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add: Android 9 support (#117)

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This commit makes ReZygisk load Zygisk libraries directly, not utilizing memfd, as it doesn't exist in older versions of Android.
This commit is contained in:
Reveny
2025-03-22 23:12:24 +01:00
committed by GitHub
parent bc6cf67c7b
commit 92e2f528a9
5 changed files with 34 additions and 32 deletions
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30
zygiskd/src/zygiskd.c
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@@ -83,35 +83,7 @@ int create_library_fd(const char *restrict so_path) {
return -1;
}
/* INFO: This is required as older implementations of glibc may not
have the memfd_create function call, causing a crash. */
int memfd = (int)syscall(SYS_memfd_create, "jit-cache-zygisk", MFD_ALLOW_SEALING);
if (memfd == -1) {
LOGE("Failed creating memfd: %s\n", strerror(errno));
return -1;
}
if (sendfile(memfd, so_fd, NULL, (size_t)so_size) == -1) {
LOGE("Failed copying so file to memfd: %s\n", strerror(errno));
close(so_fd);
close(memfd);
return -1;
}
close(so_fd);
if (fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL) == -1) {
LOGE("Failed sealing memfd: %s\n", strerror(errno));
close(memfd);
return -1;
}
return memfd;
return so_fd;
}
/* WARNING: Dynamic memory based */