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-rw-r--r--libc/sysdeps/linux/arc/clone.S12
1 files changed, 11 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/arc/clone.S b/libc/sysdeps/linux/arc/clone.S
index db5000caf..3c1388ec7 100644
--- a/libc/sysdeps/linux/arc/clone.S
+++ b/libc/sysdeps/linux/arc/clone.S
@@ -29,6 +29,7 @@
#define CLONE_VM 0x00000100
#define CLONE_THREAD 0x00010000
+#define CLONE_SETTLS 0x00080000
#define CLONE_THREAD_N_VM (CLONE_THREAD | CLONE_VM)
ENTRY(clone)
@@ -42,6 +43,7 @@ ENTRY(clone)
mov r10, r0 ; @fn
mov r11, r3 ; @args
mov r12, r2 ; @clone_flags
+ mov r9, r5 ; @tls
; adjust libc args for syscall
@@ -57,6 +59,14 @@ ENTRY(clone)
jnz [blink] ; Parent returns
; ----- child starts here ---------
+
+#if defined(__UCLIBC_HAS_TLS__)
+ ; Setup TP register (since kernel doesn't do that)
+ and.f 0, r12, CLONE_SETTLS
+ bz .Lnext_clone_quirk
+ SET_TP r9
+
+.Lnext_clone_quirk:
#ifdef RESET_PID
mov_s r2, CLONE_THREAD_N_VM
and_s r2, r2, r12
@@ -70,7 +80,7 @@ ENTRY(clone)
.Lgo_thread:
#endif
-
+#endif
; child jumps off to @fn with @arg as argument, and returns here
jl.d [r10]
mov r0, r11