3031a7e45e
With memtag_stack, each function is responsible for cleaning up allocation tags for its stack frame. Allocation tags for anything below SP must match the address tag in SP. Both vfork and longjmp implement non-local control transfer which abandons part of the stack without proper cleanup. Update allocation tags: * For longjmp, we know both source and destination values of SP. * For vfork, save the value of SP before exit() or exec*() - the only valid ways of ending the child process according to POSIX - and reset tags from there to SP-in-parent. This is not 100% solid and can be confused by a number of hopefully uncommon conditions: * Segmented stacks. * Longjmp from sigaltstack into the main stack. * Some kind of userspace thread implementation using longjmp (that's UB, longjmp can only return to the caller on the current stack). * and other strange things. This change adds a sanity limit on the size of the tag cleanup. Also, this logic is only activated in the binaries that carry the NT_MEMTAG_STACK note (set by -fsanitize=memtag-stack) which is meant as a debugging configuration, is not compatible with pre-armv9 CPUs, and should not be set on production code. Bug: b/174878242 Test: fvp_mini with ToT LLVM (more test in a separate change) Change-Id: Ibef8b2fc5a6ce85c8e562dead1019964d9f6b80b
370 lines
19 KiB
Text
370 lines
19 KiB
Text
# This file is used to automatically generate bionic's system call stubs.
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#
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# Each non-blank, non-comment line has the following format:
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#
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# return_type func_name[|alias_list][:syscall_name[:socketcall_id]]([parameter_list]) arch_list
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#
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# where:
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# arch_list ::= "all" | arches
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# arches ::= arch | arch "," arches
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# arch ::= "arm" | "arm64" | "x86" | "x86_64" | "lp32" | "lp64"
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#
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# Note:
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# - syscall_name corresponds to the name of the syscall, which may differ from
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# the exported function name (example: the exit syscall is implemented by the _exit()
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# function, which is not the same as the standard C exit() function which calls it)
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#
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# - alias_list is optional comma separated list of function aliases.
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#
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# - The call_id parameter, given that func_name and syscall_name have
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# been provided, allows the user to specify dispatch style syscalls.
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# For example, socket() syscall on i386 actually becomes:
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# socketcall(__NR_socket, 1, *(rest of args on stack)).
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#
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# - Each parameter type is assumed to be stored in 32 bits.
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#
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# This file is processed by a python script named gensyscalls.py, run via
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# genrules in Android.bp.
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int __execve:execve(const char*, char* const*, char* const*) all
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uid_t getuid:getuid32() lp32
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uid_t getuid:getuid() lp64
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gid_t getgid:getgid32() lp32
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gid_t getgid:getgid() lp64
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uid_t geteuid:geteuid32() lp32
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uid_t geteuid:geteuid() lp64
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gid_t getegid:getegid32() lp32
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gid_t getegid:getegid() lp64
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uid_t getresuid:getresuid32(uid_t* ruid, uid_t* euid, uid_t* suid) lp32
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uid_t getresuid:getresuid(uid_t* ruid, uid_t* euid, uid_t* suid) lp64
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gid_t getresgid:getresgid32(gid_t* rgid, gid_t* egid, gid_t* sgid) lp32
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gid_t getresgid:getresgid(gid_t* rgid, gid_t* egid, gid_t* sgid) lp64
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ssize_t readahead(int, off64_t, size_t) all
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int getgroups:getgroups32(int, gid_t*) lp32
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int getgroups:getgroups(int, gid_t*) lp64
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pid_t getpgid(pid_t) all
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pid_t getppid() all
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pid_t getsid(pid_t) all
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pid_t setsid() all
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int setgid:setgid32(gid_t) lp32
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int setgid:setgid(gid_t) lp64
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int setuid:setuid32(uid_t) lp32
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int setuid:setuid(uid_t) lp64
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int setreuid:setreuid32(uid_t, uid_t) lp32
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int setreuid:setreuid(uid_t, uid_t) lp64
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int setresuid:setresuid32(uid_t, uid_t, uid_t) lp32
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int setresuid:setresuid(uid_t, uid_t, uid_t) lp64
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int setresgid:setresgid32(gid_t, gid_t, gid_t) lp32
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int setresgid:setresgid(gid_t, gid_t, gid_t) lp64
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void* __brk:brk(void*) all
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int kill(pid_t, int) all
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int tgkill(pid_t tgid, pid_t tid, int sig) all
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int __ptrace:ptrace(int request, int pid, void* addr, void* data) all
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# <sys/resource.h>
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int getrusage(int, struct rusage*) all
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int __getpriority:getpriority(int, id_t) all
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int setpriority(int, id_t, int) all
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# On LP64, rlimit and rlimit64 are the same.
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# On 32-bit systems we use prlimit64 to implement the rlimit64 functions.
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int getrlimit:ugetrlimit(int, struct rlimit*) lp32
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int getrlimit|getrlimit64(int, struct rlimit*) lp64
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int setrlimit(int, const struct rlimit*) lp32
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int setrlimit|setrlimit64(int, const struct rlimit*) lp64
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int prlimit64|prlimit(pid_t, int, struct rlimit64*, const struct rlimit64*) lp64
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int prlimit64(pid_t, int, struct rlimit64*, const struct rlimit64*) lp32
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int setgroups:setgroups32(int, const gid_t*) lp32
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int setgroups:setgroups(int, const gid_t*) lp64
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int setpgid(pid_t, pid_t) all
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int setregid:setregid32(gid_t, gid_t) lp32
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int setregid:setregid(gid_t, gid_t) lp64
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int chroot(const char*) all
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int prctl(int, unsigned long, unsigned long, unsigned long, unsigned long) all
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long __arch_prctl:arch_prctl(int, unsigned long) x86_64
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int capget(cap_user_header_t header, cap_user_data_t data) all
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int capset(cap_user_header_t header, const cap_user_data_t data) all
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int sigaltstack(const stack_t*, stack_t*) all
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int acct(const char* filepath) all
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# file descriptors
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ssize_t read(int, void*, size_t) all
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ssize_t write(int, const void*, size_t) all
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ssize_t pread64(int, void*, size_t, off64_t) lp32
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ssize_t pread64|pread(int, void*, size_t, off_t) lp64
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ssize_t pwrite64(int, void*, size_t, off64_t) lp32
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ssize_t pwrite64|pwrite(int, void*, size_t, off_t) lp64
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# On LP32, preadv/pwritev don't use off64_t --- they use pairs of 32-bit
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# arguments to avoid problems on architectures like arm32 where 64-bit arguments
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# must be in a register pair starting with an even-numbered register.
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# See linux/fs/read_write.c and https://lwn.net/Articles/311630/.
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# Note that there's an unused always-0 second long even on LP64!
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ssize_t __preadv64:preadv(int, const struct iovec*, int, long, long) all
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ssize_t __pwritev64:pwritev(int, const struct iovec*, int, long, long) all
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ssize_t __preadv64v2:preadv2(int, const struct iovec*, int, long, long, int) all
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ssize_t __pwritev64v2:pwritev2(int, const struct iovec*, int, long, long, int) all
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int __close:close(int) all
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int close_range(unsigned int, unsigned int, int) all
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ssize_t copy_file_range(int, off64_t*, int, off64_t*, size_t, unsigned int) all
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pid_t __getpid:getpid() all
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int memfd_create(const char*, unsigned) all
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int munmap(void*, size_t) all
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void* __mremap:mremap(void*, size_t, size_t, int, void*) all
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int msync(const void*, size_t, int) all
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int mprotect(const void*, size_t, int) all
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int madvise(void*, size_t, int) all
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ssize_t process_madvise(int, const struct iovec*, size_t, int, unsigned int) all
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int mlock(const void* addr, size_t len) all
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int mlock2(const void* addr, size_t len, int flags) all
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int munlock(const void* addr, size_t len) all
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int mlockall(int flags) all
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int munlockall() all
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int mincore(void* start, size_t length, unsigned char* vec) all
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int __ioctl:ioctl(int, int, void*) all
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ssize_t readv(int, const struct iovec*, int) all
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ssize_t writev(int, const struct iovec*, int) all
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int __fcntl64:fcntl64(int, int, void*) lp32
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int __fcntl:fcntl(int, int, void*) lp64
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int flock(int, int) all
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int __fchmod:fchmod(int, mode_t) all
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int __pipe2:pipe2(int*, int) all
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int __dup:dup(int) all
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int __dup3:dup3(int, int, int) all
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int fsync(int) all
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int fdatasync(int) all
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int fchown:fchown32(int, uid_t, gid_t) lp32
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int fchown:fchown(int, uid_t, gid_t) lp64
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void sync(void) all
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int syncfs(int) all
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int __fsetxattr:fsetxattr(int, const char*, const void*, size_t, int) all
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ssize_t __fgetxattr:fgetxattr(int, const char*, void*, size_t) all
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ssize_t __flistxattr:flistxattr(int, char*, size_t) all
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int fremovexattr(int, const char*) all
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int __getdents64:getdents64(unsigned int, struct dirent*, unsigned int) all
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int __openat:openat(int, const char*, int, mode_t) all
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int __faccessat:faccessat(int, const char*, int) all
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int __fchmodat:fchmodat(int, const char*, mode_t) all
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int fchownat(int, const char*, uid_t, gid_t, int) all
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int fstatat64|fstatat:fstatat64(int, const char*, struct stat*, int) lp32
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int fstatat64|fstatat:newfstatat(int, const char*, struct stat*, int) lp64
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int linkat(int, const char*, int, const char*, int) all
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int mkdirat(int, const char*, mode_t) all
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int mknodat(int, const char*, mode_t, dev_t) all
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int readlinkat(int, const char*, char*, size_t) all
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int renameat(int, const char*, int, const char*) all
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int renameat2(int, const char*, int, const char*, unsigned) all
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int symlinkat(const char*, int, const char*) all
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int unlinkat(int, const char*, int) all
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int utimensat(int, const char*, const struct timespec times[2], int) all
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# Paired off_t/off64_t system calls. On 64-bit systems,
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# sizeof(off_t) == sizeof(off64_t), so there we emit two symbols that are
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# aliases. On 32-bit systems, we have two different system calls.
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# That means that every system call in this section should take three lines.
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off_t lseek(int, off_t, int) lp32
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int __llseek:_llseek(int, unsigned long, unsigned long, off64_t*, int) lp32
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off_t lseek|lseek64(int, off_t, int) lp64
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int ftruncate64(int, off64_t) lp32
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int ftruncate|ftruncate64(int, off_t) lp64
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ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count) lp32
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ssize_t sendfile64(int out_fd, int in_fd, off64_t* offset, size_t count) lp32
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ssize_t sendfile|sendfile64(int out_fd, int in_fd, off_t* offset, size_t count) lp64
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int truncate(const char*, off_t) lp32
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int truncate64(const char*, off64_t) lp32
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int truncate|truncate64(const char*, off_t) lp64
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# (mmap only gets two lines because we only used the 64-bit variant on 32-bit systems.)
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void* __mmap2:mmap2(void*, size_t, int, int, int, long) lp32
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void* mmap|mmap64(void*, size_t, int, int, int, off_t) lp64
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# (fallocate only gets two lines because there is no 32-bit variant.)
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int fallocate64:fallocate(int, int, off64_t, off64_t) lp32
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int fallocate|fallocate64(int, int, off_t, off_t) lp64
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# posix_fadvise64 is awkward: arm has shuffled arguments,
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# the POSIX functions don't set errno, and no architecture has posix_fadvise.
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int __arm_fadvise64_64:arm_fadvise64_64(int, int, off64_t, off64_t) arm
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int __fadvise64:fadvise64_64(int, off64_t, off64_t, int) x86
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int __fadvise64:fadvise64(int, off64_t, off64_t, int) lp64
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int __fstatfs64:fstatfs64(int, size_t, struct statfs*) lp32
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int __fstatfs:fstatfs(int, struct statfs*) lp64
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int __statfs64:statfs64(const char*, size_t, struct statfs*) lp32
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int __statfs:statfs(const char*, struct statfs*) lp64
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int fstat64|fstat:fstat64(int, struct stat*) lp32
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int fstat64|fstat:fstat(int, struct stat*) lp64
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# file system
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int chdir(const char*) all
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int mount(const char*, const char*, const char*, unsigned long, const void*) all
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int umount2(const char*, int) all
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int __getcwd:getcwd(char* buf, size_t size) all
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int fchdir(int) all
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int setxattr(const char*, const char*, const void*, size_t, int) all
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int lsetxattr(const char*, const char*, const void*, size_t, int) all
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ssize_t getxattr(const char*, const char*, void*, size_t) all
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ssize_t lgetxattr(const char*, const char*, void*, size_t) all
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ssize_t listxattr(const char*, char*, size_t) all
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ssize_t llistxattr(const char*, char*, size_t) all
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int removexattr(const char*, const char*) all
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int lremovexattr(const char*, const char*) all
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int statx(int, const char*, int, unsigned, struct statx*) all
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int swapon(const char*, int) all
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int swapoff(const char*) all
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# time
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int settimeofday(const struct timeval*, const struct timezone*) all
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clock_t times(struct tms*) all
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int nanosleep(const struct timespec*, struct timespec*) all
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int clock_settime(clockid_t, const struct timespec*) all
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int __clock_nanosleep:clock_nanosleep(clockid_t, int, const struct timespec*, struct timespec*) all
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int getitimer(int, struct itimerval*) all
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int setitimer(int, const struct itimerval*, struct itimerval*) all
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int __timer_create:timer_create(clockid_t clockid, struct sigevent* evp, __kernel_timer_t* timerid) all
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int __timer_settime:timer_settime(__kernel_timer_t, int, const struct itimerspec*, struct itimerspec*) all
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int __timer_gettime:timer_gettime(__kernel_timer_t, struct itimerspec*) all
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int __timer_getoverrun:timer_getoverrun(__kernel_timer_t) all
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int __timer_delete:timer_delete(__kernel_timer_t) all
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int timerfd_create(clockid_t, int) all
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int timerfd_settime(int, int, const struct itimerspec*, struct itimerspec*) all
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int timerfd_gettime(int, struct itimerspec*) all
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int adjtimex(struct timex*) all
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int clock_adjtime(clockid_t, struct timex*) all
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# signals
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int __sigaction:sigaction(int, const struct sigaction*, struct sigaction*) lp32
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int __rt_sigaction:rt_sigaction(int, const struct sigaction*, struct sigaction*, size_t) all
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int __rt_sigpending:rt_sigpending(sigset64_t*, size_t) all
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int __rt_sigprocmask:rt_sigprocmask(int, const sigset64_t*, sigset64_t*, size_t) all
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int __rt_sigsuspend:rt_sigsuspend(const sigset64_t*, size_t) all
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int __rt_sigtimedwait:rt_sigtimedwait(const sigset64_t*, siginfo_t*, const timespec*, size_t) all
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int __rt_sigqueueinfo:rt_sigqueueinfo(pid_t, int, siginfo_t*) all
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int __signalfd4:signalfd4(int, const sigset64_t*, size_t, int) all
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# sockets
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int __socket:socket(int, int, int) arm,lp64
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int __socketpair:socketpair(int, int, int, int*) arm,lp64
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int bind(int, struct sockaddr*, socklen_t) arm,lp64
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int __connect:connect(int, struct sockaddr*, socklen_t) arm,lp64
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int listen(int, int) arm,lp64
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int __accept4:accept4(int, struct sockaddr*, socklen_t*, int) arm,lp64
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int getsockname(int, struct sockaddr*, socklen_t*) arm,lp64
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int getpeername(int, struct sockaddr*, socklen_t*) arm,lp64
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ssize_t __sendto:sendto(int, const void*, size_t, int, const struct sockaddr*, socklen_t) arm,lp64
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ssize_t recvfrom(int, void*, size_t, unsigned int, struct sockaddr*, socklen_t*) arm,lp64
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int shutdown(int, int) arm,lp64
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int setsockopt(int, int, int, const void*, socklen_t) arm,lp64
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int getsockopt(int, int, int, void*, socklen_t*) arm,lp64
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ssize_t __recvmsg:recvmsg(int, struct msghdr*, unsigned int) arm,lp64
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ssize_t __sendmsg:sendmsg(int, const struct msghdr*, unsigned int) arm,lp64
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int __recvmmsg:recvmmsg(int, struct mmsghdr*, unsigned int, int, const struct timespec*) arm,lp64
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int __sendmmsg:sendmmsg(int, struct mmsghdr*, unsigned int, int) arm,lp64
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# sockets for x86. These are done as an "indexed" call to socketcall syscall.
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int __socket:socketcall:1(int, int, int) x86
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int bind:socketcall:2(int, struct sockaddr*, int) x86
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int __connect:socketcall:3(int, struct sockaddr*, socklen_t) x86
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int listen:socketcall:4(int, int) x86
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int getsockname:socketcall:6(int, struct sockaddr*, socklen_t*) x86
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int getpeername:socketcall:7(int, struct sockaddr*, socklen_t*) x86
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int __socketpair:socketcall:8(int, int, int, int*) x86
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ssize_t __sendto:socketcall:11(int, const void*, size_t, int, const struct sockaddr*, socklen_t) x86
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ssize_t recvfrom:socketcall:12(int, void*, size_t, unsigned int, struct sockaddr*, socklen_t*) x86
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int shutdown:socketcall:13(int, int) x86
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int setsockopt:socketcall:14(int, int, int, const void*, socklen_t) x86
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int getsockopt:socketcall:15(int, int, int, void*, socklen_t*) x86
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int __sendmsg:socketcall:16(int, const struct msghdr*, unsigned int) x86
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int __recvmsg:socketcall:17(int, struct msghdr*, unsigned int) x86
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int __accept4:socketcall:18(int, struct sockaddr*, socklen_t*, int) x86
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int __recvmmsg:socketcall:19(int, struct mmsghdr*, unsigned int, int, const struct timespec*) x86
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int __sendmmsg:socketcall:20(int, struct mmsghdr*, unsigned int, int) x86
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# scheduler & real-time
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int sched_setscheduler(pid_t pid, int policy, const struct sched_param* param) all
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int sched_getscheduler(pid_t pid) all
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int sched_yield(void) all
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int sched_setparam(pid_t pid, const struct sched_param* param) all
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int sched_getparam(pid_t pid, struct sched_param* param) all
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int sched_get_priority_max(int policy) all
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int sched_get_priority_min(int policy) all
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int sched_rr_get_interval(pid_t pid, struct timespec* interval) all
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int sched_setaffinity(pid_t pid, size_t setsize, const cpu_set_t* set) all
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int setns(int, int) all
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int unshare(int) all
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int __sched_getaffinity:sched_getaffinity(pid_t pid, size_t setsize, cpu_set_t* set) all
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int __getcpu:getcpu(unsigned*, unsigned*, void*) all
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# other
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int uname(struct utsname*) all
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mode_t umask(mode_t) all
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int __reboot:reboot(int, int, int, void*) all
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int init_module(void*, unsigned long, const char*) all
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int delete_module(const char*, unsigned int) all
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int klogctl:syslog(int, char*, int) all
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int sysinfo(struct sysinfo*) all
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int personality(unsigned long) all
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int bpf(int, union bpf_attr *, unsigned int) all
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ssize_t tee(int, int, size_t, unsigned int) all
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ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int) all
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ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int) all
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int __epoll_create1:epoll_create1(int) all
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int epoll_ctl(int, int op, int, struct epoll_event*) all
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int __epoll_pwait:epoll_pwait(int, struct epoll_event*, int, int, const sigset64_t*, size_t) all
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int __eventfd:eventfd2(unsigned int, int) all
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void __exit_group:exit_group(int) all
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void __exit:exit(int) all
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int inotify_init1(int) all
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int inotify_add_watch(int, const char*, unsigned int) all
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int inotify_rm_watch(int, unsigned int) all
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int __pselect6:pselect6(int, fd_set*, fd_set*, fd_set*, timespec*, void*) all
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int __ppoll:ppoll(pollfd*, unsigned int, timespec*, const sigset64_t*, size_t) all
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ssize_t process_vm_readv(pid_t, const struct iovec*, unsigned long, const struct iovec*, unsigned long, unsigned long) all
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ssize_t process_vm_writev(pid_t, const struct iovec*, unsigned long, const struct iovec*, unsigned long, unsigned long) all
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int quotactl(int, const char*, int, char*) all
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int __set_tid_address:set_tid_address(int*) all
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int setfsgid(gid_t) all
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int setfsuid(uid_t) all
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int setdomainname(const char*, size_t) all
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int sethostname(const char*, size_t) all
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int __sync_file_range:sync_file_range(int, off64_t, off64_t, unsigned int) x86,lp64
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int __sync_file_range2:sync_file_range2(int, unsigned int, off64_t, off64_t) arm
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pid_t wait4(pid_t, int*, int, struct rusage*) all
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int __waitid:waitid(int, pid_t, siginfo_t*, int, void*) all
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# ARM-specific
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int __set_tls:__ARM_NR_set_tls(void*) arm
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int cacheflush:__ARM_NR_cacheflush(long start, long end, long flags) arm
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# x86-specific
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int __set_thread_area:set_thread_area(void*) x86
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# vdso stuff.
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int __clock_getres:clock_getres(clockid_t, struct timespec*) all
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int __clock_gettime:clock_gettime(clockid_t, struct timespec*) all
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int __gettimeofday:gettimeofday(struct timeval*, struct timezone*) all
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# <sys/random.h>
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ssize_t getrandom(void*, size_t, unsigned) all
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# <sys/pidfd.h>
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int __pidfd_open:pidfd_open(pid_t, unsigned int) all
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int __pidfd_getfd:pidfd_getfd(int, int, unsigned int) all
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int pidfd_send_signal(int, int, siginfo_t*, unsigned int) all
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