AArch64: Add support for AArch64 to the syscall interface

This patch adds support for AArch64 to the syscall interface. The kernel
implementation exports a set of canonical syscalls, therefore some of
the userspace exported syscalls are implemented as stubs based on the
canonical set.

Change-Id: Ia965d71e97769b8be9d7655193fc40303964c4df
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>

diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index ca1784f..f31073f 100644 (file)
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -6,7 +6,7 @@
 #
 # where:
 #       arch_list ::= "all" | arch+
-#       arch      ::= "arm" | "mips" | "x86" | "x86_64"
+#       arch      ::= "aarch64" | "arm" | "mips" | "x86" | "x86_64"
 #
 # Note:
 #      - syscall_name corresponds to the name of the syscall, which may differ from
@@ -27,54 +27,54 @@
 int     execve(const char*, char* const*, char* const*)  all
 
 uid_t   getuid:getuid32()         arm,x86
-uid_t   getuid:getuid()           mips,x86_64
+uid_t   getuid:getuid()           aarch64,mips,x86_64
 gid_t   getgid:getgid32()         arm,x86
-gid_t   getgid:getgid()           mips,x86_64
+gid_t   getgid:getgid()           aarch64,mips,x86_64
 uid_t   geteuid:geteuid32()       arm,x86
-uid_t   geteuid:geteuid()         mips,x86_64
+uid_t   geteuid:geteuid()         aarch64,mips,x86_64
 gid_t   getegid:getegid32()       arm,x86
-gid_t   getegid:getegid()         mips,x86_64
+gid_t   getegid:getegid()         aarch64,mips,x86_64
 uid_t   getresuid:getresuid32(uid_t* ruid, uid_t* euid, uid_t* suid)   arm,x86
-uid_t   getresuid:getresuid(uid_t* ruid, uid_t* euid, uid_t* suid)     mips,x86_64
+uid_t   getresuid:getresuid(uid_t* ruid, uid_t* euid, uid_t* suid)     aarch64,mips,x86_64
 gid_t   getresgid:getresgid32(gid_t* rgid, gid_t* egid, gid_t* sgid)   arm,x86
-gid_t   getresgid:getresgid(gid_t* rgid, gid_t* egid, gid_t* sgid)     mips,x86_64
+gid_t   getresgid:getresgid(gid_t* rgid, gid_t* egid, gid_t* sgid)     aarch64,mips,x86_64
 pid_t   gettid()                   all
 ssize_t readahead(int, off64_t, size_t)     all
 int     getgroups:getgroups32(int, gid_t*)    arm,x86
-int     getgroups:getgroups(int, gid_t*)      mips,x86_64
+int     getgroups:getgroups(int, gid_t*)      aarch64,mips,x86_64
 pid_t   getpgid(pid_t)             all
 pid_t   getppid()                  all
 pid_t   getsid(pid_t)              all
 pid_t   setsid()                   all
 int     setgid:setgid32(gid_t)     arm,x86
-int     setgid:setgid(gid_t)       mips,x86_64
+int     setgid:setgid(gid_t)       aarch64,mips,x86_64
 int     setuid:setuid32(uid_t)    arm,x86
-int     setuid:setuid(uid_t)      mips,x86_64
+int     setuid:setuid(uid_t)      aarch64,mips,x86_64
 int     setreuid:setreuid32(uid_t, uid_t)   arm,x86
-int     setreuid:setreuid(uid_t, uid_t)     mips,x86_64
+int     setreuid:setreuid(uid_t, uid_t)     aarch64,mips,x86_64
 int     setresuid:setresuid32(uid_t, uid_t, uid_t)   arm,x86
-int     setresuid:setresuid(uid_t, uid_t, uid_t)     mips,x86_64
+int     setresuid:setresuid(uid_t, uid_t, uid_t)     aarch64,mips,x86_64
 int     setresgid:setresgid32(gid_t, gid_t, gid_t)   arm,x86
-int     setresgid:setresgid(gid_t, gid_t, gid_t)     mips,x86_64
+int     setresgid:setresgid(gid_t, gid_t, gid_t)     aarch64,mips,x86_64
 void*   __brk:brk(void*)           all
 # See comments in kill.S to understand why we don't generate ARM stubs for kill/tkill/tgkill.
-int     kill(pid_t, int)           mips,x86,x86_64
-int     tkill(pid_t tid, int sig)  mips,x86,x86_64
-int     tgkill(pid_t tgid, pid_t tid, int sig)  mips,x86,x86_64
+int     kill(pid_t, int)           aarch64,mips,x86,x86_64
+int     tkill(pid_t tid, int sig)  aarch64,mips,x86,x86_64
+int     tgkill(pid_t tgid, pid_t tid, int sig)  aarch64,mips,x86,x86_64
 int     __ptrace:ptrace(int request, int pid, void* addr, void* data)  all
 int     __set_thread_area:set_thread_area(void*  user_desc)  mips,x86
 int     __getpriority:getpriority(int, int)  all
 int     setpriority(int, int, int)   all
 int     setrlimit(int resource, const struct rlimit* rlp)  all
 int     getrlimit:ugetrlimit(int resource, struct rlimit* rlp)  arm,x86
-int     getrlimit:getrlimit(int resource, struct rlimit* rlp)  mips,x86_64
+int     getrlimit:getrlimit(int resource, struct rlimit* rlp)  aarch64,mips,x86_64
 int     getrusage(int who, struct rusage*  r_usage)  all
 int     setgroups:setgroups32(int, const gid_t*)   arm,x86
-int     setgroups:setgroups(int, const gid_t*)     mips,x86_64
+int     setgroups:setgroups(int, const gid_t*)     aarch64,mips,x86_64
 int     setpgid(pid_t, pid_t)  all
 pid_t   vfork(void)  arm
 int     setregid:setregid32(gid_t, gid_t)  arm,x86
-int     setregid:setregid(gid_t, gid_t)    mips,x86_64
+int     setregid:setregid(gid_t, gid_t)    aarch64,mips,x86_64
 int     chroot(const char*)  all
 # IMPORTANT: Even though <sys/prctl.h> declares prctl(int, ...), the syscall stub must take 6 arguments
 #            to match the kernel implementation.
@@ -92,8 +92,8 @@ ssize_t     pread64(int, void*, size_t, off64_t) all
 ssize_t     pwrite64(int, void*, size_t, off64_t) all
 int         close(int)                      all
 pid_t       getpid()    all
-void*       mmap(void*, size_t, int, int, int, long)  x86_64
-void*       __mmap2:mmap2(void*, size_t, int, int, int, long)   arm,x86,mips
+void*       mmap(void*, size_t, int, int, int, long)  aarch64,x86_64
+void*       __mmap2:mmap2(void*, size_t, int, int, int, long)   arm,mips,x86
 int         munmap(void*, size_t)  all
 void*       mremap(void*, size_t, size_t, unsigned long)  all
 int         msync(const void*, size_t, int)    all
@@ -107,8 +107,8 @@ int         mincore(void*  start, size_t  length, unsigned char*  vec)   all
 int         __ioctl:ioctl(int, int, void*)  all
 int         readv(int, const struct iovec*, int)   all
 int         writev(int, const struct iovec*, int)  all
-int         __fcntl:fcntl(int, int, void*)  arm,x86,mips
-int         fcntl(int, void*)  x86_64
+int         __fcntl:fcntl(int, int, void*)  arm,mips,x86
+int         fcntl(int, void*)  aarch64,x86_64
 int         flock(int, int)   all
 int         fchmod(int, mode_t)  all
 int         dup(int)  all
@@ -118,11 +118,11 @@ int         getdents:getdents64(unsigned int, struct dirent*, unsigned int)   al
 int         fsync(int)  all
 int         fdatasync(int) all
 int         fchown:fchown32(int, uid_t, gid_t)  arm,x86
-int         fchown:fchown(int, uid_t, gid_t)    mips,x86_64
+int         fchown:fchown(int, uid_t, gid_t)    aarch64,mips,x86_64
 void        sync(void)  all
-int         __fcntl64:fcntl64(int, int, void*)  arm,x86,mips
-int         __fstatfs64:fstatfs64(int, size_t, struct statfs*)  arm,x86,mips
-int         fstatfs(int, struct statfs*)  x86_64
+int         __fcntl64:fcntl64(int, int, void*)  arm,mips,x86
+int         __fstatfs64:fstatfs64(int, size_t, struct statfs*)  arm,mips,x86
+int         fstatfs(int, struct statfs*)  aarch64,x86_64
 int         fsetxattr(int, const char*, const void*, size_t, int) all
 ssize_t     fgetxattr(int, const char*, void*, size_t) all
 ssize_t     flistxattr(int, char*, size_t) all
@@ -132,8 +132,8 @@ int __openat:openat(int, const char*, int, mode_t) all
 int faccessat(int, const char*, int, int)  all
 int fchmodat(int, const char*, mode_t, int)  all
 int fchownat(int, const char*, uid_t, gid_t, int)  all
-int fstatat:fstatat64(int, const char*, struct stat*, int)   arm,x86,mips
-int fstatat:newfstatat(int, const char*, struct stat*, int)  x86_64
+int fstatat:fstatat64(int, const char*, struct stat*, int)   arm,mips,x86
+int fstatat:newfstatat(int, const char*, struct stat*, int)  aarch64,x86_64
 int linkat(int, const char*, int, const char*, int)  all
 int mkdirat(int, const char*, mode_t)  all
 int mknodat(int, const char*, mode_t, dev_t)  all
@@ -149,23 +149,23 @@ int utimensat(int, const char*, const struct timespec times[2], int)  all
 # That means that every system call in this section should take three lines.
 off_t lseek(int, off_t, int) arm,mips,x86
 int __llseek:_llseek(int, unsigned long, unsigned long, off64_t*, int) arm,mips,x86
-off_t lseek|lseek64(int, off_t, int) x86_64
+off_t lseek|lseek64(int, off_t, int) aarch64,x86_64
 int ftruncate(int, off_t) arm,mips,x86
 int ftruncate64(int, off64_t) arm,mips,x86
-int ftruncate|ftruncate64(int, off_t) x86_64
+int ftruncate|ftruncate64(int, off_t) aarch64,x86_64
 ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count) arm,mips,x86
 ssize_t sendfile64(int out_fd, int in_fd, off64_t* offset, size_t count) arm,mips,x86
-ssize_t sendfile|sendfile64(int out_fd, int in_fd, off_t* offset, size_t count) x86_64
+ssize_t sendfile|sendfile64(int out_fd, int in_fd, off_t* offset, size_t count) aarch64,x86_64
 int truncate(const char*, off_t) arm,mips,x86
 int truncate64(const char*, off64_t) arm,mips,x86
-int truncate|truncate64(const char*, off_t) x86_64
+int truncate|truncate64(const char*, off_t) aarch64,x86_64
 
 # file system
 int     chdir(const char*)              all
 int     mount(const char*, const char*, const char*, unsigned long, const void*)  all
 int     umount2(const char*, int)  all
-int     fstat:fstat64(int, struct stat*)    arm,x86,mips
-int     fstat(int, struct stat*)    x86_64
+int     fstat:fstat64(int, struct stat*)    arm,mips,x86
+int     fstat(int, struct stat*)    aarch64,x86_64
 int     __getcwd:getcwd(char* buf, size_t size)  all
 int     fchdir(int)    all
 int     setxattr(const char*, const char*, const void*, size_t, int) all
@@ -176,8 +176,8 @@ ssize_t listxattr(const char*, char*, size_t) all
 ssize_t llistxattr(const char*, char*, size_t) all
 int     removexattr(const char*, const char*) all
 int     lremovexattr(const char*, const char*) all
-int     __statfs64:statfs64(const char*, size_t, struct statfs*)  arm,x86,mips
-int     statfs(const char*, struct statfs*)  x86_64
+int     __statfs64:statfs64(const char*, size_t, struct statfs*)  arm,mips,x86
+int     statfs(const char*, struct statfs*)  aarch64,x86_64
 long    unshare(unsigned long)  all
 int     swapon(const char*, int) all
 int     swapoff(const char*) all
@@ -212,21 +212,21 @@ int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t*, struct siginfo_t*, st
 int     signalfd4(int, const sigset_t*, size_t, int)  all
 
 # sockets
-int           socket(int, int, int)              arm,mips,x86_64
-int           socketpair(int, int, int, int*)    arm,mips,x86_64
-int           bind(int, struct sockaddr*, int)  arm,mips,x86_64
-int           connect(int, struct sockaddr*, socklen_t)   arm,mips,x86_64
-int           listen(int, int)                   arm,mips,x86_64
-int           accept(int, struct sockaddr*, socklen_t*)  arm,mips,x86_64
-int           getsockname(int, struct sockaddr*, socklen_t*)  arm,mips,x86_64
-int           getpeername(int, struct sockaddr*, socklen_t*)  arm,mips,x86_64
-int           sendto(int, const void*, size_t, int, const struct sockaddr*, socklen_t)  arm,mips,x86_64
-int           recvfrom(int, void*, size_t, unsigned int, struct sockaddr*, socklen_t*)  arm,mips,x86_64
-int           shutdown(int, int)  arm,mips,x86_64
-int           setsockopt(int, int, int, const void*, socklen_t)  arm,mips,x86_64
-int           getsockopt(int, int, int, void*, socklen_t*)    arm,mips,x86_64
-int           sendmsg(int, const struct msghdr*, unsigned int)  arm,mips,x86_64
-int           recvmsg(int, struct msghdr*, unsigned int)   arm,mips,x86_64
+int           socket(int, int, int)              aarch64,arm,mips,x86_64
+int           socketpair(int, int, int, int*)    aarch64,arm,mips,x86_64
+int           bind(int, struct sockaddr*, int)  aarch64,arm,mips,x86_64
+int           connect(int, struct sockaddr*, socklen_t)   aarch64,arm,mips,x86_64
+int           listen(int, int)                   aarch64,arm,mips,x86_64
+int           accept(int, struct sockaddr*, socklen_t*)  aarch64,arm,mips,x86_64
+int           getsockname(int, struct sockaddr*, socklen_t*)  aarch64,arm,mips,x86_64
+int           getpeername(int, struct sockaddr*, socklen_t*)  aarch64,arm,mips,x86_64
+int           sendto(int, const void*, size_t, int, const struct sockaddr*, socklen_t)  aarch64,arm,mips,x86_64
+int           recvfrom(int, void*, size_t, unsigned int, struct sockaddr*, socklen_t*)  aarch64,arm,mips,x86_64
+int           shutdown(int, int)  aarch64,arm,mips,x86_64
+int           setsockopt(int, int, int, const void*, socklen_t)  aarch64,arm,mips,x86_64
+int           getsockopt(int, int, int, void*, socklen_t*)    aarch64,arm,mips,x86_64
+int           sendmsg(int, const struct msghdr*, unsigned int)  aarch64,arm,mips,x86_64
+int           recvmsg(int, struct msghdr*, unsigned int)   aarch64,arm,mips,x86_64
 
 # sockets for x86. These are done as an "indexed" call to socketcall syscall.
 int           socket:socketcall:1(int, int, int) x86

diff --git a/libc/tools/bionic_utils.py b/libc/tools/bionic_utils.py
index f8d8897..39dc76a 100644 (file)
--- a/libc/tools/bionic_utils.py
+++ b/libc/tools/bionic_utils.py
@@ -2,7 +2,7 @@
 
 import sys, os, commands, string
 
-all_arches = [ "arm", "mips", "x86", "x86_64" ]
+all_arches = [ "aarch64", "arm", "mips", "x86", "x86_64" ]
 
 # basic debugging trace support
 # call D_setlevel to set the verbosity level

diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index 5595cd7..bf44b70 100755 (executable)
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -56,6 +56,29 @@ function_alias = """
 
 
 #
+# AArch64 assembler templates for each syscall stub
+#
+
+aarch64_call = syscall_stub_header + """\
+    stp     x29, x30, [sp, #-16]!
+    mov     x29,  sp
+    str     x8,       [sp, #-16]!
+
+    mov     x8, %(__NR_name)s
+    svc     #0
+
+    ldr     x8,       [sp], #16
+    ldp     x29, x30, [sp], #16
+
+    cmn     x0, #(MAX_ERRNO + 1)
+    cneg    x0, x0, hi
+    b.hi    __set_errno
+
+    ret
+END(%(func)s)
+"""
+
+#
 # ARM assembler templates for each syscall stub
 #
 
@@ -246,6 +269,10 @@ def add_footer(pointer_length, stub, syscall):
     return stub
 
 
+def aarch64_genstub(syscall):
+    return aarch64_call % syscall
+
+
 def arm_eabi_genstub(syscall):
     num_regs = count_arm_param_registers(syscall["params"])
     if num_regs > 4:
@@ -277,6 +304,7 @@ def x86_genstub(syscall):
     result += x86_return % syscall
     return result
 
+
 def x86_genstub_socketcall(syscall):
     #   %ebx <--- Argument 1 - The call id of the needed vectored
     #                          syscall (socket, bind, recv, etc)
@@ -339,6 +367,9 @@ class State:
         for syscall in self.syscalls:
             syscall["__NR_name"] = make__NR_name(syscall["name"])
 
+            if syscall.has_key("aarch64"):
+                syscall["asm-aarch64"] = add_footer(64, aarch64_genstub(syscall), syscall)
+
             if syscall.has_key("arm"):
                 syscall["asm-arm"] = add_footer(32, arm_eabi_genstub(syscall), syscall)
 
@@ -357,7 +388,6 @@ class State:
             if syscall.has_key("x86_64"):
                 syscall["asm-x86_64"] = add_footer(64, x86_64_genstub(syscall), syscall)
 
-
     # Scan a Linux kernel asm/unistd.h file containing __NR_* constants
     # and write out equivalent SYS_* constants for glibc source compatibility.
     def scan_linux_unistd_h(self, fp, path):
@@ -380,7 +410,9 @@ class State:
         glibc_fp.write("#ifndef _BIONIC_GLIBC_SYSCALLS_H_\n")
         glibc_fp.write("#define _BIONIC_GLIBC_SYSCALLS_H_\n")
 
-        glibc_fp.write("#if defined(__arm__)\n")
+        glibc_fp.write("#if defined(__aarch64__)\n")
+        self.scan_linux_unistd_h(glibc_fp, bionic_libc_root + "/kernel/uapi/asm-generic/unistd.h")
+        glibc_fp.write("#elif defined(__arm__)\n")
         self.scan_linux_unistd_h(glibc_fp, bionic_libc_root + "/kernel/arch-arm/asm/unistd.h")
         glibc_fp.write("#elif defined(__mips__)\n")
         self.scan_linux_unistd_h(glibc_fp, bionic_libc_root + "/kernel/arch-mips/asm/unistd.h")