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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| #import <UIKit/UIKit.h> | ||
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| @interface LCAppListViewController : UITableViewController <UIDocumentPickerDelegate> | ||
| @property(nonatomic) NSString* acError; | ||
| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| @import Darwin; | ||
| @import Foundation; | ||
| @import MachO; | ||
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| static uint32_t rnd32(uint32_t v, uint32_t r) { | ||
| r--; | ||
| return (v + r) & ~r; | ||
| } | ||
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| static void insertDylibCommand(uint32_t cmd, const char *path, struct mach_header_64 *header) { | ||
| const char *name = cmd==LC_ID_DYLIB ? basename((char *)path) : path; | ||
| struct dylib_command *dylib = (struct dylib_command *)(sizeof(struct mach_header_64) + (void *)header+header->sizeofcmds); | ||
| dylib->cmd = cmd; | ||
| dylib->cmdsize = sizeof(struct dylib_command) + rnd32((uint32_t)strlen(name) + 1, 8); | ||
| dylib->dylib.name.offset = sizeof(struct dylib_command); | ||
| dylib->dylib.compatibility_version = 0x10000; | ||
| dylib->dylib.current_version = 0x10000; | ||
| dylib->dylib.timestamp = 2; | ||
| strncpy((void *)dylib + dylib->dylib.name.offset, name, strlen(name)); | ||
| header->ncmds++; | ||
| header->sizeofcmds += dylib->cmdsize; | ||
| } | ||
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| static void patchExecSlice(const char *path, struct mach_header_64 *header) { | ||
| uint8_t *imageHeaderPtr = (uint8_t*)header + sizeof(struct mach_header_64); | ||
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| // Literally convert an executable to a dylib | ||
| if (header->magic == MH_MAGIC_64) { | ||
| //assert(header->flags & MH_PIE); | ||
| header->filetype = MH_DYLIB; | ||
| header->flags |= MH_NO_REEXPORTED_DYLIBS; | ||
| header->flags &= ~MH_PIE; | ||
| } | ||
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| BOOL hasDylibCommand = NO, | ||
| hasLoaderCommand = NO; | ||
| const char *tweakLoaderPath = "@loader_path/../../Tweaks/TweakLoader.dylib"; | ||
| struct load_command *command = (struct load_command *)imageHeaderPtr; | ||
| for(int i = 0; i < header->ncmds > 0; i++) { | ||
| if(command->cmd == LC_ID_DYLIB) { | ||
| hasDylibCommand = YES; | ||
| } else if(command->cmd == LC_LOAD_DYLIB) { | ||
| struct dylib_command *dylib = (struct dylib_command *)command; | ||
| char *dylibName = (void *)dylib + dylib->dylib.name.offset; | ||
| if (!strncmp(dylibName, tweakLoaderPath, strlen(tweakLoaderPath))) { | ||
| hasLoaderCommand = YES; | ||
| } | ||
| } | ||
| command = (struct load_command *)((void *)command + command->cmdsize); | ||
| } | ||
| if (!hasDylibCommand) { | ||
| insertDylibCommand(LC_ID_DYLIB, path, header); | ||
| } | ||
| if (!hasLoaderCommand) { | ||
| insertDylibCommand(LC_LOAD_DYLIB, tweakLoaderPath, header); | ||
| } | ||
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| // Patch __PAGEZERO to map just a single zero page, fixing "out of address space" | ||
| struct segment_command_64 *seg = (struct segment_command_64 *)imageHeaderPtr; | ||
| assert(seg->cmd == LC_SEGMENT_64); | ||
| if (seg->vmaddr == 0) { | ||
| assert(seg->vmsize == 0x100000000); | ||
| seg->vmaddr = 0x100000000 - 0x4000; | ||
| seg->vmsize = 0x4000; | ||
| } | ||
| } | ||
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| void LCPatchExecutable(const char *path, NSString **error) { | ||
| int fd = open(path, O_RDWR, (mode_t)0600); | ||
| struct stat s; | ||
| fstat(fd, &s); | ||
| void *map = mmap(NULL, s.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | ||
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| uint32_t magic = *(uint32_t *)map; | ||
| if (magic == FAT_CIGAM) { | ||
| // Find compatible slice | ||
| struct fat_header *header = (struct fat_header *)map; | ||
| struct fat_arch *arch = (struct fat_arch *)(map + sizeof(struct fat_header)); | ||
| for (int i = 0; i < OSSwapInt32(header->nfat_arch); i++) { | ||
| if (OSSwapInt32(arch->cputype) == CPU_TYPE_ARM64) { | ||
| patchExecSlice(path, (struct mach_header_64 *)(map + OSSwapInt32(arch->offset))); | ||
| } | ||
| arch = (struct fat_arch *)((void *)arch + sizeof(struct fat_arch)); | ||
| } | ||
| } else if (magic == MH_MAGIC_64) { | ||
| patchExecSlice(path, (struct mach_header_64 *)map); | ||
| } else { | ||
| *error = @"32-bit app is not supported"; | ||
| } | ||
|
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| msync(map, s.st_size, MS_SYNC); | ||
| munmap(map, s.st_size); | ||
| close(fd); | ||
| } |
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