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ProMiNick 21 Jun 2022, 18:44
Code: format ELF64 executable at $400000 SYMBOL_TABLE_ENTRY64.size = $18 RELOC_TABLE_ENTRY64.size = $18 StrTabEntry equ -STRING_TABLE+ R_X86_64_JUMP_SLOT = 7 rva equ DT_NULL = 0 DT_NEEDED = 1 DT_HASH = 4 DT_STRTAB = 5 DT_SYMTAB = 6 DT_RELA = 7 DT_RELASZ = 8 DT_RELENT = 9 DT_STRSZ = 10 DT_SYMENT = 11 xdisp.default_screen = $E0 xdisp.screens = $E8 scr.white_pixel = $58 scr.black_pixel = $60 scr.root = $10 gcval.foreground = $10 gcval.background = $18 xae.type = 0 xee.count = $38 xkpe.keycode = $54 bitmap_x = 64 bitmap_y = 54 win_width = 150 win_height = 100 GCBackground = 8 GCForeground = 4 KeyPressMask = 1 ExposureMask = $8000 Expose = 12 KeyPress = 2 XK_Escape = $FF1B STDOUT = 1 sys_write = 1 sys_exit = $3C segment interpreter readable db '/lib64/ld-linux-x86-64.so.2',0 segment dynamic readable DYNAMIC_TABLE: dq DT_NEEDED,StrTabEntry(str@libX11.so.6) dq DT_NEEDED,StrTabEntry(str@libc.so.6) dq DT_HASH,rva HASH_TABLE dq DT_STRTAB,rva STRING_TABLE dq DT_SYMTAB,rva SYMBOL_TABLE dq DT_RELA,rva RELOC_TABLE dq DT_RELASZ,relasz dq DT_RELENT,RELOC_TABLE_ENTRY64.size dq DT_STRSZ,strsz dq DT_SYMENT,SYMBOL_TABLE_ENTRY64.size dq DT_NULL,0 align $20 HASH_TABLE: .n_bucket dd 17 .n_chain dd 25 .bucket dd 2, 17, 18, 21, 6, 0, 0, 1 dd 14, 16, 23, 13, 0, 19, 22, 24 dd 0 .chain dd 0, 0, 0, 0, 0, 0, 5, 0 dd 4, 0, 0, 0, 8, 9, 7, 12 dd 11, 0, 0, 3, 10, 0, 15, 20 dd 0 SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@LibcStartMain),$20,0,0,0,0 dd StrTabEntry(str@XCopyPlane),$12,0,0,$175,0 dd StrTabEntry(str@XSync),$12,0,0,$11B,0 dd StrTabEntry(str@XMapWindow),$12,0,0,$B9,0 dd StrTabEntry(str@_DYNAMIC),$11 + $FFF1 shl 16,rva DYNAMIC_TABLE,0,0,0 dd StrTabEntry(str@XCloseDisplay),$12,0,0,$D7,0 dd StrTabEntry(str@getenv),$12,0,0,$DD,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,$158,0 dd StrTabEntry(str@XFreeGC),$12,0,0,$F9,0 dd StrTabEntry(str@XReadBitmapFile),$12,0,0,$A3,0 dd StrTabEntry(str@_init),$20,0,0,0,0 dd StrTabEntry(str@XKeycodeToKeysym),$12,0,0,$254,0 dd StrTabEntry(str@__bss_start),$20,0,0,0,0 dd StrTabEntry(str@_fini),$20,0,0,0,0 dd StrTabEntry(str@XFlush),$12,0,0,$53,0 dd StrTabEntry(str@XNextEvent),$12,0,0,$AB,0 dd StrTabEntry(str@_edata),$20,0,0,0,0 dd StrTabEntry(str@_GLOBAL_OFFSET_TABLE_),$20,0,0,0,0 dd StrTabEntry(str@_end),$20,0,0,0,0 dd StrTabEntry(str@XSelectInput),$12,0,0,$FB,0 dd StrTabEntry(str@_Jv_RegisterClasses),$20,0,0,0,0 dd StrTabEntry(str@XCreateGC),$12,0,0,$267,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,$1062,0 dd StrTabEntry(str@__gmon_start__),$20,0,0,0,0 STRING_TABLE: db 0 str@libX11.so.6 db 'libX11.so.6',0 str@XCopyPlane db 'XCopyPlane',0 str@XSync db 'XSync',0 str@XMapWindow db 'XMapWindow',0 str@_DYNAMIC db '_DYNAMIC',0 str@XCloseDisplay db 'XCloseDisplay',0 str@XCreateSimpleWindow db 'XCreateSimpleWindow',0 str@XFreeGC db 'XFreeGC',0 str@XReadBitmapFile db 'XReadBitmapFile',0 str@_init db '_init',0 str@XKeycodeToKeysym db 'XKeycodeToKeysym',0 str@_fini db '_fini',0 str@XFlush db 'XFlush',0 str@XNextEvent db 'XNextEvent',0 str@_GLOBAL_OFFSET_TABLE_ db '_GLOBAL_OFFSET_TABLE_',0 str@XSelectInput db 'XSelectInput',0 str@_Jv_RegisterClasses db '_Jv_RegisterClasses',0 str@XCreateGC db 'XCreateGC',0 str@XOpenDisplay db 'XOpenDisplay',0 str@__gmon_start__ db '__gmon_start__',0 str@libc.so.6 db 'libc.so.6',0 str@getenv db 'getenv',0 str@LibcStartMain db '__libc_start_main',0 str@_edata db '_edata',0 str@__bss_start db '__bss_start',0 str@_end db '_end',0 strsz = $-STRING_TABLE align $8 RELOC_TABLE: dq XCopyPlane, R_X86_64_JUMP_SLOT+ 2 shl 32, 0 dq XSync, R_X86_64_JUMP_SLOT+ 3 shl 32, 0 dq XMapWindow, R_X86_64_JUMP_SLOT+ 4 shl 32, 0 dq XCloseDisplay, R_X86_64_JUMP_SLOT+ 6 shl 32, 0 dq getenv, R_X86_64_JUMP_SLOT+ 7 shl 32, 0 dq XCreateSimpleWindow, R_X86_64_JUMP_SLOT+ 8 shl 32, 0 dq XFreeGC, R_X86_64_JUMP_SLOT+ 9 shl 32, 0 dq XReadBitmapFile, R_X86_64_JUMP_SLOT+ 10 shl 32, 0 dq XKeycodeToKeysym, R_X86_64_JUMP_SLOT+ 12 shl 32, 0 dq XNextEvent, R_X86_64_JUMP_SLOT+ 16 shl 32, 0 dq XSelectInput, R_X86_64_JUMP_SLOT+ 20 shl 32, 0 dq XCreateGC, R_X86_64_JUMP_SLOT+ 22 shl 32, 0 dq XOpenDisplay, R_X86_64_JUMP_SLOT+ 23 shl 32, 0 relasz = $-RELOC_TABLE segment readable writeable executable entry $ lea rdi,[display_name] call [getenv] lea r11,[msg00] or rax,rax jz error_exit lea rdi,[rax] call [XOpenDisplay] lea r11,[msg01] or rax,rax jz error_exit mov qword [disp],rax mov edx,dword [rax + xdisp.default_screen] ; XDisplay.default_screen mov rsi,qword [rax + xdisp.screens] lea rdi,[rsi + rdx*8] mov qword [screen],rsi mov rcx,qword [rdi + scr.white_pixel] mov rdx,qword [rdi + scr.black_pixel] mov qword [rsp+8*2],rcx mov qword [rsp+8*1],rdx mov qword [rsp+8*0],4 mov r9d,win_height mov r8d,win_width xor ecx,ecx xor edx,edx mov rsi,qword [rdi + scr.root] mov qword [root],rsi mov rdi,qword [disp] call [XCreateSimpleWindow] mov qword [win],rax mov rsi,qword [win] mov rdi,qword [disp] call [XMapWindow] xor esi,esi mov rdi,qword [disp] call [XSync] mov rsi,qword [screen] lea rcx,[values] mov r9,qword [rsi + scr.black_pixel] mov r8,qword [rsi + scr.white_pixel] mov qword [rcx + gcval.foreground],r9 mov qword [rcx + gcval.background],r8 mov edx,GCBackground or GCForeground ; valuemask mov rsi,qword [win] mov rdi,qword [disp] call [XCreateGC] mov qword [our_gc],rax xor esi,esi mov rdi,qword [disp] call [XSync] lea rcx,[bitmap_y_hot] lea rdx,[bitmap_x_hot] mov qword [rsp+8*1],rcx mov qword [rsp+8*0],rdx lea r9,[bitmap] lea r8,[bitmap_height] lea rcx,[bitmap_width] lea rdx,[bitmap_FileName] mov rsi,qword [root] mov rdi,qword [disp] call [XReadBitmapFile] lea r11,[msg02] or rax,rax jnz error_exit call CopyPlane_proc mov edx,KeyPressMask or ExposureMask mov rsi,qword [win] mov rdi,qword [disp] call [XSelectInput] event_loop: lea rsi,[event] mov rdi,qword [disp] call [XNextEvent] lea rax,[event] mov ecx,dword [rax + xae.type] cmp ecx,Expose jz ExposeEvent_proc cmp ecx,KeyPress jz KeyPress_proc jmp event_loop ExposeEvent_proc: cmp dword [rax + xee.count],0 jnz event_loop call CopyPlane_proc jmp event_loop KeyPress_proc: xor edx,edx mov esi,dword [rax + xkpe.keycode] mov rdi,qword [disp] call [XKeycodeToKeysym] cmp eax,XK_Escape jnz event_loop mov rsi,qword [our_gc] mov rdi,qword [disp] call [XFreeGC] mov rdi,qword [disp] call [XCloseDisplay] exit0: xor edi,edi exit: mov eax,sys_exit syscall error_exit: lea rax,[r11] call wzts_std mov edi,1 jmp exit align 8 CopyPlane_proc: sub rsp,8*6 mov qword [rsp+8*4],1 mov qword [rsp+8*3],(win_height - bitmap_y) / 2 mov qword [rsp+8*2],(win_width - bitmap_x) / 2 mov rcx,qword [bitmap_height] mov rdx,qword [bitmap_width] mov qword [rsp+8*1],rcx mov qword [rsp+8*0],rdx xor r9,r9 xor r8,r8 mov rcx,qword [our_gc] mov rdx,qword [win] mov rsi,qword [bitmap] mov rdi,qword [disp] call [XCopyPlane] add rsp,8*6 ret wzts_std: stc ; assume we fail pushf push rax push rcx push rdx push rsi push rdi lea rdi,[rax] ; get string address lea rsi,[rax] or ecx,-1 ; ecx=-1 xor eax,eax lea edx,[ecx-1] ; edx=-2 cld repnz scasb sub edx,ecx ; string size jz wzts_std_done mov edi,STDOUT mov eax,sys_write syscall wzts_std_done: or rax,rax ; check if rax<0 (error) setns al ; make AL=1 if syscall success, else AL=0 xor byte [rsp+8*5],al pop rdi pop rsi pop rdx pop rcx pop rax popf ret segment readable writeable display_name db 'DISPLAY',0 msg00 db "There isn't 'DISPLAY' variable in environment!",0Ah,0 msg01 db "Can't connect to X Server!",0Ah,0 msg02 db "Something went wrong, check the bitmap file!",0Ah,0 bitmap_FileName db 'escherknot.xbm',0 align 8 disp dq ? screen dq ? root dq ? win dq ? our_gc dq ?,? bitmap dq ? bitmap_width dq ? bitmap_height dq ? bitmap_x_hot dd ?,? bitmap_y_hot dd ?,? dq ? event rb $C0 ; [EDIT]corrected - was 28 values rq 16 ; [EDIT]corrected - was 17 virtual ..extern: ; autocreate hidden segment XCopyPlane dq ? XSync dq ? XMapWindow dq ? XCloseDisplay dq ? getenv dq ? XCreateSimpleWindow dq ? XFreeGC dq ? XReadBitmapFile dq ? XKeycodeToKeysym dq ? XNextEvent dq ? XSelectInput dq ? XCreateGC dq ? XOpenDisplay dq ? ; we not needed the rest ; but it present in that hidden segment ; in order they present in symbol table ;__libc_start_main dq ? ;_init dq ? ;__bss_start dq ? ;_fini dq ? ;_edata dq ? ;_GLOBAL_OFFSET_TABLE_ dq ? ;_end dq ? ;_Jv_RegisterClasses dq ? ;__gmon_start__ dq ? end virtual requires in the same folder file escherknot.xbm from Ferino`s "_LinuxAMD64Example\x_windows\05_bitmap" What we could see from this? Exports in ELF are in virtual segment just after the last segment memory end From another example I know how calculated hashes & HASH_TABLE.chain & HASH_TABLE.bucket, but choice of HASH_TABLE.n_bucket value is still mystery to be continued...
_________________ I don`t like to refer by "you" to one person. My soul requires acronim "thou" instead. Last edited by ProMiNick on 23 Jun 2022, 14:35; edited 2 times in total |
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21 Jun 2022, 18:44 |
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revolution 21 Jun 2022, 18:52
You don't need a hash table. You can include the strings and the loader will search by text match instead.
It is "slower" without a hash table. That may or may not make a difference that is noticeable. If you have many thousand of imports then perhaps there is a perceivable difference? |
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21 Jun 2022, 18:52 |
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ProMiNick 21 Jun 2022, 19:29
Code: format ELF64 executable at $400000 SYMBOL_TABLE_ENTRY64.size = $18 RELOC_TABLE_ENTRY64.size = $18 StrTabEntry equ -STRING_TABLE+ R_X86_64_JUMP_SLOT = 7 DT_NULL = 0 DT_NEEDED = 1 DT_HASH = 4 DT_STRTAB = 5 DT_SYMTAB = 6 DT_RELA = 7 DT_RELASZ = 8 DT_RELENT = 9 DT_STRSZ = 10 DT_SYMENT = 11 xdisp.default_screen = $E0 xdisp.screens = $E8 scr.white_pixel = $58 scr.black_pixel = $60 scr.root = $10 gcval.foreground = $10 gcval.background = $18 xae.type = 0 xee.count = $38 xkpe.keycode = $54 bitmap_x = 64 bitmap_y = 54 win_width = 150 win_height = 100 GCBackground = 8 GCForeground = 4 KeyPressMask = 1 ExposureMask = $8000 Expose = 12 KeyPress = 2 XK_Escape = $FF1B STDOUT = 1 sys_write = 1 sys_exit = $3C segment interpreter readable db '/lib64/ld-linux-x86-64.so.2',0 segment dynamic readable DYNAMIC_TABLE: dq DT_NEEDED,StrTabEntry(str@libX11.so.6) dq DT_NEEDED,StrTabEntry(str@libc.so.6) dq DT_STRTAB, STRING_TABLE dq DT_SYMTAB, SYMBOL_TABLE dq DT_RELA, RELOC_TABLE dq DT_RELASZ,relasz dq DT_RELENT,RELOC_TABLE_ENTRY64.size dq DT_STRSZ,strsz dq DT_SYMENT,SYMBOL_TABLE_ENTRY64.size dq DT_NULL,0 align $20 SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@XCopyPlane),$12,0,0,$175,0 dd StrTabEntry(str@XSync),$12,0,0,$11B,0 dd StrTabEntry(str@XMapWindow),$12,0,0,$B9,0 dd StrTabEntry(str@XCloseDisplay),$12,0,0,$D7,0 dd StrTabEntry(str@getenv),$12,0,0,$DD,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,$158,0 dd StrTabEntry(str@XFreeGC),$12,0,0,$F9,0 dd StrTabEntry(str@XReadBitmapFile),$12,0,0,$A3,0 dd StrTabEntry(str@XKeycodeToKeysym),$12,0,0,$254,0 dd StrTabEntry(str@XFlush),$12,0,0,$53,0 dd StrTabEntry(str@XNextEvent),$12,0,0,$AB,0 dd StrTabEntry(str@XSelectInput),$12,0,0,$FB,0 dd StrTabEntry(str@XCreateGC),$12,0,0,$267,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,$1062,0 STRING_TABLE: db 0 str@libX11.so.6 db 'libX11.so.6',0 str@XCopyPlane db 'XCopyPlane',0 str@XSync db 'XSync',0 str@XMapWindow db 'XMapWindow',0 str@XCloseDisplay db 'XCloseDisplay',0 str@XCreateSimpleWindow db 'XCreateSimpleWindow',0 str@XFreeGC db 'XFreeGC',0 str@XReadBitmapFile db 'XReadBitmapFile',0 str@XKeycodeToKeysym db 'XKeycodeToKeysym',0 str@XFlush db 'XFlush',0 str@XNextEvent db 'XNextEvent',0 str@XSelectInput db 'XSelectInput',0 str@XCreateGC db 'XCreateGC',0 str@XOpenDisplay db 'XOpenDisplay',0 str@libc.so.6 db 'libc.so.6',0 str@getenv db 'getenv',0 strsz = $-STRING_TABLE align $8 RELOC_TABLE: dq XCopyPlane, R_X86_64_JUMP_SLOT+ 1 shl 32, 0 dq XSync, R_X86_64_JUMP_SLOT+ 2 shl 32, 0 dq XMapWindow, R_X86_64_JUMP_SLOT+ 3 shl 32, 0 dq XCloseDisplay, R_X86_64_JUMP_SLOT+ 4 shl 32, 0 dq getenv, R_X86_64_JUMP_SLOT+ 5 shl 32, 0 dq XCreateSimpleWindow, R_X86_64_JUMP_SLOT+ 6 shl 32, 0 dq XFreeGC, R_X86_64_JUMP_SLOT+ 7 shl 32, 0 dq XReadBitmapFile, R_X86_64_JUMP_SLOT+ 8 shl 32, 0 dq XKeycodeToKeysym, R_X86_64_JUMP_SLOT+ 9 shl 32, 0 dq XFlush, R_X86_64_JUMP_SLOT+ 10 shl 32, 0 dq XNextEvent, R_X86_64_JUMP_SLOT+ 11 shl 32, 0 dq XSelectInput, R_X86_64_JUMP_SLOT+ 12 shl 32, 0 dq XCreateGC, R_X86_64_JUMP_SLOT+ 13 shl 32, 0 dq XOpenDisplay, R_X86_64_JUMP_SLOT+ 14 shl 32, 0 relasz = $-RELOC_TABLE segment readable writeable executable entry $ lea rdi,[display_name] call [getenv] lea r11,[msg00] or rax,rax jz error_exit lea rdi,[rax] call [XOpenDisplay] lea r11,[msg01] or rax,rax jz error_exit mov qword [disp],rax mov edx,dword [rax + xdisp.default_screen] ; XDisplay.default_screen mov rsi,qword [rax + xdisp.screens] lea rdi,[rsi + rdx*8] mov qword [screen],rsi mov rcx,qword [rdi + scr.white_pixel] mov rdx,qword [rdi + scr.black_pixel] mov qword [rsp+8*2],rcx mov qword [rsp+8*1],rdx mov qword [rsp+8*0],4 mov r9d,win_height mov r8d,win_width xor ecx,ecx xor edx,edx mov rsi,qword [rdi + scr.root] mov qword [root],rsi mov rdi,qword [disp] call [XCreateSimpleWindow] mov qword [win],rax mov rsi,qword [win] mov rdi,qword [disp] call [XMapWindow] xor esi,esi mov rdi,qword [disp] call [XSync] mov rsi,qword [screen] lea rcx,[values] mov r9,qword [rsi + scr.black_pixel] mov r8,qword [rsi + scr.white_pixel] mov qword [rcx + gcval.foreground],r9 mov qword [rcx + gcval.background],r8 mov edx,GCBackground or GCForeground ; valuemask mov rsi,qword [win] mov rdi,qword [disp] call [XCreateGC] mov qword [our_gc],rax xor esi,esi mov rdi,qword [disp] call [XSync] lea rcx,[bitmap_y_hot] lea rdx,[bitmap_x_hot] mov qword [rsp+8*1],rcx mov qword [rsp+8*0],rdx lea r9,[bitmap] lea r8,[bitmap_height] lea rcx,[bitmap_width] lea rdx,[bitmap_FileName] mov rsi,qword [root] mov rdi,qword [disp] call [XReadBitmapFile] lea r11,[msg02] or rax,rax jnz error_exit call CopyPlane_proc mov edx,KeyPressMask or ExposureMask mov rsi,qword [win] mov rdi,qword [disp] call [XSelectInput] event_loop: lea rsi,[event] mov rdi,qword [disp] call [XNextEvent] lea rax,[event] mov ecx,dword [rax + xae.type] cmp ecx,Expose jz ExposeEvent_proc cmp ecx,KeyPress jz KeyPress_proc jmp event_loop ExposeEvent_proc: cmp dword [rax + xee.count],0 jnz event_loop call CopyPlane_proc jmp event_loop KeyPress_proc: xor edx,edx mov esi,dword [rax + xkpe.keycode] mov rdi,qword [disp] call [XKeycodeToKeysym] cmp eax,XK_Escape jnz event_loop mov rsi,qword [our_gc] mov rdi,qword [disp] call [XFreeGC] mov rdi,qword [disp] call [XCloseDisplay] exit0: xor edi,edi exit: mov eax,sys_exit syscall error_exit: lea rax,[r11] call wzts_std mov edi,1 jmp exit align 8 CopyPlane_proc: sub rsp,8*6 mov qword [rsp+8*4],1 mov qword [rsp+8*3],(win_height - bitmap_y) / 2 mov qword [rsp+8*2],(win_width - bitmap_x) / 2 mov rcx,qword [bitmap_height] mov rdx,qword [bitmap_width] mov qword [rsp+8*1],rcx mov qword [rsp+8*0],rdx xor r9,r9 xor r8,r8 mov rcx,qword [our_gc] mov rdx,qword [win] mov rsi,qword [bitmap] mov rdi,qword [disp] call [XCopyPlane] add rsp,8*6 ret wzts_std: stc ; assume we fail pushf push rax push rcx push rdx push rsi push rdi lea rdi,[rax] ; get string address lea rsi,[rax] or ecx,-1 ; ecx=-1 xor eax,eax lea edx,[ecx-1] ; edx=-2 cld repnz scasb sub edx,ecx ; string size jz wzts_std_done mov edi,STDOUT mov eax,sys_write syscall wzts_std_done: or rax,rax ; check if rax<0 (error) setns al ; make AL=1 if syscall success, else AL=0 xor byte [rsp+8*5],al pop rdi pop rsi pop rdx pop rcx pop rax popf ret segment readable writeable display_name db 'DISPLAY',0 msg00 db "There isn't 'DISPLAY' variable in environment!",0Ah,0 msg01 db "Can't connect to X Server!",0Ah,0 msg02 db "Something went wrong, check the bitmap file!",0Ah,0 bitmap_FileName db 'escherknot.xbm',0 align 8 disp dq ? screen dq ? root dq ? win dq ? our_gc dq ?,? bitmap dq ? bitmap_width dq ? bitmap_height dq ? bitmap_x_hot dd ?,? bitmap_y_hot dd ?,? dq ? event rb $C0 values rq $16 virtual ..extern: ; autocreate hidden segment XCopyPlane dq ? XSync dq ? XMapWindow dq ? XCloseDisplay dq ? getenv dq ? XCreateSimpleWindow dq ? XFreeGC dq ? XReadBitmapFile dq ? XKeycodeToKeysym dq ? XFlush dq ? XNextEvent dq ? XSelectInput dq ? XCreateGC dq ? XOpenDisplay dq ? end virtual well ELF GUI executable skeletal is done. (someone(or I) could make minimal GUI ELF executable). As I understand getenv can be realized directly in assembly (I dislike presence of libc in imports, C is for C, not for assembly). And, revolution, linuxers dislike interpreter or not? should interpreter be replaced by segment where will be realized loading & linking of imported libraries? Last edited by ProMiNick on 23 Jun 2022, 14:35; edited 3 times in total |
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21 Jun 2022, 19:29 |
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revolution 21 Jun 2022, 19:40
The interpreter is very useful IMO. Otherwise if you don't ask for the interpreter then you have to do all the linking manually in your code. It would be awful. But you could do it.
Also, if you don't include libc then that is fine. All you need to do is write the syscalls instead. And perhaps your own version of printf and whatnot. That is also doable. And much less awful than doing import linking manually. For getenv specifically, the environment is delivered to the app from the loader on the stack immediately above the arguments. So that is very easy to get in assembly. |
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21 Jun 2022, 19:40 |
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ProMiNick 21 Jun 2022, 21:50
pretendent to be minimal linux64 GUI executable file - 972 bytes
Code: format ELF64 executable at $400000 SYMBOL_TABLE_ENTRY64.size = $18 RELOC_TABLE_ENTRY64.size = $18 StrTabEntry equ -STRING_TABLE+ R_X86_64_JUMP_SLOT = 7 DT_NULL = 0 DT_NEEDED = 1 DT_HASH = 4 DT_STRTAB = 5 DT_SYMTAB = 6 DT_RELA = 7 DT_RELASZ = 8 DT_RELENT = 9 DT_STRSZ = 10 DT_SYMENT = 11 xdisp.default_screen = $E0 xdisp.screens = $E8 scr.white_pixel = $58 scr.black_pixel = $60 scr.root = $10 win_width = 150 win_height = 100 sys_exit = $3C segment interpreter readable db '/lib64/ld-linux-x86-64.so.2',0 segment dynamic readable DYNAMIC_TABLE: dq DT_NEEDED,StrTabEntry(str@libX11.so.6) dq DT_STRTAB,STRING_TABLE dq DT_SYMTAB,SYMBOL_TABLE dq DT_RELA,RELOC_TABLE dq DT_RELASZ,relasz dq DT_RELENT,RELOC_TABLE_ENTRY64.size dq DT_STRSZ,strsz dq DT_SYMENT,SYMBOL_TABLE_ENTRY64.size dq DT_NULL,0 SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@XMapRaised),$12,0,0,$B9,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,$158,0 dd StrTabEntry(str@XNextEvent),$12,0,0,$AB,0 dd StrTabEntry(str@XSelectInput),$12,0,0,$FB,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,$1062,0 STRING_TABLE: db 0 str@libX11.so.6 db 'libX11.so.6',0 str@XMapRaised db 'XMapRaised',0 str@XCreateSimpleWindow db 'XCreateSimpleWindow',0 str@XNextEvent db 'XNextEvent',0 str@XSelectInput db 'XSelectInput',0 str@XOpenDisplay db 'XOpenDisplay',0 strsz = $-STRING_TABLE align $8 RELOC_TABLE: dq XMapRaised, R_X86_64_JUMP_SLOT+ 1 shl 32, 0 dq XCreateSimpleWindow, R_X86_64_JUMP_SLOT+ 2 shl 32, 0 dq XNextEvent, R_X86_64_JUMP_SLOT+ 3 shl 32, 0 dq XSelectInput, R_X86_64_JUMP_SLOT+ 4 shl 32, 0 dq XOpenDisplay, R_X86_64_JUMP_SLOT+ 5 shl 32, 0 relasz = $-RELOC_TABLE segment readable writeable executable entry $ xor edi,edi call [XOpenDisplay] or rax,rax jz error_exit mov qword [disp],rax xchg rdi,rax mov eax,dword [rdi + xdisp.default_screen] ; XDisplay.default_screen shl eax,3 add rax,qword [rdi + xdisp.screens] push qword [rax + scr.white_pixel] push qword [rax + scr.black_pixel] push 4 mov r9d,win_height mov r8d,win_width xor ecx,ecx xor edx,edx mov rsi,qword [rax + scr.root] call [XCreateSimpleWindow] or rax,rax jz error_exit mov qword [win],rax xor edx,edx xchg rsi,rax mov rdi,qword [disp] call [XSelectInput] mov rsi,qword [win] mov rdi,qword [disp] call [XMapRaised] or rax,rax jz error_exit event_loop: lea rsi,[event] mov rdi,qword [disp] call [XNextEvent] jmp event_loop error_exit: mov edi,1 mov eax,sys_exit syscall segment readable writeable disp dq ? win dq ? event rb $C0 align 8 virtual XMapRaised dq ? XCreateSimpleWindow dq ? XNextEvent dq ? XSelectInput dq ? XOpenDisplay dq ? end virtual Last edited by ProMiNick on 22 Jun 2022, 09:49; edited 2 times in total |
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21 Jun 2022, 21:50 |
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FlierMate1 22 Jun 2022, 08:02
Hi, great discovery!
I purposely install Debian 11 on VirtualBox to see how it works (because it shows nothing in WSL). I paste your code as gui.asm, compile as gui, and extract escherknot.xbm and place the two files in the same folder. The following screenshots are the result. Although I get an empty window, it is still exciting to see your fruitful discovery. Have I done anything wrong to the files? EDIT: Looks like the last modified source won't show bitmap.
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22 Jun 2022, 08:02 |
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FlierMate1 23 Jun 2022, 08:59
Next, display "Hello, world" in the window.
To draw 8-bit characters in a given drawable, use XDrawString. Code: XDrawString(Display *display, Drawable d, GC gc, int x, int y, char *string, int length); https://www.x.org/releases/X11R7.7/doc/libX11/libX11/libX11.html#XDrawString (Xlib - C Language X Interface) The only issue is guesswork, what is that hex value in Symbol table: Code: SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@XMapRaised),$12,0,0,$B9,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,$158,0 dd StrTabEntry(str@XNextEvent),$12,0,0,$AB,0 dd StrTabEntry(str@XSelectInput),$12,0,0,$FB,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,$1062,0 E.g. 0xB9, 0x158, 0xAB, 0xFB, 0x1062. Finding out for str@XDrawString |
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23 Jun 2022, 08:59 |
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ProMiNick 23 Jun 2022, 10:01
Mysteric hex value is size of symbol. for R_X86_64_JUMP_SLOT size of symbol is no matter.
Code: dd StrTabEntry(str@XDrawString),$12,0,0,0,0 It can be seen that XMapWindow in example at start of topic replaced with XMapRaised in example of minimal GUI that have different size than $B9 - and all OK. |
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23 Jun 2022, 10:01 |
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FlierMate1 23 Jun 2022, 13:23
Thanks, it works, but I am having last issue with Bad Font in XCreateGC.
Do you think the below is correct? Code: ;typedef struct { ;4 int function; /* logical operation */ ;8 unsigned long plane_mask; /* plane mask */ ;8 unsigned long foreground; /* foreground pixel */ ;8 unsigned long background; /* background pixel */ ;4 int line_width; /* line width (in pixels) */ ;4 int line_style; /* LineSolid, LineOnOffDash, LineDoubleDash */ ;4 int cap_style; /* CapNotLast, CapButt, CapRound, CapProjecting */ ;4 int join_style; /* JoinMiter, JoinRound, JoinBevel */ ;4 int fill_style; /* FillSolid, FillTiled, FillStippled FillOpaqueStippled*/ ;4 int fill_rule; /* EvenOddRule, WindingRule */ ;4 int arc_mode; /* ArcChord, ArcPieSlice */ ;8 Pixmap tile; /* tile pixmap for tiling operations */ ;8 Pixmap stipple; /* stipple 1 plane pixmap for stippling */ ;4 int ts_x_origin; /* offset for tile or stipple operations */ ;4 int ts_y_origin ;8 Font font; /* default text font for text operations */ ;4 int subwindow_mode; /* ClipByChildren, IncludeInferiors */ ;1 Bool graphics_exposures; /* boolean, should exposures be generated */ ;4 int clip_x_origin; /* origin for clipping */ ;4 int clip_y_origin; ;8 Pixmap clip_mask; /* bitmap clipping; other calls for rects */ ;4 int dash_offset; /* patterned/dashed line information */ ;1 char dashes; ;} XGCValues; The size of XGCValues is defined as?? Code: segment readable writeable values rb 114 ;rq 17 (but I changed it to "rb 114" after calculating it) Also, I don't know how the original author calculated this: Code: gcval.foreground = 4+8 ;$10 gcval.background = 4+8+8 ;$18 gcval.font = 10*8 The $10 and $18 are original values. I think it is the offset to XGCValues, isn't it? Almost reach the "Hello World" simple window.  |
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23 Jun 2022, 13:23 |
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ProMiNick 23 Jun 2022, 13:42
Where I get?
from here fasm_amd64_linux64_p000.tar.gz from Topic "Linux 64 FASM coding" [EDIT]stupid content of post removed. XGCValues size approved by test. Code: 00000000 XGCValues struc ; (sizeof=0x80, align=0x8, copyof_4) 00000000 function dd ? 00000004 db ? ; undefined 00000005 db ? ; undefined 00000006 db ? ; undefined 00000007 db ? ; undefined 00000008 plane_mask dq ? 00000010 foreground dq ? 00000018 background dq ? 00000020 line_width dd ? 00000024 line_style dd ? 00000028 cap_style dd ? 0000002C join_style dd ? 00000030 fill_style dd ? 00000034 fill_rule dd ? 00000038 arc_mode dd ? 0000003C db ? ; undefined 0000003D db ? ; undefined 0000003E db ? ; undefined 0000003F db ? ; undefined 00000040 tile dq ? 00000048 stipple dq ? 00000050 ts_x_origin dd ? 00000054 ts_y_origin dd ? 00000058 font dq ? 00000060 subwindow_mode dd ? 00000064 graphics_exposures dd ? 00000068 clip_x_origin dd ? 0000006C clip_y_origin dd ? 00000070 clip_mask dq ? 00000078 dash_offset dd ? 0000007C dashes db ? 0000007D db ? ; undefined 0000007E db ? ; undefined 0000007F db ? ; undefined 00000080 XGCValues ends Last edited by ProMiNick on 23 Jun 2022, 14:32; edited 1 time in total |
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23 Jun 2022, 13:42 |
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revolution 23 Jun 2022, 14:19
By default C will align the structure members. So those undefined db's are the alignment.
Code: ;typedef struct { ;4 int function; /* logical operation */ ;4 alignment for the next member because it is a qword ;8 unsigned long plane_mask; /* plane mask */ ... |
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23 Jun 2022, 14:19 |
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FlierMate1 23 Jun 2022, 14:41
Thanks to the alignment, @ProMiNick and @revolution. Now my Font offset in XGCValues is finally error-free.
I have done the code, no error, (font_id is correct, XCreateGC does not complain anything), but it is still an empty window. I paste it here so that someone can help to rectify the bug, faster to achieve result. Thanks! Code: format ELF64 executable at $400000 SYMBOL_TABLE_ENTRY64.size = $18 RELOC_TABLE_ENTRY64.size = $18 StrTabEntry equ -STRING_TABLE+ R_X86_64_JUMP_SLOT = 7 DT_NULL = 0 DT_NEEDED = 1 DT_HASH = 4 DT_STRTAB = 5 DT_SYMTAB = 6 DT_RELA = 7 DT_RELASZ = 8 DT_RELENT = 9 DT_STRSZ = 10 DT_SYMENT = 11 xdisp.default_screen = $E0 xdisp.screens = $E8 scr.white_pixel = $58 scr.black_pixel = $60 scr.root = $10 win_width = 200 win_height = 150 gcval.foreground = 8+8 ;$10 gcval.background = 8+8+8 ;$18 gcval.font = 11*8 sys_exit = $3C GCBackground = 8 GCForeground = 4 GCFont = 16384 msg.x = 40 msg.y = 40 segment interpreter readable db '/lib64/ld-linux-x86-64.so.2',0 segment dynamic readable DYNAMIC_TABLE: dq DT_NEEDED,StrTabEntry(str@libX11.so.6) dq DT_STRTAB,STRING_TABLE dq DT_SYMTAB,SYMBOL_TABLE dq DT_RELA,RELOC_TABLE dq DT_RELASZ,relasz dq DT_RELENT,RELOC_TABLE_ENTRY64.size dq DT_STRSZ,strsz dq DT_SYMENT,SYMBOL_TABLE_ENTRY64.size dq DT_NULL,0 SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@XMapRaised),$12,0,0,0,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,0,0 dd StrTabEntry(str@XNextEvent),$12,0,0,0,0 dd StrTabEntry(str@XSelectInput),$12,0,0,0,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,0,0 dd StrTabEntry(str@XCreateGC),$12,0,0,0,0 dd StrTabEntry(str@XDrawString),$12,0,0,0,0 dd StrTabEntry(str@XSync),$12,0,0,0,0 dd StrTabEntry(str@XLoadFont),$12,0,0,0,0 dd StrTabEntry(str@XBlackPixel),$12,0,0,0,0 dd StrTabEntry(str@XWhitePixel),$12,0,0,0,0 STRING_TABLE: db 0 str@libX11.so.6 db 'libX11.so.6',0 str@XMapRaised db 'XMapRaised',0 str@XCreateSimpleWindow db 'XCreateSimpleWindow',0 str@XNextEvent db 'XNextEvent',0 str@XSelectInput db 'XSelectInput',0 str@XOpenDisplay db 'XOpenDisplay',0 str@XCreateGC db 'XCreateGC',0 str@XDrawString db 'XDrawString',0 str@XSync db 'XSync',0 str@XLoadFont db 'XLoadFont',0 str@XBlackPixel db 'XBlackPixel',0 str@XWhitePixel db 'XWhitePixel',0 strsz = $-STRING_TABLE align $8 RELOC_TABLE: dq XMapRaised, R_X86_64_JUMP_SLOT+ 1 shl 32, 0 dq XCreateSimpleWindow, R_X86_64_JUMP_SLOT+ 2 shl 32, 0 dq XNextEvent, R_X86_64_JUMP_SLOT+ 3 shl 32, 0 dq XSelectInput, R_X86_64_JUMP_SLOT+ 4 shl 32, 0 dq XOpenDisplay, R_X86_64_JUMP_SLOT+ 5 shl 32, 0 dq XCreateGC, R_X86_64_JUMP_SLOT+ 6 shl 32, 0 dq XDrawString, R_X86_64_JUMP_SLOT+ 7 shl 32, 0 dq XSync, R_X86_64_JUMP_SLOT+ 8 shl 32, 0 dq XLoadFont, R_X86_64_JUMP_SLOT+ 9 shl 32, 0 dq XBlackPixel, R_X86_64_JUMP_SLOT+ 10 shl 32, 0 dq XWhitePixel, R_X86_64_JUMP_SLOT+ 11 shl 32, 0 relasz = $-RELOC_TABLE segment readable writeable executable entry $ xor edi,edi call [XOpenDisplay] or rax,rax jz error_exit mov qword [disp],rax mov rsi,qword [rax + xdisp.screens] mov qword [screen],rsi xchg rdi,rax mov eax,dword [rdi + xdisp.default_screen] ; XDisplay.default_screen shl eax,3 add rax,qword [rdi + xdisp.screens] push qword [rax + scr.white_pixel] push qword [rax + scr.black_pixel] push 4 mov r9d,win_height mov r8d,win_width xor ecx,ecx xor edx,edx mov rsi,qword [rax + scr.root] call [XCreateSimpleWindow] or rax,rax jz error_exit mov qword [win],rax xor edx,edx xchg rsi,rax mov rdi,qword [disp] call [XSelectInput] mov rsi,qword [win] mov rdi,qword [disp] call [XMapRaised] or rax,rax jz error_exit ;Font XLoadFont(Display *display, char *name); lea rsi, [font_name] mov rdi, qword [disp] call [XLoadFont] mov qword [font_id], rax or rax,rax jz error_exit mov rsi,qword [screen] lea rcx, [values] mov r8, qword [font_id] mov r9, qword [rsi + scr.black_pixel] ;mov r10,qword [rsi + scr.white_pixel] mov qword [rcx+gcval.font], r8 ; font_id mov qword [rcx+gcval.foreground], r9 ;mov qword [rcx+gcval.background], r10 mov rdx,GCFont or GCForeground ; valuemask mov rsi,qword [win] ;drawable mov rdi,qword [disp] call [XCreateGC] mov qword [our_gc],rax or rax,rax jz error_exit ;XDrawString(Display *display, Drawable d, GC gc, int x, int y, char *string, int length); mov qword [rsp+8*0], len lea r9, [msg] mov r8, msg.y mov rcx, msg.x mov rdx, qword [our_gc] mov rsi,qword [win] ;drawable mov rdi,qword [disp] call [XDrawString] cmp rax, 7 ;BadFont jz error_exit cmp rax, 9 ;BadDrawable jz error_exit cmp rax, 13 ;BadGC jz error_exit event_loop: lea rsi,[event] mov rdi,qword [disp] call [XNextEvent] jmp event_loop ; mov rsi,qword [our_gc] ; mov rdi,qword [disp] ; call [XFreeGC] ; mov rdi,qword [disp] ; call [XCloseDisplay] error_exit: mov edi,1 mov eax,sys_exit syscall segment readable writeable disp dq ? win dq ? our_gc dq ?,? screen dq ? values rb 128 ;rq 17 msg db "Hello World!",0 len = $ - msg font_name db "fixed",0 ;"*helvetica-bold-r-normal--18*",0 font_id dq ? event rb $C0 align 8 virtual XMapRaised dq ? XCreateSimpleWindow dq ? XNextEvent dq ? XSelectInput dq ? XOpenDisplay dq ? XCreateGC dq ? XDrawString dq ? XSync dq ? XLoadFont dq ? XBlackPixel dq ? XWhitePixel dq ? end virtual ;typedef struct { ;4 int function; /* logical operation */ ;4 ;8 unsigned long plane_mask; /* plane mask */ ;8 unsigned long foreground; /* foreground pixel */ ;8 unsigned long background; /* background pixel */ ;4 int line_width; /* line width (in pixels) */ ;4 int line_style; /* LineSolid, LineOnOffDash, LineDoubleDash */ ;4 int cap_style; /* CapNotLast, CapButt, CapRound, CapProjecting */ ;4 int join_style; /* JoinMiter, JoinRound, JoinBevel */ ;4 int fill_style; /* FillSolid, FillTiled, FillStippled FillOpaqueStippled*/ ;4 int fill_rule; /* EvenOddRule, WindingRule */ ;4 int arc_mode; /* ArcChord, ArcPieSlice */ ;4 ;8 Pixmap tile; /* tile pixmap for tiling operations */ ;8 Pixmap stipple; /* stipple 1 plane pixmap for stippling */ ;4 int ts_x_origin; /* offset for tile or stipple operations */ ;4 int ts_y_origin ;8 Font font; /* default text font for text operations */ ;4 int subwindow_mode; /* ClipByChildren, IncludeInferiors */ ;1 Bool graphics_exposures; /* boolean, should exposures be generated */ ;4 int clip_x_origin; /* origin for clipping */ ;4 int clip_y_origin; ;8 Pixmap clip_mask; /* bitmap clipping; other calls for rects */ ;4 int dash_offset; /* patterned/dashed line information */ ;1 char dashes; ;} XGCValues; |
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23 Jun 2022, 14:41 |
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revolution 23 Jun 2022, 14:49
You need alignment after graphics_exposures for the next dword.
Code: ;1 Bool graphics_exposures; /* boolean, should exposures be generated */ ;3 align ;4 int clip_x_origin; /* origin for clipping */ ... |
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23 Jun 2022, 14:49 |
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FlierMate1 23 Jun 2022, 14:55
revolution wrote: You need alignment after graphics_exposures for the next dword. Yes, you're right. But it doesn't affect the code, because I reference "font" before "graphics_exposures": Code: ... ;4 int ts_x_origin; /* offset for tile or stipple operations */ ;4 int ts_y_origin ;8 Font font; /* default text font for text operations */ ... And somemore, "values" is already defined as 128: Code: values rb 128 ;rq 17 ...and... Code:
lea rcx, [values]
However, I am not very sure how to assign the 7th parameter: Code:
mov qword [rsp+8*0], len
lea r9, [msg]
Is the above correct? (for "len") |
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23 Jun 2022, 14:55 |
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revolution 23 Jun 2022, 14:57
You are only initialising two members of the entire structure. Are you sure leaving all the other members at zero is expected to work?
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23 Jun 2022, 14:57 |
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FlierMate1 23 Jun 2022, 15:01
revolution wrote: You are only initialising two members of the entire structure. Are you sure leaving all the other members at zero is expected to work? From the C example code online, I think it is correct. Because I did this: Code: mov qword [rcx+gcval.font], r8 ; font_id mov qword [rcx+gcval.foreground], r9 ;mov qword [rcx+gcval.background], r10 mov rdx,GCFont or GCForeground ; valuemask From: https://www.x.org/releases/X11R7.7/doc/libX11/libX11/libX11.html#Manipulating_Graphics_ContextState Quote: To set an attribute of a GC, set the appropriate member of the XGCValues structure and OR in the corresponding value bitmask in your subsequent calls to XCreateGC. |
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23 Jun 2022, 15:01 |
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FlierMate1 23 Jun 2022, 15:49
Or the following, simpler, also just an empty window:
Code:
;Font XLoadFont(Display *display, char *name);
lea rsi, [font_name]
mov rdi, qword [disp]
call [XLoadFont]
mov qword [font_id], rax
or rax,rax
jz error_exit
;GC XDefaultGC(Display *display, int screen_number);
xor rsi, rsi
mov rdi, qword [disp]
call [XDefaultGC]
mov qword [our_gc], rax
;XSetFont(Display *display, GC gc, Font font);
mov rdx, qword [font_id]
mov rsi, qword [our_gc]
mov rdi, qword [disp]
call [XSetFont]
(The code above is placed before XDrawString) |
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23 Jun 2022, 15:49 |
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FlierMate1 23 Jun 2022, 17:08
ProMiNick wrote: pretendent to be minimal linux64 GUI executable file - 972 bytes You win, mine is 1023 bytes, but code is shorter, I think. Code: format ELF64 executable 3 SYMBOL_TABLE_ENTRY64.size = $18 RELOC_TABLE_ENTRY64.size = $18 StrTabEntry equ -STRING_TABLE+ R_X86_64_JUMP_SLOT = 7 DT_NULL = 0 DT_NEEDED = 1 DT_HASH = 4 DT_STRTAB = 5 DT_SYMTAB = 6 DT_RELA = 7 DT_RELASZ = 8 DT_RELENT = 9 DT_STRSZ = 10 DT_SYMENT = 11 win_width = 256 win_height = 256 segment interpreter readable db '/lib64/ld-linux-x86-64.so.2',0 segment dynamic readable DYNAMIC_TABLE: dq DT_NEEDED,StrTabEntry(str@libX11.so.6) dq DT_STRTAB,STRING_TABLE dq DT_SYMTAB,SYMBOL_TABLE dq DT_RELA,RELOC_TABLE dq DT_RELASZ,relasz dq DT_RELENT,RELOC_TABLE_ENTRY64.size dq DT_STRSZ,strsz dq DT_SYMENT,SYMBOL_TABLE_ENTRY64.size dq DT_NULL,0 SYMBOL_TABLE: dd 0,0,0,0,0,0 dd StrTabEntry(str@XMapRaised),$12,0,0,0,0 dd StrTabEntry(str@XCreateSimpleWindow),$12,0,0,0,0 dd StrTabEntry(str@XNextEvent),$12,0,0,0,0 dd StrTabEntry(str@XSelectInput),$12,0,0,0,0 dd StrTabEntry(str@XOpenDisplay),$12,0,0,0,0 dd StrTabEntry(str@XDefaultRootWindow),$12,0,0,0,0 STRING_TABLE: db 0 str@libX11.so.6 db 'libX11.so.6',0 str@XMapRaised db 'XMapRaised',0 str@XCreateSimpleWindow db 'XCreateSimpleWindow',0 str@XNextEvent db 'XNextEvent',0 str@XSelectInput db 'XSelectInput',0 str@XOpenDisplay db 'XOpenDisplay',0 str@XDefaultRootWindow db 'XDefaultRootWindow',0 strsz = $-STRING_TABLE align $8 RELOC_TABLE: dq XMapRaised, R_X86_64_JUMP_SLOT+ 1 shl 32, 0 dq XCreateSimpleWindow, R_X86_64_JUMP_SLOT+ 2 shl 32, 0 dq XNextEvent, R_X86_64_JUMP_SLOT+ 3 shl 32, 0 dq XSelectInput, R_X86_64_JUMP_SLOT+ 4 shl 32, 0 dq XOpenDisplay, R_X86_64_JUMP_SLOT+ 5 shl 32, 0 dq XDefaultRootWindow, R_X86_64_JUMP_SLOT+ 6 shl 32, 0 relasz = $-RELOC_TABLE segment readable writeable executable entry $ ;Display *XOpenDisplay(char *display_name); xor edi,edi call [XOpenDisplay] mov qword [disp],rax ;Window XDefaultRootWindow(Display *display); mov rdi, qword [disp] call [XDefaultRootWindow] mov qword [root], rax ;Window XCreateSimpleWindow(Display *display, Window parent, intx, y, unsignedintwidth, height, unsignedint border_width, unsignedlong border, unsignedlong background); push 0xFFFFFF push 0 push 0 mov r9d, win_height mov r8d, win_width xor ecx, ecx xor edx, edx mov rsi, qword [root] mov rdi, qword [disp] call [XCreateSimpleWindow] mov qword [win],rax ;XMapRaised(Display *display, Window w); mov rsi,qword [win] mov rdi,qword [disp] call [XMapRaised] ;XSelectInput(Display *display, Window w, long event_mask); xor edx,edx mov rsi, qword [win] mov rdi,qword [disp] call [XSelectInput] event_loop: ;XNextEvent(Display *display, XEvent *event_return); lea rsi,[event] mov rdi,qword [disp] call [XNextEvent] jmp event_loop segment readable writeable disp dq ? root dq ? win dq ? ;gc dq ? event rb 32 align 8 virtual XMapRaised dq ? XCreateSimpleWindow dq ? XNextEvent dq ? XSelectInput dq ? XOpenDisplay dq ? XDefaultRootWindow dq ? end virtual |
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23 Jun 2022, 17:08 |
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revolution 23 Jun 2022, 20:03
FlierMate1 wrote: However, I am not very sure how to assign the 7th parameter: But it would be more normal to use push len (and later pop rcx, or add rsp, 8) to avoid overwriting a return address. For your case in the entry routine you overwrite the argc value, but since you don't use it then it doesn't matter. |
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23 Jun 2022, 20:03 |
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