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[/] [openfire2/] [trunk/] [sw/] [crt/] [crt-sram.s] - Blame information for rev 3

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# crt.asm
#       C RunTime:
#       Used for initialization of small data
#       anchors and stack for programs compiled using
#       Xilinx Gnu Tools.
#       Used for initialization of user's bss area
#       All external and static variables are initialized
 
        .globl _start
 
        .align 2
        .ent _start
_start:
        /* todo : initialize system vectors */
 
                                        /* Set the Small Data Anchors and the Stack pointer  */
        la r13, r0, _SDA_BASE_
        la r2, r0, _SDA2_BASE_
        la r1, r0, _stack               # stack is at end of heap
 
_crtinit:                               /* clear sbss */
        addi    r6,r0,__sbss_start      /* SBSS beginning       */
        addi    r7,r0,__sbss_end        /* SBSS end             */
        rsub    r18,r6,r7               /* Compare              */
        blei    r18,.Lendsbss
.Lloopsbss:
        sw      r0,r6,r0
        addi    r6,r6,4
        rsub    r18,r6,r7
        bgti    r18,.Lloopsbss
.Lendsbss:                              /* clear bss */
        addi    r6,r0,__bss_start       /* BSS beginning        */
        addi    r7,r0,__bss_end         /* BSS end              */
        rsub    r18,r6,r7               /* Compare              */
        blei    r18,.Lendbss
.Lloopbss:
        sw      r0,r6,r0
        addi    r6,r6,4
        rsub    r18,r6,r7
        bgti    r18,.Lloopbss
.Lendbss:
 
        brlid   r15,main                # enter main program (ignoring parameters: r5, r6 & r7)
        nop                             # fall throught to exit
        .end _start
 
        .globl exit                     # exit library call
        .ent exit
exit:
        brai    0x0                     # enter monitor again...
        .end exit

Line No.	Rev	Author	Line
1	3	toni32	`# crt.asm`
2			`# C RunTime:`
3			`# Used for initialization of small data`
4			`# anchors and stack for programs compiled using`
5			`# Xilinx Gnu Tools.`
6			`# Used for initialization of user's bss area`
7			`# All external and static variables are initialized`
8
9			`.globl _start`
10
11			`.align 2`
12			`.ent _start`
13			`_start:`
14			`/* todo : initialize system vectors */`
15
16			`/* Set the Small Data Anchors and the Stack pointer */`
17			`la r13, r0, _SDA_BASE_`
18			`la r2, r0, _SDA2_BASE_`
19			`la r1, r0, _stack # stack is at end of heap`
20
21			`_crtinit: /* clear sbss */`
22			`addi r6,r0,__sbss_start /* SBSS beginning */`
23			`addi r7,r0,__sbss_end /* SBSS end */`
24			`rsub r18,r6,r7 /* Compare */`
25			`blei r18,.Lendsbss`
26			`.Lloopsbss:`
27			`sw r0,r6,r0`
28			`addi r6,r6,4`
29			`rsub r18,r6,r7`
30			`bgti r18,.Lloopsbss`
31			`.Lendsbss: /* clear bss */`
32			`addi r6,r0,__bss_start /* BSS beginning */`
33			`addi r7,r0,__bss_end /* BSS end */`
34			`rsub r18,r6,r7 /* Compare */`
35			`blei r18,.Lendbss`
36			`.Lloopbss:`
37			`sw r0,r6,r0`
38			`addi r6,r6,4`
39			`rsub r18,r6,r7`
40			`bgti r18,.Lloopbss`
41			`.Lendbss:`
42
43			`brlid r15,main # enter main program (ignoring parameters: r5, r6 & r7)`
44			`nop # fall throught to exit`
45			`.end _start`
46
47			`.globl exit # exit library call`
48			`.ent exit`
49			`exit:`
50			`brai 0x0 # enter monitor again...`
51			`.end exit`

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[/] [openfire2/] [trunk/] [sw/] [crt/] [crt-sram.s] - Blame information for rev 3