From 826d1afd58c2e064a9c8fdb09eda1b08469de1a8 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Fri, 18 Feb 2022 12:36:57 -0500
Subject: newer version of tcc almost working

---
 05/tcc-0.9.27/lib/alloca86_64-bt.S | 56 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 05/tcc-0.9.27/lib/alloca86_64-bt.S

(limited to '05/tcc-0.9.27/lib/alloca86_64-bt.S')

diff --git a/05/tcc-0.9.27/lib/alloca86_64-bt.S b/05/tcc-0.9.27/lib/alloca86_64-bt.S
new file mode 100644
index 0000000..4cbad90
--- /dev/null
+++ b/05/tcc-0.9.27/lib/alloca86_64-bt.S
@@ -0,0 +1,56 @@
+/* ---------------------------------------------- */
+/* alloca86_64.S */
+
+.globl __bound_alloca
+__bound_alloca:
+
+#ifdef _WIN32
+    # bound checking is not implemented
+    pop     %rdx
+    mov     %rcx,%rax
+    add     $15,%rax
+    and     $-16,%rax
+    jz      p3
+
+p1:
+    cmp     $4096,%rax
+    jbe     p2
+    test    %rax,-4096(%rsp)
+    sub     $4096,%rsp
+    sub     $4096,%rax
+    jmp p1
+p2:
+
+    sub     %rax,%rsp
+    mov     %rsp,%rax
+    add     $32,%rax
+
+p3:
+    push    %rdx
+    ret
+#else
+    pop     %rdx
+    mov     %rdi,%rax
+    mov     %rax,%rsi	# size, a second parm to the __bound_new_region
+
+    add     $15,%rax
+    and     $-16,%rax
+    jz      p3
+
+
+    sub     %rax,%rsp
+    mov     %rsp,%rdi	# pointer, a first parm to the __bound_new_region
+    mov     %rsp,%rax
+
+    push    %rdx
+    push    %rax
+    call   __bound_new_region
+    pop     %rax
+    pop     %rdx
+
+p3:
+    push    %rdx
+    ret
+#endif
+
+/* ---------------------------------------------- */
-- 
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