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[OLEAUT32] Implement x64 call_method in asm

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This is based on the inline implementation for GCC.
This commit is contained in:
Timo Kreuzer 2022-08-27 08:55:25 +02:00
parent a007f5e490
commit 38fc6e1274
1 changed files with 54 additions and 2 deletions
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56
dll/win32/oleaut32/msvc.S
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@ -12,10 +12,62 @@
#include <asm.inc>
.code64
EXTERN __chkstk:PROC
// DWORD_PTR
// call_method(
// void *func, // rcx
// int nb_args, // edx
// const DWORD_PTR *args );
PUBLIC call_method
call_method:
int 2ch
FUNC call_method
push rbp
.PUSHREG rbp
push rsi
.PUSHREG rsi
push rdi
.PUSHREG rdi
mov rbp, rsp
.SETFRAME rbp, 0
.ENDPROLOG
// We need at least space for 4 parameters (home space)
mov rax, 4
cmp rdx, rax
cmovg rax, rdx
// Allocate dynamic stack space (aligned to 16 bytes)
lea rax, [rax * 8 + 15]
and rax, HEX(0FFFFFFFFFFFFFFF0)
call __chkstk
sub rsp, rax
// Save function pointer in rax
mov rax, rcx
// Copy parameters to the stack
mov rcx, rdx
mov rdi, rsp
mov rsi, r8
rep movsq
// Set up parameter registers for the call
mov rcx, qword ptr [rsp + 0]
mov rdx, qword ptr [rsp + 8]
mov r8, qword ptr [rsp + 16]
mov r9, qword ptr [rsp + 24]
movq xmm0, qword ptr [rsp + 0]
movq xmm1, qword ptr [rsp + 8]
movq xmm2, qword ptr [rsp + 16]
movq xmm3, qword ptr [rsp + 24]
call rax
lea rsp, [rbp]
pop rdi
pop rsi
pop rbp
ret
ENDFUNC
PUBLIC call_double_method
call_double_method: