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path: root/src/thread/x86_64/syscall_cp.s
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Diffstat (limited to 'src/thread/x86_64/syscall_cp.s')
-rw-r--r--src/thread/x86_64/syscall_cp.s24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/thread/x86_64/syscall_cp.s b/src/thread/x86_64/syscall_cp.s
new file mode 100644
index 00000000..1894ce19
--- /dev/null
+++ b/src/thread/x86_64/syscall_cp.s
@@ -0,0 +1,24 @@
+.text
+.global __syscall_cp_asm
+.type __syscall_cp_asm,%function
+__syscall_cp_asm:
+ lea 1f(%rip),%rax
+ mov %rax,8(%rdi)
+ mov %rsp,(%rdi)
+ mov 16(%rdi),%eax
+ test %eax,%eax
+ jnz 2f
+ mov %rsi,%rax
+ mov %rdx,%rdi
+ mov %rcx,%rsi
+ mov %r8,%rdx
+ mov %r9,%r10
+ mov 8(%rsp),%r8
+ mov 16(%rsp),%r9
+1: syscall
+ ret
+2: xor %edi,%edi
+ mov %rdi,8(%r10)
+ mov %rdi,(%r10)
+ dec %rdi
+ jmp pthread_exit