diff --git a/libc/arch-x86_64/syscalls/__accept4.S b/libc/arch-x86_64/syscalls/__accept4.S
index 375a78b..774cdd5 100644
--- a/libc/arch-x86_64/syscalls/__accept4.S
+++ b/libc/arch-x86_64/syscalls/__accept4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__accept4)
     movq    %rcx, %r10
     movl    $__NR_accept4, %eax
diff --git a/libc/arch-x86_64/syscalls/__arch_prctl.S b/libc/arch-x86_64/syscalls/__arch_prctl.S
index 6c72a6c..c0dad45 100644
--- a/libc/arch-x86_64/syscalls/__arch_prctl.S
+++ b/libc/arch-x86_64/syscalls/__arch_prctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__arch_prctl)
     movl    $__NR_arch_prctl, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__brk.S b/libc/arch-x86_64/syscalls/__brk.S
index 18ebc10..df942a1 100644
--- a/libc/arch-x86_64/syscalls/__brk.S
+++ b/libc/arch-x86_64/syscalls/__brk.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__brk)
     movl    $__NR_brk, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__clock_gettime.S b/libc/arch-x86_64/syscalls/__clock_gettime.S
index 7e553b8..6c11fb6 100644
--- a/libc/arch-x86_64/syscalls/__clock_gettime.S
+++ b/libc/arch-x86_64/syscalls/__clock_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__clock_gettime)
     movl    $__NR_clock_gettime, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__connect.S b/libc/arch-x86_64/syscalls/__connect.S
index a7d2e93..05a8202 100644
--- a/libc/arch-x86_64/syscalls/__connect.S
+++ b/libc/arch-x86_64/syscalls/__connect.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__connect)
     movl    $__NR_connect, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__epoll_pwait.S b/libc/arch-x86_64/syscalls/__epoll_pwait.S
index 4271b53..b0aee80 100644
--- a/libc/arch-x86_64/syscalls/__epoll_pwait.S
+++ b/libc/arch-x86_64/syscalls/__epoll_pwait.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__epoll_pwait)
     movq    %rcx, %r10
     movl    $__NR_epoll_pwait, %eax
diff --git a/libc/arch-x86_64/syscalls/__exit.S b/libc/arch-x86_64/syscalls/__exit.S
index bcbaffc..e552f04 100644
--- a/libc/arch-x86_64/syscalls/__exit.S
+++ b/libc/arch-x86_64/syscalls/__exit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__exit)
     movl    $__NR_exit, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__getcpu.S b/libc/arch-x86_64/syscalls/__getcpu.S
index c25f294..c415fd7 100644
--- a/libc/arch-x86_64/syscalls/__getcpu.S
+++ b/libc/arch-x86_64/syscalls/__getcpu.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getcpu)
     movl    $__NR_getcpu, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__getcwd.S b/libc/arch-x86_64/syscalls/__getcwd.S
index 1743838..1ea5651 100644
--- a/libc/arch-x86_64/syscalls/__getcwd.S
+++ b/libc/arch-x86_64/syscalls/__getcwd.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getcwd)
     movl    $__NR_getcwd, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__getdents64.S b/libc/arch-x86_64/syscalls/__getdents64.S
index 64f82fd..42c130c 100644
--- a/libc/arch-x86_64/syscalls/__getdents64.S
+++ b/libc/arch-x86_64/syscalls/__getdents64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getdents64)
     movl    $__NR_getdents64, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__getpid.S b/libc/arch-x86_64/syscalls/__getpid.S
index bd1bf1e..ae6bb49 100644
--- a/libc/arch-x86_64/syscalls/__getpid.S
+++ b/libc/arch-x86_64/syscalls/__getpid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getpid)
     movl    $__NR_getpid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__getpriority.S b/libc/arch-x86_64/syscalls/__getpriority.S
index 349f574..c82b008 100644
--- a/libc/arch-x86_64/syscalls/__getpriority.S
+++ b/libc/arch-x86_64/syscalls/__getpriority.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__getpriority)
     movl    $__NR_getpriority, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__gettimeofday.S b/libc/arch-x86_64/syscalls/__gettimeofday.S
index a38eb64..e4b2409 100644
--- a/libc/arch-x86_64/syscalls/__gettimeofday.S
+++ b/libc/arch-x86_64/syscalls/__gettimeofday.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__gettimeofday)
     movl    $__NR_gettimeofday, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__ioctl.S b/libc/arch-x86_64/syscalls/__ioctl.S
index 2775911..aa2f538 100644
--- a/libc/arch-x86_64/syscalls/__ioctl.S
+++ b/libc/arch-x86_64/syscalls/__ioctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ioctl)
     movl    $__NR_ioctl, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__openat.S b/libc/arch-x86_64/syscalls/__openat.S
index dce4c7c..e7f5dc4 100644
--- a/libc/arch-x86_64/syscalls/__openat.S
+++ b/libc/arch-x86_64/syscalls/__openat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__openat)
     movq    %rcx, %r10
     movl    $__NR_openat, %eax
diff --git a/libc/arch-x86_64/syscalls/__ppoll.S b/libc/arch-x86_64/syscalls/__ppoll.S
index 31ba7e9..eb741ce 100644
--- a/libc/arch-x86_64/syscalls/__ppoll.S
+++ b/libc/arch-x86_64/syscalls/__ppoll.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ppoll)
     movq    %rcx, %r10
     movl    $__NR_ppoll, %eax
diff --git a/libc/arch-x86_64/syscalls/__pselect6.S b/libc/arch-x86_64/syscalls/__pselect6.S
index a212c4e..75ea416 100644
--- a/libc/arch-x86_64/syscalls/__pselect6.S
+++ b/libc/arch-x86_64/syscalls/__pselect6.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__pselect6)
     movq    %rcx, %r10
     movl    $__NR_pselect6, %eax
diff --git a/libc/arch-x86_64/syscalls/__ptrace.S b/libc/arch-x86_64/syscalls/__ptrace.S
index 0a64fee..45724e4 100644
--- a/libc/arch-x86_64/syscalls/__ptrace.S
+++ b/libc/arch-x86_64/syscalls/__ptrace.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__ptrace)
     movq    %rcx, %r10
     movl    $__NR_ptrace, %eax
diff --git a/libc/arch-x86_64/syscalls/__reboot.S b/libc/arch-x86_64/syscalls/__reboot.S
index 398d078..bbff3f2 100644
--- a/libc/arch-x86_64/syscalls/__reboot.S
+++ b/libc/arch-x86_64/syscalls/__reboot.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__reboot)
     movq    %rcx, %r10
     movl    $__NR_reboot, %eax
diff --git a/libc/arch-x86_64/syscalls/__rt_sigaction.S b/libc/arch-x86_64/syscalls/__rt_sigaction.S
index f146b02..7ce3d8c 100644
--- a/libc/arch-x86_64/syscalls/__rt_sigaction.S
+++ b/libc/arch-x86_64/syscalls/__rt_sigaction.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigaction)
     movq    %rcx, %r10
     movl    $__NR_rt_sigaction, %eax
diff --git a/libc/arch-x86_64/syscalls/__rt_sigpending.S b/libc/arch-x86_64/syscalls/__rt_sigpending.S
index 9d1698b..78c10ed 100644
--- a/libc/arch-x86_64/syscalls/__rt_sigpending.S
+++ b/libc/arch-x86_64/syscalls/__rt_sigpending.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigpending)
     movl    $__NR_rt_sigpending, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__rt_sigprocmask.S b/libc/arch-x86_64/syscalls/__rt_sigprocmask.S
index 1ac9b81..bf2841c 100644
--- a/libc/arch-x86_64/syscalls/__rt_sigprocmask.S
+++ b/libc/arch-x86_64/syscalls/__rt_sigprocmask.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigprocmask)
     movq    %rcx, %r10
     movl    $__NR_rt_sigprocmask, %eax
diff --git a/libc/arch-x86_64/syscalls/__rt_sigsuspend.S b/libc/arch-x86_64/syscalls/__rt_sigsuspend.S
index 1059f0b..a82b052 100644
--- a/libc/arch-x86_64/syscalls/__rt_sigsuspend.S
+++ b/libc/arch-x86_64/syscalls/__rt_sigsuspend.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigsuspend)
     movl    $__NR_rt_sigsuspend, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__rt_sigtimedwait.S b/libc/arch-x86_64/syscalls/__rt_sigtimedwait.S
index de2e4cb..aceacb2 100644
--- a/libc/arch-x86_64/syscalls/__rt_sigtimedwait.S
+++ b/libc/arch-x86_64/syscalls/__rt_sigtimedwait.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__rt_sigtimedwait)
     movq    %rcx, %r10
     movl    $__NR_rt_sigtimedwait, %eax
diff --git a/libc/arch-x86_64/syscalls/__sched_getaffinity.S b/libc/arch-x86_64/syscalls/__sched_getaffinity.S
index 410954c..fd1f607 100644
--- a/libc/arch-x86_64/syscalls/__sched_getaffinity.S
+++ b/libc/arch-x86_64/syscalls/__sched_getaffinity.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__sched_getaffinity)
     movl    $__NR_sched_getaffinity, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__set_tid_address.S b/libc/arch-x86_64/syscalls/__set_tid_address.S
index c59c8b8..7e5226d 100644
--- a/libc/arch-x86_64/syscalls/__set_tid_address.S
+++ b/libc/arch-x86_64/syscalls/__set_tid_address.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__set_tid_address)
     movl    $__NR_set_tid_address, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__signalfd4.S b/libc/arch-x86_64/syscalls/__signalfd4.S
index 6ddcf5a..d27f63c 100644
--- a/libc/arch-x86_64/syscalls/__signalfd4.S
+++ b/libc/arch-x86_64/syscalls/__signalfd4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__signalfd4)
     movq    %rcx, %r10
     movl    $__NR_signalfd4, %eax
diff --git a/libc/arch-x86_64/syscalls/__socket.S b/libc/arch-x86_64/syscalls/__socket.S
index 209e329..3b573e8 100644
--- a/libc/arch-x86_64/syscalls/__socket.S
+++ b/libc/arch-x86_64/syscalls/__socket.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__socket)
     movl    $__NR_socket, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__timer_create.S b/libc/arch-x86_64/syscalls/__timer_create.S
index 3450d2b..920c935 100644
--- a/libc/arch-x86_64/syscalls/__timer_create.S
+++ b/libc/arch-x86_64/syscalls/__timer_create.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_create)
     movl    $__NR_timer_create, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__timer_delete.S b/libc/arch-x86_64/syscalls/__timer_delete.S
index fd60a16..c76830e 100644
--- a/libc/arch-x86_64/syscalls/__timer_delete.S
+++ b/libc/arch-x86_64/syscalls/__timer_delete.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_delete)
     movl    $__NR_timer_delete, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__timer_getoverrun.S b/libc/arch-x86_64/syscalls/__timer_getoverrun.S
index f5309a3..e35ee93 100644
--- a/libc/arch-x86_64/syscalls/__timer_getoverrun.S
+++ b/libc/arch-x86_64/syscalls/__timer_getoverrun.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_getoverrun)
     movl    $__NR_timer_getoverrun, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__timer_gettime.S b/libc/arch-x86_64/syscalls/__timer_gettime.S
index 7e2bc92..8bb41d9 100644
--- a/libc/arch-x86_64/syscalls/__timer_gettime.S
+++ b/libc/arch-x86_64/syscalls/__timer_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_gettime)
     movl    $__NR_timer_gettime, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/__timer_settime.S b/libc/arch-x86_64/syscalls/__timer_settime.S
index f5401a0..0eace4b 100644
--- a/libc/arch-x86_64/syscalls/__timer_settime.S
+++ b/libc/arch-x86_64/syscalls/__timer_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__timer_settime)
     movq    %rcx, %r10
     movl    $__NR_timer_settime, %eax
diff --git a/libc/arch-x86_64/syscalls/__waitid.S b/libc/arch-x86_64/syscalls/__waitid.S
index 229f20c..47bf7b3 100644
--- a/libc/arch-x86_64/syscalls/__waitid.S
+++ b/libc/arch-x86_64/syscalls/__waitid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__waitid)
     movq    %rcx, %r10
     movl    $__NR_waitid, %eax
diff --git a/libc/arch-x86_64/syscalls/_exit.S b/libc/arch-x86_64/syscalls/_exit.S
index 9c80f00..06465c4 100644
--- a/libc/arch-x86_64/syscalls/_exit.S
+++ b/libc/arch-x86_64/syscalls/_exit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(_exit)
     movl    $__NR_exit_group, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/acct.S b/libc/arch-x86_64/syscalls/acct.S
index 91ecf5b..6bf59e3 100644
--- a/libc/arch-x86_64/syscalls/acct.S
+++ b/libc/arch-x86_64/syscalls/acct.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(acct)
     movl    $__NR_acct, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/bind.S b/libc/arch-x86_64/syscalls/bind.S
index 5d426cb..4300c00 100644
--- a/libc/arch-x86_64/syscalls/bind.S
+++ b/libc/arch-x86_64/syscalls/bind.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(bind)
     movl    $__NR_bind, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/capget.S b/libc/arch-x86_64/syscalls/capget.S
index d3d151e..8ce1846 100644
--- a/libc/arch-x86_64/syscalls/capget.S
+++ b/libc/arch-x86_64/syscalls/capget.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(capget)
     movl    $__NR_capget, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/capset.S b/libc/arch-x86_64/syscalls/capset.S
index 421f156..3aff07c 100644
--- a/libc/arch-x86_64/syscalls/capset.S
+++ b/libc/arch-x86_64/syscalls/capset.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(capset)
     movl    $__NR_capset, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/chdir.S b/libc/arch-x86_64/syscalls/chdir.S
index 7a6f651..f22b40d 100644
--- a/libc/arch-x86_64/syscalls/chdir.S
+++ b/libc/arch-x86_64/syscalls/chdir.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(chdir)
     movl    $__NR_chdir, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/chroot.S b/libc/arch-x86_64/syscalls/chroot.S
index 0f53fd9..eb8a463 100644
--- a/libc/arch-x86_64/syscalls/chroot.S
+++ b/libc/arch-x86_64/syscalls/chroot.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(chroot)
     movl    $__NR_chroot, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/clock_getres.S b/libc/arch-x86_64/syscalls/clock_getres.S
index bad0d78..00b4ed6 100644
--- a/libc/arch-x86_64/syscalls/clock_getres.S
+++ b/libc/arch-x86_64/syscalls/clock_getres.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_getres)
     movl    $__NR_clock_getres, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/clock_nanosleep.S b/libc/arch-x86_64/syscalls/clock_nanosleep.S
index 2ef0d05..8bc87ae 100644
--- a/libc/arch-x86_64/syscalls/clock_nanosleep.S
+++ b/libc/arch-x86_64/syscalls/clock_nanosleep.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_nanosleep)
     movq    %rcx, %r10
     movl    $__NR_clock_nanosleep, %eax
diff --git a/libc/arch-x86_64/syscalls/clock_settime.S b/libc/arch-x86_64/syscalls/clock_settime.S
index 6a3b75b..5225770 100644
--- a/libc/arch-x86_64/syscalls/clock_settime.S
+++ b/libc/arch-x86_64/syscalls/clock_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(clock_settime)
     movl    $__NR_clock_settime, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/close.S b/libc/arch-x86_64/syscalls/close.S
index 41c8403..029d09a 100644
--- a/libc/arch-x86_64/syscalls/close.S
+++ b/libc/arch-x86_64/syscalls/close.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(close)
     movl    $__NR_close, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/delete_module.S b/libc/arch-x86_64/syscalls/delete_module.S
index d3f3862..fc146bb 100644
--- a/libc/arch-x86_64/syscalls/delete_module.S
+++ b/libc/arch-x86_64/syscalls/delete_module.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(delete_module)
     movl    $__NR_delete_module, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/dup.S b/libc/arch-x86_64/syscalls/dup.S
index bf2ca51..53f06b0 100644
--- a/libc/arch-x86_64/syscalls/dup.S
+++ b/libc/arch-x86_64/syscalls/dup.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(dup)
     movl    $__NR_dup, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/dup3.S b/libc/arch-x86_64/syscalls/dup3.S
index f5c929c..fb99941 100644
--- a/libc/arch-x86_64/syscalls/dup3.S
+++ b/libc/arch-x86_64/syscalls/dup3.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(dup3)
     movl    $__NR_dup3, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/epoll_create1.S b/libc/arch-x86_64/syscalls/epoll_create1.S
index 196a3c7..6aa1915 100644
--- a/libc/arch-x86_64/syscalls/epoll_create1.S
+++ b/libc/arch-x86_64/syscalls/epoll_create1.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(epoll_create1)
     movl    $__NR_epoll_create1, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/epoll_ctl.S b/libc/arch-x86_64/syscalls/epoll_ctl.S
index 2a3517c..c9dda01 100644
--- a/libc/arch-x86_64/syscalls/epoll_ctl.S
+++ b/libc/arch-x86_64/syscalls/epoll_ctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(epoll_ctl)
     movq    %rcx, %r10
     movl    $__NR_epoll_ctl, %eax
diff --git a/libc/arch-x86_64/syscalls/eventfd.S b/libc/arch-x86_64/syscalls/eventfd.S
index 3ed4baf..ac7537f 100644
--- a/libc/arch-x86_64/syscalls/eventfd.S
+++ b/libc/arch-x86_64/syscalls/eventfd.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(eventfd)
     movl    $__NR_eventfd2, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/execve.S b/libc/arch-x86_64/syscalls/execve.S
index 1fe29c7..a699303 100644
--- a/libc/arch-x86_64/syscalls/execve.S
+++ b/libc/arch-x86_64/syscalls/execve.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(execve)
     movl    $__NR_execve, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/faccessat.S b/libc/arch-x86_64/syscalls/faccessat.S
index 3ea905c..9426dd5 100644
--- a/libc/arch-x86_64/syscalls/faccessat.S
+++ b/libc/arch-x86_64/syscalls/faccessat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(faccessat)
     movq    %rcx, %r10
     movl    $__NR_faccessat, %eax
diff --git a/libc/arch-x86_64/syscalls/fallocate.S b/libc/arch-x86_64/syscalls/fallocate.S
index abaa303..91a2e65 100644
--- a/libc/arch-x86_64/syscalls/fallocate.S
+++ b/libc/arch-x86_64/syscalls/fallocate.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fallocate)
     movq    %rcx, %r10
     movl    $__NR_fallocate, %eax
diff --git a/libc/arch-x86_64/syscalls/fchdir.S b/libc/arch-x86_64/syscalls/fchdir.S
index b01bb57..01c5030 100644
--- a/libc/arch-x86_64/syscalls/fchdir.S
+++ b/libc/arch-x86_64/syscalls/fchdir.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchdir)
     movl    $__NR_fchdir, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fchmod.S b/libc/arch-x86_64/syscalls/fchmod.S
index 868638f..1f4d02b 100644
--- a/libc/arch-x86_64/syscalls/fchmod.S
+++ b/libc/arch-x86_64/syscalls/fchmod.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchmod)
     movl    $__NR_fchmod, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fchmodat.S b/libc/arch-x86_64/syscalls/fchmodat.S
index e045a13..cee05e3 100644
--- a/libc/arch-x86_64/syscalls/fchmodat.S
+++ b/libc/arch-x86_64/syscalls/fchmodat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchmodat)
     movq    %rcx, %r10
     movl    $__NR_fchmodat, %eax
diff --git a/libc/arch-x86_64/syscalls/fchown.S b/libc/arch-x86_64/syscalls/fchown.S
index 9ba775b..1c43991 100644
--- a/libc/arch-x86_64/syscalls/fchown.S
+++ b/libc/arch-x86_64/syscalls/fchown.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchown)
     movl    $__NR_fchown, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fchownat.S b/libc/arch-x86_64/syscalls/fchownat.S
index 7789d2d..8f77888 100644
--- a/libc/arch-x86_64/syscalls/fchownat.S
+++ b/libc/arch-x86_64/syscalls/fchownat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchownat)
     movq    %rcx, %r10
     movl    $__NR_fchownat, %eax
diff --git a/libc/arch-x86_64/syscalls/fcntl.S b/libc/arch-x86_64/syscalls/fcntl.S
index a20d938..d415467 100644
--- a/libc/arch-x86_64/syscalls/fcntl.S
+++ b/libc/arch-x86_64/syscalls/fcntl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fcntl)
     movl    $__NR_fcntl, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fdatasync.S b/libc/arch-x86_64/syscalls/fdatasync.S
index 5ea8ebd..8ec4193 100644
--- a/libc/arch-x86_64/syscalls/fdatasync.S
+++ b/libc/arch-x86_64/syscalls/fdatasync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fdatasync)
     movl    $__NR_fdatasync, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fgetxattr.S b/libc/arch-x86_64/syscalls/fgetxattr.S
index 096c30f..9aacdbd 100644
--- a/libc/arch-x86_64/syscalls/fgetxattr.S
+++ b/libc/arch-x86_64/syscalls/fgetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fgetxattr)
     movq    %rcx, %r10
     movl    $__NR_fgetxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/flistxattr.S b/libc/arch-x86_64/syscalls/flistxattr.S
index e0e5b8b..53c58d0 100644
--- a/libc/arch-x86_64/syscalls/flistxattr.S
+++ b/libc/arch-x86_64/syscalls/flistxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(flistxattr)
     movl    $__NR_flistxattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/flock.S b/libc/arch-x86_64/syscalls/flock.S
index 981d86e..fe57b47 100644
--- a/libc/arch-x86_64/syscalls/flock.S
+++ b/libc/arch-x86_64/syscalls/flock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(flock)
     movl    $__NR_flock, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fremovexattr.S b/libc/arch-x86_64/syscalls/fremovexattr.S
index 655bdef..c37cc93 100644
--- a/libc/arch-x86_64/syscalls/fremovexattr.S
+++ b/libc/arch-x86_64/syscalls/fremovexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fremovexattr)
     movl    $__NR_fremovexattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fsetxattr.S b/libc/arch-x86_64/syscalls/fsetxattr.S
index fa2bddc..cc3d7b7 100644
--- a/libc/arch-x86_64/syscalls/fsetxattr.S
+++ b/libc/arch-x86_64/syscalls/fsetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fsetxattr)
     movq    %rcx, %r10
     movl    $__NR_fsetxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/fstat64.S b/libc/arch-x86_64/syscalls/fstat64.S
index 9e7aa2d..dbc6760 100644
--- a/libc/arch-x86_64/syscalls/fstat64.S
+++ b/libc/arch-x86_64/syscalls/fstat64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fstat64)
     movl    $__NR_fstat, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fstatat64.S b/libc/arch-x86_64/syscalls/fstatat64.S
index 5418cd0..28b91fa 100644
--- a/libc/arch-x86_64/syscalls/fstatat64.S
+++ b/libc/arch-x86_64/syscalls/fstatat64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fstatat64)
     movq    %rcx, %r10
     movl    $__NR_newfstatat, %eax
diff --git a/libc/arch-x86_64/syscalls/fstatfs64.S b/libc/arch-x86_64/syscalls/fstatfs64.S
index ee2daa2..4b12afb 100644
--- a/libc/arch-x86_64/syscalls/fstatfs64.S
+++ b/libc/arch-x86_64/syscalls/fstatfs64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fstatfs64)
     movl    $__NR_fstatfs, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/fsync.S b/libc/arch-x86_64/syscalls/fsync.S
index 12eabd3..820502e 100644
--- a/libc/arch-x86_64/syscalls/fsync.S
+++ b/libc/arch-x86_64/syscalls/fsync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fsync)
     movl    $__NR_fsync, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/ftruncate.S b/libc/arch-x86_64/syscalls/ftruncate.S
index 11161a7..0b14403 100644
--- a/libc/arch-x86_64/syscalls/ftruncate.S
+++ b/libc/arch-x86_64/syscalls/ftruncate.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(ftruncate)
     movl    $__NR_ftruncate, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getegid.S b/libc/arch-x86_64/syscalls/getegid.S
index 6f9c2a8..155d37b 100644
--- a/libc/arch-x86_64/syscalls/getegid.S
+++ b/libc/arch-x86_64/syscalls/getegid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getegid)
     movl    $__NR_getegid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/geteuid.S b/libc/arch-x86_64/syscalls/geteuid.S
index 88000ef..9ffa3cd 100644
--- a/libc/arch-x86_64/syscalls/geteuid.S
+++ b/libc/arch-x86_64/syscalls/geteuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(geteuid)
     movl    $__NR_geteuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getgid.S b/libc/arch-x86_64/syscalls/getgid.S
index 8f8eaa6..d9c9da9 100644
--- a/libc/arch-x86_64/syscalls/getgid.S
+++ b/libc/arch-x86_64/syscalls/getgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getgid)
     movl    $__NR_getgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getgroups.S b/libc/arch-x86_64/syscalls/getgroups.S
index 5358a3e..9f0701a 100644
--- a/libc/arch-x86_64/syscalls/getgroups.S
+++ b/libc/arch-x86_64/syscalls/getgroups.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getgroups)
     movl    $__NR_getgroups, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getitimer.S b/libc/arch-x86_64/syscalls/getitimer.S
index b6a6e8e..2d76430 100644
--- a/libc/arch-x86_64/syscalls/getitimer.S
+++ b/libc/arch-x86_64/syscalls/getitimer.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getitimer)
     movl    $__NR_getitimer, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getpeername.S b/libc/arch-x86_64/syscalls/getpeername.S
index 98e06fb..b6de183 100644
--- a/libc/arch-x86_64/syscalls/getpeername.S
+++ b/libc/arch-x86_64/syscalls/getpeername.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getpeername)
     movl    $__NR_getpeername, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getpgid.S b/libc/arch-x86_64/syscalls/getpgid.S
index 158f14d..e321b66 100644
--- a/libc/arch-x86_64/syscalls/getpgid.S
+++ b/libc/arch-x86_64/syscalls/getpgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getpgid)
     movl    $__NR_getpgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getppid.S b/libc/arch-x86_64/syscalls/getppid.S
index e4853e0..4a238ad 100644
--- a/libc/arch-x86_64/syscalls/getppid.S
+++ b/libc/arch-x86_64/syscalls/getppid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getppid)
     movl    $__NR_getppid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getresgid.S b/libc/arch-x86_64/syscalls/getresgid.S
index d65fb13..4727d29 100644
--- a/libc/arch-x86_64/syscalls/getresgid.S
+++ b/libc/arch-x86_64/syscalls/getresgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getresgid)
     movl    $__NR_getresgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getresuid.S b/libc/arch-x86_64/syscalls/getresuid.S
index 80d85c6..1098d56 100644
--- a/libc/arch-x86_64/syscalls/getresuid.S
+++ b/libc/arch-x86_64/syscalls/getresuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getresuid)
     movl    $__NR_getresuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getrlimit.S b/libc/arch-x86_64/syscalls/getrlimit.S
index ea0ca7d..60e5881 100644
--- a/libc/arch-x86_64/syscalls/getrlimit.S
+++ b/libc/arch-x86_64/syscalls/getrlimit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getrlimit)
     movl    $__NR_getrlimit, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getrusage.S b/libc/arch-x86_64/syscalls/getrusage.S
index 7a60738..0eb0176 100644
--- a/libc/arch-x86_64/syscalls/getrusage.S
+++ b/libc/arch-x86_64/syscalls/getrusage.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getrusage)
     movl    $__NR_getrusage, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getsid.S b/libc/arch-x86_64/syscalls/getsid.S
index 75e3fad..2543b10 100644
--- a/libc/arch-x86_64/syscalls/getsid.S
+++ b/libc/arch-x86_64/syscalls/getsid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsid)
     movl    $__NR_getsid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getsockname.S b/libc/arch-x86_64/syscalls/getsockname.S
index 3c7c2f8..17cd5ea 100644
--- a/libc/arch-x86_64/syscalls/getsockname.S
+++ b/libc/arch-x86_64/syscalls/getsockname.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsockname)
     movl    $__NR_getsockname, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getsockopt.S b/libc/arch-x86_64/syscalls/getsockopt.S
index 725757c..988a2cb 100644
--- a/libc/arch-x86_64/syscalls/getsockopt.S
+++ b/libc/arch-x86_64/syscalls/getsockopt.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getsockopt)
     movq    %rcx, %r10
     movl    $__NR_getsockopt, %eax
diff --git a/libc/arch-x86_64/syscalls/getuid.S b/libc/arch-x86_64/syscalls/getuid.S
index d7306e1..9b7a1d9 100644
--- a/libc/arch-x86_64/syscalls/getuid.S
+++ b/libc/arch-x86_64/syscalls/getuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getuid)
     movl    $__NR_getuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/getxattr.S b/libc/arch-x86_64/syscalls/getxattr.S
index 7c66b0e..4d6aecf 100644
--- a/libc/arch-x86_64/syscalls/getxattr.S
+++ b/libc/arch-x86_64/syscalls/getxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(getxattr)
     movq    %rcx, %r10
     movl    $__NR_getxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/init_module.S b/libc/arch-x86_64/syscalls/init_module.S
index 187f5a2..2c51414 100644
--- a/libc/arch-x86_64/syscalls/init_module.S
+++ b/libc/arch-x86_64/syscalls/init_module.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(init_module)
     movl    $__NR_init_module, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/inotify_add_watch.S b/libc/arch-x86_64/syscalls/inotify_add_watch.S
index 47e15ab..da5aa36 100644
--- a/libc/arch-x86_64/syscalls/inotify_add_watch.S
+++ b/libc/arch-x86_64/syscalls/inotify_add_watch.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_add_watch)
     movl    $__NR_inotify_add_watch, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/inotify_init1.S b/libc/arch-x86_64/syscalls/inotify_init1.S
index 160b0d5..46e5014 100644
--- a/libc/arch-x86_64/syscalls/inotify_init1.S
+++ b/libc/arch-x86_64/syscalls/inotify_init1.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_init1)
     movl    $__NR_inotify_init1, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/inotify_rm_watch.S b/libc/arch-x86_64/syscalls/inotify_rm_watch.S
index 4c5874e..5920c9d 100644
--- a/libc/arch-x86_64/syscalls/inotify_rm_watch.S
+++ b/libc/arch-x86_64/syscalls/inotify_rm_watch.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(inotify_rm_watch)
     movl    $__NR_inotify_rm_watch, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/kill.S b/libc/arch-x86_64/syscalls/kill.S
index f234585..dff2da6 100644
--- a/libc/arch-x86_64/syscalls/kill.S
+++ b/libc/arch-x86_64/syscalls/kill.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(kill)
     movl    $__NR_kill, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/klogctl.S b/libc/arch-x86_64/syscalls/klogctl.S
index 057b066..8560d28 100644
--- a/libc/arch-x86_64/syscalls/klogctl.S
+++ b/libc/arch-x86_64/syscalls/klogctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(klogctl)
     movl    $__NR_syslog, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/lgetxattr.S b/libc/arch-x86_64/syscalls/lgetxattr.S
index 525ee3b..b4bc204 100644
--- a/libc/arch-x86_64/syscalls/lgetxattr.S
+++ b/libc/arch-x86_64/syscalls/lgetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lgetxattr)
     movq    %rcx, %r10
     movl    $__NR_lgetxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/linkat.S b/libc/arch-x86_64/syscalls/linkat.S
index 815af86..509b579 100644
--- a/libc/arch-x86_64/syscalls/linkat.S
+++ b/libc/arch-x86_64/syscalls/linkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(linkat)
     movq    %rcx, %r10
     movl    $__NR_linkat, %eax
diff --git a/libc/arch-x86_64/syscalls/listen.S b/libc/arch-x86_64/syscalls/listen.S
index d3d7103..6bd46a5 100644
--- a/libc/arch-x86_64/syscalls/listen.S
+++ b/libc/arch-x86_64/syscalls/listen.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(listen)
     movl    $__NR_listen, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/listxattr.S b/libc/arch-x86_64/syscalls/listxattr.S
index 89fd63c..102518f 100644
--- a/libc/arch-x86_64/syscalls/listxattr.S
+++ b/libc/arch-x86_64/syscalls/listxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(listxattr)
     movl    $__NR_listxattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/llistxattr.S b/libc/arch-x86_64/syscalls/llistxattr.S
index cfff2e7..74d58a8 100644
--- a/libc/arch-x86_64/syscalls/llistxattr.S
+++ b/libc/arch-x86_64/syscalls/llistxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(llistxattr)
     movl    $__NR_llistxattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/lremovexattr.S b/libc/arch-x86_64/syscalls/lremovexattr.S
index 0b6994a..2566e33 100644
--- a/libc/arch-x86_64/syscalls/lremovexattr.S
+++ b/libc/arch-x86_64/syscalls/lremovexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lremovexattr)
     movl    $__NR_lremovexattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/lseek.S b/libc/arch-x86_64/syscalls/lseek.S
index b2e8c16..93e5f0c 100644
--- a/libc/arch-x86_64/syscalls/lseek.S
+++ b/libc/arch-x86_64/syscalls/lseek.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lseek)
     movl    $__NR_lseek, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/lsetxattr.S b/libc/arch-x86_64/syscalls/lsetxattr.S
index fdaf98a..905bd3b 100644
--- a/libc/arch-x86_64/syscalls/lsetxattr.S
+++ b/libc/arch-x86_64/syscalls/lsetxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(lsetxattr)
     movq    %rcx, %r10
     movl    $__NR_lsetxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/madvise.S b/libc/arch-x86_64/syscalls/madvise.S
index 3f567fd..c565ca3 100644
--- a/libc/arch-x86_64/syscalls/madvise.S
+++ b/libc/arch-x86_64/syscalls/madvise.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(madvise)
     movl    $__NR_madvise, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mincore.S b/libc/arch-x86_64/syscalls/mincore.S
index e6b2521..f8acdeb 100644
--- a/libc/arch-x86_64/syscalls/mincore.S
+++ b/libc/arch-x86_64/syscalls/mincore.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mincore)
     movl    $__NR_mincore, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mkdirat.S b/libc/arch-x86_64/syscalls/mkdirat.S
index abba2d5..b554d12 100644
--- a/libc/arch-x86_64/syscalls/mkdirat.S
+++ b/libc/arch-x86_64/syscalls/mkdirat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mkdirat)
     movl    $__NR_mkdirat, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mknodat.S b/libc/arch-x86_64/syscalls/mknodat.S
index d3d78c9..dd6496a 100644
--- a/libc/arch-x86_64/syscalls/mknodat.S
+++ b/libc/arch-x86_64/syscalls/mknodat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mknodat)
     movq    %rcx, %r10
     movl    $__NR_mknodat, %eax
diff --git a/libc/arch-x86_64/syscalls/mlock.S b/libc/arch-x86_64/syscalls/mlock.S
index 0c69eb7..78389e2 100644
--- a/libc/arch-x86_64/syscalls/mlock.S
+++ b/libc/arch-x86_64/syscalls/mlock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mlock)
     movl    $__NR_mlock, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mlockall.S b/libc/arch-x86_64/syscalls/mlockall.S
index 89ba9b6..3ac878a 100644
--- a/libc/arch-x86_64/syscalls/mlockall.S
+++ b/libc/arch-x86_64/syscalls/mlockall.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mlockall)
     movl    $__NR_mlockall, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mmap.S b/libc/arch-x86_64/syscalls/mmap.S
index 7b9f6e0..44189a9 100644
--- a/libc/arch-x86_64/syscalls/mmap.S
+++ b/libc/arch-x86_64/syscalls/mmap.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mmap)
     movq    %rcx, %r10
     movl    $__NR_mmap, %eax
diff --git a/libc/arch-x86_64/syscalls/mount.S b/libc/arch-x86_64/syscalls/mount.S
index 04534c9..369e8df 100644
--- a/libc/arch-x86_64/syscalls/mount.S
+++ b/libc/arch-x86_64/syscalls/mount.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mount)
     movq    %rcx, %r10
     movl    $__NR_mount, %eax
diff --git a/libc/arch-x86_64/syscalls/mprotect.S b/libc/arch-x86_64/syscalls/mprotect.S
index d849bb1..44888da 100644
--- a/libc/arch-x86_64/syscalls/mprotect.S
+++ b/libc/arch-x86_64/syscalls/mprotect.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mprotect)
     movl    $__NR_mprotect, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/mremap.S b/libc/arch-x86_64/syscalls/mremap.S
index 8af367e..74a05e2 100644
--- a/libc/arch-x86_64/syscalls/mremap.S
+++ b/libc/arch-x86_64/syscalls/mremap.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(mremap)
     movq    %rcx, %r10
     movl    $__NR_mremap, %eax
diff --git a/libc/arch-x86_64/syscalls/msync.S b/libc/arch-x86_64/syscalls/msync.S
index c0ff0f9..1d0e785 100644
--- a/libc/arch-x86_64/syscalls/msync.S
+++ b/libc/arch-x86_64/syscalls/msync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(msync)
     movl    $__NR_msync, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/munlock.S b/libc/arch-x86_64/syscalls/munlock.S
index d669f54..17e368b 100644
--- a/libc/arch-x86_64/syscalls/munlock.S
+++ b/libc/arch-x86_64/syscalls/munlock.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munlock)
     movl    $__NR_munlock, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/munlockall.S b/libc/arch-x86_64/syscalls/munlockall.S
index b7a9abc..6bb7aa6 100644
--- a/libc/arch-x86_64/syscalls/munlockall.S
+++ b/libc/arch-x86_64/syscalls/munlockall.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munlockall)
     movl    $__NR_munlockall, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/munmap.S b/libc/arch-x86_64/syscalls/munmap.S
index 4360bd0..f423a66 100644
--- a/libc/arch-x86_64/syscalls/munmap.S
+++ b/libc/arch-x86_64/syscalls/munmap.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(munmap)
     movl    $__NR_munmap, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/nanosleep.S b/libc/arch-x86_64/syscalls/nanosleep.S
index 2eced5b..caa1ae6 100644
--- a/libc/arch-x86_64/syscalls/nanosleep.S
+++ b/libc/arch-x86_64/syscalls/nanosleep.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(nanosleep)
     movl    $__NR_nanosleep, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/personality.S b/libc/arch-x86_64/syscalls/personality.S
index 17ad7ee..a742dbf 100644
--- a/libc/arch-x86_64/syscalls/personality.S
+++ b/libc/arch-x86_64/syscalls/personality.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(personality)
     movl    $__NR_personality, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/pipe2.S b/libc/arch-x86_64/syscalls/pipe2.S
index 83eb0a6..e34ca69 100644
--- a/libc/arch-x86_64/syscalls/pipe2.S
+++ b/libc/arch-x86_64/syscalls/pipe2.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pipe2)
     movl    $__NR_pipe2, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/prctl.S b/libc/arch-x86_64/syscalls/prctl.S
index c79220d..b4cdaa5 100644
--- a/libc/arch-x86_64/syscalls/prctl.S
+++ b/libc/arch-x86_64/syscalls/prctl.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(prctl)
     movq    %rcx, %r10
     movl    $__NR_prctl, %eax
diff --git a/libc/arch-x86_64/syscalls/pread64.S b/libc/arch-x86_64/syscalls/pread64.S
index 1c4dc68..1d042ef 100644
--- a/libc/arch-x86_64/syscalls/pread64.S
+++ b/libc/arch-x86_64/syscalls/pread64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pread64)
     movq    %rcx, %r10
     movl    $__NR_pread64, %eax
diff --git a/libc/arch-x86_64/syscalls/prlimit64.S b/libc/arch-x86_64/syscalls/prlimit64.S
index 823feba..52151a8 100644
--- a/libc/arch-x86_64/syscalls/prlimit64.S
+++ b/libc/arch-x86_64/syscalls/prlimit64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(prlimit64)
     movq    %rcx, %r10
     movl    $__NR_prlimit64, %eax
diff --git a/libc/arch-x86_64/syscalls/pwrite64.S b/libc/arch-x86_64/syscalls/pwrite64.S
index 13bcb58..2fb0f16 100644
--- a/libc/arch-x86_64/syscalls/pwrite64.S
+++ b/libc/arch-x86_64/syscalls/pwrite64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(pwrite64)
     movq    %rcx, %r10
     movl    $__NR_pwrite64, %eax
diff --git a/libc/arch-x86_64/syscalls/read.S b/libc/arch-x86_64/syscalls/read.S
index 400c87a..3f2862e 100644
--- a/libc/arch-x86_64/syscalls/read.S
+++ b/libc/arch-x86_64/syscalls/read.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(read)
     movl    $__NR_read, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/readahead.S b/libc/arch-x86_64/syscalls/readahead.S
index 2a2978b..df3aba1 100644
--- a/libc/arch-x86_64/syscalls/readahead.S
+++ b/libc/arch-x86_64/syscalls/readahead.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readahead)
     movl    $__NR_readahead, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/readlinkat.S b/libc/arch-x86_64/syscalls/readlinkat.S
index 51d1f0c..554b8b6 100644
--- a/libc/arch-x86_64/syscalls/readlinkat.S
+++ b/libc/arch-x86_64/syscalls/readlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readlinkat)
     movq    %rcx, %r10
     movl    $__NR_readlinkat, %eax
diff --git a/libc/arch-x86_64/syscalls/readv.S b/libc/arch-x86_64/syscalls/readv.S
index 4199751..75d04e9 100644
--- a/libc/arch-x86_64/syscalls/readv.S
+++ b/libc/arch-x86_64/syscalls/readv.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(readv)
     movl    $__NR_readv, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/recvfrom.S b/libc/arch-x86_64/syscalls/recvfrom.S
index 61ca1b2..4ee5631 100644
--- a/libc/arch-x86_64/syscalls/recvfrom.S
+++ b/libc/arch-x86_64/syscalls/recvfrom.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvfrom)
     movq    %rcx, %r10
     movl    $__NR_recvfrom, %eax
diff --git a/libc/arch-x86_64/syscalls/recvmmsg.S b/libc/arch-x86_64/syscalls/recvmmsg.S
index ce14ba5..3279325 100644
--- a/libc/arch-x86_64/syscalls/recvmmsg.S
+++ b/libc/arch-x86_64/syscalls/recvmmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvmmsg)
     movq    %rcx, %r10
     movl    $__NR_recvmmsg, %eax
diff --git a/libc/arch-x86_64/syscalls/recvmsg.S b/libc/arch-x86_64/syscalls/recvmsg.S
index 8655d07..7c186fd 100644
--- a/libc/arch-x86_64/syscalls/recvmsg.S
+++ b/libc/arch-x86_64/syscalls/recvmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(recvmsg)
     movl    $__NR_recvmsg, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/removexattr.S b/libc/arch-x86_64/syscalls/removexattr.S
index 9736463..9091647 100644
--- a/libc/arch-x86_64/syscalls/removexattr.S
+++ b/libc/arch-x86_64/syscalls/removexattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(removexattr)
     movl    $__NR_removexattr, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/renameat.S b/libc/arch-x86_64/syscalls/renameat.S
index 0be2ef9..7258712 100644
--- a/libc/arch-x86_64/syscalls/renameat.S
+++ b/libc/arch-x86_64/syscalls/renameat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(renameat)
     movq    %rcx, %r10
     movl    $__NR_renameat, %eax
diff --git a/libc/arch-x86_64/syscalls/sched_get_priority_max.S b/libc/arch-x86_64/syscalls/sched_get_priority_max.S
index 0f92739..604d6c8 100644
--- a/libc/arch-x86_64/syscalls/sched_get_priority_max.S
+++ b/libc/arch-x86_64/syscalls/sched_get_priority_max.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_get_priority_max)
     movl    $__NR_sched_get_priority_max, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_get_priority_min.S b/libc/arch-x86_64/syscalls/sched_get_priority_min.S
index 8450e9d..eaeb765 100644
--- a/libc/arch-x86_64/syscalls/sched_get_priority_min.S
+++ b/libc/arch-x86_64/syscalls/sched_get_priority_min.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_get_priority_min)
     movl    $__NR_sched_get_priority_min, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_getparam.S b/libc/arch-x86_64/syscalls/sched_getparam.S
index a784640..e269c7d 100644
--- a/libc/arch-x86_64/syscalls/sched_getparam.S
+++ b/libc/arch-x86_64/syscalls/sched_getparam.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_getparam)
     movl    $__NR_sched_getparam, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_getscheduler.S b/libc/arch-x86_64/syscalls/sched_getscheduler.S
index 090b322..0cf3b54 100644
--- a/libc/arch-x86_64/syscalls/sched_getscheduler.S
+++ b/libc/arch-x86_64/syscalls/sched_getscheduler.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_getscheduler)
     movl    $__NR_sched_getscheduler, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_rr_get_interval.S b/libc/arch-x86_64/syscalls/sched_rr_get_interval.S
index 0977f2e..662a28c 100644
--- a/libc/arch-x86_64/syscalls/sched_rr_get_interval.S
+++ b/libc/arch-x86_64/syscalls/sched_rr_get_interval.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_rr_get_interval)
     movl    $__NR_sched_rr_get_interval, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_setaffinity.S b/libc/arch-x86_64/syscalls/sched_setaffinity.S
index af8e7a2..79b43fd 100644
--- a/libc/arch-x86_64/syscalls/sched_setaffinity.S
+++ b/libc/arch-x86_64/syscalls/sched_setaffinity.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setaffinity)
     movl    $__NR_sched_setaffinity, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_setparam.S b/libc/arch-x86_64/syscalls/sched_setparam.S
index 2964607..871b492 100644
--- a/libc/arch-x86_64/syscalls/sched_setparam.S
+++ b/libc/arch-x86_64/syscalls/sched_setparam.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setparam)
     movl    $__NR_sched_setparam, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_setscheduler.S b/libc/arch-x86_64/syscalls/sched_setscheduler.S
index 333d1b8..0dcb47d 100644
--- a/libc/arch-x86_64/syscalls/sched_setscheduler.S
+++ b/libc/arch-x86_64/syscalls/sched_setscheduler.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_setscheduler)
     movl    $__NR_sched_setscheduler, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sched_yield.S b/libc/arch-x86_64/syscalls/sched_yield.S
index a972154..12de511 100644
--- a/libc/arch-x86_64/syscalls/sched_yield.S
+++ b/libc/arch-x86_64/syscalls/sched_yield.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sched_yield)
     movl    $__NR_sched_yield, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sendfile.S b/libc/arch-x86_64/syscalls/sendfile.S
index c1b6497..0255bf2 100644
--- a/libc/arch-x86_64/syscalls/sendfile.S
+++ b/libc/arch-x86_64/syscalls/sendfile.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendfile)
     movq    %rcx, %r10
     movl    $__NR_sendfile, %eax
diff --git a/libc/arch-x86_64/syscalls/sendmmsg.S b/libc/arch-x86_64/syscalls/sendmmsg.S
index 940c0b6..47b2e3a 100644
--- a/libc/arch-x86_64/syscalls/sendmmsg.S
+++ b/libc/arch-x86_64/syscalls/sendmmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendmmsg)
     movq    %rcx, %r10
     movl    $__NR_sendmmsg, %eax
diff --git a/libc/arch-x86_64/syscalls/sendmsg.S b/libc/arch-x86_64/syscalls/sendmsg.S
index 6d94bb6..e9eecf6 100644
--- a/libc/arch-x86_64/syscalls/sendmsg.S
+++ b/libc/arch-x86_64/syscalls/sendmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendmsg)
     movl    $__NR_sendmsg, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sendto.S b/libc/arch-x86_64/syscalls/sendto.S
index bfe4636..f8cc149 100644
--- a/libc/arch-x86_64/syscalls/sendto.S
+++ b/libc/arch-x86_64/syscalls/sendto.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendto)
     movq    %rcx, %r10
     movl    $__NR_sendto, %eax
diff --git a/libc/arch-x86_64/syscalls/setfsgid.S b/libc/arch-x86_64/syscalls/setfsgid.S
index e9f50b8..bfc9c5d 100644
--- a/libc/arch-x86_64/syscalls/setfsgid.S
+++ b/libc/arch-x86_64/syscalls/setfsgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setfsgid)
     movl    $__NR_setfsgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setfsuid.S b/libc/arch-x86_64/syscalls/setfsuid.S
index cfdb86c..2540a36 100644
--- a/libc/arch-x86_64/syscalls/setfsuid.S
+++ b/libc/arch-x86_64/syscalls/setfsuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setfsuid)
     movl    $__NR_setfsuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setgid.S b/libc/arch-x86_64/syscalls/setgid.S
index ef4fb31..8f9ce53 100644
--- a/libc/arch-x86_64/syscalls/setgid.S
+++ b/libc/arch-x86_64/syscalls/setgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setgid)
     movl    $__NR_setgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setgroups.S b/libc/arch-x86_64/syscalls/setgroups.S
index 65e6180..81023ab 100644
--- a/libc/arch-x86_64/syscalls/setgroups.S
+++ b/libc/arch-x86_64/syscalls/setgroups.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setgroups)
     movl    $__NR_setgroups, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setitimer.S b/libc/arch-x86_64/syscalls/setitimer.S
index bee4996..6882564 100644
--- a/libc/arch-x86_64/syscalls/setitimer.S
+++ b/libc/arch-x86_64/syscalls/setitimer.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setitimer)
     movl    $__NR_setitimer, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setns.S b/libc/arch-x86_64/syscalls/setns.S
index 521769b..15dc51c 100644
--- a/libc/arch-x86_64/syscalls/setns.S
+++ b/libc/arch-x86_64/syscalls/setns.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setns)
     movl    $__NR_setns, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setpgid.S b/libc/arch-x86_64/syscalls/setpgid.S
index 348612b..0cbb9a3 100644
--- a/libc/arch-x86_64/syscalls/setpgid.S
+++ b/libc/arch-x86_64/syscalls/setpgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setpgid)
     movl    $__NR_setpgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setpriority.S b/libc/arch-x86_64/syscalls/setpriority.S
index 0940368..e2ee775 100644
--- a/libc/arch-x86_64/syscalls/setpriority.S
+++ b/libc/arch-x86_64/syscalls/setpriority.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setpriority)
     movl    $__NR_setpriority, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setregid.S b/libc/arch-x86_64/syscalls/setregid.S
index 0338ecf..1d53e4c 100644
--- a/libc/arch-x86_64/syscalls/setregid.S
+++ b/libc/arch-x86_64/syscalls/setregid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setregid)
     movl    $__NR_setregid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setresgid.S b/libc/arch-x86_64/syscalls/setresgid.S
index 10e1244..7663cc6 100644
--- a/libc/arch-x86_64/syscalls/setresgid.S
+++ b/libc/arch-x86_64/syscalls/setresgid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setresgid)
     movl    $__NR_setresgid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setresuid.S b/libc/arch-x86_64/syscalls/setresuid.S
index 229b11b..96e691f 100644
--- a/libc/arch-x86_64/syscalls/setresuid.S
+++ b/libc/arch-x86_64/syscalls/setresuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setresuid)
     movl    $__NR_setresuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setreuid.S b/libc/arch-x86_64/syscalls/setreuid.S
index e96e2d3..9ee7208 100644
--- a/libc/arch-x86_64/syscalls/setreuid.S
+++ b/libc/arch-x86_64/syscalls/setreuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setreuid)
     movl    $__NR_setreuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setrlimit.S b/libc/arch-x86_64/syscalls/setrlimit.S
index 662587d..393a5c1 100644
--- a/libc/arch-x86_64/syscalls/setrlimit.S
+++ b/libc/arch-x86_64/syscalls/setrlimit.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setrlimit)
     movl    $__NR_setrlimit, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setsid.S b/libc/arch-x86_64/syscalls/setsid.S
index 293ecf5..bed06c9 100644
--- a/libc/arch-x86_64/syscalls/setsid.S
+++ b/libc/arch-x86_64/syscalls/setsid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setsid)
     movl    $__NR_setsid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setsockopt.S b/libc/arch-x86_64/syscalls/setsockopt.S
index aee6613..3c12cd6 100644
--- a/libc/arch-x86_64/syscalls/setsockopt.S
+++ b/libc/arch-x86_64/syscalls/setsockopt.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setsockopt)
     movq    %rcx, %r10
     movl    $__NR_setsockopt, %eax
diff --git a/libc/arch-x86_64/syscalls/settimeofday.S b/libc/arch-x86_64/syscalls/settimeofday.S
index 0d00c89..317946a 100644
--- a/libc/arch-x86_64/syscalls/settimeofday.S
+++ b/libc/arch-x86_64/syscalls/settimeofday.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(settimeofday)
     movl    $__NR_settimeofday, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setuid.S b/libc/arch-x86_64/syscalls/setuid.S
index 19e2a10..8da7d86 100644
--- a/libc/arch-x86_64/syscalls/setuid.S
+++ b/libc/arch-x86_64/syscalls/setuid.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setuid)
     movl    $__NR_setuid, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/setxattr.S b/libc/arch-x86_64/syscalls/setxattr.S
index 3e4d50b..2abaa76 100644
--- a/libc/arch-x86_64/syscalls/setxattr.S
+++ b/libc/arch-x86_64/syscalls/setxattr.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(setxattr)
     movq    %rcx, %r10
     movl    $__NR_setxattr, %eax
diff --git a/libc/arch-x86_64/syscalls/shutdown.S b/libc/arch-x86_64/syscalls/shutdown.S
index 346be33..b5840d7 100644
--- a/libc/arch-x86_64/syscalls/shutdown.S
+++ b/libc/arch-x86_64/syscalls/shutdown.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(shutdown)
     movl    $__NR_shutdown, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sigaltstack.S b/libc/arch-x86_64/syscalls/sigaltstack.S
index 271fafc..2dd6aa4 100644
--- a/libc/arch-x86_64/syscalls/sigaltstack.S
+++ b/libc/arch-x86_64/syscalls/sigaltstack.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sigaltstack)
     movl    $__NR_sigaltstack, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/socketpair.S b/libc/arch-x86_64/syscalls/socketpair.S
index 5466dc9..cb32a8a 100644
--- a/libc/arch-x86_64/syscalls/socketpair.S
+++ b/libc/arch-x86_64/syscalls/socketpair.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(socketpair)
     movq    %rcx, %r10
     movl    $__NR_socketpair, %eax
diff --git a/libc/arch-x86_64/syscalls/splice.S b/libc/arch-x86_64/syscalls/splice.S
index 3c245a5..351e1c7 100644
--- a/libc/arch-x86_64/syscalls/splice.S
+++ b/libc/arch-x86_64/syscalls/splice.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(splice)
     movq    %rcx, %r10
     movl    $__NR_splice, %eax
diff --git a/libc/arch-x86_64/syscalls/statfs64.S b/libc/arch-x86_64/syscalls/statfs64.S
index 6a2637c..26c3d53 100644
--- a/libc/arch-x86_64/syscalls/statfs64.S
+++ b/libc/arch-x86_64/syscalls/statfs64.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(statfs64)
     movl    $__NR_statfs, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/swapoff.S b/libc/arch-x86_64/syscalls/swapoff.S
index 7e55758..1bf331c 100644
--- a/libc/arch-x86_64/syscalls/swapoff.S
+++ b/libc/arch-x86_64/syscalls/swapoff.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(swapoff)
     movl    $__NR_swapoff, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/swapon.S b/libc/arch-x86_64/syscalls/swapon.S
index d2f5f66..7405ccb 100644
--- a/libc/arch-x86_64/syscalls/swapon.S
+++ b/libc/arch-x86_64/syscalls/swapon.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(swapon)
     movl    $__NR_swapon, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/symlinkat.S b/libc/arch-x86_64/syscalls/symlinkat.S
index 5bbf1cb..bea2da8 100644
--- a/libc/arch-x86_64/syscalls/symlinkat.S
+++ b/libc/arch-x86_64/syscalls/symlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(symlinkat)
     movl    $__NR_symlinkat, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sync.S b/libc/arch-x86_64/syscalls/sync.S
index 9911715..97aa427 100644
--- a/libc/arch-x86_64/syscalls/sync.S
+++ b/libc/arch-x86_64/syscalls/sync.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sync)
     movl    $__NR_sync, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/sysinfo.S b/libc/arch-x86_64/syscalls/sysinfo.S
index 104bb2c..de8fb8f 100644
--- a/libc/arch-x86_64/syscalls/sysinfo.S
+++ b/libc/arch-x86_64/syscalls/sysinfo.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sysinfo)
     movl    $__NR_sysinfo, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/tee.S b/libc/arch-x86_64/syscalls/tee.S
index ad5698c..41e2370 100644
--- a/libc/arch-x86_64/syscalls/tee.S
+++ b/libc/arch-x86_64/syscalls/tee.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(tee)
     movq    %rcx, %r10
     movl    $__NR_tee, %eax
diff --git a/libc/arch-x86_64/syscalls/tgkill.S b/libc/arch-x86_64/syscalls/tgkill.S
index e3b9972..00b2b42 100644
--- a/libc/arch-x86_64/syscalls/tgkill.S
+++ b/libc/arch-x86_64/syscalls/tgkill.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(tgkill)
     movl    $__NR_tgkill, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/timerfd_create.S b/libc/arch-x86_64/syscalls/timerfd_create.S
index 3f1b23a..eef3208 100644
--- a/libc/arch-x86_64/syscalls/timerfd_create.S
+++ b/libc/arch-x86_64/syscalls/timerfd_create.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_create)
     movl    $__NR_timerfd_create, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/timerfd_gettime.S b/libc/arch-x86_64/syscalls/timerfd_gettime.S
index b1017ad..9f11c5a 100644
--- a/libc/arch-x86_64/syscalls/timerfd_gettime.S
+++ b/libc/arch-x86_64/syscalls/timerfd_gettime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_gettime)
     movl    $__NR_timerfd_gettime, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/timerfd_settime.S b/libc/arch-x86_64/syscalls/timerfd_settime.S
index 8610a1d..65a17e1 100644
--- a/libc/arch-x86_64/syscalls/timerfd_settime.S
+++ b/libc/arch-x86_64/syscalls/timerfd_settime.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(timerfd_settime)
     movq    %rcx, %r10
     movl    $__NR_timerfd_settime, %eax
diff --git a/libc/arch-x86_64/syscalls/times.S b/libc/arch-x86_64/syscalls/times.S
index 07590b9..5ee21be 100644
--- a/libc/arch-x86_64/syscalls/times.S
+++ b/libc/arch-x86_64/syscalls/times.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(times)
     movl    $__NR_times, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/truncate.S b/libc/arch-x86_64/syscalls/truncate.S
index db2121f..2dc1793 100644
--- a/libc/arch-x86_64/syscalls/truncate.S
+++ b/libc/arch-x86_64/syscalls/truncate.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(truncate)
     movl    $__NR_truncate, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/umask.S b/libc/arch-x86_64/syscalls/umask.S
index badea76..ad102bd 100644
--- a/libc/arch-x86_64/syscalls/umask.S
+++ b/libc/arch-x86_64/syscalls/umask.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(umask)
     movl    $__NR_umask, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/umount2.S b/libc/arch-x86_64/syscalls/umount2.S
index 93e6fa0..31588de 100644
--- a/libc/arch-x86_64/syscalls/umount2.S
+++ b/libc/arch-x86_64/syscalls/umount2.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(umount2)
     movl    $__NR_umount2, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/uname.S b/libc/arch-x86_64/syscalls/uname.S
index 4b0d1c5..ad2d8f4 100644
--- a/libc/arch-x86_64/syscalls/uname.S
+++ b/libc/arch-x86_64/syscalls/uname.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(uname)
     movl    $__NR_uname, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/unlinkat.S b/libc/arch-x86_64/syscalls/unlinkat.S
index f322f7d..e6aac2e 100644
--- a/libc/arch-x86_64/syscalls/unlinkat.S
+++ b/libc/arch-x86_64/syscalls/unlinkat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(unlinkat)
     movl    $__NR_unlinkat, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/unshare.S b/libc/arch-x86_64/syscalls/unshare.S
index b5395c1..6594df0 100644
--- a/libc/arch-x86_64/syscalls/unshare.S
+++ b/libc/arch-x86_64/syscalls/unshare.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(unshare)
     movl    $__NR_unshare, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/utimensat.S b/libc/arch-x86_64/syscalls/utimensat.S
index f90caf2..5eaac1b 100644
--- a/libc/arch-x86_64/syscalls/utimensat.S
+++ b/libc/arch-x86_64/syscalls/utimensat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(utimensat)
     movq    %rcx, %r10
     movl    $__NR_utimensat, %eax
diff --git a/libc/arch-x86_64/syscalls/vmsplice.S b/libc/arch-x86_64/syscalls/vmsplice.S
index cc94cc6..6f9e5d1 100644
--- a/libc/arch-x86_64/syscalls/vmsplice.S
+++ b/libc/arch-x86_64/syscalls/vmsplice.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(vmsplice)
     movq    %rcx, %r10
     movl    $__NR_vmsplice, %eax
diff --git a/libc/arch-x86_64/syscalls/wait4.S b/libc/arch-x86_64/syscalls/wait4.S
index 7948331..141fe19 100644
--- a/libc/arch-x86_64/syscalls/wait4.S
+++ b/libc/arch-x86_64/syscalls/wait4.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(wait4)
     movq    %rcx, %r10
     movl    $__NR_wait4, %eax
diff --git a/libc/arch-x86_64/syscalls/write.S b/libc/arch-x86_64/syscalls/write.S
index 7e3a563..498fca7 100644
--- a/libc/arch-x86_64/syscalls/write.S
+++ b/libc/arch-x86_64/syscalls/write.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(write)
     movl    $__NR_write, %eax
     syscall
diff --git a/libc/arch-x86_64/syscalls/writev.S b/libc/arch-x86_64/syscalls/writev.S
index 5fc040a..ef80eb8 100644
--- a/libc/arch-x86_64/syscalls/writev.S
+++ b/libc/arch-x86_64/syscalls/writev.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(writev)
     movl    $__NR_writev, %eax
     syscall