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flat assembler > Non-x86 architectures > in fasmarm it is possible to code something like this

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ProMiNick



Joined: 24 Mar 2012
Posts: 160
Location: Russian Federation, Sochi
Code:
;format PE CEGUI 2.11 at $10000 format PE GUI 2.11 at $10000;rename binary as 'winCE.EXE' PE.Settings.Machine = IMAGE_FILE_MACHINE_ARM PE.Settings.Subsystem = IMAGE_SUBSYSTEM_WINDOWS_CE_GUI entry start ;launch CMD line '%OUTPUT%' include 'wincew.inc' section '.text' code readable executable start: ;invoke GetModuleHandle,0 ; {MOV R0, #0; BL GetModuleHandle} ;STR R0, [wc.hInstance] STR R4, [wc.hInstance] ; Initialy R4 holds hInstance LDR R1, WindowProc STR R1, [wc.lpfnWndProc] MOV R1, COLOR_BTNFACE+1 STR R1, [wc.hbrBackground] LDR R1, _class STR R1, [wc.lpszClassName] invoke LoadIcon,R0,IDI_APPLICATION ; {MOV R1, IDI_APPLICATION; BL LoadIcon} STR R0, [wc.hIcon] invoke RegisterClass,wc ; {LDR R0, wc; BL RegisterClass} CMP R0,#0 BEQ error invoke CreateWindowEx,0,_class,_title,$10000000,0,0,100,100,NULL,NULL,[wc.hInstance],NULL ; {MOV R0, #0; LDR R1, _class; LDR R2, _title; MOV R3, $10000000; (MOV R5, NULL; STR R5, [SP]), (LDR R5, [wc.hInstance]; STR R5, [SP-4]), (MOV R5, NULL; STR R5, [SP-8]), (MOV R5, NULL; STR R5, [SP-12]), (MOV R5, 100; STR R5, [SP-16]), (MOV R5, 100; STR R5, [SP-20]), (MOV R5, 0; STR R5, [SP-16]), (MOV R5, 0; STR R5, [SP-20]), later 4 nulls for 4 params via registers; BL CreateWindowEx} CMP R0,#0 BEQ error msg_loop: invoke GetMessage,msg,NULL,0,0 ; {LDR R0, msg; MOV R1, NULL; MOV R2, #0; MOV R3, #0; BL GetMessage} CMP R0, #0 BEQ end_loop invoke TranslateMessage,msg ; {LDR R0, msg; BL TranslateMessage} invoke DispatchMessage,msg ; {LDR R0, msg; BL DispatchMessage} B msg_loop error: invoke MessageBox,NULL,_error,NULL,MB_ICONERROR+MB_OK ; MOV R0, NULL; LDR R1, _error; MOV R2, NULL; MOV R3, MB_ICONERROR+MB_OK; BL MessageBox} end_loop: ;invoke ExitProcess,0 MOV R0,#0 MOV PC,$F000F7F8 ;B $F000F7F8; ExitProcess=$F000F7F8? proc WindowProc uses R4 R5 R6 R7 R8 R11 LR, hwnd,wmsg,wparam,lparam CMP R1,WM_DESTROY BEQ .wmdestroy .defwndproc: invoke DefWindowProc,R0,R1,R2,R3 B .finish .wmdestroy: invoke PostQuitMessage,0 ; {MOV R0, #0; BL PostQuitMessage} MOV R0,#0 .finish: ret endp section '.data' data readable writeable _class TCHAR 'FASMWINCE',0 _title TCHAR 'WinCE program template',0 _error TCHAR 'Startup failed.',0 wc WNDCLASS style:0, lpfnWndProc:WindowProc, hbrBackground:COLOR_BTNFACE+1, lpszClassName:_class msg MSG section '.idata' import data readable writeable ;DCD 0,0,0,RVA coredll_name,RVA coredll_table ;dd 0,0,0,0,0 ;coredll_table: ; ExitProcess dd RVA _ExitProcess ; dd 0 ;coredll_name db 'COREDLL.DLL',0 ;LoadIcon dw 0 ; db 'LoadIconW',0 ;RegisterClass dw 0 ; db 'RegisterClassW',0 ;CreateWindowEx dw 0 ; db 'CreateWindowExW',0 ;GetMessage dw 0 ; db 'GetMessageW',0 ;TranslateMessage dw 0 ; db 'TranslateMessage',0 ;DispatchMessage dw 0 ; db 'DispatchMessageW',0 ;MessageBox dw 0 ; db 'MessageBoxW',0 ;DefWindowProc dw 0 ; db 'DefWindowProcW',0 ;PostQuitMessage dw 0 ; db 'PostQuitMessageW',0 library coredll,'COREDLL.DLL' include 'ABI\WINCE\API\coredll.inc'


where is correct formatter includes & macros to ARM format variations & ARM OSes

question: registers R0-R3 for calls 1st 4 args, what is the best register for temp calculations? to make some things via macro?
(I would prefer to change order of STR instruction to Intel like syntax).
Why I try ARM in wince - it small, easy to emulate & it structures & apies looks like windows structures & apies. this is skeleton of app, for now wincew.inc & ceredll.inc - not exists.

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Post 14 May 2018, 10:02
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15875
Location: 162173 Ryugu
Yes, you could make all the various macros to do that if you wanted.

The register usage for calls will follow the ARM call standard. R4-R11 to be preserved. R0-R3, R12 volatile. R13 stack. R14 return address. R15 is PC. And R12 is used by the ARM compiler for long jumps/calls.
Post 14 May 2018, 10:38
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