https://git.reactos.org/?p=reactos.git;a=commitdiff;h=38fc6e1274c979de54089ce825a1f2d0c3b50cfe
commit 38fc6e1274c979de54089ce825a1f2d0c3b50cfe Author: Timo Kreuzer <[email protected]> AuthorDate: Sat Aug 27 08:55:25 2022 +0200 Commit: Timo Kreuzer <[email protected]> CommitDate: Thu Nov 24 21:17:58 2022 +0200 [OLEAUT32] Implement x64 call_method in asm This is based on the inline implementation for GCC. --- dll/win32/oleaut32/msvc.S | 56 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 54 insertions(+), 2 deletions(-) diff --git a/dll/win32/oleaut32/msvc.S b/dll/win32/oleaut32/msvc.S index 7503cd1231f..3c2633f7141 100644 --- a/dll/win32/oleaut32/msvc.S +++ b/dll/win32/oleaut32/msvc.S @@ -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:
