[Minios-devel] [PATCH v3 23/43] arm64: implement the arm_start_thread

[Huang Shijie <shijie.huang@xxxxxxx>]

This patch implements the arm_start_thread which is called
when a thread is executed at the first time.

Signed-off-by: Huang Shijie <shijie.huang@xxxxxxx>
---
 arch/arm/arm64/arm64.S | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/arm64/arm64.S b/arch/arm/arm64/arm64.S
index 5f55f99..93ffc89 100644
--- a/arch/arm/arm64/arm64.S
+++ b/arch/arm/arm64/arm64.S
@@ -472,3 +472,17 @@ ENTRY(__arch_switch_threads)
 
     br    x30
 ENDPROC(__arch_switch_threads)
+
+/*
+ * => sp = thread->sp
+ * <= x0 -> user data
+ *    x1 -> thread's main function
+ *
+ *  Get the x0/x1, and set the lr(x30) with exit_thread.
+ */
+ENTRY(arm_start_thread)
+    mov  x2, sp
+    ldp  x0, x1, [x2]
+    ldr  x30, =exit_thread
+    br  x1
+ENDPROC(arm_start_thread)
-- 
2.7.4


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