forked from KolibriOS/kolibrios
libc.obj: Use crt0.asm by Coldy as default
git-svn-id: svn://kolibrios.org@9554 a494cfbc-eb01-0410-851d-a64ba20cac60
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turbocat
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0428045f25
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@ -1,35 +1,32 @@
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;
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; 2021, Edited by Coldy
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;
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; This module same as original crt0.asm, but cut:
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; 1. virtual header block (hparams change to __app_params, hpath change to __app_path)
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; 2. init heap of memory - not needed because 68.18 (68.19) init heap implicitly
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; (it is does dll.obj)
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; 3. loader (he lives in dll.obj)
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;
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format ELF
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section '.text' executable
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public start
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public start as '_start'
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;extrn mf_init
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extrn main
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include '../../../../../proc32.inc'
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include '../../../../../macros.inc'
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include '../../../../../dll.inc'
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;include '../../../../../debug.inc'
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;start_:
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virtual at 0
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db 'MENUET01' ; 1. Magic number (8 bytes)
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dd 0x01 ; 2. Version of executable file
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dd start ; 3. Start address
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imgsz dd 0x0 ; 4. Size of image
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dd 0x100000 ; 5. Size of needed memory
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dd 0x100000 ; 6. Pointer to stack
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hparams dd 0x0 ; 7. Pointer to program arguments
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hpath dd 0x0 ; 8. Pointer to program path
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end virtual
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extrn main
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;include 'debug2.inc'
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include '/../../../../../../proc32.inc'
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include '/../../../../../../macros.inc'
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__DEBUG__ = 0
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__app_params equ 0x1C ; Pointer to program arguments
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;__app_path equ 0x20 ; Pointer to program path
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start:
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;DEBUGF 'Start programm\n'
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;init heap of memory
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mov eax,68
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mov ebx,11
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int 0x40
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mov [argc], 0
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mov eax, [hparams]
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mov eax, [__app_params]
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test eax, eax
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jz .without_path
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mov eax, path
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@ -85,7 +82,6 @@ start:
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jmp .parse
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.run:
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call load_imports
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push argv
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push [argc]
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call main
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@ -112,101 +108,9 @@ push_param:
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inc [argc]
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.dont_add:
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ret
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;==============================
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;==============================
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load_imports:
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;==============================
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;parameters
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; none
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;description
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; imports must be located at end of image (but before BSS sections)
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; the address of end of imports (next byte after imports) is located in imgsz
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; look at each import from that address up to illegal import
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; legal import is such that:
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; first pointer points to procedure name
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; and is smaller than imgsz
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; second pointer points lo library name, starting with 0x55, 0xAA
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; and is smaller than imgsz
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; each library should be initialized as appropriate, once
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; so as library is initialized, its name will be replaced 0x00
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mov ebx, [imgsz] ; byte after imports
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.handle_next_import:
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sub ebx, 4 ; ebx = pointer to pointer to library name
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mov esi, dword[ebx] ; esi = pointer to library name
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push ebx
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push esi
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call load_library ; eax = pointer to library exports
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pop esi
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pop ebx
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test eax, eax
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jz .done
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sub ebx, 4 ; ebx = pointer to pointer to symbol name
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push ebx
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stdcall dll.GetProcAddress, eax, dword[ebx]
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pop ebx
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test eax, eax
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jz .fail
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mov dword[ebx], eax
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jmp .handle_next_import
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.done:
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;DEBUGF 1, "Library: %s not loaded!\n", esi
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;mcall -1
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ret
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.fail:
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ret
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;==============================
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;==============================
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load_library:
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;==============================
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;parameters
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; ebx: library name address
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;description
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; each library should be initialized as appropriate, once
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; so as library is initialized, its name will be replaced 0x00
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; and 4 next bytes will be set to address of library
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; first two bytes of library name must be 0x55, 0xAA (is like a magic)
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cld ; move esi further, not back
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cmp esi, [imgsz]
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ja .fail
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lodsb ; al = first byte of library name
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cmp al, 0x55
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jne .fail
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lodsb ; al = second byte of library name
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cmp al, 0xAA
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jne .fail
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lodsb ; al = third byte of library name (0x00 if the library is already loaded)
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test al, al
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jnz .load
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lodsd ; if we here, then third byte is 0x00 => address of library is in next 4 bytes
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; now eax contains address of library
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ret
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.load:
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dec esi ; we checked on 0 before, let's go back
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mov eax, 68
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mov ebx, 19
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mov ecx, esi
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int 0x40 ; eax = address of exports
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mov byte[esi], 0 ; library is loaded, let's place 0 in first byte of name
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mov [esi + 1], eax ; now next 4 bytes of library name are replaced by address of library
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; call lib_init
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stdcall dll.GetProcAddress, eax, lib_init_str ; eax = address of lib_init
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test eax, eax
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jz .ret
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stdcall dll.Init, eax
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.ret:
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mov eax, [esi + 1] ; put address of library into eax
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ret
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.fail:
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mov eax, 0
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ret
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;==============================
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lib_init_str db 'lib_init', 0
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public argc as '__argc'
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public params as '__argv'
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public path as '__path'
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@ -219,3 +123,5 @@ argv rd max_parameters
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path rb buf_len
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params rb buf_len
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;section '.data'
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;include_debug_strings ; ALWAYS present in data section
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@ -7,31 +7,25 @@ static char* __con_dllname = "/sys/lib/console.obj";
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int __con_is_load = 0;
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void stdcall (*__con_init_hidden)(int wnd_width, unsigned wnd_height, int scr_width, int scr_height, const char* title);
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void stdcall (*con_exit)(int);
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void stdcall (*con_set_title)(const char* title);
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void stdcall (*con_write_asciiz)(const char* str);
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void stdcall (*con_write_string)(const char* str, dword length);
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int cdecl (*con_printf)(const char* format, ...);
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dword stdcall (*con_get_flags)(void);
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dword stdcall (*con_set_flags)(dword new_flags);
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int stdcall (*con_get_font_height)(void);
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int stdcall (*con_get_cursor_height)(void);
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int stdcall (*con_set_cursor_height)(int new_height);
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int stdcall (*con_getch)(void);
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word stdcall (*con_getch2)(void);
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int stdcall (*con_kbhit)(void);
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char* stdcall (*con_gets)(char* str, int n);
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char* stdcall (*con_gets2)(con_gets2_callback callback, char* str, int n);
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void stdcall (*con_cls)();
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void stdcall (*con_get_cursor_pos)(int* px, int* py);
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void stdcall (*con_set_cursor_pos)(int x, int y);
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/*static void __con_panic(char* func_name)
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{
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debug_printf("In console.obj %s=NULL!\n", func_name);
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_ksys_exit();
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}*/
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void __stdcall (*__con_init_hidden)(int wnd_width, unsigned wnd_height, int scr_width, int scr_height, const char* title);
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void __stdcall (*con_exit)(int);
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void __stdcall (*con_set_title)(const char* title);
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void __stdcall (*con_write_asciiz)(const char* str);
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void __stdcall (*con_write_string)(const char* str, dword length);
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int __cdecl (*con_printf)(const char* format, ...);
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dword __stdcall (*con_get_flags)(void);
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dword __stdcall (*con_set_flags)(dword new_flags);
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int __stdcall (*con_get_font_height)(void);
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int __stdcall (*con_get_cursor_height)(void);
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int __stdcall (*con_set_cursor_height)(int new_height);
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int __stdcall (*con_getch)(void);
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word __stdcall (*con_getch2)(void);
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int __stdcall (*con_kbhit)(void);
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char* __stdcall (*con_gets)(char* str, int n);
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char* __stdcall (*con_gets2)(con_gets2_callback callback, char* str, int n);
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void __stdcall (*con_cls)();
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void __stdcall (*con_get_cursor_pos)(int* px, int* py);
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void __stdcall (*con_set_cursor_pos)(int x, int y);
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static void __con_lib_link(ksys_dll_t *exp)
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{
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