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编写malloc

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Yourtion
2016-05-10 14:25:08 +08:00
parent f0aa4d853d
commit 7fca384104
4 changed files with 74 additions and 2 deletions
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12
23_day/Makefile
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@@ -106,9 +106,16 @@ winhelo2.bim : winhelo2.obj a_nask.obj Makefile
winhelo2.hrb : winhelo2.bim Makefile
$(BIM2HRB) winhelo2.bim winhelo2.hrb 0
winhelo3.bim : winhelo3.obj a_nask.obj Makefile
$(OBJ2BIM) @$(RULEFILE) out:winhelo3.bim stack:1k map:winhelo3.map \
winhelo3.obj a_nask.obj
winhelo3.hrb : winhelo3.bim Makefile
$(BIM2HRB) winhelo3.bim winhelo3.hrb 40k
haribote.img : ipl10.bin haribote.sys Makefile \
hello.hrb hello2.hrb a.hrb hello3.hrb hello4.hrb hello5.hrb \
winhelo.hrb winhelo2.hrb
winhelo.hrb winhelo2.hrb winhelo3.hrb
$(EDIMG) imgin:../z_tools/fdimg0at.tek \
wbinimg src:ipl10.bin len:512 from:0 to:0 \
copy from:haribote.sys to:@: \
@@ -122,8 +129,9 @@ haribote.img : ipl10.bin haribote.sys Makefile \
copy from:hello5.hrb to:@: \
copy from:winhelo.hrb to:@: \
copy from:winhelo2.hrb to:@: \
copy from:winhelo3.hrb to:@: \
imgout:haribote.img
# 其他指令
%.gas : %.c bootpack.h Makefile

35
23_day/a_nask.nas
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@@ -9,6 +9,9 @@
GLOBAL _api_openwin
GLOBAL _api_putstrwin
GLOBAL _api_boxfilwin
GLOBAL _api_initmalloc
GLOBAL _api_malloc
GLOBAL _api_free
[SECTION .text]
@@ -83,3 +86,35 @@ _api_boxfilwin: ; void api_boxfilwin(int win, int x0, int y0, int x1, int y1, in
POP ESI
POP EDI
RET
_api_initmalloc: ; void api_initmalloc(void);
PUSH EBX
MOV EDX,8
MOV EBX,[CS:0x0020] ; malloc内存空间的地址
MOV EAX,EBX
ADD EAX,32*1024 ; 加上32KB
MOV ECX,[CS:0x0000] ; 数据段的大小
SUB ECX,EAX
INT 0x40
POP EBX
RET
_api_malloc: ; char *api_malloc(int size);
PUSH EBX
MOV EDX,9
MOV EBX,[CS:0x0020]
MOV ECX,[ESP+8] ; size
INT 0x40
POP EBX
RET
_api_free: ; void api_free(char *addr, int size);
PUSH EBX
MOV EDX,10
MOV EBX,[CS:0x0020]
MOV EAX,[ESP+ 8] ; addr
MOV ECX,[ESP+12] ; size
INT 0x40
POP EBX
RET

10
23_day/console.c
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@@ -344,6 +344,16 @@ int *hrb_api(int edi, int esi, int ebp, int esp, int ebx, int edx, int ecx, int
sht = (struct SHEET *) ebx;
boxfill8(sht->buf, sht->bxsize, ebp, eax, ecx, esi, edi);
sheet_refresh(sht, eax, ecx, esi + 1, edi + 1);
} else if (edx == 8) {
memman_init((struct MEMMAN *) (ebx + ds_base));
ecx &= 0xfffffff0; /*以16字节为单位*/
memman_free((struct MEMMAN *) (ebx + ds_base), eax, ecx);
} else if (edx == 9) {
ecx = (ecx + 0x0f) & 0xfffffff0; /*以16字节为单位进位取整*/
reg[7] = memman_alloc((struct MEMMAN *) (ebx + ds_base), ecx);
} else if (edx == 10) {
ecx = (ecx + 0x0f) & 0xfffffff0; /*以16字节为单位进位取整*/
memman_free((struct MEMMAN *) (ebx + ds_base), eax, ecx);
}
return 0;
}

19
23_day/winhelo3.c Normal file
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@@ -0,0 +1,19 @@
int api_openwin(char *buf, int xsiz, int ysiz, int col_inv, char *title);
void api_putstrwin(int win, int x, int y, int col, int len, char *str);
void api_boxfilwin(int win, int x0, int y0, int x1, int y1, int col);
void api_initmalloc(void);
char *api_malloc(int size);
void api_end(void);
void HariMain(void)
{
char *buf;
int win;
api_initmalloc();
buf = api_malloc(150 * 50);
win = api_openwin(buf, 150, 50, -1, "hello");
api_boxfilwin(win, 8, 36, 141, 43, 6); /*浅蓝色*/
api_putstrwin(win, 28, 28, 0 , 12, "hello, world");/*黑色*/
api_end();
}