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25 lines
998 B
25 lines
998 B
2 years ago
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Termux: Stub out some syscalls
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These syscalls are either blacklisted in Android's seccomp policy, or simply
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not implemented by the running kernel (android kernels lag behind quite a bit!).
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Whichever of the two it is, calling any of these results in the process being
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killed with SIGSYS, usually killing the entire process. To prevent this, we
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stub them with an ENOSYS result, pretending they aren't implemented.
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--- glibc-2.36.orig/sysdeps/unix/sysv/linux/aarch64/sysdep.h
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+++ glibc-2.36/sysdeps/unix/sysv/linux/aarch64/sysdep.h
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@@ -167,7 +167,11 @@
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# undef INTERNAL_SYSCALL_RAW
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# define INTERNAL_SYSCALL_RAW(name, nr, args...) \
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({ long _sys_result; \
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- { \
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+ switch (name) { \
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+ case SYS_ify(set_robust_list): \
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+ case SYS_ify(rseq): \
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+ case SYS_ify(faccessat2): \
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+ _sys_result = -ENOSYS; break; default: \
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LOAD_ARGS_##nr (args) \
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register long _x8 asm ("x8") = (name); \
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asm volatile ("svc 0 // syscall " # name \
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