khanhduytran0
ec04885ce5
Now that game can directly load macOS's JNA native library, libjnidispatch is removed.
71 lines
2.7 KiB
Objective-C
71 lines
2.7 KiB
Objective-C
#import <Foundation/Foundation.h>
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#include <libgen.h>
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#include <mach-o/fat.h>
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#include <mach-o/loader.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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extern int dyld_get_active_platform();
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static BOOL PLPatchMachOPlatformForSlice(const char *path, struct mach_header_64 *header) {
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uint8_t *imageHeaderPtr = (uint8_t*)header + sizeof(struct mach_header_64);
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struct load_command *command = (struct load_command *)imageHeaderPtr;
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for(int i = 0; i < header->ncmds; i++) {
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if (command->cmd == LC_BUILD_VERSION) {
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struct build_version_command *buildver = (struct build_version_command *)command;
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int activePlatform = dyld_get_active_platform();
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if (buildver->platform == activePlatform) return NO; // it is already set, stop
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buildver->platform = activePlatform; // set to current platform
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} else if (command->cmd == LC_LOAD_DYLIB) {
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struct dylib_command *dylib = (struct dylib_command *)command;
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char *dylibName = (void *)dylib + dylib->dylib.name.offset;
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char *verPtr = strstr(dylibName, "/Versions/");
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if (verPtr) {
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// Remove "/Versions/X"
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int lastComponentLen = strlen(dylibName) - (verPtr - dylibName) - 11;
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memmove(verPtr, verPtr + 11, lastComponentLen);
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verPtr[lastComponentLen] = '\0';
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}
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}
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command = (struct load_command *)((void *)command + command->cmdsize);
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}
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return YES;
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}
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BOOL PLPatchMachOPlatformForFile(const char *path) {
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int fd = open(path, O_RDWR, (mode_t)0600);
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if (fd == -1) return NO;
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struct stat s;
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fstat(fd, &s);
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void *map = mmap(NULL, s.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (!map) {
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close(fd);
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return NO;
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}
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BOOL patched = NO;
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uint32_t magic = *(uint32_t *)map;
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if (magic == FAT_CIGAM) {
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// Find compatible slice
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struct fat_header *header = (struct fat_header *)map;
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struct fat_arch *arch = (struct fat_arch *)(map + sizeof(struct fat_header));
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for (int i = 0; i < OSSwapInt32(header->nfat_arch); i++) {
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if (OSSwapInt32(arch->cputype) == CPU_TYPE_ARM64) {
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NSLog(@"[PojavLauncher] Patching %s", path);
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patched |= PLPatchMachOPlatformForSlice(path, (struct mach_header_64 *)(map + OSSwapInt32(arch->offset)));
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}
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arch = (struct fat_arch *)((void *)arch + sizeof(struct fat_arch));
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}
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} else if (magic == MH_MAGIC_64 && ((struct mach_header_64 *)map)->cputype == CPU_TYPE_ARM64) {
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patched = PLPatchMachOPlatformForSlice(path, (struct mach_header_64 *)map);
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}
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if (patched) msync(map, s.st_size, MS_SYNC);
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munmap(map, s.st_size);
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close(fd);
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return patched;
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}
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