*)appendLoadCommand(LC_SEGMENT, lcSize);
+ sc->segname[0] = '\0'; // MH_OBJECT has one segment with no name
+ sc->vmaddr = 0;
+ sc->vmsize = 0x1000; // FIXME: need dynamic segment layout
+ sc->fileoff = 0;
+ sc->filesize = 0x1000;
+ sc->initprot = 7;
+ sc->maxprot = 7;
+ sc->nsects = sectionCount;
+ // section info to be filled in later by setRelocatableSectionInfo()
+ bzero((uint8_t*)sc + sizeof(segment_command), sectionCount * sizeof(struct section));
+ }
+}
+
+void Header::updateRelocatableSegmentSize(uint64_t vmSize, uint32_t fileSize)
+{
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == LC_SEGMENT ) {
+ segment_command* sc = (segment_command*)cmd;
+ sc->vmsize = (uint32_t)vmSize;
+ sc->filesize = fileSize;
+ stop = true;
+ }
+ else if ( cmd->cmd == LC_SEGMENT_64 ) {
+ segment_command_64* sc = (segment_command_64*)cmd;
+ sc->vmsize = vmSize;
+ sc->filesize = fileSize;
+ stop = true;
+ }
+ });
+}
+
+
+void Header::setRelocatableSectionInfo(uint32_t sectionIndex, const char* segName, const char* sectName,
+ uint32_t flags, uint64_t address, uint64_t size, uint32_t fileOffset,
+ uint16_t alignment, uint32_t relocsOffset, uint32_t relocsCount)
+{
+ __block struct section* section32 = nullptr;
+ __block struct section_64* section64 = nullptr;
+ forEachLoadCommandSafe(^(const load_command* cmd, bool& stop) {
+ if ( cmd->cmd == LC_SEGMENT ) {
+ struct section* sections = (struct section*)((uint8_t*)cmd + sizeof(segment_command));
+ section32 = §ions[sectionIndex];
+ stop = true;
+ }
+ else if ( cmd->cmd == LC_SEGMENT_64 ) {
+ struct section_64* sections = (struct section_64*)((uint8_t*)cmd + sizeof(segment_command_64));
+ section64 = §ions[sectionIndex];
+ stop = true;
+ }
+ });
+ if ( section64 != nullptr ) {
+ strncpy(section64->segname, segName, 16);
+ strncpy(section64->sectname, sectName, 16);
+ section64->addr = address;
+ section64->size = size;
+ section64->offset = fileOffset;
+ section64->align = alignment;
+ section64->reloff = relocsOffset;
+ section64->nreloc = relocsCount;
+ section64->flags = flags;
+ section64->reserved1 = 0;
+ section64->reserved2 = 0;
+ section64->reserved3 = 0;
+ }
+ else if ( section32 != nullptr ) {
+ strncpy(section32->segname, segName, 16);
+ strncpy(section32->sectname, sectName, 16);
+ section32->addr = (uint32_t)address;
+ section32->size = (uint32_t)size;
+ section32->offset = fileOffset;
+ section32->align = alignment;
+ section32->reloff = relocsOffset;
+ section32->nreloc = relocsCount;
+ section32->flags = flags;
+ section32->reserved1 = 0;
+ section32->reserved2 = 0;
+ }
+}
+
+#endif // BUILDING_MACHO_WRITER
} // namespace dyld3