diff --git a/libc/arch-arm/syscalls/__accept4.S b/libc/arch-arm/syscalls/__accept4.S
index 9a6874b..2b1eb28 100644
--- a/libc/arch-arm/syscalls/__accept4.S
+++ b/libc/arch-arm/syscalls/__accept4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__accept4)
     mov     ip, r7
     ldr     r7, =__NR_accept4
diff --git a/libc/arch-arm/syscalls/__brk.S b/libc/arch-arm/syscalls/__brk.S
index 31de0d2..0987f0e 100644
--- a/libc/arch-arm/syscalls/__brk.S
+++ b/libc/arch-arm/syscalls/__brk.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__brk)
     mov     ip, r7
     ldr     r7, =__NR_brk
diff --git a/libc/arch-arm/syscalls/__connect.S b/libc/arch-arm/syscalls/__connect.S
index 8cb026c..510af95 100644
--- a/libc/arch-arm/syscalls/__connect.S
+++ b/libc/arch-arm/syscalls/__connect.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__connect)
     mov     ip, r7
     ldr     r7, =__NR_connect
diff --git a/libc/arch-arm/syscalls/__epoll_pwait.S b/libc/arch-arm/syscalls/__epoll_pwait.S
index b2d8d48..bbba2e1 100644
--- a/libc/arch-arm/syscalls/__epoll_pwait.S
+++ b/libc/arch-arm/syscalls/__epoll_pwait.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__epoll_pwait)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/__exit.S b/libc/arch-arm/syscalls/__exit.S
index c534bb0..ceef94e 100644
--- a/libc/arch-arm/syscalls/__exit.S
+++ b/libc/arch-arm/syscalls/__exit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__exit)
     mov     ip, r7
     ldr     r7, =__NR_exit
diff --git a/libc/arch-arm/syscalls/__fcntl64.S b/libc/arch-arm/syscalls/__fcntl64.S
index 2132cb7..bb2068d 100644
--- a/libc/arch-arm/syscalls/__fcntl64.S
+++ b/libc/arch-arm/syscalls/__fcntl64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__fcntl64)
     mov     ip, r7
     ldr     r7, =__NR_fcntl64
diff --git a/libc/arch-arm/syscalls/__fstatfs64.S b/libc/arch-arm/syscalls/__fstatfs64.S
index 18942bc..b493aa0 100644
--- a/libc/arch-arm/syscalls/__fstatfs64.S
+++ b/libc/arch-arm/syscalls/__fstatfs64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__fstatfs64)
     mov     ip, r7
     ldr     r7, =__NR_fstatfs64
diff --git a/libc/arch-arm/syscalls/__getcpu.S b/libc/arch-arm/syscalls/__getcpu.S
index 1aea50a..1b3fc46 100644
--- a/libc/arch-arm/syscalls/__getcpu.S
+++ b/libc/arch-arm/syscalls/__getcpu.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getcpu)
     mov     ip, r7
     ldr     r7, =__NR_getcpu
diff --git a/libc/arch-arm/syscalls/__getcwd.S b/libc/arch-arm/syscalls/__getcwd.S
index 1c2ac6c..d91b3ca 100644
--- a/libc/arch-arm/syscalls/__getcwd.S
+++ b/libc/arch-arm/syscalls/__getcwd.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getcwd)
     mov     ip, r7
     ldr     r7, =__NR_getcwd
diff --git a/libc/arch-arm/syscalls/__getdents64.S b/libc/arch-arm/syscalls/__getdents64.S
index c3d5e5b..7d3d81c 100644
--- a/libc/arch-arm/syscalls/__getdents64.S
+++ b/libc/arch-arm/syscalls/__getdents64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getdents64)
     mov     ip, r7
     ldr     r7, =__NR_getdents64
diff --git a/libc/arch-arm/syscalls/__getpid.S b/libc/arch-arm/syscalls/__getpid.S
index eedc33a..ede0865 100644
--- a/libc/arch-arm/syscalls/__getpid.S
+++ b/libc/arch-arm/syscalls/__getpid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getpid)
     mov     ip, r7
     ldr     r7, =__NR_getpid
diff --git a/libc/arch-arm/syscalls/__getpriority.S b/libc/arch-arm/syscalls/__getpriority.S
index 90ccaea..d3a6468 100644
--- a/libc/arch-arm/syscalls/__getpriority.S
+++ b/libc/arch-arm/syscalls/__getpriority.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getpriority)
     mov     ip, r7
     ldr     r7, =__NR_getpriority
diff --git a/libc/arch-arm/syscalls/__ioctl.S b/libc/arch-arm/syscalls/__ioctl.S
index 3f816db..b3ac82f 100644
--- a/libc/arch-arm/syscalls/__ioctl.S
+++ b/libc/arch-arm/syscalls/__ioctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ioctl)
     mov     ip, r7
     ldr     r7, =__NR_ioctl
diff --git a/libc/arch-arm/syscalls/__llseek.S b/libc/arch-arm/syscalls/__llseek.S
index ec307d2..b36164c 100644
--- a/libc/arch-arm/syscalls/__llseek.S
+++ b/libc/arch-arm/syscalls/__llseek.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__llseek)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/__mmap2.S b/libc/arch-arm/syscalls/__mmap2.S
index 8a17997..ba74716 100644
--- a/libc/arch-arm/syscalls/__mmap2.S
+++ b/libc/arch-arm/syscalls/__mmap2.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__mmap2)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/__openat.S b/libc/arch-arm/syscalls/__openat.S
index 7a38dc3..6b119e1 100644
--- a/libc/arch-arm/syscalls/__openat.S
+++ b/libc/arch-arm/syscalls/__openat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__openat)
     mov     ip, r7
     ldr     r7, =__NR_openat
diff --git a/libc/arch-arm/syscalls/__ppoll.S b/libc/arch-arm/syscalls/__ppoll.S
index d9fb3d9..3a0e80c 100644
--- a/libc/arch-arm/syscalls/__ppoll.S
+++ b/libc/arch-arm/syscalls/__ppoll.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ppoll)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/__pselect6.S b/libc/arch-arm/syscalls/__pselect6.S
index 05fea54..1417be8 100644
--- a/libc/arch-arm/syscalls/__pselect6.S
+++ b/libc/arch-arm/syscalls/__pselect6.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__pselect6)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/__ptrace.S b/libc/arch-arm/syscalls/__ptrace.S
index 4e41d9d..bc03232 100644
--- a/libc/arch-arm/syscalls/__ptrace.S
+++ b/libc/arch-arm/syscalls/__ptrace.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ptrace)
     mov     ip, r7
     ldr     r7, =__NR_ptrace
diff --git a/libc/arch-arm/syscalls/__reboot.S b/libc/arch-arm/syscalls/__reboot.S
index 18e29a7..91bbf7c 100644
--- a/libc/arch-arm/syscalls/__reboot.S
+++ b/libc/arch-arm/syscalls/__reboot.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__reboot)
     mov     ip, r7
     ldr     r7, =__NR_reboot
diff --git a/libc/arch-arm/syscalls/__rt_sigaction.S b/libc/arch-arm/syscalls/__rt_sigaction.S
index 974c0e2..6a5e058 100644
--- a/libc/arch-arm/syscalls/__rt_sigaction.S
+++ b/libc/arch-arm/syscalls/__rt_sigaction.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigaction)
     mov     ip, r7
     ldr     r7, =__NR_rt_sigaction
diff --git a/libc/arch-arm/syscalls/__rt_sigpending.S b/libc/arch-arm/syscalls/__rt_sigpending.S
index 4a0f5d7..44da9b2 100644
--- a/libc/arch-arm/syscalls/__rt_sigpending.S
+++ b/libc/arch-arm/syscalls/__rt_sigpending.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigpending)
     mov     ip, r7
     ldr     r7, =__NR_rt_sigpending
diff --git a/libc/arch-arm/syscalls/__rt_sigprocmask.S b/libc/arch-arm/syscalls/__rt_sigprocmask.S
index 19abdc1..81cdb85 100644
--- a/libc/arch-arm/syscalls/__rt_sigprocmask.S
+++ b/libc/arch-arm/syscalls/__rt_sigprocmask.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigprocmask)
     mov     ip, r7
     ldr     r7, =__NR_rt_sigprocmask
diff --git a/libc/arch-arm/syscalls/__rt_sigsuspend.S b/libc/arch-arm/syscalls/__rt_sigsuspend.S
index a0af905..a9a3903 100644
--- a/libc/arch-arm/syscalls/__rt_sigsuspend.S
+++ b/libc/arch-arm/syscalls/__rt_sigsuspend.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigsuspend)
     mov     ip, r7
     ldr     r7, =__NR_rt_sigsuspend
diff --git a/libc/arch-arm/syscalls/__rt_sigtimedwait.S b/libc/arch-arm/syscalls/__rt_sigtimedwait.S
index 0ba7ce2..7b78a43 100644
--- a/libc/arch-arm/syscalls/__rt_sigtimedwait.S
+++ b/libc/arch-arm/syscalls/__rt_sigtimedwait.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigtimedwait)
     mov     ip, r7
     ldr     r7, =__NR_rt_sigtimedwait
diff --git a/libc/arch-arm/syscalls/__sched_getaffinity.S b/libc/arch-arm/syscalls/__sched_getaffinity.S
index e977cfb..a22c55e 100644
--- a/libc/arch-arm/syscalls/__sched_getaffinity.S
+++ b/libc/arch-arm/syscalls/__sched_getaffinity.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__sched_getaffinity)
     mov     ip, r7
     ldr     r7, =__NR_sched_getaffinity
diff --git a/libc/arch-arm/syscalls/__set_tid_address.S b/libc/arch-arm/syscalls/__set_tid_address.S
index b4b42e7..0838c8b 100644
--- a/libc/arch-arm/syscalls/__set_tid_address.S
+++ b/libc/arch-arm/syscalls/__set_tid_address.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__set_tid_address)
     mov     ip, r7
     ldr     r7, =__NR_set_tid_address
diff --git a/libc/arch-arm/syscalls/__set_tls.S b/libc/arch-arm/syscalls/__set_tls.S
index 94c7cf4..c4c2eb7 100644
--- a/libc/arch-arm/syscalls/__set_tls.S
+++ b/libc/arch-arm/syscalls/__set_tls.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__set_tls)
     mov     ip, r7
     ldr     r7, =__ARM_NR_set_tls
diff --git a/libc/arch-arm/syscalls/__sigaction.S b/libc/arch-arm/syscalls/__sigaction.S
index 7e2e07e..869b4c8 100644
--- a/libc/arch-arm/syscalls/__sigaction.S
+++ b/libc/arch-arm/syscalls/__sigaction.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__sigaction)
     mov     ip, r7
     ldr     r7, =__NR_sigaction
diff --git a/libc/arch-arm/syscalls/__signalfd4.S b/libc/arch-arm/syscalls/__signalfd4.S
index 712f975..3bcf031 100644
--- a/libc/arch-arm/syscalls/__signalfd4.S
+++ b/libc/arch-arm/syscalls/__signalfd4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__signalfd4)
     mov     ip, r7
     ldr     r7, =__NR_signalfd4
diff --git a/libc/arch-arm/syscalls/__socket.S b/libc/arch-arm/syscalls/__socket.S
index d63028b..a655b5b 100644
--- a/libc/arch-arm/syscalls/__socket.S
+++ b/libc/arch-arm/syscalls/__socket.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__socket)
     mov     ip, r7
     ldr     r7, =__NR_socket
diff --git a/libc/arch-arm/syscalls/__statfs64.S b/libc/arch-arm/syscalls/__statfs64.S
index 2563562..80ea6ce 100644
--- a/libc/arch-arm/syscalls/__statfs64.S
+++ b/libc/arch-arm/syscalls/__statfs64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__statfs64)
     mov     ip, r7
     ldr     r7, =__NR_statfs64
diff --git a/libc/arch-arm/syscalls/__timer_create.S b/libc/arch-arm/syscalls/__timer_create.S
index 9b75749..75fc347 100644
--- a/libc/arch-arm/syscalls/__timer_create.S
+++ b/libc/arch-arm/syscalls/__timer_create.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_create)
     mov     ip, r7
     ldr     r7, =__NR_timer_create
diff --git a/libc/arch-arm/syscalls/__timer_delete.S b/libc/arch-arm/syscalls/__timer_delete.S
index db32b3b..ad5ec36 100644
--- a/libc/arch-arm/syscalls/__timer_delete.S
+++ b/libc/arch-arm/syscalls/__timer_delete.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_delete)
     mov     ip, r7
     ldr     r7, =__NR_timer_delete
diff --git a/libc/arch-arm/syscalls/__timer_getoverrun.S b/libc/arch-arm/syscalls/__timer_getoverrun.S
index 5701b12..529712c 100644
--- a/libc/arch-arm/syscalls/__timer_getoverrun.S
+++ b/libc/arch-arm/syscalls/__timer_getoverrun.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_getoverrun)
     mov     ip, r7
     ldr     r7, =__NR_timer_getoverrun
diff --git a/libc/arch-arm/syscalls/__timer_gettime.S b/libc/arch-arm/syscalls/__timer_gettime.S
index e9a4ff9..180da39 100644
--- a/libc/arch-arm/syscalls/__timer_gettime.S
+++ b/libc/arch-arm/syscalls/__timer_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_gettime)
     mov     ip, r7
     ldr     r7, =__NR_timer_gettime
diff --git a/libc/arch-arm/syscalls/__timer_settime.S b/libc/arch-arm/syscalls/__timer_settime.S
index 2f1ab19..e2950dd 100644
--- a/libc/arch-arm/syscalls/__timer_settime.S
+++ b/libc/arch-arm/syscalls/__timer_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_settime)
     mov     ip, r7
     ldr     r7, =__NR_timer_settime
diff --git a/libc/arch-arm/syscalls/__waitid.S b/libc/arch-arm/syscalls/__waitid.S
index e5e1f54..8c6ba66 100644
--- a/libc/arch-arm/syscalls/__waitid.S
+++ b/libc/arch-arm/syscalls/__waitid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__waitid)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/_exit.S b/libc/arch-arm/syscalls/_exit.S
index 581b340..fd072c3 100644
--- a/libc/arch-arm/syscalls/_exit.S
+++ b/libc/arch-arm/syscalls/_exit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(_exit)
     mov     ip, r7
     ldr     r7, =__NR_exit_group
diff --git a/libc/arch-arm/syscalls/acct.S b/libc/arch-arm/syscalls/acct.S
index e360c5a..156db48 100644
--- a/libc/arch-arm/syscalls/acct.S
+++ b/libc/arch-arm/syscalls/acct.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(acct)
     mov     ip, r7
     ldr     r7, =__NR_acct
diff --git a/libc/arch-arm/syscalls/bind.S b/libc/arch-arm/syscalls/bind.S
index e07dd77..892c77f 100644
--- a/libc/arch-arm/syscalls/bind.S
+++ b/libc/arch-arm/syscalls/bind.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(bind)
     mov     ip, r7
     ldr     r7, =__NR_bind
diff --git a/libc/arch-arm/syscalls/cacheflush.S b/libc/arch-arm/syscalls/cacheflush.S
index ac2a218..0739c32 100644
--- a/libc/arch-arm/syscalls/cacheflush.S
+++ b/libc/arch-arm/syscalls/cacheflush.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(cacheflush)
     mov     ip, r7
     ldr     r7, =__ARM_NR_cacheflush
diff --git a/libc/arch-arm/syscalls/capget.S b/libc/arch-arm/syscalls/capget.S
index b912830..6fd0f7c 100644
--- a/libc/arch-arm/syscalls/capget.S
+++ b/libc/arch-arm/syscalls/capget.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(capget)
     mov     ip, r7
     ldr     r7, =__NR_capget
diff --git a/libc/arch-arm/syscalls/capset.S b/libc/arch-arm/syscalls/capset.S
index cef68c5..2708ff6 100644
--- a/libc/arch-arm/syscalls/capset.S
+++ b/libc/arch-arm/syscalls/capset.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(capset)
     mov     ip, r7
     ldr     r7, =__NR_capset
diff --git a/libc/arch-arm/syscalls/chdir.S b/libc/arch-arm/syscalls/chdir.S
index ea93fd6..0b86a0f 100644
--- a/libc/arch-arm/syscalls/chdir.S
+++ b/libc/arch-arm/syscalls/chdir.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(chdir)
     mov     ip, r7
     ldr     r7, =__NR_chdir
diff --git a/libc/arch-arm/syscalls/chroot.S b/libc/arch-arm/syscalls/chroot.S
index b1199e6..15aa392 100644
--- a/libc/arch-arm/syscalls/chroot.S
+++ b/libc/arch-arm/syscalls/chroot.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(chroot)
     mov     ip, r7
     ldr     r7, =__NR_chroot
diff --git a/libc/arch-arm/syscalls/clock_getres.S b/libc/arch-arm/syscalls/clock_getres.S
index f1e7fa2..b92289a 100644
--- a/libc/arch-arm/syscalls/clock_getres.S
+++ b/libc/arch-arm/syscalls/clock_getres.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_getres)
     mov     ip, r7
     ldr     r7, =__NR_clock_getres
diff --git a/libc/arch-arm/syscalls/clock_gettime.S b/libc/arch-arm/syscalls/clock_gettime.S
index 9b3e132..203db8f 100644
--- a/libc/arch-arm/syscalls/clock_gettime.S
+++ b/libc/arch-arm/syscalls/clock_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_gettime)
     mov     ip, r7
     ldr     r7, =__NR_clock_gettime
diff --git a/libc/arch-arm/syscalls/clock_nanosleep.S b/libc/arch-arm/syscalls/clock_nanosleep.S
index fda7394..5de2267 100644
--- a/libc/arch-arm/syscalls/clock_nanosleep.S
+++ b/libc/arch-arm/syscalls/clock_nanosleep.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_nanosleep)
     mov     ip, r7
     ldr     r7, =__NR_clock_nanosleep
diff --git a/libc/arch-arm/syscalls/clock_settime.S b/libc/arch-arm/syscalls/clock_settime.S
index 5a0059e..71e61f8 100644
--- a/libc/arch-arm/syscalls/clock_settime.S
+++ b/libc/arch-arm/syscalls/clock_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_settime)
     mov     ip, r7
     ldr     r7, =__NR_clock_settime
diff --git a/libc/arch-arm/syscalls/close.S b/libc/arch-arm/syscalls/close.S
index 00c8f85..3e0fd32 100644
--- a/libc/arch-arm/syscalls/close.S
+++ b/libc/arch-arm/syscalls/close.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(close)
     mov     ip, r7
     ldr     r7, =__NR_close
diff --git a/libc/arch-arm/syscalls/delete_module.S b/libc/arch-arm/syscalls/delete_module.S
index a26b478..0af2520 100644
--- a/libc/arch-arm/syscalls/delete_module.S
+++ b/libc/arch-arm/syscalls/delete_module.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(delete_module)
     mov     ip, r7
     ldr     r7, =__NR_delete_module
diff --git a/libc/arch-arm/syscalls/dup.S b/libc/arch-arm/syscalls/dup.S
index b1859d9..4105438 100644
--- a/libc/arch-arm/syscalls/dup.S
+++ b/libc/arch-arm/syscalls/dup.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(dup)
     mov     ip, r7
     ldr     r7, =__NR_dup
diff --git a/libc/arch-arm/syscalls/dup3.S b/libc/arch-arm/syscalls/dup3.S
index 3e47c10..409e8f9 100644
--- a/libc/arch-arm/syscalls/dup3.S
+++ b/libc/arch-arm/syscalls/dup3.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(dup3)
     mov     ip, r7
     ldr     r7, =__NR_dup3
diff --git a/libc/arch-arm/syscalls/epoll_create1.S b/libc/arch-arm/syscalls/epoll_create1.S
index 2eebc0c..631afab 100644
--- a/libc/arch-arm/syscalls/epoll_create1.S
+++ b/libc/arch-arm/syscalls/epoll_create1.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(epoll_create1)
     mov     ip, r7
     ldr     r7, =__NR_epoll_create1
diff --git a/libc/arch-arm/syscalls/epoll_ctl.S b/libc/arch-arm/syscalls/epoll_ctl.S
index 7a1cc41..187fe0a 100644
--- a/libc/arch-arm/syscalls/epoll_ctl.S
+++ b/libc/arch-arm/syscalls/epoll_ctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(epoll_ctl)
     mov     ip, r7
     ldr     r7, =__NR_epoll_ctl
diff --git a/libc/arch-arm/syscalls/eventfd.S b/libc/arch-arm/syscalls/eventfd.S
index 08272d3..c35f537 100644
--- a/libc/arch-arm/syscalls/eventfd.S
+++ b/libc/arch-arm/syscalls/eventfd.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(eventfd)
     mov     ip, r7
     ldr     r7, =__NR_eventfd2
diff --git a/libc/arch-arm/syscalls/execve.S b/libc/arch-arm/syscalls/execve.S
index 361ec63..1b24f76 100644
--- a/libc/arch-arm/syscalls/execve.S
+++ b/libc/arch-arm/syscalls/execve.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(execve)
     mov     ip, r7
     ldr     r7, =__NR_execve
diff --git a/libc/arch-arm/syscalls/faccessat.S b/libc/arch-arm/syscalls/faccessat.S
index c82b2ce..3f663e3 100644
--- a/libc/arch-arm/syscalls/faccessat.S
+++ b/libc/arch-arm/syscalls/faccessat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(faccessat)
     mov     ip, r7
     ldr     r7, =__NR_faccessat
diff --git a/libc/arch-arm/syscalls/fallocate64.S b/libc/arch-arm/syscalls/fallocate64.S
index c6992b0..fd90637 100644
--- a/libc/arch-arm/syscalls/fallocate64.S
+++ b/libc/arch-arm/syscalls/fallocate64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fallocate64)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/fchdir.S b/libc/arch-arm/syscalls/fchdir.S
index 1a7eb51..c109718 100644
--- a/libc/arch-arm/syscalls/fchdir.S
+++ b/libc/arch-arm/syscalls/fchdir.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchdir)
     mov     ip, r7
     ldr     r7, =__NR_fchdir
diff --git a/libc/arch-arm/syscalls/fchmod.S b/libc/arch-arm/syscalls/fchmod.S
index 42dc5b8..4b598a2 100644
--- a/libc/arch-arm/syscalls/fchmod.S
+++ b/libc/arch-arm/syscalls/fchmod.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchmod)
     mov     ip, r7
     ldr     r7, =__NR_fchmod
diff --git a/libc/arch-arm/syscalls/fchmodat.S b/libc/arch-arm/syscalls/fchmodat.S
index e03da8c..8e43118 100644
--- a/libc/arch-arm/syscalls/fchmodat.S
+++ b/libc/arch-arm/syscalls/fchmodat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchmodat)
     mov     ip, r7
     ldr     r7, =__NR_fchmodat
diff --git a/libc/arch-arm/syscalls/fchown.S b/libc/arch-arm/syscalls/fchown.S
index c2c3982..24a38f6 100644
--- a/libc/arch-arm/syscalls/fchown.S
+++ b/libc/arch-arm/syscalls/fchown.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchown)
     mov     ip, r7
     ldr     r7, =__NR_fchown32
diff --git a/libc/arch-arm/syscalls/fchownat.S b/libc/arch-arm/syscalls/fchownat.S
index ea8193f..8fd76a3 100644
--- a/libc/arch-arm/syscalls/fchownat.S
+++ b/libc/arch-arm/syscalls/fchownat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchownat)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/fdatasync.S b/libc/arch-arm/syscalls/fdatasync.S
index 9c8317d..9556665 100644
--- a/libc/arch-arm/syscalls/fdatasync.S
+++ b/libc/arch-arm/syscalls/fdatasync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fdatasync)
     mov     ip, r7
     ldr     r7, =__NR_fdatasync
diff --git a/libc/arch-arm/syscalls/fgetxattr.S b/libc/arch-arm/syscalls/fgetxattr.S
index bef536b..95e2809 100644
--- a/libc/arch-arm/syscalls/fgetxattr.S
+++ b/libc/arch-arm/syscalls/fgetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fgetxattr)
     mov     ip, r7
     ldr     r7, =__NR_fgetxattr
diff --git a/libc/arch-arm/syscalls/flistxattr.S b/libc/arch-arm/syscalls/flistxattr.S
index d9a30bb..0d411b1 100644
--- a/libc/arch-arm/syscalls/flistxattr.S
+++ b/libc/arch-arm/syscalls/flistxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(flistxattr)
     mov     ip, r7
     ldr     r7, =__NR_flistxattr
diff --git a/libc/arch-arm/syscalls/flock.S b/libc/arch-arm/syscalls/flock.S
index 016e824..e59d4f6 100644
--- a/libc/arch-arm/syscalls/flock.S
+++ b/libc/arch-arm/syscalls/flock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(flock)
     mov     ip, r7
     ldr     r7, =__NR_flock
diff --git a/libc/arch-arm/syscalls/fremovexattr.S b/libc/arch-arm/syscalls/fremovexattr.S
index c7ff034..3ec647f 100644
--- a/libc/arch-arm/syscalls/fremovexattr.S
+++ b/libc/arch-arm/syscalls/fremovexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fremovexattr)
     mov     ip, r7
     ldr     r7, =__NR_fremovexattr
diff --git a/libc/arch-arm/syscalls/fsetxattr.S b/libc/arch-arm/syscalls/fsetxattr.S
index 64b8d03..225e64b 100644
--- a/libc/arch-arm/syscalls/fsetxattr.S
+++ b/libc/arch-arm/syscalls/fsetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fsetxattr)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/fstat64.S b/libc/arch-arm/syscalls/fstat64.S
index 7517a65..560bb94 100644
--- a/libc/arch-arm/syscalls/fstat64.S
+++ b/libc/arch-arm/syscalls/fstat64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fstat64)
     mov     ip, r7
     ldr     r7, =__NR_fstat64
diff --git a/libc/arch-arm/syscalls/fstatat64.S b/libc/arch-arm/syscalls/fstatat64.S
index 752ee2f..cda5845 100644
--- a/libc/arch-arm/syscalls/fstatat64.S
+++ b/libc/arch-arm/syscalls/fstatat64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fstatat64)
     mov     ip, r7
     ldr     r7, =__NR_fstatat64
diff --git a/libc/arch-arm/syscalls/fsync.S b/libc/arch-arm/syscalls/fsync.S
index 6b7c4a8..c6ba47b 100644
--- a/libc/arch-arm/syscalls/fsync.S
+++ b/libc/arch-arm/syscalls/fsync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fsync)
     mov     ip, r7
     ldr     r7, =__NR_fsync
diff --git a/libc/arch-arm/syscalls/ftruncate.S b/libc/arch-arm/syscalls/ftruncate.S
index 4a3d56c..168d722 100644
--- a/libc/arch-arm/syscalls/ftruncate.S
+++ b/libc/arch-arm/syscalls/ftruncate.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(ftruncate)
     mov     ip, r7
     ldr     r7, =__NR_ftruncate
diff --git a/libc/arch-arm/syscalls/ftruncate64.S b/libc/arch-arm/syscalls/ftruncate64.S
index 910ca68..a2b73b8 100644
--- a/libc/arch-arm/syscalls/ftruncate64.S
+++ b/libc/arch-arm/syscalls/ftruncate64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(ftruncate64)
     mov     ip, r7
     ldr     r7, =__NR_ftruncate64
diff --git a/libc/arch-arm/syscalls/getegid.S b/libc/arch-arm/syscalls/getegid.S
index 6afca90..e2f9fe9 100644
--- a/libc/arch-arm/syscalls/getegid.S
+++ b/libc/arch-arm/syscalls/getegid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getegid)
     mov     ip, r7
     ldr     r7, =__NR_getegid32
diff --git a/libc/arch-arm/syscalls/geteuid.S b/libc/arch-arm/syscalls/geteuid.S
index 78e5cf4..1d55320 100644
--- a/libc/arch-arm/syscalls/geteuid.S
+++ b/libc/arch-arm/syscalls/geteuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(geteuid)
     mov     ip, r7
     ldr     r7, =__NR_geteuid32
diff --git a/libc/arch-arm/syscalls/getgid.S b/libc/arch-arm/syscalls/getgid.S
index c2d3538..9d81d73 100644
--- a/libc/arch-arm/syscalls/getgid.S
+++ b/libc/arch-arm/syscalls/getgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getgid)
     mov     ip, r7
     ldr     r7, =__NR_getgid32
diff --git a/libc/arch-arm/syscalls/getgroups.S b/libc/arch-arm/syscalls/getgroups.S
index e6b8e10..23aafaf 100644
--- a/libc/arch-arm/syscalls/getgroups.S
+++ b/libc/arch-arm/syscalls/getgroups.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getgroups)
     mov     ip, r7
     ldr     r7, =__NR_getgroups32
diff --git a/libc/arch-arm/syscalls/getitimer.S b/libc/arch-arm/syscalls/getitimer.S
index 3dce707..095cf8f 100644
--- a/libc/arch-arm/syscalls/getitimer.S
+++ b/libc/arch-arm/syscalls/getitimer.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getitimer)
     mov     ip, r7
     ldr     r7, =__NR_getitimer
diff --git a/libc/arch-arm/syscalls/getpeername.S b/libc/arch-arm/syscalls/getpeername.S
index 0613231..760f6fb 100644
--- a/libc/arch-arm/syscalls/getpeername.S
+++ b/libc/arch-arm/syscalls/getpeername.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getpeername)
     mov     ip, r7
     ldr     r7, =__NR_getpeername
diff --git a/libc/arch-arm/syscalls/getpgid.S b/libc/arch-arm/syscalls/getpgid.S
index 1992afc..d07b058 100644
--- a/libc/arch-arm/syscalls/getpgid.S
+++ b/libc/arch-arm/syscalls/getpgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getpgid)
     mov     ip, r7
     ldr     r7, =__NR_getpgid
diff --git a/libc/arch-arm/syscalls/getppid.S b/libc/arch-arm/syscalls/getppid.S
index 594fca5..bcc13a8 100644
--- a/libc/arch-arm/syscalls/getppid.S
+++ b/libc/arch-arm/syscalls/getppid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getppid)
     mov     ip, r7
     ldr     r7, =__NR_getppid
diff --git a/libc/arch-arm/syscalls/getresgid.S b/libc/arch-arm/syscalls/getresgid.S
index 9dcdb33..9a87eaa 100644
--- a/libc/arch-arm/syscalls/getresgid.S
+++ b/libc/arch-arm/syscalls/getresgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getresgid)
     mov     ip, r7
     ldr     r7, =__NR_getresgid32
diff --git a/libc/arch-arm/syscalls/getresuid.S b/libc/arch-arm/syscalls/getresuid.S
index 387bd7c..a332928 100644
--- a/libc/arch-arm/syscalls/getresuid.S
+++ b/libc/arch-arm/syscalls/getresuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getresuid)
     mov     ip, r7
     ldr     r7, =__NR_getresuid32
diff --git a/libc/arch-arm/syscalls/getrlimit.S b/libc/arch-arm/syscalls/getrlimit.S
index 879b666..4a9c62a 100644
--- a/libc/arch-arm/syscalls/getrlimit.S
+++ b/libc/arch-arm/syscalls/getrlimit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getrlimit)
     mov     ip, r7
     ldr     r7, =__NR_ugetrlimit
diff --git a/libc/arch-arm/syscalls/getrusage.S b/libc/arch-arm/syscalls/getrusage.S
index ee84f49..4799b69 100644
--- a/libc/arch-arm/syscalls/getrusage.S
+++ b/libc/arch-arm/syscalls/getrusage.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getrusage)
     mov     ip, r7
     ldr     r7, =__NR_getrusage
diff --git a/libc/arch-arm/syscalls/getsid.S b/libc/arch-arm/syscalls/getsid.S
index 715f217..5a26e94 100644
--- a/libc/arch-arm/syscalls/getsid.S
+++ b/libc/arch-arm/syscalls/getsid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsid)
     mov     ip, r7
     ldr     r7, =__NR_getsid
diff --git a/libc/arch-arm/syscalls/getsockname.S b/libc/arch-arm/syscalls/getsockname.S
index 2ee68f3..78e0752 100644
--- a/libc/arch-arm/syscalls/getsockname.S
+++ b/libc/arch-arm/syscalls/getsockname.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsockname)
     mov     ip, r7
     ldr     r7, =__NR_getsockname
diff --git a/libc/arch-arm/syscalls/getsockopt.S b/libc/arch-arm/syscalls/getsockopt.S
index 2ded34f..e1badfb 100644
--- a/libc/arch-arm/syscalls/getsockopt.S
+++ b/libc/arch-arm/syscalls/getsockopt.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsockopt)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/gettimeofday.S b/libc/arch-arm/syscalls/gettimeofday.S
index 4d33b5d..611c0d4 100644
--- a/libc/arch-arm/syscalls/gettimeofday.S
+++ b/libc/arch-arm/syscalls/gettimeofday.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(gettimeofday)
     mov     ip, r7
     ldr     r7, =__NR_gettimeofday
diff --git a/libc/arch-arm/syscalls/getuid.S b/libc/arch-arm/syscalls/getuid.S
index 66f570f..2e97c55 100644
--- a/libc/arch-arm/syscalls/getuid.S
+++ b/libc/arch-arm/syscalls/getuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getuid)
     mov     ip, r7
     ldr     r7, =__NR_getuid32
diff --git a/libc/arch-arm/syscalls/getxattr.S b/libc/arch-arm/syscalls/getxattr.S
index 71d0035..da0e86d 100644
--- a/libc/arch-arm/syscalls/getxattr.S
+++ b/libc/arch-arm/syscalls/getxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getxattr)
     mov     ip, r7
     ldr     r7, =__NR_getxattr
diff --git a/libc/arch-arm/syscalls/init_module.S b/libc/arch-arm/syscalls/init_module.S
index 6850ddf..bf30b03 100644
--- a/libc/arch-arm/syscalls/init_module.S
+++ b/libc/arch-arm/syscalls/init_module.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(init_module)
     mov     ip, r7
     ldr     r7, =__NR_init_module
diff --git a/libc/arch-arm/syscalls/inotify_add_watch.S b/libc/arch-arm/syscalls/inotify_add_watch.S
index 367a49f..982d338 100644
--- a/libc/arch-arm/syscalls/inotify_add_watch.S
+++ b/libc/arch-arm/syscalls/inotify_add_watch.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_add_watch)
     mov     ip, r7
     ldr     r7, =__NR_inotify_add_watch
diff --git a/libc/arch-arm/syscalls/inotify_init1.S b/libc/arch-arm/syscalls/inotify_init1.S
index 13e175f..2253ec8 100644
--- a/libc/arch-arm/syscalls/inotify_init1.S
+++ b/libc/arch-arm/syscalls/inotify_init1.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_init1)
     mov     ip, r7
     ldr     r7, =__NR_inotify_init1
diff --git a/libc/arch-arm/syscalls/inotify_rm_watch.S b/libc/arch-arm/syscalls/inotify_rm_watch.S
index b80e0f8..9d7e6ae 100644
--- a/libc/arch-arm/syscalls/inotify_rm_watch.S
+++ b/libc/arch-arm/syscalls/inotify_rm_watch.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_rm_watch)
     mov     ip, r7
     ldr     r7, =__NR_inotify_rm_watch
diff --git a/libc/arch-arm/syscalls/kill.S b/libc/arch-arm/syscalls/kill.S
index 9a44208..7e4d6c4 100644
--- a/libc/arch-arm/syscalls/kill.S
+++ b/libc/arch-arm/syscalls/kill.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(kill)
     mov     ip, r7
     ldr     r7, =__NR_kill
diff --git a/libc/arch-arm/syscalls/klogctl.S b/libc/arch-arm/syscalls/klogctl.S
index 84ce7f6..f5fe27f 100644
--- a/libc/arch-arm/syscalls/klogctl.S
+++ b/libc/arch-arm/syscalls/klogctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(klogctl)
     mov     ip, r7
     ldr     r7, =__NR_syslog
diff --git a/libc/arch-arm/syscalls/lgetxattr.S b/libc/arch-arm/syscalls/lgetxattr.S
index 9eed67f..70b7235 100644
--- a/libc/arch-arm/syscalls/lgetxattr.S
+++ b/libc/arch-arm/syscalls/lgetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lgetxattr)
     mov     ip, r7
     ldr     r7, =__NR_lgetxattr
diff --git a/libc/arch-arm/syscalls/linkat.S b/libc/arch-arm/syscalls/linkat.S
index 27f1e00..7a578f8 100644
--- a/libc/arch-arm/syscalls/linkat.S
+++ b/libc/arch-arm/syscalls/linkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(linkat)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/listen.S b/libc/arch-arm/syscalls/listen.S
index 330ea56..5c33912 100644
--- a/libc/arch-arm/syscalls/listen.S
+++ b/libc/arch-arm/syscalls/listen.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(listen)
     mov     ip, r7
     ldr     r7, =__NR_listen
diff --git a/libc/arch-arm/syscalls/listxattr.S b/libc/arch-arm/syscalls/listxattr.S
index c64e484..ea8f5d8 100644
--- a/libc/arch-arm/syscalls/listxattr.S
+++ b/libc/arch-arm/syscalls/listxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(listxattr)
     mov     ip, r7
     ldr     r7, =__NR_listxattr
diff --git a/libc/arch-arm/syscalls/llistxattr.S b/libc/arch-arm/syscalls/llistxattr.S
index cea926b..b7f3375 100644
--- a/libc/arch-arm/syscalls/llistxattr.S
+++ b/libc/arch-arm/syscalls/llistxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(llistxattr)
     mov     ip, r7
     ldr     r7, =__NR_llistxattr
diff --git a/libc/arch-arm/syscalls/lremovexattr.S b/libc/arch-arm/syscalls/lremovexattr.S
index c7a6458..a8d0d2d 100644
--- a/libc/arch-arm/syscalls/lremovexattr.S
+++ b/libc/arch-arm/syscalls/lremovexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lremovexattr)
     mov     ip, r7
     ldr     r7, =__NR_lremovexattr
diff --git a/libc/arch-arm/syscalls/lseek.S b/libc/arch-arm/syscalls/lseek.S
index 9edae37..17697d4 100644
--- a/libc/arch-arm/syscalls/lseek.S
+++ b/libc/arch-arm/syscalls/lseek.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lseek)
     mov     ip, r7
     ldr     r7, =__NR_lseek
diff --git a/libc/arch-arm/syscalls/lsetxattr.S b/libc/arch-arm/syscalls/lsetxattr.S
index fb3f75f..166ef7f 100644
--- a/libc/arch-arm/syscalls/lsetxattr.S
+++ b/libc/arch-arm/syscalls/lsetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lsetxattr)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/madvise.S b/libc/arch-arm/syscalls/madvise.S
index ee2c2a5..ffa71c4 100644
--- a/libc/arch-arm/syscalls/madvise.S
+++ b/libc/arch-arm/syscalls/madvise.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(madvise)
     mov     ip, r7
     ldr     r7, =__NR_madvise
diff --git a/libc/arch-arm/syscalls/mincore.S b/libc/arch-arm/syscalls/mincore.S
index 9ef9237..5eb5f10 100644
--- a/libc/arch-arm/syscalls/mincore.S
+++ b/libc/arch-arm/syscalls/mincore.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mincore)
     mov     ip, r7
     ldr     r7, =__NR_mincore
diff --git a/libc/arch-arm/syscalls/mkdirat.S b/libc/arch-arm/syscalls/mkdirat.S
index 9e77ef0..d9c58ad 100644
--- a/libc/arch-arm/syscalls/mkdirat.S
+++ b/libc/arch-arm/syscalls/mkdirat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mkdirat)
     mov     ip, r7
     ldr     r7, =__NR_mkdirat
diff --git a/libc/arch-arm/syscalls/mknodat.S b/libc/arch-arm/syscalls/mknodat.S
index de492da..d6296f1 100644
--- a/libc/arch-arm/syscalls/mknodat.S
+++ b/libc/arch-arm/syscalls/mknodat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mknodat)
     mov     ip, r7
     ldr     r7, =__NR_mknodat
diff --git a/libc/arch-arm/syscalls/mlock.S b/libc/arch-arm/syscalls/mlock.S
index 043b21b..21fd5f9 100644
--- a/libc/arch-arm/syscalls/mlock.S
+++ b/libc/arch-arm/syscalls/mlock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mlock)
     mov     ip, r7
     ldr     r7, =__NR_mlock
diff --git a/libc/arch-arm/syscalls/mlockall.S b/libc/arch-arm/syscalls/mlockall.S
index 9c6c4e4..750b7ec 100644
--- a/libc/arch-arm/syscalls/mlockall.S
+++ b/libc/arch-arm/syscalls/mlockall.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mlockall)
     mov     ip, r7
     ldr     r7, =__NR_mlockall
diff --git a/libc/arch-arm/syscalls/mount.S b/libc/arch-arm/syscalls/mount.S
index d56682c..d2fa20e 100644
--- a/libc/arch-arm/syscalls/mount.S
+++ b/libc/arch-arm/syscalls/mount.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mount)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/mprotect.S b/libc/arch-arm/syscalls/mprotect.S
index 9461d9b..dfc6f08 100644
--- a/libc/arch-arm/syscalls/mprotect.S
+++ b/libc/arch-arm/syscalls/mprotect.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mprotect)
     mov     ip, r7
     ldr     r7, =__NR_mprotect
diff --git a/libc/arch-arm/syscalls/mremap.S b/libc/arch-arm/syscalls/mremap.S
index 2486fc9..a674571 100644
--- a/libc/arch-arm/syscalls/mremap.S
+++ b/libc/arch-arm/syscalls/mremap.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mremap)
     mov     ip, r7
     ldr     r7, =__NR_mremap
diff --git a/libc/arch-arm/syscalls/msync.S b/libc/arch-arm/syscalls/msync.S
index 3fc4118..e062a5e 100644
--- a/libc/arch-arm/syscalls/msync.S
+++ b/libc/arch-arm/syscalls/msync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(msync)
     mov     ip, r7
     ldr     r7, =__NR_msync
diff --git a/libc/arch-arm/syscalls/munlock.S b/libc/arch-arm/syscalls/munlock.S
index c89fd3c..c44d147 100644
--- a/libc/arch-arm/syscalls/munlock.S
+++ b/libc/arch-arm/syscalls/munlock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munlock)
     mov     ip, r7
     ldr     r7, =__NR_munlock
diff --git a/libc/arch-arm/syscalls/munlockall.S b/libc/arch-arm/syscalls/munlockall.S
index 3ac9f32..3a36b7e 100644
--- a/libc/arch-arm/syscalls/munlockall.S
+++ b/libc/arch-arm/syscalls/munlockall.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munlockall)
     mov     ip, r7
     ldr     r7, =__NR_munlockall
diff --git a/libc/arch-arm/syscalls/munmap.S b/libc/arch-arm/syscalls/munmap.S
index ed3bb1e..a94e4e5 100644
--- a/libc/arch-arm/syscalls/munmap.S
+++ b/libc/arch-arm/syscalls/munmap.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munmap)
     mov     ip, r7
     ldr     r7, =__NR_munmap
diff --git a/libc/arch-arm/syscalls/nanosleep.S b/libc/arch-arm/syscalls/nanosleep.S
index 695c126..743adc2 100644
--- a/libc/arch-arm/syscalls/nanosleep.S
+++ b/libc/arch-arm/syscalls/nanosleep.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(nanosleep)
     mov     ip, r7
     ldr     r7, =__NR_nanosleep
diff --git a/libc/arch-arm/syscalls/personality.S b/libc/arch-arm/syscalls/personality.S
index e3f7371..90dfe22 100644
--- a/libc/arch-arm/syscalls/personality.S
+++ b/libc/arch-arm/syscalls/personality.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(personality)
     mov     ip, r7
     ldr     r7, =__NR_personality
diff --git a/libc/arch-arm/syscalls/pipe2.S b/libc/arch-arm/syscalls/pipe2.S
index 420dee9..b295df5 100644
--- a/libc/arch-arm/syscalls/pipe2.S
+++ b/libc/arch-arm/syscalls/pipe2.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pipe2)
     mov     ip, r7
     ldr     r7, =__NR_pipe2
diff --git a/libc/arch-arm/syscalls/prctl.S b/libc/arch-arm/syscalls/prctl.S
index 615a2fa..c8f68d3 100644
--- a/libc/arch-arm/syscalls/prctl.S
+++ b/libc/arch-arm/syscalls/prctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(prctl)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/pread64.S b/libc/arch-arm/syscalls/pread64.S
index 0bfb6d0..3eeae3d 100644
--- a/libc/arch-arm/syscalls/pread64.S
+++ b/libc/arch-arm/syscalls/pread64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pread64)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/prlimit64.S b/libc/arch-arm/syscalls/prlimit64.S
index 8d9c4ff..87c53d5 100644
--- a/libc/arch-arm/syscalls/prlimit64.S
+++ b/libc/arch-arm/syscalls/prlimit64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(prlimit64)
     mov     ip, r7
     ldr     r7, =__NR_prlimit64
diff --git a/libc/arch-arm/syscalls/pwrite64.S b/libc/arch-arm/syscalls/pwrite64.S
index 03247b1..c63b835 100644
--- a/libc/arch-arm/syscalls/pwrite64.S
+++ b/libc/arch-arm/syscalls/pwrite64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pwrite64)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/read.S b/libc/arch-arm/syscalls/read.S
index b01daf5..9de525c 100644
--- a/libc/arch-arm/syscalls/read.S
+++ b/libc/arch-arm/syscalls/read.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(read)
     mov     ip, r7
     ldr     r7, =__NR_read
diff --git a/libc/arch-arm/syscalls/readahead.S b/libc/arch-arm/syscalls/readahead.S
index 83d8442..995f00e 100644
--- a/libc/arch-arm/syscalls/readahead.S
+++ b/libc/arch-arm/syscalls/readahead.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readahead)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/readlinkat.S b/libc/arch-arm/syscalls/readlinkat.S
index 28926ab..f865de5 100644
--- a/libc/arch-arm/syscalls/readlinkat.S
+++ b/libc/arch-arm/syscalls/readlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readlinkat)
     mov     ip, r7
     ldr     r7, =__NR_readlinkat
diff --git a/libc/arch-arm/syscalls/readv.S b/libc/arch-arm/syscalls/readv.S
index 433d33d..9401687 100644
--- a/libc/arch-arm/syscalls/readv.S
+++ b/libc/arch-arm/syscalls/readv.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readv)
     mov     ip, r7
     ldr     r7, =__NR_readv
diff --git a/libc/arch-arm/syscalls/recvfrom.S b/libc/arch-arm/syscalls/recvfrom.S
index cb89f72..6390a82 100644
--- a/libc/arch-arm/syscalls/recvfrom.S
+++ b/libc/arch-arm/syscalls/recvfrom.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvfrom)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/recvmmsg.S b/libc/arch-arm/syscalls/recvmmsg.S
index dd8cd8c..067ed1e 100644
--- a/libc/arch-arm/syscalls/recvmmsg.S
+++ b/libc/arch-arm/syscalls/recvmmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvmmsg)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/recvmsg.S b/libc/arch-arm/syscalls/recvmsg.S
index 47e82a7..f688481 100644
--- a/libc/arch-arm/syscalls/recvmsg.S
+++ b/libc/arch-arm/syscalls/recvmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvmsg)
     mov     ip, r7
     ldr     r7, =__NR_recvmsg
diff --git a/libc/arch-arm/syscalls/removexattr.S b/libc/arch-arm/syscalls/removexattr.S
index a3fcdfa..59d0e2f 100644
--- a/libc/arch-arm/syscalls/removexattr.S
+++ b/libc/arch-arm/syscalls/removexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(removexattr)
     mov     ip, r7
     ldr     r7, =__NR_removexattr
diff --git a/libc/arch-arm/syscalls/renameat.S b/libc/arch-arm/syscalls/renameat.S
index cea6286..7a4d268 100644
--- a/libc/arch-arm/syscalls/renameat.S
+++ b/libc/arch-arm/syscalls/renameat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(renameat)
     mov     ip, r7
     ldr     r7, =__NR_renameat
diff --git a/libc/arch-arm/syscalls/sched_get_priority_max.S b/libc/arch-arm/syscalls/sched_get_priority_max.S
index c940adc..2aafafc 100644
--- a/libc/arch-arm/syscalls/sched_get_priority_max.S
+++ b/libc/arch-arm/syscalls/sched_get_priority_max.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_get_priority_max)
     mov     ip, r7
     ldr     r7, =__NR_sched_get_priority_max
diff --git a/libc/arch-arm/syscalls/sched_get_priority_min.S b/libc/arch-arm/syscalls/sched_get_priority_min.S
index 39faede..40e14ef 100644
--- a/libc/arch-arm/syscalls/sched_get_priority_min.S
+++ b/libc/arch-arm/syscalls/sched_get_priority_min.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_get_priority_min)
     mov     ip, r7
     ldr     r7, =__NR_sched_get_priority_min
diff --git a/libc/arch-arm/syscalls/sched_getparam.S b/libc/arch-arm/syscalls/sched_getparam.S
index 59df104..3d58651 100644
--- a/libc/arch-arm/syscalls/sched_getparam.S
+++ b/libc/arch-arm/syscalls/sched_getparam.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_getparam)
     mov     ip, r7
     ldr     r7, =__NR_sched_getparam
diff --git a/libc/arch-arm/syscalls/sched_getscheduler.S b/libc/arch-arm/syscalls/sched_getscheduler.S
index 953368d..e9478ca 100644
--- a/libc/arch-arm/syscalls/sched_getscheduler.S
+++ b/libc/arch-arm/syscalls/sched_getscheduler.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_getscheduler)
     mov     ip, r7
     ldr     r7, =__NR_sched_getscheduler
diff --git a/libc/arch-arm/syscalls/sched_rr_get_interval.S b/libc/arch-arm/syscalls/sched_rr_get_interval.S
index 1fa7d15..ed90b73 100644
--- a/libc/arch-arm/syscalls/sched_rr_get_interval.S
+++ b/libc/arch-arm/syscalls/sched_rr_get_interval.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_rr_get_interval)
     mov     ip, r7
     ldr     r7, =__NR_sched_rr_get_interval
diff --git a/libc/arch-arm/syscalls/sched_setaffinity.S b/libc/arch-arm/syscalls/sched_setaffinity.S
index 63bfe4d..d5f72a9 100644
--- a/libc/arch-arm/syscalls/sched_setaffinity.S
+++ b/libc/arch-arm/syscalls/sched_setaffinity.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setaffinity)
     mov     ip, r7
     ldr     r7, =__NR_sched_setaffinity
diff --git a/libc/arch-arm/syscalls/sched_setparam.S b/libc/arch-arm/syscalls/sched_setparam.S
index 324f0bb..3ec06c0 100644
--- a/libc/arch-arm/syscalls/sched_setparam.S
+++ b/libc/arch-arm/syscalls/sched_setparam.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setparam)
     mov     ip, r7
     ldr     r7, =__NR_sched_setparam
diff --git a/libc/arch-arm/syscalls/sched_setscheduler.S b/libc/arch-arm/syscalls/sched_setscheduler.S
index 0ce6b15..0e61ffb 100644
--- a/libc/arch-arm/syscalls/sched_setscheduler.S
+++ b/libc/arch-arm/syscalls/sched_setscheduler.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setscheduler)
     mov     ip, r7
     ldr     r7, =__NR_sched_setscheduler
diff --git a/libc/arch-arm/syscalls/sched_yield.S b/libc/arch-arm/syscalls/sched_yield.S
index 8e6d65a..f26297e 100644
--- a/libc/arch-arm/syscalls/sched_yield.S
+++ b/libc/arch-arm/syscalls/sched_yield.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_yield)
     mov     ip, r7
     ldr     r7, =__NR_sched_yield
diff --git a/libc/arch-arm/syscalls/sendfile.S b/libc/arch-arm/syscalls/sendfile.S
index 28b25a3..e4df8ff 100644
--- a/libc/arch-arm/syscalls/sendfile.S
+++ b/libc/arch-arm/syscalls/sendfile.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendfile)
     mov     ip, r7
     ldr     r7, =__NR_sendfile
diff --git a/libc/arch-arm/syscalls/sendfile64.S b/libc/arch-arm/syscalls/sendfile64.S
index 4a9f245..ab48963 100644
--- a/libc/arch-arm/syscalls/sendfile64.S
+++ b/libc/arch-arm/syscalls/sendfile64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendfile64)
     mov     ip, r7
     ldr     r7, =__NR_sendfile64
diff --git a/libc/arch-arm/syscalls/sendmmsg.S b/libc/arch-arm/syscalls/sendmmsg.S
index 04c3fe3..998e6c7 100644
--- a/libc/arch-arm/syscalls/sendmmsg.S
+++ b/libc/arch-arm/syscalls/sendmmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendmmsg)
     mov     ip, r7
     ldr     r7, =__NR_sendmmsg
diff --git a/libc/arch-arm/syscalls/sendmsg.S b/libc/arch-arm/syscalls/sendmsg.S
index 554f307..d25d6b4 100644
--- a/libc/arch-arm/syscalls/sendmsg.S
+++ b/libc/arch-arm/syscalls/sendmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendmsg)
     mov     ip, r7
     ldr     r7, =__NR_sendmsg
diff --git a/libc/arch-arm/syscalls/sendto.S b/libc/arch-arm/syscalls/sendto.S
index bd0ec1d..b5e8de9 100644
--- a/libc/arch-arm/syscalls/sendto.S
+++ b/libc/arch-arm/syscalls/sendto.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendto)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/setfsgid.S b/libc/arch-arm/syscalls/setfsgid.S
index e36e6ea..7cdb610 100644
--- a/libc/arch-arm/syscalls/setfsgid.S
+++ b/libc/arch-arm/syscalls/setfsgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setfsgid)
     mov     ip, r7
     ldr     r7, =__NR_setfsgid
diff --git a/libc/arch-arm/syscalls/setfsuid.S b/libc/arch-arm/syscalls/setfsuid.S
index e3c9c00..ae65298 100644
--- a/libc/arch-arm/syscalls/setfsuid.S
+++ b/libc/arch-arm/syscalls/setfsuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setfsuid)
     mov     ip, r7
     ldr     r7, =__NR_setfsuid
diff --git a/libc/arch-arm/syscalls/setgid.S b/libc/arch-arm/syscalls/setgid.S
index fb38148..15583ac 100644
--- a/libc/arch-arm/syscalls/setgid.S
+++ b/libc/arch-arm/syscalls/setgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setgid)
     mov     ip, r7
     ldr     r7, =__NR_setgid32
diff --git a/libc/arch-arm/syscalls/setgroups.S b/libc/arch-arm/syscalls/setgroups.S
index 5420a53..eb610b1 100644
--- a/libc/arch-arm/syscalls/setgroups.S
+++ b/libc/arch-arm/syscalls/setgroups.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setgroups)
     mov     ip, r7
     ldr     r7, =__NR_setgroups32
diff --git a/libc/arch-arm/syscalls/setitimer.S b/libc/arch-arm/syscalls/setitimer.S
index 2345e5b..4da2b40 100644
--- a/libc/arch-arm/syscalls/setitimer.S
+++ b/libc/arch-arm/syscalls/setitimer.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setitimer)
     mov     ip, r7
     ldr     r7, =__NR_setitimer
diff --git a/libc/arch-arm/syscalls/setns.S b/libc/arch-arm/syscalls/setns.S
index 7afbff0..891a0ac 100644
--- a/libc/arch-arm/syscalls/setns.S
+++ b/libc/arch-arm/syscalls/setns.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setns)
     mov     ip, r7
     ldr     r7, =__NR_setns
diff --git a/libc/arch-arm/syscalls/setpgid.S b/libc/arch-arm/syscalls/setpgid.S
index 1470a9d..e4edcdf 100644
--- a/libc/arch-arm/syscalls/setpgid.S
+++ b/libc/arch-arm/syscalls/setpgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setpgid)
     mov     ip, r7
     ldr     r7, =__NR_setpgid
diff --git a/libc/arch-arm/syscalls/setpriority.S b/libc/arch-arm/syscalls/setpriority.S
index b7f47be..80d0d82 100644
--- a/libc/arch-arm/syscalls/setpriority.S
+++ b/libc/arch-arm/syscalls/setpriority.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setpriority)
     mov     ip, r7
     ldr     r7, =__NR_setpriority
diff --git a/libc/arch-arm/syscalls/setregid.S b/libc/arch-arm/syscalls/setregid.S
index a4323d4..b2cd345 100644
--- a/libc/arch-arm/syscalls/setregid.S
+++ b/libc/arch-arm/syscalls/setregid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setregid)
     mov     ip, r7
     ldr     r7, =__NR_setregid32
diff --git a/libc/arch-arm/syscalls/setresgid.S b/libc/arch-arm/syscalls/setresgid.S
index a578440..75a9f75 100644
--- a/libc/arch-arm/syscalls/setresgid.S
+++ b/libc/arch-arm/syscalls/setresgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setresgid)
     mov     ip, r7
     ldr     r7, =__NR_setresgid32
diff --git a/libc/arch-arm/syscalls/setresuid.S b/libc/arch-arm/syscalls/setresuid.S
index 9798bc5..f3382f2 100644
--- a/libc/arch-arm/syscalls/setresuid.S
+++ b/libc/arch-arm/syscalls/setresuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setresuid)
     mov     ip, r7
     ldr     r7, =__NR_setresuid32
diff --git a/libc/arch-arm/syscalls/setreuid.S b/libc/arch-arm/syscalls/setreuid.S
index fa83dc6..1d866e9 100644
--- a/libc/arch-arm/syscalls/setreuid.S
+++ b/libc/arch-arm/syscalls/setreuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setreuid)
     mov     ip, r7
     ldr     r7, =__NR_setreuid32
diff --git a/libc/arch-arm/syscalls/setrlimit.S b/libc/arch-arm/syscalls/setrlimit.S
index 0711aca..0ddd711 100644
--- a/libc/arch-arm/syscalls/setrlimit.S
+++ b/libc/arch-arm/syscalls/setrlimit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setrlimit)
     mov     ip, r7
     ldr     r7, =__NR_setrlimit
diff --git a/libc/arch-arm/syscalls/setsid.S b/libc/arch-arm/syscalls/setsid.S
index df6196b..69b351f 100644
--- a/libc/arch-arm/syscalls/setsid.S
+++ b/libc/arch-arm/syscalls/setsid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setsid)
     mov     ip, r7
     ldr     r7, =__NR_setsid
diff --git a/libc/arch-arm/syscalls/setsockopt.S b/libc/arch-arm/syscalls/setsockopt.S
index b2d7597..87df622 100644
--- a/libc/arch-arm/syscalls/setsockopt.S
+++ b/libc/arch-arm/syscalls/setsockopt.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setsockopt)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/settimeofday.S b/libc/arch-arm/syscalls/settimeofday.S
index af39761..76697fc 100644
--- a/libc/arch-arm/syscalls/settimeofday.S
+++ b/libc/arch-arm/syscalls/settimeofday.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(settimeofday)
     mov     ip, r7
     ldr     r7, =__NR_settimeofday
diff --git a/libc/arch-arm/syscalls/setuid.S b/libc/arch-arm/syscalls/setuid.S
index 1999c2b..26d3ed1 100644
--- a/libc/arch-arm/syscalls/setuid.S
+++ b/libc/arch-arm/syscalls/setuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setuid)
     mov     ip, r7
     ldr     r7, =__NR_setuid32
diff --git a/libc/arch-arm/syscalls/setxattr.S b/libc/arch-arm/syscalls/setxattr.S
index 022195d..ec948ce 100644
--- a/libc/arch-arm/syscalls/setxattr.S
+++ b/libc/arch-arm/syscalls/setxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setxattr)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/shutdown.S b/libc/arch-arm/syscalls/shutdown.S
index 744f384..e9a27d4 100644
--- a/libc/arch-arm/syscalls/shutdown.S
+++ b/libc/arch-arm/syscalls/shutdown.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(shutdown)
     mov     ip, r7
     ldr     r7, =__NR_shutdown
diff --git a/libc/arch-arm/syscalls/sigaltstack.S b/libc/arch-arm/syscalls/sigaltstack.S
index d8777b4..18a1ffe 100644
--- a/libc/arch-arm/syscalls/sigaltstack.S
+++ b/libc/arch-arm/syscalls/sigaltstack.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sigaltstack)
     mov     ip, r7
     ldr     r7, =__NR_sigaltstack
diff --git a/libc/arch-arm/syscalls/socketpair.S b/libc/arch-arm/syscalls/socketpair.S
index f896313..66f0c32 100644
--- a/libc/arch-arm/syscalls/socketpair.S
+++ b/libc/arch-arm/syscalls/socketpair.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(socketpair)
     mov     ip, r7
     ldr     r7, =__NR_socketpair
diff --git a/libc/arch-arm/syscalls/splice.S b/libc/arch-arm/syscalls/splice.S
index 782ba6c..6273138 100644
--- a/libc/arch-arm/syscalls/splice.S
+++ b/libc/arch-arm/syscalls/splice.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(splice)
     mov     ip, sp
     stmfd   sp!, {r4, r5, r6, r7}
diff --git a/libc/arch-arm/syscalls/swapoff.S b/libc/arch-arm/syscalls/swapoff.S
index f78bc7f..a497aad 100644
--- a/libc/arch-arm/syscalls/swapoff.S
+++ b/libc/arch-arm/syscalls/swapoff.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(swapoff)
     mov     ip, r7
     ldr     r7, =__NR_swapoff
diff --git a/libc/arch-arm/syscalls/swapon.S b/libc/arch-arm/syscalls/swapon.S
index d28216a..ded2abc 100644
--- a/libc/arch-arm/syscalls/swapon.S
+++ b/libc/arch-arm/syscalls/swapon.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(swapon)
     mov     ip, r7
     ldr     r7, =__NR_swapon
diff --git a/libc/arch-arm/syscalls/symlinkat.S b/libc/arch-arm/syscalls/symlinkat.S
index d81e43b..cc91b88 100644
--- a/libc/arch-arm/syscalls/symlinkat.S
+++ b/libc/arch-arm/syscalls/symlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(symlinkat)
     mov     ip, r7
     ldr     r7, =__NR_symlinkat
diff --git a/libc/arch-arm/syscalls/sync.S b/libc/arch-arm/syscalls/sync.S
index 279a192..ab22855 100644
--- a/libc/arch-arm/syscalls/sync.S
+++ b/libc/arch-arm/syscalls/sync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sync)
     mov     ip, r7
     ldr     r7, =__NR_sync
diff --git a/libc/arch-arm/syscalls/sysinfo.S b/libc/arch-arm/syscalls/sysinfo.S
index 6bee583..f5fb4e6 100644
--- a/libc/arch-arm/syscalls/sysinfo.S
+++ b/libc/arch-arm/syscalls/sysinfo.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sysinfo)
     mov     ip, r7
     ldr     r7, =__NR_sysinfo
diff --git a/libc/arch-arm/syscalls/tee.S b/libc/arch-arm/syscalls/tee.S
index 9174617..7e155df 100644
--- a/libc/arch-arm/syscalls/tee.S
+++ b/libc/arch-arm/syscalls/tee.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(tee)
     mov     ip, r7
     ldr     r7, =__NR_tee
diff --git a/libc/arch-arm/syscalls/tgkill.S b/libc/arch-arm/syscalls/tgkill.S
index 4ea04f5..98440b1 100644
--- a/libc/arch-arm/syscalls/tgkill.S
+++ b/libc/arch-arm/syscalls/tgkill.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(tgkill)
     mov     ip, r7
     ldr     r7, =__NR_tgkill
diff --git a/libc/arch-arm/syscalls/timerfd_create.S b/libc/arch-arm/syscalls/timerfd_create.S
index f5842e9..9211b54 100644
--- a/libc/arch-arm/syscalls/timerfd_create.S
+++ b/libc/arch-arm/syscalls/timerfd_create.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_create)
     mov     ip, r7
     ldr     r7, =__NR_timerfd_create
diff --git a/libc/arch-arm/syscalls/timerfd_gettime.S b/libc/arch-arm/syscalls/timerfd_gettime.S
index 6f254e5..c27e008 100644
--- a/libc/arch-arm/syscalls/timerfd_gettime.S
+++ b/libc/arch-arm/syscalls/timerfd_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_gettime)
     mov     ip, r7
     ldr     r7, =__NR_timerfd_gettime
diff --git a/libc/arch-arm/syscalls/timerfd_settime.S b/libc/arch-arm/syscalls/timerfd_settime.S
index 75d175c..7acd408 100644
--- a/libc/arch-arm/syscalls/timerfd_settime.S
+++ b/libc/arch-arm/syscalls/timerfd_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_settime)
     mov     ip, r7
     ldr     r7, =__NR_timerfd_settime
diff --git a/libc/arch-arm/syscalls/times.S b/libc/arch-arm/syscalls/times.S
index 4792ad1..b5695c4 100644
--- a/libc/arch-arm/syscalls/times.S
+++ b/libc/arch-arm/syscalls/times.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(times)
     mov     ip, r7
     ldr     r7, =__NR_times
diff --git a/libc/arch-arm/syscalls/truncate.S b/libc/arch-arm/syscalls/truncate.S
index ff8fd19..7915722 100644
--- a/libc/arch-arm/syscalls/truncate.S
+++ b/libc/arch-arm/syscalls/truncate.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(truncate)
     mov     ip, r7
     ldr     r7, =__NR_truncate
diff --git a/libc/arch-arm/syscalls/truncate64.S b/libc/arch-arm/syscalls/truncate64.S
index 8fd0855..d59374a 100644
--- a/libc/arch-arm/syscalls/truncate64.S
+++ b/libc/arch-arm/syscalls/truncate64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(truncate64)
     mov     ip, r7
     ldr     r7, =__NR_truncate64
diff --git a/libc/arch-arm/syscalls/umask.S b/libc/arch-arm/syscalls/umask.S
index 830af21..5b03fb3 100644
--- a/libc/arch-arm/syscalls/umask.S
+++ b/libc/arch-arm/syscalls/umask.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(umask)
     mov     ip, r7
     ldr     r7, =__NR_umask
diff --git a/libc/arch-arm/syscalls/umount2.S b/libc/arch-arm/syscalls/umount2.S
index 4c0ce4d..841eb97 100644
--- a/libc/arch-arm/syscalls/umount2.S
+++ b/libc/arch-arm/syscalls/umount2.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(umount2)
     mov     ip, r7
     ldr     r7, =__NR_umount2
diff --git a/libc/arch-arm/syscalls/uname.S b/libc/arch-arm/syscalls/uname.S
index 20a6d7d..76480b4 100644
--- a/libc/arch-arm/syscalls/uname.S
+++ b/libc/arch-arm/syscalls/uname.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(uname)
     mov     ip, r7
     ldr     r7, =__NR_uname
diff --git a/libc/arch-arm/syscalls/unlinkat.S b/libc/arch-arm/syscalls/unlinkat.S
index 1c27416..6759768 100644
--- a/libc/arch-arm/syscalls/unlinkat.S
+++ b/libc/arch-arm/syscalls/unlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(unlinkat)
     mov     ip, r7
     ldr     r7, =__NR_unlinkat
diff --git a/libc/arch-arm/syscalls/unshare.S b/libc/arch-arm/syscalls/unshare.S
index 5ec1049..19a5b6a 100644
--- a/libc/arch-arm/syscalls/unshare.S
+++ b/libc/arch-arm/syscalls/unshare.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(unshare)
     mov     ip, r7
     ldr     r7, =__NR_unshare
diff --git a/libc/arch-arm/syscalls/utimensat.S b/libc/arch-arm/syscalls/utimensat.S
index f0f834f..6d50688 100644
--- a/libc/arch-arm/syscalls/utimensat.S
+++ b/libc/arch-arm/syscalls/utimensat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(utimensat)
     mov     ip, r7
     ldr     r7, =__NR_utimensat
diff --git a/libc/arch-arm/syscalls/vfork.S b/libc/arch-arm/syscalls/vfork.S
index e12fba5..8543986 100644
--- a/libc/arch-arm/syscalls/vfork.S
+++ b/libc/arch-arm/syscalls/vfork.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(vfork)
     mov     ip, r7
     ldr     r7, =__NR_vfork
diff --git a/libc/arch-arm/syscalls/vmsplice.S b/libc/arch-arm/syscalls/vmsplice.S
index 3b89623..8239158 100644
--- a/libc/arch-arm/syscalls/vmsplice.S
+++ b/libc/arch-arm/syscalls/vmsplice.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(vmsplice)
     mov     ip, r7
     ldr     r7, =__NR_vmsplice
diff --git a/libc/arch-arm/syscalls/wait4.S b/libc/arch-arm/syscalls/wait4.S
index a197c2e..ffb2587 100644
--- a/libc/arch-arm/syscalls/wait4.S
+++ b/libc/arch-arm/syscalls/wait4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(wait4)
     mov     ip, r7
     ldr     r7, =__NR_wait4
diff --git a/libc/arch-arm/syscalls/write.S b/libc/arch-arm/syscalls/write.S
index ed7cfa2..8da1176 100644
--- a/libc/arch-arm/syscalls/write.S
+++ b/libc/arch-arm/syscalls/write.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(write)
     mov     ip, r7
     ldr     r7, =__NR_write
diff --git a/libc/arch-arm/syscalls/writev.S b/libc/arch-arm/syscalls/writev.S
index 8cc506f..f17ad94 100644
--- a/libc/arch-arm/syscalls/writev.S
+++ b/libc/arch-arm/syscalls/writev.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(writev)
     mov     ip, r7
     ldr     r7, =__NR_writev