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Align only main function

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Roman Venediktov 2024-02-02 17:38:04 +01:00
parent 3ae187683a
commit 2dadccc71f
1 changed files with 7 additions and 2 deletions
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src/X86.ml
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@ -669,8 +669,6 @@ let compile cmd env imports code =
Mov (rsp, rbp); Mov (rsp, rbp);
Meta "\t.cfi_def_cfa_register\t5"; Meta "\t.cfi_def_cfa_register\t5";
Binop ("-", M ("$" ^ env#lsize), rsp); Binop ("-", M ("$" ^ env#lsize), rsp);
Mov (M "$0xFFFFFFFFFFFFFFF0", rax);
Binop ("&&", rax, rsp);
Mov (rdi, r12); Mov (rdi, r12);
Mov (rsi, r13); Mov (rsi, r13);
Mov (rcx, r14); Mov (rcx, r14);
@ -684,6 +682,13 @@ let compile cmd env imports code =
] ]
@ (if f = "main" then @ (if f = "main" then
[ [
(* Align stack as main function is the only function that could be called without alignment *)
Mov (M "$0xF", rax);
Binop ("test", rsp, rax);
CJmp ("z", "_ALIGNED");
Push (M "$filler");
Label "_ALIGNED";
(* Initialize gc and arguments *)
Push (R Registers.rdi); Push (R Registers.rdi);
Push (R Registers.rsi); Push (R Registers.rsi);
Call "__gc_init"; Call "__gc_init";