Browse Source

Deleted -e option and bf interpreter capabilities

Yann Weber 5 years ago
parent
commit
6ab1331032
1 changed files with 14 additions and 52 deletions
  1. 14
    52
      bfc.asm

+ 14
- 52
bfc.asm View File

@@ -1,4 +1,4 @@
1
-; bfc : a brainfuck compiler & interpreter
1
+; bfc : a brainfuck compiler
2 2
 ; Copyright (C) 2018 Weber Yann
3 3
 ; 
4 4
 ; This program is free software; you can redistribute it and/or modify
@@ -14,14 +14,13 @@
14 14
 ; You should have received a copy of the GNU General Public License
15 15
 ; along with this program.  If not, see <http://www.gnu.org/licenses/>.
16 16
 ;
17
-; A brainfuck compiler & interpreter :
17
+; A brainfuck compiler :
18 18
 ; Build : nasm -felf64 bfc.asm && ld -s -melf_x86_64 bfc.o -o bfc
19 19
 ;
20
-; ./bfc [-h] [-e [-o a.out]] FILE.bf
20
+; ./bfc [-h] [-o a.out] FILE.bf
21 21
 ; Options :
22 22
 ; 	-h print usage and exit
23
-;	-e tell bfc to produce a elf file
24
-;	-o with -e indicate the file to create
23
+;	-o indicate the file to create default is a.out
25 24
 ;	FILE.bf the brainfuck source file to compile
26 25
 [bits 64]
27 26
 %use smartalign
@@ -323,7 +322,7 @@ section .data
323 322
 	chr_list : db ": ", 0xA, 0x0
324 323
 	read_error: db "Error reading file "
325 324
 	read_error_sz: equ $ - read_error
326
-	usage_err: db "Usage : [-e [-o a.out]] FILE.BF"
325
+	usage_err: db "Usage : [-o a.out] FILE.BF"
327 326
 	usage_err_sz: equ $ - usage_err
328 327
 	open_err: db "Error opening file", 0xa
329 328
 	open_err_sz: equ $ - open_err
@@ -334,9 +333,9 @@ _start:
334 333
 ; using heap to store arguments
335 334
 %define bf_source [r13]
336 335
 %define elf_file [r13+0x8]
337
-%define elf_out [r13+0x11]
338
-%define heap_size 0x12
336
+%define heap_size 0x10
339 337
 	
338
+	;heap init
340 339
 	mov rax, 0xc
341 340
 	xor rdi, rdi
342 341
 	syscall
@@ -346,12 +345,15 @@ _start:
346 345
 	mov rax, 0xc
347 346
 	syscall
348 347
 
348
+	mov rax, default_output
349
+	mov elf_file, rax
350
+
349 351
 	;argument parsing
350 352
 	mov rcx, [rsp] ; argc
351 353
 	cmp rcx, 2
352 354
 	jl .badarg
353
-	je .init_1arg
354
-	cmp rcx, 5
355
+	;je .init_1arg
356
+	cmp rcx, 4
355 357
 	jg .badarg
356 358
 
357 359
 	mov rsi, rsp
@@ -370,8 +372,6 @@ _start:
370 372
 		mov al, [rdi+1]
371 373
 		cmp al, 0x68 ; '-h'
372 374
 		je .badarg
373
-		cmp al, 0x65 ; '-e'
374
-		je .elfout_arg
375 375
 		cmp al, 0x6f ; '-o'
376 376
 		jne .badarg
377 377
 
@@ -385,20 +385,6 @@ _start:
385 385
 		loop .argloop
386 386
 		jmp .init
387 387
 
388
-		.elfout_arg:
389
-			mov al, 0x1
390
-			mov elf_out, al
391
-			mov rax, elf_file
392
-			test rax, rax
393
-			jz .default_out
394
-			.elfout_arg_end:
395
-			loop .argloop
396
-			jmp .init
397
-			.default_out:
398
-				mov rax, default_output
399
-				mov elf_file, rax
400
-				jmp .elfout_arg_end
401
-
402 388
 		.filearg:
403 389
 			mov rax, bf_source
404 390
 			cmp rax, 0
@@ -406,11 +392,7 @@ _start:
406 392
 			jnz .badarg ; file allready given
407 393
 			mov bf_source, rdi
408 394
 			loop .argloop
409
-			jmp .init
410
-
411
-	.init_1arg:
412
-		mov rax, [rsp+16]
413
-		mov bf_source, rax
395
+			jmp .init ; useless
414 396
 	.init:
415 397
 	; code map init
416 398
 	; rsi map size
@@ -439,27 +421,7 @@ _start:
439 421
 	mov rax, 0x3 ; close
440 422
 	syscall
441 423
 
442
-	mov al, elf_out
443
-	test al, al
444
-	jnz .write_elf
445
-
446
-	
447
-	.code_jmp:
448
-	; restore heap
449
-	mov rax, 0xc
450
-	mov rdi, r13
451
-	syscall
452
-	; set code map perm
453
-	mov rax, 0xA ; mprotect
454
-	mov rdi, r15
455
-	mov rsi, r14
456
-	mov rdx, 0x4 | 0x1 ; PROT_EXEC | PROT_READ
457
-	syscall
458
-
459
-	push r15
460
-	jmp r15 ; end... jumping in bf code map
461
-
462
-	.write_elf: ; writing elf file
424
+	; writing elf file
463 425
 	mov rax, [rsp] ; map len
464 426
 	mov [elf_section_text_sz], rax
465 427
 	add rax, elf_head_sz ; elf head + map_ptr

Loading…
Cancel
Save