noob questions about uasm64 usage

[TimoVJL]

Code Select Expand

ExitProcess proto :dword
ShellExecuteA proto :ptr, :ptr, :ptr, :ptr, :ptr, :dword
URLDownloadToFileA  proto :ptr, :ptr, :ptr, :dword, :ptr
as LP... is a pointer

Code Select Expand

HRESULT URLDownloadToFile(LPUNKNOWN pCaller, LPCTSTR szURL, LPCTSTR szFileName, _Reserved_ DWORD dwReserved, LPBINDSTATUSCALLBACK lpfnCB);
HINSTANCE ShellExecuteA(HWND hwnd, LPCSTR lpOperation, LPCSTR lpFile, LPCSTR lpParameters, LPCSTR lpDirectory, INT nShowCmd);

uasm and asmc

Code Select Expand

option casemap:none
option win64:15
option stackbase:rsp

includelib kernel32
includelib urlmon

ExitProcess proto :dword
URLDownloadToFileA  proto :ptr, :ptr, :ptr, :dword, :ptr

.data
url db "https://forum.pellesc.de/index.php?topic=3253.0",0
align 8
htm  db "PellesC.htm",0

.code
WinMainCRTStartup proc FRAME
invoke URLDownloadToFileA, 0, addr url, addr htm, 0, 0
xor ecx, ecx
invoke ExitProcess, ecx
WinMainCRTStartup endp
END

a test with ml64 too:

Code Select Expand

includelib kernel32
includelib urlmon
extern __imp_URLDownloadToFileA :proc
extern __imp_ExitProcess :proc
.data
url db "https://forum.pellesc.de/index.php?topic=3253.0",0
align 8
htm  db "PellesC.htm",0
public WinMainCRTStartup
.code
WinMainCRTStartup:
sub rsp, 38h
xor ecx, ecx
lea rdx, url
lea r8, htm
xor r9d, r9d
;mov qword ptr [rsp+20h], 0h
mov qword ptr [rsp+20h], rcx
call qword ptr [__imp_URLDownloadToFileA]
xor ecx, ecx
call qword ptr [__imp_ExitProcess]
END
and poasm:

Code Select Expand

includelib kernel32
includelib urlmon
extern __imp_URLDownloadToFileA :proc
extern __imp_ExitProcess :proc
.data
url db "https://forum.pellesc.de/index.php?topic=3253.0",0
align 8
htm  db "PellesC.htm",0
public WinMainCRTStartup
.code
WinMainCRTStartup:
sub rsp, 38h
xor ecx, ecx
lea rdx, [rip+url]
lea r8, [rip+htm]
xor r9d, r9d
;mov qword ptr [rsp+20h], 0h
mov qword ptr [rsp+20h], rcx
call qword ptr [rip+__imp_URLDownloadToFileA]
xor ecx, ecx
call qword ptr [rip+__imp_ExitProcess]
ENDwith invoke

Code Select Expand

includelib kernel32
includelib urlmon

ExitProcess proto :dword
URLDownloadToFileA  proto :ptr, :ptr, :ptr, :dword, :ptr

.data
url db "https://forum.pellesc.de/index.php?topic=3253.0",0
align 8
htm  db "PellesC.htm",0

.code
WinMainCRTStartup proc PARMAREA=5*8
invoke URLDownloadToFileA, 0, addr url, addr htm, 0, 0
mov ecx, ecx
invoke ExitProcess, ecx
WinMainCRTStartup endp
END