Move away from the __ARCH_WANT_SYSCALL_NO_AT system calls.

Modern architectures only get the *at(2) system calls. For example,
aarch64 doesn't have open(2), and expects userspace to use openat(2)
instead.

Change-Id: I87b4ed79790cb8a80844f5544ac1a13fda26c7b5
diff --git a/libc/arch-arm/syscalls.mk b/libc/arch-arm/syscalls.mk
index f9d348b..a59d064 100644
--- a/libc/arch-arm/syscalls.mk
+++ b/libc/arch-arm/syscalls.mk
@@ -35,15 +35,12 @@
 syscall_src += arch-arm/syscalls/_exit.S
 syscall_src += arch-arm/syscalls/_exit_thread.S
 syscall_src += arch-arm/syscalls/accept.S
-syscall_src += arch-arm/syscalls/access.S
 syscall_src += arch-arm/syscalls/acct.S
 syscall_src += arch-arm/syscalls/bind.S
 syscall_src += arch-arm/syscalls/cacheflush.S
 syscall_src += arch-arm/syscalls/capget.S
 syscall_src += arch-arm/syscalls/capset.S
 syscall_src += arch-arm/syscalls/chdir.S
-syscall_src += arch-arm/syscalls/chmod.S
-syscall_src += arch-arm/syscalls/chown.S
 syscall_src += arch-arm/syscalls/chroot.S
 syscall_src += arch-arm/syscalls/clock_getres.S
 syscall_src += arch-arm/syscalls/clock_gettime.S
@@ -105,21 +102,18 @@
 syscall_src += arch-arm/syscalls/ioprio_get.S
 syscall_src += arch-arm/syscalls/ioprio_set.S
 syscall_src += arch-arm/syscalls/klogctl.S
-syscall_src += arch-arm/syscalls/lchown.S
 syscall_src += arch-arm/syscalls/lgetxattr.S
-syscall_src += arch-arm/syscalls/link.S
+syscall_src += arch-arm/syscalls/linkat.S
 syscall_src += arch-arm/syscalls/listen.S
 syscall_src += arch-arm/syscalls/listxattr.S
 syscall_src += arch-arm/syscalls/llistxattr.S
 syscall_src += arch-arm/syscalls/lremovexattr.S
 syscall_src += arch-arm/syscalls/lseek.S
 syscall_src += arch-arm/syscalls/lsetxattr.S
-syscall_src += arch-arm/syscalls/lstat.S
 syscall_src += arch-arm/syscalls/madvise.S
 syscall_src += arch-arm/syscalls/mincore.S
-syscall_src += arch-arm/syscalls/mkdir.S
 syscall_src += arch-arm/syscalls/mkdirat.S
-syscall_src += arch-arm/syscalls/mknod.S
+syscall_src += arch-arm/syscalls/mknodat.S
 syscall_src += arch-arm/syscalls/mlock.S
 syscall_src += arch-arm/syscalls/mlockall.S
 syscall_src += arch-arm/syscalls/mount.S
@@ -141,14 +135,12 @@
 syscall_src += arch-arm/syscalls/pwrite64.S
 syscall_src += arch-arm/syscalls/read.S
 syscall_src += arch-arm/syscalls/readahead.S
-syscall_src += arch-arm/syscalls/readlink.S
+syscall_src += arch-arm/syscalls/readlinkat.S
 syscall_src += arch-arm/syscalls/readv.S
 syscall_src += arch-arm/syscalls/recvfrom.S
 syscall_src += arch-arm/syscalls/recvmsg.S
 syscall_src += arch-arm/syscalls/removexattr.S
-syscall_src += arch-arm/syscalls/rename.S
 syscall_src += arch-arm/syscalls/renameat.S
-syscall_src += arch-arm/syscalls/rmdir.S
 syscall_src += arch-arm/syscalls/sched_get_priority_max.S
 syscall_src += arch-arm/syscalls/sched_get_priority_min.S
 syscall_src += arch-arm/syscalls/sched_getparam.S
@@ -183,10 +175,9 @@
 syscall_src += arch-arm/syscalls/signalfd4.S
 syscall_src += arch-arm/syscalls/socket.S
 syscall_src += arch-arm/syscalls/socketpair.S
-syscall_src += arch-arm/syscalls/stat.S
 syscall_src += arch-arm/syscalls/swapoff.S
 syscall_src += arch-arm/syscalls/swapon.S
-syscall_src += arch-arm/syscalls/symlink.S
+syscall_src += arch-arm/syscalls/symlinkat.S
 syscall_src += arch-arm/syscalls/sync.S
 syscall_src += arch-arm/syscalls/sysinfo.S
 syscall_src += arch-arm/syscalls/timerfd_create.S
@@ -198,11 +189,9 @@
 syscall_src += arch-arm/syscalls/umask.S
 syscall_src += arch-arm/syscalls/umount2.S
 syscall_src += arch-arm/syscalls/uname.S
-syscall_src += arch-arm/syscalls/unlink.S
 syscall_src += arch-arm/syscalls/unlinkat.S
 syscall_src += arch-arm/syscalls/unshare.S
 syscall_src += arch-arm/syscalls/utimensat.S
-syscall_src += arch-arm/syscalls/utimes.S
 syscall_src += arch-arm/syscalls/vfork.S
 syscall_src += arch-arm/syscalls/wait4.S
 syscall_src += arch-arm/syscalls/write.S
diff --git a/libc/arch-arm/syscalls/access.S b/libc/arch-arm/syscalls/access.S
deleted file mode 100644
index 730be2a..0000000
--- a/libc/arch-arm/syscalls/access.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(access)
-    mov     ip, r7
-    ldr     r7, =__NR_access
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(access)
diff --git a/libc/arch-arm/syscalls/chmod.S b/libc/arch-arm/syscalls/chmod.S
deleted file mode 100644
index 3491ff2..0000000
--- a/libc/arch-arm/syscalls/chmod.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(chmod)
-    mov     ip, r7
-    ldr     r7, =__NR_chmod
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(chmod)
diff --git a/libc/arch-arm/syscalls/chown.S b/libc/arch-arm/syscalls/chown.S
deleted file mode 100644
index 1ef51b4..0000000
--- a/libc/arch-arm/syscalls/chown.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(chown)
-    mov     ip, r7
-    ldr     r7, =__NR_chown32
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(chown)
diff --git a/libc/arch-arm/syscalls/lchown.S b/libc/arch-arm/syscalls/lchown.S
deleted file mode 100644
index 91b7cf5..0000000
--- a/libc/arch-arm/syscalls/lchown.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(lchown)
-    mov     ip, r7
-    ldr     r7, =__NR_lchown32
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(lchown)
diff --git a/libc/arch-arm/syscalls/link.S b/libc/arch-arm/syscalls/link.S
deleted file mode 100644
index cc6314e..0000000
--- a/libc/arch-arm/syscalls/link.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(link)
-    mov     ip, r7
-    ldr     r7, =__NR_link
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(link)
diff --git a/libc/arch-arm/syscalls/linkat.S b/libc/arch-arm/syscalls/linkat.S
new file mode 100644
index 0000000..e990ce1
--- /dev/null
+++ b/libc/arch-arm/syscalls/linkat.S
@@ -0,0 +1,19 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <asm/unistd.h>
+#include <linux/err.h>
+#include <machine/asm.h>
+
+ENTRY(linkat)
+    mov     ip, sp
+    .save   {r4, r5, r6, r7}
+    stmfd   sp!, {r4, r5, r6, r7}
+    ldmfd   ip, {r4, r5, r6}
+    ldr     r7, =__NR_linkat
+    swi     #0
+    ldmfd   sp!, {r4, r5, r6, r7}
+    cmn     r0, #(MAX_ERRNO + 1)
+    bxls    lr
+    neg     r0, r0
+    b       __set_errno
+END(linkat)
diff --git a/libc/arch-arm/syscalls/lstat.S b/libc/arch-arm/syscalls/lstat.S
deleted file mode 100644
index 4e3d3f9..0000000
--- a/libc/arch-arm/syscalls/lstat.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(lstat)
-    mov     ip, r7
-    ldr     r7, =__NR_lstat64
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(lstat)
diff --git a/libc/arch-arm/syscalls/mkdir.S b/libc/arch-arm/syscalls/mkdir.S
deleted file mode 100644
index efceeaa..0000000
--- a/libc/arch-arm/syscalls/mkdir.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(mkdir)
-    mov     ip, r7
-    ldr     r7, =__NR_mkdir
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(mkdir)
diff --git a/libc/arch-arm/syscalls/mknod.S b/libc/arch-arm/syscalls/mknod.S
deleted file mode 100644
index a8aeb39..0000000
--- a/libc/arch-arm/syscalls/mknod.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(mknod)
-    mov     ip, r7
-    ldr     r7, =__NR_mknod
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(mknod)
diff --git a/libc/arch-arm/syscalls/utimes.S b/libc/arch-arm/syscalls/mknodat.S
similarity index 81%
rename from libc/arch-arm/syscalls/utimes.S
rename to libc/arch-arm/syscalls/mknodat.S
index 8b70479..4a64eea 100644
--- a/libc/arch-arm/syscalls/utimes.S
+++ b/libc/arch-arm/syscalls/mknodat.S
@@ -4,13 +4,13 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(utimes)
+ENTRY(mknodat)
     mov     ip, r7
-    ldr     r7, =__NR_utimes
+    ldr     r7, =__NR_mknodat
     swi     #0
     mov     r7, ip
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
     b       __set_errno
-END(utimes)
+END(mknodat)
diff --git a/libc/arch-arm/syscalls/readlink.S b/libc/arch-arm/syscalls/readlink.S
deleted file mode 100644
index 41fd457..0000000
--- a/libc/arch-arm/syscalls/readlink.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(readlink)
-    mov     ip, r7
-    ldr     r7, =__NR_readlink
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(readlink)
diff --git a/libc/arch-arm/syscalls/utimes.S b/libc/arch-arm/syscalls/readlinkat.S
similarity index 79%
copy from libc/arch-arm/syscalls/utimes.S
copy to libc/arch-arm/syscalls/readlinkat.S
index 8b70479..3d85e56 100644
--- a/libc/arch-arm/syscalls/utimes.S
+++ b/libc/arch-arm/syscalls/readlinkat.S
@@ -4,13 +4,13 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(utimes)
+ENTRY(readlinkat)
     mov     ip, r7
-    ldr     r7, =__NR_utimes
+    ldr     r7, =__NR_readlinkat
     swi     #0
     mov     r7, ip
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
     b       __set_errno
-END(utimes)
+END(readlinkat)
diff --git a/libc/arch-arm/syscalls/rename.S b/libc/arch-arm/syscalls/rename.S
deleted file mode 100644
index 0954c51..0000000
--- a/libc/arch-arm/syscalls/rename.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(rename)
-    mov     ip, r7
-    ldr     r7, =__NR_rename
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(rename)
diff --git a/libc/arch-arm/syscalls/rmdir.S b/libc/arch-arm/syscalls/rmdir.S
deleted file mode 100644
index 3ebe9d1..0000000
--- a/libc/arch-arm/syscalls/rmdir.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(rmdir)
-    mov     ip, r7
-    ldr     r7, =__NR_rmdir
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(rmdir)
diff --git a/libc/arch-arm/syscalls/stat.S b/libc/arch-arm/syscalls/stat.S
deleted file mode 100644
index 728c170..0000000
--- a/libc/arch-arm/syscalls/stat.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(stat)
-    mov     ip, r7
-    ldr     r7, =__NR_stat64
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(stat)
diff --git a/libc/arch-arm/syscalls/symlink.S b/libc/arch-arm/syscalls/symlink.S
deleted file mode 100644
index 92bd669..0000000
--- a/libc/arch-arm/syscalls/symlink.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(symlink)
-    mov     ip, r7
-    ldr     r7, =__NR_symlink
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(symlink)
diff --git a/libc/arch-arm/syscalls/utimes.S b/libc/arch-arm/syscalls/symlinkat.S
similarity index 80%
copy from libc/arch-arm/syscalls/utimes.S
copy to libc/arch-arm/syscalls/symlinkat.S
index 8b70479..fb51f19 100644
--- a/libc/arch-arm/syscalls/utimes.S
+++ b/libc/arch-arm/syscalls/symlinkat.S
@@ -4,13 +4,13 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(utimes)
+ENTRY(symlinkat)
     mov     ip, r7
-    ldr     r7, =__NR_utimes
+    ldr     r7, =__NR_symlinkat
     swi     #0
     mov     r7, ip
     cmn     r0, #(MAX_ERRNO + 1)
     bxls    lr
     neg     r0, r0
     b       __set_errno
-END(utimes)
+END(symlinkat)
diff --git a/libc/arch-arm/syscalls/unlink.S b/libc/arch-arm/syscalls/unlink.S
deleted file mode 100644
index 80c4c77..0000000
--- a/libc/arch-arm/syscalls/unlink.S
+++ /dev/null
@@ -1,16 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(unlink)
-    mov     ip, r7
-    ldr     r7, =__NR_unlink
-    swi     #0
-    mov     r7, ip
-    cmn     r0, #(MAX_ERRNO + 1)
-    bxls    lr
-    neg     r0, r0
-    b       __set_errno
-END(unlink)