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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [sysdeps/] [linux/] [sh64/] [crt0.S] - Blame information for rev 1765

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/* Startup code for SH5 & ELF.
   Copyright (C) 1999 Free Software Foundation, Inc.
   Copyright (C) 2001 Hewlett-Packard Australia
 
   This file is part of the GNU C Library.
 
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.
 
   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */
 
/* This is the canonical entry point, usually the first thing in the text
   segment.
 
        At this entry point, most registers' values are unspecified, except:
 
   sp           The stack contains the arguments and environment:
                0(sp)                   argc
                4(sp)                   argv[0]
                ...
                (4*argc)(sp)            NULL
                (4*(argc+1))(sp)        envp[0]
                ...
                                        NULL
*/
 
        .file   "crt0.S"
 
        .globl _start
        .globl __main
 
        .type   __uClibc_start_main,@function
 
        .section .text64,"xa"
        .align 2        /* 2^2 = 4 */
 
_start:
        /* Clear the frame pointer since this is the outermost frame.  */
###     mov #0, r14     # qqq
 
        /* Pop argc off the stack and save a pointer to argv */
        ld.l    r15, 0, r2      /* argc */
        addi    r15, 4, r3      /* argv */
 
        /* set up the value for the environment pointer r4 = (argc+1)*4+argv */
        addi    r2, 1, r4       /* envp = argc + 1 */
        shlli   r4, 2, r4       /* envp = envp * 4 */
        add     r3, r4, r4      /* envp = envp + argv */
 
        /* call main() */
        movi    __uClibc_start_main,r17
        ptabs/l r17,tr0
        blink   tr0,r18
 
        /* should never get here....*/
###     movi    abort@lh,r17
###     shori   abort@ll,r17
        ptabs/l r17,tr0
        blink   tr0,r63 /* call abort() => (r63) do not come back ... */
 
        /*
         *      The following is a stub to stop the GNU toolchain
         *      from calling its C-RTL initialization routines.
         */
__main:
        ptabs/l r18,tr0
        blink   tr0,r63
 

Line No.	Rev	Author	Line
1	1325	phoenix	`/* Startup code for SH5 & ELF.`
2			`Copyright (C) 1999 Free Software Foundation, Inc.`
3			`Copyright (C) 2001 Hewlett-Packard Australia`
4
5			`This file is part of the GNU C Library.`
6
7			`The GNU C Library is free software; you can redistribute it and/or`
8			`modify it under the terms of the GNU Library General Public License as`
9			`published by the Free Software Foundation; either version 2 of the`
10			`License, or (at your option) any later version.`
11
12			`The GNU C Library is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
15			`Library General Public License for more details.`
16
17			`You should have received a copy of the GNU Library General Public`
18			`License along with the GNU C Library; see the file COPYING.LIB. If not,`
19			`write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,`
20			`Boston, MA 02111-1307, USA. */`
21
22			`/* This is the canonical entry point, usually the first thing in the text`
23			`segment.`
24
25			`At this entry point, most registers' values are unspecified, except:`
26
27			`sp The stack contains the arguments and environment:`
28			`0(sp) argc`
29			`4(sp) argv[0]`
30			`...`
31			`(4*argc)(sp) NULL`
32			`(4*(argc+1))(sp) envp[0]`
33			`...`
34			`NULL`
35			`*/`
36
37			`.file "crt0.S"`
38
39			`.globl _start`
40			`.globl __main`
41
42			`.type __uClibc_start_main,@function`
43
44			`.section .text64,"xa"`
45			`.align 2 /* 2^2 = 4 */`
46
47			`_start:`
48			`/* Clear the frame pointer since this is the outermost frame. */`
49			`### mov #0, r14 # qqq`
50
51			`/* Pop argc off the stack and save a pointer to argv */`
52			`ld.l r15, 0, r2 /* argc */`
53			`addi r15, 4, r3 /* argv */`
54
55			`/* set up the value for the environment pointer r4 = (argc+1)4+argv /`
56			`addi r2, 1, r4 /* envp = argc + 1 */`
57			`shlli r4, 2, r4 /* envp = envp * 4 */`
58			`add r3, r4, r4 /* envp = envp + argv */`
59
60			`/* call main() */`
61			`movi __uClibc_start_main,r17`
62			`ptabs/l r17,tr0`
63			`blink tr0,r18`
64
65			`/* should never get here....*/`
66			`### movi abort@lh,r17`
67			`### shori abort@ll,r17`
68			`ptabs/l r17,tr0`
69			`blink tr0,r63 /* call abort() => (r63) do not come back ... */`
70
71			`/*`
72			`* The following is a stub to stop the GNU toolchain`
73			`* from calling its C-RTL initialization routines.`
74			`*/`
75			`__main:`
76			`ptabs/l r18,tr0`
77			`blink tr0,r63`
78

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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [sysdeps/] [linux/] [sh64/] [crt0.S] - Blame information for rev 1765