lxdream 0.9.1| filename | test/crt0.s |
| changeset | 185:6755a04c447f |
| author | nkeynes |
| date | Mon May 26 11:01:42 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | hange 64-bit configuration to use sizeof(void *) rather than the system id returned by config.guess - config.guess gets it wrong in some situations. |
| view | annotate | diff | log | raw |
1 .section .text
2 .global start
3 .global ___exit
4 .global _atexit
5 start:
6 mov.l setup_cache_k,r0
7 mov.l p2_mask,r1
8 or r1,r0
9 jmp @r0
10 nop
11 setup_cache:
12 mov.l ccr_addr,r0
13 mov.w ccr_data,r1
14 mov.l r1,@r0
15 mov.l start_2_k,r0
16 nop
17 nop
18 nop
19 nop
20 nop
21 nop
22 nop
23 jmp @r0
24 nop
25 start_2:
26 mov.l old_stack_k,r14
27 mov.l r15,@r14
28 mov.l old_pr_k,r14
29 sts pr,r15
30 mov.l r15,@r14
31 mov.l stack_k,r15
33 ! zero out bss
34 mov.l edata_k,r0
35 mov.l end_k,r1
36 mov #0,r2
37 start_l:
38 mov.l r2,@r0
39 add #4,r0
40 cmp/ge r0,r1
41 bt start_l
43 #if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY)
44 mov.l set_fpscr_k, r1
45 jsr @r1
46 mov #0,r4
47 lds r3,fpscr
48 #endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) */
50 ! call the mainline
51 mov.l main_k,r0
52 jsr @r0
53 or r0,r0
55 ! call exit
56 mov r0,r4
57 mov.l exit_k,r0
58 jsr @r0
59 or r0,r0
61 ___exit:
62 mov.l old_pr_k,r14
63 mov.l @r14,r15
64 lds r15,pr
65 mov.l old_stack_k,r14
66 mov.l @r14,r15
67 rts
68 nop
70 _atexit:
71 rts
72 nop
74 .align 4
75 #if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__)
76 set_fpscr_k:
77 .long ___set_fpscr
78 #endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(SH4_SINGLE_ONLY) */
79 stack_k:
80 .long _stack
81 edata_k:
82 .long _edata
83 end_k:
84 .long _end
85 main_k:
86 .long _main
87 exit_k:
88 .long _exit
90 old_stack_k:
91 .long _old_stack
92 old_pr_k:
93 .long _old_pr
95 _old_stack:
96 .long 0
97 _old_pr:
98 .long 0
100 setup_cache_k:
101 .long setup_cache
102 start_2_k:
103 .long start_2
104 p2_mask:
105 .long 0xa0000000
106 ccr_addr:
107 .long 0xff00001c
108 ccr_data:
109 .word 0x090b
111 .align 4
113 #ifdef __ELF__
114 .section .stack,"aw"
115 #else
116 .section .stack
117 #endif
118 ! _stack: .long 0xdeaddead
.